./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe011_tso.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/protection/safe011_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/safe011_tso.i ./goblint.2024-06-19_11-23-25.files/protection/safe011_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 --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-27 19:20:23,970 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 19:20:24,037 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 19:20:24,044 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 19:20:24,045 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 19:20:24,068 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 19:20:24,068 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 19:20:24,068 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 19:20:24,069 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 19:20:24,072 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 19:20:24,072 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 19:20:24,072 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 19:20:24,073 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 19:20:24,074 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 19:20:24,074 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 19:20:24,074 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 19:20:24,074 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 19:20:24,075 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 19:20:24,075 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 19:20:24,075 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 19:20:24,075 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 19:20:24,076 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 19:20:24,076 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 19:20:24,076 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 19:20:24,076 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 19:20:24,076 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 19:20:24,077 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 19:20:24,077 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 19:20:24,077 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 19:20:24,077 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 19:20:24,078 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 19:20:24,078 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 19:20:24,078 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 19:20:24,079 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 19:20:24,079 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 19:20:24,079 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 19:20:24,079 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 19:20:24,079 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 19:20:24,079 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 19:20:24,080 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 19:20:24,080 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 19:20:24,080 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 19:20:24,080 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 19:20:24,080 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-27 19:20:24,286 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 19:20:24,301 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 19:20:24,303 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 19:20:24,304 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 19:20:24,304 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 19:20:24,305 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/safe011_tso.yml/witness.yml [2024-06-27 19:20:24,432 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 19:20:24,433 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 19:20:24,433 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe011_tso.i [2024-06-27 19:20:25,394 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 19:20:25,632 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 19:20:25,633 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe011_tso.i [2024-06-27 19:20:25,645 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1ebe5ed3c/70db8a2b5cf84d22a34ef0e9297a42de/FLAG8072c3009 [2024-06-27 19:20:25,659 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1ebe5ed3c/70db8a2b5cf84d22a34ef0e9297a42de [2024-06-27 19:20:25,660 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 19:20:25,661 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 19:20:25,663 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 19:20:25,663 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 19:20:25,667 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 19:20:25,668 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 07:20:24" (1/2) ... [2024-06-27 19:20:25,669 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a768a24 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 07:20:25, skipping insertion in model container [2024-06-27 19:20:25,669 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 07:20:24" (1/2) ... [2024-06-27 19:20:25,670 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@775a3036 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 07:20:25, skipping insertion in model container [2024-06-27 19:20:25,671 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 07:20:25" (2/2) ... [2024-06-27 19:20:25,671 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a768a24 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:20:25, skipping insertion in model container [2024-06-27 19:20:25,671 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 07:20:25" (2/2) ... [2024-06-27 19:20:25,671 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 19:20:25,705 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 19:20:25,706 INFO L97 edCorrectnessWitness]: Location invariant before [L781-L781] ((((! multithreaded || ((z == 0 || z == 1) || z == 2)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || (y == 0 || y == 1)) [2024-06-27 19:20:25,706 INFO L97 edCorrectnessWitness]: Location invariant before [L782-L782] ((((! multithreaded || ((z == 0 || z == 1) || z == 2)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || (y == 0 || y == 1)) [2024-06-27 19:20:25,706 INFO L97 edCorrectnessWitness]: Location invariant before [L779-L779] ((((! multithreaded || ((z == 0 || z == 1) || z == 2)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || (y == 0 || y == 1)) [2024-06-27 19:20:25,706 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 19:20:25,707 INFO L106 edCorrectnessWitness]: ghost_update [L777-L777] multithreaded = 1; [2024-06-27 19:20:25,743 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 19:20:26,033 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 19:20:26,040 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-27 19:20:26,122 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 19:20:26,146 INFO L206 MainTranslator]: Completed translation [2024-06-27 19:20:26,147 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:20:26 WrapperNode [2024-06-27 19:20:26,147 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 19:20:26,147 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 19:20:26,148 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 19:20:26,148 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 19:20:26,152 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:20:26" (1/1) ... [2024-06-27 19:20:26,161 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:20:26" (1/1) ... [2024-06-27 19:20:26,175 INFO L138 Inliner]: procedures = 175, calls = 42, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 65 [2024-06-27 19:20:26,176 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 19:20:26,176 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 19:20:26,176 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 19:20:26,176 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 19:20:26,183 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:20:26" (1/1) ... [2024-06-27 19:20:26,183 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:20:26" (1/1) ... [2024-06-27 19:20:26,203 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:20:26" (1/1) ... [2024-06-27 19:20:26,217 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-27 19:20:26,217 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:20:26" (1/1) ... [2024-06-27 19:20:26,218 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:20:26" (1/1) ... [2024-06-27 19:20:26,223 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:20:26" (1/1) ... [2024-06-27 19:20:26,225 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:20:26" (1/1) ... [2024-06-27 19:20:26,226 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:20:26" (1/1) ... [2024-06-27 19:20:26,226 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:20:26" (1/1) ... [2024-06-27 19:20:26,229 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 19:20:26,230 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 19:20:26,230 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 19:20:26,230 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 19:20:26,231 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:20:26" (1/1) ... [2024-06-27 19:20:26,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 19:20:26,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 19:20:26,256 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 19:20:26,284 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 19:20:26,303 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 19:20:26,303 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 19:20:26,304 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-27 19:20:26,304 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-27 19:20:26,304 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-27 19:20:26,304 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-27 19:20:26,304 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-27 19:20:26,304 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-27 19:20:26,304 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 19:20:26,304 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 19:20:26,305 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 19:20:26,305 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 19:20:26,306 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 19:20:26,396 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 19:20:26,397 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 19:20:26,544 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 19:20:26,545 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 19:20:26,606 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 19:20:26,607 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-27 19:20:26,607 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 07:20:26 BoogieIcfgContainer [2024-06-27 19:20:26,609 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 19:20:26,610 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 19:20:26,610 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 19:20:26,612 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 19:20:26,613 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 07:20:24" (1/4) ... [2024-06-27 19:20:26,613 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45868169 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 07:20:26, skipping insertion in model container [2024-06-27 19:20:26,613 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 07:20:25" (2/4) ... [2024-06-27 19:20:26,613 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45868169 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 07:20:26, skipping insertion in model container [2024-06-27 19:20:26,613 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:20:26" (3/4) ... [2024-06-27 19:20:26,614 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45868169 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 07:20:26, skipping insertion in model container [2024-06-27 19:20:26,614 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 07:20:26" (4/4) ... [2024-06-27 19:20:26,615 INFO L112 eAbstractionObserver]: Analyzing ICFG safe011_tso.i [2024-06-27 19:20:26,651 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 19:20:26,651 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-27 19:20:26,651 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 19:20:26,695 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 19:20:26,718 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 50 places, 40 transitions, 92 flow [2024-06-27 19:20:26,748 INFO L124 PetriNetUnfolderBase]: 0/37 cut-off events. [2024-06-27 19:20:26,749 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 19:20:26,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47 conditions, 37 events. 0/37 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 61 event pairs, 0 based on Foata normal form. 0/34 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-27 19:20:26,751 INFO L82 GeneralOperation]: Start removeDead. Operand has 50 places, 40 transitions, 92 flow [2024-06-27 19:20:26,753 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 41 places, 31 transitions, 71 flow [2024-06-27 19:20:26,760 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 19:20:26,766 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;@7aa31357, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 19:20:26,766 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-27 19:20:26,770 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 19:20:26,770 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-27 19:20:26,770 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 19:20:26,770 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:20:26,771 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-27 19:20:26,771 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:20:26,774 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:20:26,774 INFO L85 PathProgramCache]: Analyzing trace with hash 218856700, now seen corresponding path program 1 times [2024-06-27 19:20:26,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:20:26,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459469902] [2024-06-27 19:20:26,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:20:26,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:20:26,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:20:27,142 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 19:20:27,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:20:27,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459469902] [2024-06-27 19:20:27,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459469902] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:20:27,143 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:20:27,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 19:20:27,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837477017] [2024-06-27 19:20:27,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:20:27,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 19:20:27,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:20:27,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 19:20:27,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 19:20:27,203 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-27 19:20:27,205 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 31 transitions, 71 flow. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:27,205 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:20:27,205 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-27 19:20:27,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:20:27,407 INFO L124 PetriNetUnfolderBase]: 776/1272 cut-off events. [2024-06-27 19:20:27,407 INFO L125 PetriNetUnfolderBase]: For 29/29 co-relation queries the response was YES. [2024-06-27 19:20:27,413 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2533 conditions, 1272 events. 776/1272 cut-off events. For 29/29 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 6351 event pairs, 511 based on Foata normal form. 1/1210 useless extension candidates. Maximal degree in co-relation 2521. Up to 1186 conditions per place. [2024-06-27 19:20:27,442 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 29 selfloop transitions, 4 changer transitions 0/41 dead transitions. [2024-06-27 19:20:27,442 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 41 transitions, 163 flow [2024-06-27 19:20:27,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 19:20:27,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 19:20:27,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 81 transitions. [2024-06-27 19:20:27,453 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.675 [2024-06-27 19:20:27,454 INFO L175 Difference]: Start difference. First operand has 41 places, 31 transitions, 71 flow. Second operand 3 states and 81 transitions. [2024-06-27 19:20:27,455 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 41 transitions, 163 flow [2024-06-27 19:20:27,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 41 transitions, 158 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-27 19:20:27,459 INFO L231 Difference]: Finished difference. Result has 41 places, 34 transitions, 98 flow [2024-06-27 19:20:27,460 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=98, PETRI_PLACES=41, PETRI_TRANSITIONS=34} [2024-06-27 19:20:27,466 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 0 predicate places. [2024-06-27 19:20:27,466 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 34 transitions, 98 flow [2024-06-27 19:20:27,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:27,467 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:20:27,467 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:20:27,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 19:20:27,467 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:20:27,468 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:20:27,468 INFO L85 PathProgramCache]: Analyzing trace with hash -131900529, now seen corresponding path program 1 times [2024-06-27 19:20:27,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:20:27,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610174278] [2024-06-27 19:20:27,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:20:27,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:20:27,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:20:27,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:20:27,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:20:27,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610174278] [2024-06-27 19:20:27,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610174278] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:20:27,589 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:20:27,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 19:20:27,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76086010] [2024-06-27 19:20:27,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:20:27,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 19:20:27,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:20:27,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 19:20:27,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-27 19:20:27,632 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-27 19:20:27,633 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 34 transitions, 98 flow. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:27,633 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:20:27,633 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-27 19:20:27,633 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:20:27,765 INFO L124 PetriNetUnfolderBase]: 777/1280 cut-off events. [2024-06-27 19:20:27,765 INFO L125 PetriNetUnfolderBase]: For 229/237 co-relation queries the response was YES. [2024-06-27 19:20:27,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2914 conditions, 1280 events. 777/1280 cut-off events. For 229/237 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 6279 event pairs, 423 based on Foata normal form. 7/1255 useless extension candidates. Maximal degree in co-relation 2902. Up to 1160 conditions per place. [2024-06-27 19:20:27,772 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 38 selfloop transitions, 11 changer transitions 0/57 dead transitions. [2024-06-27 19:20:27,772 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 57 transitions, 260 flow [2024-06-27 19:20:27,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 19:20:27,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 19:20:27,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 110 transitions. [2024-06-27 19:20:27,776 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6875 [2024-06-27 19:20:27,777 INFO L175 Difference]: Start difference. First operand has 41 places, 34 transitions, 98 flow. Second operand 4 states and 110 transitions. [2024-06-27 19:20:27,777 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 57 transitions, 260 flow [2024-06-27 19:20:27,778 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 57 transitions, 256 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 19:20:27,780 INFO L231 Difference]: Finished difference. Result has 45 places, 42 transitions, 170 flow [2024-06-27 19:20:27,780 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=170, PETRI_PLACES=45, PETRI_TRANSITIONS=42} [2024-06-27 19:20:27,781 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 4 predicate places. [2024-06-27 19:20:27,781 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 42 transitions, 170 flow [2024-06-27 19:20:27,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:27,781 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:20:27,782 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:20:27,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 19:20:27,784 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:20:27,785 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:20:27,785 INFO L85 PathProgramCache]: Analyzing trace with hash 206052061, now seen corresponding path program 1 times [2024-06-27 19:20:27,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:20:27,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284612985] [2024-06-27 19:20:27,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:20:27,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:20:27,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:20:27,883 INFO 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 19:20:27,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:20:27,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284612985] [2024-06-27 19:20:27,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284612985] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:20:27,884 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:20:27,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 19:20:27,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377730299] [2024-06-27 19:20:27,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:20:27,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 19:20:27,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:20:27,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 19:20:27,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 19:20:27,915 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-27 19:20:27,916 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 42 transitions, 170 flow. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 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 19:20:27,916 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:20:27,917 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-27 19:20:27,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:20:28,066 INFO L124 PetriNetUnfolderBase]: 815/1351 cut-off events. [2024-06-27 19:20:28,067 INFO L125 PetriNetUnfolderBase]: For 979/995 co-relation queries the response was YES. [2024-06-27 19:20:28,069 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3620 conditions, 1351 events. 815/1351 cut-off events. For 979/995 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 6633 event pairs, 249 based on Foata normal form. 11/1352 useless extension candidates. Maximal degree in co-relation 3605. Up to 1090 conditions per place. [2024-06-27 19:20:28,075 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 55 selfloop transitions, 21 changer transitions 0/84 dead transitions. [2024-06-27 19:20:28,075 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 84 transitions, 468 flow [2024-06-27 19:20:28,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:20:28,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:20:28,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 144 transitions. [2024-06-27 19:20:28,080 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.72 [2024-06-27 19:20:28,080 INFO L175 Difference]: Start difference. First operand has 45 places, 42 transitions, 170 flow. Second operand 5 states and 144 transitions. [2024-06-27 19:20:28,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 84 transitions, 468 flow [2024-06-27 19:20:28,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 84 transitions, 464 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-06-27 19:20:28,085 INFO L231 Difference]: Finished difference. Result has 52 places, 56 transitions, 312 flow [2024-06-27 19:20:28,085 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=312, PETRI_PLACES=52, PETRI_TRANSITIONS=56} [2024-06-27 19:20:28,086 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 11 predicate places. [2024-06-27 19:20:28,086 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 56 transitions, 312 flow [2024-06-27 19:20:28,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 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 19:20:28,087 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:20:28,087 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:20:28,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 19:20:28,087 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:20:28,088 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:20:28,088 INFO L85 PathProgramCache]: Analyzing trace with hash -410706608, now seen corresponding path program 1 times [2024-06-27 19:20:28,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:20:28,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415496437] [2024-06-27 19:20:28,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:20:28,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:20:28,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:20:28,235 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 19:20:28,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:20:28,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415496437] [2024-06-27 19:20:28,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415496437] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:20:28,239 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:20:28,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:20:28,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101409201] [2024-06-27 19:20:28,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:20:28,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:20:28,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:20:28,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:20:28,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:20:28,283 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-27 19:20:28,283 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 56 transitions, 312 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:28,284 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:20:28,284 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-27 19:20:28,285 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:20:28,478 INFO L124 PetriNetUnfolderBase]: 903/1493 cut-off events. [2024-06-27 19:20:28,478 INFO L125 PetriNetUnfolderBase]: For 2620/2653 co-relation queries the response was YES. [2024-06-27 19:20:28,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4981 conditions, 1493 events. 903/1493 cut-off events. For 2620/2653 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 7509 event pairs, 161 based on Foata normal form. 38/1521 useless extension candidates. Maximal degree in co-relation 4961. Up to 1094 conditions per place. [2024-06-27 19:20:28,487 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 62 selfloop transitions, 24 changer transitions 0/94 dead transitions. [2024-06-27 19:20:28,487 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 94 transitions, 632 flow [2024-06-27 19:20:28,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:20:28,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:20:28,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 169 transitions. [2024-06-27 19:20:28,489 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7041666666666667 [2024-06-27 19:20:28,489 INFO L175 Difference]: Start difference. First operand has 52 places, 56 transitions, 312 flow. Second operand 6 states and 169 transitions. [2024-06-27 19:20:28,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 94 transitions, 632 flow [2024-06-27 19:20:28,495 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 94 transitions, 620 flow, removed 6 selfloop flow, removed 0 redundant places. [2024-06-27 19:20:28,497 INFO L231 Difference]: Finished difference. Result has 57 places, 58 transitions, 377 flow [2024-06-27 19:20:28,497 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=292, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=377, PETRI_PLACES=57, PETRI_TRANSITIONS=58} [2024-06-27 19:20:28,498 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 16 predicate places. [2024-06-27 19:20:28,498 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 58 transitions, 377 flow [2024-06-27 19:20:28,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:28,498 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:20:28,499 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:20:28,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 19:20:28,499 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:20:28,499 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:20:28,499 INFO L85 PathProgramCache]: Analyzing trace with hash -1224206505, now seen corresponding path program 1 times [2024-06-27 19:20:28,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:20:28,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325958268] [2024-06-27 19:20:28,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:20:28,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:20:28,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:20:28,560 INFO 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 19:20:28,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:20:28,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325958268] [2024-06-27 19:20:28,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325958268] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:20:28,561 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:20:28,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 19:20:28,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114162020] [2024-06-27 19:20:28,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:20:28,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 19:20:28,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:20:28,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 19:20:28,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-27 19:20:28,586 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-27 19:20:28,586 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 58 transitions, 377 flow. Second operand has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:28,587 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:20:28,587 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-27 19:20:28,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:20:28,704 INFO L124 PetriNetUnfolderBase]: 898/1485 cut-off events. [2024-06-27 19:20:28,704 INFO L125 PetriNetUnfolderBase]: For 3294/3313 co-relation queries the response was YES. [2024-06-27 19:20:28,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5451 conditions, 1485 events. 898/1485 cut-off events. For 3294/3313 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 7564 event pairs, 292 based on Foata normal form. 11/1495 useless extension candidates. Maximal degree in co-relation 5428. Up to 1369 conditions per place. [2024-06-27 19:20:28,712 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 57 selfloop transitions, 7 changer transitions 0/72 dead transitions. [2024-06-27 19:20:28,712 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 72 transitions, 564 flow [2024-06-27 19:20:28,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 19:20:28,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 19:20:28,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 101 transitions. [2024-06-27 19:20:28,713 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.63125 [2024-06-27 19:20:28,713 INFO L175 Difference]: Start difference. First operand has 57 places, 58 transitions, 377 flow. Second operand 4 states and 101 transitions. [2024-06-27 19:20:28,713 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 72 transitions, 564 flow [2024-06-27 19:20:28,716 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 72 transitions, 505 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-27 19:20:28,717 INFO L231 Difference]: Finished difference. Result has 57 places, 61 transitions, 377 flow [2024-06-27 19:20:28,717 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=322, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=377, PETRI_PLACES=57, PETRI_TRANSITIONS=61} [2024-06-27 19:20:28,718 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 16 predicate places. [2024-06-27 19:20:28,718 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 61 transitions, 377 flow [2024-06-27 19:20:28,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:28,718 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:20:28,718 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:20:28,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 19:20:28,719 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:20:28,719 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:20:28,719 INFO L85 PathProgramCache]: Analyzing trace with hash 703353189, now seen corresponding path program 1 times [2024-06-27 19:20:28,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:20:28,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328969058] [2024-06-27 19:20:28,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:20:28,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:20:28,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:20:28,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:20:28,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:20:28,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328969058] [2024-06-27 19:20:28,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328969058] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:20:28,796 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:20:28,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 19:20:28,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733167690] [2024-06-27 19:20:28,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:20:28,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 19:20:28,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:20:28,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 19:20:28,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 19:20:28,822 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:20:28,822 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 61 transitions, 377 flow. Second operand has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:28,822 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:20:28,822 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:20:28,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:20:28,960 INFO L124 PetriNetUnfolderBase]: 1064/1754 cut-off events. [2024-06-27 19:20:28,961 INFO L125 PetriNetUnfolderBase]: For 3954/3954 co-relation queries the response was YES. [2024-06-27 19:20:28,964 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6104 conditions, 1754 events. 1064/1754 cut-off events. For 3954/3954 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 9023 event pairs, 373 based on Foata normal form. 2/1755 useless extension candidates. Maximal degree in co-relation 6080. Up to 1602 conditions per place. [2024-06-27 19:20:28,970 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 68 selfloop transitions, 10 changer transitions 0/85 dead transitions. [2024-06-27 19:20:28,970 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 85 transitions, 630 flow [2024-06-27 19:20:28,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:20:28,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:20:28,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 119 transitions. [2024-06-27 19:20:28,972 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.595 [2024-06-27 19:20:28,972 INFO L175 Difference]: Start difference. First operand has 57 places, 61 transitions, 377 flow. Second operand 5 states and 119 transitions. [2024-06-27 19:20:28,972 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 85 transitions, 630 flow [2024-06-27 19:20:28,976 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 85 transitions, 597 flow, removed 9 selfloop flow, removed 2 redundant places. [2024-06-27 19:20:28,978 INFO L231 Difference]: Finished difference. Result has 62 places, 70 transitions, 453 flow [2024-06-27 19:20:28,978 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=353, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=453, PETRI_PLACES=62, PETRI_TRANSITIONS=70} [2024-06-27 19:20:28,981 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 21 predicate places. [2024-06-27 19:20:28,981 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 70 transitions, 453 flow [2024-06-27 19:20:28,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:28,981 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:20:28,981 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:20:28,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 19:20:28,982 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:20:28,982 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:20:28,982 INFO L85 PathProgramCache]: Analyzing trace with hash -563189036, now seen corresponding path program 1 times [2024-06-27 19:20:28,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:20:28,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857291172] [2024-06-27 19:20:28,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:20:28,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:20:28,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:20:29,091 INFO 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 19:20:29,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:20:29,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857291172] [2024-06-27 19:20:29,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857291172] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:20:29,092 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:20:29,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 19:20:29,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414394982] [2024-06-27 19:20:29,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:20:29,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 19:20:29,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:20:29,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 19:20:29,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 19:20:29,125 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-27 19:20:29,126 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 70 transitions, 453 flow. Second operand has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:29,126 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:20:29,126 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-27 19:20:29,126 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:20:29,261 INFO L124 PetriNetUnfolderBase]: 1000/1639 cut-off events. [2024-06-27 19:20:29,261 INFO L125 PetriNetUnfolderBase]: For 5364/5413 co-relation queries the response was YES. [2024-06-27 19:20:29,265 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6336 conditions, 1639 events. 1000/1639 cut-off events. For 5364/5413 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 8330 event pairs, 303 based on Foata normal form. 16/1637 useless extension candidates. Maximal degree in co-relation 6309. Up to 1359 conditions per place. [2024-06-27 19:20:29,272 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 57 selfloop transitions, 29 changer transitions 0/97 dead transitions. [2024-06-27 19:20:29,272 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 97 transitions, 759 flow [2024-06-27 19:20:29,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:20:29,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:20:29,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 138 transitions. [2024-06-27 19:20:29,273 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.69 [2024-06-27 19:20:29,273 INFO L175 Difference]: Start difference. First operand has 62 places, 70 transitions, 453 flow. Second operand 5 states and 138 transitions. [2024-06-27 19:20:29,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 97 transitions, 759 flow [2024-06-27 19:20:29,278 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 97 transitions, 755 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-06-27 19:20:29,279 INFO L231 Difference]: Finished difference. Result has 67 places, 74 transitions, 550 flow [2024-06-27 19:20:29,279 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=449, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=550, PETRI_PLACES=67, PETRI_TRANSITIONS=74} [2024-06-27 19:20:29,280 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 26 predicate places. [2024-06-27 19:20:29,280 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 74 transitions, 550 flow [2024-06-27 19:20:29,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:29,281 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:20:29,281 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:20:29,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 19:20:29,281 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:20:29,281 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:20:29,281 INFO L85 PathProgramCache]: Analyzing trace with hash 358598134, now seen corresponding path program 2 times [2024-06-27 19:20:29,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:20:29,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915470889] [2024-06-27 19:20:29,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:20:29,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:20:29,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:20:29,352 INFO 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 19:20:29,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:20:29,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915470889] [2024-06-27 19:20:29,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915470889] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:20:29,353 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:20:29,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 19:20:29,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619116118] [2024-06-27 19:20:29,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:20:29,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 19:20:29,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:20:29,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 19:20:29,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 19:20:29,374 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-27 19:20:29,375 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 74 transitions, 550 flow. Second operand has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:29,375 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:20:29,375 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-27 19:20:29,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:20:29,516 INFO L124 PetriNetUnfolderBase]: 1017/1664 cut-off events. [2024-06-27 19:20:29,517 INFO L125 PetriNetUnfolderBase]: For 6492/6537 co-relation queries the response was YES. [2024-06-27 19:20:29,520 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6823 conditions, 1664 events. 1017/1664 cut-off events. For 6492/6537 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 8521 event pairs, 316 based on Foata normal form. 23/1670 useless extension candidates. Maximal degree in co-relation 6793. Up to 1381 conditions per place. [2024-06-27 19:20:29,527 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 53 selfloop transitions, 32 changer transitions 0/96 dead transitions. [2024-06-27 19:20:29,527 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 96 transitions, 831 flow [2024-06-27 19:20:29,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:20:29,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:20:29,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 133 transitions. [2024-06-27 19:20:29,528 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.665 [2024-06-27 19:20:29,528 INFO L175 Difference]: Start difference. First operand has 67 places, 74 transitions, 550 flow. Second operand 5 states and 133 transitions. [2024-06-27 19:20:29,528 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 96 transitions, 831 flow [2024-06-27 19:20:29,535 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 96 transitions, 782 flow, removed 5 selfloop flow, removed 2 redundant places. [2024-06-27 19:20:29,536 INFO L231 Difference]: Finished difference. Result has 72 places, 79 transitions, 659 flow [2024-06-27 19:20:29,536 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=507, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=659, PETRI_PLACES=72, PETRI_TRANSITIONS=79} [2024-06-27 19:20:29,536 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 31 predicate places. [2024-06-27 19:20:29,537 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 79 transitions, 659 flow [2024-06-27 19:20:29,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:29,537 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:20:29,537 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:20:29,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-27 19:20:29,537 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:20:29,538 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:20:29,538 INFO L85 PathProgramCache]: Analyzing trace with hash 1712358566, now seen corresponding path program 1 times [2024-06-27 19:20:29,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:20:29,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255389200] [2024-06-27 19:20:29,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:20:29,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:20:29,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:20:29,604 INFO 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 19:20:29,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:20:29,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255389200] [2024-06-27 19:20:29,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255389200] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:20:29,604 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:20:29,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:20:29,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821800073] [2024-06-27 19:20:29,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:20:29,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:20:29,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:20:29,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:20:29,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:20:29,625 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:20:29,626 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 79 transitions, 659 flow. Second operand has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:29,626 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:20:29,626 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:20:29,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:20:29,796 INFO L124 PetriNetUnfolderBase]: 1087/1783 cut-off events. [2024-06-27 19:20:29,797 INFO L125 PetriNetUnfolderBase]: For 7878/7878 co-relation queries the response was YES. [2024-06-27 19:20:29,800 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7434 conditions, 1783 events. 1087/1783 cut-off events. For 7878/7878 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 9091 event pairs, 320 based on Foata normal form. 4/1783 useless extension candidates. Maximal degree in co-relation 7401. Up to 1505 conditions per place. [2024-06-27 19:20:29,806 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 93 selfloop transitions, 22 changer transitions 0/122 dead transitions. [2024-06-27 19:20:29,806 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 122 transitions, 1135 flow [2024-06-27 19:20:29,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:20:29,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:20:29,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 152 transitions. [2024-06-27 19:20:29,807 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6333333333333333 [2024-06-27 19:20:29,808 INFO L175 Difference]: Start difference. First operand has 72 places, 79 transitions, 659 flow. Second operand 6 states and 152 transitions. [2024-06-27 19:20:29,808 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 122 transitions, 1135 flow [2024-06-27 19:20:29,815 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 122 transitions, 1033 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-27 19:20:29,817 INFO L231 Difference]: Finished difference. Result has 76 places, 93 transitions, 763 flow [2024-06-27 19:20:29,817 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=579, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=763, PETRI_PLACES=76, PETRI_TRANSITIONS=93} [2024-06-27 19:20:29,818 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 35 predicate places. [2024-06-27 19:20:29,818 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 93 transitions, 763 flow [2024-06-27 19:20:29,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:29,818 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:20:29,818 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:20:29,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-27 19:20:29,818 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:20:29,819 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:20:29,819 INFO L85 PathProgramCache]: Analyzing trace with hash -1768122014, now seen corresponding path program 2 times [2024-06-27 19:20:29,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:20:29,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142879345] [2024-06-27 19:20:29,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:20:29,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:20:29,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:20:29,889 INFO 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 19:20:29,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:20:29,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142879345] [2024-06-27 19:20:29,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142879345] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:20:29,890 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:20:29,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:20:29,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37849382] [2024-06-27 19:20:29,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:20:29,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:20:29,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:20:29,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:20:29,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:20:29,918 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:20:29,918 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 93 transitions, 763 flow. Second operand has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:29,918 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:20:29,919 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:20:29,919 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:20:30,059 INFO L124 PetriNetUnfolderBase]: 1098/1797 cut-off events. [2024-06-27 19:20:30,060 INFO L125 PetriNetUnfolderBase]: For 9399/9399 co-relation queries the response was YES. [2024-06-27 19:20:30,064 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7902 conditions, 1797 events. 1098/1797 cut-off events. For 9399/9399 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 9120 event pairs, 334 based on Foata normal form. 2/1793 useless extension candidates. Maximal degree in co-relation 7866. Up to 1512 conditions per place. [2024-06-27 19:20:30,070 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 89 selfloop transitions, 31 changer transitions 0/127 dead transitions. [2024-06-27 19:20:30,070 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 127 transitions, 1216 flow [2024-06-27 19:20:30,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:20:30,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:20:30,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 152 transitions. [2024-06-27 19:20:30,071 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6333333333333333 [2024-06-27 19:20:30,072 INFO L175 Difference]: Start difference. First operand has 76 places, 93 transitions, 763 flow. Second operand 6 states and 152 transitions. [2024-06-27 19:20:30,072 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 127 transitions, 1216 flow [2024-06-27 19:20:30,081 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 127 transitions, 1176 flow, removed 12 selfloop flow, removed 2 redundant places. [2024-06-27 19:20:30,082 INFO L231 Difference]: Finished difference. Result has 81 places, 102 transitions, 881 flow [2024-06-27 19:20:30,083 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=729, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=881, PETRI_PLACES=81, PETRI_TRANSITIONS=102} [2024-06-27 19:20:30,083 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 40 predicate places. [2024-06-27 19:20:30,083 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 102 transitions, 881 flow [2024-06-27 19:20:30,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:30,083 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:20:30,084 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:20:30,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-27 19:20:30,084 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:20:30,084 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:20:30,084 INFO L85 PathProgramCache]: Analyzing trace with hash -274348732, now seen corresponding path program 3 times [2024-06-27 19:20:30,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:20:30,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377336646] [2024-06-27 19:20:30,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:20:30,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:20:30,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:20:30,152 INFO 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 19:20:30,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:20:30,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377336646] [2024-06-27 19:20:30,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377336646] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:20:30,153 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:20:30,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:20:30,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043120237] [2024-06-27 19:20:30,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:20:30,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:20:30,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:20:30,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:20:30,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:20:30,184 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:20:30,184 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 102 transitions, 881 flow. Second operand has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:30,184 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:20:30,184 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:20:30,184 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:20:30,329 INFO L124 PetriNetUnfolderBase]: 1093/1790 cut-off events. [2024-06-27 19:20:30,329 INFO L125 PetriNetUnfolderBase]: For 10908/10908 co-relation queries the response was YES. [2024-06-27 19:20:30,333 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8129 conditions, 1790 events. 1093/1790 cut-off events. For 10908/10908 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 9094 event pairs, 334 based on Foata normal form. 2/1786 useless extension candidates. Maximal degree in co-relation 8091. Up to 1509 conditions per place. [2024-06-27 19:20:30,339 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 88 selfloop transitions, 30 changer transitions 0/125 dead transitions. [2024-06-27 19:20:30,339 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 125 transitions, 1224 flow [2024-06-27 19:20:30,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:20:30,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:20:30,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-27 19:20:30,340 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-27 19:20:30,340 INFO L175 Difference]: Start difference. First operand has 81 places, 102 transitions, 881 flow. Second operand 6 states and 150 transitions. [2024-06-27 19:20:30,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 125 transitions, 1224 flow [2024-06-27 19:20:30,351 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 125 transitions, 1208 flow, removed 8 selfloop flow, removed 0 redundant places. [2024-06-27 19:20:30,353 INFO L231 Difference]: Finished difference. Result has 87 places, 102 transitions, 933 flow [2024-06-27 19:20:30,353 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=865, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=933, PETRI_PLACES=87, PETRI_TRANSITIONS=102} [2024-06-27 19:20:30,353 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 46 predicate places. [2024-06-27 19:20:30,353 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 102 transitions, 933 flow [2024-06-27 19:20:30,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:30,354 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:20:30,354 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:20:30,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-27 19:20:30,354 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:20:30,354 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:20:30,354 INFO L85 PathProgramCache]: Analyzing trace with hash -101612764, now seen corresponding path program 1 times [2024-06-27 19:20:30,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:20:30,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79966267] [2024-06-27 19:20:30,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:20:30,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:20:30,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:20:30,425 INFO 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 19:20:30,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:20:30,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79966267] [2024-06-27 19:20:30,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79966267] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:20:30,426 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:20:30,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:20:30,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727086189] [2024-06-27 19:20:30,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:20:30,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:20:30,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:20:30,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:20:30,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:20:30,452 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:20:30,452 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 102 transitions, 933 flow. Second operand has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:30,452 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:20:30,452 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:20:30,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:20:30,615 INFO L124 PetriNetUnfolderBase]: 1085/1783 cut-off events. [2024-06-27 19:20:30,615 INFO L125 PetriNetUnfolderBase]: For 12094/12094 co-relation queries the response was YES. [2024-06-27 19:20:30,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8296 conditions, 1783 events. 1085/1783 cut-off events. For 12094/12094 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 9052 event pairs, 298 based on Foata normal form. 4/1786 useless extension candidates. Maximal degree in co-relation 8255. Up to 1612 conditions per place. [2024-06-27 19:20:30,625 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 105 selfloop transitions, 12 changer transitions 0/124 dead transitions. [2024-06-27 19:20:30,625 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 124 transitions, 1229 flow [2024-06-27 19:20:30,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:20:30,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:20:30,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 140 transitions. [2024-06-27 19:20:30,626 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-06-27 19:20:30,627 INFO L175 Difference]: Start difference. First operand has 87 places, 102 transitions, 933 flow. Second operand 6 states and 140 transitions. [2024-06-27 19:20:30,627 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 124 transitions, 1229 flow [2024-06-27 19:20:30,640 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 124 transitions, 1164 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-27 19:20:30,641 INFO L231 Difference]: Finished difference. Result has 89 places, 104 transitions, 915 flow [2024-06-27 19:20:30,641 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=868, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=915, PETRI_PLACES=89, PETRI_TRANSITIONS=104} [2024-06-27 19:20:30,642 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 48 predicate places. [2024-06-27 19:20:30,642 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 104 transitions, 915 flow [2024-06-27 19:20:30,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:30,642 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:20:30,642 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:20:30,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-27 19:20:30,643 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:20:30,643 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:20:30,643 INFO L85 PathProgramCache]: Analyzing trace with hash -58766246, now seen corresponding path program 1 times [2024-06-27 19:20:30,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:20:30,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195752347] [2024-06-27 19:20:30,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:20:30,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:20:30,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:20:30,705 INFO 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 19:20:30,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:20:30,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195752347] [2024-06-27 19:20:30,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195752347] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:20:30,705 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:20:30,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:20:30,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043709621] [2024-06-27 19:20:30,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:20:30,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:20:30,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:20:30,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:20:30,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:20:30,733 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:20:30,733 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 104 transitions, 915 flow. Second operand has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:30,733 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:20:30,733 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:20:30,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:20:30,910 INFO L124 PetriNetUnfolderBase]: 1112/1832 cut-off events. [2024-06-27 19:20:30,910 INFO L125 PetriNetUnfolderBase]: For 13574/13574 co-relation queries the response was YES. [2024-06-27 19:20:30,916 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8641 conditions, 1832 events. 1112/1832 cut-off events. For 13574/13574 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 9395 event pairs, 316 based on Foata normal form. 2/1830 useless extension candidates. Maximal degree in co-relation 8599. Up to 1526 conditions per place. [2024-06-27 19:20:30,923 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 98 selfloop transitions, 33 changer transitions 0/138 dead transitions. [2024-06-27 19:20:30,924 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 138 transitions, 1402 flow [2024-06-27 19:20:30,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:20:30,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:20:30,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-06-27 19:20:30,925 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6375 [2024-06-27 19:20:30,925 INFO L175 Difference]: Start difference. First operand has 89 places, 104 transitions, 915 flow. Second operand 6 states and 153 transitions. [2024-06-27 19:20:30,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 138 transitions, 1402 flow [2024-06-27 19:20:30,938 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 138 transitions, 1373 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-27 19:20:30,940 INFO L231 Difference]: Finished difference. Result has 92 places, 111 transitions, 1035 flow [2024-06-27 19:20:30,940 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=886, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1035, PETRI_PLACES=92, PETRI_TRANSITIONS=111} [2024-06-27 19:20:30,941 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 51 predicate places. [2024-06-27 19:20:30,941 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 111 transitions, 1035 flow [2024-06-27 19:20:30,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:30,941 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:20:30,942 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:20:30,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-27 19:20:30,942 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:20:30,942 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:20:30,942 INFO L85 PathProgramCache]: Analyzing trace with hash -58771826, now seen corresponding path program 2 times [2024-06-27 19:20:30,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:20:30,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344193322] [2024-06-27 19:20:30,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:20:30,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:20:30,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:20:31,005 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:20:31,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:20:31,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344193322] [2024-06-27 19:20:31,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344193322] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:20:31,005 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:20:31,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:20:31,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660082815] [2024-06-27 19:20:31,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:20:31,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:20:31,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:20:31,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:20:31,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:20:31,028 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:20:31,028 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 111 transitions, 1035 flow. Second operand has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:31,028 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:20:31,028 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:20:31,028 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:20:31,178 INFO L124 PetriNetUnfolderBase]: 1107/1825 cut-off events. [2024-06-27 19:20:31,178 INFO L125 PetriNetUnfolderBase]: For 15130/15130 co-relation queries the response was YES. [2024-06-27 19:20:31,183 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8877 conditions, 1825 events. 1107/1825 cut-off events. For 15130/15130 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 9339 event pairs, 316 based on Foata normal form. 2/1823 useless extension candidates. Maximal degree in co-relation 8833. Up to 1521 conditions per place. [2024-06-27 19:20:31,190 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 96 selfloop transitions, 37 changer transitions 0/140 dead transitions. [2024-06-27 19:20:31,190 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 140 transitions, 1439 flow [2024-06-27 19:20:31,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:20:31,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:20:31,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 155 transitions. [2024-06-27 19:20:31,191 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6458333333333334 [2024-06-27 19:20:31,191 INFO L175 Difference]: Start difference. First operand has 92 places, 111 transitions, 1035 flow. Second operand 6 states and 155 transitions. [2024-06-27 19:20:31,191 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 140 transitions, 1439 flow [2024-06-27 19:20:31,206 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 140 transitions, 1397 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-27 19:20:31,208 INFO L231 Difference]: Finished difference. Result has 97 places, 113 transitions, 1116 flow [2024-06-27 19:20:31,208 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=994, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1116, PETRI_PLACES=97, PETRI_TRANSITIONS=113} [2024-06-27 19:20:31,209 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 56 predicate places. [2024-06-27 19:20:31,209 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 113 transitions, 1116 flow [2024-06-27 19:20:31,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:31,209 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:20:31,209 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:20:31,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-27 19:20:31,210 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:20:31,210 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:20:31,210 INFO L85 PathProgramCache]: Analyzing trace with hash 1022792798, now seen corresponding path program 3 times [2024-06-27 19:20:31,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:20:31,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529353391] [2024-06-27 19:20:31,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:20:31,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:20:31,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:20:31,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:20:31,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:20:31,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529353391] [2024-06-27 19:20:31,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529353391] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:20:31,273 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:20:31,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:20:31,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908601221] [2024-06-27 19:20:31,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:20:31,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:20:31,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:20:31,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:20:31,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:20:31,296 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:20:31,296 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 113 transitions, 1116 flow. Second operand has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:31,296 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:20:31,296 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:20:31,296 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:20:31,442 INFO L124 PetriNetUnfolderBase]: 1102/1821 cut-off events. [2024-06-27 19:20:31,442 INFO L125 PetriNetUnfolderBase]: For 17664/17667 co-relation queries the response was YES. [2024-06-27 19:20:31,448 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9067 conditions, 1821 events. 1102/1821 cut-off events. For 17664/17667 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 9338 event pairs, 342 based on Foata normal form. 4/1817 useless extension candidates. Maximal degree in co-relation 9021. Up to 1516 conditions per place. [2024-06-27 19:20:31,454 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 93 selfloop transitions, 33 changer transitions 0/133 dead transitions. [2024-06-27 19:20:31,454 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 133 transitions, 1427 flow [2024-06-27 19:20:31,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:20:31,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:20:31,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 145 transitions. [2024-06-27 19:20:31,455 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6041666666666666 [2024-06-27 19:20:31,456 INFO L175 Difference]: Start difference. First operand has 97 places, 113 transitions, 1116 flow. Second operand 6 states and 145 transitions. [2024-06-27 19:20:31,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 133 transitions, 1427 flow [2024-06-27 19:20:31,472 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 133 transitions, 1377 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-06-27 19:20:31,474 INFO L231 Difference]: Finished difference. Result has 100 places, 114 transitions, 1151 flow [2024-06-27 19:20:31,474 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1067, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1151, PETRI_PLACES=100, PETRI_TRANSITIONS=114} [2024-06-27 19:20:31,475 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 59 predicate places. [2024-06-27 19:20:31,475 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 114 transitions, 1151 flow [2024-06-27 19:20:31,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:31,475 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:20:31,475 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:20:31,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-27 19:20:31,475 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:20:31,476 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:20:31,476 INFO L85 PathProgramCache]: Analyzing trace with hash -2118063951, now seen corresponding path program 1 times [2024-06-27 19:20:31,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:20:31,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247482702] [2024-06-27 19:20:31,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:20:31,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:20:31,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:20:31,539 INFO 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 19:20:31,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:20:31,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247482702] [2024-06-27 19:20:31,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247482702] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:20:31,540 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:20:31,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 19:20:31,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614059604] [2024-06-27 19:20:31,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:20:31,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 19:20:31,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:20:31,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 19:20:31,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 19:20:31,562 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:20:31,562 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 114 transitions, 1151 flow. Second operand has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:31,562 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:20:31,562 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:20:31,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:20:31,706 INFO L124 PetriNetUnfolderBase]: 1078/1764 cut-off events. [2024-06-27 19:20:31,706 INFO L125 PetriNetUnfolderBase]: For 17966/17973 co-relation queries the response was YES. [2024-06-27 19:20:31,712 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8979 conditions, 1764 events. 1078/1764 cut-off events. For 17966/17973 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 8883 event pairs, 314 based on Foata normal form. 8/1770 useless extension candidates. Maximal degree in co-relation 8932. Up to 1603 conditions per place. [2024-06-27 19:20:31,717 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 101 selfloop transitions, 14 changer transitions 0/122 dead transitions. [2024-06-27 19:20:31,717 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 122 transitions, 1401 flow [2024-06-27 19:20:31,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 19:20:31,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 19:20:31,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 98 transitions. [2024-06-27 19:20:31,718 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6125 [2024-06-27 19:20:31,718 INFO L175 Difference]: Start difference. First operand has 100 places, 114 transitions, 1151 flow. Second operand 4 states and 98 transitions. [2024-06-27 19:20:31,719 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 122 transitions, 1401 flow [2024-06-27 19:20:31,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 122 transitions, 1350 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-06-27 19:20:31,738 INFO L231 Difference]: Finished difference. Result has 101 places, 114 transitions, 1136 flow [2024-06-27 19:20:31,739 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1100, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1136, PETRI_PLACES=101, PETRI_TRANSITIONS=114} [2024-06-27 19:20:31,739 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 60 predicate places. [2024-06-27 19:20:31,739 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 114 transitions, 1136 flow [2024-06-27 19:20:31,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:31,739 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:20:31,740 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:20:31,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-27 19:20:31,740 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:20:31,740 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:20:31,740 INFO L85 PathProgramCache]: Analyzing trace with hash -1228387191, now seen corresponding path program 1 times [2024-06-27 19:20:31,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:20:31,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739600373] [2024-06-27 19:20:31,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:20:31,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:20:31,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:20:31,809 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 19:20:31,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:20:31,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739600373] [2024-06-27 19:20:31,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739600373] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:20:31,809 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:20:31,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:20:31,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124546302] [2024-06-27 19:20:31,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:20:31,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:20:31,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:20:31,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:20:31,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:20:31,842 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-27 19:20:31,843 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 114 transitions, 1136 flow. Second operand has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:31,843 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:20:31,843 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-27 19:20:31,843 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:20:32,061 INFO L124 PetriNetUnfolderBase]: 1201/1965 cut-off events. [2024-06-27 19:20:32,061 INFO L125 PetriNetUnfolderBase]: For 26241/26249 co-relation queries the response was YES. [2024-06-27 19:20:32,067 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10169 conditions, 1965 events. 1201/1965 cut-off events. For 26241/26249 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 10342 event pairs, 207 based on Foata normal form. 20/1930 useless extension candidates. Maximal degree in co-relation 10120. Up to 1241 conditions per place. [2024-06-27 19:20:32,073 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 89 selfloop transitions, 43 changer transitions 0/154 dead transitions. [2024-06-27 19:20:32,073 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 154 transitions, 1664 flow [2024-06-27 19:20:32,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:20:32,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:20:32,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 167 transitions. [2024-06-27 19:20:32,074 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6958333333333333 [2024-06-27 19:20:32,074 INFO L175 Difference]: Start difference. First operand has 101 places, 114 transitions, 1136 flow. Second operand 6 states and 167 transitions. [2024-06-27 19:20:32,075 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 154 transitions, 1664 flow [2024-06-27 19:20:32,099 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 154 transitions, 1628 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-27 19:20:32,101 INFO L231 Difference]: Finished difference. Result has 105 places, 120 transitions, 1282 flow [2024-06-27 19:20:32,101 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1100, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1282, PETRI_PLACES=105, PETRI_TRANSITIONS=120} [2024-06-27 19:20:32,101 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 64 predicate places. [2024-06-27 19:20:32,102 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 120 transitions, 1282 flow [2024-06-27 19:20:32,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:32,102 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:20:32,102 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:20:32,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-27 19:20:32,102 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:20:32,103 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:20:32,103 INFO L85 PathProgramCache]: Analyzing trace with hash -794688431, now seen corresponding path program 2 times [2024-06-27 19:20:32,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:20:32,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303792844] [2024-06-27 19:20:32,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:20:32,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:20:32,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:20:32,169 INFO 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 19:20:32,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:20:32,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303792844] [2024-06-27 19:20:32,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303792844] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:20:32,169 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:20:32,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:20:32,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071850354] [2024-06-27 19:20:32,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:20:32,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:20:32,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:20:32,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:20:32,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:20:32,194 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-27 19:20:32,194 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 120 transitions, 1282 flow. Second operand has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:32,194 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:20:32,194 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-27 19:20:32,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:20:32,384 INFO L124 PetriNetUnfolderBase]: 1212/1981 cut-off events. [2024-06-27 19:20:32,384 INFO L125 PetriNetUnfolderBase]: For 29894/29909 co-relation queries the response was YES. [2024-06-27 19:20:32,391 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10954 conditions, 1981 events. 1212/1981 cut-off events. For 29894/29909 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 10468 event pairs, 310 based on Foata normal form. 18/1943 useless extension candidates. Maximal degree in co-relation 10904. Up to 1586 conditions per place. [2024-06-27 19:20:32,397 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 84 selfloop transitions, 43 changer transitions 0/149 dead transitions. [2024-06-27 19:20:32,397 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 149 transitions, 1667 flow [2024-06-27 19:20:32,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:20:32,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:20:32,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 162 transitions. [2024-06-27 19:20:32,398 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.675 [2024-06-27 19:20:32,399 INFO L175 Difference]: Start difference. First operand has 105 places, 120 transitions, 1282 flow. Second operand 6 states and 162 transitions. [2024-06-27 19:20:32,399 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 149 transitions, 1667 flow [2024-06-27 19:20:32,450 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 149 transitions, 1599 flow, removed 12 selfloop flow, removed 2 redundant places. [2024-06-27 19:20:32,451 INFO L231 Difference]: Finished difference. Result has 109 places, 122 transitions, 1337 flow [2024-06-27 19:20:32,452 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1214, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1337, PETRI_PLACES=109, PETRI_TRANSITIONS=122} [2024-06-27 19:20:32,452 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 68 predicate places. [2024-06-27 19:20:32,452 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 122 transitions, 1337 flow [2024-06-27 19:20:32,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:32,452 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:20:32,452 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:20:32,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-27 19:20:32,453 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:20:32,453 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:20:32,453 INFO L85 PathProgramCache]: Analyzing trace with hash -679212563, now seen corresponding path program 1 times [2024-06-27 19:20:32,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:20:32,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555725089] [2024-06-27 19:20:32,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:20:32,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:20:32,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:20:32,525 INFO 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 19:20:32,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:20:32,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555725089] [2024-06-27 19:20:32,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555725089] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:20:32,526 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:20:32,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:20:32,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762851536] [2024-06-27 19:20:32,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:20:32,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:20:32,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:20:32,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:20:32,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:20:32,557 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:20:32,557 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 122 transitions, 1337 flow. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:32,557 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:20:32,557 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:20:32,557 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:20:32,765 INFO L124 PetriNetUnfolderBase]: 1339/2181 cut-off events. [2024-06-27 19:20:32,766 INFO L125 PetriNetUnfolderBase]: For 31140/31140 co-relation queries the response was YES. [2024-06-27 19:20:32,774 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11846 conditions, 2181 events. 1339/2181 cut-off events. For 31140/31140 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 11499 event pairs, 348 based on Foata normal form. 20/2197 useless extension candidates. Maximal degree in co-relation 11794. Up to 1783 conditions per place. [2024-06-27 19:20:32,781 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 110 selfloop transitions, 37 changer transitions 0/154 dead transitions. [2024-06-27 19:20:32,781 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 154 transitions, 1735 flow [2024-06-27 19:20:32,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:20:32,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:20:32,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-06-27 19:20:32,782 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6214285714285714 [2024-06-27 19:20:32,783 INFO L175 Difference]: Start difference. First operand has 109 places, 122 transitions, 1337 flow. Second operand 7 states and 174 transitions. [2024-06-27 19:20:32,783 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 154 transitions, 1735 flow [2024-06-27 19:20:32,851 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 154 transitions, 1631 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-27 19:20:32,853 INFO L231 Difference]: Finished difference. Result has 112 places, 124 transitions, 1341 flow [2024-06-27 19:20:32,853 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1233, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1341, PETRI_PLACES=112, PETRI_TRANSITIONS=124} [2024-06-27 19:20:32,853 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 71 predicate places. [2024-06-27 19:20:32,854 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 124 transitions, 1341 flow [2024-06-27 19:20:32,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:32,854 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:20:32,854 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:20:32,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-27 19:20:32,854 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:20:32,855 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:20:32,855 INFO L85 PathProgramCache]: Analyzing trace with hash 1413911875, now seen corresponding path program 2 times [2024-06-27 19:20:32,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:20:32,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272278157] [2024-06-27 19:20:32,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:20:32,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:20:32,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:20:32,934 INFO 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 19:20:32,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:20:32,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272278157] [2024-06-27 19:20:32,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272278157] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:20:32,935 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:20:32,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:20:32,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221380580] [2024-06-27 19:20:32,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:20:32,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:20:32,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:20:32,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:20:32,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:20:32,966 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:20:32,967 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 124 transitions, 1341 flow. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:32,967 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:20:32,967 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:20:32,967 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:20:33,219 INFO L124 PetriNetUnfolderBase]: 1356/2198 cut-off events. [2024-06-27 19:20:33,219 INFO L125 PetriNetUnfolderBase]: For 31718/31718 co-relation queries the response was YES. [2024-06-27 19:20:33,228 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12152 conditions, 2198 events. 1356/2198 cut-off events. For 31718/31718 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 11547 event pairs, 374 based on Foata normal form. 4/2195 useless extension candidates. Maximal degree in co-relation 12099. Up to 1902 conditions per place. [2024-06-27 19:20:33,235 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 103 selfloop transitions, 40 changer transitions 0/150 dead transitions. [2024-06-27 19:20:33,235 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 150 transitions, 1713 flow [2024-06-27 19:20:33,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:20:33,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:20:33,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-06-27 19:20:33,236 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6035714285714285 [2024-06-27 19:20:33,236 INFO L175 Difference]: Start difference. First operand has 112 places, 124 transitions, 1341 flow. Second operand 7 states and 169 transitions. [2024-06-27 19:20:33,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 150 transitions, 1713 flow [2024-06-27 19:20:33,273 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 150 transitions, 1627 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-27 19:20:33,275 INFO L231 Difference]: Finished difference. Result has 114 places, 126 transitions, 1372 flow [2024-06-27 19:20:33,275 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1255, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1372, PETRI_PLACES=114, PETRI_TRANSITIONS=126} [2024-06-27 19:20:33,276 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 73 predicate places. [2024-06-27 19:20:33,276 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 126 transitions, 1372 flow [2024-06-27 19:20:33,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:33,276 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:20:33,276 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:20:33,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-27 19:20:33,276 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:20:33,277 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:20:33,277 INFO L85 PathProgramCache]: Analyzing trace with hash -813502781, now seen corresponding path program 3 times [2024-06-27 19:20:33,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:20:33,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361482581] [2024-06-27 19:20:33,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:20:33,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:20:33,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:20:33,346 INFO 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 19:20:33,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:20:33,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361482581] [2024-06-27 19:20:33,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361482581] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:20:33,346 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:20:33,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:20:33,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430804483] [2024-06-27 19:20:33,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:20:33,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:20:33,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:20:33,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:20:33,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:20:33,370 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:20:33,371 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 126 transitions, 1372 flow. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:33,371 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:20:33,371 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:20:33,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:20:33,616 INFO L124 PetriNetUnfolderBase]: 1373/2225 cut-off events. [2024-06-27 19:20:33,617 INFO L125 PetriNetUnfolderBase]: For 34729/34729 co-relation queries the response was YES. [2024-06-27 19:20:33,624 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12492 conditions, 2225 events. 1373/2225 cut-off events. For 34729/34729 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 11747 event pairs, 379 based on Foata normal form. 4/2222 useless extension candidates. Maximal degree in co-relation 12438. Up to 1929 conditions per place. [2024-06-27 19:20:33,631 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 104 selfloop transitions, 41 changer transitions 0/152 dead transitions. [2024-06-27 19:20:33,631 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 152 transitions, 1752 flow [2024-06-27 19:20:33,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:20:33,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:20:33,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-06-27 19:20:33,632 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6035714285714285 [2024-06-27 19:20:33,633 INFO L175 Difference]: Start difference. First operand has 114 places, 126 transitions, 1372 flow. Second operand 7 states and 169 transitions. [2024-06-27 19:20:33,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 152 transitions, 1752 flow [2024-06-27 19:20:33,674 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 152 transitions, 1653 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-27 19:20:33,676 INFO L231 Difference]: Finished difference. Result has 116 places, 128 transitions, 1396 flow [2024-06-27 19:20:33,676 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1273, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1396, PETRI_PLACES=116, PETRI_TRANSITIONS=128} [2024-06-27 19:20:33,676 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 75 predicate places. [2024-06-27 19:20:33,676 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 128 transitions, 1396 flow [2024-06-27 19:20:33,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:33,677 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:20:33,677 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:20:33,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-27 19:20:33,677 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:20:33,677 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:20:33,677 INFO L85 PathProgramCache]: Analyzing trace with hash -813263771, now seen corresponding path program 4 times [2024-06-27 19:20:33,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:20:33,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887717701] [2024-06-27 19:20:33,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:20:33,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:20:33,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:20:33,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:20:33,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:20:33,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887717701] [2024-06-27 19:20:33,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887717701] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:20:33,745 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:20:33,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:20:33,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818409003] [2024-06-27 19:20:33,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:20:33,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:20:33,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:20:33,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:20:33,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:20:33,771 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:20:33,771 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 128 transitions, 1396 flow. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:33,772 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:20:33,772 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:20:33,772 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:20:33,997 INFO L124 PetriNetUnfolderBase]: 1365/2221 cut-off events. [2024-06-27 19:20:33,997 INFO L125 PetriNetUnfolderBase]: For 36545/36545 co-relation queries the response was YES. [2024-06-27 19:20:34,005 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12527 conditions, 2221 events. 1365/2221 cut-off events. For 36545/36545 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 11715 event pairs, 336 based on Foata normal form. 4/2218 useless extension candidates. Maximal degree in co-relation 12472. Up to 1748 conditions per place. [2024-06-27 19:20:34,011 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 103 selfloop transitions, 48 changer transitions 0/158 dead transitions. [2024-06-27 19:20:34,011 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 158 transitions, 1808 flow [2024-06-27 19:20:34,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:20:34,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:20:34,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-27 19:20:34,024 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6178571428571429 [2024-06-27 19:20:34,024 INFO L175 Difference]: Start difference. First operand has 116 places, 128 transitions, 1396 flow. Second operand 7 states and 173 transitions. [2024-06-27 19:20:34,024 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 158 transitions, 1808 flow [2024-06-27 19:20:34,063 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 158 transitions, 1703 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-27 19:20:34,065 INFO L231 Difference]: Finished difference. Result has 118 places, 130 transitions, 1432 flow [2024-06-27 19:20:34,065 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1291, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1432, PETRI_PLACES=118, PETRI_TRANSITIONS=130} [2024-06-27 19:20:34,066 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 77 predicate places. [2024-06-27 19:20:34,066 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 130 transitions, 1432 flow [2024-06-27 19:20:34,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:34,066 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:20:34,066 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:20:34,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-27 19:20:34,067 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:20:34,067 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:20:34,067 INFO L85 PathProgramCache]: Analyzing trace with hash -1021554729, now seen corresponding path program 1 times [2024-06-27 19:20:34,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:20:34,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885624493] [2024-06-27 19:20:34,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:20:34,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:20:34,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:20:34,141 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 19:20:34,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:20:34,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885624493] [2024-06-27 19:20:34,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885624493] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:20:34,142 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:20:34,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:20:34,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984888203] [2024-06-27 19:20:34,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:20:34,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:20:34,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:20:34,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:20:34,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:20:34,182 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:20:34,182 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 130 transitions, 1432 flow. Second operand has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:34,182 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:20:34,182 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:20:34,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:20:34,405 INFO L124 PetriNetUnfolderBase]: 1467/2417 cut-off events. [2024-06-27 19:20:34,405 INFO L125 PetriNetUnfolderBase]: For 44271/44271 co-relation queries the response was YES. [2024-06-27 19:20:34,413 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13609 conditions, 2417 events. 1467/2417 cut-off events. For 44271/44271 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 13207 event pairs, 291 based on Foata normal form. 12/2425 useless extension candidates. Maximal degree in co-relation 13553. Up to 1607 conditions per place. [2024-06-27 19:20:34,420 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 128 selfloop transitions, 38 changer transitions 0/173 dead transitions. [2024-06-27 19:20:34,420 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 173 transitions, 2025 flow [2024-06-27 19:20:34,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:20:34,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:20:34,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-27 19:20:34,421 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6321428571428571 [2024-06-27 19:20:34,421 INFO L175 Difference]: Start difference. First operand has 118 places, 130 transitions, 1432 flow. Second operand 7 states and 177 transitions. [2024-06-27 19:20:34,421 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 173 transitions, 2025 flow [2024-06-27 19:20:34,468 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 173 transitions, 1902 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-27 19:20:34,470 INFO L231 Difference]: Finished difference. Result has 122 places, 135 transitions, 1476 flow [2024-06-27 19:20:34,470 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1309, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1476, PETRI_PLACES=122, PETRI_TRANSITIONS=135} [2024-06-27 19:20:34,471 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 81 predicate places. [2024-06-27 19:20:34,471 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 135 transitions, 1476 flow [2024-06-27 19:20:34,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:34,471 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:20:34,471 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:20:34,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-27 19:20:34,471 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:20:34,471 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:20:34,471 INFO L85 PathProgramCache]: Analyzing trace with hash 1047771175, now seen corresponding path program 2 times [2024-06-27 19:20:34,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:20:34,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533973930] [2024-06-27 19:20:34,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:20:34,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:20:34,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:20:34,543 INFO 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 19:20:34,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:20:34,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533973930] [2024-06-27 19:20:34,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533973930] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:20:34,544 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:20:34,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:20:34,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451457191] [2024-06-27 19:20:34,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:20:34,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:20:34,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:20:34,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:20:34,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:20:34,580 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:20:34,580 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 135 transitions, 1476 flow. Second operand has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:34,580 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:20:34,580 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:20:34,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:20:34,862 INFO L124 PetriNetUnfolderBase]: 1508/2506 cut-off events. [2024-06-27 19:20:34,862 INFO L125 PetriNetUnfolderBase]: For 47633/47633 co-relation queries the response was YES. [2024-06-27 19:20:34,871 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14065 conditions, 2506 events. 1508/2506 cut-off events. For 47633/47633 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 13954 event pairs, 379 based on Foata normal form. 12/2514 useless extension candidates. Maximal degree in co-relation 14006. Up to 1983 conditions per place. [2024-06-27 19:20:34,878 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 125 selfloop transitions, 39 changer transitions 0/171 dead transitions. [2024-06-27 19:20:34,879 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 171 transitions, 1939 flow [2024-06-27 19:20:34,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:20:34,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:20:34,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-27 19:20:34,880 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6285714285714286 [2024-06-27 19:20:34,880 INFO L175 Difference]: Start difference. First operand has 122 places, 135 transitions, 1476 flow. Second operand 7 states and 176 transitions. [2024-06-27 19:20:34,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 171 transitions, 1939 flow [2024-06-27 19:20:34,938 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 171 transitions, 1880 flow, removed 13 selfloop flow, removed 2 redundant places. [2024-06-27 19:20:34,940 INFO L231 Difference]: Finished difference. Result has 128 places, 138 transitions, 1555 flow [2024-06-27 19:20:34,940 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1417, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1555, PETRI_PLACES=128, PETRI_TRANSITIONS=138} [2024-06-27 19:20:34,941 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 87 predicate places. [2024-06-27 19:20:34,941 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 138 transitions, 1555 flow [2024-06-27 19:20:34,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:34,941 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:20:34,941 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:20:34,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-27 19:20:34,941 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:20:34,942 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:20:34,942 INFO L85 PathProgramCache]: Analyzing trace with hash -645284497, now seen corresponding path program 3 times [2024-06-27 19:20:34,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:20:34,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113364614] [2024-06-27 19:20:34,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:20:34,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:20:34,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:20:35,020 INFO 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 19:20:35,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:20:35,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113364614] [2024-06-27 19:20:35,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113364614] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:20:35,021 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:20:35,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:20:35,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024784733] [2024-06-27 19:20:35,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:20:35,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:20:35,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:20:35,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:20:35,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:20:35,065 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:20:35,065 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 138 transitions, 1555 flow. Second operand has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:35,066 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:20:35,066 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:20:35,066 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:20:35,387 INFO L124 PetriNetUnfolderBase]: 1610/2690 cut-off events. [2024-06-27 19:20:35,387 INFO L125 PetriNetUnfolderBase]: For 55768/55768 co-relation queries the response was YES. [2024-06-27 19:20:35,396 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15377 conditions, 2690 events. 1610/2690 cut-off events. For 55768/55768 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 15321 event pairs, 344 based on Foata normal form. 12/2698 useless extension candidates. Maximal degree in co-relation 15315. Up to 2089 conditions per place. [2024-06-27 19:20:35,401 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 131 selfloop transitions, 41 changer transitions 0/179 dead transitions. [2024-06-27 19:20:35,402 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 179 transitions, 2144 flow [2024-06-27 19:20:35,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:20:35,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:20:35,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-27 19:20:35,403 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6464285714285715 [2024-06-27 19:20:35,403 INFO L175 Difference]: Start difference. First operand has 128 places, 138 transitions, 1555 flow. Second operand 7 states and 181 transitions. [2024-06-27 19:20:35,403 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 179 transitions, 2144 flow [2024-06-27 19:20:35,474 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 179 transitions, 2085 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-27 19:20:35,475 INFO L231 Difference]: Finished difference. Result has 133 places, 141 transitions, 1645 flow [2024-06-27 19:20:35,476 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1496, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1645, PETRI_PLACES=133, PETRI_TRANSITIONS=141} [2024-06-27 19:20:35,476 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 92 predicate places. [2024-06-27 19:20:35,476 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 141 transitions, 1645 flow [2024-06-27 19:20:35,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:35,476 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:20:35,476 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:20:35,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-27 19:20:35,476 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:20:35,477 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:20:35,477 INFO L85 PathProgramCache]: Analyzing trace with hash -645136627, now seen corresponding path program 4 times [2024-06-27 19:20:35,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:20:35,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240080013] [2024-06-27 19:20:35,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:20:35,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:20:35,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:20:35,546 INFO 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 19:20:35,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:20:35,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240080013] [2024-06-27 19:20:35,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240080013] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:20:35,546 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:20:35,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:20:35,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980075478] [2024-06-27 19:20:35,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:20:35,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:20:35,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:20:35,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:20:35,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:20:35,598 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:20:35,598 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 141 transitions, 1645 flow. Second operand has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:35,598 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:20:35,598 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:20:35,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:20:35,917 INFO L124 PetriNetUnfolderBase]: 1668/2788 cut-off events. [2024-06-27 19:20:35,917 INFO L125 PetriNetUnfolderBase]: For 61857/61857 co-relation queries the response was YES. [2024-06-27 19:20:35,928 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16179 conditions, 2788 events. 1668/2788 cut-off events. For 61857/61857 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 16143 event pairs, 449 based on Foata normal form. 16/2800 useless extension candidates. Maximal degree in co-relation 16114. Up to 2360 conditions per place. [2024-06-27 19:20:35,936 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 129 selfloop transitions, 39 changer transitions 0/175 dead transitions. [2024-06-27 19:20:35,936 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 175 transitions, 2093 flow [2024-06-27 19:20:35,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:20:35,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:20:35,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-27 19:20:35,937 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6285714285714286 [2024-06-27 19:20:35,937 INFO L175 Difference]: Start difference. First operand has 133 places, 141 transitions, 1645 flow. Second operand 7 states and 176 transitions. [2024-06-27 19:20:35,938 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 175 transitions, 2093 flow [2024-06-27 19:20:36,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 175 transitions, 2030 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-27 19:20:36,026 INFO L231 Difference]: Finished difference. Result has 137 places, 142 transitions, 1691 flow [2024-06-27 19:20:36,026 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1584, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1691, PETRI_PLACES=137, PETRI_TRANSITIONS=142} [2024-06-27 19:20:36,026 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 96 predicate places. [2024-06-27 19:20:36,026 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 142 transitions, 1691 flow [2024-06-27 19:20:36,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:36,027 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:20:36,027 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:20:36,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-27 19:20:36,027 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:20:36,027 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:20:36,027 INFO L85 PathProgramCache]: Analyzing trace with hash -639774247, now seen corresponding path program 5 times [2024-06-27 19:20:36,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:20:36,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317704213] [2024-06-27 19:20:36,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:20:36,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:20:36,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:20:36,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:20:36,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:20:36,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317704213] [2024-06-27 19:20:36,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317704213] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:20:36,101 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:20:36,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:20:36,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597055790] [2024-06-27 19:20:36,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:20:36,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:20:36,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:20:36,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:20:36,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:20:36,132 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:20:36,132 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 142 transitions, 1691 flow. Second operand has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:36,132 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:20:36,132 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:20:36,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:20:36,483 INFO L124 PetriNetUnfolderBase]: 1726/2886 cut-off events. [2024-06-27 19:20:36,484 INFO L125 PetriNetUnfolderBase]: For 66237/66237 co-relation queries the response was YES. [2024-06-27 19:20:36,497 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16813 conditions, 2886 events. 1726/2886 cut-off events. For 66237/66237 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 16915 event pairs, 459 based on Foata normal form. 16/2898 useless extension candidates. Maximal degree in co-relation 16746. Up to 2458 conditions per place. [2024-06-27 19:20:36,507 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 130 selfloop transitions, 36 changer transitions 0/173 dead transitions. [2024-06-27 19:20:36,507 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 173 transitions, 2127 flow [2024-06-27 19:20:36,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:20:36,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:20:36,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-27 19:20:36,508 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6142857142857143 [2024-06-27 19:20:36,508 INFO L175 Difference]: Start difference. First operand has 137 places, 142 transitions, 1691 flow. Second operand 7 states and 172 transitions. [2024-06-27 19:20:36,508 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 173 transitions, 2127 flow [2024-06-27 19:20:36,596 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 173 transitions, 2058 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-27 19:20:36,598 INFO L231 Difference]: Finished difference. Result has 140 places, 143 transitions, 1725 flow [2024-06-27 19:20:36,598 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1622, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1725, PETRI_PLACES=140, PETRI_TRANSITIONS=143} [2024-06-27 19:20:36,599 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 99 predicate places. [2024-06-27 19:20:36,599 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 143 transitions, 1725 flow [2024-06-27 19:20:36,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:36,599 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:20:36,600 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:20:36,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-27 19:20:36,600 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:20:36,600 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:20:36,600 INFO L85 PathProgramCache]: Analyzing trace with hash 419247411, now seen corresponding path program 1 times [2024-06-27 19:20:36,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:20:36,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501880355] [2024-06-27 19:20:36,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:20:36,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:20:36,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:20:36,670 INFO 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 19:20:36,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:20:36,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501880355] [2024-06-27 19:20:36,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501880355] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:20:36,670 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:20:36,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:20:36,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888818545] [2024-06-27 19:20:36,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:20:36,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:20:36,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:20:36,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:20:36,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:20:36,698 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:20:36,699 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 143 transitions, 1725 flow. Second operand has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:36,699 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:20:36,699 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:20:36,699 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:20:37,058 INFO L124 PetriNetUnfolderBase]: 1767/2967 cut-off events. [2024-06-27 19:20:37,058 INFO L125 PetriNetUnfolderBase]: For 69766/69766 co-relation queries the response was YES. [2024-06-27 19:20:37,071 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17261 conditions, 2967 events. 1767/2967 cut-off events. For 69766/69766 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 17546 event pairs, 455 based on Foata normal form. 12/2975 useless extension candidates. Maximal degree in co-relation 17193. Up to 2230 conditions per place. [2024-06-27 19:20:37,080 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 130 selfloop transitions, 40 changer transitions 0/177 dead transitions. [2024-06-27 19:20:37,080 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 177 transitions, 2178 flow [2024-06-27 19:20:37,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:20:37,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:20:37,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-06-27 19:20:37,082 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6214285714285714 [2024-06-27 19:20:37,082 INFO L175 Difference]: Start difference. First operand has 140 places, 143 transitions, 1725 flow. Second operand 7 states and 174 transitions. [2024-06-27 19:20:37,082 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 177 transitions, 2178 flow [2024-06-27 19:20:37,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 177 transitions, 2097 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-27 19:20:37,167 INFO L231 Difference]: Finished difference. Result has 142 places, 144 transitions, 1754 flow [2024-06-27 19:20:37,168 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1644, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1754, PETRI_PLACES=142, PETRI_TRANSITIONS=144} [2024-06-27 19:20:37,168 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 101 predicate places. [2024-06-27 19:20:37,168 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 144 transitions, 1754 flow [2024-06-27 19:20:37,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:37,169 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:20:37,169 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:20:37,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-27 19:20:37,169 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:20:37,169 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:20:37,169 INFO L85 PathProgramCache]: Analyzing trace with hash -643618595, now seen corresponding path program 6 times [2024-06-27 19:20:37,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:20:37,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066952260] [2024-06-27 19:20:37,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:20:37,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:20:37,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:20:37,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:20:37,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:20:37,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066952260] [2024-06-27 19:20:37,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066952260] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:20:37,241 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:20:37,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:20:37,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491045175] [2024-06-27 19:20:37,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:20:37,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:20:37,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:20:37,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:20:37,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:20:37,290 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:20:37,290 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 144 transitions, 1754 flow. Second operand has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:37,291 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:20:37,291 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:20:37,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:20:37,597 INFO L124 PetriNetUnfolderBase]: 1739/2926 cut-off events. [2024-06-27 19:20:37,598 INFO L125 PetriNetUnfolderBase]: For 70283/70286 co-relation queries the response was YES. [2024-06-27 19:20:37,610 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16776 conditions, 2926 events. 1739/2926 cut-off events. For 70283/70286 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 17299 event pairs, 484 based on Foata normal form. 18/2936 useless extension candidates. Maximal degree in co-relation 16707. Up to 2485 conditions per place. [2024-06-27 19:20:37,619 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 131 selfloop transitions, 34 changer transitions 0/172 dead transitions. [2024-06-27 19:20:37,619 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 172 transitions, 2182 flow [2024-06-27 19:20:37,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:20:37,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:20:37,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-27 19:20:37,620 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-27 19:20:37,621 INFO L175 Difference]: Start difference. First operand has 142 places, 144 transitions, 1754 flow. Second operand 7 states and 168 transitions. [2024-06-27 19:20:37,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 172 transitions, 2182 flow [2024-06-27 19:20:37,750 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 172 transitions, 2071 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-27 19:20:37,752 INFO L231 Difference]: Finished difference. Result has 144 places, 145 transitions, 1744 flow [2024-06-27 19:20:37,752 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1653, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1744, PETRI_PLACES=144, PETRI_TRANSITIONS=145} [2024-06-27 19:20:37,753 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 103 predicate places. [2024-06-27 19:20:37,753 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 145 transitions, 1744 flow [2024-06-27 19:20:37,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:37,753 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:20:37,753 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:20:37,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-27 19:20:37,754 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:20:37,754 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:20:37,754 INFO L85 PathProgramCache]: Analyzing trace with hash -643403393, now seen corresponding path program 2 times [2024-06-27 19:20:37,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:20:37,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370602443] [2024-06-27 19:20:37,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:20:37,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:20:37,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:20:37,823 INFO 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 19:20:37,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:20:37,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370602443] [2024-06-27 19:20:37,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370602443] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:20:37,824 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:20:37,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:20:37,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874948663] [2024-06-27 19:20:37,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:20:37,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:20:37,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:20:37,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:20:37,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:20:37,856 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:20:37,857 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 145 transitions, 1744 flow. Second operand has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:37,857 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:20:37,857 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:20:37,857 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:20:38,182 INFO L124 PetriNetUnfolderBase]: 1719/2894 cut-off events. [2024-06-27 19:20:38,183 INFO L125 PetriNetUnfolderBase]: For 66163/66166 co-relation queries the response was YES. [2024-06-27 19:20:38,195 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16191 conditions, 2894 events. 1719/2894 cut-off events. For 66163/66166 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 17045 event pairs, 455 based on Foata normal form. 14/2900 useless extension candidates. Maximal degree in co-relation 16121. Up to 2366 conditions per place. [2024-06-27 19:20:38,203 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 132 selfloop transitions, 36 changer transitions 0/175 dead transitions. [2024-06-27 19:20:38,203 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 175 transitions, 2164 flow [2024-06-27 19:20:38,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:20:38,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:20:38,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-27 19:20:38,204 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6107142857142858 [2024-06-27 19:20:38,204 INFO L175 Difference]: Start difference. First operand has 144 places, 145 transitions, 1744 flow. Second operand 7 states and 171 transitions. [2024-06-27 19:20:38,205 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 175 transitions, 2164 flow [2024-06-27 19:20:38,311 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 175 transitions, 2091 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-27 19:20:38,313 INFO L231 Difference]: Finished difference. Result has 146 places, 145 transitions, 1749 flow [2024-06-27 19:20:38,314 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1671, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1749, PETRI_PLACES=146, PETRI_TRANSITIONS=145} [2024-06-27 19:20:38,314 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 105 predicate places. [2024-06-27 19:20:38,314 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 145 transitions, 1749 flow [2024-06-27 19:20:38,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:38,314 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:20:38,315 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:20:38,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-27 19:20:38,315 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:20:38,315 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:20:38,315 INFO L85 PathProgramCache]: Analyzing trace with hash 1976433955, now seen corresponding path program 3 times [2024-06-27 19:20:38,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:20:38,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995168280] [2024-06-27 19:20:38,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:20:38,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:20:38,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:20:38,377 INFO 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 19:20:38,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:20:38,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995168280] [2024-06-27 19:20:38,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995168280] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:20:38,378 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:20:38,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:20:38,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564682142] [2024-06-27 19:20:38,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:20:38,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:20:38,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:20:38,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:20:38,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:20:38,415 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:20:38,416 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 145 transitions, 1749 flow. Second operand has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:38,416 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:20:38,416 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:20:38,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:20:38,714 INFO L124 PetriNetUnfolderBase]: 1699/2862 cut-off events. [2024-06-27 19:20:38,714 INFO L125 PetriNetUnfolderBase]: For 64399/64402 co-relation queries the response was YES. [2024-06-27 19:20:38,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15828 conditions, 2862 events. 1699/2862 cut-off events. For 64399/64402 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 16761 event pairs, 400 based on Foata normal form. 14/2868 useless extension candidates. Maximal degree in co-relation 15757. Up to 1833 conditions per place. [2024-06-27 19:20:38,734 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 124 selfloop transitions, 44 changer transitions 0/175 dead transitions. [2024-06-27 19:20:38,734 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 175 transitions, 2111 flow [2024-06-27 19:20:38,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:20:38,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:20:38,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-27 19:20:38,735 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6071428571428571 [2024-06-27 19:20:38,735 INFO L175 Difference]: Start difference. First operand has 146 places, 145 transitions, 1749 flow. Second operand 7 states and 170 transitions. [2024-06-27 19:20:38,735 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 175 transitions, 2111 flow [2024-06-27 19:20:38,831 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 175 transitions, 1950 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-27 19:20:38,833 INFO L231 Difference]: Finished difference. Result has 144 places, 144 transitions, 1620 flow [2024-06-27 19:20:38,834 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1528, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1620, PETRI_PLACES=144, PETRI_TRANSITIONS=144} [2024-06-27 19:20:38,834 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 103 predicate places. [2024-06-27 19:20:38,834 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 144 transitions, 1620 flow [2024-06-27 19:20:38,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:38,834 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:20:38,835 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:20:38,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-27 19:20:38,835 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:20:38,835 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:20:38,835 INFO L85 PathProgramCache]: Analyzing trace with hash -1179730858, now seen corresponding path program 1 times [2024-06-27 19:20:38,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:20:38,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101751660] [2024-06-27 19:20:38,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:20:38,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:20:38,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:20:38,892 INFO 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 19:20:38,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:20:38,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101751660] [2024-06-27 19:20:38,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101751660] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:20:38,893 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:20:38,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:20:38,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375463044] [2024-06-27 19:20:38,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:20:38,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:20:38,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:20:38,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:20:38,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:20:38,931 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:20:38,932 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 144 transitions, 1620 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:38,932 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:20:38,932 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:20:38,932 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:20:39,194 INFO L124 PetriNetUnfolderBase]: 1704/2882 cut-off events. [2024-06-27 19:20:39,194 INFO L125 PetriNetUnfolderBase]: For 61433/61433 co-relation queries the response was YES. [2024-06-27 19:20:39,207 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15674 conditions, 2882 events. 1704/2882 cut-off events. For 61433/61433 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 17043 event pairs, 422 based on Foata normal form. 1/2882 useless extension candidates. Maximal degree in co-relation 15604. Up to 2644 conditions per place. [2024-06-27 19:20:39,216 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 140 selfloop transitions, 20 changer transitions 0/167 dead transitions. [2024-06-27 19:20:39,216 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 167 transitions, 2108 flow [2024-06-27 19:20:39,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:20:39,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:20:39,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 139 transitions. [2024-06-27 19:20:39,217 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5791666666666667 [2024-06-27 19:20:39,217 INFO L175 Difference]: Start difference. First operand has 144 places, 144 transitions, 1620 flow. Second operand 6 states and 139 transitions. [2024-06-27 19:20:39,217 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 167 transitions, 2108 flow [2024-06-27 19:20:39,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 167 transitions, 1994 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-27 19:20:39,303 INFO L231 Difference]: Finished difference. Result has 145 places, 150 transitions, 1622 flow [2024-06-27 19:20:39,303 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1506, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1622, PETRI_PLACES=145, PETRI_TRANSITIONS=150} [2024-06-27 19:20:39,303 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 104 predicate places. [2024-06-27 19:20:39,303 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 150 transitions, 1622 flow [2024-06-27 19:20:39,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:39,303 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:20:39,304 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:20:39,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-27 19:20:39,304 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:20:39,304 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:20:39,304 INFO L85 PathProgramCache]: Analyzing trace with hash 348397974, now seen corresponding path program 2 times [2024-06-27 19:20:39,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:20:39,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805023106] [2024-06-27 19:20:39,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:20:39,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:20:39,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:20:39,363 INFO 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 19:20:39,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:20:39,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805023106] [2024-06-27 19:20:39,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805023106] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:20:39,364 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:20:39,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:20:39,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86316148] [2024-06-27 19:20:39,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:20:39,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:20:39,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:20:39,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:20:39,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:20:39,390 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:20:39,391 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 150 transitions, 1622 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:39,391 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:20:39,391 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:20:39,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:20:39,659 INFO L124 PetriNetUnfolderBase]: 1714/2898 cut-off events. [2024-06-27 19:20:39,659 INFO L125 PetriNetUnfolderBase]: For 64714/64714 co-relation queries the response was YES. [2024-06-27 19:20:39,672 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15628 conditions, 2898 events. 1714/2898 cut-off events. For 64714/64714 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 17192 event pairs, 422 based on Foata normal form. 1/2898 useless extension candidates. Maximal degree in co-relation 15557. Up to 2670 conditions per place. [2024-06-27 19:20:39,682 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 144 selfloop transitions, 18 changer transitions 0/169 dead transitions. [2024-06-27 19:20:39,682 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 169 transitions, 2051 flow [2024-06-27 19:20:39,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:20:39,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:20:39,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 134 transitions. [2024-06-27 19:20:39,683 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5583333333333333 [2024-06-27 19:20:39,683 INFO L175 Difference]: Start difference. First operand has 145 places, 150 transitions, 1622 flow. Second operand 6 states and 134 transitions. [2024-06-27 19:20:39,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 169 transitions, 2051 flow [2024-06-27 19:20:39,777 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 169 transitions, 1997 flow, removed 19 selfloop flow, removed 2 redundant places. [2024-06-27 19:20:39,779 INFO L231 Difference]: Finished difference. Result has 149 places, 156 transitions, 1689 flow [2024-06-27 19:20:39,779 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1577, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1689, PETRI_PLACES=149, PETRI_TRANSITIONS=156} [2024-06-27 19:20:39,779 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 108 predicate places. [2024-06-27 19:20:39,779 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 156 transitions, 1689 flow [2024-06-27 19:20:39,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:39,780 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:20:39,780 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:20:39,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-27 19:20:39,780 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:20:39,780 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:20:39,781 INFO L85 PathProgramCache]: Analyzing trace with hash 177695730, now seen corresponding path program 1 times [2024-06-27 19:20:39,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:20:39,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619639520] [2024-06-27 19:20:39,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:20:39,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:20:39,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:20:39,838 INFO 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 19:20:39,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:20:39,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619639520] [2024-06-27 19:20:39,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619639520] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:20:39,839 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:20:39,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:20:39,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371536600] [2024-06-27 19:20:39,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:20:39,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:20:39,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:20:39,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:20:39,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:20:39,865 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:20:39,865 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 156 transitions, 1689 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:39,865 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:20:39,865 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:20:39,865 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:20:40,188 INFO L124 PetriNetUnfolderBase]: 1749/2944 cut-off events. [2024-06-27 19:20:40,189 INFO L125 PetriNetUnfolderBase]: For 69943/69943 co-relation queries the response was YES. [2024-06-27 19:20:40,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16042 conditions, 2944 events. 1749/2944 cut-off events. For 69943/69943 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 17389 event pairs, 445 based on Foata normal form. 3/2942 useless extension candidates. Maximal degree in co-relation 15969. Up to 2530 conditions per place. [2024-06-27 19:20:40,212 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 122 selfloop transitions, 55 changer transitions 0/184 dead transitions. [2024-06-27 19:20:40,212 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 184 transitions, 2340 flow [2024-06-27 19:20:40,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:20:40,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:20:40,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-27 19:20:40,213 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6166666666666667 [2024-06-27 19:20:40,213 INFO L175 Difference]: Start difference. First operand has 149 places, 156 transitions, 1689 flow. Second operand 6 states and 148 transitions. [2024-06-27 19:20:40,213 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 184 transitions, 2340 flow [2024-06-27 19:20:40,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 184 transitions, 2286 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-27 19:20:40,333 INFO L231 Difference]: Finished difference. Result has 153 places, 169 transitions, 1904 flow [2024-06-27 19:20:40,333 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1635, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1904, PETRI_PLACES=153, PETRI_TRANSITIONS=169} [2024-06-27 19:20:40,334 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 112 predicate places. [2024-06-27 19:20:40,334 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 169 transitions, 1904 flow [2024-06-27 19:20:40,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:40,334 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:20:40,334 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:20:40,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-27 19:20:40,335 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:20:40,335 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:20:40,335 INFO L85 PathProgramCache]: Analyzing trace with hash 1348304558, now seen corresponding path program 2 times [2024-06-27 19:20:40,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:20:40,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811982773] [2024-06-27 19:20:40,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:20:40,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:20:40,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:20:40,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:20:40,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:20:40,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811982773] [2024-06-27 19:20:40,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811982773] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:20:40,393 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:20:40,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:20:40,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938089735] [2024-06-27 19:20:40,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:20:40,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:20:40,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:20:40,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:20:40,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:20:40,416 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:20:40,416 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 169 transitions, 1904 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:40,416 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:20:40,416 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:20:40,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:20:40,713 INFO L124 PetriNetUnfolderBase]: 1766/2980 cut-off events. [2024-06-27 19:20:40,714 INFO L125 PetriNetUnfolderBase]: For 75196/75199 co-relation queries the response was YES. [2024-06-27 19:20:40,727 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16545 conditions, 2980 events. 1766/2980 cut-off events. For 75196/75199 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 17678 event pairs, 468 based on Foata normal form. 5/2977 useless extension candidates. Maximal degree in co-relation 16470. Up to 2547 conditions per place. [2024-06-27 19:20:40,736 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 126 selfloop transitions, 51 changer transitions 0/184 dead transitions. [2024-06-27 19:20:40,736 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 184 transitions, 2407 flow [2024-06-27 19:20:40,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:20:40,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:20:40,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 122 transitions. [2024-06-27 19:20:40,737 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.61 [2024-06-27 19:20:40,737 INFO L175 Difference]: Start difference. First operand has 153 places, 169 transitions, 1904 flow. Second operand 5 states and 122 transitions. [2024-06-27 19:20:40,737 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 184 transitions, 2407 flow [2024-06-27 19:20:40,857 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 184 transitions, 2326 flow, removed 9 selfloop flow, removed 2 redundant places. [2024-06-27 19:20:40,859 INFO L231 Difference]: Finished difference. Result has 156 places, 174 transitions, 1993 flow [2024-06-27 19:20:40,859 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1827, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1993, PETRI_PLACES=156, PETRI_TRANSITIONS=174} [2024-06-27 19:20:40,860 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 115 predicate places. [2024-06-27 19:20:40,860 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 174 transitions, 1993 flow [2024-06-27 19:20:40,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:40,860 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:20:40,860 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:20:40,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-27 19:20:40,861 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:20:40,861 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:20:40,861 INFO L85 PathProgramCache]: Analyzing trace with hash 1084313344, now seen corresponding path program 3 times [2024-06-27 19:20:40,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:20:40,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544072042] [2024-06-27 19:20:40,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:20:40,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:20:40,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:20:40,918 INFO 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 19:20:40,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:20:40,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544072042] [2024-06-27 19:20:40,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544072042] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:20:40,918 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:20:40,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:20:40,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426238611] [2024-06-27 19:20:40,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:20:40,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:20:40,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:20:40,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:20:40,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:20:40,947 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:20:40,947 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 174 transitions, 1993 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:40,947 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:20:40,948 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:20:40,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:20:41,260 INFO L124 PetriNetUnfolderBase]: 1743/2935 cut-off events. [2024-06-27 19:20:41,261 INFO L125 PetriNetUnfolderBase]: For 75880/75880 co-relation queries the response was YES. [2024-06-27 19:20:41,272 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16339 conditions, 2935 events. 1743/2935 cut-off events. For 75880/75880 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 17310 event pairs, 443 based on Foata normal form. 3/2933 useless extension candidates. Maximal degree in co-relation 16263. Up to 2517 conditions per place. [2024-06-27 19:20:41,279 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 120 selfloop transitions, 60 changer transitions 0/187 dead transitions. [2024-06-27 19:20:41,280 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 187 transitions, 2455 flow [2024-06-27 19:20:41,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:20:41,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:20:41,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 126 transitions. [2024-06-27 19:20:41,281 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.63 [2024-06-27 19:20:41,281 INFO L175 Difference]: Start difference. First operand has 156 places, 174 transitions, 1993 flow. Second operand 5 states and 126 transitions. [2024-06-27 19:20:41,281 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 187 transitions, 2455 flow [2024-06-27 19:20:41,414 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 187 transitions, 2341 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-27 19:20:41,416 INFO L231 Difference]: Finished difference. Result has 158 places, 174 transitions, 2017 flow [2024-06-27 19:20:41,416 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1879, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2017, PETRI_PLACES=158, PETRI_TRANSITIONS=174} [2024-06-27 19:20:41,417 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 117 predicate places. [2024-06-27 19:20:41,417 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 174 transitions, 2017 flow [2024-06-27 19:20:41,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:41,417 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:20:41,417 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:20:41,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-27 19:20:41,417 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:20:41,418 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:20:41,418 INFO L85 PathProgramCache]: Analyzing trace with hash 1084313158, now seen corresponding path program 3 times [2024-06-27 19:20:41,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:20:41,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156202008] [2024-06-27 19:20:41,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:20:41,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:20:41,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:20:41,479 INFO 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 19:20:41,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:20:41,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156202008] [2024-06-27 19:20:41,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156202008] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:20:41,479 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:20:41,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:20:41,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432016837] [2024-06-27 19:20:41,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:20:41,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:20:41,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:20:41,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:20:41,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:20:41,519 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:20:41,519 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 174 transitions, 2017 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:41,519 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:20:41,520 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:20:41,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:20:41,814 INFO L124 PetriNetUnfolderBase]: 1740/2936 cut-off events. [2024-06-27 19:20:41,814 INFO L125 PetriNetUnfolderBase]: For 76778/76778 co-relation queries the response was YES. [2024-06-27 19:20:41,828 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16461 conditions, 2936 events. 1740/2936 cut-off events. For 76778/76778 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 17370 event pairs, 416 based on Foata normal form. 1/2936 useless extension candidates. Maximal degree in co-relation 16385. Up to 2691 conditions per place. [2024-06-27 19:20:41,837 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 159 selfloop transitions, 23 changer transitions 0/189 dead transitions. [2024-06-27 19:20:41,838 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 189 transitions, 2419 flow [2024-06-27 19:20:41,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:20:41,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:20:41,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 120 transitions. [2024-06-27 19:20:41,839 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-27 19:20:41,839 INFO L175 Difference]: Start difference. First operand has 158 places, 174 transitions, 2017 flow. Second operand 5 states and 120 transitions. [2024-06-27 19:20:41,839 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 189 transitions, 2419 flow [2024-06-27 19:20:41,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 189 transitions, 2250 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-27 19:20:41,976 INFO L231 Difference]: Finished difference. Result has 159 places, 174 transitions, 1908 flow [2024-06-27 19:20:41,976 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1848, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1908, PETRI_PLACES=159, PETRI_TRANSITIONS=174} [2024-06-27 19:20:41,977 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 118 predicate places. [2024-06-27 19:20:41,977 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 174 transitions, 1908 flow [2024-06-27 19:20:41,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:41,977 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:20:41,977 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:20:41,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-27 19:20:41,977 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:20:41,978 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:20:41,978 INFO L85 PathProgramCache]: Analyzing trace with hash 1348313486, now seen corresponding path program 1 times [2024-06-27 19:20:41,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:20:41,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333503182] [2024-06-27 19:20:41,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:20:41,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:20:41,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:20:42,038 INFO 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 19:20:42,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:20:42,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333503182] [2024-06-27 19:20:42,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333503182] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:20:42,039 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:20:42,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:20:42,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007829109] [2024-06-27 19:20:42,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:20:42,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:20:42,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:20:42,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:20:42,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:20:42,083 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:20:42,083 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 174 transitions, 1908 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:42,083 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:20:42,083 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:20:42,083 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:20:42,363 INFO L124 PetriNetUnfolderBase]: 1743/2937 cut-off events. [2024-06-27 19:20:42,363 INFO L125 PetriNetUnfolderBase]: For 78044/78049 co-relation queries the response was YES. [2024-06-27 19:20:42,377 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16240 conditions, 2937 events. 1743/2937 cut-off events. For 78044/78049 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 17288 event pairs, 423 based on Foata normal form. 8/2943 useless extension candidates. Maximal degree in co-relation 16163. Up to 2685 conditions per place. [2024-06-27 19:20:42,386 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 163 selfloop transitions, 17 changer transitions 0/187 dead transitions. [2024-06-27 19:20:42,386 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 187 transitions, 2342 flow [2024-06-27 19:20:42,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:20:42,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:20:42,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 116 transitions. [2024-06-27 19:20:42,387 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.58 [2024-06-27 19:20:42,387 INFO L175 Difference]: Start difference. First operand has 159 places, 174 transitions, 1908 flow. Second operand 5 states and 116 transitions. [2024-06-27 19:20:42,387 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 187 transitions, 2342 flow [2024-06-27 19:20:42,509 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 187 transitions, 2294 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-06-27 19:20:42,511 INFO L231 Difference]: Finished difference. Result has 160 places, 177 transitions, 1956 flow [2024-06-27 19:20:42,512 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1860, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1956, PETRI_PLACES=160, PETRI_TRANSITIONS=177} [2024-06-27 19:20:42,512 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 119 predicate places. [2024-06-27 19:20:42,512 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 177 transitions, 1956 flow [2024-06-27 19:20:42,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:42,512 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:20:42,513 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 19:20:42,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-27 19:20:42,513 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:20:42,513 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:20:42,513 INFO L85 PathProgramCache]: Analyzing trace with hash 305494220, now seen corresponding path program 1 times [2024-06-27 19:20:42,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:20:42,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702680794] [2024-06-27 19:20:42,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:20:42,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:20:42,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:20:42,565 INFO 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 19:20:42,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:20:42,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702680794] [2024-06-27 19:20:42,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702680794] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:20:42,565 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:20:42,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:20:42,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698424215] [2024-06-27 19:20:42,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:20:42,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:20:42,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:20:42,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:20:42,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:20:42,589 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:20:42,589 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 177 transitions, 1956 flow. Second operand has 6 states, 6 states have (on average 16.333333333333332) internal successors, (98), 6 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:42,589 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:20:42,590 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:20:42,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:20:42,879 INFO L124 PetriNetUnfolderBase]: 1763/2965 cut-off events. [2024-06-27 19:20:42,879 INFO L125 PetriNetUnfolderBase]: For 77062/77070 co-relation queries the response was YES. [2024-06-27 19:20:42,893 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16551 conditions, 2965 events. 1763/2965 cut-off events. For 77062/77070 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 17525 event pairs, 464 based on Foata normal form. 8/2967 useless extension candidates. Maximal degree in co-relation 16473. Up to 2534 conditions per place. [2024-06-27 19:20:42,901 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 136 selfloop transitions, 59 changer transitions 0/202 dead transitions. [2024-06-27 19:20:42,901 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 202 transitions, 2547 flow [2024-06-27 19:20:42,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:20:42,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:20:42,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 146 transitions. [2024-06-27 19:20:42,902 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6083333333333333 [2024-06-27 19:20:42,902 INFO L175 Difference]: Start difference. First operand has 160 places, 177 transitions, 1956 flow. Second operand 6 states and 146 transitions. [2024-06-27 19:20:42,902 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 202 transitions, 2547 flow [2024-06-27 19:20:43,010 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 202 transitions, 2473 flow, removed 22 selfloop flow, removed 3 redundant places. [2024-06-27 19:20:43,013 INFO L231 Difference]: Finished difference. Result has 164 places, 185 transitions, 2101 flow [2024-06-27 19:20:43,013 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1882, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2101, PETRI_PLACES=164, PETRI_TRANSITIONS=185} [2024-06-27 19:20:43,013 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 123 predicate places. [2024-06-27 19:20:43,013 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 185 transitions, 2101 flow [2024-06-27 19:20:43,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.333333333333332) internal successors, (98), 6 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:43,014 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:20:43,014 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 19:20:43,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-27 19:20:43,014 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:20:43,014 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:20:43,014 INFO L85 PathProgramCache]: Analyzing trace with hash 1316619980, now seen corresponding path program 2 times [2024-06-27 19:20:43,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:20:43,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457168727] [2024-06-27 19:20:43,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:20:43,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:20:43,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:20:43,085 INFO 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 19:20:43,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:20:43,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457168727] [2024-06-27 19:20:43,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457168727] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:20:43,085 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:20:43,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:20:43,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569499564] [2024-06-27 19:20:43,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:20:43,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:20:43,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:20:43,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:20:43,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:20:43,113 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:20:43,114 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 185 transitions, 2101 flow. Second operand has 6 states, 6 states have (on average 16.333333333333332) internal successors, (98), 6 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:43,114 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:20:43,114 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:20:43,114 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:20:43,399 INFO L124 PetriNetUnfolderBase]: 1773/2983 cut-off events. [2024-06-27 19:20:43,399 INFO L125 PetriNetUnfolderBase]: For 81365/81373 co-relation queries the response was YES. [2024-06-27 19:20:43,414 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16861 conditions, 2983 events. 1773/2983 cut-off events. For 81365/81373 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 17709 event pairs, 464 based on Foata normal form. 8/2985 useless extension candidates. Maximal degree in co-relation 16781. Up to 2544 conditions per place. [2024-06-27 19:20:43,422 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 135 selfloop transitions, 63 changer transitions 0/205 dead transitions. [2024-06-27 19:20:43,422 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 205 transitions, 2664 flow [2024-06-27 19:20:43,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:20:43,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:20:43,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 127 transitions. [2024-06-27 19:20:43,423 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.635 [2024-06-27 19:20:43,423 INFO L175 Difference]: Start difference. First operand has 164 places, 185 transitions, 2101 flow. Second operand 5 states and 127 transitions. [2024-06-27 19:20:43,423 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 205 transitions, 2664 flow [2024-06-27 19:20:43,594 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 205 transitions, 2511 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-06-27 19:20:43,596 INFO L231 Difference]: Finished difference. Result has 166 places, 189 transitions, 2139 flow [2024-06-27 19:20:43,596 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1960, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2139, PETRI_PLACES=166, PETRI_TRANSITIONS=189} [2024-06-27 19:20:43,597 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 125 predicate places. [2024-06-27 19:20:43,597 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 189 transitions, 2139 flow [2024-06-27 19:20:43,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.333333333333332) internal successors, (98), 6 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:43,597 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:20:43,597 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 19:20:43,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-27 19:20:43,598 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:20:43,598 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:20:43,598 INFO L85 PathProgramCache]: Analyzing trace with hash 1316631140, now seen corresponding path program 3 times [2024-06-27 19:20:43,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:20:43,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442623142] [2024-06-27 19:20:43,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:20:43,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:20:43,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:20:43,650 INFO 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 19:20:43,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:20:43,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442623142] [2024-06-27 19:20:43,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442623142] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:20:43,651 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:20:43,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:20:43,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359127697] [2024-06-27 19:20:43,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:20:43,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:20:43,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:20:43,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:20:43,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:20:43,676 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:20:43,677 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 189 transitions, 2139 flow. Second operand has 6 states, 6 states have (on average 16.333333333333332) internal successors, (98), 6 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:43,677 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:20:43,677 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:20:43,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:20:44,004 INFO L124 PetriNetUnfolderBase]: 1765/2969 cut-off events. [2024-06-27 19:20:44,005 INFO L125 PetriNetUnfolderBase]: For 83537/83540 co-relation queries the response was YES. [2024-06-27 19:20:44,017 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16817 conditions, 2969 events. 1765/2969 cut-off events. For 83537/83540 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 17520 event pairs, 470 based on Foata normal form. 4/2965 useless extension candidates. Maximal degree in co-relation 16737. Up to 2536 conditions per place. [2024-06-27 19:20:44,024 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 129 selfloop transitions, 62 changer transitions 0/198 dead transitions. [2024-06-27 19:20:44,024 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 198 transitions, 2543 flow [2024-06-27 19:20:44,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:20:44,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:20:44,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 120 transitions. [2024-06-27 19:20:44,025 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-27 19:20:44,025 INFO L175 Difference]: Start difference. First operand has 166 places, 189 transitions, 2139 flow. Second operand 5 states and 120 transitions. [2024-06-27 19:20:44,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 198 transitions, 2543 flow [2024-06-27 19:20:44,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 198 transitions, 2432 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-27 19:20:44,173 INFO L231 Difference]: Finished difference. Result has 168 places, 189 transitions, 2162 flow [2024-06-27 19:20:44,173 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2028, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2162, PETRI_PLACES=168, PETRI_TRANSITIONS=189} [2024-06-27 19:20:44,174 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 127 predicate places. [2024-06-27 19:20:44,174 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 189 transitions, 2162 flow [2024-06-27 19:20:44,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.333333333333332) internal successors, (98), 6 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:44,174 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:20:44,174 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 19:20:44,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-27 19:20:44,174 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:20:44,175 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:20:44,175 INFO L85 PathProgramCache]: Analyzing trace with hash -1238645294, now seen corresponding path program 1 times [2024-06-27 19:20:44,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:20:44,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7255458] [2024-06-27 19:20:44,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:20:44,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:20:44,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:20:44,233 INFO 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 19:20:44,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:20:44,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7255458] [2024-06-27 19:20:44,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7255458] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:20:44,234 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:20:44,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:20:44,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091557128] [2024-06-27 19:20:44,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:20:44,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:20:44,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:20:44,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:20:44,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:20:44,262 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:20:44,262 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 189 transitions, 2162 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:44,263 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:20:44,263 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:20:44,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:20:44,567 INFO L124 PetriNetUnfolderBase]: 1824/3049 cut-off events. [2024-06-27 19:20:44,568 INFO L125 PetriNetUnfolderBase]: For 88144/88144 co-relation queries the response was YES. [2024-06-27 19:20:44,583 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17495 conditions, 3049 events. 1824/3049 cut-off events. For 88144/88144 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 18079 event pairs, 458 based on Foata normal form. 3/3045 useless extension candidates. Maximal degree in co-relation 17415. Up to 2398 conditions per place. [2024-06-27 19:20:44,592 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 126 selfloop transitions, 96 changer transitions 0/229 dead transitions. [2024-06-27 19:20:44,593 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 229 transitions, 3122 flow [2024-06-27 19:20:44,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:20:44,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:20:44,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-27 19:20:44,594 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-27 19:20:44,594 INFO L175 Difference]: Start difference. First operand has 168 places, 189 transitions, 2162 flow. Second operand 7 states and 175 transitions. [2024-06-27 19:20:44,594 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 229 transitions, 3122 flow [2024-06-27 19:20:44,762 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 229 transitions, 2944 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-27 19:20:44,765 INFO L231 Difference]: Finished difference. Result has 171 places, 206 transitions, 2399 flow [2024-06-27 19:20:44,765 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1984, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2399, PETRI_PLACES=171, PETRI_TRANSITIONS=206} [2024-06-27 19:20:44,765 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 130 predicate places. [2024-06-27 19:20:44,766 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 206 transitions, 2399 flow [2024-06-27 19:20:44,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:44,766 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:20:44,766 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 19:20:44,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-27 19:20:44,766 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:20:44,767 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:20:44,767 INFO L85 PathProgramCache]: Analyzing trace with hash 1213595534, now seen corresponding path program 2 times [2024-06-27 19:20:44,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:20:44,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430710137] [2024-06-27 19:20:44,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:20:44,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:20:44,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:20:44,850 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 19:20:44,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:20:44,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430710137] [2024-06-27 19:20:44,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430710137] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:20:44,851 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:20:44,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:20:44,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092624063] [2024-06-27 19:20:44,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:20:44,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:20:44,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:20:44,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:20:44,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:20:44,880 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:20:44,880 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 206 transitions, 2399 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:44,880 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:20:44,880 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:20:44,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:20:45,288 INFO L124 PetriNetUnfolderBase]: 1883/3155 cut-off events. [2024-06-27 19:20:45,288 INFO L125 PetriNetUnfolderBase]: For 97848/97848 co-relation queries the response was YES. [2024-06-27 19:20:45,323 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19002 conditions, 3155 events. 1883/3155 cut-off events. For 97848/97848 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 18821 event pairs, 448 based on Foata normal form. 3/3153 useless extension candidates. Maximal degree in co-relation 18920. Up to 2655 conditions per place. [2024-06-27 19:20:45,354 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 147 selfloop transitions, 78 changer transitions 0/232 dead transitions. [2024-06-27 19:20:45,354 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 232 transitions, 3123 flow [2024-06-27 19:20:45,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:20:45,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:20:45,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-27 19:20:45,355 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-27 19:20:45,355 INFO L175 Difference]: Start difference. First operand has 171 places, 206 transitions, 2399 flow. Second operand 7 states and 168 transitions. [2024-06-27 19:20:45,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 232 transitions, 3123 flow [2024-06-27 19:20:45,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 232 transitions, 2929 flow, removed 53 selfloop flow, removed 2 redundant places. [2024-06-27 19:20:45,601 INFO L231 Difference]: Finished difference. Result has 177 places, 216 transitions, 2538 flow [2024-06-27 19:20:45,602 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2225, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2538, PETRI_PLACES=177, PETRI_TRANSITIONS=216} [2024-06-27 19:20:45,602 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 136 predicate places. [2024-06-27 19:20:45,602 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 216 transitions, 2538 flow [2024-06-27 19:20:45,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:45,602 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:20:45,602 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 19:20:45,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-27 19:20:45,603 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:20:45,603 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:20:45,603 INFO L85 PathProgramCache]: Analyzing trace with hash 1213601114, now seen corresponding path program 3 times [2024-06-27 19:20:45,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:20:45,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344434708] [2024-06-27 19:20:45,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:20:45,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:20:45,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:20:45,693 INFO 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 19:20:45,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:20:45,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344434708] [2024-06-27 19:20:45,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344434708] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:20:45,694 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:20:45,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:20:45,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494982059] [2024-06-27 19:20:45,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:20:45,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:20:45,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:20:45,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:20:45,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:20:45,738 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:20:45,739 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 216 transitions, 2538 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:45,739 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:20:45,739 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:20:45,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:20:46,146 INFO L124 PetriNetUnfolderBase]: 1882/3154 cut-off events. [2024-06-27 19:20:46,146 INFO L125 PetriNetUnfolderBase]: For 100356/100356 co-relation queries the response was YES. [2024-06-27 19:20:46,164 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19050 conditions, 3154 events. 1882/3154 cut-off events. For 100356/100356 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 18836 event pairs, 448 based on Foata normal form. 3/3152 useless extension candidates. Maximal degree in co-relation 18965. Up to 2656 conditions per place. [2024-06-27 19:20:46,175 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 144 selfloop transitions, 87 changer transitions 0/238 dead transitions. [2024-06-27 19:20:46,175 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 238 transitions, 3194 flow [2024-06-27 19:20:46,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:20:46,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:20:46,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 208 transitions. [2024-06-27 19:20:46,176 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5777777777777777 [2024-06-27 19:20:46,177 INFO L175 Difference]: Start difference. First operand has 177 places, 216 transitions, 2538 flow. Second operand 9 states and 208 transitions. [2024-06-27 19:20:46,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 238 transitions, 3194 flow [2024-06-27 19:20:46,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 238 transitions, 3041 flow, removed 32 selfloop flow, removed 3 redundant places. [2024-06-27 19:20:46,409 INFO L231 Difference]: Finished difference. Result has 183 places, 221 transitions, 2643 flow [2024-06-27 19:20:46,409 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2393, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2643, PETRI_PLACES=183, PETRI_TRANSITIONS=221} [2024-06-27 19:20:46,409 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 142 predicate places. [2024-06-27 19:20:46,409 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 221 transitions, 2643 flow [2024-06-27 19:20:46,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:46,409 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:20:46,410 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 19:20:46,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-27 19:20:46,410 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:20:46,410 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:20:46,410 INFO L85 PathProgramCache]: Analyzing trace with hash -1152230882, now seen corresponding path program 4 times [2024-06-27 19:20:46,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:20:46,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186621263] [2024-06-27 19:20:46,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:20:46,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:20:46,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:20:46,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:20:46,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:20:46,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186621263] [2024-06-27 19:20:46,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186621263] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:20:46,471 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:20:46,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:20:46,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648660019] [2024-06-27 19:20:46,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:20:46,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:20:46,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:20:46,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:20:46,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:20:46,507 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:20:46,508 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 221 transitions, 2643 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:46,508 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:20:46,508 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:20:46,508 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:20:46,890 INFO L124 PetriNetUnfolderBase]: 1937/3256 cut-off events. [2024-06-27 19:20:46,890 INFO L125 PetriNetUnfolderBase]: For 110112/110115 co-relation queries the response was YES. [2024-06-27 19:20:46,908 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20024 conditions, 3256 events. 1937/3256 cut-off events. For 110112/110115 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 19653 event pairs, 469 based on Foata normal form. 5/3253 useless extension candidates. Maximal degree in co-relation 19937. Up to 2553 conditions per place. [2024-06-27 19:20:46,917 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 133 selfloop transitions, 115 changer transitions 0/255 dead transitions. [2024-06-27 19:20:46,918 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 255 transitions, 3561 flow [2024-06-27 19:20:46,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:20:46,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:20:46,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 188 transitions. [2024-06-27 19:20:46,919 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5875 [2024-06-27 19:20:46,919 INFO L175 Difference]: Start difference. First operand has 183 places, 221 transitions, 2643 flow. Second operand 8 states and 188 transitions. [2024-06-27 19:20:46,919 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 255 transitions, 3561 flow [2024-06-27 19:20:47,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 255 transitions, 3353 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-27 19:20:47,154 INFO L231 Difference]: Finished difference. Result has 185 places, 237 transitions, 2926 flow [2024-06-27 19:20:47,154 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2435, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2926, PETRI_PLACES=185, PETRI_TRANSITIONS=237} [2024-06-27 19:20:47,154 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 144 predicate places. [2024-06-27 19:20:47,155 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 237 transitions, 2926 flow [2024-06-27 19:20:47,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:47,155 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:20:47,155 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 19:20:47,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-27 19:20:47,155 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:20:47,155 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:20:47,156 INFO L85 PathProgramCache]: Analyzing trace with hash -1159582532, now seen corresponding path program 5 times [2024-06-27 19:20:47,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:20:47,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940304883] [2024-06-27 19:20:47,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:20:47,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:20:47,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:20:47,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:20:47,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:20:47,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940304883] [2024-06-27 19:20:47,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940304883] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:20:47,219 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:20:47,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:20:47,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358121046] [2024-06-27 19:20:47,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:20:47,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:20:47,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:20:47,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:20:47,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:20:47,259 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:20:47,259 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 237 transitions, 2926 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:47,259 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:20:47,260 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:20:47,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:20:47,667 INFO L124 PetriNetUnfolderBase]: 1952/3274 cut-off events. [2024-06-27 19:20:47,667 INFO L125 PetriNetUnfolderBase]: For 115166/115166 co-relation queries the response was YES. [2024-06-27 19:20:47,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20642 conditions, 3274 events. 1952/3274 cut-off events. For 115166/115166 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 19720 event pairs, 448 based on Foata normal form. 3/3272 useless extension candidates. Maximal degree in co-relation 20553. Up to 2567 conditions per place. [2024-06-27 19:20:47,693 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 126 selfloop transitions, 136 changer transitions 0/269 dead transitions. [2024-06-27 19:20:47,693 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 269 transitions, 3898 flow [2024-06-27 19:20:47,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:20:47,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:20:47,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 216 transitions. [2024-06-27 19:20:47,694 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-27 19:20:47,694 INFO L175 Difference]: Start difference. First operand has 185 places, 237 transitions, 2926 flow. Second operand 9 states and 216 transitions. [2024-06-27 19:20:47,695 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 269 transitions, 3898 flow [2024-06-27 19:20:47,952 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 269 transitions, 3676 flow, removed 51 selfloop flow, removed 4 redundant places. [2024-06-27 19:20:47,955 INFO L231 Difference]: Finished difference. Result has 191 places, 244 transitions, 3172 flow [2024-06-27 19:20:47,955 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2718, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3172, PETRI_PLACES=191, PETRI_TRANSITIONS=244} [2024-06-27 19:20:47,956 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 150 predicate places. [2024-06-27 19:20:47,956 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 244 transitions, 3172 flow [2024-06-27 19:20:47,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:47,956 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:20:47,956 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 19:20:47,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-27 19:20:47,957 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:20:47,957 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:20:47,957 INFO L85 PathProgramCache]: Analyzing trace with hash -746029504, now seen corresponding path program 6 times [2024-06-27 19:20:47,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:20:47,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714617682] [2024-06-27 19:20:47,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:20:47,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:20:47,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:20:48,029 INFO 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 19:20:48,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:20:48,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714617682] [2024-06-27 19:20:48,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714617682] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:20:48,030 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:20:48,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:20:48,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853895308] [2024-06-27 19:20:48,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:20:48,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:20:48,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:20:48,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:20:48,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:20:48,070 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:20:48,071 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 244 transitions, 3172 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:48,071 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:20:48,071 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:20:48,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:20:48,455 INFO L124 PetriNetUnfolderBase]: 1947/3270 cut-off events. [2024-06-27 19:20:48,456 INFO L125 PetriNetUnfolderBase]: For 117366/117366 co-relation queries the response was YES. [2024-06-27 19:20:48,475 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20972 conditions, 3270 events. 1947/3270 cut-off events. For 117366/117366 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 19710 event pairs, 448 based on Foata normal form. 3/3268 useless extension candidates. Maximal degree in co-relation 20881. Up to 2565 conditions per place. [2024-06-27 19:20:48,486 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 133 selfloop transitions, 126 changer transitions 0/266 dead transitions. [2024-06-27 19:20:48,486 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 266 transitions, 3916 flow [2024-06-27 19:20:48,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:20:48,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:20:48,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-27 19:20:48,487 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-27 19:20:48,487 INFO L175 Difference]: Start difference. First operand has 191 places, 244 transitions, 3172 flow. Second operand 7 states and 175 transitions. [2024-06-27 19:20:48,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 266 transitions, 3916 flow [2024-06-27 19:20:48,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 266 transitions, 3615 flow, removed 38 selfloop flow, removed 5 redundant places. [2024-06-27 19:20:48,784 INFO L231 Difference]: Finished difference. Result has 193 places, 244 transitions, 3139 flow [2024-06-27 19:20:48,784 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2871, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3139, PETRI_PLACES=193, PETRI_TRANSITIONS=244} [2024-06-27 19:20:48,785 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 152 predicate places. [2024-06-27 19:20:48,785 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 244 transitions, 3139 flow [2024-06-27 19:20:48,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:48,785 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:20:48,785 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:20:48,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-27 19:20:48,785 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:20:48,786 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:20:48,786 INFO L85 PathProgramCache]: Analyzing trace with hash 990135285, now seen corresponding path program 1 times [2024-06-27 19:20:48,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:20:48,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318308424] [2024-06-27 19:20:48,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:20:48,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:20:48,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:20:48,843 INFO 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 19:20:48,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:20:48,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318308424] [2024-06-27 19:20:48,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318308424] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:20:48,844 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:20:48,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:20:48,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622355315] [2024-06-27 19:20:48,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:20:48,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:20:48,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:20:48,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:20:48,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:20:48,878 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:20:48,878 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 244 transitions, 3139 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:48,878 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:20:48,879 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:20:48,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:20:49,253 INFO L124 PetriNetUnfolderBase]: 1979/3310 cut-off events. [2024-06-27 19:20:49,254 INFO L125 PetriNetUnfolderBase]: For 124555/124555 co-relation queries the response was YES. [2024-06-27 19:20:49,273 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21664 conditions, 3310 events. 1979/3310 cut-off events. For 124555/124555 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 19924 event pairs, 463 based on Foata normal form. 2/3292 useless extension candidates. Maximal degree in co-relation 21572. Up to 2529 conditions per place. [2024-06-27 19:20:49,284 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 145 selfloop transitions, 132 changer transitions 0/284 dead transitions. [2024-06-27 19:20:49,284 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 284 transitions, 4281 flow [2024-06-27 19:20:49,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:20:49,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:20:49,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-06-27 19:20:49,285 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6428571428571429 [2024-06-27 19:20:49,285 INFO L175 Difference]: Start difference. First operand has 193 places, 244 transitions, 3139 flow. Second operand 7 states and 180 transitions. [2024-06-27 19:20:49,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 284 transitions, 4281 flow [2024-06-27 19:20:49,518 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 284 transitions, 4013 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-27 19:20:49,521 INFO L231 Difference]: Finished difference. Result has 196 places, 258 transitions, 3494 flow [2024-06-27 19:20:49,521 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2885, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3494, PETRI_PLACES=196, PETRI_TRANSITIONS=258} [2024-06-27 19:20:49,522 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 155 predicate places. [2024-06-27 19:20:49,522 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 258 transitions, 3494 flow [2024-06-27 19:20:49,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:49,522 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:20:49,522 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:20:49,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-27 19:20:49,523 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:20:49,523 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:20:49,523 INFO L85 PathProgramCache]: Analyzing trace with hash 187543929, now seen corresponding path program 2 times [2024-06-27 19:20:49,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:20:49,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135832323] [2024-06-27 19:20:49,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:20:49,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:20:49,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:20:49,591 INFO 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 19:20:49,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:20:49,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135832323] [2024-06-27 19:20:49,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135832323] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:20:49,591 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:20:49,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:20:49,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247908758] [2024-06-27 19:20:49,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:20:49,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:20:49,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:20:49,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:20:49,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:20:49,632 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:20:49,632 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 258 transitions, 3494 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:49,632 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:20:49,632 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:20:49,633 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:20:50,033 INFO L124 PetriNetUnfolderBase]: 1971/3305 cut-off events. [2024-06-27 19:20:50,033 INFO L125 PetriNetUnfolderBase]: For 128058/128061 co-relation queries the response was YES. [2024-06-27 19:20:50,052 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21901 conditions, 3305 events. 1971/3305 cut-off events. For 128058/128061 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 19907 event pairs, 437 based on Foata normal form. 4/3298 useless extension candidates. Maximal degree in co-relation 21806. Up to 2817 conditions per place. [2024-06-27 19:20:50,063 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 199 selfloop transitions, 72 changer transitions 0/278 dead transitions. [2024-06-27 19:20:50,063 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 278 transitions, 4086 flow [2024-06-27 19:20:50,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:20:50,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:20:50,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-27 19:20:50,064 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6071428571428571 [2024-06-27 19:20:50,064 INFO L175 Difference]: Start difference. First operand has 196 places, 258 transitions, 3494 flow. Second operand 7 states and 170 transitions. [2024-06-27 19:20:50,064 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 278 transitions, 4086 flow [2024-06-27 19:20:50,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 278 transitions, 3927 flow, removed 30 selfloop flow, removed 2 redundant places. [2024-06-27 19:20:50,365 INFO L231 Difference]: Finished difference. Result has 201 places, 258 transitions, 3486 flow [2024-06-27 19:20:50,365 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3335, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3486, PETRI_PLACES=201, PETRI_TRANSITIONS=258} [2024-06-27 19:20:50,366 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 160 predicate places. [2024-06-27 19:20:50,366 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 258 transitions, 3486 flow [2024-06-27 19:20:50,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:50,366 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:20:50,366 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:20:50,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-27 19:20:50,366 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:20:50,367 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:20:50,367 INFO L85 PathProgramCache]: Analyzing trace with hash 1028463541, now seen corresponding path program 3 times [2024-06-27 19:20:50,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:20:50,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803277761] [2024-06-27 19:20:50,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:20:50,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:20:50,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:20:50,428 INFO 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 19:20:50,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:20:50,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803277761] [2024-06-27 19:20:50,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803277761] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:20:50,428 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:20:50,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:20:50,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732991514] [2024-06-27 19:20:50,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:20:50,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:20:50,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:20:50,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:20:50,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:20:50,472 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:20:50,472 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 258 transitions, 3486 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:50,473 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:20:50,473 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:20:50,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:20:50,879 INFO L124 PetriNetUnfolderBase]: 2027/3393 cut-off events. [2024-06-27 19:20:50,879 INFO L125 PetriNetUnfolderBase]: For 136221/136224 co-relation queries the response was YES. [2024-06-27 19:20:50,900 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22630 conditions, 3393 events. 2027/3393 cut-off events. For 136221/136224 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 20509 event pairs, 438 based on Foata normal form. 4/3386 useless extension candidates. Maximal degree in co-relation 22533. Up to 2844 conditions per place. [2024-06-27 19:20:50,911 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 206 selfloop transitions, 88 changer transitions 0/301 dead transitions. [2024-06-27 19:20:50,911 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 301 transitions, 4631 flow [2024-06-27 19:20:50,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:20:50,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:20:50,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 186 transitions. [2024-06-27 19:20:50,912 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.58125 [2024-06-27 19:20:50,912 INFO L175 Difference]: Start difference. First operand has 201 places, 258 transitions, 3486 flow. Second operand 8 states and 186 transitions. [2024-06-27 19:20:50,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 301 transitions, 4631 flow [2024-06-27 19:20:51,285 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 301 transitions, 4438 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-27 19:20:51,289 INFO L231 Difference]: Finished difference. Result has 208 places, 279 transitions, 3909 flow [2024-06-27 19:20:51,290 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3319, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3909, PETRI_PLACES=208, PETRI_TRANSITIONS=279} [2024-06-27 19:20:51,290 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 167 predicate places. [2024-06-27 19:20:51,290 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 279 transitions, 3909 flow [2024-06-27 19:20:51,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:51,290 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:20:51,290 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:20:51,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-27 19:20:51,291 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:20:51,291 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:20:51,291 INFO L85 PathProgramCache]: Analyzing trace with hash 1876997359, now seen corresponding path program 4 times [2024-06-27 19:20:51,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:20:51,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539177939] [2024-06-27 19:20:51,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:20:51,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:20:51,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:20:51,347 INFO 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 19:20:51,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:20:51,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539177939] [2024-06-27 19:20:51,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539177939] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:20:51,348 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:20:51,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:20:51,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548863491] [2024-06-27 19:20:51,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:20:51,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:20:51,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:20:51,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:20:51,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:20:51,376 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:20:51,376 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 279 transitions, 3909 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:51,376 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:20:51,376 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:20:51,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:20:51,790 INFO L124 PetriNetUnfolderBase]: 2064/3444 cut-off events. [2024-06-27 19:20:51,791 INFO L125 PetriNetUnfolderBase]: For 148134/148134 co-relation queries the response was YES. [2024-06-27 19:20:51,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23596 conditions, 3444 events. 2064/3444 cut-off events. For 148134/148134 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 20840 event pairs, 468 based on Foata normal form. 1/3438 useless extension candidates. Maximal degree in co-relation 23495. Up to 2564 conditions per place. [2024-06-27 19:20:51,823 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 140 selfloop transitions, 167 changer transitions 0/314 dead transitions. [2024-06-27 19:20:51,823 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 314 transitions, 5175 flow [2024-06-27 19:20:51,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:20:51,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:20:51,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-27 19:20:51,824 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6285714285714286 [2024-06-27 19:20:51,824 INFO L175 Difference]: Start difference. First operand has 208 places, 279 transitions, 3909 flow. Second operand 7 states and 176 transitions. [2024-06-27 19:20:51,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 314 transitions, 5175 flow [2024-06-27 19:20:52,226 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 314 transitions, 5014 flow, removed 32 selfloop flow, removed 2 redundant places. [2024-06-27 19:20:52,230 INFO L231 Difference]: Finished difference. Result has 213 places, 290 transitions, 4306 flow [2024-06-27 19:20:52,231 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3748, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=156, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4306, PETRI_PLACES=213, PETRI_TRANSITIONS=290} [2024-06-27 19:20:52,231 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 172 predicate places. [2024-06-27 19:20:52,231 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 290 transitions, 4306 flow [2024-06-27 19:20:52,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:52,231 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:20:52,231 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:20:52,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-27 19:20:52,232 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:20:52,232 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:20:52,232 INFO L85 PathProgramCache]: Analyzing trace with hash -1159976011, now seen corresponding path program 5 times [2024-06-27 19:20:52,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:20:52,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484760834] [2024-06-27 19:20:52,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:20:52,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:20:52,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:20:52,309 INFO 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 19:20:52,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:20:52,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484760834] [2024-06-27 19:20:52,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484760834] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:20:52,310 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:20:52,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:20:52,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716254159] [2024-06-27 19:20:52,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:20:52,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:20:52,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:20:52,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:20:52,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:20:52,341 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:20:52,341 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 290 transitions, 4306 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:52,342 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:20:52,342 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:20:52,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:20:52,795 INFO L124 PetriNetUnfolderBase]: 2069/3451 cut-off events. [2024-06-27 19:20:52,796 INFO L125 PetriNetUnfolderBase]: For 155480/155480 co-relation queries the response was YES. [2024-06-27 19:20:52,818 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24091 conditions, 3451 events. 2069/3451 cut-off events. For 155480/155480 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 20854 event pairs, 468 based on Foata normal form. 1/3445 useless extension candidates. Maximal degree in co-relation 23989. Up to 2566 conditions per place. [2024-06-27 19:20:52,830 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 142 selfloop transitions, 167 changer transitions 0/316 dead transitions. [2024-06-27 19:20:52,830 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 316 transitions, 5325 flow [2024-06-27 19:20:52,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:20:52,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:20:52,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-27 19:20:52,831 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-27 19:20:52,831 INFO L175 Difference]: Start difference. First operand has 213 places, 290 transitions, 4306 flow. Second operand 7 states and 175 transitions. [2024-06-27 19:20:52,831 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 316 transitions, 5325 flow [2024-06-27 19:20:53,218 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 316 transitions, 4988 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-27 19:20:53,222 INFO L231 Difference]: Finished difference. Result has 216 places, 293 transitions, 4366 flow [2024-06-27 19:20:53,223 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3972, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=290, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4366, PETRI_PLACES=216, PETRI_TRANSITIONS=293} [2024-06-27 19:20:53,223 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 175 predicate places. [2024-06-27 19:20:53,223 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 293 transitions, 4366 flow [2024-06-27 19:20:53,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:53,223 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:20:53,223 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:20:53,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-27 19:20:53,224 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:20:53,224 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:20:53,224 INFO L85 PathProgramCache]: Analyzing trace with hash 663125193, now seen corresponding path program 6 times [2024-06-27 19:20:53,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:20:53,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833817967] [2024-06-27 19:20:53,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:20:53,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:20:53,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:20:53,287 INFO 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 19:20:53,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:20:53,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833817967] [2024-06-27 19:20:53,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833817967] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:20:53,287 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:20:53,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:20:53,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136292531] [2024-06-27 19:20:53,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:20:53,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:20:53,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:20:53,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:20:53,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:20:53,314 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:20:53,314 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 293 transitions, 4366 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:53,314 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:20:53,315 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:20:53,315 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:20:53,834 INFO L124 PetriNetUnfolderBase]: 2066/3453 cut-off events. [2024-06-27 19:20:53,834 INFO L125 PetriNetUnfolderBase]: For 157966/157966 co-relation queries the response was YES. [2024-06-27 19:20:53,855 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24048 conditions, 3453 events. 2066/3453 cut-off events. For 157966/157966 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 20876 event pairs, 451 based on Foata normal form. 1/3449 useless extension candidates. Maximal degree in co-relation 23946. Up to 2924 conditions per place. [2024-06-27 19:20:53,867 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 220 selfloop transitions, 85 changer transitions 0/312 dead transitions. [2024-06-27 19:20:53,867 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 312 transitions, 5061 flow [2024-06-27 19:20:53,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:20:53,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:20:53,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 164 transitions. [2024-06-27 19:20:53,868 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5857142857142857 [2024-06-27 19:20:53,868 INFO L175 Difference]: Start difference. First operand has 216 places, 293 transitions, 4366 flow. Second operand 7 states and 164 transitions. [2024-06-27 19:20:53,868 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 312 transitions, 5061 flow [2024-06-27 19:20:54,228 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 312 transitions, 4676 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-27 19:20:54,232 INFO L231 Difference]: Finished difference. Result has 218 places, 295 transitions, 4202 flow [2024-06-27 19:20:54,232 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3986, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=293, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4202, PETRI_PLACES=218, PETRI_TRANSITIONS=295} [2024-06-27 19:20:54,232 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 177 predicate places. [2024-06-27 19:20:54,232 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 295 transitions, 4202 flow [2024-06-27 19:20:54,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:54,233 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:20:54,233 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:20:54,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-27 19:20:54,233 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:20:54,233 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:20:54,233 INFO L85 PathProgramCache]: Analyzing trace with hash -1148548171, now seen corresponding path program 7 times [2024-06-27 19:20:54,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:20:54,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079163544] [2024-06-27 19:20:54,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:20:54,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:20:54,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:20:54,287 INFO 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 19:20:54,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:20:54,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079163544] [2024-06-27 19:20:54,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079163544] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:20:54,288 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:20:54,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:20:54,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314232604] [2024-06-27 19:20:54,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:20:54,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:20:54,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:20:54,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:20:54,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:20:54,319 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:20:54,320 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 295 transitions, 4202 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:54,320 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:20:54,320 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:20:54,320 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:20:54,737 INFO L124 PetriNetUnfolderBase]: 2058/3434 cut-off events. [2024-06-27 19:20:54,737 INFO L125 PetriNetUnfolderBase]: For 162063/162063 co-relation queries the response was YES. [2024-06-27 19:20:54,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23581 conditions, 3434 events. 2058/3434 cut-off events. For 162063/162063 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 20774 event pairs, 468 based on Foata normal form. 2/3429 useless extension candidates. Maximal degree in co-relation 23478. Up to 2560 conditions per place. [2024-06-27 19:20:54,771 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 146 selfloop transitions, 161 changer transitions 0/314 dead transitions. [2024-06-27 19:20:54,771 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 314 transitions, 5062 flow [2024-06-27 19:20:54,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:20:54,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:20:54,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-27 19:20:54,772 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6178571428571429 [2024-06-27 19:20:54,772 INFO L175 Difference]: Start difference. First operand has 218 places, 295 transitions, 4202 flow. Second operand 7 states and 173 transitions. [2024-06-27 19:20:54,772 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 314 transitions, 5062 flow [2024-06-27 19:20:55,220 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 314 transitions, 4842 flow, removed 28 selfloop flow, removed 4 redundant places. [2024-06-27 19:20:55,224 INFO L231 Difference]: Finished difference. Result has 221 places, 295 transitions, 4312 flow [2024-06-27 19:20:55,224 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3982, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4312, PETRI_PLACES=221, PETRI_TRANSITIONS=295} [2024-06-27 19:20:55,225 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 180 predicate places. [2024-06-27 19:20:55,225 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 295 transitions, 4312 flow [2024-06-27 19:20:55,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:55,226 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:20:55,226 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:20:55,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-27 19:20:55,226 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:20:55,226 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:20:55,226 INFO L85 PathProgramCache]: Analyzing trace with hash -1033494151, now seen corresponding path program 8 times [2024-06-27 19:20:55,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:20:55,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812023851] [2024-06-27 19:20:55,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:20:55,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:20:55,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:20:55,286 INFO 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 19:20:55,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:20:55,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812023851] [2024-06-27 19:20:55,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812023851] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:20:55,287 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:20:55,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:20:55,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942374064] [2024-06-27 19:20:55,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:20:55,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:20:55,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:20:55,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:20:55,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:20:55,319 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:20:55,319 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 295 transitions, 4312 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:55,320 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:20:55,320 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:20:55,320 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:20:55,862 INFO L124 PetriNetUnfolderBase]: 2052/3434 cut-off events. [2024-06-27 19:20:55,862 INFO L125 PetriNetUnfolderBase]: For 164669/164669 co-relation queries the response was YES. [2024-06-27 19:20:55,884 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23797 conditions, 3434 events. 2052/3434 cut-off events. For 164669/164669 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 20804 event pairs, 449 based on Foata normal form. 2/3431 useless extension candidates. Maximal degree in co-relation 23693. Up to 2855 conditions per place. [2024-06-27 19:20:55,896 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 202 selfloop transitions, 103 changer transitions 0/312 dead transitions. [2024-06-27 19:20:55,897 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 312 transitions, 5064 flow [2024-06-27 19:20:55,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:20:55,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:20:55,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 205 transitions. [2024-06-27 19:20:55,898 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5694444444444444 [2024-06-27 19:20:55,898 INFO L175 Difference]: Start difference. First operand has 221 places, 295 transitions, 4312 flow. Second operand 9 states and 205 transitions. [2024-06-27 19:20:55,898 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 312 transitions, 5064 flow [2024-06-27 19:20:56,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 312 transitions, 4725 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-27 19:20:56,305 INFO L231 Difference]: Finished difference. Result has 224 places, 295 transitions, 4186 flow [2024-06-27 19:20:56,306 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3973, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4186, PETRI_PLACES=224, PETRI_TRANSITIONS=295} [2024-06-27 19:20:56,306 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 183 predicate places. [2024-06-27 19:20:56,306 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 295 transitions, 4186 flow [2024-06-27 19:20:56,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:56,306 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:20:56,306 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:20:56,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-27 19:20:56,307 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:20:56,307 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:20:56,307 INFO L85 PathProgramCache]: Analyzing trace with hash -1033257001, now seen corresponding path program 9 times [2024-06-27 19:20:56,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:20:56,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093626675] [2024-06-27 19:20:56,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:20:56,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:20:56,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:20:56,371 INFO 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 19:20:56,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:20:56,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093626675] [2024-06-27 19:20:56,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093626675] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:20:56,371 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:20:56,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:20:56,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508967730] [2024-06-27 19:20:56,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:20:56,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:20:56,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:20:56,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:20:56,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:20:56,403 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:20:56,403 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 295 transitions, 4186 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:56,403 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:20:56,403 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:20:56,404 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:20:56,890 INFO L124 PetriNetUnfolderBase]: 2044/3421 cut-off events. [2024-06-27 19:20:56,890 INFO L125 PetriNetUnfolderBase]: For 167047/167047 co-relation queries the response was YES. [2024-06-27 19:20:56,912 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23424 conditions, 3421 events. 2044/3421 cut-off events. For 167047/167047 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 20721 event pairs, 449 based on Foata normal form. 2/3418 useless extension candidates. Maximal degree in co-relation 23319. Up to 2847 conditions per place. [2024-06-27 19:20:56,922 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 203 selfloop transitions, 99 changer transitions 0/309 dead transitions. [2024-06-27 19:20:56,922 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 309 transitions, 4824 flow [2024-06-27 19:20:56,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:20:56,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:20:56,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2024-06-27 19:20:56,923 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5928571428571429 [2024-06-27 19:20:56,923 INFO L175 Difference]: Start difference. First operand has 224 places, 295 transitions, 4186 flow. Second operand 7 states and 166 transitions. [2024-06-27 19:20:56,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 309 transitions, 4824 flow [2024-06-27 19:20:57,380 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 309 transitions, 4534 flow, removed 31 selfloop flow, removed 7 redundant places. [2024-06-27 19:20:57,384 INFO L231 Difference]: Finished difference. Result has 224 places, 295 transitions, 4103 flow [2024-06-27 19:20:57,384 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3896, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4103, PETRI_PLACES=224, PETRI_TRANSITIONS=295} [2024-06-27 19:20:57,384 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 183 predicate places. [2024-06-27 19:20:57,385 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 295 transitions, 4103 flow [2024-06-27 19:20:57,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:57,385 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:20:57,385 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:20:57,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-27 19:20:57,385 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:20:57,385 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:20:57,385 INFO L85 PathProgramCache]: Analyzing trace with hash -1587505995, now seen corresponding path program 10 times [2024-06-27 19:20:57,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:20:57,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560030425] [2024-06-27 19:20:57,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:20:57,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:20:57,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:20:57,443 INFO 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 19:20:57,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:20:57,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560030425] [2024-06-27 19:20:57,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560030425] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:20:57,443 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:20:57,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:20:57,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387268372] [2024-06-27 19:20:57,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:20:57,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:20:57,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:20:57,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:20:57,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:20:57,471 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:20:57,472 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 295 transitions, 4103 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:57,472 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:20:57,472 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:20:57,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:20:57,896 INFO L124 PetriNetUnfolderBase]: 2038/3413 cut-off events. [2024-06-27 19:20:57,897 INFO L125 PetriNetUnfolderBase]: For 169340/169340 co-relation queries the response was YES. [2024-06-27 19:20:57,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23238 conditions, 3413 events. 2038/3413 cut-off events. For 169340/169340 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 20688 event pairs, 449 based on Foata normal form. 2/3410 useless extension candidates. Maximal degree in co-relation 23132. Up to 2612 conditions per place. [2024-06-27 19:20:57,928 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 156 selfloop transitions, 157 changer transitions 0/320 dead transitions. [2024-06-27 19:20:57,929 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 320 transitions, 5003 flow [2024-06-27 19:20:57,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:20:57,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:20:57,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-27 19:20:57,930 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6357142857142857 [2024-06-27 19:20:57,930 INFO L175 Difference]: Start difference. First operand has 224 places, 295 transitions, 4103 flow. Second operand 7 states and 178 transitions. [2024-06-27 19:20:57,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 320 transitions, 5003 flow [2024-06-27 19:20:58,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 320 transitions, 4775 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-27 19:20:58,456 INFO L231 Difference]: Finished difference. Result has 225 places, 295 transitions, 4210 flow [2024-06-27 19:20:58,457 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3875, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=157, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4210, PETRI_PLACES=225, PETRI_TRANSITIONS=295} [2024-06-27 19:20:58,457 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 184 predicate places. [2024-06-27 19:20:58,457 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 295 transitions, 4210 flow [2024-06-27 19:20:58,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:58,457 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:20:58,457 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:20:58,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-27 19:20:58,458 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:20:58,458 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:20:58,458 INFO L85 PathProgramCache]: Analyzing trace with hash -1587743145, now seen corresponding path program 11 times [2024-06-27 19:20:58,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:20:58,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26851830] [2024-06-27 19:20:58,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:20:58,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:20:58,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:20:58,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:20:58,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:20:58,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26851830] [2024-06-27 19:20:58,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26851830] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:20:58,516 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:20:58,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:20:58,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553483255] [2024-06-27 19:20:58,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:20:58,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:20:58,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:20:58,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:20:58,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:20:58,558 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:20:58,558 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 295 transitions, 4210 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:58,558 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:20:58,558 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:20:58,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:20:59,023 INFO L124 PetriNetUnfolderBase]: 2032/3405 cut-off events. [2024-06-27 19:20:59,023 INFO L125 PetriNetUnfolderBase]: For 172678/172678 co-relation queries the response was YES. [2024-06-27 19:20:59,044 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23386 conditions, 3405 events. 2032/3405 cut-off events. For 172678/172678 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 20577 event pairs, 449 based on Foata normal form. 2/3402 useless extension candidates. Maximal degree in co-relation 23279. Up to 2609 conditions per place. [2024-06-27 19:20:59,054 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 152 selfloop transitions, 169 changer transitions 0/328 dead transitions. [2024-06-27 19:20:59,055 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 328 transitions, 5150 flow [2024-06-27 19:20:59,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:20:59,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:20:59,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 224 transitions. [2024-06-27 19:20:59,056 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6222222222222222 [2024-06-27 19:20:59,056 INFO L175 Difference]: Start difference. First operand has 225 places, 295 transitions, 4210 flow. Second operand 9 states and 224 transitions. [2024-06-27 19:20:59,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 328 transitions, 5150 flow [2024-06-27 19:20:59,478 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 328 transitions, 4709 flow, removed 21 selfloop flow, removed 9 redundant places. [2024-06-27 19:20:59,482 INFO L231 Difference]: Finished difference. Result has 225 places, 295 transitions, 4135 flow [2024-06-27 19:20:59,483 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3777, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=169, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4135, PETRI_PLACES=225, PETRI_TRANSITIONS=295} [2024-06-27 19:20:59,483 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 184 predicate places. [2024-06-27 19:20:59,483 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 295 transitions, 4135 flow [2024-06-27 19:20:59,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:59,483 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:20:59,483 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:20:59,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-27 19:20:59,484 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:20:59,484 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:20:59,484 INFO L85 PathProgramCache]: Analyzing trace with hash -1764874665, now seen corresponding path program 12 times [2024-06-27 19:20:59,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:20:59,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273796211] [2024-06-27 19:20:59,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:20:59,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:20:59,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:20:59,541 INFO 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 19:20:59,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:20:59,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273796211] [2024-06-27 19:20:59,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273796211] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:20:59,542 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:20:59,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:20:59,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161177914] [2024-06-27 19:20:59,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:20:59,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:20:59,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:20:59,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:20:59,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:20:59,585 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:20:59,585 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 295 transitions, 4135 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:59,585 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:20:59,585 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:20:59,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:21:00,039 INFO L124 PetriNetUnfolderBase]: 2016/3381 cut-off events. [2024-06-27 19:21:00,039 INFO L125 PetriNetUnfolderBase]: For 162767/162770 co-relation queries the response was YES. [2024-06-27 19:21:00,062 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22799 conditions, 3381 events. 2016/3381 cut-off events. For 162767/162770 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 20464 event pairs, 435 based on Foata normal form. 6/3376 useless extension candidates. Maximal degree in co-relation 22693. Up to 2596 conditions per place. [2024-06-27 19:21:00,073 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 160 selfloop transitions, 160 changer transitions 0/327 dead transitions. [2024-06-27 19:21:00,073 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 327 transitions, 5067 flow [2024-06-27 19:21:00,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:21:00,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:21:00,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 207 transitions. [2024-06-27 19:21:00,074 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.646875 [2024-06-27 19:21:00,075 INFO L175 Difference]: Start difference. First operand has 225 places, 295 transitions, 4135 flow. Second operand 8 states and 207 transitions. [2024-06-27 19:21:00,075 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 327 transitions, 5067 flow [2024-06-27 19:21:00,519 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 327 transitions, 4670 flow, removed 23 selfloop flow, removed 11 redundant places. [2024-06-27 19:21:00,524 INFO L231 Difference]: Finished difference. Result has 222 places, 295 transitions, 4093 flow [2024-06-27 19:21:00,524 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3750, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=160, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4093, PETRI_PLACES=222, PETRI_TRANSITIONS=295} [2024-06-27 19:21:00,524 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 181 predicate places. [2024-06-27 19:21:00,524 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 295 transitions, 4093 flow [2024-06-27 19:21:00,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:21:00,525 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:21:00,525 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:21:00,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-27 19:21:00,525 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:21:00,525 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:21:00,525 INFO L85 PathProgramCache]: Analyzing trace with hash -1351321521, now seen corresponding path program 1 times [2024-06-27 19:21:00,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:21:00,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830665578] [2024-06-27 19:21:00,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:21:00,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:21:00,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:21:00,586 INFO 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 19:21:00,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:21:00,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830665578] [2024-06-27 19:21:00,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830665578] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:21:00,587 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:21:00,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:21:00,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467636105] [2024-06-27 19:21:00,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:21:00,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:21:00,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:21:00,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:21:00,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:21:00,618 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:21:00,619 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 295 transitions, 4093 flow. Second operand has 6 states, 6 states have (on average 16.333333333333332) internal successors, (98), 6 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:21:00,619 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:21:00,619 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:21:00,619 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:21:01,010 INFO L124 PetriNetUnfolderBase]: 2008/3374 cut-off events. [2024-06-27 19:21:01,011 INFO L125 PetriNetUnfolderBase]: For 146795/146795 co-relation queries the response was YES. [2024-06-27 19:21:01,034 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22394 conditions, 3374 events. 2008/3374 cut-off events. For 146795/146795 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 20455 event pairs, 406 based on Foata normal form. 2/3374 useless extension candidates. Maximal degree in co-relation 22290. Up to 3058 conditions per place. [2024-06-27 19:21:01,045 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 287 selfloop transitions, 19 changer transitions 0/313 dead transitions. [2024-06-27 19:21:01,046 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 313 transitions, 4783 flow [2024-06-27 19:21:01,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:21:01,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:21:01,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 122 transitions. [2024-06-27 19:21:01,047 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.61 [2024-06-27 19:21:01,047 INFO L175 Difference]: Start difference. First operand has 222 places, 295 transitions, 4093 flow. Second operand 5 states and 122 transitions. [2024-06-27 19:21:01,047 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 313 transitions, 4783 flow [2024-06-27 19:21:01,376 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 313 transitions, 4435 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-27 19:21:01,380 INFO L231 Difference]: Finished difference. Result has 219 places, 297 transitions, 3830 flow [2024-06-27 19:21:01,381 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3745, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3830, PETRI_PLACES=219, PETRI_TRANSITIONS=297} [2024-06-27 19:21:01,382 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 178 predicate places. [2024-06-27 19:21:01,382 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 297 transitions, 3830 flow [2024-06-27 19:21:01,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.333333333333332) internal successors, (98), 6 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:21:01,383 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:21:01,383 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:21:01,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-27 19:21:01,383 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:21:01,383 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:21:01,383 INFO L85 PathProgramCache]: Analyzing trace with hash -1350846291, now seen corresponding path program 2 times [2024-06-27 19:21:01,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:21:01,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579550679] [2024-06-27 19:21:01,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:21:01,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:21:01,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:21:01,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:21:01,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:21:01,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579550679] [2024-06-27 19:21:01,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579550679] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:21:01,454 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:21:01,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:21:01,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903074457] [2024-06-27 19:21:01,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:21:01,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:21:01,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:21:01,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:21:01,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:21:01,498 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:21:01,498 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 297 transitions, 3830 flow. Second operand has 6 states, 6 states have (on average 16.333333333333332) internal successors, (98), 6 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:21:01,499 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:21:01,499 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:21:01,499 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:21:01,879 INFO L124 PetriNetUnfolderBase]: 2003/3374 cut-off events. [2024-06-27 19:21:01,879 INFO L125 PetriNetUnfolderBase]: For 137562/137567 co-relation queries the response was YES. [2024-06-27 19:21:01,900 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21682 conditions, 3374 events. 2003/3374 cut-off events. For 137562/137567 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 20496 event pairs, 403 based on Foata normal form. 6/3378 useless extension candidates. Maximal degree in co-relation 21578. Up to 3031 conditions per place. [2024-06-27 19:21:01,910 INFO L140 encePairwiseOnDemand]: 34/40 looper letters, 284 selfloop transitions, 19 changer transitions 0/310 dead transitions. [2024-06-27 19:21:01,911 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 310 transitions, 4504 flow [2024-06-27 19:21:01,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:21:01,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:21:01,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 115 transitions. [2024-06-27 19:21:01,912 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.575 [2024-06-27 19:21:01,912 INFO L175 Difference]: Start difference. First operand has 219 places, 297 transitions, 3830 flow. Second operand 5 states and 115 transitions. [2024-06-27 19:21:01,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 310 transitions, 4504 flow [2024-06-27 19:21:02,328 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 310 transitions, 4439 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-27 19:21:02,332 INFO L231 Difference]: Finished difference. Result has 221 places, 299 transitions, 3854 flow [2024-06-27 19:21:02,332 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3765, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=297, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=278, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3854, PETRI_PLACES=221, PETRI_TRANSITIONS=299} [2024-06-27 19:21:02,332 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 180 predicate places. [2024-06-27 19:21:02,332 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 299 transitions, 3854 flow [2024-06-27 19:21:02,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.333333333333332) internal successors, (98), 6 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:21:02,333 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:21:02,333 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:21:02,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-27 19:21:02,333 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:21:02,333 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:21:02,333 INFO L85 PathProgramCache]: Analyzing trace with hash -1151396203, now seen corresponding path program 1 times [2024-06-27 19:21:02,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:21:02,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532611043] [2024-06-27 19:21:02,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:21:02,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:21:02,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:21:02,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:21:02,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:21:02,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532611043] [2024-06-27 19:21:02,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532611043] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:21:02,394 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:21:02,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:21:02,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701529362] [2024-06-27 19:21:02,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:21:02,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:21:02,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:21:02,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:21:02,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:21:02,441 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:21:02,441 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 299 transitions, 3854 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:21:02,441 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:21:02,441 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:21:02,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:21:02,850 INFO L124 PetriNetUnfolderBase]: 2011/3394 cut-off events. [2024-06-27 19:21:02,850 INFO L125 PetriNetUnfolderBase]: For 143716/143716 co-relation queries the response was YES. [2024-06-27 19:21:02,873 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21918 conditions, 3394 events. 2011/3394 cut-off events. For 143716/143716 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 20682 event pairs, 374 based on Foata normal form. 2/3395 useless extension candidates. Maximal degree in co-relation 21813. Up to 3029 conditions per place. [2024-06-27 19:21:02,885 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 288 selfloop transitions, 31 changer transitions 0/326 dead transitions. [2024-06-27 19:21:02,885 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 326 transitions, 4742 flow [2024-06-27 19:21:02,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:21:02,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:21:02,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 161 transitions. [2024-06-27 19:21:02,886 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.575 [2024-06-27 19:21:02,887 INFO L175 Difference]: Start difference. First operand has 221 places, 299 transitions, 3854 flow. Second operand 7 states and 161 transitions. [2024-06-27 19:21:02,887 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 326 transitions, 4742 flow [2024-06-27 19:21:03,237 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 326 transitions, 4669 flow, removed 19 selfloop flow, removed 3 redundant places. [2024-06-27 19:21:03,241 INFO L231 Difference]: Finished difference. Result has 225 places, 303 transitions, 3944 flow [2024-06-27 19:21:03,241 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3781, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3944, PETRI_PLACES=225, PETRI_TRANSITIONS=303} [2024-06-27 19:21:03,242 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 184 predicate places. [2024-06-27 19:21:03,242 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 303 transitions, 3944 flow [2024-06-27 19:21:03,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:21:03,242 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:21:03,242 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:21:03,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-27 19:21:03,242 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:21:03,243 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:21:03,243 INFO L85 PathProgramCache]: Analyzing trace with hash 1636281059, now seen corresponding path program 2 times [2024-06-27 19:21:03,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:21:03,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497495207] [2024-06-27 19:21:03,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:21:03,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:21:03,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:21:03,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:21:03,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:21:03,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497495207] [2024-06-27 19:21:03,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497495207] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:21:03,307 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:21:03,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:21:03,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083394907] [2024-06-27 19:21:03,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:21:03,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:21:03,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:21:03,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:21:03,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:21:03,347 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:21:03,347 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 303 transitions, 3944 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:21:03,347 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:21:03,347 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:21:03,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:21:03,777 INFO L124 PetriNetUnfolderBase]: 2019/3406 cut-off events. [2024-06-27 19:21:03,777 INFO L125 PetriNetUnfolderBase]: For 149377/149377 co-relation queries the response was YES. [2024-06-27 19:21:03,799 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22153 conditions, 3406 events. 2019/3406 cut-off events. For 149377/149377 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 20772 event pairs, 405 based on Foata normal form. 2/3407 useless extension candidates. Maximal degree in co-relation 22047. Up to 3074 conditions per place. [2024-06-27 19:21:03,810 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 288 selfloop transitions, 28 changer transitions 0/323 dead transitions. [2024-06-27 19:21:03,810 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 323 transitions, 4670 flow [2024-06-27 19:21:03,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:21:03,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:21:03,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 156 transitions. [2024-06-27 19:21:03,811 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5571428571428572 [2024-06-27 19:21:03,811 INFO L175 Difference]: Start difference. First operand has 225 places, 303 transitions, 3944 flow. Second operand 7 states and 156 transitions. [2024-06-27 19:21:03,811 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 323 transitions, 4670 flow [2024-06-27 19:21:04,287 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 323 transitions, 4562 flow, removed 39 selfloop flow, removed 3 redundant places. [2024-06-27 19:21:04,296 INFO L231 Difference]: Finished difference. Result has 229 places, 305 transitions, 3951 flow [2024-06-27 19:21:04,297 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3854, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3951, PETRI_PLACES=229, PETRI_TRANSITIONS=305} [2024-06-27 19:21:04,297 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 188 predicate places. [2024-06-27 19:21:04,298 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 305 transitions, 3951 flow [2024-06-27 19:21:04,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:21:04,298 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:21:04,298 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:21:04,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-27 19:21:04,298 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:21:04,298 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:21:04,299 INFO L85 PathProgramCache]: Analyzing trace with hash -1033248073, now seen corresponding path program 3 times [2024-06-27 19:21:04,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:21:04,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914133972] [2024-06-27 19:21:04,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:21:04,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:21:04,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:21:04,389 INFO 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 19:21:04,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:21:04,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914133972] [2024-06-27 19:21:04,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914133972] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:21:04,390 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:21:04,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:21:04,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826334141] [2024-06-27 19:21:04,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:21:04,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:21:04,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:21:04,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:21:04,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:21:04,428 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:21:04,428 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 305 transitions, 3951 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:21:04,428 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:21:04,428 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:21:04,429 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:21:04,875 INFO L124 PetriNetUnfolderBase]: 2027/3418 cut-off events. [2024-06-27 19:21:04,876 INFO L125 PetriNetUnfolderBase]: For 154241/154241 co-relation queries the response was YES. [2024-06-27 19:21:04,898 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22247 conditions, 3418 events. 2027/3418 cut-off events. For 154241/154241 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 20845 event pairs, 405 based on Foata normal form. 2/3419 useless extension candidates. Maximal degree in co-relation 22139. Up to 3101 conditions per place. [2024-06-27 19:21:04,909 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 295 selfloop transitions, 20 changer transitions 0/322 dead transitions. [2024-06-27 19:21:04,909 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 322 transitions, 4653 flow [2024-06-27 19:21:04,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:21:04,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:21:04,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 152 transitions. [2024-06-27 19:21:04,910 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5428571428571428 [2024-06-27 19:21:04,910 INFO L175 Difference]: Start difference. First operand has 229 places, 305 transitions, 3951 flow. Second operand 7 states and 152 transitions. [2024-06-27 19:21:04,910 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 322 transitions, 4653 flow [2024-06-27 19:21:05,376 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 322 transitions, 4576 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-27 19:21:05,380 INFO L231 Difference]: Finished difference. Result has 231 places, 307 transitions, 3959 flow [2024-06-27 19:21:05,380 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3874, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=285, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3959, PETRI_PLACES=231, PETRI_TRANSITIONS=307} [2024-06-27 19:21:05,382 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 190 predicate places. [2024-06-27 19:21:05,382 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 307 transitions, 3959 flow [2024-06-27 19:21:05,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:21:05,382 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:21:05,382 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:21:05,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-27 19:21:05,383 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:21:05,383 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:21:05,383 INFO L85 PathProgramCache]: Analyzing trace with hash 1751756927, now seen corresponding path program 1 times [2024-06-27 19:21:05,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:21:05,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398553910] [2024-06-27 19:21:05,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:21:05,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:21:05,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:21:05,454 INFO 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 19:21:05,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:21:05,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398553910] [2024-06-27 19:21:05,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398553910] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:21:05,454 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:21:05,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:21:05,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742346977] [2024-06-27 19:21:05,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:21:05,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:21:05,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:21:05,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:21:05,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:21:05,484 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:21:05,484 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 307 transitions, 3959 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:21:05,484 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:21:05,485 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:21:05,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:21:05,920 INFO L124 PetriNetUnfolderBase]: 2071/3478 cut-off events. [2024-06-27 19:21:05,920 INFO L125 PetriNetUnfolderBase]: For 175504/175504 co-relation queries the response was YES. [2024-06-27 19:21:05,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22611 conditions, 3478 events. 2071/3478 cut-off events. For 175504/175504 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 21176 event pairs, 446 based on Foata normal form. 12/3485 useless extension candidates. Maximal degree in co-relation 22502. Up to 2900 conditions per place. [2024-06-27 19:21:05,954 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 238 selfloop transitions, 83 changer transitions 0/328 dead transitions. [2024-06-27 19:21:05,955 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 328 transitions, 4713 flow [2024-06-27 19:21:05,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:21:05,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:21:05,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-27 19:21:05,956 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-27 19:21:05,956 INFO L175 Difference]: Start difference. First operand has 231 places, 307 transitions, 3959 flow. Second operand 7 states and 168 transitions. [2024-06-27 19:21:05,956 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 328 transitions, 4713 flow [2024-06-27 19:21:06,387 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 328 transitions, 4648 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-27 19:21:06,391 INFO L231 Difference]: Finished difference. Result has 233 places, 310 transitions, 4131 flow [2024-06-27 19:21:06,391 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3894, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=307, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4131, PETRI_PLACES=233, PETRI_TRANSITIONS=310} [2024-06-27 19:21:06,392 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 192 predicate places. [2024-06-27 19:21:06,392 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 310 transitions, 4131 flow [2024-06-27 19:21:06,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:21:06,392 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:21:06,392 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:21:06,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-27 19:21:06,392 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:21:06,393 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:21:06,393 INFO L85 PathProgramCache]: Analyzing trace with hash -1587497067, now seen corresponding path program 4 times [2024-06-27 19:21:06,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:21:06,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863038509] [2024-06-27 19:21:06,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:21:06,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:21:06,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:21:06,464 INFO 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 19:21:06,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:21:06,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863038509] [2024-06-27 19:21:06,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863038509] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:21:06,465 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:21:06,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:21:06,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693369576] [2024-06-27 19:21:06,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:21:06,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:21:06,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:21:06,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:21:06,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:21:06,502 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:21:06,503 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 310 transitions, 4131 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:21:06,503 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:21:06,503 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:21:06,503 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:21:06,997 INFO L124 PetriNetUnfolderBase]: 2066/3479 cut-off events. [2024-06-27 19:21:06,997 INFO L125 PetriNetUnfolderBase]: For 163328/163328 co-relation queries the response was YES. [2024-06-27 19:21:07,019 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22906 conditions, 3479 events. 2066/3479 cut-off events. For 163328/163328 co-relation queries the response was YES. Maximal size of possible extension queue 249. Compared 21224 event pairs, 377 based on Foata normal form. 2/3480 useless extension candidates. Maximal degree in co-relation 22796. Up to 3126 conditions per place. [2024-06-27 19:21:07,031 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 294 selfloop transitions, 29 changer transitions 0/330 dead transitions. [2024-06-27 19:21:07,031 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 330 transitions, 4827 flow [2024-06-27 19:21:07,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:21:07,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:21:07,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 142 transitions. [2024-06-27 19:21:07,032 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5916666666666667 [2024-06-27 19:21:07,032 INFO L175 Difference]: Start difference. First operand has 233 places, 310 transitions, 4131 flow. Second operand 6 states and 142 transitions. [2024-06-27 19:21:07,032 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 330 transitions, 4827 flow [2024-06-27 19:21:07,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 330 transitions, 4598 flow, removed 34 selfloop flow, removed 5 redundant places. [2024-06-27 19:21:07,491 INFO L231 Difference]: Finished difference. Result has 234 places, 310 transitions, 3971 flow [2024-06-27 19:21:07,492 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3902, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=310, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3971, PETRI_PLACES=234, PETRI_TRANSITIONS=310} [2024-06-27 19:21:07,492 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 193 predicate places. [2024-06-27 19:21:07,492 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 310 transitions, 3971 flow [2024-06-27 19:21:07,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:21:07,492 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:21:07,492 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:21:07,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-27 19:21:07,493 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:21:07,493 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:21:07,493 INFO L85 PathProgramCache]: Analyzing trace with hash -1359411219, now seen corresponding path program 2 times [2024-06-27 19:21:07,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:21:07,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971427075] [2024-06-27 19:21:07,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:21:07,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:21:07,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:21:07,557 INFO 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 19:21:07,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:21:07,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971427075] [2024-06-27 19:21:07,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971427075] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:21:07,557 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:21:07,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:21:07,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990519677] [2024-06-27 19:21:07,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:21:07,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:21:07,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:21:07,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:21:07,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:21:07,597 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:21:07,598 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 310 transitions, 3971 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:21:07,598 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:21:07,598 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:21:07,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:21:08,044 INFO L124 PetriNetUnfolderBase]: 2110/3550 cut-off events. [2024-06-27 19:21:08,044 INFO L125 PetriNetUnfolderBase]: For 185289/185292 co-relation queries the response was YES. [2024-06-27 19:21:08,068 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22994 conditions, 3550 events. 2110/3550 cut-off events. For 185289/185292 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 21719 event pairs, 480 based on Foata normal form. 14/3556 useless extension candidates. Maximal degree in co-relation 22883. Up to 2961 conditions per place. [2024-06-27 19:21:08,079 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 246 selfloop transitions, 74 changer transitions 0/327 dead transitions. [2024-06-27 19:21:08,079 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 327 transitions, 4719 flow [2024-06-27 19:21:08,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:21:08,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:21:08,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 143 transitions. [2024-06-27 19:21:08,080 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5958333333333333 [2024-06-27 19:21:08,081 INFO L175 Difference]: Start difference. First operand has 234 places, 310 transitions, 3971 flow. Second operand 6 states and 143 transitions. [2024-06-27 19:21:08,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 327 transitions, 4719 flow [2024-06-27 19:21:08,538 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 327 transitions, 4652 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-27 19:21:08,542 INFO L231 Difference]: Finished difference. Result has 235 places, 313 transitions, 4129 flow [2024-06-27 19:21:08,542 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3904, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=310, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4129, PETRI_PLACES=235, PETRI_TRANSITIONS=313} [2024-06-27 19:21:08,542 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 194 predicate places. [2024-06-27 19:21:08,542 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 313 transitions, 4129 flow [2024-06-27 19:21:08,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:21:08,543 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:21:08,543 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:21:08,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-27 19:21:08,543 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:21:08,543 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:21:08,543 INFO L85 PathProgramCache]: Analyzing trace with hash -1350840339, now seen corresponding path program 3 times [2024-06-27 19:21:08,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:21:08,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375976909] [2024-06-27 19:21:08,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:21:08,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:21:08,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:21:08,604 INFO 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 19:21:08,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:21:08,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375976909] [2024-06-27 19:21:08,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375976909] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:21:08,605 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:21:08,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:21:08,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843539424] [2024-06-27 19:21:08,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:21:08,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:21:08,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:21:08,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:21:08,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:21:08,646 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:21:08,646 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 313 transitions, 4129 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:21:08,646 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:21:08,646 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:21:08,646 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:21:09,142 INFO L124 PetriNetUnfolderBase]: 2269/3805 cut-off events. [2024-06-27 19:21:09,142 INFO L125 PetriNetUnfolderBase]: For 214910/214913 co-relation queries the response was YES. [2024-06-27 19:21:09,167 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25633 conditions, 3805 events. 2269/3805 cut-off events. For 214910/214913 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 23590 event pairs, 494 based on Foata normal form. 14/3811 useless extension candidates. Maximal degree in co-relation 25521. Up to 2912 conditions per place. [2024-06-27 19:21:09,180 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 254 selfloop transitions, 78 changer transitions 0/339 dead transitions. [2024-06-27 19:21:09,180 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 339 transitions, 5129 flow [2024-06-27 19:21:09,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:21:09,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:21:09,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 147 transitions. [2024-06-27 19:21:09,181 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6125 [2024-06-27 19:21:09,181 INFO L175 Difference]: Start difference. First operand has 235 places, 313 transitions, 4129 flow. Second operand 6 states and 147 transitions. [2024-06-27 19:21:09,181 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 339 transitions, 5129 flow [2024-06-27 19:21:09,694 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 339 transitions, 4934 flow, removed 26 selfloop flow, removed 4 redundant places. [2024-06-27 19:21:09,698 INFO L231 Difference]: Finished difference. Result has 238 places, 319 transitions, 4254 flow [2024-06-27 19:21:09,699 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3934, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4254, PETRI_PLACES=238, PETRI_TRANSITIONS=319} [2024-06-27 19:21:09,699 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 197 predicate places. [2024-06-27 19:21:09,699 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 319 transitions, 4254 flow [2024-06-27 19:21:09,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:21:09,699 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:21:09,699 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:21:09,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-27 19:21:09,700 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:21:09,700 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:21:09,700 INFO L85 PathProgramCache]: Analyzing trace with hash -1587312369, now seen corresponding path program 4 times [2024-06-27 19:21:09,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:21:09,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588378347] [2024-06-27 19:21:09,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:21:09,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:21:09,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:21:09,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:21:09,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:21:09,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588378347] [2024-06-27 19:21:09,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588378347] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:21:09,764 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:21:09,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:21:09,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508126709] [2024-06-27 19:21:09,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:21:09,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:21:09,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:21:09,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:21:09,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:21:09,800 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:21:09,800 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 319 transitions, 4254 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:21:09,801 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:21:09,801 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:21:09,801 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:21:10,292 INFO L124 PetriNetUnfolderBase]: 2287/3824 cut-off events. [2024-06-27 19:21:10,293 INFO L125 PetriNetUnfolderBase]: For 217378/217378 co-relation queries the response was YES. [2024-06-27 19:21:10,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25889 conditions, 3824 events. 2287/3824 cut-off events. For 217378/217378 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 23616 event pairs, 510 based on Foata normal form. 12/3831 useless extension candidates. Maximal degree in co-relation 25775. Up to 3192 conditions per place. [2024-06-27 19:21:10,333 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 243 selfloop transitions, 88 changer transitions 0/338 dead transitions. [2024-06-27 19:21:10,333 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 338 transitions, 5017 flow [2024-06-27 19:21:10,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:21:10,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:21:10,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 147 transitions. [2024-06-27 19:21:10,334 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6125 [2024-06-27 19:21:10,334 INFO L175 Difference]: Start difference. First operand has 238 places, 319 transitions, 4254 flow. Second operand 6 states and 147 transitions. [2024-06-27 19:21:10,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 338 transitions, 5017 flow [2024-06-27 19:21:10,828 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 338 transitions, 4861 flow, removed 36 selfloop flow, removed 2 redundant places. [2024-06-27 19:21:10,832 INFO L231 Difference]: Finished difference. Result has 242 places, 321 transitions, 4339 flow [2024-06-27 19:21:10,832 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4100, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=319, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4339, PETRI_PLACES=242, PETRI_TRANSITIONS=321} [2024-06-27 19:21:10,833 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 201 predicate places. [2024-06-27 19:21:10,833 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 321 transitions, 4339 flow [2024-06-27 19:21:10,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:21:10,833 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:21:10,833 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:21:10,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-27 19:21:10,833 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:21:10,834 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:21:10,834 INFO L85 PathProgramCache]: Analyzing trace with hash -1957778289, now seen corresponding path program 1 times [2024-06-27 19:21:10,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:21:10,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684388592] [2024-06-27 19:21:10,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:21:10,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:21:10,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:21:10,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:21:10,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:21:10,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684388592] [2024-06-27 19:21:10,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684388592] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:21:10,929 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:21:10,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:21:10,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419645589] [2024-06-27 19:21:10,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:21:10,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:21:10,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:21:10,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:21:10,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:21:10,963 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:21:10,964 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 321 transitions, 4339 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:21:10,964 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:21:10,964 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:21:10,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:21:11,518 INFO L124 PetriNetUnfolderBase]: 2462/4117 cut-off events. [2024-06-27 19:21:11,519 INFO L125 PetriNetUnfolderBase]: For 262704/262712 co-relation queries the response was YES. [2024-06-27 19:21:11,549 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28754 conditions, 4117 events. 2462/4117 cut-off events. For 262704/262712 co-relation queries the response was YES. Maximal size of possible extension queue 280. Compared 25644 event pairs, 455 based on Foata normal form. 18/4129 useless extension candidates. Maximal degree in co-relation 28638. Up to 3167 conditions per place. [2024-06-27 19:21:11,562 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 269 selfloop transitions, 83 changer transitions 0/359 dead transitions. [2024-06-27 19:21:11,563 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 359 transitions, 5376 flow [2024-06-27 19:21:11,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:21:11,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:21:11,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-27 19:21:11,564 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6178571428571429 [2024-06-27 19:21:11,564 INFO L175 Difference]: Start difference. First operand has 242 places, 321 transitions, 4339 flow. Second operand 7 states and 173 transitions. [2024-06-27 19:21:11,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 359 transitions, 5376 flow [2024-06-27 19:21:12,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 359 transitions, 5164 flow, removed 23 selfloop flow, removed 4 redundant places. [2024-06-27 19:21:12,141 INFO L231 Difference]: Finished difference. Result has 247 places, 330 transitions, 4463 flow [2024-06-27 19:21:12,141 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4127, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=321, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4463, PETRI_PLACES=247, PETRI_TRANSITIONS=330} [2024-06-27 19:21:12,142 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 206 predicate places. [2024-06-27 19:21:12,142 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 330 transitions, 4463 flow [2024-06-27 19:21:12,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:21:12,142 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:21:12,142 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:21:12,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-27 19:21:12,142 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:21:12,143 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:21:12,143 INFO L85 PathProgramCache]: Analyzing trace with hash 1522189323, now seen corresponding path program 2 times [2024-06-27 19:21:12,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:21:12,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40543004] [2024-06-27 19:21:12,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:21:12,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:21:12,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:21:12,212 INFO 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 19:21:12,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:21:12,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40543004] [2024-06-27 19:21:12,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40543004] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:21:12,213 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:21:12,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:21:12,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148805607] [2024-06-27 19:21:12,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:21:12,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:21:12,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:21:12,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:21:12,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:21:12,266 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:21:12,266 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 330 transitions, 4463 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:21:12,266 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:21:12,266 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:21:12,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:21:12,827 INFO L124 PetriNetUnfolderBase]: 2518/4219 cut-off events. [2024-06-27 19:21:12,827 INFO L125 PetriNetUnfolderBase]: For 280808/280816 co-relation queries the response was YES. [2024-06-27 19:21:12,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29692 conditions, 4219 events. 2518/4219 cut-off events. For 280808/280816 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 26602 event pairs, 584 based on Foata normal form. 22/4235 useless extension candidates. Maximal degree in co-relation 29573. Up to 3577 conditions per place. [2024-06-27 19:21:12,873 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 273 selfloop transitions, 73 changer transitions 0/353 dead transitions. [2024-06-27 19:21:12,873 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 353 transitions, 5256 flow [2024-06-27 19:21:12,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:21:12,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:21:12,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2024-06-27 19:21:12,874 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5928571428571429 [2024-06-27 19:21:12,874 INFO L175 Difference]: Start difference. First operand has 247 places, 330 transitions, 4463 flow. Second operand 7 states and 166 transitions. [2024-06-27 19:21:12,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 353 transitions, 5256 flow [2024-06-27 19:21:13,526 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 353 transitions, 5083 flow, removed 19 selfloop flow, removed 3 redundant places. [2024-06-27 19:21:13,530 INFO L231 Difference]: Finished difference. Result has 251 places, 332 transitions, 4485 flow [2024-06-27 19:21:13,531 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4290, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=330, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4485, PETRI_PLACES=251, PETRI_TRANSITIONS=332} [2024-06-27 19:21:13,531 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 210 predicate places. [2024-06-27 19:21:13,531 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 332 transitions, 4485 flow [2024-06-27 19:21:13,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:21:13,531 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:21:13,531 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:21:13,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-27 19:21:13,532 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:21:13,532 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:21:13,532 INFO L85 PathProgramCache]: Analyzing trace with hash 1521862893, now seen corresponding path program 3 times [2024-06-27 19:21:13,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:21:13,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609781760] [2024-06-27 19:21:13,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:21:13,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:21:13,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:21:13,593 INFO 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 19:21:13,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:21:13,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609781760] [2024-06-27 19:21:13,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609781760] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:21:13,593 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:21:13,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:21:13,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077661556] [2024-06-27 19:21:13,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:21:13,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:21:13,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:21:13,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:21:13,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:21:13,638 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:21:13,639 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 332 transitions, 4485 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:21:13,639 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:21:13,639 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:21:13,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:21:14,243 INFO L124 PetriNetUnfolderBase]: 2574/4315 cut-off events. [2024-06-27 19:21:14,243 INFO L125 PetriNetUnfolderBase]: For 282188/282196 co-relation queries the response was YES. [2024-06-27 19:21:14,275 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30318 conditions, 4315 events. 2574/4315 cut-off events. For 282188/282196 co-relation queries the response was YES. Maximal size of possible extension queue 290. Compared 27374 event pairs, 584 based on Foata normal form. 18/4327 useless extension candidates. Maximal degree in co-relation 30198. Up to 3605 conditions per place. [2024-06-27 19:21:14,290 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 277 selfloop transitions, 77 changer transitions 0/361 dead transitions. [2024-06-27 19:21:14,290 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 361 transitions, 5343 flow [2024-06-27 19:21:14,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:21:14,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:21:14,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-06-27 19:21:14,291 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6035714285714285 [2024-06-27 19:21:14,291 INFO L175 Difference]: Start difference. First operand has 251 places, 332 transitions, 4485 flow. Second operand 7 states and 169 transitions. [2024-06-27 19:21:14,291 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 361 transitions, 5343 flow [2024-06-27 19:21:14,911 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 361 transitions, 5183 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-27 19:21:14,915 INFO L231 Difference]: Finished difference. Result has 254 places, 337 transitions, 4578 flow [2024-06-27 19:21:14,916 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4325, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=332, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=255, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4578, PETRI_PLACES=254, PETRI_TRANSITIONS=337} [2024-06-27 19:21:14,916 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 213 predicate places. [2024-06-27 19:21:14,916 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 337 transitions, 4578 flow [2024-06-27 19:21:14,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:21:14,916 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:21:14,916 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:21:14,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-27 19:21:14,917 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:21:14,917 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:21:14,917 INFO L85 PathProgramCache]: Analyzing trace with hash -1732806749, now seen corresponding path program 4 times [2024-06-27 19:21:14,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:21:14,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105664973] [2024-06-27 19:21:14,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:21:14,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:21:14,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:21:14,982 INFO 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 19:21:14,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:21:14,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105664973] [2024-06-27 19:21:14,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105664973] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:21:14,982 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:21:14,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:21:14,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600003890] [2024-06-27 19:21:14,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:21:14,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:21:14,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:21:14,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:21:14,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:21:15,018 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:21:15,018 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 337 transitions, 4578 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:21:15,018 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:21:15,018 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:21:15,018 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:21:15,614 INFO L124 PetriNetUnfolderBase]: 2630/4400 cut-off events. [2024-06-27 19:21:15,614 INFO L125 PetriNetUnfolderBase]: For 299809/299812 co-relation queries the response was YES. [2024-06-27 19:21:15,647 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31062 conditions, 4400 events. 2630/4400 cut-off events. For 299809/299812 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 27947 event pairs, 624 based on Foata normal form. 18/4410 useless extension candidates. Maximal degree in co-relation 30940. Up to 3753 conditions per place. [2024-06-27 19:21:15,662 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 273 selfloop transitions, 73 changer transitions 0/353 dead transitions. [2024-06-27 19:21:15,662 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 353 transitions, 5357 flow [2024-06-27 19:21:15,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:21:15,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:21:15,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 141 transitions. [2024-06-27 19:21:15,663 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5875 [2024-06-27 19:21:15,663 INFO L175 Difference]: Start difference. First operand has 254 places, 337 transitions, 4578 flow. Second operand 6 states and 141 transitions. [2024-06-27 19:21:15,663 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 353 transitions, 5357 flow [2024-06-27 19:21:16,289 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 353 transitions, 5184 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-27 19:21:16,293 INFO L231 Difference]: Finished difference. Result has 256 places, 339 transitions, 4604 flow [2024-06-27 19:21:16,293 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4405, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=337, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4604, PETRI_PLACES=256, PETRI_TRANSITIONS=339} [2024-06-27 19:21:16,293 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 215 predicate places. [2024-06-27 19:21:16,294 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 339 transitions, 4604 flow [2024-06-27 19:21:16,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:21:16,294 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:21:16,294 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:21:16,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-27 19:21:16,294 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:21:16,294 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:21:16,295 INFO L85 PathProgramCache]: Analyzing trace with hash -1743531509, now seen corresponding path program 5 times [2024-06-27 19:21:16,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:21:16,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236367287] [2024-06-27 19:21:16,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:21:16,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:21:16,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:21:16,356 INFO 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 19:21:16,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:21:16,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236367287] [2024-06-27 19:21:16,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236367287] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:21:16,357 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:21:16,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:21:16,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437216827] [2024-06-27 19:21:16,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:21:16,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:21:16,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:21:16,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:21:16,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:21:16,397 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:21:16,397 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 339 transitions, 4604 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:21:16,397 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:21:16,397 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:21:16,397 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:21:17,015 INFO L124 PetriNetUnfolderBase]: 2591/4346 cut-off events. [2024-06-27 19:21:17,015 INFO L125 PetriNetUnfolderBase]: For 276914/276922 co-relation queries the response was YES. [2024-06-27 19:21:17,050 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29754 conditions, 4346 events. 2591/4346 cut-off events. For 276914/276922 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 27608 event pairs, 587 based on Foata normal form. 22/4362 useless extension candidates. Maximal degree in co-relation 29631. Up to 3632 conditions per place. [2024-06-27 19:21:17,065 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 276 selfloop transitions, 76 changer transitions 0/359 dead transitions. [2024-06-27 19:21:17,065 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 359 transitions, 5368 flow [2024-06-27 19:21:17,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:21:17,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:21:17,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 147 transitions. [2024-06-27 19:21:17,066 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6125 [2024-06-27 19:21:17,066 INFO L175 Difference]: Start difference. First operand has 256 places, 339 transitions, 4604 flow. Second operand 6 states and 147 transitions. [2024-06-27 19:21:17,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 359 transitions, 5368 flow [2024-06-27 19:21:17,681 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 359 transitions, 5204 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-27 19:21:17,685 INFO L231 Difference]: Finished difference. Result has 258 places, 339 transitions, 4602 flow [2024-06-27 19:21:17,685 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4440, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=339, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4602, PETRI_PLACES=258, PETRI_TRANSITIONS=339} [2024-06-27 19:21:17,686 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 217 predicate places. [2024-06-27 19:21:17,686 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 339 transitions, 4602 flow [2024-06-27 19:21:17,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:21:17,686 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:21:17,686 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:21:17,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-27 19:21:17,686 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:21:17,687 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:21:17,687 INFO L85 PathProgramCache]: Analyzing trace with hash -1743857939, now seen corresponding path program 6 times [2024-06-27 19:21:17,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:21:17,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031655385] [2024-06-27 19:21:17,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:21:17,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:21:17,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:21:17,751 INFO 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 19:21:17,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:21:17,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031655385] [2024-06-27 19:21:17,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031655385] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:21:17,752 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:21:17,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:21:17,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756160558] [2024-06-27 19:21:17,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:21:17,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:21:17,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:21:17,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:21:17,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:21:17,785 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:21:17,786 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 339 transitions, 4602 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:21:17,786 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:21:17,786 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:21:17,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:21:18,373 INFO L124 PetriNetUnfolderBase]: 2565/4294 cut-off events. [2024-06-27 19:21:18,373 INFO L125 PetriNetUnfolderBase]: For 251205/251213 co-relation queries the response was YES. [2024-06-27 19:21:18,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28841 conditions, 4294 events. 2565/4294 cut-off events. For 251205/251213 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 27094 event pairs, 439 based on Foata normal form. 18/4306 useless extension candidates. Maximal degree in co-relation 28717. Up to 3230 conditions per place. [2024-06-27 19:21:18,419 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 266 selfloop transitions, 92 changer transitions 0/365 dead transitions. [2024-06-27 19:21:18,419 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 365 transitions, 5398 flow [2024-06-27 19:21:18,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:21:18,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:21:18,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-06-27 19:21:18,420 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6375 [2024-06-27 19:21:18,420 INFO L175 Difference]: Start difference. First operand has 258 places, 339 transitions, 4602 flow. Second operand 6 states and 153 transitions. [2024-06-27 19:21:18,420 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 365 transitions, 5398 flow [2024-06-27 19:21:19,085 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 365 transitions, 5212 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-27 19:21:19,090 INFO L231 Difference]: Finished difference. Result has 260 places, 339 transitions, 4611 flow [2024-06-27 19:21:19,090 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4416, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=339, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4611, PETRI_PLACES=260, PETRI_TRANSITIONS=339} [2024-06-27 19:21:19,090 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 219 predicate places. [2024-06-27 19:21:19,091 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 339 transitions, 4611 flow [2024-06-27 19:21:19,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:21:19,091 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:21:19,091 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:21:19,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-27 19:21:19,091 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:21:19,091 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:21:19,091 INFO L85 PathProgramCache]: Analyzing trace with hash 1502298395, now seen corresponding path program 1 times [2024-06-27 19:21:19,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:21:19,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673901990] [2024-06-27 19:21:19,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:21:19,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:21:19,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:21:19,150 INFO 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 19:21:19,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:21:19,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673901990] [2024-06-27 19:21:19,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673901990] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:21:19,151 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:21:19,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:21:19,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807132016] [2024-06-27 19:21:19,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:21:19,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:21:19,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:21:19,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:21:19,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:21:19,199 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:21:19,200 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 339 transitions, 4611 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:21:19,200 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:21:19,200 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:21:19,200 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:21:19,809 INFO L124 PetriNetUnfolderBase]: 2626/4369 cut-off events. [2024-06-27 19:21:19,809 INFO L125 PetriNetUnfolderBase]: For 242116/242116 co-relation queries the response was YES. [2024-06-27 19:21:19,842 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29947 conditions, 4369 events. 2626/4369 cut-off events. For 242116/242116 co-relation queries the response was YES. Maximal size of possible extension queue 306. Compared 27534 event pairs, 582 based on Foata normal form. 1/4350 useless extension candidates. Maximal degree in co-relation 29822. Up to 3448 conditions per place. [2024-06-27 19:21:19,856 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 196 selfloop transitions, 183 changer transitions 0/386 dead transitions. [2024-06-27 19:21:19,857 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 386 transitions, 6264 flow [2024-06-27 19:21:19,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:21:19,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:21:19,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-27 19:21:19,858 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6392857142857142 [2024-06-27 19:21:19,858 INFO L175 Difference]: Start difference. First operand has 260 places, 339 transitions, 4611 flow. Second operand 7 states and 179 transitions. [2024-06-27 19:21:19,858 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 386 transitions, 6264 flow [2024-06-27 19:21:20,599 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 386 transitions, 6054 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-27 19:21:20,604 INFO L231 Difference]: Finished difference. Result has 262 places, 359 transitions, 5114 flow [2024-06-27 19:21:20,604 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4417, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=339, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=163, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5114, PETRI_PLACES=262, PETRI_TRANSITIONS=359} [2024-06-27 19:21:20,604 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 221 predicate places. [2024-06-27 19:21:20,604 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 359 transitions, 5114 flow [2024-06-27 19:21:20,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:21:20,605 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:21:20,605 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:21:20,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-27 19:21:20,605 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:21:20,605 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:21:20,605 INFO L85 PathProgramCache]: Analyzing trace with hash 1509515117, now seen corresponding path program 2 times [2024-06-27 19:21:20,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:21:20,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850810262] [2024-06-27 19:21:20,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:21:20,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:21:20,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:21:20,659 INFO 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 19:21:20,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:21:20,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850810262] [2024-06-27 19:21:20,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850810262] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:21:20,659 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:21:20,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:21:20,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325098238] [2024-06-27 19:21:20,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:21:20,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:21:20,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:21:20,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:21:20,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:21:20,687 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:21:20,687 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 359 transitions, 5114 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:21:20,688 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:21:20,688 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:21:20,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:21:21,286 INFO L124 PetriNetUnfolderBase]: 2623/4364 cut-off events. [2024-06-27 19:21:21,286 INFO L125 PetriNetUnfolderBase]: For 233934/233934 co-relation queries the response was YES. [2024-06-27 19:21:21,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29809 conditions, 4364 events. 2623/4364 cut-off events. For 233934/233934 co-relation queries the response was YES. Maximal size of possible extension queue 306. Compared 27507 event pairs, 582 based on Foata normal form. 1/4345 useless extension candidates. Maximal degree in co-relation 29684. Up to 3446 conditions per place. [2024-06-27 19:21:21,334 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 187 selfloop transitions, 194 changer transitions 0/388 dead transitions. [2024-06-27 19:21:21,335 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 388 transitions, 6320 flow [2024-06-27 19:21:21,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:21:21,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:21:21,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 182 transitions. [2024-06-27 19:21:21,335 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.65 [2024-06-27 19:21:21,336 INFO L175 Difference]: Start difference. First operand has 262 places, 359 transitions, 5114 flow. Second operand 7 states and 182 transitions. [2024-06-27 19:21:21,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 388 transitions, 6320 flow [2024-06-27 19:21:22,001 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 388 transitions, 6056 flow, removed 31 selfloop flow, removed 2 redundant places. [2024-06-27 19:21:22,006 INFO L231 Difference]: Finished difference. Result has 267 places, 359 transitions, 5244 flow [2024-06-27 19:21:22,006 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4850, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=359, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=194, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5244, PETRI_PLACES=267, PETRI_TRANSITIONS=359} [2024-06-27 19:21:22,007 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 226 predicate places. [2024-06-27 19:21:22,007 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 359 transitions, 5244 flow [2024-06-27 19:21:22,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:21:22,007 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:21:22,007 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:21:22,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-27 19:21:22,007 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:21:22,008 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:21:22,008 INFO L85 PathProgramCache]: Analyzing trace with hash 1509635087, now seen corresponding path program 3 times [2024-06-27 19:21:22,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:21:22,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943217446] [2024-06-27 19:21:22,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:21:22,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:21:22,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:21:22,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:21:22,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:21:22,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943217446] [2024-06-27 19:21:22,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943217446] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:21:22,068 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:21:22,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:21:22,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285427177] [2024-06-27 19:21:22,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:21:22,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:21:22,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:21:22,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:21:22,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:21:22,120 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:21:22,121 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 359 transitions, 5244 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:21:22,121 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:21:22,121 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:21:22,121 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:21:22,773 INFO L124 PetriNetUnfolderBase]: 2628/4381 cut-off events. [2024-06-27 19:21:22,773 INFO L125 PetriNetUnfolderBase]: For 241609/241612 co-relation queries the response was YES. [2024-06-27 19:21:22,808 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30090 conditions, 4381 events. 2628/4381 cut-off events. For 241609/241612 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 27715 event pairs, 555 based on Foata normal form. 3/4373 useless extension candidates. Maximal degree in co-relation 29964. Up to 3806 conditions per place. [2024-06-27 19:21:22,821 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 292 selfloop transitions, 86 changer transitions 0/385 dead transitions. [2024-06-27 19:21:22,822 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 385 transitions, 6117 flow [2024-06-27 19:21:22,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:21:22,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:21:22,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-27 19:21:22,823 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6142857142857143 [2024-06-27 19:21:22,823 INFO L175 Difference]: Start difference. First operand has 267 places, 359 transitions, 5244 flow. Second operand 7 states and 172 transitions. [2024-06-27 19:21:22,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 385 transitions, 6117 flow [2024-06-27 19:21:23,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 385 transitions, 5499 flow, removed 25 selfloop flow, removed 7 redundant places. [2024-06-27 19:21:23,521 INFO L231 Difference]: Finished difference. Result has 267 places, 362 transitions, 4869 flow [2024-06-27 19:21:23,521 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4639, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=359, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=273, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4869, PETRI_PLACES=267, PETRI_TRANSITIONS=362} [2024-06-27 19:21:23,521 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 226 predicate places. [2024-06-27 19:21:23,521 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 362 transitions, 4869 flow [2024-06-27 19:21:23,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:21:23,522 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:21:23,522 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:21:23,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-27 19:21:23,522 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:21:23,522 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:21:23,522 INFO L85 PathProgramCache]: Analyzing trace with hash 1515176027, now seen corresponding path program 4 times [2024-06-27 19:21:23,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:21:23,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678060884] [2024-06-27 19:21:23,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:21:23,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:21:23,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:21:23,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:21:23,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:21:23,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678060884] [2024-06-27 19:21:23,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678060884] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:21:23,576 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:21:23,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:21:23,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123304690] [2024-06-27 19:21:23,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:21:23,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:21:23,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:21:23,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:21:23,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:21:23,602 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:21:23,602 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 362 transitions, 4869 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:21:23,602 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:21:23,603 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:21:23,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:21:24,215 INFO L124 PetriNetUnfolderBase]: 2625/4369 cut-off events. [2024-06-27 19:21:24,215 INFO L125 PetriNetUnfolderBase]: For 243343/243343 co-relation queries the response was YES. [2024-06-27 19:21:24,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29438 conditions, 4369 events. 2625/4369 cut-off events. For 243343/243343 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 27581 event pairs, 582 based on Foata normal form. 1/4350 useless extension candidates. Maximal degree in co-relation 29312. Up to 3448 conditions per place. [2024-06-27 19:21:24,263 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 197 selfloop transitions, 181 changer transitions 0/385 dead transitions. [2024-06-27 19:21:24,263 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 385 transitions, 6065 flow [2024-06-27 19:21:24,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:21:24,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:21:24,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-06-27 19:21:24,264 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6214285714285714 [2024-06-27 19:21:24,264 INFO L175 Difference]: Start difference. First operand has 267 places, 362 transitions, 4869 flow. Second operand 7 states and 174 transitions. [2024-06-27 19:21:24,264 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 385 transitions, 6065 flow [2024-06-27 19:21:24,918 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 385 transitions, 5875 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-27 19:21:24,923 INFO L231 Difference]: Finished difference. Result has 268 places, 362 transitions, 5048 flow [2024-06-27 19:21:24,923 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4679, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=362, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=181, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5048, PETRI_PLACES=268, PETRI_TRANSITIONS=362} [2024-06-27 19:21:24,924 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 227 predicate places. [2024-06-27 19:21:24,924 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 362 transitions, 5048 flow [2024-06-27 19:21:24,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:21:24,924 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:21:24,924 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:21:24,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-27 19:21:24,924 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:21:24,925 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:21:24,925 INFO L85 PathProgramCache]: Analyzing trace with hash 1518889517, now seen corresponding path program 5 times [2024-06-27 19:21:24,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:21:24,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591866917] [2024-06-27 19:21:24,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:21:24,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:21:24,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:21:24,983 INFO 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 19:21:24,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:21:24,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591866917] [2024-06-27 19:21:24,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591866917] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:21:24,983 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:21:24,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:21:24,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226199267] [2024-06-27 19:21:24,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:21:24,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:21:24,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:21:24,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:21:24,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:21:25,023 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:21:25,023 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 362 transitions, 5048 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:21:25,024 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:21:25,024 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:21:25,024 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:21:25,727 INFO L124 PetriNetUnfolderBase]: 2622/4373 cut-off events. [2024-06-27 19:21:25,727 INFO L125 PetriNetUnfolderBase]: For 249406/249409 co-relation queries the response was YES. [2024-06-27 19:21:25,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29755 conditions, 4373 events. 2622/4373 cut-off events. For 249406/249409 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 27718 event pairs, 555 based on Foata normal form. 3/4365 useless extension candidates. Maximal degree in co-relation 29629. Up to 3772 conditions per place. [2024-06-27 19:21:25,773 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 279 selfloop transitions, 97 changer transitions 0/383 dead transitions. [2024-06-27 19:21:25,774 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 383 transitions, 5990 flow [2024-06-27 19:21:25,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:21:25,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:21:25,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 203 transitions. [2024-06-27 19:21:25,776 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5638888888888889 [2024-06-27 19:21:25,776 INFO L175 Difference]: Start difference. First operand has 268 places, 362 transitions, 5048 flow. Second operand 9 states and 203 transitions. [2024-06-27 19:21:25,776 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 383 transitions, 5990 flow [2024-06-27 19:21:26,602 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 383 transitions, 5669 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-27 19:21:26,607 INFO L231 Difference]: Finished difference. Result has 274 places, 363 transitions, 4962 flow [2024-06-27 19:21:26,607 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4727, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=362, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=265, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4962, PETRI_PLACES=274, PETRI_TRANSITIONS=363} [2024-06-27 19:21:26,607 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 233 predicate places. [2024-06-27 19:21:26,607 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 363 transitions, 4962 flow [2024-06-27 19:21:26,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:21:26,608 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:21:26,608 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:21:26,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-27 19:21:26,608 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:21:26,608 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:21:26,608 INFO L85 PathProgramCache]: Analyzing trace with hash -65971497, now seen corresponding path program 6 times [2024-06-27 19:21:26,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:21:26,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340457031] [2024-06-27 19:21:26,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:21:26,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:21:26,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:21:26,671 INFO 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 19:21:26,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:21:26,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340457031] [2024-06-27 19:21:26,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340457031] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:21:26,671 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:21:26,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:21:26,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089079652] [2024-06-27 19:21:26,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:21:26,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:21:26,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:21:26,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:21:26,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:21:26,705 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:21:26,705 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 363 transitions, 4962 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:21:26,705 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:21:26,705 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:21:26,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:21:27,356 INFO L124 PetriNetUnfolderBase]: 2619/4369 cut-off events. [2024-06-27 19:21:27,356 INFO L125 PetriNetUnfolderBase]: For 253387/253390 co-relation queries the response was YES. [2024-06-27 19:21:27,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29542 conditions, 4369 events. 2619/4369 cut-off events. For 253387/253390 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 27654 event pairs, 555 based on Foata normal form. 3/4361 useless extension candidates. Maximal degree in co-relation 29414. Up to 3769 conditions per place. [2024-06-27 19:21:27,406 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 281 selfloop transitions, 92 changer transitions 0/380 dead transitions. [2024-06-27 19:21:27,406 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 380 transitions, 5750 flow [2024-06-27 19:21:27,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:21:27,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:21:27,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 165 transitions. [2024-06-27 19:21:27,407 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5892857142857143 [2024-06-27 19:21:27,407 INFO L175 Difference]: Start difference. First operand has 274 places, 363 transitions, 4962 flow. Second operand 7 states and 165 transitions. [2024-06-27 19:21:27,407 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 380 transitions, 5750 flow [2024-06-27 19:21:28,148 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 380 transitions, 5578 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-27 19:21:28,153 INFO L231 Difference]: Finished difference. Result has 277 places, 363 transitions, 4982 flow [2024-06-27 19:21:28,153 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4790, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=363, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4982, PETRI_PLACES=277, PETRI_TRANSITIONS=363} [2024-06-27 19:21:28,153 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 236 predicate places. [2024-06-27 19:21:28,153 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 363 transitions, 4982 flow [2024-06-27 19:21:28,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:21:28,154 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:21:28,154 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:21:28,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-27 19:21:28,154 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:21:28,154 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:21:28,154 INFO L85 PathProgramCache]: Analyzing trace with hash -429810129, now seen corresponding path program 1 times [2024-06-27 19:21:28,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:21:28,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722974976] [2024-06-27 19:21:28,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:21:28,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:21:28,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:21:28,214 INFO 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 19:21:28,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:21:28,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722974976] [2024-06-27 19:21:28,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722974976] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:21:28,215 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:21:28,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:21:28,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224546258] [2024-06-27 19:21:28,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:21:28,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:21:28,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:21:28,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:21:28,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:21:28,247 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:21:28,248 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 363 transitions, 4982 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:21:28,248 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:21:28,248 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:21:28,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:21:28,862 INFO L124 PetriNetUnfolderBase]: 2586/4329 cut-off events. [2024-06-27 19:21:28,862 INFO L125 PetriNetUnfolderBase]: For 260780/260783 co-relation queries the response was YES. [2024-06-27 19:21:28,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28623 conditions, 4329 events. 2586/4329 cut-off events. For 260780/260783 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 27467 event pairs, 542 based on Foata normal form. 14/4335 useless extension candidates. Maximal degree in co-relation 28494. Up to 3246 conditions per place. [2024-06-27 19:21:28,910 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 288 selfloop transitions, 85 changer transitions 0/380 dead transitions. [2024-06-27 19:21:28,910 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 380 transitions, 5784 flow [2024-06-27 19:21:28,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:21:28,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:21:28,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 144 transitions. [2024-06-27 19:21:28,911 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-27 19:21:28,911 INFO L175 Difference]: Start difference. First operand has 277 places, 363 transitions, 4982 flow. Second operand 6 states and 144 transitions. [2024-06-27 19:21:28,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 380 transitions, 5784 flow [2024-06-27 19:21:29,612 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 380 transitions, 5590 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-27 19:21:29,616 INFO L231 Difference]: Finished difference. Result has 277 places, 363 transitions, 4967 flow [2024-06-27 19:21:29,617 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4788, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=363, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=278, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4967, PETRI_PLACES=277, PETRI_TRANSITIONS=363} [2024-06-27 19:21:29,617 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 236 predicate places. [2024-06-27 19:21:29,617 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 363 transitions, 4967 flow [2024-06-27 19:21:29,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:21:29,617 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:21:29,617 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:21:29,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-27 19:21:29,618 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:21:29,618 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:21:29,618 INFO L85 PathProgramCache]: Analyzing trace with hash 1720298571, now seen corresponding path program 7 times [2024-06-27 19:21:29,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:21:29,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968328249] [2024-06-27 19:21:29,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:21:29,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:21:29,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:21:29,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:21:29,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:21:29,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968328249] [2024-06-27 19:21:29,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968328249] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:21:29,670 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:21:29,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:21:29,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183948848] [2024-06-27 19:21:29,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:21:29,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:21:29,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:21:29,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:21:29,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:21:29,698 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:21:29,698 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 363 transitions, 4967 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:21:29,698 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:21:29,698 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:21:29,698 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:21:30,293 INFO L124 PetriNetUnfolderBase]: 2591/4338 cut-off events. [2024-06-27 19:21:30,293 INFO L125 PetriNetUnfolderBase]: For 242397/242400 co-relation queries the response was YES. [2024-06-27 19:21:30,329 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28869 conditions, 4338 events. 2591/4338 cut-off events. For 242397/242400 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 27579 event pairs, 588 based on Foata normal form. 3/4333 useless extension candidates. Maximal degree in co-relation 28739. Up to 3397 conditions per place. [2024-06-27 19:21:30,344 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 224 selfloop transitions, 157 changer transitions 0/388 dead transitions. [2024-06-27 19:21:30,344 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 388 transitions, 6101 flow [2024-06-27 19:21:30,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:21:30,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:21:30,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-27 19:21:30,345 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6107142857142858 [2024-06-27 19:21:30,345 INFO L175 Difference]: Start difference. First operand has 277 places, 363 transitions, 4967 flow. Second operand 7 states and 171 transitions. [2024-06-27 19:21:30,345 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 388 transitions, 6101 flow [2024-06-27 19:21:31,055 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 388 transitions, 5866 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-27 19:21:31,060 INFO L231 Difference]: Finished difference. Result has 278 places, 366 transitions, 5098 flow [2024-06-27 19:21:31,060 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4732, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=363, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=154, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5098, PETRI_PLACES=278, PETRI_TRANSITIONS=366} [2024-06-27 19:21:31,061 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 237 predicate places. [2024-06-27 19:21:31,061 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 366 transitions, 5098 flow [2024-06-27 19:21:31,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:21:31,061 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:21:31,061 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:21:31,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-27 19:21:31,062 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:21:31,062 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:21:31,062 INFO L85 PathProgramCache]: Analyzing trace with hash 1720597101, now seen corresponding path program 8 times [2024-06-27 19:21:31,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:21:31,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085184915] [2024-06-27 19:21:31,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:21:31,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:21:31,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:21:31,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:21:31,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:21:31,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085184915] [2024-06-27 19:21:31,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085184915] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:21:31,133 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:21:31,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:21:31,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500341627] [2024-06-27 19:21:31,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:21:31,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:21:31,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:21:31,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:21:31,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:21:31,160 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:21:31,161 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 366 transitions, 5098 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:21:31,161 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:21:31,161 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:21:31,161 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:21:31,764 INFO L124 PetriNetUnfolderBase]: 2596/4347 cut-off events. [2024-06-27 19:21:31,765 INFO L125 PetriNetUnfolderBase]: For 247914/247917 co-relation queries the response was YES. [2024-06-27 19:21:31,799 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28817 conditions, 4347 events. 2596/4347 cut-off events. For 247914/247917 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 27651 event pairs, 588 based on Foata normal form. 3/4342 useless extension candidates. Maximal degree in co-relation 28687. Up to 3401 conditions per place. [2024-06-27 19:21:31,813 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 224 selfloop transitions, 157 changer transitions 0/388 dead transitions. [2024-06-27 19:21:31,814 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 388 transitions, 6234 flow [2024-06-27 19:21:31,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:21:31,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:21:31,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-27 19:21:31,815 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-27 19:21:31,815 INFO L175 Difference]: Start difference. First operand has 278 places, 366 transitions, 5098 flow. Second operand 7 states and 168 transitions. [2024-06-27 19:21:31,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 388 transitions, 6234 flow [2024-06-27 19:21:32,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 388 transitions, 5846 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-27 19:21:32,515 INFO L231 Difference]: Finished difference. Result has 280 places, 369 transitions, 5082 flow [2024-06-27 19:21:32,516 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4722, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=154, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5082, PETRI_PLACES=280, PETRI_TRANSITIONS=369} [2024-06-27 19:21:32,516 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 239 predicate places. [2024-06-27 19:21:32,516 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 369 transitions, 5082 flow [2024-06-27 19:21:32,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:21:32,516 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:21:32,516 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:21:32,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-27 19:21:32,517 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:21:32,517 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:21:32,517 INFO L85 PathProgramCache]: Analyzing trace with hash -503547387, now seen corresponding path program 9 times [2024-06-27 19:21:32,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:21:32,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701840589] [2024-06-27 19:21:32,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:21:32,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:21:32,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:21:32,569 INFO 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 19:21:32,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:21:32,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701840589] [2024-06-27 19:21:32,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701840589] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:21:32,569 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:21:32,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:21:32,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090066818] [2024-06-27 19:21:32,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:21:32,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:21:32,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:21:32,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:21:32,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:21:32,599 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:21:32,599 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 369 transitions, 5082 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:21:32,600 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:21:32,600 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:21:32,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:21:33,181 INFO L124 PetriNetUnfolderBase]: 2590/4339 cut-off events. [2024-06-27 19:21:33,182 INFO L125 PetriNetUnfolderBase]: For 250865/250868 co-relation queries the response was YES. [2024-06-27 19:21:33,217 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28641 conditions, 4339 events. 2590/4339 cut-off events. For 250865/250868 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 27623 event pairs, 588 based on Foata normal form. 4/4335 useless extension candidates. Maximal degree in co-relation 28510. Up to 3396 conditions per place. [2024-06-27 19:21:33,231 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 230 selfloop transitions, 148 changer transitions 0/385 dead transitions. [2024-06-27 19:21:33,231 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 385 transitions, 6156 flow [2024-06-27 19:21:33,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:21:33,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:21:33,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2024-06-27 19:21:33,232 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5928571428571429 [2024-06-27 19:21:33,232 INFO L175 Difference]: Start difference. First operand has 280 places, 369 transitions, 5082 flow. Second operand 7 states and 166 transitions. [2024-06-27 19:21:33,232 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 385 transitions, 6156 flow [2024-06-27 19:21:33,982 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 385 transitions, 5856 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-27 19:21:33,987 INFO L231 Difference]: Finished difference. Result has 283 places, 369 transitions, 5085 flow [2024-06-27 19:21:33,987 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4782, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=369, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5085, PETRI_PLACES=283, PETRI_TRANSITIONS=369} [2024-06-27 19:21:33,988 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 242 predicate places. [2024-06-27 19:21:33,988 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 369 transitions, 5085 flow [2024-06-27 19:21:33,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:21:33,988 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:21:33,988 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:21:33,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-27 19:21:33,988 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:21:33,989 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:21:33,989 INFO L85 PathProgramCache]: Analyzing trace with hash -629975693, now seen corresponding path program 10 times [2024-06-27 19:21:33,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:21:33,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042733370] [2024-06-27 19:21:33,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:21:33,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:21:33,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:21:34,046 INFO 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 19:21:34,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:21:34,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042733370] [2024-06-27 19:21:34,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042733370] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:21:34,046 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:21:34,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:21:34,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049931003] [2024-06-27 19:21:34,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:21:34,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:21:34,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:21:34,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:21:34,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:21:34,081 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:21:34,081 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 369 transitions, 5085 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:21:34,081 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:21:34,082 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:21:34,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:21:34,687 INFO L124 PetriNetUnfolderBase]: 2584/4331 cut-off events. [2024-06-27 19:21:34,687 INFO L125 PetriNetUnfolderBase]: For 252292/252295 co-relation queries the response was YES. [2024-06-27 19:21:34,724 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28530 conditions, 4331 events. 2584/4331 cut-off events. For 252292/252295 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 27568 event pairs, 588 based on Foata normal form. 4/4327 useless extension candidates. Maximal degree in co-relation 28398. Up to 3466 conditions per place. [2024-06-27 19:21:34,738 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 251 selfloop transitions, 131 changer transitions 0/389 dead transitions. [2024-06-27 19:21:34,739 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 389 transitions, 6041 flow [2024-06-27 19:21:34,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:21:34,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:21:34,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 152 transitions. [2024-06-27 19:21:34,740 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6333333333333333 [2024-06-27 19:21:34,740 INFO L175 Difference]: Start difference. First operand has 283 places, 369 transitions, 5085 flow. Second operand 6 states and 152 transitions. [2024-06-27 19:21:34,740 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 389 transitions, 6041 flow [2024-06-27 19:21:35,707 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 389 transitions, 5736 flow, removed 23 selfloop flow, removed 4 redundant places. [2024-06-27 19:21:35,712 INFO L231 Difference]: Finished difference. Result has 285 places, 369 transitions, 5054 flow [2024-06-27 19:21:35,712 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4780, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=369, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5054, PETRI_PLACES=285, PETRI_TRANSITIONS=369} [2024-06-27 19:21:35,713 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 244 predicate places. [2024-06-27 19:21:35,713 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 369 transitions, 5054 flow [2024-06-27 19:21:35,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:21:35,713 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:21:35,713 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:21:35,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-27 19:21:35,713 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:21:35,714 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:21:35,714 INFO L85 PathProgramCache]: Analyzing trace with hash -630183083, now seen corresponding path program 11 times [2024-06-27 19:21:35,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:21:35,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011106967] [2024-06-27 19:21:35,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:21:35,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:21:35,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:21:35,771 INFO 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 19:21:35,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:21:35,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011106967] [2024-06-27 19:21:35,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011106967] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:21:35,772 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:21:35,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:21:35,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233392413] [2024-06-27 19:21:35,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:21:35,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:21:35,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:21:35,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:21:35,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:21:35,808 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:21:35,808 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 369 transitions, 5054 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:21:35,808 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:21:35,808 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:21:35,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:21:36,486 INFO L124 PetriNetUnfolderBase]: 2578/4312 cut-off events. [2024-06-27 19:21:36,487 INFO L125 PetriNetUnfolderBase]: For 251101/251104 co-relation queries the response was YES. [2024-06-27 19:21:36,521 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28343 conditions, 4312 events. 2578/4312 cut-off events. For 251101/251104 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 27377 event pairs, 534 based on Foata normal form. 4/4305 useless extension candidates. Maximal degree in co-relation 28210. Up to 3461 conditions per place. [2024-06-27 19:21:36,534 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 216 selfloop transitions, 185 changer transitions 0/408 dead transitions. [2024-06-27 19:21:36,535 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 408 transitions, 6242 flow [2024-06-27 19:21:36,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:21:36,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:21:36,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 232 transitions. [2024-06-27 19:21:36,536 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6444444444444445 [2024-06-27 19:21:36,536 INFO L175 Difference]: Start difference. First operand has 285 places, 369 transitions, 5054 flow. Second operand 9 states and 232 transitions. [2024-06-27 19:21:36,536 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 408 transitions, 6242 flow [2024-06-27 19:21:37,321 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 408 transitions, 5917 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-27 19:21:37,325 INFO L231 Difference]: Finished difference. Result has 287 places, 369 transitions, 5122 flow [2024-06-27 19:21:37,326 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4733, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=369, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=185, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5122, PETRI_PLACES=287, PETRI_TRANSITIONS=369} [2024-06-27 19:21:37,326 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 246 predicate places. [2024-06-27 19:21:37,326 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 369 transitions, 5122 flow [2024-06-27 19:21:37,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:21:37,326 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:21:37,326 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:21:37,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-27 19:21:37,327 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:21:37,327 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:21:37,327 INFO L85 PathProgramCache]: Analyzing trace with hash 353302939, now seen corresponding path program 12 times [2024-06-27 19:21:37,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:21:37,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559313990] [2024-06-27 19:21:37,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:21:37,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:21:37,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:21:37,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:21:37,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:21:37,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559313990] [2024-06-27 19:21:37,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559313990] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:21:37,386 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:21:37,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:21:37,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543059159] [2024-06-27 19:21:37,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:21:37,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:21:37,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:21:37,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:21:37,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:21:37,411 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:21:37,412 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 369 transitions, 5122 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:21:37,412 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:21:37,412 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:21:37,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:21:38,022 INFO L124 PetriNetUnfolderBase]: 2572/4304 cut-off events. [2024-06-27 19:21:38,022 INFO L125 PetriNetUnfolderBase]: For 245378/245381 co-relation queries the response was YES. [2024-06-27 19:21:38,058 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28291 conditions, 4304 events. 2572/4304 cut-off events. For 245378/245381 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 27329 event pairs, 534 based on Foata normal form. 4/4297 useless extension candidates. Maximal degree in co-relation 28158. Up to 3456 conditions per place. [2024-06-27 19:21:38,072 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 226 selfloop transitions, 167 changer transitions 0/400 dead transitions. [2024-06-27 19:21:38,072 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 400 transitions, 6130 flow [2024-06-27 19:21:38,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:21:38,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:21:38,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 205 transitions. [2024-06-27 19:21:38,073 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.640625 [2024-06-27 19:21:38,073 INFO L175 Difference]: Start difference. First operand has 287 places, 369 transitions, 5122 flow. Second operand 8 states and 205 transitions. [2024-06-27 19:21:38,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 400 transitions, 6130 flow [2024-06-27 19:21:38,736 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 400 transitions, 5684 flow, removed 12 selfloop flow, removed 11 redundant places. [2024-06-27 19:21:38,740 INFO L231 Difference]: Finished difference. Result has 284 places, 369 transitions, 5036 flow [2024-06-27 19:21:38,741 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4682, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=369, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=167, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5036, PETRI_PLACES=284, PETRI_TRANSITIONS=369} [2024-06-27 19:21:38,741 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 243 predicate places. [2024-06-27 19:21:38,741 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 369 transitions, 5036 flow [2024-06-27 19:21:38,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:21:38,741 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:21:38,742 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:21:38,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-27 19:21:38,742 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:21:38,742 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:21:38,742 INFO L85 PathProgramCache]: Analyzing trace with hash 1042640653, now seen corresponding path program 2 times [2024-06-27 19:21:38,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:21:38,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519667853] [2024-06-27 19:21:38,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:21:38,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:21:38,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:21:38,819 INFO 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 19:21:38,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:21:38,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519667853] [2024-06-27 19:21:38,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519667853] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:21:38,819 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:21:38,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:21:38,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836020904] [2024-06-27 19:21:38,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:21:38,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:21:38,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:21:38,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:21:38,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:21:38,873 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:21:38,874 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 369 transitions, 5036 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:21:38,874 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:21:38,874 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:21:38,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:21:39,504 INFO L124 PetriNetUnfolderBase]: 2546/4268 cut-off events. [2024-06-27 19:21:39,505 INFO L125 PetriNetUnfolderBase]: For 228412/228415 co-relation queries the response was YES. [2024-06-27 19:21:39,535 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27034 conditions, 4268 events. 2546/4268 cut-off events. For 228412/228415 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 26946 event pairs, 373 based on Foata normal form. 14/4271 useless extension candidates. Maximal degree in co-relation 26903. Up to 3275 conditions per place. [2024-06-27 19:21:39,547 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 303 selfloop transitions, 88 changer transitions 0/398 dead transitions. [2024-06-27 19:21:39,547 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 398 transitions, 6087 flow [2024-06-27 19:21:39,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:21:39,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:21:39,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 156 transitions. [2024-06-27 19:21:39,548 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.65 [2024-06-27 19:21:39,548 INFO L175 Difference]: Start difference. First operand has 284 places, 369 transitions, 5036 flow. Second operand 6 states and 156 transitions. [2024-06-27 19:21:39,548 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 398 transitions, 6087 flow [2024-06-27 19:21:40,211 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 398 transitions, 5643 flow, removed 4 selfloop flow, removed 11 redundant places. [2024-06-27 19:21:40,216 INFO L231 Difference]: Finished difference. Result has 280 places, 371 transitions, 4861 flow [2024-06-27 19:21:40,216 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4596, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=369, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=282, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4861, PETRI_PLACES=280, PETRI_TRANSITIONS=371} [2024-06-27 19:21:40,217 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 239 predicate places. [2024-06-27 19:21:40,217 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 371 transitions, 4861 flow [2024-06-27 19:21:40,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:21:40,217 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:21:40,217 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:21:40,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-27 19:21:40,217 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:21:40,218 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:21:40,218 INFO L85 PathProgramCache]: Analyzing trace with hash 1055585323, now seen corresponding path program 3 times [2024-06-27 19:21:40,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:21:40,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375945452] [2024-06-27 19:21:40,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:21:40,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:21:40,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:21:40,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:21:40,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:21:40,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375945452] [2024-06-27 19:21:40,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375945452] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:21:40,283 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:21:40,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:21:40,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138946172] [2024-06-27 19:21:40,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:21:40,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:21:40,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:21:40,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:21:40,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:21:40,314 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:21:40,314 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 371 transitions, 4861 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:21:40,314 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:21:40,314 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:21:40,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:21:40,933 INFO L124 PetriNetUnfolderBase]: 2580/4339 cut-off events. [2024-06-27 19:21:40,934 INFO L125 PetriNetUnfolderBase]: For 219936/219939 co-relation queries the response was YES. [2024-06-27 19:21:40,973 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27088 conditions, 4339 events. 2580/4339 cut-off events. For 219936/219939 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 27537 event pairs, 464 based on Foata normal form. 14/4345 useless extension candidates. Maximal degree in co-relation 26957. Up to 2475 conditions per place. [2024-06-27 19:21:40,987 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 312 selfloop transitions, 80 changer transitions 0/399 dead transitions. [2024-06-27 19:21:40,988 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 399 transitions, 6071 flow [2024-06-27 19:21:40,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:21:40,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:21:40,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-27 19:21:40,988 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6208333333333333 [2024-06-27 19:21:40,988 INFO L175 Difference]: Start difference. First operand has 280 places, 371 transitions, 4861 flow. Second operand 6 states and 149 transitions. [2024-06-27 19:21:40,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 399 transitions, 6071 flow [2024-06-27 19:21:41,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 399 transitions, 5917 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-27 19:21:41,760 INFO L231 Difference]: Finished difference. Result has 284 places, 374 transitions, 4954 flow [2024-06-27 19:21:41,761 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4707, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=371, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4954, PETRI_PLACES=284, PETRI_TRANSITIONS=374} [2024-06-27 19:21:41,761 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 243 predicate places. [2024-06-27 19:21:41,761 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 374 transitions, 4954 flow [2024-06-27 19:21:41,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:21:41,761 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:21:41,761 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:21:41,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-27 19:21:41,762 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:21:41,762 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:21:41,762 INFO L85 PathProgramCache]: Analyzing trace with hash 267633169, now seen corresponding path program 1 times [2024-06-27 19:21:41,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:21:41,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422362957] [2024-06-27 19:21:41,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:21:41,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:21:41,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:21:41,825 INFO 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 19:21:41,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:21:41,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422362957] [2024-06-27 19:21:41,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422362957] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:21:41,825 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:21:41,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:21:41,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430185963] [2024-06-27 19:21:41,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:21:41,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:21:41,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:21:41,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:21:41,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:21:41,892 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:21:41,892 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 374 transitions, 4954 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:21:41,892 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:21:41,892 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:21:41,892 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:21:42,731 INFO L124 PetriNetUnfolderBase]: 3048/5115 cut-off events. [2024-06-27 19:21:42,731 INFO L125 PetriNetUnfolderBase]: For 446761/446761 co-relation queries the response was YES. [2024-06-27 19:21:42,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36131 conditions, 5115 events. 3048/5115 cut-off events. For 446761/446761 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 33454 event pairs, 638 based on Foata normal form. 36/5144 useless extension candidates. Maximal degree in co-relation 35998. Up to 2985 conditions per place. [2024-06-27 19:21:42,782 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 227 selfloop transitions, 189 changer transitions 0/423 dead transitions. [2024-06-27 19:21:42,783 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 423 transitions, 6592 flow [2024-06-27 19:21:42,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:21:42,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:21:42,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 209 transitions. [2024-06-27 19:21:42,783 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.653125 [2024-06-27 19:21:42,783 INFO L175 Difference]: Start difference. First operand has 284 places, 374 transitions, 4954 flow. Second operand 8 states and 209 transitions. [2024-06-27 19:21:42,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 423 transitions, 6592 flow [2024-06-27 19:21:43,851 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 423 transitions, 6394 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-27 19:21:43,856 INFO L231 Difference]: Finished difference. Result has 289 places, 379 transitions, 5331 flow [2024-06-27 19:21:43,856 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4756, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=374, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=185, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5331, PETRI_PLACES=289, PETRI_TRANSITIONS=379} [2024-06-27 19:21:43,857 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 248 predicate places. [2024-06-27 19:21:43,857 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 379 transitions, 5331 flow [2024-06-27 19:21:43,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:21:43,857 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:21:43,857 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:21:43,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-27 19:21:43,857 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:21:43,858 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:21:43,858 INFO L85 PathProgramCache]: Analyzing trace with hash -901581847, now seen corresponding path program 2 times [2024-06-27 19:21:43,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:21:43,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630098668] [2024-06-27 19:21:43,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:21:43,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:21:43,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:21:43,924 INFO 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 19:21:43,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:21:43,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630098668] [2024-06-27 19:21:43,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630098668] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:21:43,925 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:21:43,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:21:43,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519096764] [2024-06-27 19:21:43,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:21:43,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:21:43,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:21:43,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:21:43,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:21:43,965 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:21:43,965 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 379 transitions, 5331 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:21:43,965 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:21:43,965 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:21:43,965 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:21:44,752 INFO L124 PetriNetUnfolderBase]: 3180/5347 cut-off events. [2024-06-27 19:21:44,752 INFO L125 PetriNetUnfolderBase]: For 481903/481903 co-relation queries the response was YES. [2024-06-27 19:21:44,797 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37322 conditions, 5347 events. 3180/5347 cut-off events. For 481903/481903 co-relation queries the response was YES. Maximal size of possible extension queue 338. Compared 35295 event pairs, 890 based on Foata normal form. 42/5382 useless extension candidates. Maximal degree in co-relation 37189. Up to 4175 conditions per place. [2024-06-27 19:21:44,814 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 211 selfloop transitions, 185 changer transitions 3/406 dead transitions. [2024-06-27 19:21:44,814 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 406 transitions, 6421 flow [2024-06-27 19:21:44,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:21:44,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:21:44,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-27 19:21:44,815 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6125 [2024-06-27 19:21:44,815 INFO L175 Difference]: Start difference. First operand has 289 places, 379 transitions, 5331 flow. Second operand 8 states and 196 transitions. [2024-06-27 19:21:44,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 406 transitions, 6421 flow [2024-06-27 19:21:45,965 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 406 transitions, 6106 flow, removed 41 selfloop flow, removed 3 redundant places. [2024-06-27 19:21:45,970 INFO L231 Difference]: Finished difference. Result has 294 places, 380 transitions, 5459 flow [2024-06-27 19:21:45,970 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5020, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=379, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=183, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5459, PETRI_PLACES=294, PETRI_TRANSITIONS=380} [2024-06-27 19:21:45,970 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 253 predicate places. [2024-06-27 19:21:45,971 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 380 transitions, 5459 flow [2024-06-27 19:21:45,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:21:45,971 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:21:45,971 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:21:45,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-27 19:21:45,971 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:21:45,971 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:21:45,971 INFO L85 PathProgramCache]: Analyzing trace with hash -1244977199, now seen corresponding path program 3 times [2024-06-27 19:21:45,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:21:45,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296696304] [2024-06-27 19:21:45,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:21:45,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:21:45,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:21:46,036 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:21:46,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:21:46,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296696304] [2024-06-27 19:21:46,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296696304] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:21:46,037 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:21:46,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:21:46,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977181828] [2024-06-27 19:21:46,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:21:46,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:21:46,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:21:46,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:21:46,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:21:46,098 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:21:46,098 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 380 transitions, 5459 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:21:46,098 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:21:46,098 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:21:46,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:21:47,059 INFO L124 PetriNetUnfolderBase]: 3412/5741 cut-off events. [2024-06-27 19:21:47,060 INFO L125 PetriNetUnfolderBase]: For 530710/530710 co-relation queries the response was YES. [2024-06-27 19:21:47,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41114 conditions, 5741 events. 3412/5741 cut-off events. For 530710/530710 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 38499 event pairs, 899 based on Foata normal form. 36/5770 useless extension candidates. Maximal degree in co-relation 40979. Up to 4177 conditions per place. [2024-06-27 19:21:47,129 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 226 selfloop transitions, 183 changer transitions 0/416 dead transitions. [2024-06-27 19:21:47,129 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 416 transitions, 6819 flow [2024-06-27 19:21:47,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:21:47,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:21:47,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 201 transitions. [2024-06-27 19:21:47,130 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.628125 [2024-06-27 19:21:47,130 INFO L175 Difference]: Start difference. First operand has 294 places, 380 transitions, 5459 flow. Second operand 8 states and 201 transitions. [2024-06-27 19:21:47,131 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 416 transitions, 6819 flow [2024-06-27 19:21:48,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 416 transitions, 6399 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-27 19:21:48,183 INFO L231 Difference]: Finished difference. Result has 297 places, 384 transitions, 5573 flow [2024-06-27 19:21:48,184 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5039, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=380, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=180, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5573, PETRI_PLACES=297, PETRI_TRANSITIONS=384} [2024-06-27 19:21:48,184 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 256 predicate places. [2024-06-27 19:21:48,184 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 384 transitions, 5573 flow [2024-06-27 19:21:48,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:21:48,184 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:21:48,184 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:21:48,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-27 19:21:48,185 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:21:48,185 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:21:48,185 INFO L85 PathProgramCache]: Analyzing trace with hash -1960407975, now seen corresponding path program 4 times [2024-06-27 19:21:48,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:21:48,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187573373] [2024-06-27 19:21:48,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:21:48,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:21:48,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:21:48,261 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:21:48,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:21:48,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187573373] [2024-06-27 19:21:48,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187573373] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:21:48,262 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:21:48,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:21:48,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779117927] [2024-06-27 19:21:48,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:21:48,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:21:48,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:21:48,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:21:48,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:21:48,329 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:21:48,330 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 384 transitions, 5573 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:21:48,330 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:21:48,330 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:21:48,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:21:49,247 INFO L124 PetriNetUnfolderBase]: 3544/5972 cut-off events. [2024-06-27 19:21:49,247 INFO L125 PetriNetUnfolderBase]: For 565503/565503 co-relation queries the response was YES. [2024-06-27 19:21:49,297 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42385 conditions, 5972 events. 3544/5972 cut-off events. For 565503/565503 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 40510 event pairs, 992 based on Foata normal form. 42/6009 useless extension candidates. Maximal degree in co-relation 42248. Up to 5072 conditions per place. [2024-06-27 19:21:49,315 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 291 selfloop transitions, 108 changer transitions 3/409 dead transitions. [2024-06-27 19:21:49,316 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 409 transitions, 6525 flow [2024-06-27 19:21:49,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:21:49,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:21:49,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 230 transitions. [2024-06-27 19:21:49,317 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.575 [2024-06-27 19:21:49,317 INFO L175 Difference]: Start difference. First operand has 297 places, 384 transitions, 5573 flow. Second operand 10 states and 230 transitions. [2024-06-27 19:21:49,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 409 transitions, 6525 flow [2024-06-27 19:21:50,692 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 409 transitions, 6211 flow, removed 37 selfloop flow, removed 4 redundant places. [2024-06-27 19:21:50,698 INFO L231 Difference]: Finished difference. Result has 303 places, 385 transitions, 5546 flow [2024-06-27 19:21:50,698 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5259, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=384, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5546, PETRI_PLACES=303, PETRI_TRANSITIONS=385} [2024-06-27 19:21:50,698 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 262 predicate places. [2024-06-27 19:21:50,698 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 385 transitions, 5546 flow [2024-06-27 19:21:50,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:21:50,698 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:21:50,698 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:21:50,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-27 19:21:50,699 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:21:50,699 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:21:50,699 INFO L85 PathProgramCache]: Analyzing trace with hash -1965770355, now seen corresponding path program 5 times [2024-06-27 19:21:50,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:21:50,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96723050] [2024-06-27 19:21:50,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:21:50,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:21:50,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:21:50,773 INFO 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 19:21:50,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:21:50,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96723050] [2024-06-27 19:21:50,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96723050] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:21:50,773 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:21:50,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:21:50,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729957501] [2024-06-27 19:21:50,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:21:50,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:21:50,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:21:50,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:21:50,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:21:50,838 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:21:50,839 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 385 transitions, 5546 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:21:50,839 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:21:50,839 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:21:50,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:21:51,802 INFO L124 PetriNetUnfolderBase]: 3666/6198 cut-off events. [2024-06-27 19:21:51,802 INFO L125 PetriNetUnfolderBase]: For 578313/578313 co-relation queries the response was YES. [2024-06-27 19:21:51,856 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43351 conditions, 6198 events. 3666/6198 cut-off events. For 578313/578313 co-relation queries the response was YES. Maximal size of possible extension queue 381. Compared 42480 event pairs, 1060 based on Foata normal form. 42/6235 useless extension candidates. Maximal degree in co-relation 43212. Up to 5274 conditions per place. [2024-06-27 19:21:51,875 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 297 selfloop transitions, 101 changer transitions 3/408 dead transitions. [2024-06-27 19:21:51,875 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 408 transitions, 6496 flow [2024-06-27 19:21:51,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:21:51,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:21:51,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 190 transitions. [2024-06-27 19:21:51,876 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.59375 [2024-06-27 19:21:51,876 INFO L175 Difference]: Start difference. First operand has 303 places, 385 transitions, 5546 flow. Second operand 8 states and 190 transitions. [2024-06-27 19:21:51,876 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 408 transitions, 6496 flow [2024-06-27 19:21:53,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 408 transitions, 6222 flow, removed 31 selfloop flow, removed 8 redundant places. [2024-06-27 19:21:53,438 INFO L231 Difference]: Finished difference. Result has 303 places, 386 transitions, 5550 flow [2024-06-27 19:21:53,438 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5272, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=385, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5550, PETRI_PLACES=303, PETRI_TRANSITIONS=386} [2024-06-27 19:21:53,439 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 262 predicate places. [2024-06-27 19:21:53,439 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 386 transitions, 5550 flow [2024-06-27 19:21:53,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:21:53,439 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:21:53,439 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:21:53,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-27 19:21:53,439 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:21:53,440 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:21:53,440 INFO L85 PathProgramCache]: Analyzing trace with hash -1965918225, now seen corresponding path program 6 times [2024-06-27 19:21:53,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:21:53,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132560148] [2024-06-27 19:21:53,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:21:53,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:21:53,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:21:53,511 INFO 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 19:21:53,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:21:53,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132560148] [2024-06-27 19:21:53,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132560148] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:21:53,511 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:21:53,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:21:53,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220409118] [2024-06-27 19:21:53,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:21:53,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:21:53,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:21:53,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:21:53,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:21:53,567 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:21:53,567 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 386 transitions, 5550 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:21:53,567 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:21:53,567 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:21:53,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:21:54,621 INFO L124 PetriNetUnfolderBase]: 3898/6592 cut-off events. [2024-06-27 19:21:54,621 INFO L125 PetriNetUnfolderBase]: For 636808/636808 co-relation queries the response was YES. [2024-06-27 19:21:54,686 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47226 conditions, 6592 events. 3898/6592 cut-off events. For 636808/636808 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 45752 event pairs, 1069 based on Foata normal form. 36/6623 useless extension candidates. Maximal degree in co-relation 47086. Up to 5072 conditions per place. [2024-06-27 19:21:54,709 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 311 selfloop transitions, 100 changer transitions 0/418 dead transitions. [2024-06-27 19:21:54,710 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 418 transitions, 6786 flow [2024-06-27 19:21:54,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:21:54,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:21:54,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 195 transitions. [2024-06-27 19:21:54,711 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.609375 [2024-06-27 19:21:54,711 INFO L175 Difference]: Start difference. First operand has 303 places, 386 transitions, 5550 flow. Second operand 8 states and 195 transitions. [2024-06-27 19:21:54,711 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 418 transitions, 6786 flow [2024-06-27 19:21:56,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 418 transitions, 6522 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-27 19:21:56,491 INFO L231 Difference]: Finished difference. Result has 306 places, 390 transitions, 5678 flow [2024-06-27 19:21:56,491 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5286, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=386, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=287, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5678, PETRI_PLACES=306, PETRI_TRANSITIONS=390} [2024-06-27 19:21:56,492 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 265 predicate places. [2024-06-27 19:21:56,492 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 390 transitions, 5678 flow [2024-06-27 19:21:56,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:21:56,492 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:21:56,492 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:21:56,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-27 19:21:56,492 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:21:56,493 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:21:56,493 INFO L85 PathProgramCache]: Analyzing trace with hash -1960192773, now seen corresponding path program 1 times [2024-06-27 19:21:56,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:21:56,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282105620] [2024-06-27 19:21:56,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:21:56,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:21:56,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:21:56,557 INFO 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 19:21:56,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:21:56,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282105620] [2024-06-27 19:21:56,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282105620] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:21:56,557 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:21:56,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:21:56,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565177537] [2024-06-27 19:21:56,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:21:56,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:21:56,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:21:56,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:21:56,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:21:56,598 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:21:56,599 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 390 transitions, 5678 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:21:56,599 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:21:56,599 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:21:56,599 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:21:57,694 INFO L124 PetriNetUnfolderBase]: 4006/6794 cut-off events. [2024-06-27 19:21:57,694 INFO L125 PetriNetUnfolderBase]: For 656547/656547 co-relation queries the response was YES. [2024-06-27 19:21:57,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48230 conditions, 6794 events. 4006/6794 cut-off events. For 656547/656547 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 47606 event pairs, 1142 based on Foata normal form. 36/6825 useless extension candidates. Maximal degree in co-relation 48088. Up to 5444 conditions per place. [2024-06-27 19:21:57,776 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 295 selfloop transitions, 113 changer transitions 6/421 dead transitions. [2024-06-27 19:21:57,777 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 421 transitions, 6692 flow [2024-06-27 19:21:57,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:21:57,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:21:57,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 233 transitions. [2024-06-27 19:21:57,778 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5825 [2024-06-27 19:21:57,778 INFO L175 Difference]: Start difference. First operand has 306 places, 390 transitions, 5678 flow. Second operand 10 states and 233 transitions. [2024-06-27 19:21:57,778 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 421 transitions, 6692 flow [2024-06-27 19:21:59,675 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 421 transitions, 6477 flow, removed 45 selfloop flow, removed 4 redundant places. [2024-06-27 19:21:59,681 INFO L231 Difference]: Finished difference. Result has 312 places, 391 transitions, 5759 flow [2024-06-27 19:21:59,681 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5463, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=390, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5759, PETRI_PLACES=312, PETRI_TRANSITIONS=391} [2024-06-27 19:21:59,681 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 271 predicate places. [2024-06-27 19:21:59,681 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 391 transitions, 5759 flow [2024-06-27 19:21:59,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:21:59,682 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:21:59,682 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:21:59,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-27 19:21:59,682 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:21:59,682 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:21:59,682 INFO L85 PathProgramCache]: Analyzing trace with hash 524512861, now seen corresponding path program 7 times [2024-06-27 19:21:59,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:21:59,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990918788] [2024-06-27 19:21:59,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:21:59,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:21:59,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:21:59,753 INFO 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 19:21:59,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:21:59,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990918788] [2024-06-27 19:21:59,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990918788] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:21:59,754 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:21:59,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:21:59,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186836339] [2024-06-27 19:21:59,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:21:59,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:21:59,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:21:59,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:21:59,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:21:59,789 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:21:59,790 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 391 transitions, 5759 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:21:59,790 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:21:59,790 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:21:59,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:22:00,906 INFO L124 PetriNetUnfolderBase]: 4108/6973 cut-off events. [2024-06-27 19:22:00,907 INFO L125 PetriNetUnfolderBase]: For 692252/692255 co-relation queries the response was YES. [2024-06-27 19:22:00,967 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49176 conditions, 6973 events. 4108/6973 cut-off events. For 692252/692255 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 49233 event pairs, 1267 based on Foata normal form. 44/7009 useless extension candidates. Maximal degree in co-relation 49032. Up to 5786 conditions per place. [2024-06-27 19:22:00,986 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 246 selfloop transitions, 160 changer transitions 3/416 dead transitions. [2024-06-27 19:22:00,987 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 416 transitions, 6893 flow [2024-06-27 19:22:00,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:22:00,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:22:00,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 210 transitions. [2024-06-27 19:22:00,988 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-06-27 19:22:00,988 INFO L175 Difference]: Start difference. First operand has 312 places, 391 transitions, 5759 flow. Second operand 9 states and 210 transitions. [2024-06-27 19:22:00,988 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 416 transitions, 6893 flow [2024-06-27 19:22:02,916 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 416 transitions, 6596 flow, removed 37 selfloop flow, removed 8 redundant places. [2024-06-27 19:22:02,921 INFO L231 Difference]: Finished difference. Result has 313 places, 392 transitions, 5872 flow [2024-06-27 19:22:02,921 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5462, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=391, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=158, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5872, PETRI_PLACES=313, PETRI_TRANSITIONS=392} [2024-06-27 19:22:02,921 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 272 predicate places. [2024-06-27 19:22:02,921 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 392 transitions, 5872 flow [2024-06-27 19:22:02,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:22:02,922 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:22:02,922 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:22:02,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-27 19:22:02,922 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:22:02,922 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:22:02,922 INFO L85 PathProgramCache]: Analyzing trace with hash 325211071, now seen corresponding path program 8 times [2024-06-27 19:22:02,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:22:02,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004121609] [2024-06-27 19:22:02,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:22:02,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:22:02,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:22:02,992 INFO 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 19:22:02,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:22:02,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004121609] [2024-06-27 19:22:02,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004121609] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:22:02,993 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:22:02,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:22:02,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828310849] [2024-06-27 19:22:02,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:22:02,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:22:02,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:22:02,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:22:02,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:22:03,036 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:22:03,037 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 392 transitions, 5872 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:22:03,037 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:22:03,037 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:22:03,037 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:22:04,225 INFO L124 PetriNetUnfolderBase]: 4230/7164 cut-off events. [2024-06-27 19:22:04,225 INFO L125 PetriNetUnfolderBase]: For 713135/713135 co-relation queries the response was YES. [2024-06-27 19:22:04,294 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50426 conditions, 7164 events. 4230/7164 cut-off events. For 713135/713135 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 50680 event pairs, 1288 based on Foata normal form. 42/7201 useless extension candidates. Maximal degree in co-relation 50281. Up to 5804 conditions per place. [2024-06-27 19:22:04,316 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 244 selfloop transitions, 168 changer transitions 3/422 dead transitions. [2024-06-27 19:22:04,316 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 422 transitions, 7038 flow [2024-06-27 19:22:04,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:22:04,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:22:04,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-27 19:22:04,317 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.615625 [2024-06-27 19:22:04,317 INFO L175 Difference]: Start difference. First operand has 313 places, 392 transitions, 5872 flow. Second operand 8 states and 197 transitions. [2024-06-27 19:22:04,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 422 transitions, 7038 flow [2024-06-27 19:22:06,299 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 422 transitions, 6646 flow, removed 38 selfloop flow, removed 7 redundant places. [2024-06-27 19:22:06,304 INFO L231 Difference]: Finished difference. Result has 314 places, 393 transitions, 5911 flow [2024-06-27 19:22:06,305 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5480, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=392, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=166, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5911, PETRI_PLACES=314, PETRI_TRANSITIONS=393} [2024-06-27 19:22:06,305 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 273 predicate places. [2024-06-27 19:22:06,305 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 393 transitions, 5911 flow [2024-06-27 19:22:06,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:22:06,305 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:22:06,306 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:22:06,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-27 19:22:06,306 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:22:06,306 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:22:06,306 INFO L85 PathProgramCache]: Analyzing trace with hash 330573451, now seen corresponding path program 9 times [2024-06-27 19:22:06,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:22:06,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164672725] [2024-06-27 19:22:06,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:22:06,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:22:06,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:22:06,377 INFO 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 19:22:06,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:22:06,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164672725] [2024-06-27 19:22:06,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164672725] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:22:06,378 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:22:06,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:22:06,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235986042] [2024-06-27 19:22:06,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:22:06,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:22:06,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:22:06,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:22:06,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:22:06,428 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:22:06,428 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 393 transitions, 5911 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:22:06,428 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:22:06,428 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:22:06,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:22:07,609 INFO L124 PetriNetUnfolderBase]: 4339/7371 cut-off events. [2024-06-27 19:22:07,609 INFO L125 PetriNetUnfolderBase]: For 721747/721747 co-relation queries the response was YES. [2024-06-27 19:22:07,680 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51215 conditions, 7371 events. 4339/7371 cut-off events. For 721747/721747 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 52629 event pairs, 1357 based on Foata normal form. 42/7408 useless extension candidates. Maximal degree in co-relation 51069. Up to 5987 conditions per place. [2024-06-27 19:22:07,701 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 236 selfloop transitions, 179 changer transitions 3/425 dead transitions. [2024-06-27 19:22:07,701 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 425 transitions, 7093 flow [2024-06-27 19:22:07,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:22:07,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:22:07,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 236 transitions. [2024-06-27 19:22:07,702 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.59 [2024-06-27 19:22:07,702 INFO L175 Difference]: Start difference. First operand has 314 places, 393 transitions, 5911 flow. Second operand 10 states and 236 transitions. [2024-06-27 19:22:07,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 425 transitions, 7093 flow [2024-06-27 19:22:09,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 425 transitions, 6691 flow, removed 37 selfloop flow, removed 6 redundant places. [2024-06-27 19:22:09,994 INFO L231 Difference]: Finished difference. Result has 318 places, 394 transitions, 5966 flow [2024-06-27 19:22:09,994 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5509, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=393, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=177, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5966, PETRI_PLACES=318, PETRI_TRANSITIONS=394} [2024-06-27 19:22:09,994 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 277 predicate places. [2024-06-27 19:22:09,994 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 394 transitions, 5966 flow [2024-06-27 19:22:09,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:22:09,995 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:22:09,995 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:22:09,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-27 19:22:09,995 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:22:09,995 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:22:09,995 INFO L85 PathProgramCache]: Analyzing trace with hash -1967767855, now seen corresponding path program 10 times [2024-06-27 19:22:09,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:22:09,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448743245] [2024-06-27 19:22:09,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:22:09,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:22:09,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:22:10,064 INFO 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 19:22:10,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:22:10,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448743245] [2024-06-27 19:22:10,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448743245] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:22:10,064 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:22:10,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:22:10,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537583692] [2024-06-27 19:22:10,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:22:10,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:22:10,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:22:10,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:22:10,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:22:10,109 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:22:10,110 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 394 transitions, 5966 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:22:10,110 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:22:10,110 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:22:10,110 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:22:11,320 INFO L124 PetriNetUnfolderBase]: 4433/7563 cut-off events. [2024-06-27 19:22:11,320 INFO L125 PetriNetUnfolderBase]: For 699638/699638 co-relation queries the response was YES. [2024-06-27 19:22:11,389 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51358 conditions, 7563 events. 4433/7563 cut-off events. For 699638/699638 co-relation queries the response was YES. Maximal size of possible extension queue 494. Compared 54472 event pairs, 1095 based on Foata normal form. 36/7594 useless extension candidates. Maximal degree in co-relation 51211. Up to 4369 conditions per place. [2024-06-27 19:22:11,411 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 253 selfloop transitions, 175 changer transitions 0/435 dead transitions. [2024-06-27 19:22:11,411 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 435 transitions, 7406 flow [2024-06-27 19:22:11,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:22:11,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:22:11,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 206 transitions. [2024-06-27 19:22:11,412 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.64375 [2024-06-27 19:22:11,412 INFO L175 Difference]: Start difference. First operand has 318 places, 394 transitions, 5966 flow. Second operand 8 states and 206 transitions. [2024-06-27 19:22:11,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 435 transitions, 7406 flow [2024-06-27 19:22:13,454 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 435 transitions, 6978 flow, removed 39 selfloop flow, removed 8 redundant places. [2024-06-27 19:22:13,460 INFO L231 Difference]: Finished difference. Result has 319 places, 397 transitions, 6093 flow [2024-06-27 19:22:13,460 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5538, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=394, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=172, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6093, PETRI_PLACES=319, PETRI_TRANSITIONS=397} [2024-06-27 19:22:13,460 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 278 predicate places. [2024-06-27 19:22:13,460 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 397 transitions, 6093 flow [2024-06-27 19:22:13,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:22:13,461 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:22:13,461 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:22:13,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-27 19:22:13,461 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:22:13,461 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:22:13,461 INFO L85 PathProgramCache]: Analyzing trace with hash 330788653, now seen corresponding path program 2 times [2024-06-27 19:22:13,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:22:13,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152918624] [2024-06-27 19:22:13,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:22:13,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:22:13,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:22:13,531 INFO 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 19:22:13,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:22:13,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152918624] [2024-06-27 19:22:13,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152918624] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:22:13,532 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:22:13,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:22:13,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286845295] [2024-06-27 19:22:13,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:22:13,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:22:13,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:22:13,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:22:13,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:22:13,583 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:22:13,584 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 397 transitions, 6093 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:22:13,584 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:22:13,584 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:22:13,584 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:22:14,956 INFO L124 PetriNetUnfolderBase]: 4541/7765 cut-off events. [2024-06-27 19:22:14,956 INFO L125 PetriNetUnfolderBase]: For 717728/717728 co-relation queries the response was YES. [2024-06-27 19:22:15,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52616 conditions, 7765 events. 4541/7765 cut-off events. For 717728/717728 co-relation queries the response was YES. Maximal size of possible extension queue 513. Compared 56181 event pairs, 1359 based on Foata normal form. 36/7796 useless extension candidates. Maximal degree in co-relation 52467. Up to 5585 conditions per place. [2024-06-27 19:22:15,045 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 230 selfloop transitions, 192 changer transitions 6/435 dead transitions. [2024-06-27 19:22:15,045 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 435 transitions, 7327 flow [2024-06-27 19:22:15,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:22:15,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:22:15,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 240 transitions. [2024-06-27 19:22:15,046 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-27 19:22:15,046 INFO L175 Difference]: Start difference. First operand has 319 places, 397 transitions, 6093 flow. Second operand 10 states and 240 transitions. [2024-06-27 19:22:15,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 435 transitions, 7327 flow [2024-06-27 19:22:17,260 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 435 transitions, 6761 flow, removed 57 selfloop flow, removed 7 redundant places. [2024-06-27 19:22:17,265 INFO L231 Difference]: Finished difference. Result has 322 places, 398 transitions, 6002 flow [2024-06-27 19:22:17,265 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5531, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=397, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=190, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6002, PETRI_PLACES=322, PETRI_TRANSITIONS=398} [2024-06-27 19:22:17,266 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 281 predicate places. [2024-06-27 19:22:17,266 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 398 transitions, 6002 flow [2024-06-27 19:22:17,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:22:17,266 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:22:17,266 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:22:17,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-27 19:22:17,266 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:22:17,267 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:22:17,267 INFO L85 PathProgramCache]: Analyzing trace with hash 1064426461, now seen corresponding path program 3 times [2024-06-27 19:22:17,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:22:17,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669834591] [2024-06-27 19:22:17,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:22:17,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:22:17,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:22:17,337 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 19:22:17,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:22:17,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669834591] [2024-06-27 19:22:17,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669834591] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:22:17,338 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:22:17,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:22:17,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685876742] [2024-06-27 19:22:17,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:22:17,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:22:17,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:22:17,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:22:17,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:22:17,383 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:22:17,384 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 398 transitions, 6002 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:22:17,384 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:22:17,384 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:22:17,384 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:22:18,635 INFO L124 PetriNetUnfolderBase]: 4619/7932 cut-off events. [2024-06-27 19:22:18,636 INFO L125 PetriNetUnfolderBase]: For 712822/712825 co-relation queries the response was YES. [2024-06-27 19:22:18,712 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52199 conditions, 7932 events. 4619/7932 cut-off events. For 712822/712825 co-relation queries the response was YES. Maximal size of possible extension queue 526. Compared 58129 event pairs, 1486 based on Foata normal form. 38/7962 useless extension candidates. Maximal degree in co-relation 52050. Up to 6449 conditions per place. [2024-06-27 19:22:18,735 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 256 selfloop transitions, 158 changer transitions 9/430 dead transitions. [2024-06-27 19:22:18,735 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 430 transitions, 7212 flow [2024-06-27 19:22:18,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:22:18,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:22:18,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 233 transitions. [2024-06-27 19:22:18,736 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5825 [2024-06-27 19:22:18,737 INFO L175 Difference]: Start difference. First operand has 322 places, 398 transitions, 6002 flow. Second operand 10 states and 233 transitions. [2024-06-27 19:22:18,737 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 430 transitions, 7212 flow [2024-06-27 19:22:21,188 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 430 transitions, 6742 flow, removed 46 selfloop flow, removed 8 redundant places. [2024-06-27 19:22:21,194 INFO L231 Difference]: Finished difference. Result has 324 places, 396 transitions, 5911 flow [2024-06-27 19:22:21,194 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5538, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=398, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=156, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5911, PETRI_PLACES=324, PETRI_TRANSITIONS=396} [2024-06-27 19:22:21,194 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 283 predicate places. [2024-06-27 19:22:21,194 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 396 transitions, 5911 flow [2024-06-27 19:22:21,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:22:21,194 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:22:21,195 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:22:21,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-27 19:22:21,195 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:22:21,195 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:22:21,195 INFO L85 PathProgramCache]: Analyzing trace with hash 1073623231, now seen corresponding path program 4 times [2024-06-27 19:22:21,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:22:21,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208272059] [2024-06-27 19:22:21,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:22:21,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:22:21,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:22:21,263 INFO 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 19:22:21,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:22:21,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208272059] [2024-06-27 19:22:21,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208272059] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:22:21,263 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:22:21,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:22:21,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400212466] [2024-06-27 19:22:21,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:22:21,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:22:21,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:22:21,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:22:21,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:22:21,327 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:22:21,327 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 396 transitions, 5911 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:22:21,327 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:22:21,327 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:22:21,327 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:22:22,602 INFO L124 PetriNetUnfolderBase]: 4643/7962 cut-off events. [2024-06-27 19:22:22,602 INFO L125 PetriNetUnfolderBase]: For 773901/773904 co-relation queries the response was YES. [2024-06-27 19:22:22,680 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53270 conditions, 7962 events. 4643/7962 cut-off events. For 773901/773904 co-relation queries the response was YES. Maximal size of possible extension queue 521. Compared 57924 event pairs, 1469 based on Foata normal form. 38/7992 useless extension candidates. Maximal degree in co-relation 53120. Up to 4741 conditions per place. [2024-06-27 19:22:22,703 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 246 selfloop transitions, 166 changer transitions 12/431 dead transitions. [2024-06-27 19:22:22,704 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 431 transitions, 7255 flow [2024-06-27 19:22:22,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:22:22,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:22:22,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 218 transitions. [2024-06-27 19:22:22,705 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6055555555555555 [2024-06-27 19:22:22,705 INFO L175 Difference]: Start difference. First operand has 324 places, 396 transitions, 5911 flow. Second operand 9 states and 218 transitions. [2024-06-27 19:22:22,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 431 transitions, 7255 flow [2024-06-27 19:22:25,453 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 431 transitions, 6854 flow, removed 44 selfloop flow, removed 8 redundant places. [2024-06-27 19:22:25,458 INFO L231 Difference]: Finished difference. Result has 325 places, 391 transitions, 5839 flow [2024-06-27 19:22:25,458 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5510, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=396, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=165, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5839, PETRI_PLACES=325, PETRI_TRANSITIONS=391} [2024-06-27 19:22:25,458 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 284 predicate places. [2024-06-27 19:22:25,458 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 391 transitions, 5839 flow [2024-06-27 19:22:25,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:22:25,458 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:22:25,459 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:22:25,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-27 19:22:25,459 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:22:25,459 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:22:25,459 INFO L85 PathProgramCache]: Analyzing trace with hash -666984972, now seen corresponding path program 1 times [2024-06-27 19:22:25,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:22:25,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764071602] [2024-06-27 19:22:25,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:22:25,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:22:25,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:22:25,524 INFO 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 19:22:25,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:22:25,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764071602] [2024-06-27 19:22:25,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764071602] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:22:25,525 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:22:25,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:22:25,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108766508] [2024-06-27 19:22:25,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:22:25,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:22:25,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:22:25,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:22:25,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:22:25,570 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:22:25,570 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 391 transitions, 5839 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:22:25,570 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:22:25,570 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:22:25,570 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:22:27,001 INFO L124 PetriNetUnfolderBase]: 4511/7646 cut-off events. [2024-06-27 19:22:27,001 INFO L125 PetriNetUnfolderBase]: For 727488/727488 co-relation queries the response was YES. [2024-06-27 19:22:27,074 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53665 conditions, 7646 events. 4511/7646 cut-off events. For 727488/727488 co-relation queries the response was YES. Maximal size of possible extension queue 503. Compared 55260 event pairs, 1335 based on Foata normal form. 10/7581 useless extension candidates. Maximal degree in co-relation 53514. Up to 6017 conditions per place. [2024-06-27 19:22:27,097 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 238 selfloop transitions, 189 changer transitions 4/438 dead transitions. [2024-06-27 19:22:27,097 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 438 transitions, 7414 flow [2024-06-27 19:22:27,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:22:27,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:22:27,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 208 transitions. [2024-06-27 19:22:27,098 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.65 [2024-06-27 19:22:27,098 INFO L175 Difference]: Start difference. First operand has 325 places, 391 transitions, 5839 flow. Second operand 8 states and 208 transitions. [2024-06-27 19:22:27,098 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 438 transitions, 7414 flow [2024-06-27 19:22:29,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 438 transitions, 6905 flow, removed 46 selfloop flow, removed 8 redundant places. [2024-06-27 19:22:29,344 INFO L231 Difference]: Finished difference. Result has 326 places, 398 transitions, 5986 flow [2024-06-27 19:22:29,344 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5330, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=391, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=181, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5986, PETRI_PLACES=326, PETRI_TRANSITIONS=398} [2024-06-27 19:22:29,344 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 285 predicate places. [2024-06-27 19:22:29,345 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 398 transitions, 5986 flow [2024-06-27 19:22:29,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:22:29,345 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:22:29,345 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:22:29,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-27 19:22:29,345 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:22:29,345 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:22:29,345 INFO L85 PathProgramCache]: Analyzing trace with hash -274175850, now seen corresponding path program 2 times [2024-06-27 19:22:29,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:22:29,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408457899] [2024-06-27 19:22:29,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:22:29,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:22:29,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:22:29,413 INFO 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 19:22:29,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:22:29,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408457899] [2024-06-27 19:22:29,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408457899] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:22:29,414 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:22:29,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:22:29,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017749444] [2024-06-27 19:22:29,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:22:29,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:22:29,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:22:29,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:22:29,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:22:29,453 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:22:29,454 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 398 transitions, 5986 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:22:29,454 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:22:29,454 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:22:29,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:22:30,612 INFO L124 PetriNetUnfolderBase]: 4289/7315 cut-off events. [2024-06-27 19:22:30,612 INFO L125 PetriNetUnfolderBase]: For 615458/615458 co-relation queries the response was YES. [2024-06-27 19:22:30,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49009 conditions, 7315 events. 4289/7315 cut-off events. For 615458/615458 co-relation queries the response was YES. Maximal size of possible extension queue 478. Compared 52449 event pairs, 1348 based on Foata normal form. 10/7299 useless extension candidates. Maximal degree in co-relation 48857. Up to 6225 conditions per place. [2024-06-27 19:22:30,703 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 235 selfloop transitions, 181 changer transitions 4/427 dead transitions. [2024-06-27 19:22:30,703 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 427 transitions, 7076 flow [2024-06-27 19:22:30,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:22:30,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:22:30,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-06-27 19:22:30,704 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.621875 [2024-06-27 19:22:30,704 INFO L175 Difference]: Start difference. First operand has 326 places, 398 transitions, 5986 flow. Second operand 8 states and 199 transitions. [2024-06-27 19:22:30,704 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 427 transitions, 7076 flow [2024-06-27 19:22:33,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 427 transitions, 6651 flow, removed 34 selfloop flow, removed 5 redundant places. [2024-06-27 19:22:33,215 INFO L231 Difference]: Finished difference. Result has 329 places, 397 transitions, 5922 flow [2024-06-27 19:22:33,215 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5567, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=398, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=181, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5922, PETRI_PLACES=329, PETRI_TRANSITIONS=397} [2024-06-27 19:22:33,216 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 288 predicate places. [2024-06-27 19:22:33,216 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 397 transitions, 5922 flow [2024-06-27 19:22:33,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:22:33,216 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:22:33,216 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:22:33,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-27 19:22:33,216 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:22:33,216 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:22:33,217 INFO L85 PathProgramCache]: Analyzing trace with hash -158884680, now seen corresponding path program 3 times [2024-06-27 19:22:33,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:22:33,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483435343] [2024-06-27 19:22:33,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:22:33,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:22:33,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:22:33,294 INFO 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 19:22:33,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:22:33,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483435343] [2024-06-27 19:22:33,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483435343] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:22:33,295 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:22:33,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:22:33,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838644747] [2024-06-27 19:22:33,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:22:33,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:22:33,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:22:33,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:22:33,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:22:33,341 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:22:33,341 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 397 transitions, 5922 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:22:33,341 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:22:33,341 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:22:33,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:22:34,511 INFO L124 PetriNetUnfolderBase]: 4214/7186 cut-off events. [2024-06-27 19:22:34,511 INFO L125 PetriNetUnfolderBase]: For 553634/553637 co-relation queries the response was YES. [2024-06-27 19:22:34,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46940 conditions, 7186 events. 4214/7186 cut-off events. For 553634/553637 co-relation queries the response was YES. Maximal size of possible extension queue 466. Compared 51317 event pairs, 1286 based on Foata normal form. 12/7181 useless extension candidates. Maximal degree in co-relation 46787. Up to 6438 conditions per place. [2024-06-27 19:22:34,607 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 329 selfloop transitions, 82 changer transitions 4/422 dead transitions. [2024-06-27 19:22:34,607 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 422 transitions, 6826 flow [2024-06-27 19:22:34,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:22:34,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:22:34,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-27 19:22:34,608 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.596875 [2024-06-27 19:22:34,608 INFO L175 Difference]: Start difference. First operand has 329 places, 397 transitions, 5922 flow. Second operand 8 states and 191 transitions. [2024-06-27 19:22:34,608 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 422 transitions, 6826 flow [2024-06-27 19:22:37,370 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 422 transitions, 6419 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-27 19:22:37,375 INFO L231 Difference]: Finished difference. Result has 331 places, 396 transitions, 5667 flow [2024-06-27 19:22:37,375 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5515, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=397, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=315, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5667, PETRI_PLACES=331, PETRI_TRANSITIONS=396} [2024-06-27 19:22:37,376 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 290 predicate places. [2024-06-27 19:22:37,376 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 396 transitions, 5667 flow [2024-06-27 19:22:37,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:22:37,376 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:22:37,376 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:22:37,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-27 19:22:37,376 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:22:37,377 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:22:37,377 INFO L85 PathProgramCache]: Analyzing trace with hash -283436883, now seen corresponding path program 1 times [2024-06-27 19:22:37,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:22:37,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371814883] [2024-06-27 19:22:37,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:22:37,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:22:37,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:22:37,429 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 19:22:37,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:22:37,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371814883] [2024-06-27 19:22:37,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371814883] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:22:37,430 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:22:37,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:22:37,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753056146] [2024-06-27 19:22:37,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:22:37,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:22:37,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:22:37,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:22:37,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:22:37,459 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:22:37,459 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 396 transitions, 5667 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:22:37,459 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:22:37,459 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:22:37,459 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:22:38,635 INFO L124 PetriNetUnfolderBase]: 4205/7196 cut-off events. [2024-06-27 19:22:38,635 INFO L125 PetriNetUnfolderBase]: For 542570/542573 co-relation queries the response was YES. [2024-06-27 19:22:38,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46689 conditions, 7196 events. 4205/7196 cut-off events. For 542570/542573 co-relation queries the response was YES. Maximal size of possible extension queue 460. Compared 51556 event pairs, 1342 based on Foata normal form. 3/7191 useless extension candidates. Maximal degree in co-relation 46535. Up to 6116 conditions per place. [2024-06-27 19:22:38,717 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 259 selfloop transitions, 158 changer transitions 0/424 dead transitions. [2024-06-27 19:22:38,718 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 424 transitions, 6960 flow [2024-06-27 19:22:38,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:22:38,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:22:38,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2024-06-27 19:22:38,718 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5928571428571429 [2024-06-27 19:22:38,719 INFO L175 Difference]: Start difference. First operand has 331 places, 396 transitions, 5667 flow. Second operand 7 states and 166 transitions. [2024-06-27 19:22:38,719 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 424 transitions, 6960 flow [2024-06-27 19:22:41,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 424 transitions, 6747 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-27 19:22:41,322 INFO L231 Difference]: Finished difference. Result has 332 places, 405 transitions, 5862 flow [2024-06-27 19:22:41,322 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5454, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=396, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=149, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5862, PETRI_PLACES=332, PETRI_TRANSITIONS=405} [2024-06-27 19:22:41,322 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 291 predicate places. [2024-06-27 19:22:41,322 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 405 transitions, 5862 flow [2024-06-27 19:22:41,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:22:41,322 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:22:41,322 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:22:41,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-27 19:22:41,323 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:22:41,323 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:22:41,323 INFO L85 PathProgramCache]: Analyzing trace with hash -839622825, now seen corresponding path program 2 times [2024-06-27 19:22:41,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:22:41,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546995006] [2024-06-27 19:22:41,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:22:41,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:22:41,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:22:41,375 INFO 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 19:22:41,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:22:41,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546995006] [2024-06-27 19:22:41,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546995006] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:22:41,376 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:22:41,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:22:41,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893584231] [2024-06-27 19:22:41,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:22:41,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:22:41,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:22:41,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:22:41,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:22:41,414 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:22:41,414 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 405 transitions, 5862 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:22:41,414 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:22:41,414 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:22:41,414 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:22:42,552 INFO L124 PetriNetUnfolderBase]: 4202/7194 cut-off events. [2024-06-27 19:22:42,552 INFO L125 PetriNetUnfolderBase]: For 549025/549030 co-relation queries the response was YES. [2024-06-27 19:22:42,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46798 conditions, 7194 events. 4202/7194 cut-off events. For 549025/549030 co-relation queries the response was YES. Maximal size of possible extension queue 460. Compared 51573 event pairs, 1388 based on Foata normal form. 5/7191 useless extension candidates. Maximal degree in co-relation 46643. Up to 6113 conditions per place. [2024-06-27 19:22:42,646 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 260 selfloop transitions, 160 changer transitions 0/427 dead transitions. [2024-06-27 19:22:42,647 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 427 transitions, 7088 flow [2024-06-27 19:22:42,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:22:42,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:22:42,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-27 19:22:42,647 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6071428571428571 [2024-06-27 19:22:42,648 INFO L175 Difference]: Start difference. First operand has 332 places, 405 transitions, 5862 flow. Second operand 7 states and 170 transitions. [2024-06-27 19:22:42,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 427 transitions, 7088 flow [2024-06-27 19:22:45,132 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 427 transitions, 6917 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-27 19:22:45,137 INFO L231 Difference]: Finished difference. Result has 336 places, 405 transitions, 6017 flow [2024-06-27 19:22:45,138 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5691, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=405, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=160, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6017, PETRI_PLACES=336, PETRI_TRANSITIONS=405} [2024-06-27 19:22:45,138 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 295 predicate places. [2024-06-27 19:22:45,138 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 405 transitions, 6017 flow [2024-06-27 19:22:45,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:22:45,138 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:22:45,138 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:22:45,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-27 19:22:45,139 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:22:45,139 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:22:45,139 INFO L85 PathProgramCache]: Analyzing trace with hash -664123455, now seen corresponding path program 3 times [2024-06-27 19:22:45,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:22:45,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405573135] [2024-06-27 19:22:45,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:22:45,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:22:45,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:22:45,192 INFO 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 19:22:45,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:22:45,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405573135] [2024-06-27 19:22:45,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405573135] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:22:45,192 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:22:45,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:22:45,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501307346] [2024-06-27 19:22:45,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:22:45,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:22:45,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:22:45,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:22:45,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:22:45,224 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:22:45,225 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 405 transitions, 6017 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:22:45,225 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:22:45,225 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:22:45,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:22:46,334 INFO L124 PetriNetUnfolderBase]: 4207/7201 cut-off events. [2024-06-27 19:22:46,335 INFO L125 PetriNetUnfolderBase]: For 563229/563232 co-relation queries the response was YES. [2024-06-27 19:22:46,404 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47116 conditions, 7201 events. 4207/7201 cut-off events. For 563229/563232 co-relation queries the response was YES. Maximal size of possible extension queue 460. Compared 51627 event pairs, 1345 based on Foata normal form. 3/7196 useless extension candidates. Maximal degree in co-relation 46960. Up to 6119 conditions per place. [2024-06-27 19:22:46,423 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 261 selfloop transitions, 156 changer transitions 0/424 dead transitions. [2024-06-27 19:22:46,424 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 424 transitions, 7260 flow [2024-06-27 19:22:46,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:22:46,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:22:46,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2024-06-27 19:22:46,424 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5928571428571429 [2024-06-27 19:22:46,424 INFO L175 Difference]: Start difference. First operand has 336 places, 405 transitions, 6017 flow. Second operand 7 states and 166 transitions. [2024-06-27 19:22:46,425 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 424 transitions, 7260 flow [2024-06-27 19:22:49,634 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 424 transitions, 6748 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-27 19:22:49,639 INFO L231 Difference]: Finished difference. Result has 337 places, 408 transitions, 5858 flow [2024-06-27 19:22:49,639 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5514, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=405, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5858, PETRI_PLACES=337, PETRI_TRANSITIONS=408} [2024-06-27 19:22:49,639 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 296 predicate places. [2024-06-27 19:22:49,639 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 408 transitions, 5858 flow [2024-06-27 19:22:49,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:22:49,640 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:22:49,640 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:22:49,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-27 19:22:49,640 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:22:49,640 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:22:49,640 INFO L85 PathProgramCache]: Analyzing trace with hash -664134615, now seen corresponding path program 4 times [2024-06-27 19:22:49,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:22:49,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044845229] [2024-06-27 19:22:49,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:22:49,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:22:49,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:22:49,694 INFO 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 19:22:49,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:22:49,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044845229] [2024-06-27 19:22:49,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044845229] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:22:49,695 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:22:49,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:22:49,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965131220] [2024-06-27 19:22:49,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:22:49,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:22:49,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:22:49,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:22:49,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:22:49,729 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:22:49,729 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 408 transitions, 5858 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:22:49,729 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:22:49,729 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:22:49,729 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:22:50,850 INFO L124 PetriNetUnfolderBase]: 4204/7197 cut-off events. [2024-06-27 19:22:50,850 INFO L125 PetriNetUnfolderBase]: For 567776/567779 co-relation queries the response was YES. [2024-06-27 19:22:50,922 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46977 conditions, 7197 events. 4204/7197 cut-off events. For 567776/567779 co-relation queries the response was YES. Maximal size of possible extension queue 460. Compared 51599 event pairs, 1355 based on Foata normal form. 3/7192 useless extension candidates. Maximal degree in co-relation 46821. Up to 6116 conditions per place. [2024-06-27 19:22:50,942 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 265 selfloop transitions, 151 changer transitions 0/423 dead transitions. [2024-06-27 19:22:50,943 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 423 transitions, 6896 flow [2024-06-27 19:22:50,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:22:50,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:22:50,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 164 transitions. [2024-06-27 19:22:50,943 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5857142857142857 [2024-06-27 19:22:50,943 INFO L175 Difference]: Start difference. First operand has 337 places, 408 transitions, 5858 flow. Second operand 7 states and 164 transitions. [2024-06-27 19:22:50,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 423 transitions, 6896 flow [2024-06-27 19:22:54,316 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 423 transitions, 6360 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-27 19:22:54,321 INFO L231 Difference]: Finished difference. Result has 337 places, 408 transitions, 5632 flow [2024-06-27 19:22:54,321 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5322, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=408, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=151, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5632, PETRI_PLACES=337, PETRI_TRANSITIONS=408} [2024-06-27 19:22:54,322 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 296 predicate places. [2024-06-27 19:22:54,322 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 408 transitions, 5632 flow [2024-06-27 19:22:54,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:22:54,322 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:22:54,322 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:22:54,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-27 19:22:54,322 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:22:54,322 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:22:54,323 INFO L85 PathProgramCache]: Analyzing trace with hash -563004397, now seen corresponding path program 5 times [2024-06-27 19:22:54,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:22:54,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520385302] [2024-06-27 19:22:54,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:22:54,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:22:54,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:22:54,380 INFO 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 19:22:54,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:22:54,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520385302] [2024-06-27 19:22:54,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520385302] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:22:54,380 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:22:54,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:22:54,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219631015] [2024-06-27 19:22:54,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:22:54,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:22:54,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:22:54,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:22:54,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:22:54,420 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:22:54,420 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 408 transitions, 5632 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:22:54,420 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:22:54,420 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:22:54,420 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:22:55,558 INFO L124 PetriNetUnfolderBase]: 4217/7222 cut-off events. [2024-06-27 19:22:55,558 INFO L125 PetriNetUnfolderBase]: For 582340/582348 co-relation queries the response was YES. [2024-06-27 19:22:55,631 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47103 conditions, 7222 events. 4217/7222 cut-off events. For 582340/582348 co-relation queries the response was YES. Maximal size of possible extension queue 460. Compared 51815 event pairs, 1323 based on Foata normal form. 7/7223 useless extension candidates. Maximal degree in co-relation 46947. Up to 6472 conditions per place. [2024-06-27 19:22:55,653 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 353 selfloop transitions, 74 changer transitions 0/434 dead transitions. [2024-06-27 19:22:55,653 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 434 transitions, 6764 flow [2024-06-27 19:22:55,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:22:55,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:22:55,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 199 transitions. [2024-06-27 19:22:55,654 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5527777777777778 [2024-06-27 19:22:55,654 INFO L175 Difference]: Start difference. First operand has 337 places, 408 transitions, 5632 flow. Second operand 9 states and 199 transitions. [2024-06-27 19:22:55,654 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 434 transitions, 6764 flow [2024-06-27 19:22:58,113 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 434 transitions, 6432 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-27 19:22:58,118 INFO L231 Difference]: Finished difference. Result has 340 places, 414 transitions, 5518 flow [2024-06-27 19:22:58,118 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5312, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=408, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=337, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5518, PETRI_PLACES=340, PETRI_TRANSITIONS=414} [2024-06-27 19:22:58,118 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 299 predicate places. [2024-06-27 19:22:58,118 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 414 transitions, 5518 flow [2024-06-27 19:22:58,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:22:58,118 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:22:58,119 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:22:58,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-27 19:22:58,119 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:22:58,119 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:22:58,119 INFO L85 PathProgramCache]: Analyzing trace with hash -835903755, now seen corresponding path program 6 times [2024-06-27 19:22:58,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:22:58,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048455349] [2024-06-27 19:22:58,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:22:58,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:22:58,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:22:58,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:22:58,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:22:58,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048455349] [2024-06-27 19:22:58,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048455349] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:22:58,177 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:22:58,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:22:58,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268052880] [2024-06-27 19:22:58,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:22:58,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:22:58,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:22:58,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:22:58,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:22:58,202 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:22:58,202 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 414 transitions, 5518 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:22:58,202 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:22:58,203 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:22:58,203 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:22:59,437 INFO L124 PetriNetUnfolderBase]: 4214/7218 cut-off events. [2024-06-27 19:22:59,437 INFO L125 PetriNetUnfolderBase]: For 589601/589609 co-relation queries the response was YES. [2024-06-27 19:22:59,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46869 conditions, 7218 events. 4214/7218 cut-off events. For 589601/589609 co-relation queries the response was YES. Maximal size of possible extension queue 460. Compared 51793 event pairs, 1323 based on Foata normal form. 7/7219 useless extension candidates. Maximal degree in co-relation 46712. Up to 6469 conditions per place. [2024-06-27 19:22:59,522 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 351 selfloop transitions, 73 changer transitions 0/431 dead transitions. [2024-06-27 19:22:59,523 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 431 transitions, 6408 flow [2024-06-27 19:22:59,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:22:59,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:22:59,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 164 transitions. [2024-06-27 19:22:59,523 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5857142857142857 [2024-06-27 19:22:59,523 INFO L175 Difference]: Start difference. First operand has 340 places, 414 transitions, 5518 flow. Second operand 7 states and 164 transitions. [2024-06-27 19:22:59,524 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 431 transitions, 6408 flow [2024-06-27 19:23:02,170 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 431 transitions, 6315 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-27 19:23:02,175 INFO L231 Difference]: Finished difference. Result has 342 places, 414 transitions, 5577 flow [2024-06-27 19:23:02,175 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5425, PETRI_DIFFERENCE_MINUEND_PLACES=335, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=414, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=341, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5577, PETRI_PLACES=342, PETRI_TRANSITIONS=414} [2024-06-27 19:23:02,176 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 301 predicate places. [2024-06-27 19:23:02,176 INFO L495 AbstractCegarLoop]: Abstraction has has 342 places, 414 transitions, 5577 flow [2024-06-27 19:23:02,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:23:02,176 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:23:02,176 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:23:02,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-27 19:23:02,176 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:23:02,176 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:23:02,177 INFO L85 PathProgramCache]: Analyzing trace with hash 444229313, now seen corresponding path program 7 times [2024-06-27 19:23:02,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:23:02,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141928009] [2024-06-27 19:23:02,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:23:02,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:23:02,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:23:02,233 INFO 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 19:23:02,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:23:02,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141928009] [2024-06-27 19:23:02,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141928009] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:23:02,233 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:23:02,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:23:02,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87361708] [2024-06-27 19:23:02,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:23:02,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:23:02,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:23:02,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:23:02,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:23:02,273 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:23:02,273 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 342 places, 414 transitions, 5577 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:23:02,273 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:23:02,274 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:23:02,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:23:03,474 INFO L124 PetriNetUnfolderBase]: 4235/7253 cut-off events. [2024-06-27 19:23:03,474 INFO L125 PetriNetUnfolderBase]: For 608460/608468 co-relation queries the response was YES. [2024-06-27 19:23:03,550 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47517 conditions, 7253 events. 4235/7253 cut-off events. For 608460/608468 co-relation queries the response was YES. Maximal size of possible extension queue 460. Compared 52088 event pairs, 1331 based on Foata normal form. 7/7254 useless extension candidates. Maximal degree in co-relation 47358. Up to 6229 conditions per place. [2024-06-27 19:23:03,571 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 275 selfloop transitions, 168 changer transitions 0/450 dead transitions. [2024-06-27 19:23:03,571 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 450 transitions, 6962 flow [2024-06-27 19:23:03,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:23:03,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:23:03,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 211 transitions. [2024-06-27 19:23:03,572 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5861111111111111 [2024-06-27 19:23:03,572 INFO L175 Difference]: Start difference. First operand has 342 places, 414 transitions, 5577 flow. Second operand 9 states and 211 transitions. [2024-06-27 19:23:03,572 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 450 transitions, 6962 flow [2024-06-27 19:23:07,242 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 450 transitions, 6816 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-27 19:23:07,247 INFO L231 Difference]: Finished difference. Result has 345 places, 423 transitions, 5858 flow [2024-06-27 19:23:07,247 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5431, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=414, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=159, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=255, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5858, PETRI_PLACES=345, PETRI_TRANSITIONS=423} [2024-06-27 19:23:07,248 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 304 predicate places. [2024-06-27 19:23:07,248 INFO L495 AbstractCegarLoop]: Abstraction has has 345 places, 423 transitions, 5858 flow [2024-06-27 19:23:07,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:23:07,248 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:23:07,248 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:23:07,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-27 19:23:07,248 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:23:07,249 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:23:07,249 INFO L85 PathProgramCache]: Analyzing trace with hash 444580853, now seen corresponding path program 8 times [2024-06-27 19:23:07,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:23:07,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196004448] [2024-06-27 19:23:07,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:23:07,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:23:07,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:23:07,305 INFO 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 19:23:07,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:23:07,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196004448] [2024-06-27 19:23:07,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196004448] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:23:07,306 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:23:07,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:23:07,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461942397] [2024-06-27 19:23:07,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:23:07,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:23:07,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:23:07,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:23:07,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:23:07,339 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:23:07,339 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 423 transitions, 5858 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:23:07,339 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:23:07,339 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:23:07,339 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:23:08,497 INFO L124 PetriNetUnfolderBase]: 4240/7259 cut-off events. [2024-06-27 19:23:08,497 INFO L125 PetriNetUnfolderBase]: For 623630/623633 co-relation queries the response was YES. [2024-06-27 19:23:08,572 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48037 conditions, 7259 events. 4240/7259 cut-off events. For 623630/623633 co-relation queries the response was YES. Maximal size of possible extension queue 460. Compared 52130 event pairs, 1332 based on Foata normal form. 3/7254 useless extension candidates. Maximal degree in co-relation 47877. Up to 6235 conditions per place. [2024-06-27 19:23:08,593 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 266 selfloop transitions, 170 changer transitions 0/443 dead transitions. [2024-06-27 19:23:08,593 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 443 transitions, 7155 flow [2024-06-27 19:23:08,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:23:08,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:23:08,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 186 transitions. [2024-06-27 19:23:08,594 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.58125 [2024-06-27 19:23:08,594 INFO L175 Difference]: Start difference. First operand has 345 places, 423 transitions, 5858 flow. Second operand 8 states and 186 transitions. [2024-06-27 19:23:08,594 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 443 transitions, 7155 flow [2024-06-27 19:23:12,133 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 443 transitions, 6813 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-27 19:23:12,138 INFO L231 Difference]: Finished difference. Result has 346 places, 426 transitions, 5897 flow [2024-06-27 19:23:12,138 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5526, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=423, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=167, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5897, PETRI_PLACES=346, PETRI_TRANSITIONS=426} [2024-06-27 19:23:12,138 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 305 predicate places. [2024-06-27 19:23:12,138 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 426 transitions, 5897 flow [2024-06-27 19:23:12,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:23:12,139 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:23:12,139 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:23:12,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-27 19:23:12,139 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:23:12,139 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:23:12,139 INFO L85 PathProgramCache]: Analyzing trace with hash 444407873, now seen corresponding path program 9 times [2024-06-27 19:23:12,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:23:12,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034080265] [2024-06-27 19:23:12,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:23:12,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:23:12,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:23:12,195 INFO 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 19:23:12,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:23:12,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034080265] [2024-06-27 19:23:12,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034080265] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:23:12,196 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:23:12,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:23:12,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830397371] [2024-06-27 19:23:12,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:23:12,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:23:12,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:23:12,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:23:12,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:23:12,227 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:23:12,227 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 426 transitions, 5897 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:23:12,228 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:23:12,228 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:23:12,228 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:23:13,404 INFO L124 PetriNetUnfolderBase]: 4237/7255 cut-off events. [2024-06-27 19:23:13,405 INFO L125 PetriNetUnfolderBase]: For 620129/620132 co-relation queries the response was YES. [2024-06-27 19:23:13,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47906 conditions, 7255 events. 4237/7255 cut-off events. For 620129/620132 co-relation queries the response was YES. Maximal size of possible extension queue 460. Compared 52104 event pairs, 1345 based on Foata normal form. 3/7250 useless extension candidates. Maximal degree in co-relation 47746. Up to 6232 conditions per place. [2024-06-27 19:23:13,503 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 286 selfloop transitions, 148 changer transitions 0/441 dead transitions. [2024-06-27 19:23:13,503 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 441 transitions, 7157 flow [2024-06-27 19:23:13,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:23:13,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:23:13,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 145 transitions. [2024-06-27 19:23:13,504 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6041666666666666 [2024-06-27 19:23:13,504 INFO L175 Difference]: Start difference. First operand has 346 places, 426 transitions, 5897 flow. Second operand 6 states and 145 transitions. [2024-06-27 19:23:13,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 441 transitions, 7157 flow [2024-06-27 19:23:16,456 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 441 transitions, 6882 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-06-27 19:23:16,461 INFO L231 Difference]: Finished difference. Result has 348 places, 426 transitions, 5925 flow [2024-06-27 19:23:16,461 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5622, PETRI_DIFFERENCE_MINUEND_PLACES=342, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=426, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=278, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5925, PETRI_PLACES=348, PETRI_TRANSITIONS=426} [2024-06-27 19:23:16,461 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 307 predicate places. [2024-06-27 19:23:16,461 INFO L495 AbstractCegarLoop]: Abstraction has has 348 places, 426 transitions, 5925 flow [2024-06-27 19:23:16,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:23:16,462 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:23:16,462 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:23:16,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-27 19:23:16,462 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:23:16,462 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:23:16,462 INFO L85 PathProgramCache]: Analyzing trace with hash 444223733, now seen corresponding path program 10 times [2024-06-27 19:23:16,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:23:16,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070598315] [2024-06-27 19:23:16,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:23:16,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:23:16,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:23:16,519 INFO 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 19:23:16,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:23:16,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070598315] [2024-06-27 19:23:16,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070598315] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:23:16,520 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:23:16,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:23:16,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053606093] [2024-06-27 19:23:16,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:23:16,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:23:16,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:23:16,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:23:16,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:23:16,553 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:23:16,553 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 426 transitions, 5925 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:23:16,553 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:23:16,553 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:23:16,553 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:23:17,747 INFO L124 PetriNetUnfolderBase]: 4234/7254 cut-off events. [2024-06-27 19:23:17,747 INFO L125 PetriNetUnfolderBase]: For 628935/628943 co-relation queries the response was YES. [2024-06-27 19:23:17,824 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47954 conditions, 7254 events. 4234/7254 cut-off events. For 628935/628943 co-relation queries the response was YES. Maximal size of possible extension queue 460. Compared 52061 event pairs, 1321 based on Foata normal form. 7/7255 useless extension candidates. Maximal degree in co-relation 47793. Up to 6229 conditions per place. [2024-06-27 19:23:17,845 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 283 selfloop transitions, 165 changer transitions 0/455 dead transitions. [2024-06-27 19:23:17,846 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 455 transitions, 7253 flow [2024-06-27 19:23:17,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:23:17,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:23:17,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-06-27 19:23:17,847 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.61875 [2024-06-27 19:23:17,847 INFO L175 Difference]: Start difference. First operand has 348 places, 426 transitions, 5925 flow. Second operand 8 states and 198 transitions. [2024-06-27 19:23:17,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 455 transitions, 7253 flow [2024-06-27 19:23:20,840 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 350 places, 455 transitions, 6926 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-06-27 19:23:20,845 INFO L231 Difference]: Finished difference. Result has 351 places, 426 transitions, 5939 flow [2024-06-27 19:23:20,845 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5598, PETRI_DIFFERENCE_MINUEND_PLACES=343, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=426, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=165, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5939, PETRI_PLACES=351, PETRI_TRANSITIONS=426} [2024-06-27 19:23:20,845 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 310 predicate places. [2024-06-27 19:23:20,846 INFO L495 AbstractCegarLoop]: Abstraction has has 351 places, 426 transitions, 5939 flow [2024-06-27 19:23:20,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:23:20,846 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:23:20,846 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:23:20,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-27 19:23:20,846 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:23:20,846 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:23:20,846 INFO L85 PathProgramCache]: Analyzing trace with hash 444396713, now seen corresponding path program 11 times [2024-06-27 19:23:20,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:23:20,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865009194] [2024-06-27 19:23:20,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:23:20,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:23:20,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:23:20,907 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:23:20,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:23:20,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865009194] [2024-06-27 19:23:20,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865009194] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:23:20,908 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:23:20,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:23:20,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756942610] [2024-06-27 19:23:20,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:23:20,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:23:20,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:23:20,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:23:20,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:23:20,928 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:23:20,928 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 351 places, 426 transitions, 5939 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:23:20,929 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:23:20,929 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:23:20,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:23:22,148 INFO L124 PetriNetUnfolderBase]: 4231/7247 cut-off events. [2024-06-27 19:23:22,149 INFO L125 PetriNetUnfolderBase]: For 637592/637595 co-relation queries the response was YES. [2024-06-27 19:23:22,238 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48031 conditions, 7247 events. 4231/7247 cut-off events. For 637592/637595 co-relation queries the response was YES. Maximal size of possible extension queue 460. Compared 52063 event pairs, 1345 based on Foata normal form. 3/7242 useless extension candidates. Maximal degree in co-relation 47869. Up to 6226 conditions per place. [2024-06-27 19:23:22,257 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 289 selfloop transitions, 147 changer transitions 0/443 dead transitions. [2024-06-27 19:23:22,258 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 443 transitions, 7035 flow [2024-06-27 19:23:22,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:23:22,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:23:22,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 147 transitions. [2024-06-27 19:23:22,258 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6125 [2024-06-27 19:23:22,258 INFO L175 Difference]: Start difference. First operand has 351 places, 426 transitions, 5939 flow. Second operand 6 states and 147 transitions. [2024-06-27 19:23:22,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 443 transitions, 7035 flow [2024-06-27 19:23:26,020 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 443 transitions, 6681 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-27 19:23:26,025 INFO L231 Difference]: Finished difference. Result has 350 places, 426 transitions, 5889 flow [2024-06-27 19:23:26,025 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5587, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=426, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5889, PETRI_PLACES=350, PETRI_TRANSITIONS=426} [2024-06-27 19:23:26,026 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 309 predicate places. [2024-06-27 19:23:26,026 INFO L495 AbstractCegarLoop]: Abstraction has has 350 places, 426 transitions, 5889 flow [2024-06-27 19:23:26,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:23:26,026 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:23:26,027 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:23:26,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-27 19:23:26,027 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:23:26,027 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:23:26,027 INFO L85 PathProgramCache]: Analyzing trace with hash 444575273, now seen corresponding path program 12 times [2024-06-27 19:23:26,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:23:26,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115771873] [2024-06-27 19:23:26,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:23:26,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:23:26,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:23:26,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:23:26,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:23:26,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115771873] [2024-06-27 19:23:26,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115771873] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:23:26,094 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:23:26,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:23:26,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968283235] [2024-06-27 19:23:26,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:23:26,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:23:26,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:23:26,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:23:26,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:23:26,123 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:23:26,123 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 350 places, 426 transitions, 5889 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:23:26,123 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:23:26,123 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:23:26,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:23:27,301 INFO L124 PetriNetUnfolderBase]: 4228/7243 cut-off events. [2024-06-27 19:23:27,301 INFO L125 PetriNetUnfolderBase]: For 632848/632851 co-relation queries the response was YES. [2024-06-27 19:23:27,377 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47848 conditions, 7243 events. 4228/7243 cut-off events. For 632848/632851 co-relation queries the response was YES. Maximal size of possible extension queue 458. Compared 51999 event pairs, 1332 based on Foata normal form. 3/7238 useless extension candidates. Maximal degree in co-relation 47686. Up to 6223 conditions per place. [2024-06-27 19:23:27,397 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 260 selfloop transitions, 175 changer transitions 0/442 dead transitions. [2024-06-27 19:23:27,397 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 442 transitions, 6797 flow [2024-06-27 19:23:27,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:23:27,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:23:27,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 200 transitions. [2024-06-27 19:23:27,398 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5555555555555556 [2024-06-27 19:23:27,398 INFO L175 Difference]: Start difference. First operand has 350 places, 426 transitions, 5889 flow. Second operand 9 states and 200 transitions. [2024-06-27 19:23:27,398 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 442 transitions, 6797 flow [2024-06-27 19:23:30,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 352 places, 442 transitions, 6453 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-27 19:23:30,259 INFO L231 Difference]: Finished difference. Result has 353 places, 426 transitions, 5901 flow [2024-06-27 19:23:30,260 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5545, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=426, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=175, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5901, PETRI_PLACES=353, PETRI_TRANSITIONS=426} [2024-06-27 19:23:30,260 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 312 predicate places. [2024-06-27 19:23:30,260 INFO L495 AbstractCegarLoop]: Abstraction has has 353 places, 426 transitions, 5901 flow [2024-06-27 19:23:30,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:23:30,260 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:23:30,261 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:23:30,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-27 19:23:30,262 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:23:30,262 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:23:30,262 INFO L85 PathProgramCache]: Analyzing trace with hash 1893304628, now seen corresponding path program 4 times [2024-06-27 19:23:30,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:23:30,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866048052] [2024-06-27 19:23:30,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:23:30,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:23:30,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:23:30,350 INFO 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 19:23:30,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:23:30,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866048052] [2024-06-27 19:23:30,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866048052] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:23:30,351 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:23:30,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:23:30,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594418119] [2024-06-27 19:23:30,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:23:30,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:23:30,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:23:30,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:23:30,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:23:30,387 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:23:30,387 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 426 transitions, 5901 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:23:30,387 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:23:30,387 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:23:30,388 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:23:31,613 INFO L124 PetriNetUnfolderBase]: 4264/7274 cut-off events. [2024-06-27 19:23:31,613 INFO L125 PetriNetUnfolderBase]: For 682880/682883 co-relation queries the response was YES. [2024-06-27 19:23:31,698 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48408 conditions, 7274 events. 4264/7274 cut-off events. For 682880/682883 co-relation queries the response was YES. Maximal size of possible extension queue 461. Compared 52051 event pairs, 1291 based on Foata normal form. 12/7269 useless extension candidates. Maximal degree in co-relation 48245. Up to 6488 conditions per place. [2024-06-27 19:23:31,720 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 349 selfloop transitions, 91 changer transitions 4/451 dead transitions. [2024-06-27 19:23:31,721 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 451 transitions, 6932 flow [2024-06-27 19:23:31,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:23:31,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:23:31,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 206 transitions. [2024-06-27 19:23:31,721 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5722222222222222 [2024-06-27 19:23:31,722 INFO L175 Difference]: Start difference. First operand has 353 places, 426 transitions, 5901 flow. Second operand 9 states and 206 transitions. [2024-06-27 19:23:31,722 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 451 transitions, 6932 flow [2024-06-27 19:23:34,446 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 350 places, 451 transitions, 6406 flow, removed 3 selfloop flow, removed 11 redundant places. [2024-06-27 19:23:34,451 INFO L231 Difference]: Finished difference. Result has 351 places, 427 transitions, 5629 flow [2024-06-27 19:23:34,451 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5375, PETRI_DIFFERENCE_MINUEND_PLACES=342, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=426, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=335, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5629, PETRI_PLACES=351, PETRI_TRANSITIONS=427} [2024-06-27 19:23:34,452 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 310 predicate places. [2024-06-27 19:23:34,452 INFO L495 AbstractCegarLoop]: Abstraction has has 351 places, 427 transitions, 5629 flow [2024-06-27 19:23:34,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:23:34,452 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:23:34,452 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:23:34,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-27 19:23:34,452 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:23:34,453 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:23:34,453 INFO L85 PathProgramCache]: Analyzing trace with hash 78898774, now seen corresponding path program 5 times [2024-06-27 19:23:34,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:23:34,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972353348] [2024-06-27 19:23:34,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:23:34,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:23:34,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:23:34,517 INFO 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 19:23:34,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:23:34,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972353348] [2024-06-27 19:23:34,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972353348] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:23:34,517 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:23:34,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:23:34,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380391587] [2024-06-27 19:23:34,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:23:34,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:23:34,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:23:34,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:23:34,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:23:34,578 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:23:34,578 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 351 places, 427 transitions, 5629 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:23:34,578 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:23:34,578 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:23:34,579 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:23:35,912 INFO L124 PetriNetUnfolderBase]: 4393/7464 cut-off events. [2024-06-27 19:23:35,912 INFO L125 PetriNetUnfolderBase]: For 772700/772700 co-relation queries the response was YES. [2024-06-27 19:23:35,987 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52591 conditions, 7464 events. 4393/7464 cut-off events. For 772700/772700 co-relation queries the response was YES. Maximal size of possible extension queue 477. Compared 53333 event pairs, 1386 based on Foata normal form. 2/7458 useless extension candidates. Maximal degree in co-relation 52427. Up to 6242 conditions per place. [2024-06-27 19:23:36,008 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 243 selfloop transitions, 215 changer transitions 0/465 dead transitions. [2024-06-27 19:23:36,009 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 465 transitions, 7090 flow [2024-06-27 19:23:36,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:23:36,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:23:36,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-06-27 19:23:36,009 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.61875 [2024-06-27 19:23:36,009 INFO L175 Difference]: Start difference. First operand has 351 places, 427 transitions, 5629 flow. Second operand 8 states and 198 transitions. [2024-06-27 19:23:36,010 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 465 transitions, 7090 flow [2024-06-27 19:23:38,876 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 350 places, 465 transitions, 6819 flow, removed 29 selfloop flow, removed 8 redundant places. [2024-06-27 19:23:38,881 INFO L231 Difference]: Finished difference. Result has 352 places, 435 transitions, 6097 flow [2024-06-27 19:23:38,881 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5358, PETRI_DIFFERENCE_MINUEND_PLACES=343, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=427, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=207, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6097, PETRI_PLACES=352, PETRI_TRANSITIONS=435} [2024-06-27 19:23:38,882 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 311 predicate places. [2024-06-27 19:23:38,882 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 435 transitions, 6097 flow [2024-06-27 19:23:38,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:23:38,882 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:23:38,882 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:23:38,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-27 19:23:38,882 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:23:38,882 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:23:38,883 INFO L85 PathProgramCache]: Analyzing trace with hash 1951719412, now seen corresponding path program 6 times [2024-06-27 19:23:38,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:23:38,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427198072] [2024-06-27 19:23:38,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:23:38,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:23:38,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:23:38,946 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:23:38,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:23:38,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427198072] [2024-06-27 19:23:38,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427198072] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:23:38,946 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:23:38,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:23:38,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207265817] [2024-06-27 19:23:38,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:23:38,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:23:38,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:23:38,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:23:38,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:23:38,986 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:23:38,986 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 435 transitions, 6097 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:23:38,986 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:23:38,986 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:23:38,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:23:40,332 INFO L124 PetriNetUnfolderBase]: 4578/7738 cut-off events. [2024-06-27 19:23:40,332 INFO L125 PetriNetUnfolderBase]: For 936148/936148 co-relation queries the response was YES. [2024-06-27 19:23:40,416 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59223 conditions, 7738 events. 4578/7738 cut-off events. For 936148/936148 co-relation queries the response was YES. Maximal size of possible extension queue 504. Compared 55218 event pairs, 1452 based on Foata normal form. 2/7732 useless extension candidates. Maximal degree in co-relation 59057. Up to 6471 conditions per place. [2024-06-27 19:23:40,443 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 254 selfloop transitions, 212 changer transitions 0/473 dead transitions. [2024-06-27 19:23:40,443 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 473 transitions, 7592 flow [2024-06-27 19:23:40,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:23:40,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:23:40,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-06-27 19:23:40,444 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.61875 [2024-06-27 19:23:40,444 INFO L175 Difference]: Start difference. First operand has 352 places, 435 transitions, 6097 flow. Second operand 8 states and 198 transitions. [2024-06-27 19:23:40,444 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 473 transitions, 7592 flow [2024-06-27 19:23:43,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 354 places, 473 transitions, 7114 flow, removed 33 selfloop flow, removed 5 redundant places. [2024-06-27 19:23:43,493 INFO L231 Difference]: Finished difference. Result has 356 places, 443 transitions, 6369 flow [2024-06-27 19:23:43,493 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5619, PETRI_DIFFERENCE_MINUEND_PLACES=347, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=435, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=204, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6369, PETRI_PLACES=356, PETRI_TRANSITIONS=443} [2024-06-27 19:23:43,494 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 315 predicate places. [2024-06-27 19:23:43,494 INFO L495 AbstractCegarLoop]: Abstraction has has 356 places, 443 transitions, 6369 flow [2024-06-27 19:23:43,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:23:43,494 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:23:43,494 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:23:43,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-27 19:23:43,494 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:23:43,494 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:23:43,495 INFO L85 PathProgramCache]: Analyzing trace with hash 1982106808, now seen corresponding path program 7 times [2024-06-27 19:23:43,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:23:43,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903881483] [2024-06-27 19:23:43,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:23:43,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:23:43,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:23:43,562 INFO 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 19:23:43,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:23:43,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903881483] [2024-06-27 19:23:43,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903881483] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:23:43,563 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:23:43,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:23:43,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88216939] [2024-06-27 19:23:43,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:23:43,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:23:43,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:23:43,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:23:43,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:23:43,602 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:23:43,602 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 356 places, 443 transitions, 6369 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:23:43,602 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:23:43,602 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:23:43,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:23:45,003 INFO L124 PetriNetUnfolderBase]: 4573/7737 cut-off events. [2024-06-27 19:23:45,003 INFO L125 PetriNetUnfolderBase]: For 943935/943935 co-relation queries the response was YES. [2024-06-27 19:23:45,091 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59300 conditions, 7737 events. 4573/7737 cut-off events. For 943935/943935 co-relation queries the response was YES. Maximal size of possible extension queue 503. Compared 55304 event pairs, 1459 based on Foata normal form. 2/7732 useless extension candidates. Maximal degree in co-relation 59132. Up to 6663 conditions per place. [2024-06-27 19:23:45,116 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 250 selfloop transitions, 208 changer transitions 0/465 dead transitions. [2024-06-27 19:23:45,117 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 363 places, 465 transitions, 7339 flow [2024-06-27 19:23:45,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:23:45,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:23:45,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 190 transitions. [2024-06-27 19:23:45,117 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.59375 [2024-06-27 19:23:45,117 INFO L175 Difference]: Start difference. First operand has 356 places, 443 transitions, 6369 flow. Second operand 8 states and 190 transitions. [2024-06-27 19:23:45,118 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 363 places, 465 transitions, 7339 flow [2024-06-27 19:23:47,753 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 465 transitions, 6852 flow, removed 41 selfloop flow, removed 5 redundant places. [2024-06-27 19:23:47,758 INFO L231 Difference]: Finished difference. Result has 359 places, 443 transitions, 6303 flow [2024-06-27 19:23:47,759 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5882, PETRI_DIFFERENCE_MINUEND_PLACES=351, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=443, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=208, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6303, PETRI_PLACES=359, PETRI_TRANSITIONS=443} [2024-06-27 19:23:47,759 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 318 predicate places. [2024-06-27 19:23:47,759 INFO L495 AbstractCegarLoop]: Abstraction has has 359 places, 443 transitions, 6303 flow [2024-06-27 19:23:47,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:23:47,759 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:23:47,759 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:23:47,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-27 19:23:47,760 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:23:47,760 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:23:47,760 INFO L85 PathProgramCache]: Analyzing trace with hash 1313361080, now seen corresponding path program 8 times [2024-06-27 19:23:47,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:23:47,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136623841] [2024-06-27 19:23:47,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:23:47,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:23:47,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:23:47,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:23:47,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:23:47,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136623841] [2024-06-27 19:23:47,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136623841] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:23:47,827 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:23:47,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:23:47,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979631014] [2024-06-27 19:23:47,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:23:47,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:23:47,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:23:47,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:23:47,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:23:47,871 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:23:47,871 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 443 transitions, 6303 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:23:47,871 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:23:47,872 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:23:47,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:23:49,236 INFO L124 PetriNetUnfolderBase]: 4581/7749 cut-off events. [2024-06-27 19:23:49,236 INFO L125 PetriNetUnfolderBase]: For 958631/958631 co-relation queries the response was YES. [2024-06-27 19:23:49,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59186 conditions, 7749 events. 4581/7749 cut-off events. For 958631/958631 co-relation queries the response was YES. Maximal size of possible extension queue 503. Compared 55391 event pairs, 1459 based on Foata normal form. 2/7744 useless extension candidates. Maximal degree in co-relation 59017. Up to 6675 conditions per place. [2024-06-27 19:23:49,340 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 255 selfloop transitions, 205 changer transitions 0/467 dead transitions. [2024-06-27 19:23:49,341 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 467 transitions, 7338 flow [2024-06-27 19:23:49,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:23:49,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:23:49,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 190 transitions. [2024-06-27 19:23:49,341 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.59375 [2024-06-27 19:23:49,342 INFO L175 Difference]: Start difference. First operand has 359 places, 443 transitions, 6303 flow. Second operand 8 states and 190 transitions. [2024-06-27 19:23:49,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 467 transitions, 7338 flow [2024-06-27 19:23:52,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 467 transitions, 6879 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-27 19:23:52,209 INFO L231 Difference]: Finished difference. Result has 361 places, 445 transitions, 6324 flow [2024-06-27 19:23:52,210 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5844, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=443, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=203, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6324, PETRI_PLACES=361, PETRI_TRANSITIONS=445} [2024-06-27 19:23:52,210 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 320 predicate places. [2024-06-27 19:23:52,210 INFO L495 AbstractCegarLoop]: Abstraction has has 361 places, 445 transitions, 6324 flow [2024-06-27 19:23:52,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:23:52,210 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:23:52,211 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:23:52,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-27 19:23:52,211 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:23:52,211 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:23:52,211 INFO L85 PathProgramCache]: Analyzing trace with hash 1598400500, now seen corresponding path program 9 times [2024-06-27 19:23:52,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:23:52,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001486351] [2024-06-27 19:23:52,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:23:52,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:23:52,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:23:52,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:23:52,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:23:52,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001486351] [2024-06-27 19:23:52,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001486351] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:23:52,280 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:23:52,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:23:52,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301828599] [2024-06-27 19:23:52,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:23:52,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:23:52,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:23:52,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:23:52,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:23:52,334 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:23:52,335 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 361 places, 445 transitions, 6324 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:23:52,335 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:23:52,335 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:23:52,335 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:23:53,768 INFO L124 PetriNetUnfolderBase]: 4589/7761 cut-off events. [2024-06-27 19:23:53,768 INFO L125 PetriNetUnfolderBase]: For 977239/977239 co-relation queries the response was YES. [2024-06-27 19:23:54,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59503 conditions, 7761 events. 4589/7761 cut-off events. For 977239/977239 co-relation queries the response was YES. Maximal size of possible extension queue 503. Compared 55172 event pairs, 1304 based on Foata normal form. 2/7756 useless extension candidates. Maximal degree in co-relation 59333. Up to 3602 conditions per place. [2024-06-27 19:23:54,157 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 235 selfloop transitions, 242 changer transitions 0/484 dead transitions. [2024-06-27 19:23:54,157 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 484 transitions, 7853 flow [2024-06-27 19:23:54,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:23:54,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:23:54,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 204 transitions. [2024-06-27 19:23:54,158 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6375 [2024-06-27 19:23:54,158 INFO L175 Difference]: Start difference. First operand has 361 places, 445 transitions, 6324 flow. Second operand 8 states and 204 transitions. [2024-06-27 19:23:54,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 484 transitions, 7853 flow [2024-06-27 19:23:57,064 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 484 transitions, 7400 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-27 19:23:57,069 INFO L231 Difference]: Finished difference. Result has 363 places, 447 transitions, 6427 flow [2024-06-27 19:23:57,070 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5871, PETRI_DIFFERENCE_MINUEND_PLACES=355, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=445, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=240, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6427, PETRI_PLACES=363, PETRI_TRANSITIONS=447} [2024-06-27 19:23:57,070 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 322 predicate places. [2024-06-27 19:23:57,070 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 447 transitions, 6427 flow [2024-06-27 19:23:57,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:23:57,070 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:23:57,071 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:23:57,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-27 19:23:57,071 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:23:57,072 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:23:57,072 INFO L85 PathProgramCache]: Analyzing trace with hash 1609828340, now seen corresponding path program 10 times [2024-06-27 19:23:57,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:23:57,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398277093] [2024-06-27 19:23:57,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:23:57,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:23:57,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:23:57,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:23:57,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:23:57,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398277093] [2024-06-27 19:23:57,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398277093] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:23:57,135 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:23:57,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:23:57,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037830739] [2024-06-27 19:23:57,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:23:57,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:23:57,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:23:57,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:23:57,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:23:57,189 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:23:57,189 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 447 transitions, 6427 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:23:57,189 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:23:57,189 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:23:57,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:23:58,662 INFO L124 PetriNetUnfolderBase]: 4564/7720 cut-off events. [2024-06-27 19:23:58,662 INFO L125 PetriNetUnfolderBase]: For 990761/990761 co-relation queries the response was YES. [2024-06-27 19:23:58,741 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59203 conditions, 7720 events. 4564/7720 cut-off events. For 990761/990761 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 54835 event pairs, 1311 based on Foata normal form. 8/7721 useless extension candidates. Maximal degree in co-relation 59032. Up to 3588 conditions per place. [2024-06-27 19:23:58,764 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 245 selfloop transitions, 229 changer transitions 2/483 dead transitions. [2024-06-27 19:23:58,764 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 483 transitions, 7695 flow [2024-06-27 19:23:58,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:23:58,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:23:58,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 203 transitions. [2024-06-27 19:23:58,765 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.634375 [2024-06-27 19:23:58,765 INFO L175 Difference]: Start difference. First operand has 363 places, 447 transitions, 6427 flow. Second operand 8 states and 203 transitions. [2024-06-27 19:23:58,765 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 483 transitions, 7695 flow [2024-06-27 19:24:02,021 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 483 transitions, 7051 flow, removed 69 selfloop flow, removed 8 redundant places. [2024-06-27 19:24:02,026 INFO L231 Difference]: Finished difference. Result has 363 places, 447 transitions, 6247 flow [2024-06-27 19:24:02,026 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5783, PETRI_DIFFERENCE_MINUEND_PLACES=355, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=447, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=229, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6247, PETRI_PLACES=363, PETRI_TRANSITIONS=447} [2024-06-27 19:24:02,026 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 322 predicate places. [2024-06-27 19:24:02,026 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 447 transitions, 6247 flow [2024-06-27 19:24:02,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:24:02,027 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:24:02,027 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:24:02,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-27 19:24:02,027 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:24:02,027 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:24:02,027 INFO L85 PathProgramCache]: Analyzing trace with hash 660163994, now seen corresponding path program 11 times [2024-06-27 19:24:02,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:24:02,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509878259] [2024-06-27 19:24:02,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:24:02,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:24:02,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:24:02,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:24:02,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:24:02,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509878259] [2024-06-27 19:24:02,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509878259] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:24:02,105 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:24:02,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:24:02,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166372163] [2024-06-27 19:24:02,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:24:02,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:24:02,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:24:02,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:24:02,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:24:02,170 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:24:02,170 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 447 transitions, 6247 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:24:02,170 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:24:02,170 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:24:02,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:24:03,568 INFO L124 PetriNetUnfolderBase]: 4572/7750 cut-off events. [2024-06-27 19:24:03,568 INFO L125 PetriNetUnfolderBase]: For 970364/970364 co-relation queries the response was YES. [2024-06-27 19:24:03,653 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58533 conditions, 7750 events. 4572/7750 cut-off events. For 970364/970364 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 55505 event pairs, 1410 based on Foata normal form. 2/7747 useless extension candidates. Maximal degree in co-relation 58364. Up to 7009 conditions per place. [2024-06-27 19:24:03,678 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 380 selfloop transitions, 81 changer transitions 0/468 dead transitions. [2024-06-27 19:24:03,678 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 468 transitions, 7287 flow [2024-06-27 19:24:03,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:24:03,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:24:03,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 182 transitions. [2024-06-27 19:24:03,679 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.56875 [2024-06-27 19:24:03,679 INFO L175 Difference]: Start difference. First operand has 363 places, 447 transitions, 6247 flow. Second operand 8 states and 182 transitions. [2024-06-27 19:24:03,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 468 transitions, 7287 flow [2024-06-27 19:24:07,063 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 468 transitions, 6802 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-27 19:24:07,068 INFO L231 Difference]: Finished difference. Result has 364 places, 449 transitions, 6005 flow [2024-06-27 19:24:07,068 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5764, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=447, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=366, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6005, PETRI_PLACES=364, PETRI_TRANSITIONS=449} [2024-06-27 19:24:07,068 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 323 predicate places. [2024-06-27 19:24:07,068 INFO L495 AbstractCegarLoop]: Abstraction has has 364 places, 449 transitions, 6005 flow [2024-06-27 19:24:07,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:24:07,069 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:24:07,069 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:24:07,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-27 19:24:07,069 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:24:07,069 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:24:07,069 INFO L85 PathProgramCache]: Analyzing trace with hash 60399604, now seen corresponding path program 12 times [2024-06-27 19:24:07,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:24:07,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991250721] [2024-06-27 19:24:07,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:24:07,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:24:07,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:24:07,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:24:07,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:24:07,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991250721] [2024-06-27 19:24:07,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991250721] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:24:07,134 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:24:07,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:24:07,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467746783] [2024-06-27 19:24:07,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:24:07,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:24:07,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:24:07,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:24:07,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:24:07,182 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:24:07,182 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 364 places, 449 transitions, 6005 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:24:07,182 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:24:07,182 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:24:07,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:24:08,878 INFO L124 PetriNetUnfolderBase]: 4549/7691 cut-off events. [2024-06-27 19:24:08,878 INFO L125 PetriNetUnfolderBase]: For 973000/973000 co-relation queries the response was YES. [2024-06-27 19:24:08,953 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56434 conditions, 7691 events. 4549/7691 cut-off events. For 973000/973000 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 54840 event pairs, 1423 based on Foata normal form. 10/7694 useless extension candidates. Maximal degree in co-relation 56264. Up to 6111 conditions per place. [2024-06-27 19:24:08,974 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 266 selfloop transitions, 203 changer transitions 2/478 dead transitions. [2024-06-27 19:24:08,974 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 478 transitions, 7247 flow [2024-06-27 19:24:08,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:24:08,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:24:08,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-27 19:24:08,976 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.615625 [2024-06-27 19:24:08,976 INFO L175 Difference]: Start difference. First operand has 364 places, 449 transitions, 6005 flow. Second operand 8 states and 197 transitions. [2024-06-27 19:24:08,976 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 478 transitions, 7247 flow [2024-06-27 19:24:12,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 365 places, 478 transitions, 7038 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-27 19:24:12,491 INFO L231 Difference]: Finished difference. Result has 366 places, 449 transitions, 6209 flow [2024-06-27 19:24:12,491 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5796, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=449, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=203, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6209, PETRI_PLACES=366, PETRI_TRANSITIONS=449} [2024-06-27 19:24:12,492 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 325 predicate places. [2024-06-27 19:24:12,493 INFO L495 AbstractCegarLoop]: Abstraction has has 366 places, 449 transitions, 6209 flow [2024-06-27 19:24:12,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:24:12,493 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:24:12,493 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:24:12,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-27 19:24:12,495 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:24:12,495 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:24:12,495 INFO L85 PathProgramCache]: Analyzing trace with hash 51828724, now seen corresponding path program 13 times [2024-06-27 19:24:12,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:24:12,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394510499] [2024-06-27 19:24:12,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:24:12,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:24:12,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:24:12,560 INFO 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 19:24:12,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:24:12,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394510499] [2024-06-27 19:24:12,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394510499] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:24:12,561 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:24:12,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:24:12,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981187911] [2024-06-27 19:24:12,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:24:12,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:24:12,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:24:12,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:24:12,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:24:12,592 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:24:12,592 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 366 places, 449 transitions, 6209 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:24:12,592 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:24:12,592 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:24:12,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:24:14,271 INFO L124 PetriNetUnfolderBase]: 4519/7651 cut-off events. [2024-06-27 19:24:14,271 INFO L125 PetriNetUnfolderBase]: For 943073/943073 co-relation queries the response was YES. [2024-06-27 19:24:14,351 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55643 conditions, 7651 events. 4519/7651 cut-off events. For 943073/943073 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 54632 event pairs, 1429 based on Foata normal form. 10/7654 useless extension candidates. Maximal degree in co-relation 55472. Up to 6549 conditions per place. [2024-06-27 19:24:14,375 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 267 selfloop transitions, 197 changer transitions 0/471 dead transitions. [2024-06-27 19:24:14,375 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 373 places, 471 transitions, 7203 flow [2024-06-27 19:24:14,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:24:14,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:24:14,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-27 19:24:14,376 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.596875 [2024-06-27 19:24:14,376 INFO L175 Difference]: Start difference. First operand has 366 places, 449 transitions, 6209 flow. Second operand 8 states and 191 transitions. [2024-06-27 19:24:14,376 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 373 places, 471 transitions, 7203 flow [2024-06-27 19:24:18,350 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 368 places, 471 transitions, 6742 flow, removed 39 selfloop flow, removed 5 redundant places. [2024-06-27 19:24:18,355 INFO L231 Difference]: Finished difference. Result has 369 places, 449 transitions, 6148 flow [2024-06-27 19:24:18,355 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5748, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=449, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=197, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6148, PETRI_PLACES=369, PETRI_TRANSITIONS=449} [2024-06-27 19:24:18,356 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 328 predicate places. [2024-06-27 19:24:18,356 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 449 transitions, 6148 flow [2024-06-27 19:24:18,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:24:18,356 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:24:18,356 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:24:18,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-27 19:24:18,356 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:24:18,357 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:24:18,357 INFO L85 PathProgramCache]: Analyzing trace with hash -1050407752, now seen corresponding path program 14 times [2024-06-27 19:24:18,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:24:18,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201545967] [2024-06-27 19:24:18,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:24:18,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:24:18,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:24:18,430 INFO 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 19:24:18,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:24:18,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201545967] [2024-06-27 19:24:18,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201545967] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:24:18,431 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:24:18,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:24:18,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673898526] [2024-06-27 19:24:18,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:24:18,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:24:18,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:24:18,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:24:18,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:24:18,494 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:24:18,494 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 449 transitions, 6148 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:24:18,494 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:24:18,494 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:24:18,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:24:20,101 INFO L124 PetriNetUnfolderBase]: 4496/7636 cut-off events. [2024-06-27 19:24:20,101 INFO L125 PetriNetUnfolderBase]: For 899721/899721 co-relation queries the response was YES. [2024-06-27 19:24:20,179 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53842 conditions, 7636 events. 4496/7636 cut-off events. For 899721/899721 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 54743 event pairs, 1380 based on Foata normal form. 10/7641 useless extension candidates. Maximal degree in co-relation 53670. Up to 6818 conditions per place. [2024-06-27 19:24:20,199 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 367 selfloop transitions, 96 changer transitions 0/470 dead transitions. [2024-06-27 19:24:20,199 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 470 transitions, 7136 flow [2024-06-27 19:24:20,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:24:20,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:24:20,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 224 transitions. [2024-06-27 19:24:20,200 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.56 [2024-06-27 19:24:20,200 INFO L175 Difference]: Start difference. First operand has 369 places, 449 transitions, 6148 flow. Second operand 10 states and 224 transitions. [2024-06-27 19:24:20,200 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 470 transitions, 7136 flow [2024-06-27 19:24:23,818 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 470 transitions, 6701 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-27 19:24:23,823 INFO L231 Difference]: Finished difference. Result has 371 places, 449 transitions, 5911 flow [2024-06-27 19:24:23,823 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5713, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=449, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=353, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5911, PETRI_PLACES=371, PETRI_TRANSITIONS=449} [2024-06-27 19:24:23,823 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 330 predicate places. [2024-06-27 19:24:23,824 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 449 transitions, 5911 flow [2024-06-27 19:24:23,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:24:23,824 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:24:23,824 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:24:23,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-27 19:24:23,824 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:24:23,824 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:24:23,825 INFO L85 PathProgramCache]: Analyzing trace with hash -822506602, now seen corresponding path program 15 times [2024-06-27 19:24:23,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:24:23,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420093661] [2024-06-27 19:24:23,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:24:23,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:24:23,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:24:23,903 INFO 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 19:24:23,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:24:23,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420093661] [2024-06-27 19:24:23,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420093661] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:24:23,904 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:24:23,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:24:23,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803256539] [2024-06-27 19:24:23,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:24:23,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:24:23,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:24:23,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:24:23,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:24:23,943 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:24:23,943 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 449 transitions, 5911 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:24:23,943 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:24:23,943 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:24:23,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:24:25,595 INFO L124 PetriNetUnfolderBase]: 4473/7603 cut-off events. [2024-06-27 19:24:25,595 INFO L125 PetriNetUnfolderBase]: For 862605/862605 co-relation queries the response was YES. [2024-06-27 19:24:25,678 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52234 conditions, 7603 events. 4473/7603 cut-off events. For 862605/862605 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 54470 event pairs, 1371 based on Foata normal form. 10/7608 useless extension candidates. Maximal degree in co-relation 52061. Up to 6785 conditions per place. [2024-06-27 19:24:25,698 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 369 selfloop transitions, 92 changer transitions 0/468 dead transitions. [2024-06-27 19:24:25,698 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 468 transitions, 6891 flow [2024-06-27 19:24:25,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:24:25,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:24:25,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 186 transitions. [2024-06-27 19:24:25,699 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.58125 [2024-06-27 19:24:25,699 INFO L175 Difference]: Start difference. First operand has 371 places, 449 transitions, 5911 flow. Second operand 8 states and 186 transitions. [2024-06-27 19:24:25,699 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 468 transitions, 6891 flow [2024-06-27 19:24:29,661 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 468 transitions, 6655 flow, removed 24 selfloop flow, removed 8 redundant places. [2024-06-27 19:24:29,666 INFO L231 Difference]: Finished difference. Result has 371 places, 449 transitions, 5865 flow [2024-06-27 19:24:29,666 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5675, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=449, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=357, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5865, PETRI_PLACES=371, PETRI_TRANSITIONS=449} [2024-06-27 19:24:29,667 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 330 predicate places. [2024-06-27 19:24:29,667 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 449 transitions, 5865 flow [2024-06-27 19:24:29,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:24:29,667 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:24:29,667 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:24:29,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-27 19:24:29,667 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:24:29,667 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:24:29,668 INFO L85 PathProgramCache]: Analyzing trace with hash -813935722, now seen corresponding path program 16 times [2024-06-27 19:24:29,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:24:29,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832319258] [2024-06-27 19:24:29,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:24:29,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:24:29,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:24:29,757 INFO 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 19:24:29,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:24:29,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832319258] [2024-06-27 19:24:29,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832319258] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:24:29,757 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:24:29,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:24:29,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783388354] [2024-06-27 19:24:29,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:24:29,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:24:29,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:24:29,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:24:29,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:24:29,805 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:24:29,806 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 449 transitions, 5865 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:24:29,806 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:24:29,806 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:24:29,806 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:24:31,517 INFO L124 PetriNetUnfolderBase]: 4443/7545 cut-off events. [2024-06-27 19:24:31,517 INFO L125 PetriNetUnfolderBase]: For 818574/818574 co-relation queries the response was YES. [2024-06-27 19:24:31,591 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50563 conditions, 7545 events. 4443/7545 cut-off events. For 818574/818574 co-relation queries the response was YES. Maximal size of possible extension queue 484. Compared 53897 event pairs, 1341 based on Foata normal form. 10/7550 useless extension candidates. Maximal degree in co-relation 50389. Up to 6053 conditions per place. [2024-06-27 19:24:31,609 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 366 selfloop transitions, 99 changer transitions 2/474 dead transitions. [2024-06-27 19:24:31,609 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 474 transitions, 6889 flow [2024-06-27 19:24:31,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:24:31,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:24:31,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-27 19:24:31,610 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.596875 [2024-06-27 19:24:31,610 INFO L175 Difference]: Start difference. First operand has 371 places, 449 transitions, 5865 flow. Second operand 8 states and 191 transitions. [2024-06-27 19:24:31,610 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 474 transitions, 6889 flow [2024-06-27 19:24:35,566 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 372 places, 474 transitions, 6625 flow, removed 42 selfloop flow, removed 6 redundant places. [2024-06-27 19:24:35,571 INFO L231 Difference]: Finished difference. Result has 373 places, 449 transitions, 5807 flow [2024-06-27 19:24:35,571 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5601, PETRI_DIFFERENCE_MINUEND_PLACES=365, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=449, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=350, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5807, PETRI_PLACES=373, PETRI_TRANSITIONS=449} [2024-06-27 19:24:35,571 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 332 predicate places. [2024-06-27 19:24:35,571 INFO L495 AbstractCegarLoop]: Abstraction has has 373 places, 449 transitions, 5807 flow [2024-06-27 19:24:35,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:24:35,572 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:24:35,572 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:24:35,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-27 19:24:35,572 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:24:35,572 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:24:35,572 INFO L85 PathProgramCache]: Analyzing trace with hash -636916174, now seen corresponding path program 1 times [2024-06-27 19:24:35,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:24:35,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932293960] [2024-06-27 19:24:35,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:24:35,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:24:35,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:24:35,635 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:24:35,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:24:35,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932293960] [2024-06-27 19:24:35,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932293960] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:24:35,636 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:24:35,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:24:35,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960848800] [2024-06-27 19:24:35,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:24:35,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:24:35,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:24:35,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:24:35,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:24:35,664 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:24:35,664 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 449 transitions, 5807 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:24:35,664 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:24:35,665 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:24:35,665 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:24:37,237 INFO L124 PetriNetUnfolderBase]: 4451/7563 cut-off events. [2024-06-27 19:24:37,238 INFO L125 PetriNetUnfolderBase]: For 784905/784905 co-relation queries the response was YES. [2024-06-27 19:24:37,316 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50298 conditions, 7563 events. 4451/7563 cut-off events. For 784905/784905 co-relation queries the response was YES. Maximal size of possible extension queue 485. Compared 54117 event pairs, 1353 based on Foata normal form. 2/7560 useless extension candidates. Maximal degree in co-relation 50123. Up to 6833 conditions per place. [2024-06-27 19:24:37,336 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 385 selfloop transitions, 74 changer transitions 0/466 dead transitions. [2024-06-27 19:24:37,336 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 466 transitions, 6812 flow [2024-06-27 19:24:37,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:24:37,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:24:37,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-06-27 19:24:37,337 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5821428571428572 [2024-06-27 19:24:37,337 INFO L175 Difference]: Start difference. First operand has 373 places, 449 transitions, 5807 flow. Second operand 7 states and 163 transitions. [2024-06-27 19:24:37,337 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 466 transitions, 6812 flow [2024-06-27 19:24:41,439 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 372 places, 466 transitions, 6591 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-27 19:24:41,444 INFO L231 Difference]: Finished difference. Result has 373 places, 451 transitions, 5794 flow [2024-06-27 19:24:41,444 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5586, PETRI_DIFFERENCE_MINUEND_PLACES=366, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=449, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=375, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5794, PETRI_PLACES=373, PETRI_TRANSITIONS=451} [2024-06-27 19:24:41,444 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 332 predicate places. [2024-06-27 19:24:41,444 INFO L495 AbstractCegarLoop]: Abstraction has has 373 places, 451 transitions, 5794 flow [2024-06-27 19:24:41,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:24:41,444 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:24:41,445 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:24:41,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-27 19:24:41,445 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:24:41,445 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:24:41,445 INFO L85 PathProgramCache]: Analyzing trace with hash -636440944, now seen corresponding path program 2 times [2024-06-27 19:24:41,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:24:41,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547562120] [2024-06-27 19:24:41,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:24:41,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:24:41,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:24:41,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:24:41,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:24:41,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547562120] [2024-06-27 19:24:41,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547562120] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:24:41,507 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:24:41,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:24:41,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956362608] [2024-06-27 19:24:41,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:24:41,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:24:41,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:24:41,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:24:41,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:24:41,541 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:24:41,541 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 451 transitions, 5794 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:24:41,541 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:24:41,541 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:24:41,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:24:43,118 INFO L124 PetriNetUnfolderBase]: 4500/7624 cut-off events. [2024-06-27 19:24:43,118 INFO L125 PetriNetUnfolderBase]: For 832109/832109 co-relation queries the response was YES. [2024-06-27 19:24:43,195 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51227 conditions, 7624 events. 4500/7624 cut-off events. For 832109/832109 co-relation queries the response was YES. Maximal size of possible extension queue 491. Compared 54498 event pairs, 1348 based on Foata normal form. 2/7621 useless extension candidates. Maximal degree in co-relation 51051. Up to 6823 conditions per place. [2024-06-27 19:24:43,215 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 390 selfloop transitions, 78 changer transitions 1/476 dead transitions. [2024-06-27 19:24:43,216 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 476 transitions, 7088 flow [2024-06-27 19:24:43,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:24:43,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:24:43,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-27 19:24:43,217 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-27 19:24:43,217 INFO L175 Difference]: Start difference. First operand has 373 places, 451 transitions, 5794 flow. Second operand 7 states and 168 transitions. [2024-06-27 19:24:43,217 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 476 transitions, 7088 flow [2024-06-27 19:24:47,201 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 374 places, 476 transitions, 6881 flow, removed 31 selfloop flow, removed 5 redundant places. [2024-06-27 19:24:47,206 INFO L231 Difference]: Finished difference. Result has 376 places, 455 transitions, 5848 flow [2024-06-27 19:24:47,206 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5591, PETRI_DIFFERENCE_MINUEND_PLACES=368, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=451, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=373, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5848, PETRI_PLACES=376, PETRI_TRANSITIONS=455} [2024-06-27 19:24:47,206 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 335 predicate places. [2024-06-27 19:24:47,207 INFO L495 AbstractCegarLoop]: Abstraction has has 376 places, 455 transitions, 5848 flow [2024-06-27 19:24:47,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:24:47,207 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:24:47,207 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:24:47,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-27 19:24:47,207 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:24:47,207 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:24:47,207 INFO L85 PathProgramCache]: Analyzing trace with hash -554997262, now seen corresponding path program 17 times [2024-06-27 19:24:47,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:24:47,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114869666] [2024-06-27 19:24:47,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:24:47,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:24:47,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:24:47,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:24:47,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:24:47,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114869666] [2024-06-27 19:24:47,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114869666] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:24:47,279 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:24:47,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:24:47,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43953770] [2024-06-27 19:24:47,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:24:47,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:24:47,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:24:47,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:24:47,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:24:47,327 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:24:47,327 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 376 places, 455 transitions, 5848 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:24:47,328 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:24:47,328 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:24:47,328 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:24:48,909 INFO L124 PetriNetUnfolderBase]: 4386/7429 cut-off events. [2024-06-27 19:24:48,910 INFO L125 PetriNetUnfolderBase]: For 802479/802482 co-relation queries the response was YES. [2024-06-27 19:24:49,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45458 conditions, 7429 events. 4386/7429 cut-off events. For 802479/802482 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 53090 event pairs, 1198 based on Foata normal form. 46/7446 useless extension candidates. Maximal degree in co-relation 45280. Up to 6115 conditions per place. [2024-06-27 19:24:49,182 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 294 selfloop transitions, 191 changer transitions 3/495 dead transitions. [2024-06-27 19:24:49,182 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 384 places, 495 transitions, 6942 flow [2024-06-27 19:24:49,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:24:49,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:24:49,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 232 transitions. [2024-06-27 19:24:49,183 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6444444444444445 [2024-06-27 19:24:49,183 INFO L175 Difference]: Start difference. First operand has 376 places, 455 transitions, 5848 flow. Second operand 9 states and 232 transitions. [2024-06-27 19:24:49,183 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 384 places, 495 transitions, 6942 flow [2024-06-27 19:24:51,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 380 places, 495 transitions, 6713 flow, removed 43 selfloop flow, removed 4 redundant places. [2024-06-27 19:24:51,588 INFO L231 Difference]: Finished difference. Result has 381 places, 454 transitions, 6001 flow [2024-06-27 19:24:51,588 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5619, PETRI_DIFFERENCE_MINUEND_PLACES=372, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=455, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=191, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6001, PETRI_PLACES=381, PETRI_TRANSITIONS=454} [2024-06-27 19:24:51,589 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 340 predicate places. [2024-06-27 19:24:51,589 INFO L495 AbstractCegarLoop]: Abstraction has has 381 places, 454 transitions, 6001 flow [2024-06-27 19:24:51,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:24:51,589 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:24:51,589 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:24:51,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-27 19:24:51,589 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:24:51,590 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:24:51,590 INFO L85 PathProgramCache]: Analyzing trace with hash 1250539718, now seen corresponding path program 18 times [2024-06-27 19:24:51,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:24:51,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470357263] [2024-06-27 19:24:51,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:24:51,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:24:51,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:24:51,664 INFO 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 19:24:51,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:24:51,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470357263] [2024-06-27 19:24:51,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470357263] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:24:51,665 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:24:51,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:24:51,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558889778] [2024-06-27 19:24:51,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:24:51,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:24:51,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:24:51,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:24:51,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:24:51,705 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:24:51,705 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 381 places, 454 transitions, 6001 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:24:51,705 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:24:51,705 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:24:51,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:24:53,380 INFO L124 PetriNetUnfolderBase]: 4323/7359 cut-off events. [2024-06-27 19:24:53,380 INFO L125 PetriNetUnfolderBase]: For 563189/563189 co-relation queries the response was YES. [2024-06-27 19:24:53,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43878 conditions, 7359 events. 4323/7359 cut-off events. For 563189/563189 co-relation queries the response was YES. Maximal size of possible extension queue 484. Compared 52661 event pairs, 1273 based on Foata normal form. 10/7364 useless extension candidates. Maximal degree in co-relation 43699. Up to 6264 conditions per place. [2024-06-27 19:24:53,471 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 293 selfloop transitions, 193 changer transitions 0/493 dead transitions. [2024-06-27 19:24:53,471 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 390 places, 493 transitions, 7083 flow [2024-06-27 19:24:53,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:24:53,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:24:53,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 246 transitions. [2024-06-27 19:24:53,472 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.615 [2024-06-27 19:24:53,472 INFO L175 Difference]: Start difference. First operand has 381 places, 454 transitions, 6001 flow. Second operand 10 states and 246 transitions. [2024-06-27 19:24:53,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 390 places, 493 transitions, 7083 flow [2024-06-27 19:24:56,468 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 493 transitions, 6643 flow, removed 26 selfloop flow, removed 9 redundant places. [2024-06-27 19:24:56,474 INFO L231 Difference]: Finished difference. Result has 382 places, 454 transitions, 5963 flow [2024-06-27 19:24:56,474 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5561, PETRI_DIFFERENCE_MINUEND_PLACES=372, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=454, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=193, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5963, PETRI_PLACES=382, PETRI_TRANSITIONS=454} [2024-06-27 19:24:56,474 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 341 predicate places. [2024-06-27 19:24:56,474 INFO L495 AbstractCegarLoop]: Abstraction has has 382 places, 454 transitions, 5963 flow [2024-06-27 19:24:56,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:24:56,474 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:24:56,475 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:24:56,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-27 19:24:56,475 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:24:56,475 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:24:56,475 INFO L85 PathProgramCache]: Analyzing trace with hash -879845132, now seen corresponding path program 19 times [2024-06-27 19:24:56,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:24:56,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105394626] [2024-06-27 19:24:56,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:24:56,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:24:56,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:24:56,547 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:24:56,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:24:56,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105394626] [2024-06-27 19:24:56,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105394626] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:24:56,547 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:24:56,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:24:56,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977177574] [2024-06-27 19:24:56,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:24:56,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:24:56,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:24:56,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:24:56,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:24:56,657 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:24:56,658 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 382 places, 454 transitions, 5963 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:24:56,658 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:24:56,658 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:24:56,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:24:58,137 INFO L124 PetriNetUnfolderBase]: 4300/7321 cut-off events. [2024-06-27 19:24:58,137 INFO L125 PetriNetUnfolderBase]: For 492844/492844 co-relation queries the response was YES. [2024-06-27 19:24:58,208 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42049 conditions, 7321 events. 4300/7321 cut-off events. For 492844/492844 co-relation queries the response was YES. Maximal size of possible extension queue 483. Compared 52317 event pairs, 1259 based on Foata normal form. 10/7326 useless extension candidates. Maximal degree in co-relation 41870. Up to 6237 conditions per place. [2024-06-27 19:24:58,223 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 299 selfloop transitions, 179 changer transitions 0/485 dead transitions. [2024-06-27 19:24:58,223 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 389 places, 485 transitions, 7009 flow [2024-06-27 19:24:58,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:24:58,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:24:58,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 200 transitions. [2024-06-27 19:24:58,224 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-27 19:24:58,224 INFO L175 Difference]: Start difference. First operand has 382 places, 454 transitions, 5963 flow. Second operand 8 states and 200 transitions. [2024-06-27 19:24:58,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 389 places, 485 transitions, 7009 flow [2024-06-27 19:25:01,000 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 485 transitions, 6565 flow, removed 24 selfloop flow, removed 11 redundant places. [2024-06-27 19:25:01,005 INFO L231 Difference]: Finished difference. Result has 379 places, 454 transitions, 5890 flow [2024-06-27 19:25:01,005 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5519, PETRI_DIFFERENCE_MINUEND_PLACES=371, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=454, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=179, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5890, PETRI_PLACES=379, PETRI_TRANSITIONS=454} [2024-06-27 19:25:01,006 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 338 predicate places. [2024-06-27 19:25:01,006 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 454 transitions, 5890 flow [2024-06-27 19:25:01,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:25:01,006 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:25:01,006 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:25:01,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-27 19:25:01,006 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:25:01,007 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:25:01,007 INFO L85 PathProgramCache]: Analyzing trace with hash 1487011748, now seen corresponding path program 20 times [2024-06-27 19:25:01,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:25:01,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988040102] [2024-06-27 19:25:01,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:25:01,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:25:01,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:25:01,076 INFO 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 19:25:01,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:25:01,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988040102] [2024-06-27 19:25:01,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988040102] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:25:01,077 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:25:01,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:25:01,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787473223] [2024-06-27 19:25:01,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:25:01,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:25:01,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:25:01,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:25:01,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:25:01,182 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:25:01,182 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 454 transitions, 5890 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:25:01,182 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:25:01,183 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:25:01,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:25:02,683 INFO L124 PetriNetUnfolderBase]: 4270/7278 cut-off events. [2024-06-27 19:25:02,683 INFO L125 PetriNetUnfolderBase]: For 424825/424825 co-relation queries the response was YES. [2024-06-27 19:25:02,757 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40182 conditions, 7278 events. 4270/7278 cut-off events. For 424825/424825 co-relation queries the response was YES. Maximal size of possible extension queue 482. Compared 51832 event pairs, 1094 based on Foata normal form. 10/7283 useless extension candidates. Maximal degree in co-relation 40004. Up to 4412 conditions per place. [2024-06-27 19:25:02,776 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 281 selfloop transitions, 201 changer transitions 2/491 dead transitions. [2024-06-27 19:25:02,776 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 491 transitions, 6980 flow [2024-06-27 19:25:02,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:25:02,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:25:02,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 205 transitions. [2024-06-27 19:25:02,777 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.640625 [2024-06-27 19:25:02,777 INFO L175 Difference]: Start difference. First operand has 379 places, 454 transitions, 5890 flow. Second operand 8 states and 205 transitions. [2024-06-27 19:25:02,777 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 491 transitions, 6980 flow [2024-06-27 19:25:05,945 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 491 transitions, 6565 flow, removed 23 selfloop flow, removed 8 redundant places. [2024-06-27 19:25:05,950 INFO L231 Difference]: Finished difference. Result has 379 places, 454 transitions, 5895 flow [2024-06-27 19:25:05,950 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5475, PETRI_DIFFERENCE_MINUEND_PLACES=371, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=454, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=201, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=253, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5895, PETRI_PLACES=379, PETRI_TRANSITIONS=454} [2024-06-27 19:25:05,968 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 338 predicate places. [2024-06-27 19:25:05,968 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 454 transitions, 5895 flow [2024-06-27 19:25:05,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:25:05,968 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:25:05,968 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:25:05,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-27 19:25:05,969 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:25:05,969 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:25:05,969 INFO L85 PathProgramCache]: Analyzing trace with hash -913306356, now seen corresponding path program 3 times [2024-06-27 19:25:05,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:25:05,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263187917] [2024-06-27 19:25:05,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:25:05,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:25:05,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:25:06,036 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:25:06,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:25:06,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263187917] [2024-06-27 19:25:06,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263187917] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:25:06,037 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:25:06,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:25:06,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180981631] [2024-06-27 19:25:06,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:25:06,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:25:06,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:25:06,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:25:06,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:25:06,064 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:25:06,064 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 454 transitions, 5895 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:25:06,064 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:25:06,065 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:25:06,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:25:07,497 INFO L124 PetriNetUnfolderBase]: 4311/7299 cut-off events. [2024-06-27 19:25:07,497 INFO L125 PetriNetUnfolderBase]: For 415077/415077 co-relation queries the response was YES. [2024-06-27 19:25:07,573 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41191 conditions, 7299 events. 4311/7299 cut-off events. For 415077/415077 co-relation queries the response was YES. Maximal size of possible extension queue 488. Compared 51848 event pairs, 1219 based on Foata normal form. 2/7291 useless extension candidates. Maximal degree in co-relation 41013. Up to 6360 conditions per place. [2024-06-27 19:25:07,591 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 383 selfloop transitions, 89 changer transitions 0/479 dead transitions. [2024-06-27 19:25:07,591 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 384 places, 479 transitions, 7182 flow [2024-06-27 19:25:07,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:25:07,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:25:07,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 151 transitions. [2024-06-27 19:25:07,592 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6291666666666667 [2024-06-27 19:25:07,592 INFO L175 Difference]: Start difference. First operand has 379 places, 454 transitions, 5895 flow. Second operand 6 states and 151 transitions. [2024-06-27 19:25:07,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 384 places, 479 transitions, 7182 flow [2024-06-27 19:25:10,247 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 375 places, 479 transitions, 6694 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-27 19:25:10,252 INFO L231 Difference]: Finished difference. Result has 377 places, 457 transitions, 5702 flow [2024-06-27 19:25:10,253 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5409, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=454, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=365, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5702, PETRI_PLACES=377, PETRI_TRANSITIONS=457} [2024-06-27 19:25:10,253 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 336 predicate places. [2024-06-27 19:25:10,253 INFO L495 AbstractCegarLoop]: Abstraction has has 377 places, 457 transitions, 5702 flow [2024-06-27 19:25:10,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:25:10,253 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:25:10,254 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:25:10,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-27 19:25:10,254 INFO L420 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:25:10,254 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:25:10,254 INFO L85 PathProgramCache]: Analyzing trace with hash 2109215526, now seen corresponding path program 4 times [2024-06-27 19:25:10,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:25:10,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384089498] [2024-06-27 19:25:10,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:25:10,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:25:10,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:25:10,317 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:25:10,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:25:10,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384089498] [2024-06-27 19:25:10,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384089498] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:25:10,317 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:25:10,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:25:10,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698515587] [2024-06-27 19:25:10,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:25:10,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:25:10,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:25:10,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:25:10,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:25:10,346 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:25:10,347 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 377 places, 457 transitions, 5702 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:25:10,347 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:25:10,347 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:25:10,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:25:11,757 INFO L124 PetriNetUnfolderBase]: 4299/7319 cut-off events. [2024-06-27 19:25:11,758 INFO L125 PetriNetUnfolderBase]: For 401344/401344 co-relation queries the response was YES. [2024-06-27 19:25:11,832 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40319 conditions, 7319 events. 4299/7319 cut-off events. For 401344/401344 co-relation queries the response was YES. Maximal size of possible extension queue 488. Compared 52281 event pairs, 1261 based on Foata normal form. 2/7316 useless extension candidates. Maximal degree in co-relation 40140. Up to 6591 conditions per place. [2024-06-27 19:25:11,849 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 388 selfloop transitions, 79 changer transitions 0/474 dead transitions. [2024-06-27 19:25:11,849 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 474 transitions, 6678 flow [2024-06-27 19:25:11,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:25:11,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:25:11,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 146 transitions. [2024-06-27 19:25:11,850 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6083333333333333 [2024-06-27 19:25:11,850 INFO L175 Difference]: Start difference. First operand has 377 places, 457 transitions, 5702 flow. Second operand 6 states and 146 transitions. [2024-06-27 19:25:11,850 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 474 transitions, 6678 flow [2024-06-27 19:25:14,712 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 379 places, 474 transitions, 6468 flow, removed 34 selfloop flow, removed 3 redundant places. [2024-06-27 19:25:14,717 INFO L231 Difference]: Finished difference. Result has 380 places, 457 transitions, 5658 flow [2024-06-27 19:25:14,718 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5492, PETRI_DIFFERENCE_MINUEND_PLACES=374, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=457, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=378, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5658, PETRI_PLACES=380, PETRI_TRANSITIONS=457} [2024-06-27 19:25:14,718 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 339 predicate places. [2024-06-27 19:25:14,718 INFO L495 AbstractCegarLoop]: Abstraction has has 380 places, 457 transitions, 5658 flow [2024-06-27 19:25:14,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:25:14,718 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:25:14,718 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:25:14,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-27 19:25:14,719 INFO L420 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:25:14,719 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:25:14,719 INFO L85 PathProgramCache]: Analyzing trace with hash 535285794, now seen corresponding path program 5 times [2024-06-27 19:25:14,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:25:14,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622074701] [2024-06-27 19:25:14,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:25:14,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:25:14,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:25:14,782 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 19:25:14,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:25:14,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622074701] [2024-06-27 19:25:14,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622074701] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:25:14,783 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:25:14,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:25:14,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197336326] [2024-06-27 19:25:14,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:25:14,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:25:14,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:25:14,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:25:14,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:25:14,846 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:25:14,846 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 380 places, 457 transitions, 5658 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:25:14,846 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:25:14,846 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:25:14,846 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:25:16,380 INFO L124 PetriNetUnfolderBase]: 4294/7319 cut-off events. [2024-06-27 19:25:16,380 INFO L125 PetriNetUnfolderBase]: For 401174/401177 co-relation queries the response was YES. [2024-06-27 19:25:16,453 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39481 conditions, 7319 events. 4294/7319 cut-off events. For 401174/401177 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 52091 event pairs, 1053 based on Foata normal form. 10/7321 useless extension candidates. Maximal degree in co-relation 39301. Up to 5438 conditions per place. [2024-06-27 19:25:16,468 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 393 selfloop transitions, 84 changer transitions 0/484 dead transitions. [2024-06-27 19:25:16,468 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 385 places, 484 transitions, 7160 flow [2024-06-27 19:25:16,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:25:16,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:25:16,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-27 19:25:16,469 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6208333333333333 [2024-06-27 19:25:16,469 INFO L175 Difference]: Start difference. First operand has 380 places, 457 transitions, 5658 flow. Second operand 6 states and 149 transitions. [2024-06-27 19:25:16,469 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 385 places, 484 transitions, 7160 flow [2024-06-27 19:25:19,181 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 379 places, 484 transitions, 6915 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-27 19:25:19,186 INFO L231 Difference]: Finished difference. Result has 380 places, 459 transitions, 5645 flow [2024-06-27 19:25:19,186 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5417, PETRI_DIFFERENCE_MINUEND_PLACES=374, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=457, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=374, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5645, PETRI_PLACES=380, PETRI_TRANSITIONS=459} [2024-06-27 19:25:19,186 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 339 predicate places. [2024-06-27 19:25:19,187 INFO L495 AbstractCegarLoop]: Abstraction has has 380 places, 459 transitions, 5645 flow [2024-06-27 19:25:19,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:25:19,187 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:25:19,187 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:25:19,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-27 19:25:19,187 INFO L420 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:25:19,187 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:25:19,187 INFO L85 PathProgramCache]: Analyzing trace with hash -1082989522, now seen corresponding path program 6 times [2024-06-27 19:25:19,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:25:19,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678553209] [2024-06-27 19:25:19,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:25:19,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:25:19,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:25:19,247 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:25:19,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:25:19,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678553209] [2024-06-27 19:25:19,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678553209] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:25:19,247 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:25:19,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:25:19,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885629566] [2024-06-27 19:25:19,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:25:19,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:25:19,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:25:19,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:25:19,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:25:19,399 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:25:19,399 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 380 places, 459 transitions, 5645 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:25:19,399 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:25:19,399 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:25:19,399 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:25:20,749 INFO L124 PetriNetUnfolderBase]: 4282/7297 cut-off events. [2024-06-27 19:25:20,749 INFO L125 PetriNetUnfolderBase]: For 358773/358776 co-relation queries the response was YES. [2024-06-27 19:25:20,825 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39340 conditions, 7297 events. 4282/7297 cut-off events. For 358773/358776 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 51950 event pairs, 1033 based on Foata normal form. 4/7293 useless extension candidates. Maximal degree in co-relation 39159. Up to 5430 conditions per place. [2024-06-27 19:25:20,843 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 386 selfloop transitions, 93 changer transitions 0/486 dead transitions. [2024-06-27 19:25:20,843 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 385 places, 486 transitions, 7105 flow [2024-06-27 19:25:20,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:25:20,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:25:20,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-06-27 19:25:20,844 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6375 [2024-06-27 19:25:20,844 INFO L175 Difference]: Start difference. First operand has 380 places, 459 transitions, 5645 flow. Second operand 6 states and 153 transitions. [2024-06-27 19:25:20,844 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 385 places, 486 transitions, 7105 flow [2024-06-27 19:25:23,823 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 382 places, 486 transitions, 6883 flow, removed 35 selfloop flow, removed 3 redundant places. [2024-06-27 19:25:23,828 INFO L231 Difference]: Finished difference. Result has 383 places, 459 transitions, 5614 flow [2024-06-27 19:25:23,828 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5423, PETRI_DIFFERENCE_MINUEND_PLACES=377, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=459, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=366, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5614, PETRI_PLACES=383, PETRI_TRANSITIONS=459} [2024-06-27 19:25:23,828 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 342 predicate places. [2024-06-27 19:25:23,829 INFO L495 AbstractCegarLoop]: Abstraction has has 383 places, 459 transitions, 5614 flow [2024-06-27 19:25:23,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:25:23,829 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:25:23,829 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:25:23,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-27 19:25:23,829 INFO L420 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:25:23,829 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:25:23,829 INFO L85 PathProgramCache]: Analyzing trace with hash -1907598778, now seen corresponding path program 1 times [2024-06-27 19:25:23,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:25:23,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506973109] [2024-06-27 19:25:23,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:25:23,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:25:23,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:25:23,894 INFO 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 19:25:23,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:25:23,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506973109] [2024-06-27 19:25:23,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506973109] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:25:23,895 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:25:23,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:25:23,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470507391] [2024-06-27 19:25:23,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:25:23,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:25:23,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:25:23,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:25:23,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:25:23,943 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:25:23,944 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 383 places, 459 transitions, 5614 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:25:23,944 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:25:23,944 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:25:23,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:25:25,748 INFO L124 PetriNetUnfolderBase]: 4675/7887 cut-off events. [2024-06-27 19:25:25,748 INFO L125 PetriNetUnfolderBase]: For 804784/804784 co-relation queries the response was YES. [2024-06-27 19:25:25,836 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50486 conditions, 7887 events. 4675/7887 cut-off events. For 804784/804784 co-relation queries the response was YES. Maximal size of possible extension queue 510. Compared 56287 event pairs, 1130 based on Foata normal form. 6/7830 useless extension candidates. Maximal degree in co-relation 50304. Up to 4131 conditions per place. [2024-06-27 19:25:25,857 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 286 selfloop transitions, 219 changer transitions 0/512 dead transitions. [2024-06-27 19:25:25,857 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 390 places, 512 transitions, 7412 flow [2024-06-27 19:25:25,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:25:25,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:25:25,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 213 transitions. [2024-06-27 19:25:25,858 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.665625 [2024-06-27 19:25:25,858 INFO L175 Difference]: Start difference. First operand has 383 places, 459 transitions, 5614 flow. Second operand 8 states and 213 transitions. [2024-06-27 19:25:25,858 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 390 places, 512 transitions, 7412 flow [2024-06-27 19:25:30,611 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 383 places, 512 transitions, 7127 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-27 19:25:30,616 INFO L231 Difference]: Finished difference. Result has 385 places, 463 transitions, 5930 flow [2024-06-27 19:25:30,617 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5329, PETRI_DIFFERENCE_MINUEND_PLACES=376, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=459, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=216, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5930, PETRI_PLACES=385, PETRI_TRANSITIONS=463} [2024-06-27 19:25:30,617 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 344 predicate places. [2024-06-27 19:25:30,617 INFO L495 AbstractCegarLoop]: Abstraction has has 385 places, 463 transitions, 5930 flow [2024-06-27 19:25:30,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:25:30,617 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:25:30,617 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:25:30,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-27 19:25:30,617 INFO L420 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:25:30,618 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:25:30,618 INFO L85 PathProgramCache]: Analyzing trace with hash 916789516, now seen corresponding path program 1 times [2024-06-27 19:25:30,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:25:30,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030393069] [2024-06-27 19:25:30,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:25:30,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:25:30,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:25:30,673 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:25:30,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:25:30,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030393069] [2024-06-27 19:25:30,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030393069] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:25:30,674 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:25:30,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:25:30,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916526059] [2024-06-27 19:25:30,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:25:30,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:25:30,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:25:30,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:25:30,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:25:30,712 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:25:30,712 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 385 places, 463 transitions, 5930 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:25:30,712 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:25:30,712 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:25:30,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:25:32,311 INFO L124 PetriNetUnfolderBase]: 4703/7998 cut-off events. [2024-06-27 19:25:32,311 INFO L125 PetriNetUnfolderBase]: For 820183/820186 co-relation queries the response was YES. [2024-06-27 19:25:32,397 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50733 conditions, 7998 events. 4703/7998 cut-off events. For 820183/820186 co-relation queries the response was YES. Maximal size of possible extension queue 517. Compared 57521 event pairs, 1154 based on Foata normal form. 8/7998 useless extension candidates. Maximal degree in co-relation 50551. Up to 6073 conditions per place. [2024-06-27 19:25:32,418 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 394 selfloop transitions, 96 changer transitions 0/497 dead transitions. [2024-06-27 19:25:32,419 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 391 places, 497 transitions, 7473 flow [2024-06-27 19:25:32,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:25:32,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:25:32,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-27 19:25:32,419 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6142857142857143 [2024-06-27 19:25:32,420 INFO L175 Difference]: Start difference. First operand has 385 places, 463 transitions, 5930 flow. Second operand 7 states and 172 transitions. [2024-06-27 19:25:32,420 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 391 places, 497 transitions, 7473 flow [2024-06-27 19:25:36,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 385 places, 497 transitions, 6923 flow, removed 38 selfloop flow, removed 6 redundant places. [2024-06-27 19:25:36,647 INFO L231 Difference]: Finished difference. Result has 387 places, 466 transitions, 5620 flow [2024-06-27 19:25:36,648 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5382, PETRI_DIFFERENCE_MINUEND_PLACES=379, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=463, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=369, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5620, PETRI_PLACES=387, PETRI_TRANSITIONS=466} [2024-06-27 19:25:36,648 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 346 predicate places. [2024-06-27 19:25:36,648 INFO L495 AbstractCegarLoop]: Abstraction has has 387 places, 466 transitions, 5620 flow [2024-06-27 19:25:36,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:25:36,648 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:25:36,648 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:25:36,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-27 19:25:36,649 INFO L420 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:25:36,649 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:25:36,649 INFO L85 PathProgramCache]: Analyzing trace with hash -406605930, now seen corresponding path program 2 times [2024-06-27 19:25:36,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:25:36,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115516684] [2024-06-27 19:25:36,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:25:36,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:25:36,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:25:36,722 INFO 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 19:25:36,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:25:36,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115516684] [2024-06-27 19:25:36,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115516684] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:25:36,723 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:25:36,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:25:36,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896800745] [2024-06-27 19:25:36,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:25:36,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:25:36,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:25:36,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:25:36,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:25:36,790 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:25:36,790 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 387 places, 466 transitions, 5620 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:25:36,790 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:25:36,790 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:25:36,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:25:38,475 INFO L124 PetriNetUnfolderBase]: 4723/8011 cut-off events. [2024-06-27 19:25:38,475 INFO L125 PetriNetUnfolderBase]: For 831224/831227 co-relation queries the response was YES. [2024-06-27 19:25:38,562 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50427 conditions, 8011 events. 4723/8011 cut-off events. For 831224/831227 co-relation queries the response was YES. Maximal size of possible extension queue 518. Compared 57521 event pairs, 1261 based on Foata normal form. 8/8008 useless extension candidates. Maximal degree in co-relation 50245. Up to 6836 conditions per place. [2024-06-27 19:25:38,583 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 403 selfloop transitions, 93 changer transitions 0/503 dead transitions. [2024-06-27 19:25:38,584 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 394 places, 503 transitions, 6745 flow [2024-06-27 19:25:38,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:25:38,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:25:38,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-06-27 19:25:38,585 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.61875 [2024-06-27 19:25:38,585 INFO L175 Difference]: Start difference. First operand has 387 places, 466 transitions, 5620 flow. Second operand 8 states and 198 transitions. [2024-06-27 19:25:38,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 394 places, 503 transitions, 6745 flow [2024-06-27 19:25:42,392 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 391 places, 503 transitions, 6567 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-27 19:25:42,397 INFO L231 Difference]: Finished difference. Result has 392 places, 467 transitions, 5651 flow [2024-06-27 19:25:42,397 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5442, PETRI_DIFFERENCE_MINUEND_PLACES=384, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=466, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=373, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5651, PETRI_PLACES=392, PETRI_TRANSITIONS=467} [2024-06-27 19:25:42,397 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 351 predicate places. [2024-06-27 19:25:42,398 INFO L495 AbstractCegarLoop]: Abstraction has has 392 places, 467 transitions, 5651 flow [2024-06-27 19:25:42,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:25:42,398 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:25:42,398 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:25:42,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-27 19:25:42,398 INFO L420 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:25:42,398 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:25:42,398 INFO L85 PathProgramCache]: Analyzing trace with hash 423738160, now seen corresponding path program 2 times [2024-06-27 19:25:42,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:25:42,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101861710] [2024-06-27 19:25:42,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:25:42,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:25:42,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:25:42,455 INFO 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 19:25:42,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:25:42,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101861710] [2024-06-27 19:25:42,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101861710] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:25:42,455 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:25:42,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:25:42,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708048874] [2024-06-27 19:25:42,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:25:42,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:25:42,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:25:42,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:25:42,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:25:42,513 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:25:42,513 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 392 places, 467 transitions, 5651 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:25:42,513 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:25:42,513 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:25:42,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:25:44,263 INFO L124 PetriNetUnfolderBase]: 4825/8196 cut-off events. [2024-06-27 19:25:44,264 INFO L125 PetriNetUnfolderBase]: For 916470/916473 co-relation queries the response was YES. [2024-06-27 19:25:44,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52516 conditions, 8196 events. 4825/8196 cut-off events. For 916470/916473 co-relation queries the response was YES. Maximal size of possible extension queue 535. Compared 59147 event pairs, 1210 based on Foata normal form. 8/8196 useless extension candidates. Maximal degree in co-relation 52333. Up to 6161 conditions per place. [2024-06-27 19:25:44,381 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 403 selfloop transitions, 91 changer transitions 0/501 dead transitions. [2024-06-27 19:25:44,381 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 398 places, 501 transitions, 7261 flow [2024-06-27 19:25:44,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:25:44,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:25:44,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2024-06-27 19:25:44,382 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5928571428571429 [2024-06-27 19:25:44,383 INFO L175 Difference]: Start difference. First operand has 392 places, 467 transitions, 5651 flow. Second operand 7 states and 166 transitions. [2024-06-27 19:25:44,383 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 398 places, 501 transitions, 7261 flow [2024-06-27 19:25:49,153 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 391 places, 501 transitions, 7051 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-27 19:25:49,158 INFO L231 Difference]: Finished difference. Result has 393 places, 474 transitions, 5748 flow [2024-06-27 19:25:49,159 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5451, PETRI_DIFFERENCE_MINUEND_PLACES=385, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=467, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=381, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5748, PETRI_PLACES=393, PETRI_TRANSITIONS=474} [2024-06-27 19:25:49,160 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 352 predicate places. [2024-06-27 19:25:49,160 INFO L495 AbstractCegarLoop]: Abstraction has has 393 places, 474 transitions, 5748 flow [2024-06-27 19:25:49,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:25:49,160 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:25:49,161 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:25:49,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-27 19:25:49,161 INFO L420 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:25:49,161 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:25:49,161 INFO L85 PathProgramCache]: Analyzing trace with hash -1730347288, now seen corresponding path program 3 times [2024-06-27 19:25:49,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:25:49,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842531175] [2024-06-27 19:25:49,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:25:49,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:25:49,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:25:49,230 INFO 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 19:25:49,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:25:49,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842531175] [2024-06-27 19:25:49,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842531175] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:25:49,231 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:25:49,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:25:49,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215249623] [2024-06-27 19:25:49,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:25:49,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:25:49,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:25:49,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:25:49,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:25:49,277 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:25:49,277 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 393 places, 474 transitions, 5748 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:25:49,277 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:25:49,277 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:25:49,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:25:51,024 INFO L124 PetriNetUnfolderBase]: 4878/8272 cut-off events. [2024-06-27 19:25:51,024 INFO L125 PetriNetUnfolderBase]: For 972479/972482 co-relation queries the response was YES. [2024-06-27 19:25:51,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53997 conditions, 8272 events. 4878/8272 cut-off events. For 972479/972482 co-relation queries the response was YES. Maximal size of possible extension queue 547. Compared 59776 event pairs, 1292 based on Foata normal form. 8/8269 useless extension candidates. Maximal degree in co-relation 53813. Up to 7004 conditions per place. [2024-06-27 19:25:51,137 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 409 selfloop transitions, 95 changer transitions 0/511 dead transitions. [2024-06-27 19:25:51,138 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 401 places, 511 transitions, 7127 flow [2024-06-27 19:25:51,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:25:51,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:25:51,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 211 transitions. [2024-06-27 19:25:51,138 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5861111111111111 [2024-06-27 19:25:51,138 INFO L175 Difference]: Start difference. First operand has 393 places, 474 transitions, 5748 flow. Second operand 9 states and 211 transitions. [2024-06-27 19:25:51,139 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 401 places, 511 transitions, 7127 flow [2024-06-27 19:25:55,727 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 399 places, 511 transitions, 6992 flow, removed 15 selfloop flow, removed 2 redundant places. [2024-06-27 19:25:55,732 INFO L231 Difference]: Finished difference. Result has 401 places, 476 transitions, 5861 flow [2024-06-27 19:25:55,733 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5613, PETRI_DIFFERENCE_MINUEND_PLACES=391, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=474, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=379, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5861, PETRI_PLACES=401, PETRI_TRANSITIONS=476} [2024-06-27 19:25:55,733 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 360 predicate places. [2024-06-27 19:25:55,733 INFO L495 AbstractCegarLoop]: Abstraction has has 401 places, 476 transitions, 5861 flow [2024-06-27 19:25:55,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:25:55,733 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:25:55,733 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:25:55,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-27 19:25:55,734 INFO L420 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:25:55,734 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:25:55,734 INFO L85 PathProgramCache]: Analyzing trace with hash -1158322054, now seen corresponding path program 3 times [2024-06-27 19:25:55,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:25:55,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674012517] [2024-06-27 19:25:55,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:25:55,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:25:55,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:25:55,803 INFO 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 19:25:55,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:25:55,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674012517] [2024-06-27 19:25:55,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674012517] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:25:55,803 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:25:55,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:25:55,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773810386] [2024-06-27 19:25:55,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:25:55,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:25:55,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:25:55,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:25:55,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:25:55,839 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:25:55,840 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 401 places, 476 transitions, 5861 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:25:55,840 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:25:55,840 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:25:55,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:25:57,505 INFO L124 PetriNetUnfolderBase]: 4865/8272 cut-off events. [2024-06-27 19:25:57,505 INFO L125 PetriNetUnfolderBase]: For 953465/953468 co-relation queries the response was YES. [2024-06-27 19:25:57,597 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53315 conditions, 8272 events. 4865/8272 cut-off events. For 953465/953468 co-relation queries the response was YES. Maximal size of possible extension queue 545. Compared 59788 event pairs, 1202 based on Foata normal form. 8/8272 useless extension candidates. Maximal degree in co-relation 53129. Up to 6238 conditions per place. [2024-06-27 19:25:57,863 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 409 selfloop transitions, 89 changer transitions 0/505 dead transitions. [2024-06-27 19:25:57,864 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 407 places, 505 transitions, 7391 flow [2024-06-27 19:25:57,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:25:57,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:25:57,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-27 19:25:57,865 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-27 19:25:57,865 INFO L175 Difference]: Start difference. First operand has 401 places, 476 transitions, 5861 flow. Second operand 7 states and 168 transitions. [2024-06-27 19:25:57,865 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 407 places, 505 transitions, 7391 flow