./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe008_tso.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2024-06-19_11-23-25.files/protection/safe008_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/safe008_tso.i ./goblint.2024-06-19_11-23-25.files/protection/safe008_tso.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-27 17:50:16,126 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 17:50:16,190 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 17:50:16,195 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 17:50:16,196 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 17:50:16,220 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 17:50:16,221 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 17:50:16,221 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 17:50:16,221 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 17:50:16,225 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 17:50:16,225 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 17:50:16,225 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 17:50:16,226 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 17:50:16,227 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 17:50:16,227 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 17:50:16,227 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 17:50:16,228 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 17:50:16,228 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 17:50:16,228 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 17:50:16,228 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 17:50:16,229 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 17:50:16,229 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 17:50:16,229 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 17:50:16,229 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 17:50:16,230 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 17:50:16,230 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 17:50:16,230 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 17:50:16,230 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 17:50:16,231 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 17:50:16,231 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 17:50:16,232 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 17:50:16,232 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 17:50:16,232 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 17:50:16,232 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 17:50:16,233 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 17:50:16,233 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 17:50:16,233 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 17:50:16,233 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 17:50:16,233 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 17:50:16,233 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 17:50:16,234 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 17:50:16,234 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 17:50:16,234 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 17:50:16,234 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-06-27 17:50:16,434 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 17:50:16,457 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 17:50:16,459 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 17:50:16,460 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 17:50:16,460 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 17:50:16,461 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe008_tso.i [2024-06-27 17:50:17,508 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 17:50:17,729 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 17:50:17,731 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe008_tso.i [2024-06-27 17:50:17,745 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/101257931/4cd4a35692254cf2860797fa8ab4244c/FLAGbb9dcae02 [2024-06-27 17:50:17,761 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/101257931/4cd4a35692254cf2860797fa8ab4244c [2024-06-27 17:50:17,763 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 17:50:17,764 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 17:50:17,766 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/safe008_tso.yml/witness.yml [2024-06-27 17:50:17,878 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 17:50:17,880 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 17:50:17,881 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 17:50:17,881 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 17:50:17,885 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 17:50:17,885 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 05:50:17" (1/2) ... [2024-06-27 17:50:17,886 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5beaf339 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:50:17, skipping insertion in model container [2024-06-27 17:50:17,886 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 05:50:17" (1/2) ... [2024-06-27 17:50:17,888 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@226122b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:50:17, skipping insertion in model container [2024-06-27 17:50:17,888 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 05:50:17" (2/2) ... [2024-06-27 17:50:17,888 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5beaf339 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 05:50:17, skipping insertion in model container [2024-06-27 17:50:17,888 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 05:50:17" (2/2) ... [2024-06-27 17:50:17,889 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 17:50:17,928 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 17:50:17,929 INFO L97 edCorrectnessWitness]: Location invariant before [L784-L784] (((((! multithreaded || ((z == 0 || z == 1) || z == 2)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (x == 0 || x == 1)) [2024-06-27 17:50:17,929 INFO L97 edCorrectnessWitness]: Location invariant before [L781-L781] (((((! multithreaded || ((z == 0 || z == 1) || z == 2)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (x == 0 || x == 1)) [2024-06-27 17:50:17,929 INFO L97 edCorrectnessWitness]: Location invariant before [L783-L783] (((((! multithreaded || ((z == 0 || z == 1) || z == 2)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (x == 0 || x == 1)) [2024-06-27 17:50:17,929 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 17:50:17,930 INFO L106 edCorrectnessWitness]: ghost_update [L779-L779] multithreaded = 1; [2024-06-27 17:50:17,981 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 17:50:18,136 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe008_tso.i[945,958] [2024-06-27 17:50:18,284 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 17:50:18,294 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local [2024-06-27 17:50:18,323 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe008_tso.i[945,958] Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-27 17:50:18,382 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 17:50:18,412 INFO L206 MainTranslator]: Completed translation [2024-06-27 17:50:18,412 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 05:50:18 WrapperNode [2024-06-27 17:50:18,413 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 17:50:18,414 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 17:50:18,414 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 17:50:18,414 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 17:50:18,419 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 05:50:18" (1/1) ... [2024-06-27 17:50:18,446 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 05:50:18" (1/1) ... [2024-06-27 17:50:18,474 INFO L138 Inliner]: procedures = 175, calls = 41, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 64 [2024-06-27 17:50:18,474 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 17:50:18,475 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 17:50:18,475 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 17:50:18,475 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 17:50:18,484 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 05:50:18" (1/1) ... [2024-06-27 17:50:18,484 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 05:50:18" (1/1) ... [2024-06-27 17:50:18,488 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 05:50:18" (1/1) ... [2024-06-27 17:50:18,503 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-27 17:50:18,504 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 05:50:18" (1/1) ... [2024-06-27 17:50:18,504 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 05:50:18" (1/1) ... [2024-06-27 17:50:18,515 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 05:50:18" (1/1) ... [2024-06-27 17:50:18,517 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 05:50:18" (1/1) ... [2024-06-27 17:50:18,520 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 05:50:18" (1/1) ... [2024-06-27 17:50:18,521 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 05:50:18" (1/1) ... [2024-06-27 17:50:18,524 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 17:50:18,527 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 17:50:18,527 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 17:50:18,527 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 17:50:18,528 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 05:50:18" (1/1) ... [2024-06-27 17:50:18,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 17:50:18,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:50:18,565 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-27 17:50:18,583 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-27 17:50:18,594 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 17:50:18,594 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 17:50:18,594 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-27 17:50:18,595 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-27 17:50:18,595 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-27 17:50:18,595 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-27 17:50:18,595 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-27 17:50:18,595 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-27 17:50:18,595 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 17:50:18,595 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 17:50:18,596 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 17:50:18,596 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 17:50:18,597 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-27 17:50:18,712 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 17:50:18,715 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 17:50:18,832 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 17:50:18,832 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 17:50:18,886 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 17:50:18,886 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-27 17:50:18,886 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 05:50:18 BoogieIcfgContainer [2024-06-27 17:50:18,887 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 17:50:18,888 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 17:50:18,888 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 17:50:18,890 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 17:50:18,891 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 05:50:17" (1/4) ... [2024-06-27 17:50:18,891 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@211b2605 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 05:50:18, skipping insertion in model container [2024-06-27 17:50:18,891 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 05:50:17" (2/4) ... [2024-06-27 17:50:18,891 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@211b2605 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 05:50:18, skipping insertion in model container [2024-06-27 17:50:18,892 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 05:50:18" (3/4) ... [2024-06-27 17:50:18,892 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@211b2605 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 05:50:18, skipping insertion in model container [2024-06-27 17:50:18,892 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 05:50:18" (4/4) ... [2024-06-27 17:50:18,893 INFO L112 eAbstractionObserver]: Analyzing ICFG safe008_tso.i [2024-06-27 17:50:18,905 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 17:50:18,906 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-27 17:50:18,906 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 17:50:18,938 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 17:50:18,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 54 places, 45 transitions, 102 flow [2024-06-27 17:50:18,983 INFO L124 PetriNetUnfolderBase]: 1/42 cut-off events. [2024-06-27 17:50:18,983 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 17:50:18,986 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52 conditions, 42 events. 1/42 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 66 event pairs, 0 based on Foata normal form. 0/37 useless extension candidates. Maximal degree in co-relation 43. Up to 2 conditions per place. [2024-06-27 17:50:18,986 INFO L82 GeneralOperation]: Start removeDead. Operand has 54 places, 45 transitions, 102 flow [2024-06-27 17:50:18,988 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 49 places, 39 transitions, 87 flow [2024-06-27 17:50:18,994 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 17:50:18,999 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;@620c41cf, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 17:50:18,999 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2024-06-27 17:50:19,002 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 17:50:19,002 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-27 17:50:19,002 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 17:50:19,002 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:19,003 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-27 17:50:19,003 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:50:19,007 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:19,007 INFO L85 PathProgramCache]: Analyzing trace with hash 210327718, now seen corresponding path program 1 times [2024-06-27 17:50:19,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:19,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728679673] [2024-06-27 17:50:19,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:19,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:19,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:19,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:19,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:19,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728679673] [2024-06-27 17:50:19,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728679673] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:19,395 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:19,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 17:50:19,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454078980] [2024-06-27 17:50:19,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:19,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 17:50:19,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:19,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 17:50:19,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 17:50:19,460 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 45 [2024-06-27 17:50:19,463 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 39 transitions, 87 flow. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:19,463 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:19,463 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 45 [2024-06-27 17:50:19,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:19,694 INFO L124 PetriNetUnfolderBase]: 975/1628 cut-off events. [2024-06-27 17:50:19,695 INFO L125 PetriNetUnfolderBase]: For 24/24 co-relation queries the response was YES. [2024-06-27 17:50:19,700 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3158 conditions, 1628 events. 975/1628 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 9188 event pairs, 719 based on Foata normal form. 1/1565 useless extension candidates. Maximal degree in co-relation 3146. Up to 1463 conditions per place. [2024-06-27 17:50:19,709 INFO L140 encePairwiseOnDemand]: 38/45 looper letters, 32 selfloop transitions, 4 changer transitions 0/51 dead transitions. [2024-06-27 17:50:19,709 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 51 transitions, 189 flow [2024-06-27 17:50:19,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 17:50:19,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 17:50:19,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 96 transitions. [2024-06-27 17:50:19,720 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7111111111111111 [2024-06-27 17:50:19,721 INFO L175 Difference]: Start difference. First operand has 49 places, 39 transitions, 87 flow. Second operand 3 states and 96 transitions. [2024-06-27 17:50:19,722 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 51 transitions, 189 flow [2024-06-27 17:50:19,725 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 51 transitions, 184 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-27 17:50:19,730 INFO L231 Difference]: Finished difference. Result has 49 places, 42 transitions, 114 flow [2024-06-27 17:50:19,731 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=114, PETRI_PLACES=49, PETRI_TRANSITIONS=42} [2024-06-27 17:50:19,735 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 0 predicate places. [2024-06-27 17:50:19,735 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 42 transitions, 114 flow [2024-06-27 17:50:19,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:19,736 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:19,736 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:19,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 17:50:19,737 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:50:19,739 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:19,739 INFO L85 PathProgramCache]: Analyzing trace with hash 262436515, now seen corresponding path program 1 times [2024-06-27 17:50:19,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:19,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269576146] [2024-06-27 17:50:19,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:19,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:19,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:19,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:19,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:19,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269576146] [2024-06-27 17:50:19,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269576146] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:19,885 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:19,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 17:50:19,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190851450] [2024-06-27 17:50:19,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:19,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 17:50:19,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:19,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 17:50:19,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-27 17:50:19,942 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 45 [2024-06-27 17:50:19,943 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 42 transitions, 114 flow. Second operand has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:19,944 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:19,944 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 45 [2024-06-27 17:50:19,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:20,101 INFO L124 PetriNetUnfolderBase]: 982/1625 cut-off events. [2024-06-27 17:50:20,101 INFO L125 PetriNetUnfolderBase]: For 270/277 co-relation queries the response was YES. [2024-06-27 17:50:20,104 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3600 conditions, 1625 events. 982/1625 cut-off events. For 270/277 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 8866 event pairs, 463 based on Foata normal form. 8/1628 useless extension candidates. Maximal degree in co-relation 3588. Up to 1429 conditions per place. [2024-06-27 17:50:20,111 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 43 selfloop transitions, 11 changer transitions 0/69 dead transitions. [2024-06-27 17:50:20,111 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 69 transitions, 294 flow [2024-06-27 17:50:20,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 17:50:20,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 17:50:20,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 131 transitions. [2024-06-27 17:50:20,115 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7277777777777777 [2024-06-27 17:50:20,116 INFO L175 Difference]: Start difference. First operand has 49 places, 42 transitions, 114 flow. Second operand 4 states and 131 transitions. [2024-06-27 17:50:20,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 69 transitions, 294 flow [2024-06-27 17:50:20,117 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 69 transitions, 290 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 17:50:20,119 INFO L231 Difference]: Finished difference. Result has 53 places, 50 transitions, 186 flow [2024-06-27 17:50:20,119 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=186, PETRI_PLACES=53, PETRI_TRANSITIONS=50} [2024-06-27 17:50:20,120 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 4 predicate places. [2024-06-27 17:50:20,120 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 50 transitions, 186 flow [2024-06-27 17:50:20,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:20,121 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:20,123 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:20,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 17:50:20,124 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:50:20,125 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:20,125 INFO L85 PathProgramCache]: Analyzing trace with hash -454402221, now seen corresponding path program 1 times [2024-06-27 17:50:20,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:20,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600208099] [2024-06-27 17:50:20,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:20,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:20,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:20,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:20,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:20,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600208099] [2024-06-27 17:50:20,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600208099] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:20,222 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:20,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 17:50:20,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391352127] [2024-06-27 17:50:20,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:20,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 17:50:20,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:20,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 17:50:20,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 17:50:20,254 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 17:50:20,255 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 50 transitions, 186 flow. Second operand has 5 states, 5 states have (on average 19.2) internal successors, (96), 5 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:20,255 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:20,256 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 17:50:20,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:20,458 INFO L124 PetriNetUnfolderBase]: 1263/2037 cut-off events. [2024-06-27 17:50:20,459 INFO L125 PetriNetUnfolderBase]: For 1223/1231 co-relation queries the response was YES. [2024-06-27 17:50:20,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5339 conditions, 2037 events. 1263/2037 cut-off events. For 1223/1231 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 11132 event pairs, 414 based on Foata normal form. 10/2039 useless extension candidates. Maximal degree in co-relation 5324. Up to 1793 conditions per place. [2024-06-27 17:50:20,470 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 65 selfloop transitions, 15 changer transitions 0/94 dead transitions. [2024-06-27 17:50:20,470 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 94 transitions, 490 flow [2024-06-27 17:50:20,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:50:20,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:50:20,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 160 transitions. [2024-06-27 17:50:20,474 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7111111111111111 [2024-06-27 17:50:20,474 INFO L175 Difference]: Start difference. First operand has 53 places, 50 transitions, 186 flow. Second operand 5 states and 160 transitions. [2024-06-27 17:50:20,474 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 94 transitions, 490 flow [2024-06-27 17:50:20,479 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 94 transitions, 484 flow, removed 3 selfloop flow, removed 0 redundant places. [2024-06-27 17:50:20,481 INFO L231 Difference]: Finished difference. Result has 60 places, 64 transitions, 319 flow [2024-06-27 17:50:20,481 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=319, PETRI_PLACES=60, PETRI_TRANSITIONS=64} [2024-06-27 17:50:20,482 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 11 predicate places. [2024-06-27 17:50:20,482 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 64 transitions, 319 flow [2024-06-27 17:50:20,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.2) internal successors, (96), 5 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:20,483 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:20,483 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:20,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 17:50:20,483 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:50:20,484 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:20,484 INFO L85 PathProgramCache]: Analyzing trace with hash -1166911888, now seen corresponding path program 1 times [2024-06-27 17:50:20,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:20,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170564603] [2024-06-27 17:50:20,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:20,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:20,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:20,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:20,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:20,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170564603] [2024-06-27 17:50:20,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170564603] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:20,650 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:20,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:50:20,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042456626] [2024-06-27 17:50:20,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:20,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:50:20,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:20,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:50:20,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:50:20,696 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 17:50:20,697 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 64 transitions, 319 flow. Second operand has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:20,697 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:20,697 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 17:50:20,697 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:20,952 INFO L124 PetriNetUnfolderBase]: 1328/2280 cut-off events. [2024-06-27 17:50:20,952 INFO L125 PetriNetUnfolderBase]: For 2422/2435 co-relation queries the response was YES. [2024-06-27 17:50:20,956 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6510 conditions, 2280 events. 1328/2280 cut-off events. For 2422/2435 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 13321 event pairs, 436 based on Foata normal form. 23/2280 useless extension candidates. Maximal degree in co-relation 6490. Up to 1770 conditions per place. [2024-06-27 17:50:20,964 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 74 selfloop transitions, 17 changer transitions 0/105 dead transitions. [2024-06-27 17:50:20,964 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 105 transitions, 616 flow [2024-06-27 17:50:20,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:50:20,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:50:20,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 189 transitions. [2024-06-27 17:50:20,965 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7 [2024-06-27 17:50:20,965 INFO L175 Difference]: Start difference. First operand has 60 places, 64 transitions, 319 flow. Second operand 6 states and 189 transitions. [2024-06-27 17:50:20,965 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 105 transitions, 616 flow [2024-06-27 17:50:20,970 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 105 transitions, 610 flow, removed 3 selfloop flow, removed 0 redundant places. [2024-06-27 17:50:20,972 INFO L231 Difference]: Finished difference. Result has 65 places, 65 transitions, 363 flow [2024-06-27 17:50:20,972 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=305, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=363, PETRI_PLACES=65, PETRI_TRANSITIONS=65} [2024-06-27 17:50:20,973 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 16 predicate places. [2024-06-27 17:50:20,973 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 65 transitions, 363 flow [2024-06-27 17:50:20,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:20,974 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:20,974 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:20,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 17:50:20,974 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:50:20,975 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:20,975 INFO L85 PathProgramCache]: Analyzing trace with hash -576324553, now seen corresponding path program 1 times [2024-06-27 17:50:20,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:20,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457565828] [2024-06-27 17:50:20,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:20,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:20,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:21,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:21,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:21,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457565828] [2024-06-27 17:50:21,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457565828] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:21,117 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:21,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 17:50:21,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532496173] [2024-06-27 17:50:21,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:21,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 17:50:21,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:21,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 17:50:21,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 17:50:21,139 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:50:21,140 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 65 transitions, 363 flow. Second operand has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 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 17:50:21,140 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:21,140 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:50:21,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:21,370 INFO L124 PetriNetUnfolderBase]: 1603/2561 cut-off events. [2024-06-27 17:50:21,370 INFO L125 PetriNetUnfolderBase]: For 3691/3691 co-relation queries the response was YES. [2024-06-27 17:50:21,375 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8005 conditions, 2561 events. 1603/2561 cut-off events. For 3691/3691 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 14614 event pairs, 528 based on Foata normal form. 2/2558 useless extension candidates. Maximal degree in co-relation 7982. Up to 2340 conditions per place. [2024-06-27 17:50:21,386 INFO L140 encePairwiseOnDemand]: 38/45 looper letters, 67 selfloop transitions, 8 changer transitions 0/88 dead transitions. [2024-06-27 17:50:21,386 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 88 transitions, 599 flow [2024-06-27 17:50:21,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 17:50:21,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 17:50:21,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 117 transitions. [2024-06-27 17:50:21,387 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.65 [2024-06-27 17:50:21,387 INFO L175 Difference]: Start difference. First operand has 65 places, 65 transitions, 363 flow. Second operand 4 states and 117 transitions. [2024-06-27 17:50:21,388 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 88 transitions, 599 flow [2024-06-27 17:50:21,392 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 88 transitions, 559 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-27 17:50:21,393 INFO L231 Difference]: Finished difference. Result has 66 places, 72 transitions, 409 flow [2024-06-27 17:50:21,393 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=327, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=409, PETRI_PLACES=66, PETRI_TRANSITIONS=72} [2024-06-27 17:50:21,394 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 17 predicate places. [2024-06-27 17:50:21,394 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 72 transitions, 409 flow [2024-06-27 17:50:21,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 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 17:50:21,394 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:21,395 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:21,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 17:50:21,395 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:50:21,395 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:21,396 INFO L85 PathProgramCache]: Analyzing trace with hash -1319833420, now seen corresponding path program 1 times [2024-06-27 17:50:21,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:21,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139816682] [2024-06-27 17:50:21,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:21,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:21,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:21,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:21,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:21,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139816682] [2024-06-27 17:50:21,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139816682] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:21,517 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:21,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:50:21,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463473759] [2024-06-27 17:50:21,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:21,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:50:21,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:21,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:50:21,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:50:21,557 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 17:50:21,557 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 72 transitions, 409 flow. Second operand has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:21,557 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:21,557 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 17:50:21,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:21,755 INFO L124 PetriNetUnfolderBase]: 1574/2539 cut-off events. [2024-06-27 17:50:21,756 INFO L125 PetriNetUnfolderBase]: For 5150/5206 co-relation queries the response was YES. [2024-06-27 17:50:21,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8495 conditions, 2539 events. 1574/2539 cut-off events. For 5150/5206 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 14634 event pairs, 391 based on Foata normal form. 23/2541 useless extension candidates. Maximal degree in co-relation 8470. Up to 2067 conditions per place. [2024-06-27 17:50:21,772 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 67 selfloop transitions, 36 changer transitions 0/119 dead transitions. [2024-06-27 17:50:21,773 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 119 transitions, 799 flow [2024-06-27 17:50:21,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:50:21,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:50:21,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 191 transitions. [2024-06-27 17:50:21,774 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7074074074074074 [2024-06-27 17:50:21,774 INFO L175 Difference]: Start difference. First operand has 66 places, 72 transitions, 409 flow. Second operand 6 states and 191 transitions. [2024-06-27 17:50:21,774 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 119 transitions, 799 flow [2024-06-27 17:50:21,780 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 119 transitions, 795 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-06-27 17:50:21,782 INFO L231 Difference]: Finished difference. Result has 72 places, 83 transitions, 562 flow [2024-06-27 17:50:21,782 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=405, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=562, PETRI_PLACES=72, PETRI_TRANSITIONS=83} [2024-06-27 17:50:21,782 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 23 predicate places. [2024-06-27 17:50:21,782 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 83 transitions, 562 flow [2024-06-27 17:50:21,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:21,783 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:21,783 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:21,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 17:50:21,783 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:50:21,784 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:21,784 INFO L85 PathProgramCache]: Analyzing trace with hash 25554040, now seen corresponding path program 1 times [2024-06-27 17:50:21,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:21,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350575378] [2024-06-27 17:50:21,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:21,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:21,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:21,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:21,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:21,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350575378] [2024-06-27 17:50:21,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350575378] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:21,873 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:21,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:50:21,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799773744] [2024-06-27 17:50:21,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:21,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:50:21,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:21,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:50:21,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:50:21,895 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:50:21,896 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 83 transitions, 562 flow. Second operand has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 6 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 17:50:21,896 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:21,896 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:50:21,896 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:22,109 INFO L124 PetriNetUnfolderBase]: 1692/2737 cut-off events. [2024-06-27 17:50:22,109 INFO L125 PetriNetUnfolderBase]: For 6762/6765 co-relation queries the response was YES. [2024-06-27 17:50:22,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9703 conditions, 2737 events. 1692/2737 cut-off events. For 6762/6765 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 15842 event pairs, 543 based on Foata normal form. 2/2728 useless extension candidates. Maximal degree in co-relation 9675. Up to 2384 conditions per place. [2024-06-27 17:50:22,127 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 97 selfloop transitions, 19 changer transitions 0/129 dead transitions. [2024-06-27 17:50:22,127 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 129 transitions, 975 flow [2024-06-27 17:50:22,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:50:22,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:50:22,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 177 transitions. [2024-06-27 17:50:22,128 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6555555555555556 [2024-06-27 17:50:22,129 INFO L175 Difference]: Start difference. First operand has 72 places, 83 transitions, 562 flow. Second operand 6 states and 177 transitions. [2024-06-27 17:50:22,129 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 129 transitions, 975 flow [2024-06-27 17:50:22,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 129 transitions, 935 flow, removed 11 selfloop flow, removed 1 redundant places. [2024-06-27 17:50:22,137 INFO L231 Difference]: Finished difference. Result has 79 places, 95 transitions, 665 flow [2024-06-27 17:50:22,137 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=527, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=665, PETRI_PLACES=79, PETRI_TRANSITIONS=95} [2024-06-27 17:50:22,138 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 30 predicate places. [2024-06-27 17:50:22,138 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 95 transitions, 665 flow [2024-06-27 17:50:22,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 6 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 17:50:22,139 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:22,139 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:22,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 17:50:22,139 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:50:22,139 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:22,139 INFO L85 PathProgramCache]: Analyzing trace with hash 25553854, now seen corresponding path program 2 times [2024-06-27 17:50:22,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:22,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526265072] [2024-06-27 17:50:22,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:22,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:22,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:22,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:22,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:22,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526265072] [2024-06-27 17:50:22,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526265072] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:22,242 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:22,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:50:22,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823226929] [2024-06-27 17:50:22,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:22,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:50:22,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:22,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:50:22,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:50:22,271 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 17:50:22,272 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 95 transitions, 665 flow. Second operand has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:22,272 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:22,272 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 17:50:22,272 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:22,521 INFO L124 PetriNetUnfolderBase]: 1592/2582 cut-off events. [2024-06-27 17:50:22,521 INFO L125 PetriNetUnfolderBase]: For 8857/8981 co-relation queries the response was YES. [2024-06-27 17:50:22,529 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9998 conditions, 2582 events. 1592/2582 cut-off events. For 8857/8981 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 15048 event pairs, 388 based on Foata normal form. 11/2520 useless extension candidates. Maximal degree in co-relation 9965. Up to 2155 conditions per place. [2024-06-27 17:50:22,539 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 82 selfloop transitions, 34 changer transitions 0/135 dead transitions. [2024-06-27 17:50:22,539 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 135 transitions, 1055 flow [2024-06-27 17:50:22,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:50:22,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:50:22,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 184 transitions. [2024-06-27 17:50:22,540 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6814814814814815 [2024-06-27 17:50:22,540 INFO L175 Difference]: Start difference. First operand has 79 places, 95 transitions, 665 flow. Second operand 6 states and 184 transitions. [2024-06-27 17:50:22,540 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 135 transitions, 1055 flow [2024-06-27 17:50:22,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 135 transitions, 1027 flow, removed 7 selfloop flow, removed 2 redundant places. [2024-06-27 17:50:22,551 INFO L231 Difference]: Finished difference. Result has 83 places, 103 transitions, 788 flow [2024-06-27 17:50:22,551 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=637, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=788, PETRI_PLACES=83, PETRI_TRANSITIONS=103} [2024-06-27 17:50:22,552 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 34 predicate places. [2024-06-27 17:50:22,552 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 103 transitions, 788 flow [2024-06-27 17:50:22,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:22,552 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:22,552 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:22,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-27 17:50:22,553 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:50:22,553 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:22,553 INFO L85 PathProgramCache]: Analyzing trace with hash -513389314, now seen corresponding path program 2 times [2024-06-27 17:50:22,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:22,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135810383] [2024-06-27 17:50:22,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:22,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:22,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:22,635 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:22,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:22,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135810383] [2024-06-27 17:50:22,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135810383] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:22,636 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:22,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:50:22,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060336518] [2024-06-27 17:50:22,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:22,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:50:22,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:22,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:50:22,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:50:22,665 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:50:22,665 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 103 transitions, 788 flow. Second operand has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 6 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 17:50:22,665 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:22,665 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:50:22,665 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:22,872 INFO L124 PetriNetUnfolderBase]: 1774/2958 cut-off events. [2024-06-27 17:50:22,872 INFO L125 PetriNetUnfolderBase]: For 10334/10346 co-relation queries the response was YES. [2024-06-27 17:50:22,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11186 conditions, 2958 events. 1774/2958 cut-off events. For 10334/10346 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 17845 event pairs, 750 based on Foata normal form. 10/2935 useless extension candidates. Maximal degree in co-relation 11152. Up to 2492 conditions per place. [2024-06-27 17:50:22,888 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 97 selfloop transitions, 22 changer transitions 0/132 dead transitions. [2024-06-27 17:50:22,888 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 132 transitions, 1151 flow [2024-06-27 17:50:22,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:50:22,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:50:22,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 147 transitions. [2024-06-27 17:50:22,889 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6533333333333333 [2024-06-27 17:50:22,889 INFO L175 Difference]: Start difference. First operand has 83 places, 103 transitions, 788 flow. Second operand 5 states and 147 transitions. [2024-06-27 17:50:22,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 132 transitions, 1151 flow [2024-06-27 17:50:22,900 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 132 transitions, 1067 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-27 17:50:22,901 INFO L231 Difference]: Finished difference. Result has 86 places, 108 transitions, 802 flow [2024-06-27 17:50:22,902 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=708, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=802, PETRI_PLACES=86, PETRI_TRANSITIONS=108} [2024-06-27 17:50:22,902 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 37 predicate places. [2024-06-27 17:50:22,902 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 108 transitions, 802 flow [2024-06-27 17:50:22,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 6 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 17:50:22,903 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:22,903 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:22,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-27 17:50:22,903 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:50:22,903 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:22,903 INFO L85 PathProgramCache]: Analyzing trace with hash -513395824, now seen corresponding path program 3 times [2024-06-27 17:50:22,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:22,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350416196] [2024-06-27 17:50:22,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:22,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:22,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:22,987 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:22,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:22,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350416196] [2024-06-27 17:50:22,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350416196] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:22,988 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:22,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:50:22,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304474623] [2024-06-27 17:50:22,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:22,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:50:22,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:22,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:50:22,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:50:23,021 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:50:23,021 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 108 transitions, 802 flow. Second operand has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 6 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 17:50:23,021 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:23,021 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:50:23,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:23,253 INFO L124 PetriNetUnfolderBase]: 1769/2975 cut-off events. [2024-06-27 17:50:23,254 INFO L125 PetriNetUnfolderBase]: For 10562/10565 co-relation queries the response was YES. [2024-06-27 17:50:23,261 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11215 conditions, 2975 events. 1769/2975 cut-off events. For 10562/10565 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 18087 event pairs, 737 based on Foata normal form. 2/2946 useless extension candidates. Maximal degree in co-relation 11179. Up to 2487 conditions per place. [2024-06-27 17:50:23,271 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 97 selfloop transitions, 23 changer transitions 0/133 dead transitions. [2024-06-27 17:50:23,271 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 133 transitions, 1105 flow [2024-06-27 17:50:23,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:50:23,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:50:23,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 149 transitions. [2024-06-27 17:50:23,272 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6622222222222223 [2024-06-27 17:50:23,272 INFO L175 Difference]: Start difference. First operand has 86 places, 108 transitions, 802 flow. Second operand 5 states and 149 transitions. [2024-06-27 17:50:23,272 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 133 transitions, 1105 flow [2024-06-27 17:50:23,284 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 133 transitions, 1079 flow, removed 4 selfloop flow, removed 1 redundant places. [2024-06-27 17:50:23,285 INFO L231 Difference]: Finished difference. Result has 90 places, 108 transitions, 834 flow [2024-06-27 17:50:23,285 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=776, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=834, PETRI_PLACES=90, PETRI_TRANSITIONS=108} [2024-06-27 17:50:23,286 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 41 predicate places. [2024-06-27 17:50:23,286 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 108 transitions, 834 flow [2024-06-27 17:50:23,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 6 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 17:50:23,286 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:23,286 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:23,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-27 17:50:23,287 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:50:23,287 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:23,287 INFO L85 PathProgramCache]: Analyzing trace with hash -715168292, now seen corresponding path program 3 times [2024-06-27 17:50:23,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:23,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199232792] [2024-06-27 17:50:23,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:23,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:23,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:23,370 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:23,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:23,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199232792] [2024-06-27 17:50:23,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199232792] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:23,371 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:23,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:50:23,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009277708] [2024-06-27 17:50:23,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:23,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:50:23,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:23,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:50:23,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:50:23,406 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 17:50:23,407 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 108 transitions, 834 flow. Second operand has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:23,407 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:23,407 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 17:50:23,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:23,650 INFO L124 PetriNetUnfolderBase]: 1617/2627 cut-off events. [2024-06-27 17:50:23,651 INFO L125 PetriNetUnfolderBase]: For 11991/12107 co-relation queries the response was YES. [2024-06-27 17:50:23,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10646 conditions, 2627 events. 1617/2627 cut-off events. For 11991/12107 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 15317 event pairs, 387 based on Foata normal form. 31/2586 useless extension candidates. Maximal degree in co-relation 10608. Up to 2098 conditions per place. [2024-06-27 17:50:23,668 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 76 selfloop transitions, 47 changer transitions 0/144 dead transitions. [2024-06-27 17:50:23,668 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 144 transitions, 1223 flow [2024-06-27 17:50:23,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:50:23,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:50:23,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 186 transitions. [2024-06-27 17:50:23,669 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6888888888888889 [2024-06-27 17:50:23,670 INFO L175 Difference]: Start difference. First operand has 90 places, 108 transitions, 834 flow. Second operand 6 states and 186 transitions. [2024-06-27 17:50:23,670 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 144 transitions, 1223 flow [2024-06-27 17:50:23,682 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 144 transitions, 1166 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-27 17:50:23,684 INFO L231 Difference]: Finished difference. Result has 93 places, 112 transitions, 942 flow [2024-06-27 17:50:23,684 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=781, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=942, PETRI_PLACES=93, PETRI_TRANSITIONS=112} [2024-06-27 17:50:23,685 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 44 predicate places. [2024-06-27 17:50:23,685 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 112 transitions, 942 flow [2024-06-27 17:50:23,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:23,685 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:23,685 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:23,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-27 17:50:23,686 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:50:23,686 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:23,686 INFO L85 PathProgramCache]: Analyzing trace with hash -714922028, now seen corresponding path program 1 times [2024-06-27 17:50:23,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:23,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198753432] [2024-06-27 17:50:23,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:23,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:23,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:23,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:23,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:23,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198753432] [2024-06-27 17:50:23,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198753432] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:23,779 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:23,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:50:23,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646308517] [2024-06-27 17:50:23,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:23,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:50:23,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:23,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:50:23,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:50:23,809 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:50:23,809 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 112 transitions, 942 flow. Second operand has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 6 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 17:50:23,810 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:23,810 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:50:23,810 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:24,068 INFO L124 PetriNetUnfolderBase]: 1766/2861 cut-off events. [2024-06-27 17:50:24,069 INFO L125 PetriNetUnfolderBase]: For 12544/12547 co-relation queries the response was YES. [2024-06-27 17:50:24,079 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11570 conditions, 2861 events. 1766/2861 cut-off events. For 12544/12547 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 16681 event pairs, 721 based on Foata normal form. 6/2851 useless extension candidates. Maximal degree in co-relation 11531. Up to 2540 conditions per place. [2024-06-27 17:50:24,092 INFO L140 encePairwiseOnDemand]: 38/45 looper letters, 114 selfloop transitions, 10 changer transitions 0/137 dead transitions. [2024-06-27 17:50:24,093 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 137 transitions, 1261 flow [2024-06-27 17:50:24,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:50:24,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:50:24,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 143 transitions. [2024-06-27 17:50:24,094 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6355555555555555 [2024-06-27 17:50:24,094 INFO L175 Difference]: Start difference. First operand has 93 places, 112 transitions, 942 flow. Second operand 5 states and 143 transitions. [2024-06-27 17:50:24,094 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 137 transitions, 1261 flow [2024-06-27 17:50:24,113 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 137 transitions, 1167 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-27 17:50:24,115 INFO L231 Difference]: Finished difference. Result has 94 places, 114 transitions, 891 flow [2024-06-27 17:50:24,115 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=848, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=891, PETRI_PLACES=94, PETRI_TRANSITIONS=114} [2024-06-27 17:50:24,116 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 45 predicate places. [2024-06-27 17:50:24,116 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 114 transitions, 891 flow [2024-06-27 17:50:24,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 6 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 17:50:24,116 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:24,116 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:24,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-27 17:50:24,117 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:50:24,117 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:24,117 INFO L85 PathProgramCache]: Analyzing trace with hash 2038413262, now seen corresponding path program 1 times [2024-06-27 17:50:24,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:24,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430546408] [2024-06-27 17:50:24,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:24,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:24,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:24,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:24,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:24,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430546408] [2024-06-27 17:50:24,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430546408] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:24,212 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:24,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:50:24,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856213839] [2024-06-27 17:50:24,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:24,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:50:24,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:24,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:50:24,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:50:24,247 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:50:24,247 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 114 transitions, 891 flow. Second operand has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:24,247 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:24,247 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:50:24,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:24,537 INFO L124 PetriNetUnfolderBase]: 1783/2951 cut-off events. [2024-06-27 17:50:24,537 INFO L125 PetriNetUnfolderBase]: For 12217/12220 co-relation queries the response was YES. [2024-06-27 17:50:24,545 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11641 conditions, 2951 events. 1783/2951 cut-off events. For 12217/12220 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 17595 event pairs, 684 based on Foata normal form. 2/2924 useless extension candidates. Maximal degree in co-relation 11601. Up to 2392 conditions per place. [2024-06-27 17:50:24,555 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 124 selfloop transitions, 34 changer transitions 0/171 dead transitions. [2024-06-27 17:50:24,555 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 171 transitions, 1453 flow [2024-06-27 17:50:24,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:50:24,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:50:24,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 208 transitions. [2024-06-27 17:50:24,556 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6603174603174603 [2024-06-27 17:50:24,556 INFO L175 Difference]: Start difference. First operand has 94 places, 114 transitions, 891 flow. Second operand 7 states and 208 transitions. [2024-06-27 17:50:24,556 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 171 transitions, 1453 flow [2024-06-27 17:50:24,572 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 171 transitions, 1428 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-27 17:50:24,574 INFO L231 Difference]: Finished difference. Result has 100 places, 127 transitions, 1064 flow [2024-06-27 17:50:24,574 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=866, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1064, PETRI_PLACES=100, PETRI_TRANSITIONS=127} [2024-06-27 17:50:24,575 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 51 predicate places. [2024-06-27 17:50:24,575 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 127 transitions, 1064 flow [2024-06-27 17:50:24,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:24,575 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:24,575 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:24,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-27 17:50:24,576 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:50:24,576 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:24,576 INFO L85 PathProgramCache]: Analyzing trace with hash 792176456, now seen corresponding path program 2 times [2024-06-27 17:50:24,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:24,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305564848] [2024-06-27 17:50:24,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:24,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:24,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:24,670 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 17:50:24,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:24,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305564848] [2024-06-27 17:50:24,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305564848] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:24,671 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:24,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:50:24,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369371892] [2024-06-27 17:50:24,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:24,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:50:24,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:24,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:50:24,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:50:24,704 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:50:24,705 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 127 transitions, 1064 flow. Second operand has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:24,705 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:24,705 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:50:24,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:25,011 INFO L124 PetriNetUnfolderBase]: 1822/3055 cut-off events. [2024-06-27 17:50:25,012 INFO L125 PetriNetUnfolderBase]: For 14721/14724 co-relation queries the response was YES. [2024-06-27 17:50:25,055 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12682 conditions, 3055 events. 1822/3055 cut-off events. For 14721/14724 co-relation queries the response was YES. Maximal size of possible extension queue 180. Compared 18053 event pairs, 536 based on Foata normal form. 2/3047 useless extension candidates. Maximal degree in co-relation 12639. Up to 2520 conditions per place. [2024-06-27 17:50:25,067 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 141 selfloop transitions, 32 changer transitions 0/186 dead transitions. [2024-06-27 17:50:25,067 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 186 transitions, 1649 flow [2024-06-27 17:50:25,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 17:50:25,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 17:50:25,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 255 transitions. [2024-06-27 17:50:25,069 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6296296296296297 [2024-06-27 17:50:25,069 INFO L175 Difference]: Start difference. First operand has 100 places, 127 transitions, 1064 flow. Second operand 9 states and 255 transitions. [2024-06-27 17:50:25,069 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 186 transitions, 1649 flow [2024-06-27 17:50:25,100 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 186 transitions, 1595 flow, removed 15 selfloop flow, removed 2 redundant places. [2024-06-27 17:50:25,102 INFO L231 Difference]: Finished difference. Result has 108 places, 135 transitions, 1164 flow [2024-06-27 17:50:25,103 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1020, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1164, PETRI_PLACES=108, PETRI_TRANSITIONS=135} [2024-06-27 17:50:25,103 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 59 predicate places. [2024-06-27 17:50:25,103 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 135 transitions, 1164 flow [2024-06-27 17:50:25,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:25,104 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:25,104 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:25,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-27 17:50:25,104 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:50:25,104 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:25,105 INFO L85 PathProgramCache]: Analyzing trace with hash 792170876, now seen corresponding path program 3 times [2024-06-27 17:50:25,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:25,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347589796] [2024-06-27 17:50:25,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:25,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:25,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:25,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:25,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:25,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347589796] [2024-06-27 17:50:25,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347589796] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:25,205 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:25,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:50:25,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51968374] [2024-06-27 17:50:25,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:25,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:50:25,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:25,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:50:25,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:50:25,250 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:50:25,251 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 135 transitions, 1164 flow. Second operand has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:25,251 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:25,251 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:50:25,251 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:25,542 INFO L124 PetriNetUnfolderBase]: 1817/3005 cut-off events. [2024-06-27 17:50:25,542 INFO L125 PetriNetUnfolderBase]: For 15835/15838 co-relation queries the response was YES. [2024-06-27 17:50:25,552 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12866 conditions, 3005 events. 1817/3005 cut-off events. For 15835/15838 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 17977 event pairs, 694 based on Foata normal form. 2/2980 useless extension candidates. Maximal degree in co-relation 12820. Up to 2515 conditions per place. [2024-06-27 17:50:25,565 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 128 selfloop transitions, 31 changer transitions 0/172 dead transitions. [2024-06-27 17:50:25,565 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 172 transitions, 1575 flow [2024-06-27 17:50:25,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:50:25,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:50:25,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 203 transitions. [2024-06-27 17:50:25,566 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6444444444444445 [2024-06-27 17:50:25,566 INFO L175 Difference]: Start difference. First operand has 108 places, 135 transitions, 1164 flow. Second operand 7 states and 203 transitions. [2024-06-27 17:50:25,566 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 172 transitions, 1575 flow [2024-06-27 17:50:25,592 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 172 transitions, 1529 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-27 17:50:25,594 INFO L231 Difference]: Finished difference. Result has 111 places, 135 transitions, 1188 flow [2024-06-27 17:50:25,594 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1118, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1188, PETRI_PLACES=111, PETRI_TRANSITIONS=135} [2024-06-27 17:50:25,594 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 62 predicate places. [2024-06-27 17:50:25,595 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 135 transitions, 1188 flow [2024-06-27 17:50:25,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:25,595 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:25,595 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:25,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-27 17:50:25,595 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:50:25,596 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:25,596 INFO L85 PathProgramCache]: Analyzing trace with hash -695373590, now seen corresponding path program 4 times [2024-06-27 17:50:25,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:25,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119655526] [2024-06-27 17:50:25,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:25,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:25,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:25,684 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:25,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:25,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119655526] [2024-06-27 17:50:25,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119655526] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:25,685 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:25,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:50:25,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557539138] [2024-06-27 17:50:25,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:25,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:50:25,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:25,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:50:25,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:50:25,720 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:50:25,721 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 135 transitions, 1188 flow. Second operand has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:25,721 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:25,721 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:50:25,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:26,027 INFO L124 PetriNetUnfolderBase]: 1856/2986 cut-off events. [2024-06-27 17:50:26,027 INFO L125 PetriNetUnfolderBase]: For 17317/17320 co-relation queries the response was YES. [2024-06-27 17:50:26,037 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13353 conditions, 2986 events. 1856/2986 cut-off events. For 17317/17320 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 17266 event pairs, 440 based on Foata normal form. 2/2982 useless extension candidates. Maximal degree in co-relation 13305. Up to 2495 conditions per place. [2024-06-27 17:50:26,049 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 134 selfloop transitions, 45 changer transitions 0/192 dead transitions. [2024-06-27 17:50:26,049 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 192 transitions, 1838 flow [2024-06-27 17:50:26,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:50:26,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:50:26,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 236 transitions. [2024-06-27 17:50:26,051 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6555555555555556 [2024-06-27 17:50:26,051 INFO L175 Difference]: Start difference. First operand has 111 places, 135 transitions, 1188 flow. Second operand 8 states and 236 transitions. [2024-06-27 17:50:26,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 192 transitions, 1838 flow [2024-06-27 17:50:26,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 192 transitions, 1776 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-27 17:50:26,078 INFO L231 Difference]: Finished difference. Result has 114 places, 142 transitions, 1309 flow [2024-06-27 17:50:26,078 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1126, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1309, PETRI_PLACES=114, PETRI_TRANSITIONS=142} [2024-06-27 17:50:26,078 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 65 predicate places. [2024-06-27 17:50:26,078 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 142 transitions, 1309 flow [2024-06-27 17:50:26,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:26,079 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:26,079 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:26,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-27 17:50:26,079 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:50:26,079 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:26,080 INFO L85 PathProgramCache]: Analyzing trace with hash 1264594276, now seen corresponding path program 5 times [2024-06-27 17:50:26,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:26,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056908047] [2024-06-27 17:50:26,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:26,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:26,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:26,167 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:26,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:26,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056908047] [2024-06-27 17:50:26,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056908047] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:26,168 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:26,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:50:26,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651320949] [2024-06-27 17:50:26,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:26,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:50:26,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:26,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:50:26,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:50:26,202 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:50:26,203 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 142 transitions, 1309 flow. Second operand has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:26,203 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:26,203 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:50:26,203 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:26,498 INFO L124 PetriNetUnfolderBase]: 1851/3013 cut-off events. [2024-06-27 17:50:26,498 INFO L125 PetriNetUnfolderBase]: For 19621/19624 co-relation queries the response was YES. [2024-06-27 17:50:26,509 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13676 conditions, 3013 events. 1851/3013 cut-off events. For 19621/19624 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 17630 event pairs, 512 based on Foata normal form. 2/3002 useless extension candidates. Maximal degree in co-relation 13626. Up to 2490 conditions per place. [2024-06-27 17:50:26,521 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 122 selfloop transitions, 43 changer transitions 0/178 dead transitions. [2024-06-27 17:50:26,521 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 178 transitions, 1786 flow [2024-06-27 17:50:26,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:50:26,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:50:26,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 182 transitions. [2024-06-27 17:50:26,523 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.674074074074074 [2024-06-27 17:50:26,523 INFO L175 Difference]: Start difference. First operand has 114 places, 142 transitions, 1309 flow. Second operand 6 states and 182 transitions. [2024-06-27 17:50:26,523 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 178 transitions, 1786 flow [2024-06-27 17:50:26,558 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 178 transitions, 1672 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-27 17:50:26,560 INFO L231 Difference]: Finished difference. Result has 114 places, 142 transitions, 1297 flow [2024-06-27 17:50:26,561 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1199, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1297, PETRI_PLACES=114, PETRI_TRANSITIONS=142} [2024-06-27 17:50:26,561 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 65 predicate places. [2024-06-27 17:50:26,561 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 142 transitions, 1297 flow [2024-06-27 17:50:26,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:26,562 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:26,562 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:26,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-27 17:50:26,562 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:50:26,562 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:26,562 INFO L85 PathProgramCache]: Analyzing trace with hash 1264801666, now seen corresponding path program 6 times [2024-06-27 17:50:26,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:26,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621939145] [2024-06-27 17:50:26,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:26,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:26,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:26,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:26,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:26,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621939145] [2024-06-27 17:50:26,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621939145] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:26,645 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:26,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:50:26,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107797089] [2024-06-27 17:50:26,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:26,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:50:26,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:26,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:50:26,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:50:26,676 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:50:26,676 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 142 transitions, 1297 flow. Second operand has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:26,677 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:26,677 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:50:26,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:26,973 INFO L124 PetriNetUnfolderBase]: 1846/3076 cut-off events. [2024-06-27 17:50:26,973 INFO L125 PetriNetUnfolderBase]: For 19953/19968 co-relation queries the response was YES. [2024-06-27 17:50:26,984 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13640 conditions, 3076 events. 1846/3076 cut-off events. For 19953/19968 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 18594 event pairs, 701 based on Foata normal form. 12/3056 useless extension candidates. Maximal degree in co-relation 13590. Up to 2485 conditions per place. [2024-06-27 17:50:26,994 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 128 selfloop transitions, 45 changer transitions 0/186 dead transitions. [2024-06-27 17:50:26,994 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 186 transitions, 1762 flow [2024-06-27 17:50:26,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:50:26,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:50:26,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 227 transitions. [2024-06-27 17:50:26,995 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6305555555555555 [2024-06-27 17:50:26,996 INFO L175 Difference]: Start difference. First operand has 114 places, 142 transitions, 1297 flow. Second operand 8 states and 227 transitions. [2024-06-27 17:50:26,996 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 186 transitions, 1762 flow [2024-06-27 17:50:27,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 186 transitions, 1660 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-27 17:50:27,026 INFO L231 Difference]: Finished difference. Result has 116 places, 143 transitions, 1305 flow [2024-06-27 17:50:27,026 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1199, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1305, PETRI_PLACES=116, PETRI_TRANSITIONS=143} [2024-06-27 17:50:27,026 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 67 predicate places. [2024-06-27 17:50:27,026 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 143 transitions, 1305 flow [2024-06-27 17:50:27,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:27,027 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:27,027 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:27,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-27 17:50:27,027 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:50:27,027 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:27,028 INFO L85 PathProgramCache]: Analyzing trace with hash -337261788, now seen corresponding path program 1 times [2024-06-27 17:50:27,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:27,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913738310] [2024-06-27 17:50:27,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:27,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:27,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:27,120 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:27,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:27,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913738310] [2024-06-27 17:50:27,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913738310] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:27,121 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:27,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 17:50:27,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979243596] [2024-06-27 17:50:27,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:27,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 17:50:27,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:27,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 17:50:27,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 17:50:27,144 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 17:50:27,144 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 143 transitions, 1305 flow. Second operand has 5 states, 5 states have (on average 20.4) internal successors, (102), 5 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:27,144 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:27,144 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 17:50:27,144 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:27,427 INFO L124 PetriNetUnfolderBase]: 1712/2780 cut-off events. [2024-06-27 17:50:27,430 INFO L125 PetriNetUnfolderBase]: For 19627/19649 co-relation queries the response was YES. [2024-06-27 17:50:27,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12678 conditions, 2780 events. 1712/2780 cut-off events. For 19627/19649 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 16348 event pairs, 440 based on Foata normal form. 23/2769 useless extension candidates. Maximal degree in co-relation 12628. Up to 2328 conditions per place. [2024-06-27 17:50:27,463 INFO L140 encePairwiseOnDemand]: 38/45 looper letters, 108 selfloop transitions, 26 changer transitions 0/155 dead transitions. [2024-06-27 17:50:27,463 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 155 transitions, 1601 flow [2024-06-27 17:50:27,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 17:50:27,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 17:50:27,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 119 transitions. [2024-06-27 17:50:27,469 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6611111111111111 [2024-06-27 17:50:27,470 INFO L175 Difference]: Start difference. First operand has 116 places, 143 transitions, 1305 flow. Second operand 4 states and 119 transitions. [2024-06-27 17:50:27,470 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 155 transitions, 1601 flow [2024-06-27 17:50:27,523 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 155 transitions, 1501 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-27 17:50:27,525 INFO L231 Difference]: Finished difference. Result has 114 places, 143 transitions, 1269 flow [2024-06-27 17:50:27,525 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1205, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1269, PETRI_PLACES=114, PETRI_TRANSITIONS=143} [2024-06-27 17:50:27,526 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 65 predicate places. [2024-06-27 17:50:27,526 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 143 transitions, 1269 flow [2024-06-27 17:50:27,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.4) internal successors, (102), 5 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:27,526 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:27,526 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:27,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-27 17:50:27,527 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:50:27,527 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:27,527 INFO L85 PathProgramCache]: Analyzing trace with hash 1509517467, now seen corresponding path program 1 times [2024-06-27 17:50:27,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:27,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255793102] [2024-06-27 17:50:27,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:27,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:27,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:27,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:27,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:27,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255793102] [2024-06-27 17:50:27,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255793102] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:27,621 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:27,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:50:27,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038045990] [2024-06-27 17:50:27,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:27,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:50:27,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:27,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:50:27,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:50:27,658 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 17:50:27,659 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 143 transitions, 1269 flow. Second operand has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:27,659 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:27,659 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 17:50:27,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:28,028 INFO L124 PetriNetUnfolderBase]: 1894/3057 cut-off events. [2024-06-27 17:50:28,028 INFO L125 PetriNetUnfolderBase]: For 24879/24909 co-relation queries the response was YES. [2024-06-27 17:50:28,041 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14010 conditions, 3057 events. 1894/3057 cut-off events. For 24879/24909 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 18058 event pairs, 261 based on Foata normal form. 22/2991 useless extension candidates. Maximal degree in co-relation 13959. Up to 2000 conditions per place. [2024-06-27 17:50:28,052 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 102 selfloop transitions, 64 changer transitions 0/197 dead transitions. [2024-06-27 17:50:28,052 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 197 transitions, 1869 flow [2024-06-27 17:50:28,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:50:28,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:50:28,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 224 transitions. [2024-06-27 17:50:28,053 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7111111111111111 [2024-06-27 17:50:28,054 INFO L175 Difference]: Start difference. First operand has 114 places, 143 transitions, 1269 flow. Second operand 7 states and 224 transitions. [2024-06-27 17:50:28,054 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 197 transitions, 1869 flow [2024-06-27 17:50:28,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 197 transitions, 1805 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-27 17:50:28,088 INFO L231 Difference]: Finished difference. Result has 118 places, 147 transitions, 1384 flow [2024-06-27 17:50:28,088 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1205, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1384, PETRI_PLACES=118, PETRI_TRANSITIONS=147} [2024-06-27 17:50:28,089 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 69 predicate places. [2024-06-27 17:50:28,089 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 147 transitions, 1384 flow [2024-06-27 17:50:28,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:28,090 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:28,090 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:28,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-27 17:50:28,090 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:50:28,090 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:28,090 INFO L85 PathProgramCache]: Analyzing trace with hash -1344524365, now seen corresponding path program 2 times [2024-06-27 17:50:28,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:28,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041390151] [2024-06-27 17:50:28,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:28,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:28,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:28,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:28,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:28,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041390151] [2024-06-27 17:50:28,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041390151] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:28,200 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:28,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:50:28,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047546749] [2024-06-27 17:50:28,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:28,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:50:28,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:28,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:50:28,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:50:28,253 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 17:50:28,255 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 147 transitions, 1384 flow. Second operand has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:28,255 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:28,255 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 17:50:28,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:28,600 INFO L124 PetriNetUnfolderBase]: 1975/3175 cut-off events. [2024-06-27 17:50:28,600 INFO L125 PetriNetUnfolderBase]: For 29012/29055 co-relation queries the response was YES. [2024-06-27 17:50:28,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15199 conditions, 3175 events. 1975/3175 cut-off events. For 29012/29055 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 18847 event pairs, 415 based on Foata normal form. 18/3099 useless extension candidates. Maximal degree in co-relation 15148. Up to 2443 conditions per place. [2024-06-27 17:50:28,625 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 100 selfloop transitions, 62 changer transitions 0/193 dead transitions. [2024-06-27 17:50:28,625 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 193 transitions, 1880 flow [2024-06-27 17:50:28,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:50:28,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:50:28,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 219 transitions. [2024-06-27 17:50:28,627 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6952380952380952 [2024-06-27 17:50:28,627 INFO L175 Difference]: Start difference. First operand has 118 places, 147 transitions, 1384 flow. Second operand 7 states and 219 transitions. [2024-06-27 17:50:28,627 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 193 transitions, 1880 flow [2024-06-27 17:50:28,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 193 transitions, 1793 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-27 17:50:28,666 INFO L231 Difference]: Finished difference. Result has 122 places, 149 transitions, 1458 flow [2024-06-27 17:50:28,666 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1297, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1458, PETRI_PLACES=122, PETRI_TRANSITIONS=149} [2024-06-27 17:50:28,667 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 73 predicate places. [2024-06-27 17:50:28,667 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 149 transitions, 1458 flow [2024-06-27 17:50:28,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:28,667 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:28,668 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:28,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-27 17:50:28,668 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:50:28,668 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:28,669 INFO L85 PathProgramCache]: Analyzing trace with hash -1229233195, now seen corresponding path program 3 times [2024-06-27 17:50:28,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:28,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558403616] [2024-06-27 17:50:28,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:28,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:28,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:28,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:28,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:28,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558403616] [2024-06-27 17:50:28,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558403616] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:28,775 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:28,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:50:28,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546303167] [2024-06-27 17:50:28,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:28,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:50:28,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:28,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:50:28,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:50:28,828 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 17:50:28,829 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 149 transitions, 1458 flow. Second operand has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:28,829 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:28,829 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 17:50:28,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:29,168 INFO L124 PetriNetUnfolderBase]: 2091/3350 cut-off events. [2024-06-27 17:50:29,169 INFO L125 PetriNetUnfolderBase]: For 32900/32943 co-relation queries the response was YES. [2024-06-27 17:50:29,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16471 conditions, 3350 events. 2091/3350 cut-off events. For 32900/32943 co-relation queries the response was YES. Maximal size of possible extension queue 212. Compared 20101 event pairs, 411 based on Foata normal form. 18/3276 useless extension candidates. Maximal degree in co-relation 16418. Up to 2724 conditions per place. [2024-06-27 17:50:29,191 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 121 selfloop transitions, 39 changer transitions 0/191 dead transitions. [2024-06-27 17:50:29,192 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 191 transitions, 1912 flow [2024-06-27 17:50:29,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:50:29,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:50:29,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 213 transitions. [2024-06-27 17:50:29,193 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6761904761904762 [2024-06-27 17:50:29,193 INFO L175 Difference]: Start difference. First operand has 122 places, 149 transitions, 1458 flow. Second operand 7 states and 213 transitions. [2024-06-27 17:50:29,193 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 191 transitions, 1912 flow [2024-06-27 17:50:29,303 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 191 transitions, 1783 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-27 17:50:29,305 INFO L231 Difference]: Finished difference. Result has 124 places, 151 transitions, 1448 flow [2024-06-27 17:50:29,306 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1329, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1448, PETRI_PLACES=124, PETRI_TRANSITIONS=151} [2024-06-27 17:50:29,306 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 75 predicate places. [2024-06-27 17:50:29,306 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 151 transitions, 1448 flow [2024-06-27 17:50:29,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:29,306 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:29,306 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:29,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-27 17:50:29,307 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:50:29,307 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:29,307 INFO L85 PathProgramCache]: Analyzing trace with hash -1212325449, now seen corresponding path program 1 times [2024-06-27 17:50:29,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:29,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240720150] [2024-06-27 17:50:29,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:29,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:29,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:29,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:29,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:29,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240720150] [2024-06-27 17:50:29,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240720150] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:29,408 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:29,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:50:29,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282494313] [2024-06-27 17:50:29,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:29,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:50:29,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:29,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:50:29,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:50:29,440 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:50:29,441 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 151 transitions, 1448 flow. Second operand has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:29,441 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:29,441 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:50:29,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:29,790 INFO L124 PetriNetUnfolderBase]: 2246/3577 cut-off events. [2024-06-27 17:50:29,791 INFO L125 PetriNetUnfolderBase]: For 30764/30767 co-relation queries the response was YES. [2024-06-27 17:50:29,806 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17124 conditions, 3577 events. 2246/3577 cut-off events. For 30764/30767 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 21317 event pairs, 592 based on Foata normal form. 4/3565 useless extension candidates. Maximal degree in co-relation 17070. Up to 3166 conditions per place. [2024-06-27 17:50:29,818 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 153 selfloop transitions, 25 changer transitions 0/191 dead transitions. [2024-06-27 17:50:29,818 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 191 transitions, 1913 flow [2024-06-27 17:50:29,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:50:29,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:50:29,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 201 transitions. [2024-06-27 17:50:29,819 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.638095238095238 [2024-06-27 17:50:29,819 INFO L175 Difference]: Start difference. First operand has 124 places, 151 transitions, 1448 flow. Second operand 7 states and 201 transitions. [2024-06-27 17:50:29,819 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 191 transitions, 1913 flow [2024-06-27 17:50:29,864 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 191 transitions, 1826 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-27 17:50:29,869 INFO L231 Difference]: Finished difference. Result has 126 places, 153 transitions, 1436 flow [2024-06-27 17:50:29,869 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1361, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1436, PETRI_PLACES=126, PETRI_TRANSITIONS=153} [2024-06-27 17:50:29,870 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 77 predicate places. [2024-06-27 17:50:29,870 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 153 transitions, 1436 flow [2024-06-27 17:50:29,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:29,870 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:29,870 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:29,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-27 17:50:29,870 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:50:29,871 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:29,871 INFO L85 PathProgramCache]: Analyzing trace with hash -81921317, now seen corresponding path program 4 times [2024-06-27 17:50:29,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:29,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922917692] [2024-06-27 17:50:29,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:29,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:29,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:29,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:29,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:29,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922917692] [2024-06-27 17:50:29,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922917692] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:29,965 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:29,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:50:29,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890995334] [2024-06-27 17:50:29,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:29,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:50:29,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:29,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:50:29,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:50:30,006 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 17:50:30,007 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 153 transitions, 1436 flow. Second operand has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:30,007 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:30,007 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 17:50:30,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:30,371 INFO L124 PetriNetUnfolderBase]: 2083/3346 cut-off events. [2024-06-27 17:50:30,372 INFO L125 PetriNetUnfolderBase]: For 34281/34328 co-relation queries the response was YES. [2024-06-27 17:50:30,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16223 conditions, 3346 events. 2083/3346 cut-off events. For 34281/34328 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 20076 event pairs, 259 based on Foata normal form. 32/3290 useless extension candidates. Maximal degree in co-relation 16168. Up to 2402 conditions per place. [2024-06-27 17:50:30,397 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 103 selfloop transitions, 59 changer transitions 0/194 dead transitions. [2024-06-27 17:50:30,398 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 194 transitions, 1906 flow [2024-06-27 17:50:30,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:50:30,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:50:30,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 216 transitions. [2024-06-27 17:50:30,399 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6857142857142857 [2024-06-27 17:50:30,399 INFO L175 Difference]: Start difference. First operand has 126 places, 153 transitions, 1436 flow. Second operand 7 states and 216 transitions. [2024-06-27 17:50:30,400 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 194 transitions, 1906 flow [2024-06-27 17:50:30,448 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 194 transitions, 1841 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-27 17:50:30,450 INFO L231 Difference]: Finished difference. Result has 128 places, 153 transitions, 1508 flow [2024-06-27 17:50:30,451 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1371, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1508, PETRI_PLACES=128, PETRI_TRANSITIONS=153} [2024-06-27 17:50:30,451 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 79 predicate places. [2024-06-27 17:50:30,451 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 153 transitions, 1508 flow [2024-06-27 17:50:30,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:30,451 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:30,452 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:30,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-27 17:50:30,452 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:50:30,452 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:30,452 INFO L85 PathProgramCache]: Analyzing trace with hash -81736619, now seen corresponding path program 2 times [2024-06-27 17:50:30,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:30,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090545724] [2024-06-27 17:50:30,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:30,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:30,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:30,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:30,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:30,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090545724] [2024-06-27 17:50:30,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090545724] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:30,539 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:30,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:50:30,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417360914] [2024-06-27 17:50:30,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:30,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:50:30,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:30,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:50:30,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:50:30,576 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:50:30,576 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 153 transitions, 1508 flow. Second operand has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:30,576 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:30,576 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:50:30,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:30,972 INFO L124 PetriNetUnfolderBase]: 2242/3680 cut-off events. [2024-06-27 17:50:30,972 INFO L125 PetriNetUnfolderBase]: For 33306/33309 co-relation queries the response was YES. [2024-06-27 17:50:30,989 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17511 conditions, 3680 events. 2242/3680 cut-off events. For 33306/33309 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 22311 event pairs, 559 based on Foata normal form. 4/3672 useless extension candidates. Maximal degree in co-relation 17455. Up to 3136 conditions per place. [2024-06-27 17:50:31,003 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 147 selfloop transitions, 27 changer transitions 0/187 dead transitions. [2024-06-27 17:50:31,004 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 187 transitions, 1955 flow [2024-06-27 17:50:31,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:50:31,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:50:31,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 175 transitions. [2024-06-27 17:50:31,006 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6481481481481481 [2024-06-27 17:50:31,006 INFO L175 Difference]: Start difference. First operand has 128 places, 153 transitions, 1508 flow. Second operand 6 states and 175 transitions. [2024-06-27 17:50:31,006 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 187 transitions, 1955 flow [2024-06-27 17:50:31,055 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 187 transitions, 1824 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-27 17:50:31,057 INFO L231 Difference]: Finished difference. Result has 128 places, 155 transitions, 1463 flow [2024-06-27 17:50:31,058 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1377, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1463, PETRI_PLACES=128, PETRI_TRANSITIONS=155} [2024-06-27 17:50:31,058 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 79 predicate places. [2024-06-27 17:50:31,058 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 155 transitions, 1463 flow [2024-06-27 17:50:31,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:31,067 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:31,071 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:31,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-27 17:50:31,071 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:50:31,072 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:31,072 INFO L85 PathProgramCache]: Analyzing trace with hash 154438741, now seen corresponding path program 3 times [2024-06-27 17:50:31,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:31,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59662567] [2024-06-27 17:50:31,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:31,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:31,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:31,208 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:31,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:31,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59662567] [2024-06-27 17:50:31,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59662567] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:31,209 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:31,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:50:31,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20856148] [2024-06-27 17:50:31,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:31,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:50:31,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:31,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:50:31,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:50:31,245 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:50:31,245 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 155 transitions, 1463 flow. Second operand has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:31,245 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:31,245 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:50:31,245 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:31,631 INFO L124 PetriNetUnfolderBase]: 2269/3708 cut-off events. [2024-06-27 17:50:31,631 INFO L125 PetriNetUnfolderBase]: For 32974/32989 co-relation queries the response was YES. [2024-06-27 17:50:31,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17512 conditions, 3708 events. 2269/3708 cut-off events. For 32974/32989 co-relation queries the response was YES. Maximal size of possible extension queue 232. Compared 22773 event pairs, 829 based on Foata normal form. 14/3685 useless extension candidates. Maximal degree in co-relation 17455. Up to 3203 conditions per place. [2024-06-27 17:50:31,664 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 149 selfloop transitions, 24 changer transitions 0/186 dead transitions. [2024-06-27 17:50:31,664 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 186 transitions, 1904 flow [2024-06-27 17:50:31,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:50:31,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:50:31,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 171 transitions. [2024-06-27 17:50:31,665 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6333333333333333 [2024-06-27 17:50:31,665 INFO L175 Difference]: Start difference. First operand has 128 places, 155 transitions, 1463 flow. Second operand 6 states and 171 transitions. [2024-06-27 17:50:31,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 186 transitions, 1904 flow [2024-06-27 17:50:31,712 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 186 transitions, 1834 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-27 17:50:31,714 INFO L231 Difference]: Finished difference. Result has 130 places, 157 transitions, 1474 flow [2024-06-27 17:50:31,715 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1397, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1474, PETRI_PLACES=130, PETRI_TRANSITIONS=157} [2024-06-27 17:50:31,715 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 81 predicate places. [2024-06-27 17:50:31,716 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 157 transitions, 1474 flow [2024-06-27 17:50:31,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:31,716 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:31,716 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:31,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-27 17:50:31,716 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:50:31,717 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:31,717 INFO L85 PathProgramCache]: Analyzing trace with hash 154735411, now seen corresponding path program 4 times [2024-06-27 17:50:31,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:31,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699662243] [2024-06-27 17:50:31,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:31,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:31,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:31,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:31,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:31,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699662243] [2024-06-27 17:50:31,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699662243] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:31,808 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:31,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:50:31,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19083042] [2024-06-27 17:50:31,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:31,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:50:31,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:31,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:50:31,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:50:31,849 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:50:31,850 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 157 transitions, 1474 flow. Second operand has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:31,850 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:31,850 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:50:31,850 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:32,195 INFO L124 PetriNetUnfolderBase]: 2261/3680 cut-off events. [2024-06-27 17:50:32,196 INFO L125 PetriNetUnfolderBase]: For 32285/32300 co-relation queries the response was YES. [2024-06-27 17:50:32,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17299 conditions, 3680 events. 2261/3680 cut-off events. For 32285/32300 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 22535 event pairs, 762 based on Foata normal form. 14/3657 useless extension candidates. Maximal degree in co-relation 17241. Up to 3080 conditions per place. [2024-06-27 17:50:32,223 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 145 selfloop transitions, 31 changer transitions 0/189 dead transitions. [2024-06-27 17:50:32,224 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 189 transitions, 1923 flow [2024-06-27 17:50:32,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:50:32,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:50:32,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 172 transitions. [2024-06-27 17:50:32,225 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6370370370370371 [2024-06-27 17:50:32,225 INFO L175 Difference]: Start difference. First operand has 130 places, 157 transitions, 1474 flow. Second operand 6 states and 172 transitions. [2024-06-27 17:50:32,225 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 189 transitions, 1923 flow [2024-06-27 17:50:32,269 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 189 transitions, 1864 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-27 17:50:32,317 INFO L231 Difference]: Finished difference. Result has 132 places, 159 transitions, 1510 flow [2024-06-27 17:50:32,317 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1415, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1510, PETRI_PLACES=132, PETRI_TRANSITIONS=159} [2024-06-27 17:50:32,317 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 83 predicate places. [2024-06-27 17:50:32,317 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 159 transitions, 1510 flow [2024-06-27 17:50:32,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:32,318 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:32,318 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:32,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-27 17:50:32,318 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:50:32,318 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:32,318 INFO L85 PathProgramCache]: Analyzing trace with hash -449597377, now seen corresponding path program 1 times [2024-06-27 17:50:32,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:32,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201374741] [2024-06-27 17:50:32,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:32,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:32,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:32,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:32,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:32,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201374741] [2024-06-27 17:50:32,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201374741] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:32,408 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:32,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:50:32,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875742850] [2024-06-27 17:50:32,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:32,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:50:32,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:32,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:50:32,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:50:32,489 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:50:32,489 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 159 transitions, 1510 flow. Second operand has 8 states, 8 states have (on average 18.5) internal successors, (148), 8 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:32,489 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:32,489 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:50:32,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:32,903 INFO L124 PetriNetUnfolderBase]: 2415/3985 cut-off events. [2024-06-27 17:50:32,903 INFO L125 PetriNetUnfolderBase]: For 39938/39941 co-relation queries the response was YES. [2024-06-27 17:50:32,922 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18844 conditions, 3985 events. 2415/3985 cut-off events. For 39938/39941 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 24994 event pairs, 629 based on Foata normal form. 12/3960 useless extension candidates. Maximal degree in co-relation 18785. Up to 2803 conditions per place. [2024-06-27 17:50:32,935 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 159 selfloop transitions, 51 changer transitions 0/223 dead transitions. [2024-06-27 17:50:32,935 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 223 transitions, 2257 flow [2024-06-27 17:50:32,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:50:32,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:50:32,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 239 transitions. [2024-06-27 17:50:32,936 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6638888888888889 [2024-06-27 17:50:32,936 INFO L175 Difference]: Start difference. First operand has 132 places, 159 transitions, 1510 flow. Second operand 8 states and 239 transitions. [2024-06-27 17:50:32,937 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 223 transitions, 2257 flow [2024-06-27 17:50:32,998 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 223 transitions, 2180 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-27 17:50:33,000 INFO L231 Difference]: Finished difference. Result has 138 places, 164 transitions, 1629 flow [2024-06-27 17:50:33,000 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1433, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1629, PETRI_PLACES=138, PETRI_TRANSITIONS=164} [2024-06-27 17:50:33,000 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 89 predicate places. [2024-06-27 17:50:33,001 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 164 transitions, 1629 flow [2024-06-27 17:50:33,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.5) internal successors, (148), 8 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:33,001 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:33,001 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:33,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-27 17:50:33,001 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:50:33,002 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:33,002 INFO L85 PathProgramCache]: Analyzing trace with hash 1269566917, now seen corresponding path program 2 times [2024-06-27 17:50:33,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:33,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087682075] [2024-06-27 17:50:33,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:33,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:33,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:33,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:33,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:33,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087682075] [2024-06-27 17:50:33,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087682075] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:33,094 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:33,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:50:33,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177405507] [2024-06-27 17:50:33,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:33,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:50:33,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:33,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:50:33,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:50:33,137 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:50:33,138 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 164 transitions, 1629 flow. Second operand has 8 states, 8 states have (on average 18.5) internal successors, (148), 8 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:33,138 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:33,138 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:50:33,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:33,628 INFO L124 PetriNetUnfolderBase]: 2509/4146 cut-off events. [2024-06-27 17:50:33,628 INFO L125 PetriNetUnfolderBase]: For 45416/45419 co-relation queries the response was YES. [2024-06-27 17:50:33,643 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19969 conditions, 4146 events. 2509/4146 cut-off events. For 45416/45419 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 26336 event pairs, 856 based on Foata normal form. 16/4121 useless extension candidates. Maximal degree in co-relation 19907. Up to 3349 conditions per place. [2024-06-27 17:50:33,656 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 153 selfloop transitions, 49 changer transitions 0/215 dead transitions. [2024-06-27 17:50:33,656 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 215 transitions, 2185 flow [2024-06-27 17:50:33,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:50:33,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:50:33,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 234 transitions. [2024-06-27 17:50:33,665 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.65 [2024-06-27 17:50:33,665 INFO L175 Difference]: Start difference. First operand has 138 places, 164 transitions, 1629 flow. Second operand 8 states and 234 transitions. [2024-06-27 17:50:33,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 215 transitions, 2185 flow [2024-06-27 17:50:33,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 215 transitions, 2106 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-27 17:50:33,737 INFO L231 Difference]: Finished difference. Result has 143 places, 165 transitions, 1674 flow [2024-06-27 17:50:33,752 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1550, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1674, PETRI_PLACES=143, PETRI_TRANSITIONS=165} [2024-06-27 17:50:33,754 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 94 predicate places. [2024-06-27 17:50:33,754 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 165 transitions, 1674 flow [2024-06-27 17:50:33,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.5) internal successors, (148), 8 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:33,755 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:33,755 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:33,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-27 17:50:33,755 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:50:33,755 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:33,755 INFO L85 PathProgramCache]: Analyzing trace with hash 1787833535, now seen corresponding path program 3 times [2024-06-27 17:50:33,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:33,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925861182] [2024-06-27 17:50:33,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:33,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:33,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:33,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:33,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:33,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925861182] [2024-06-27 17:50:33,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925861182] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:33,867 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:33,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:50:33,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469397477] [2024-06-27 17:50:33,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:33,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:50:33,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:33,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:50:33,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:50:33,911 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:50:33,913 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 165 transitions, 1674 flow. Second operand has 8 states, 8 states have (on average 18.5) internal successors, (148), 8 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:33,913 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:33,913 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:50:33,913 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:34,354 INFO L124 PetriNetUnfolderBase]: 2576/4111 cut-off events. [2024-06-27 17:50:34,354 INFO L125 PetriNetUnfolderBase]: For 47538/47541 co-relation queries the response was YES. [2024-06-27 17:50:34,375 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20627 conditions, 4111 events. 2576/4111 cut-off events. For 47538/47541 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 25205 event pairs, 489 based on Foata normal form. 12/4117 useless extension candidates. Maximal degree in co-relation 20563. Up to 3333 conditions per place. [2024-06-27 17:50:34,389 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 157 selfloop transitions, 51 changer transitions 0/221 dead transitions. [2024-06-27 17:50:34,389 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 221 transitions, 2284 flow [2024-06-27 17:50:34,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:50:34,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:50:34,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 237 transitions. [2024-06-27 17:50:34,390 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6583333333333333 [2024-06-27 17:50:34,391 INFO L175 Difference]: Start difference. First operand has 143 places, 165 transitions, 1674 flow. Second operand 8 states and 237 transitions. [2024-06-27 17:50:34,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 221 transitions, 2284 flow [2024-06-27 17:50:34,477 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 221 transitions, 2181 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-27 17:50:34,479 INFO L231 Difference]: Finished difference. Result has 146 places, 168 transitions, 1736 flow [2024-06-27 17:50:34,480 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1571, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1736, PETRI_PLACES=146, PETRI_TRANSITIONS=168} [2024-06-27 17:50:34,480 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 97 predicate places. [2024-06-27 17:50:34,480 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 168 transitions, 1736 flow [2024-06-27 17:50:34,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.5) internal successors, (148), 8 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:34,480 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:34,481 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:34,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-27 17:50:34,481 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:50:34,481 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:34,481 INFO L85 PathProgramCache]: Analyzing trace with hash 548625891, now seen corresponding path program 4 times [2024-06-27 17:50:34,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:34,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887816223] [2024-06-27 17:50:34,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:34,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:34,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:34,610 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:34,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:34,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887816223] [2024-06-27 17:50:34,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887816223] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:34,611 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:34,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:50:34,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142039098] [2024-06-27 17:50:34,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:34,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:50:34,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:34,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:50:34,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:50:34,655 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:50:34,656 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 168 transitions, 1736 flow. Second operand has 8 states, 8 states have (on average 18.5) internal successors, (148), 8 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:34,656 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:34,656 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:50:34,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:35,169 INFO L124 PetriNetUnfolderBase]: 2670/4437 cut-off events. [2024-06-27 17:50:35,169 INFO L125 PetriNetUnfolderBase]: For 54419/54422 co-relation queries the response was YES. [2024-06-27 17:50:35,188 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21747 conditions, 4437 events. 2670/4437 cut-off events. For 54419/54422 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 28642 event pairs, 942 based on Foata normal form. 16/4411 useless extension candidates. Maximal degree in co-relation 21681. Up to 3705 conditions per place. [2024-06-27 17:50:35,202 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 171 selfloop transitions, 32 changer transitions 0/216 dead transitions. [2024-06-27 17:50:35,202 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 216 transitions, 2290 flow [2024-06-27 17:50:35,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:50:35,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:50:35,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 231 transitions. [2024-06-27 17:50:35,216 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6416666666666667 [2024-06-27 17:50:35,217 INFO L175 Difference]: Start difference. First operand has 146 places, 168 transitions, 1736 flow. Second operand 8 states and 231 transitions. [2024-06-27 17:50:35,217 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 216 transitions, 2290 flow [2024-06-27 17:50:35,333 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 216 transitions, 2213 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-27 17:50:35,335 INFO L231 Difference]: Finished difference. Result has 150 places, 169 transitions, 1753 flow [2024-06-27 17:50:35,335 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1659, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1753, PETRI_PLACES=150, PETRI_TRANSITIONS=169} [2024-06-27 17:50:35,335 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 101 predicate places. [2024-06-27 17:50:35,336 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 169 transitions, 1753 flow [2024-06-27 17:50:35,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.5) internal successors, (148), 8 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:35,336 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:35,349 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:35,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-27 17:50:35,349 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:50:35,349 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:35,349 INFO L85 PathProgramCache]: Analyzing trace with hash 548478021, now seen corresponding path program 5 times [2024-06-27 17:50:35,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:35,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080887559] [2024-06-27 17:50:35,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:35,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:35,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:35,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:35,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:35,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080887559] [2024-06-27 17:50:35,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080887559] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:35,449 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:35,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:50:35,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697411576] [2024-06-27 17:50:35,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:35,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:50:35,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:35,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:50:35,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:50:35,501 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:50:35,502 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 169 transitions, 1753 flow. Second operand has 8 states, 8 states have (on average 18.5) internal successors, (148), 8 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:35,502 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:35,502 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:50:35,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:36,051 INFO L124 PetriNetUnfolderBase]: 2859/4734 cut-off events. [2024-06-27 17:50:36,051 INFO L125 PetriNetUnfolderBase]: For 63258/63261 co-relation queries the response was YES. [2024-06-27 17:50:36,077 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23818 conditions, 4734 events. 2859/4734 cut-off events. For 63258/63261 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 30963 event pairs, 956 based on Foata normal form. 12/4707 useless extension candidates. Maximal degree in co-relation 23750. Up to 3715 conditions per place. [2024-06-27 17:50:36,096 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 177 selfloop transitions, 34 changer transitions 0/224 dead transitions. [2024-06-27 17:50:36,096 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 224 transitions, 2473 flow [2024-06-27 17:50:36,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:50:36,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:50:36,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 235 transitions. [2024-06-27 17:50:36,097 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6527777777777778 [2024-06-27 17:50:36,097 INFO L175 Difference]: Start difference. First operand has 150 places, 169 transitions, 1753 flow. Second operand 8 states and 235 transitions. [2024-06-27 17:50:36,098 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 224 transitions, 2473 flow [2024-06-27 17:50:36,199 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 224 transitions, 2400 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-27 17:50:36,202 INFO L231 Difference]: Finished difference. Result has 153 places, 172 transitions, 1823 flow [2024-06-27 17:50:36,202 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1680, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1823, PETRI_PLACES=153, PETRI_TRANSITIONS=172} [2024-06-27 17:50:36,202 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 104 predicate places. [2024-06-27 17:50:36,203 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 172 transitions, 1823 flow [2024-06-27 17:50:36,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.5) internal successors, (148), 8 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:36,203 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:36,203 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:36,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-27 17:50:36,203 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:50:36,204 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:36,204 INFO L85 PathProgramCache]: Analyzing trace with hash 553988271, now seen corresponding path program 6 times [2024-06-27 17:50:36,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:36,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104270571] [2024-06-27 17:50:36,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:36,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:36,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:36,309 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 17:50:36,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:36,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104270571] [2024-06-27 17:50:36,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104270571] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:36,309 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:36,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:50:36,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478701304] [2024-06-27 17:50:36,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:36,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:50:36,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:36,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:50:36,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:50:36,365 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:50:36,366 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 172 transitions, 1823 flow. Second operand has 8 states, 8 states have (on average 18.5) internal successors, (148), 8 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:36,366 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:36,366 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:50:36,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:36,954 INFO L124 PetriNetUnfolderBase]: 2831/4534 cut-off events. [2024-06-27 17:50:36,955 INFO L125 PetriNetUnfolderBase]: For 62409/62412 co-relation queries the response was YES. [2024-06-27 17:50:36,980 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23286 conditions, 4534 events. 2831/4534 cut-off events. For 62409/62412 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 28516 event pairs, 567 based on Foata normal form. 16/4544 useless extension candidates. Maximal degree in co-relation 23216. Up to 3964 conditions per place. [2024-06-27 17:50:36,999 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 186 selfloop transitions, 33 changer transitions 0/232 dead transitions. [2024-06-27 17:50:37,000 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 232 transitions, 2442 flow [2024-06-27 17:50:37,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 17:50:37,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 17:50:37,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 281 transitions. [2024-06-27 17:50:37,001 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6244444444444445 [2024-06-27 17:50:37,001 INFO L175 Difference]: Start difference. First operand has 153 places, 172 transitions, 1823 flow. Second operand 10 states and 281 transitions. [2024-06-27 17:50:37,001 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 232 transitions, 2442 flow [2024-06-27 17:50:37,131 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 232 transitions, 2366 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-06-27 17:50:37,133 INFO L231 Difference]: Finished difference. Result has 159 places, 173 transitions, 1848 flow [2024-06-27 17:50:37,133 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1759, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1848, PETRI_PLACES=159, PETRI_TRANSITIONS=173} [2024-06-27 17:50:37,134 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 110 predicate places. [2024-06-27 17:50:37,134 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 173 transitions, 1848 flow [2024-06-27 17:50:37,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.5) internal successors, (148), 8 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:37,134 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:37,134 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:37,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-27 17:50:37,135 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:50:37,135 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:37,135 INFO L85 PathProgramCache]: Analyzing trace with hash 1072617961, now seen corresponding path program 1 times [2024-06-27 17:50:37,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:37,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996088229] [2024-06-27 17:50:37,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:37,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:37,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:37,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:37,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:37,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996088229] [2024-06-27 17:50:37,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996088229] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:37,238 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:37,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:50:37,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197446387] [2024-06-27 17:50:37,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:37,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:50:37,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:37,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:50:37,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:50:37,296 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:50:37,297 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 173 transitions, 1848 flow. Second operand has 8 states, 8 states have (on average 18.5) internal successors, (148), 8 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:37,297 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:37,297 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:50:37,297 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:37,867 INFO L124 PetriNetUnfolderBase]: 2898/4657 cut-off events. [2024-06-27 17:50:37,867 INFO L125 PetriNetUnfolderBase]: For 62344/62347 co-relation queries the response was YES. [2024-06-27 17:50:37,892 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23663 conditions, 4657 events. 2898/4657 cut-off events. For 62344/62347 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 29553 event pairs, 563 based on Foata normal form. 12/4663 useless extension candidates. Maximal degree in co-relation 23591. Up to 3816 conditions per place. [2024-06-27 17:50:37,908 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 186 selfloop transitions, 37 changer transitions 0/236 dead transitions. [2024-06-27 17:50:37,908 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 236 transitions, 2477 flow [2024-06-27 17:50:37,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 17:50:37,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 17:50:37,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 283 transitions. [2024-06-27 17:50:37,909 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6288888888888889 [2024-06-27 17:50:37,909 INFO L175 Difference]: Start difference. First operand has 159 places, 173 transitions, 1848 flow. Second operand 10 states and 283 transitions. [2024-06-27 17:50:37,910 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 236 transitions, 2477 flow [2024-06-27 17:50:37,995 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 236 transitions, 2412 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-06-27 17:50:37,998 INFO L231 Difference]: Finished difference. Result has 161 places, 174 transitions, 1881 flow [2024-06-27 17:50:37,998 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1783, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1881, PETRI_PLACES=161, PETRI_TRANSITIONS=174} [2024-06-27 17:50:37,998 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 112 predicate places. [2024-06-27 17:50:37,999 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 174 transitions, 1881 flow [2024-06-27 17:50:37,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.5) internal successors, (148), 8 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:37,999 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:37,999 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:37,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-27 17:50:37,999 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:50:38,000 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:38,000 INFO L85 PathProgramCache]: Analyzing trace with hash -195243217, now seen corresponding path program 7 times [2024-06-27 17:50:38,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:38,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877857359] [2024-06-27 17:50:38,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:38,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:38,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:38,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:38,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:38,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877857359] [2024-06-27 17:50:38,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877857359] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:38,095 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:38,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:50:38,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312421897] [2024-06-27 17:50:38,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:38,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:50:38,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:38,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:50:38,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:50:38,143 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:50:38,144 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 174 transitions, 1881 flow. Second operand has 8 states, 8 states have (on average 18.5) internal successors, (148), 8 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:38,144 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:38,144 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:50:38,144 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:38,727 INFO L124 PetriNetUnfolderBase]: 2992/4969 cut-off events. [2024-06-27 17:50:38,728 INFO L125 PetriNetUnfolderBase]: For 70390/70393 co-relation queries the response was YES. [2024-06-27 17:50:38,752 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24839 conditions, 4969 events. 2992/4969 cut-off events. For 70390/70393 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 32972 event pairs, 1024 based on Foata normal form. 16/4938 useless extension candidates. Maximal degree in co-relation 24766. Up to 4020 conditions per place. [2024-06-27 17:50:38,768 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 170 selfloop transitions, 48 changer transitions 0/231 dead transitions. [2024-06-27 17:50:38,769 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 231 transitions, 2491 flow [2024-06-27 17:50:38,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 17:50:38,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 17:50:38,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 260 transitions. [2024-06-27 17:50:38,770 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6419753086419753 [2024-06-27 17:50:38,770 INFO L175 Difference]: Start difference. First operand has 161 places, 174 transitions, 1881 flow. Second operand 9 states and 260 transitions. [2024-06-27 17:50:38,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 231 transitions, 2491 flow [2024-06-27 17:50:38,876 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 231 transitions, 2407 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-27 17:50:38,879 INFO L231 Difference]: Finished difference. Result has 162 places, 175 transitions, 1930 flow [2024-06-27 17:50:38,879 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1797, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1930, PETRI_PLACES=162, PETRI_TRANSITIONS=175} [2024-06-27 17:50:38,879 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 113 predicate places. [2024-06-27 17:50:38,880 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 175 transitions, 1930 flow [2024-06-27 17:50:38,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.5) internal successors, (148), 8 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:38,880 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:38,880 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:38,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-27 17:50:38,880 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:50:38,881 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:38,881 INFO L85 PathProgramCache]: Analyzing trace with hash 1755555741, now seen corresponding path program 8 times [2024-06-27 17:50:38,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:38,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716555171] [2024-06-27 17:50:38,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:38,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:38,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:38,990 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:38,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:38,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716555171] [2024-06-27 17:50:38,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716555171] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:38,991 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:38,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:50:38,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37952040] [2024-06-27 17:50:38,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:38,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:50:38,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:38,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:50:38,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:50:39,035 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:50:39,035 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 175 transitions, 1930 flow. Second operand has 8 states, 8 states have (on average 18.5) internal successors, (148), 8 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:39,036 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:39,036 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:50:39,036 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:39,569 INFO L124 PetriNetUnfolderBase]: 3086/4991 cut-off events. [2024-06-27 17:50:39,569 INFO L125 PetriNetUnfolderBase]: For 76295/76298 co-relation queries the response was YES. [2024-06-27 17:50:39,595 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25680 conditions, 4991 events. 3086/4991 cut-off events. For 76295/76298 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 32499 event pairs, 756 based on Foata normal form. 16/4993 useless extension candidates. Maximal degree in co-relation 25606. Up to 4170 conditions per place. [2024-06-27 17:50:39,612 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 161 selfloop transitions, 46 changer transitions 0/220 dead transitions. [2024-06-27 17:50:39,612 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 220 transitions, 2492 flow [2024-06-27 17:50:39,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:50:39,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:50:39,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 208 transitions. [2024-06-27 17:50:39,613 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6603174603174603 [2024-06-27 17:50:39,613 INFO L175 Difference]: Start difference. First operand has 162 places, 175 transitions, 1930 flow. Second operand 7 states and 208 transitions. [2024-06-27 17:50:39,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 220 transitions, 2492 flow [2024-06-27 17:50:39,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 220 transitions, 2388 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-27 17:50:39,750 INFO L231 Difference]: Finished difference. Result has 162 places, 176 transitions, 1957 flow [2024-06-27 17:50:39,751 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1826, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1957, PETRI_PLACES=162, PETRI_TRANSITIONS=176} [2024-06-27 17:50:39,751 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 113 predicate places. [2024-06-27 17:50:39,751 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 176 transitions, 1957 flow [2024-06-27 17:50:39,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.5) internal successors, (148), 8 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:39,751 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:39,752 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:39,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-27 17:50:39,752 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:50:39,752 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:39,752 INFO L85 PathProgramCache]: Analyzing trace with hash 235919179, now seen corresponding path program 9 times [2024-06-27 17:50:39,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:39,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507698648] [2024-06-27 17:50:39,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:39,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:39,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:39,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:39,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:39,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507698648] [2024-06-27 17:50:39,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507698648] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:39,871 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:39,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:50:39,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583887229] [2024-06-27 17:50:39,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:39,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:50:39,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:39,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:50:39,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:50:39,912 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:50:39,913 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 176 transitions, 1957 flow. Second operand has 8 states, 8 states have (on average 18.5) internal successors, (148), 8 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:39,913 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:39,913 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:50:39,913 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:40,594 INFO L124 PetriNetUnfolderBase]: 3145/5086 cut-off events. [2024-06-27 17:50:40,594 INFO L125 PetriNetUnfolderBase]: For 80111/80126 co-relation queries the response was YES. [2024-06-27 17:50:40,617 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26130 conditions, 5086 events. 3145/5086 cut-off events. For 80111/80126 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 33187 event pairs, 650 based on Foata normal form. 26/5102 useless extension candidates. Maximal degree in co-relation 26055. Up to 4399 conditions per place. [2024-06-27 17:50:40,632 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 171 selfloop transitions, 46 changer transitions 0/230 dead transitions. [2024-06-27 17:50:40,633 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 230 transitions, 2561 flow [2024-06-27 17:50:40,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 17:50:40,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 17:50:40,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 255 transitions. [2024-06-27 17:50:40,634 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6296296296296297 [2024-06-27 17:50:40,634 INFO L175 Difference]: Start difference. First operand has 162 places, 176 transitions, 1957 flow. Second operand 9 states and 255 transitions. [2024-06-27 17:50:40,634 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 230 transitions, 2561 flow [2024-06-27 17:50:40,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 230 transitions, 2461 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-27 17:50:40,773 INFO L231 Difference]: Finished difference. Result has 166 places, 177 transitions, 1987 flow [2024-06-27 17:50:40,773 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1857, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1987, PETRI_PLACES=166, PETRI_TRANSITIONS=177} [2024-06-27 17:50:40,773 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 117 predicate places. [2024-06-27 17:50:40,773 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 177 transitions, 1987 flow [2024-06-27 17:50:40,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.5) internal successors, (148), 8 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:40,774 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:40,774 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:40,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-27 17:50:40,774 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:50:40,774 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:40,774 INFO L85 PathProgramCache]: Analyzing trace with hash -200753467, now seen corresponding path program 10 times [2024-06-27 17:50:40,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:40,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782627886] [2024-06-27 17:50:40,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:40,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:40,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:40,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:40,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:40,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782627886] [2024-06-27 17:50:40,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782627886] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:40,873 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:40,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:50:40,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381158865] [2024-06-27 17:50:40,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:40,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:50:40,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:40,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:50:40,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:50:40,921 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:50:40,921 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 177 transitions, 1987 flow. Second operand has 8 states, 8 states have (on average 18.5) internal successors, (148), 8 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:40,921 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:40,921 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:50:40,922 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:41,518 INFO L124 PetriNetUnfolderBase]: 3125/5173 cut-off events. [2024-06-27 17:50:41,518 INFO L125 PetriNetUnfolderBase]: For 75312/75315 co-relation queries the response was YES. [2024-06-27 17:50:41,551 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25683 conditions, 5173 events. 3125/5173 cut-off events. For 75312/75315 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 34484 event pairs, 823 based on Foata normal form. 12/5142 useless extension candidates. Maximal degree in co-relation 25607. Up to 3551 conditions per place. [2024-06-27 17:50:41,570 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 159 selfloop transitions, 54 changer transitions 0/226 dead transitions. [2024-06-27 17:50:41,570 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 226 transitions, 2588 flow [2024-06-27 17:50:41,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:50:41,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:50:41,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 211 transitions. [2024-06-27 17:50:41,571 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6698412698412698 [2024-06-27 17:50:41,571 INFO L175 Difference]: Start difference. First operand has 166 places, 177 transitions, 1987 flow. Second operand 7 states and 211 transitions. [2024-06-27 17:50:41,572 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 226 transitions, 2588 flow [2024-06-27 17:50:41,727 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 226 transitions, 2463 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-27 17:50:41,729 INFO L231 Difference]: Finished difference. Result has 167 places, 179 transitions, 2045 flow [2024-06-27 17:50:41,729 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1870, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2045, PETRI_PLACES=167, PETRI_TRANSITIONS=179} [2024-06-27 17:50:41,730 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 118 predicate places. [2024-06-27 17:50:41,730 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 179 transitions, 2045 flow [2024-06-27 17:50:41,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.5) internal successors, (148), 8 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:41,730 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:41,730 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:41,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-27 17:50:41,731 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:50:41,731 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:41,731 INFO L85 PathProgramCache]: Analyzing trace with hash 236134381, now seen corresponding path program 2 times [2024-06-27 17:50:41,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:41,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520594710] [2024-06-27 17:50:41,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:41,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:41,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:41,818 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:41,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:41,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520594710] [2024-06-27 17:50:41,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520594710] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:41,819 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:41,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:50:41,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611753294] [2024-06-27 17:50:41,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:41,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:50:41,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:41,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:50:41,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:50:41,870 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:50:41,870 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 179 transitions, 2045 flow. Second operand has 8 states, 8 states have (on average 18.5) internal successors, (148), 8 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:41,871 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:41,871 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:50:41,871 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:42,488 INFO L124 PetriNetUnfolderBase]: 3192/5177 cut-off events. [2024-06-27 17:50:42,488 INFO L125 PetriNetUnfolderBase]: For 77320/77335 co-relation queries the response was YES. [2024-06-27 17:50:42,513 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26215 conditions, 5177 events. 3192/5177 cut-off events. For 77320/77335 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 33985 event pairs, 636 based on Foata normal form. 22/5189 useless extension candidates. Maximal degree in co-relation 26137. Up to 4351 conditions per place. [2024-06-27 17:50:42,530 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 180 selfloop transitions, 49 changer transitions 0/242 dead transitions. [2024-06-27 17:50:42,530 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 242 transitions, 2688 flow [2024-06-27 17:50:42,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 17:50:42,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 17:50:42,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 283 transitions. [2024-06-27 17:50:42,532 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6288888888888889 [2024-06-27 17:50:42,532 INFO L175 Difference]: Start difference. First operand has 167 places, 179 transitions, 2045 flow. Second operand 10 states and 283 transitions. [2024-06-27 17:50:42,532 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 242 transitions, 2688 flow [2024-06-27 17:50:42,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 242 transitions, 2517 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-27 17:50:42,682 INFO L231 Difference]: Finished difference. Result has 170 places, 180 transitions, 1998 flow [2024-06-27 17:50:42,683 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1874, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1998, PETRI_PLACES=170, PETRI_TRANSITIONS=180} [2024-06-27 17:50:42,683 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 121 predicate places. [2024-06-27 17:50:42,684 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 180 transitions, 1998 flow [2024-06-27 17:50:42,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.5) internal successors, (148), 8 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:42,684 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:42,684 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:42,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-27 17:50:42,684 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:50:42,685 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:42,685 INFO L85 PathProgramCache]: Analyzing trace with hash 1761133323, now seen corresponding path program 3 times [2024-06-27 17:50:42,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:42,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926265908] [2024-06-27 17:50:42,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:42,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:42,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:42,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:42,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:42,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926265908] [2024-06-27 17:50:42,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926265908] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:42,770 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:42,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:50:42,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461480021] [2024-06-27 17:50:42,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:42,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:50:42,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:42,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:50:42,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:50:42,820 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:50:42,820 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 180 transitions, 1998 flow. Second operand has 8 states, 8 states have (on average 18.5) internal successors, (148), 8 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:42,820 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:42,820 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:50:42,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:43,415 INFO L124 PetriNetUnfolderBase]: 3259/5447 cut-off events. [2024-06-27 17:50:43,415 INFO L125 PetriNetUnfolderBase]: For 76058/76061 co-relation queries the response was YES. [2024-06-27 17:50:43,444 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26270 conditions, 5447 events. 3259/5447 cut-off events. For 76058/76061 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 36806 event pairs, 754 based on Foata normal form. 12/5451 useless extension candidates. Maximal degree in co-relation 26193. Up to 3939 conditions per place. [2024-06-27 17:50:43,461 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 171 selfloop transitions, 56 changer transitions 0/240 dead transitions. [2024-06-27 17:50:43,462 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 240 transitions, 2633 flow [2024-06-27 17:50:43,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 17:50:43,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 17:50:43,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 262 transitions. [2024-06-27 17:50:43,463 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6469135802469136 [2024-06-27 17:50:43,463 INFO L175 Difference]: Start difference. First operand has 170 places, 180 transitions, 1998 flow. Second operand 9 states and 262 transitions. [2024-06-27 17:50:43,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 240 transitions, 2633 flow [2024-06-27 17:50:43,597 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 240 transitions, 2523 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-06-27 17:50:43,599 INFO L231 Difference]: Finished difference. Result has 171 places, 181 transitions, 2030 flow [2024-06-27 17:50:43,599 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1888, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2030, PETRI_PLACES=171, PETRI_TRANSITIONS=181} [2024-06-27 17:50:43,600 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 122 predicate places. [2024-06-27 17:50:43,600 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 181 transitions, 2030 flow [2024-06-27 17:50:43,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.5) internal successors, (148), 8 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:43,600 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:43,600 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:43,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-27 17:50:43,601 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:50:43,601 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:43,601 INFO L85 PathProgramCache]: Analyzing trace with hash 501831661, now seen corresponding path program 4 times [2024-06-27 17:50:43,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:43,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053710127] [2024-06-27 17:50:43,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:43,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:43,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:43,712 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:43,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:43,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053710127] [2024-06-27 17:50:43,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053710127] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:43,713 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:43,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:50:43,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518952924] [2024-06-27 17:50:43,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:43,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:50:43,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:43,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:50:43,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:50:43,755 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:50:43,756 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 181 transitions, 2030 flow. Second operand has 8 states, 8 states have (on average 18.5) internal successors, (148), 8 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:43,756 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:43,756 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:50:43,756 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:44,492 INFO L124 PetriNetUnfolderBase]: 3239/5382 cut-off events. [2024-06-27 17:50:44,492 INFO L125 PetriNetUnfolderBase]: For 74022/74037 co-relation queries the response was YES. [2024-06-27 17:50:44,518 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25887 conditions, 5382 events. 3239/5382 cut-off events. For 74022/74037 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 36360 event pairs, 962 based on Foata normal form. 22/5359 useless extension candidates. Maximal degree in co-relation 25809. Up to 3492 conditions per place. [2024-06-27 17:50:44,535 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 164 selfloop transitions, 60 changer transitions 0/237 dead transitions. [2024-06-27 17:50:44,535 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 237 transitions, 2567 flow [2024-06-27 17:50:44,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 17:50:44,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 17:50:44,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 257 transitions. [2024-06-27 17:50:44,536 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6345679012345679 [2024-06-27 17:50:44,536 INFO L175 Difference]: Start difference. First operand has 171 places, 181 transitions, 2030 flow. Second operand 9 states and 257 transitions. [2024-06-27 17:50:44,536 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 237 transitions, 2567 flow [2024-06-27 17:50:44,657 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 237 transitions, 2441 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-27 17:50:44,660 INFO L231 Difference]: Finished difference. Result has 172 places, 180 transitions, 1962 flow [2024-06-27 17:50:44,660 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1838, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1962, PETRI_PLACES=172, PETRI_TRANSITIONS=180} [2024-06-27 17:50:44,661 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 123 predicate places. [2024-06-27 17:50:44,661 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 180 transitions, 1962 flow [2024-06-27 17:50:44,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.5) internal successors, (148), 8 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:44,661 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:44,661 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:44,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-27 17:50:44,661 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:50:44,662 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:44,662 INFO L85 PathProgramCache]: Analyzing trace with hash 629666377, now seen corresponding path program 1 times [2024-06-27 17:50:44,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:44,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383145173] [2024-06-27 17:50:44,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:44,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:44,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:44,738 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:44,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:44,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383145173] [2024-06-27 17:50:44,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383145173] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:44,739 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:44,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:50:44,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949307457] [2024-06-27 17:50:44,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:44,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:50:44,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:44,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:50:44,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:50:44,769 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:50:44,769 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 180 transitions, 1962 flow. Second operand has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:44,769 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:44,769 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:50:44,769 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:45,266 INFO L124 PetriNetUnfolderBase]: 3250/5356 cut-off events. [2024-06-27 17:50:45,267 INFO L125 PetriNetUnfolderBase]: For 66576/66579 co-relation queries the response was YES. [2024-06-27 17:50:45,299 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25876 conditions, 5356 events. 3250/5356 cut-off events. For 66576/66579 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 35993 event pairs, 1210 based on Foata normal form. 3/5335 useless extension candidates. Maximal degree in co-relation 25797. Up to 4861 conditions per place. [2024-06-27 17:50:45,317 INFO L140 encePairwiseOnDemand]: 38/45 looper letters, 176 selfloop transitions, 17 changer transitions 0/206 dead transitions. [2024-06-27 17:50:45,318 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 206 transitions, 2529 flow [2024-06-27 17:50:45,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:50:45,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:50:45,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 141 transitions. [2024-06-27 17:50:45,319 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6266666666666667 [2024-06-27 17:50:45,319 INFO L175 Difference]: Start difference. First operand has 172 places, 180 transitions, 1962 flow. Second operand 5 states and 141 transitions. [2024-06-27 17:50:45,319 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 206 transitions, 2529 flow [2024-06-27 17:50:45,436 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 206 transitions, 2360 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-06-27 17:50:45,438 INFO L231 Difference]: Finished difference. Result has 169 places, 186 transitions, 1903 flow [2024-06-27 17:50:45,439 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1793, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1903, PETRI_PLACES=169, PETRI_TRANSITIONS=186} [2024-06-27 17:50:45,439 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 120 predicate places. [2024-06-27 17:50:45,439 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 186 transitions, 1903 flow [2024-06-27 17:50:45,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:45,440 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:45,440 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:45,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-27 17:50:45,440 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:50:45,440 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:45,440 INFO L85 PathProgramCache]: Analyzing trace with hash 651956617, now seen corresponding path program 2 times [2024-06-27 17:50:45,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:45,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363030267] [2024-06-27 17:50:45,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:45,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:45,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:45,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:45,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:45,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363030267] [2024-06-27 17:50:45,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363030267] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:45,522 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:45,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:50:45,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780198506] [2024-06-27 17:50:45,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:45,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:50:45,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:45,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:50:45,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:50:45,546 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:50:45,546 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 186 transitions, 1903 flow. Second operand has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:45,546 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:45,546 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:50:45,546 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:46,198 INFO L124 PetriNetUnfolderBase]: 3247/5288 cut-off events. [2024-06-27 17:50:46,198 INFO L125 PetriNetUnfolderBase]: For 67247/67250 co-relation queries the response was YES. [2024-06-27 17:50:46,226 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25111 conditions, 5288 events. 3247/5288 cut-off events. For 67247/67250 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 35059 event pairs, 652 based on Foata normal form. 3/5288 useless extension candidates. Maximal degree in co-relation 25032. Up to 4865 conditions per place. [2024-06-27 17:50:46,246 INFO L140 encePairwiseOnDemand]: 38/45 looper letters, 175 selfloop transitions, 14 changer transitions 0/202 dead transitions. [2024-06-27 17:50:46,246 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 202 transitions, 2324 flow [2024-06-27 17:50:46,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 17:50:46,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 17:50:46,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 117 transitions. [2024-06-27 17:50:46,247 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.65 [2024-06-27 17:50:46,247 INFO L175 Difference]: Start difference. First operand has 169 places, 186 transitions, 1903 flow. Second operand 4 states and 117 transitions. [2024-06-27 17:50:46,247 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 202 transitions, 2324 flow [2024-06-27 17:50:46,389 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 202 transitions, 2272 flow, removed 22 selfloop flow, removed 1 redundant places. [2024-06-27 17:50:46,392 INFO L231 Difference]: Finished difference. Result has 172 places, 186 transitions, 1889 flow [2024-06-27 17:50:46,392 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1851, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1889, PETRI_PLACES=172, PETRI_TRANSITIONS=186} [2024-06-27 17:50:46,393 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 123 predicate places. [2024-06-27 17:50:46,393 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 186 transitions, 1889 flow [2024-06-27 17:50:46,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:46,393 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:46,393 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:46,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-27 17:50:46,394 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:50:46,394 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:46,394 INFO L85 PathProgramCache]: Analyzing trace with hash 2139766657, now seen corresponding path program 1 times [2024-06-27 17:50:46,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:46,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851415713] [2024-06-27 17:50:46,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:46,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:46,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:46,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:46,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:46,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851415713] [2024-06-27 17:50:46,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851415713] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:46,485 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:46,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:50:46,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148021210] [2024-06-27 17:50:46,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:46,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:50:46,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:46,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:50:46,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:50:46,520 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 17:50:46,521 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 186 transitions, 1889 flow. Second operand has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:46,521 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:46,521 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 17:50:46,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:47,134 INFO L124 PetriNetUnfolderBase]: 3150/5162 cut-off events. [2024-06-27 17:50:47,134 INFO L125 PetriNetUnfolderBase]: For 73495/73517 co-relation queries the response was YES. [2024-06-27 17:50:47,167 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24524 conditions, 5162 events. 3150/5162 cut-off events. For 73495/73517 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 34497 event pairs, 644 based on Foata normal form. 29/5135 useless extension candidates. Maximal degree in co-relation 24443. Up to 4537 conditions per place. [2024-06-27 17:50:47,187 INFO L140 encePairwiseOnDemand]: 38/45 looper letters, 154 selfloop transitions, 29 changer transitions 0/205 dead transitions. [2024-06-27 17:50:47,187 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 205 transitions, 2325 flow [2024-06-27 17:50:47,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:50:47,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:50:47,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 143 transitions. [2024-06-27 17:50:47,188 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6355555555555555 [2024-06-27 17:50:47,189 INFO L175 Difference]: Start difference. First operand has 172 places, 186 transitions, 1889 flow. Second operand 5 states and 143 transitions. [2024-06-27 17:50:47,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 205 transitions, 2325 flow [2024-06-27 17:50:47,342 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 205 transitions, 2297 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-27 17:50:47,345 INFO L231 Difference]: Finished difference. Result has 174 places, 189 transitions, 1966 flow [2024-06-27 17:50:47,345 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1861, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1966, PETRI_PLACES=174, PETRI_TRANSITIONS=189} [2024-06-27 17:50:47,345 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 125 predicate places. [2024-06-27 17:50:47,345 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 189 transitions, 1966 flow [2024-06-27 17:50:47,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:47,348 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:47,348 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:47,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-27 17:50:47,348 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:50:47,349 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:47,350 INFO L85 PathProgramCache]: Analyzing trace with hash 1672783589, now seen corresponding path program 1 times [2024-06-27 17:50:47,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:47,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442519525] [2024-06-27 17:50:47,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:47,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:47,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:47,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:47,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:47,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442519525] [2024-06-27 17:50:47,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442519525] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:47,423 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:47,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:50:47,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13905169] [2024-06-27 17:50:47,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:47,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:50:47,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:47,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:50:47,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:50:47,453 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:50:47,453 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 189 transitions, 1966 flow. Second operand has 6 states, 6 states have (on average 19.333333333333332) internal successors, (116), 6 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:47,453 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:47,453 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:50:47,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:48,003 INFO L124 PetriNetUnfolderBase]: 3295/5445 cut-off events. [2024-06-27 17:50:48,004 INFO L125 PetriNetUnfolderBase]: For 73036/73048 co-relation queries the response was YES. [2024-06-27 17:50:48,037 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25967 conditions, 5445 events. 3295/5445 cut-off events. For 73036/73048 co-relation queries the response was YES. Maximal size of possible extension queue 326. Compared 36728 event pairs, 1200 based on Foata normal form. 9/5404 useless extension candidates. Maximal degree in co-relation 25885. Up to 4867 conditions per place. [2024-06-27 17:50:48,058 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 188 selfloop transitions, 24 changer transitions 0/225 dead transitions. [2024-06-27 17:50:48,058 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 225 transitions, 2631 flow [2024-06-27 17:50:48,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:50:48,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:50:48,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 169 transitions. [2024-06-27 17:50:48,059 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6259259259259259 [2024-06-27 17:50:48,059 INFO L175 Difference]: Start difference. First operand has 174 places, 189 transitions, 1966 flow. Second operand 6 states and 169 transitions. [2024-06-27 17:50:48,060 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 225 transitions, 2631 flow [2024-06-27 17:50:48,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 225 transitions, 2546 flow, removed 14 selfloop flow, removed 3 redundant places. [2024-06-27 17:50:48,236 INFO L231 Difference]: Finished difference. Result has 180 places, 197 transitions, 2049 flow [2024-06-27 17:50:48,237 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1885, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2049, PETRI_PLACES=180, PETRI_TRANSITIONS=197} [2024-06-27 17:50:48,237 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 131 predicate places. [2024-06-27 17:50:48,237 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 197 transitions, 2049 flow [2024-06-27 17:50:48,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.333333333333332) internal successors, (116), 6 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:48,238 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:48,238 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:48,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-27 17:50:48,238 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:50:48,238 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:48,238 INFO L85 PathProgramCache]: Analyzing trace with hash -1925650907, now seen corresponding path program 2 times [2024-06-27 17:50:48,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:48,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591555072] [2024-06-27 17:50:48,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:48,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:48,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:48,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:48,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:48,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591555072] [2024-06-27 17:50:48,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591555072] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:48,303 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:48,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:50:48,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695055743] [2024-06-27 17:50:48,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:48,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:50:48,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:48,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:50:48,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:50:48,331 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:50:48,331 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 197 transitions, 2049 flow. Second operand has 6 states, 6 states have (on average 19.333333333333332) internal successors, (116), 6 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:48,332 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:48,332 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:50:48,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:48,913 INFO L124 PetriNetUnfolderBase]: 3306/5354 cut-off events. [2024-06-27 17:50:48,914 INFO L125 PetriNetUnfolderBase]: For 75409/75424 co-relation queries the response was YES. [2024-06-27 17:50:48,944 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25944 conditions, 5354 events. 3306/5354 cut-off events. For 75409/75424 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 35367 event pairs, 665 based on Foata normal form. 11/5356 useless extension candidates. Maximal degree in co-relation 25858. Up to 4879 conditions per place. [2024-06-27 17:50:48,962 INFO L140 encePairwiseOnDemand]: 38/45 looper letters, 185 selfloop transitions, 27 changer transitions 0/225 dead transitions. [2024-06-27 17:50:48,962 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 225 transitions, 2663 flow [2024-06-27 17:50:48,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:50:48,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:50:48,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 146 transitions. [2024-06-27 17:50:48,963 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6488888888888888 [2024-06-27 17:50:48,963 INFO L175 Difference]: Start difference. First operand has 180 places, 197 transitions, 2049 flow. Second operand 5 states and 146 transitions. [2024-06-27 17:50:48,963 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 225 transitions, 2663 flow [2024-06-27 17:50:49,173 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 225 transitions, 2633 flow, removed 4 selfloop flow, removed 1 redundant places. [2024-06-27 17:50:49,176 INFO L231 Difference]: Finished difference. Result has 184 places, 200 transitions, 2119 flow [2024-06-27 17:50:49,176 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2022, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2119, PETRI_PLACES=184, PETRI_TRANSITIONS=200} [2024-06-27 17:50:49,176 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 135 predicate places. [2024-06-27 17:50:49,176 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 200 transitions, 2119 flow [2024-06-27 17:50:49,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.333333333333332) internal successors, (116), 6 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:49,177 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:49,177 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:49,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-27 17:50:49,177 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:50:49,177 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:49,178 INFO L85 PathProgramCache]: Analyzing trace with hash -1925639747, now seen corresponding path program 3 times [2024-06-27 17:50:49,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:49,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861065663] [2024-06-27 17:50:49,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:49,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:49,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:49,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:49,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:49,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861065663] [2024-06-27 17:50:49,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861065663] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:49,246 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:49,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:50:49,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867366767] [2024-06-27 17:50:49,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:49,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:50:49,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:49,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:50:49,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:50:49,275 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:50:49,275 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 200 transitions, 2119 flow. Second operand has 6 states, 6 states have (on average 19.333333333333332) internal successors, (116), 6 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:49,275 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:49,275 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:50:49,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:49,805 INFO L124 PetriNetUnfolderBase]: 3303/5429 cut-off events. [2024-06-27 17:50:49,805 INFO L125 PetriNetUnfolderBase]: For 78550/78550 co-relation queries the response was YES. [2024-06-27 17:50:49,838 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26065 conditions, 5429 events. 3303/5429 cut-off events. For 78550/78550 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 36414 event pairs, 1219 based on Foata normal form. 1/5392 useless extension candidates. Maximal degree in co-relation 25977. Up to 4876 conditions per place. [2024-06-27 17:50:49,857 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 177 selfloop transitions, 29 changer transitions 0/219 dead transitions. [2024-06-27 17:50:49,857 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 219 transitions, 2602 flow [2024-06-27 17:50:49,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:50:49,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:50:49,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 140 transitions. [2024-06-27 17:50:49,859 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6222222222222222 [2024-06-27 17:50:49,859 INFO L175 Difference]: Start difference. First operand has 184 places, 200 transitions, 2119 flow. Second operand 5 states and 140 transitions. [2024-06-27 17:50:49,859 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 219 transitions, 2602 flow [2024-06-27 17:50:50,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 219 transitions, 2563 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-06-27 17:50:50,113 INFO L231 Difference]: Finished difference. Result has 187 places, 202 transitions, 2179 flow [2024-06-27 17:50:50,113 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2082, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2179, PETRI_PLACES=187, PETRI_TRANSITIONS=202} [2024-06-27 17:50:50,113 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 138 predicate places. [2024-06-27 17:50:50,113 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 202 transitions, 2179 flow [2024-06-27 17:50:50,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.333333333333332) internal successors, (116), 6 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:50,114 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:50,114 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:50,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-27 17:50:50,114 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:50:50,115 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:50,115 INFO L85 PathProgramCache]: Analyzing trace with hash 1999508657, now seen corresponding path program 1 times [2024-06-27 17:50:50,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:50,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851168187] [2024-06-27 17:50:50,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:50,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:50,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:50,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:50,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:50,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851168187] [2024-06-27 17:50:50,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851168187] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:50,184 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:50,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:50:50,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919111805] [2024-06-27 17:50:50,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:50,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:50:50,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:50,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:50:50,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:50:50,219 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:50:50,219 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 202 transitions, 2179 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:50,219 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:50,219 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:50:50,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:50,764 INFO L124 PetriNetUnfolderBase]: 3355/5482 cut-off events. [2024-06-27 17:50:50,764 INFO L125 PetriNetUnfolderBase]: For 81204/81222 co-relation queries the response was YES. [2024-06-27 17:50:50,799 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26652 conditions, 5482 events. 3355/5482 cut-off events. For 81204/81222 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 36804 event pairs, 700 based on Foata normal form. 14/5469 useless extension candidates. Maximal degree in co-relation 26563. Up to 4733 conditions per place. [2024-06-27 17:50:50,818 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 179 selfloop transitions, 46 changer transitions 0/238 dead transitions. [2024-06-27 17:50:50,818 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 238 transitions, 2989 flow [2024-06-27 17:50:50,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:50:50,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:50:50,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 172 transitions. [2024-06-27 17:50:50,819 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6370370370370371 [2024-06-27 17:50:50,819 INFO L175 Difference]: Start difference. First operand has 187 places, 202 transitions, 2179 flow. Second operand 6 states and 172 transitions. [2024-06-27 17:50:50,819 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 238 transitions, 2989 flow [2024-06-27 17:50:51,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 238 transitions, 2951 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-06-27 17:50:51,027 INFO L231 Difference]: Finished difference. Result has 192 places, 213 transitions, 2388 flow [2024-06-27 17:50:51,028 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2141, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2388, PETRI_PLACES=192, PETRI_TRANSITIONS=213} [2024-06-27 17:50:51,028 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 143 predicate places. [2024-06-27 17:50:51,028 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 213 transitions, 2388 flow [2024-06-27 17:50:51,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:51,028 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:51,029 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:51,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-27 17:50:51,029 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:50:51,029 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:51,029 INFO L85 PathProgramCache]: Analyzing trace with hash -1264180215, now seen corresponding path program 2 times [2024-06-27 17:50:51,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:51,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867201553] [2024-06-27 17:50:51,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:51,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:51,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:51,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:51,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:51,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867201553] [2024-06-27 17:50:51,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867201553] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:51,112 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:51,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:50:51,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502189026] [2024-06-27 17:50:51,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:51,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:50:51,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:51,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:50:51,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:50:51,153 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:50:51,153 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 213 transitions, 2388 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:51,153 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:51,153 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:50:51,153 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:51,741 INFO L124 PetriNetUnfolderBase]: 3379/5524 cut-off events. [2024-06-27 17:50:51,741 INFO L125 PetriNetUnfolderBase]: For 87798/87816 co-relation queries the response was YES. [2024-06-27 17:50:51,775 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27715 conditions, 5524 events. 3379/5524 cut-off events. For 87798/87816 co-relation queries the response was YES. Maximal size of possible extension queue 338. Compared 37162 event pairs, 702 based on Foata normal form. 14/5511 useless extension candidates. Maximal degree in co-relation 27623. Up to 4806 conditions per place. [2024-06-27 17:50:51,793 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 183 selfloop transitions, 42 changer transitions 0/238 dead transitions. [2024-06-27 17:50:51,793 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 238 transitions, 3048 flow [2024-06-27 17:50:51,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:50:51,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:50:51,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 146 transitions. [2024-06-27 17:50:51,794 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6488888888888888 [2024-06-27 17:50:51,794 INFO L175 Difference]: Start difference. First operand has 192 places, 213 transitions, 2388 flow. Second operand 5 states and 146 transitions. [2024-06-27 17:50:51,794 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 238 transitions, 3048 flow [2024-06-27 17:50:51,992 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 238 transitions, 2959 flow, removed 34 selfloop flow, removed 1 redundant places. [2024-06-27 17:50:51,995 INFO L231 Difference]: Finished difference. Result has 197 places, 218 transitions, 2492 flow [2024-06-27 17:50:51,995 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2305, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2492, PETRI_PLACES=197, PETRI_TRANSITIONS=218} [2024-06-27 17:50:51,995 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 148 predicate places. [2024-06-27 17:50:51,995 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 218 transitions, 2492 flow [2024-06-27 17:50:51,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:51,995 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:51,996 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:51,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-27 17:50:51,996 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:50:51,996 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:51,996 INFO L85 PathProgramCache]: Analyzing trace with hash -1264174635, now seen corresponding path program 3 times [2024-06-27 17:50:51,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:51,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987486239] [2024-06-27 17:50:51,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:51,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:52,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:52,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:52,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:52,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987486239] [2024-06-27 17:50:52,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987486239] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:52,071 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:52,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:50:52,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087737702] [2024-06-27 17:50:52,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:52,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:50:52,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:52,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:50:52,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:50:52,103 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:50:52,104 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 218 transitions, 2492 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:52,104 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:52,104 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:50:52,104 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:52,720 INFO L124 PetriNetUnfolderBase]: 3387/5535 cut-off events. [2024-06-27 17:50:52,721 INFO L125 PetriNetUnfolderBase]: For 91291/91309 co-relation queries the response was YES. [2024-06-27 17:50:52,757 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28138 conditions, 5535 events. 3387/5535 cut-off events. For 91291/91309 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 37163 event pairs, 690 based on Foata normal form. 14/5531 useless extension candidates. Maximal degree in co-relation 28043. Up to 4816 conditions per place. [2024-06-27 17:50:52,776 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 181 selfloop transitions, 53 changer transitions 0/247 dead transitions. [2024-06-27 17:50:52,776 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 247 transitions, 3155 flow [2024-06-27 17:50:52,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:50:52,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:50:52,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 195 transitions. [2024-06-27 17:50:52,777 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-06-27 17:50:52,778 INFO L175 Difference]: Start difference. First operand has 197 places, 218 transitions, 2492 flow. Second operand 7 states and 195 transitions. [2024-06-27 17:50:52,778 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 247 transitions, 3155 flow [2024-06-27 17:50:53,002 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 247 transitions, 3027 flow, removed 22 selfloop flow, removed 3 redundant places. [2024-06-27 17:50:53,005 INFO L231 Difference]: Finished difference. Result has 201 places, 222 transitions, 2538 flow [2024-06-27 17:50:53,006 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2372, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2538, PETRI_PLACES=201, PETRI_TRANSITIONS=222} [2024-06-27 17:50:53,006 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 152 predicate places. [2024-06-27 17:50:53,006 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 222 transitions, 2538 flow [2024-06-27 17:50:53,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:53,006 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:53,006 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:53,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-27 17:50:53,007 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:50:53,007 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:53,007 INFO L85 PathProgramCache]: Analyzing trace with hash -1075376600, now seen corresponding path program 1 times [2024-06-27 17:50:53,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:53,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564201526] [2024-06-27 17:50:53,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:53,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:53,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:53,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:53,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:53,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564201526] [2024-06-27 17:50:53,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564201526] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:53,082 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:53,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:50:53,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797918676] [2024-06-27 17:50:53,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:53,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:50:53,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:53,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:50:53,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:50:53,122 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:50:53,123 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 222 transitions, 2538 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:53,124 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:53,125 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:50:53,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:53,830 INFO L124 PetriNetUnfolderBase]: 3426/5603 cut-off events. [2024-06-27 17:50:53,830 INFO L125 PetriNetUnfolderBase]: For 95813/95816 co-relation queries the response was YES. [2024-06-27 17:50:53,861 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28690 conditions, 5603 events. 3426/5603 cut-off events. For 95813/95816 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 37693 event pairs, 693 based on Foata normal form. 1/5576 useless extension candidates. Maximal degree in co-relation 28594. Up to 4799 conditions per place. [2024-06-27 17:50:53,880 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 184 selfloop transitions, 67 changer transitions 0/264 dead transitions. [2024-06-27 17:50:53,880 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 264 transitions, 3381 flow [2024-06-27 17:50:53,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:50:53,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:50:53,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 207 transitions. [2024-06-27 17:50:53,882 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6571428571428571 [2024-06-27 17:50:53,882 INFO L175 Difference]: Start difference. First operand has 201 places, 222 transitions, 2538 flow. Second operand 7 states and 207 transitions. [2024-06-27 17:50:53,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 264 transitions, 3381 flow [2024-06-27 17:50:54,091 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 264 transitions, 3235 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-27 17:50:54,094 INFO L231 Difference]: Finished difference. Result has 203 places, 229 transitions, 2627 flow [2024-06-27 17:50:54,094 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2400, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2627, PETRI_PLACES=203, PETRI_TRANSITIONS=229} [2024-06-27 17:50:54,095 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 154 predicate places. [2024-06-27 17:50:54,095 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 229 transitions, 2627 flow [2024-06-27 17:50:54,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:54,095 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:54,095 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:54,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-27 17:50:54,095 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:50:54,096 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:54,096 INFO L85 PathProgramCache]: Analyzing trace with hash -607767512, now seen corresponding path program 2 times [2024-06-27 17:50:54,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:54,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682174837] [2024-06-27 17:50:54,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:54,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:54,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:54,182 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:54,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:54,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682174837] [2024-06-27 17:50:54,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682174837] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:54,182 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:54,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:50:54,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793527624] [2024-06-27 17:50:54,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:54,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:50:54,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:54,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:50:54,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:50:54,223 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:50:54,223 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 229 transitions, 2627 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:54,223 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:54,223 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:50:54,223 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:54,909 INFO L124 PetriNetUnfolderBase]: 3448/5760 cut-off events. [2024-06-27 17:50:54,909 INFO L125 PetriNetUnfolderBase]: For 99690/99693 co-relation queries the response was YES. [2024-06-27 17:50:54,951 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29128 conditions, 5760 events. 3448/5760 cut-off events. For 99690/99693 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 39068 event pairs, 825 based on Foata normal form. 3/5744 useless extension candidates. Maximal degree in co-relation 29031. Up to 5009 conditions per place. [2024-06-27 17:50:54,972 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 213 selfloop transitions, 39 changer transitions 0/265 dead transitions. [2024-06-27 17:50:54,973 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 265 transitions, 3288 flow [2024-06-27 17:50:54,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:50:54,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:50:54,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 198 transitions. [2024-06-27 17:50:54,974 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6285714285714286 [2024-06-27 17:50:54,974 INFO L175 Difference]: Start difference. First operand has 203 places, 229 transitions, 2627 flow. Second operand 7 states and 198 transitions. [2024-06-27 17:50:54,974 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 265 transitions, 3288 flow [2024-06-27 17:50:55,243 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 265 transitions, 3155 flow, removed 19 selfloop flow, removed 3 redundant places. [2024-06-27 17:50:55,246 INFO L231 Difference]: Finished difference. Result has 207 places, 235 transitions, 2671 flow [2024-06-27 17:50:55,246 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2506, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2671, PETRI_PLACES=207, PETRI_TRANSITIONS=235} [2024-06-27 17:50:55,246 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 158 predicate places. [2024-06-27 17:50:55,246 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 235 transitions, 2671 flow [2024-06-27 17:50:55,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:55,247 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:55,247 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:55,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-27 17:50:55,247 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:50:55,247 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:55,247 INFO L85 PathProgramCache]: Analyzing trace with hash 590217654, now seen corresponding path program 3 times [2024-06-27 17:50:55,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:55,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373033377] [2024-06-27 17:50:55,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:55,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:55,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:55,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:55,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:55,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373033377] [2024-06-27 17:50:55,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373033377] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:55,329 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:55,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:50:55,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562724240] [2024-06-27 17:50:55,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:55,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:50:55,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:55,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:50:55,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:50:55,367 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:50:55,367 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 235 transitions, 2671 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:55,367 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:55,367 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:50:55,368 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:56,046 INFO L124 PetriNetUnfolderBase]: 3506/5686 cut-off events. [2024-06-27 17:50:56,046 INFO L125 PetriNetUnfolderBase]: For 103412/103415 co-relation queries the response was YES. [2024-06-27 17:50:56,089 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29492 conditions, 5686 events. 3506/5686 cut-off events. For 103412/103415 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 38057 event pairs, 662 based on Foata normal form. 3/5676 useless extension candidates. Maximal degree in co-relation 29394. Up to 5048 conditions per place. [2024-06-27 17:50:56,108 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 215 selfloop transitions, 53 changer transitions 0/281 dead transitions. [2024-06-27 17:50:56,108 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 281 transitions, 3589 flow [2024-06-27 17:50:56,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:50:56,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:50:56,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 218 transitions. [2024-06-27 17:50:56,109 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6055555555555555 [2024-06-27 17:50:56,109 INFO L175 Difference]: Start difference. First operand has 207 places, 235 transitions, 2671 flow. Second operand 8 states and 218 transitions. [2024-06-27 17:50:56,110 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 281 transitions, 3589 flow [2024-06-27 17:50:56,423 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 281 transitions, 3471 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-27 17:50:56,426 INFO L231 Difference]: Finished difference. Result has 213 places, 250 transitions, 2924 flow [2024-06-27 17:50:56,427 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2571, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2924, PETRI_PLACES=213, PETRI_TRANSITIONS=250} [2024-06-27 17:50:56,427 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 164 predicate places. [2024-06-27 17:50:56,427 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 250 transitions, 2924 flow [2024-06-27 17:50:56,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:56,427 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:56,428 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:56,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-27 17:50:56,428 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:50:56,428 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:56,428 INFO L85 PathProgramCache]: Analyzing trace with hash -377892960, now seen corresponding path program 4 times [2024-06-27 17:50:56,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:56,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112432044] [2024-06-27 17:50:56,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:56,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:56,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:56,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:56,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:56,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112432044] [2024-06-27 17:50:56,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112432044] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:56,502 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:56,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:50:56,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244582726] [2024-06-27 17:50:56,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:56,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:50:56,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:56,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:50:56,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:50:56,530 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:50:56,531 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 250 transitions, 2924 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:56,531 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:56,531 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:50:56,531 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:57,205 INFO L124 PetriNetUnfolderBase]: 3545/5756 cut-off events. [2024-06-27 17:50:57,205 INFO L125 PetriNetUnfolderBase]: For 110010/110013 co-relation queries the response was YES. [2024-06-27 17:50:57,245 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30141 conditions, 5756 events. 3545/5756 cut-off events. For 110010/110013 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 38586 event pairs, 692 based on Foata normal form. 1/5736 useless extension candidates. Maximal degree in co-relation 30040. Up to 4874 conditions per place. [2024-06-27 17:50:57,264 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 178 selfloop transitions, 95 changer transitions 0/286 dead transitions. [2024-06-27 17:50:57,265 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 286 transitions, 3806 flow [2024-06-27 17:50:57,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:50:57,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:50:57,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 179 transitions. [2024-06-27 17:50:57,275 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.662962962962963 [2024-06-27 17:50:57,275 INFO L175 Difference]: Start difference. First operand has 213 places, 250 transitions, 2924 flow. Second operand 6 states and 179 transitions. [2024-06-27 17:50:57,275 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 286 transitions, 3806 flow [2024-06-27 17:50:57,590 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 286 transitions, 3703 flow, removed 24 selfloop flow, removed 2 redundant places. [2024-06-27 17:50:57,594 INFO L231 Difference]: Finished difference. Result has 217 places, 257 transitions, 3113 flow [2024-06-27 17:50:57,594 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2821, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3113, PETRI_PLACES=217, PETRI_TRANSITIONS=257} [2024-06-27 17:50:57,594 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 168 predicate places. [2024-06-27 17:50:57,594 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 257 transitions, 3113 flow [2024-06-27 17:50:57,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:57,595 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:57,595 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:57,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-27 17:50:57,595 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:50:57,595 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:57,595 INFO L85 PathProgramCache]: Analyzing trace with hash -720186900, now seen corresponding path program 5 times [2024-06-27 17:50:57,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:57,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681924271] [2024-06-27 17:50:57,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:57,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:57,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:57,703 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:57,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:57,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681924271] [2024-06-27 17:50:57,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681924271] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:57,703 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:57,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:50:57,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305927384] [2024-06-27 17:50:57,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:57,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:50:57,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:57,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:50:57,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:50:57,742 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:50:57,742 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 257 transitions, 3113 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:57,742 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:57,742 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:50:57,742 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:58,466 INFO L124 PetriNetUnfolderBase]: 3542/5765 cut-off events. [2024-06-27 17:50:58,466 INFO L125 PetriNetUnfolderBase]: For 114370/114373 co-relation queries the response was YES. [2024-06-27 17:50:58,507 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30421 conditions, 5765 events. 3542/5765 cut-off events. For 114370/114373 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 38787 event pairs, 664 based on Foata normal form. 3/5748 useless extension candidates. Maximal degree in co-relation 30319. Up to 5098 conditions per place. [2024-06-27 17:50:58,527 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 216 selfloop transitions, 52 changer transitions 0/281 dead transitions. [2024-06-27 17:50:58,528 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 281 transitions, 3705 flow [2024-06-27 17:50:58,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:50:58,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:50:58,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 171 transitions. [2024-06-27 17:50:58,529 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6333333333333333 [2024-06-27 17:50:58,529 INFO L175 Difference]: Start difference. First operand has 217 places, 257 transitions, 3113 flow. Second operand 6 states and 171 transitions. [2024-06-27 17:50:58,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 281 transitions, 3705 flow [2024-06-27 17:50:58,904 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 281 transitions, 3554 flow, removed 22 selfloop flow, removed 3 redundant places. [2024-06-27 17:50:58,907 INFO L231 Difference]: Finished difference. Result has 220 places, 257 transitions, 3080 flow [2024-06-27 17:50:58,908 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2962, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=257, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3080, PETRI_PLACES=220, PETRI_TRANSITIONS=257} [2024-06-27 17:50:58,908 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 171 predicate places. [2024-06-27 17:50:58,908 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 257 transitions, 3080 flow [2024-06-27 17:50:58,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:58,908 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:58,909 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:58,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-27 17:50:58,909 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:50:58,909 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:58,909 INFO L85 PathProgramCache]: Analyzing trace with hash -481363830, now seen corresponding path program 6 times [2024-06-27 17:50:58,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:58,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31704793] [2024-06-27 17:50:58,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:58,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:58,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:58,983 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 17:50:58,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:58,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31704793] [2024-06-27 17:50:58,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31704793] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:58,984 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:58,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:50:58,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568370490] [2024-06-27 17:50:58,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:58,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:50:58,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:58,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:50:58,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:50:59,020 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:50:59,020 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 257 transitions, 3080 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:59,021 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:59,021 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:50:59,021 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:59,738 INFO L124 PetriNetUnfolderBase]: 3553/5785 cut-off events. [2024-06-27 17:50:59,739 INFO L125 PetriNetUnfolderBase]: For 115530/115548 co-relation queries the response was YES. [2024-06-27 17:50:59,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30282 conditions, 5785 events. 3553/5785 cut-off events. For 115530/115548 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 39023 event pairs, 713 based on Foata normal form. 13/5764 useless extension candidates. Maximal degree in co-relation 30180. Up to 4880 conditions per place. [2024-06-27 17:50:59,797 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 193 selfloop transitions, 80 changer transitions 0/286 dead transitions. [2024-06-27 17:50:59,797 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 286 transitions, 3906 flow [2024-06-27 17:50:59,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:50:59,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:50:59,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 174 transitions. [2024-06-27 17:50:59,798 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6444444444444445 [2024-06-27 17:50:59,798 INFO L175 Difference]: Start difference. First operand has 220 places, 257 transitions, 3080 flow. Second operand 6 states and 174 transitions. [2024-06-27 17:50:59,799 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 286 transitions, 3906 flow [2024-06-27 17:51:00,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 286 transitions, 3802 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-27 17:51:00,141 INFO L231 Difference]: Finished difference. Result has 221 places, 260 transitions, 3182 flow [2024-06-27 17:51:00,141 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2976, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=257, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3182, PETRI_PLACES=221, PETRI_TRANSITIONS=260} [2024-06-27 17:51:00,142 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 172 predicate places. [2024-06-27 17:51:00,142 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 260 transitions, 3182 flow [2024-06-27 17:51:00,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:00,142 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:51:00,142 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:51:00,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-27 17:51:00,143 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:51:00,143 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:51:00,143 INFO L85 PathProgramCache]: Analyzing trace with hash -480977880, now seen corresponding path program 7 times [2024-06-27 17:51:00,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:51:00,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125393738] [2024-06-27 17:51:00,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:51:00,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:51:00,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:51:00,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:51:00,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:51:00,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125393738] [2024-06-27 17:51:00,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125393738] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:51:00,218 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:51:00,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:51:00,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513146648] [2024-06-27 17:51:00,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:51:00,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:51:00,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:51:00,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:51:00,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:51:00,255 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:51:00,256 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 260 transitions, 3182 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:00,256 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:51:00,256 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:51:00,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:51:00,953 INFO L124 PetriNetUnfolderBase]: 3545/5773 cut-off events. [2024-06-27 17:51:00,953 INFO L125 PetriNetUnfolderBase]: For 118776/118794 co-relation queries the response was YES. [2024-06-27 17:51:00,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30432 conditions, 5773 events. 3545/5773 cut-off events. For 118776/118794 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 38843 event pairs, 713 based on Foata normal form. 14/5753 useless extension candidates. Maximal degree in co-relation 30329. Up to 4872 conditions per place. [2024-06-27 17:51:01,020 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 192 selfloop transitions, 77 changer transitions 0/282 dead transitions. [2024-06-27 17:51:01,020 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 282 transitions, 3862 flow [2024-06-27 17:51:01,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:51:01,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:51:01,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 171 transitions. [2024-06-27 17:51:01,021 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6333333333333333 [2024-06-27 17:51:01,021 INFO L175 Difference]: Start difference. First operand has 221 places, 260 transitions, 3182 flow. Second operand 6 states and 171 transitions. [2024-06-27 17:51:01,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 282 transitions, 3862 flow [2024-06-27 17:51:01,397 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 282 transitions, 3635 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-27 17:51:01,401 INFO L231 Difference]: Finished difference. Result has 223 places, 260 transitions, 3117 flow [2024-06-27 17:51:01,401 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2955, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3117, PETRI_PLACES=223, PETRI_TRANSITIONS=260} [2024-06-27 17:51:01,401 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 174 predicate places. [2024-06-27 17:51:01,401 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 260 transitions, 3117 flow [2024-06-27 17:51:01,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:01,402 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:51:01,402 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:51:01,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-27 17:51:01,402 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:51:01,402 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:51:01,402 INFO L85 PathProgramCache]: Analyzing trace with hash -535130870, now seen corresponding path program 8 times [2024-06-27 17:51:01,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:51:01,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632057148] [2024-06-27 17:51:01,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:51:01,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:51:01,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:51:01,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:51:01,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:51:01,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632057148] [2024-06-27 17:51:01,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632057148] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:51:01,481 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:51:01,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:51:01,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934378191] [2024-06-27 17:51:01,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:51:01,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:51:01,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:51:01,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:51:01,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:51:01,527 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:51:01,527 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 260 transitions, 3117 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:01,528 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:51:01,528 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:51:01,528 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:51:02,344 INFO L124 PetriNetUnfolderBase]: 3533/5999 cut-off events. [2024-06-27 17:51:02,344 INFO L125 PetriNetUnfolderBase]: For 119769/119772 co-relation queries the response was YES. [2024-06-27 17:51:02,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30337 conditions, 5999 events. 3533/5999 cut-off events. For 119769/119772 co-relation queries the response was YES. Maximal size of possible extension queue 356. Compared 41434 event pairs, 888 based on Foata normal form. 6/5985 useless extension candidates. Maximal degree in co-relation 30233. Up to 4930 conditions per place. [2024-06-27 17:51:02,405 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 200 selfloop transitions, 84 changer transitions 0/297 dead transitions. [2024-06-27 17:51:02,405 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 297 transitions, 3867 flow [2024-06-27 17:51:02,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:51:02,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:51:02,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 210 transitions. [2024-06-27 17:51:02,410 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-06-27 17:51:02,410 INFO L175 Difference]: Start difference. First operand has 223 places, 260 transitions, 3117 flow. Second operand 7 states and 210 transitions. [2024-06-27 17:51:02,410 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 297 transitions, 3867 flow [2024-06-27 17:51:02,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 297 transitions, 3663 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-27 17:51:02,791 INFO L231 Difference]: Finished difference. Result has 225 places, 260 transitions, 3113 flow [2024-06-27 17:51:02,791 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2913, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3113, PETRI_PLACES=225, PETRI_TRANSITIONS=260} [2024-06-27 17:51:02,792 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 176 predicate places. [2024-06-27 17:51:02,792 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 260 transitions, 3113 flow [2024-06-27 17:51:02,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:02,792 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:51:02,792 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:51:02,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-27 17:51:02,793 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:51:02,795 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:51:02,795 INFO L85 PathProgramCache]: Analyzing trace with hash -534893720, now seen corresponding path program 9 times [2024-06-27 17:51:02,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:51:02,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118719800] [2024-06-27 17:51:02,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:51:02,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:51:02,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:51:02,876 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:51:02,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:51:02,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118719800] [2024-06-27 17:51:02,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118719800] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:51:02,876 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:51:02,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:51:02,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760975939] [2024-06-27 17:51:02,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:51:02,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:51:02,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:51:02,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:51:02,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:51:02,904 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:51:02,904 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 260 transitions, 3113 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:02,904 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:51:02,905 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:51:02,905 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:51:03,675 INFO L124 PetriNetUnfolderBase]: 3525/5745 cut-off events. [2024-06-27 17:51:03,675 INFO L125 PetriNetUnfolderBase]: For 118344/118362 co-relation queries the response was YES. [2024-06-27 17:51:03,714 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30031 conditions, 5745 events. 3525/5745 cut-off events. For 118344/118362 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 38774 event pairs, 713 based on Foata normal form. 14/5725 useless extension candidates. Maximal degree in co-relation 29926. Up to 4922 conditions per place. [2024-06-27 17:51:03,733 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 202 selfloop transitions, 66 changer transitions 0/281 dead transitions. [2024-06-27 17:51:03,734 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 281 transitions, 3699 flow [2024-06-27 17:51:03,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:51:03,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:51:03,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 149 transitions. [2024-06-27 17:51:03,744 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6622222222222223 [2024-06-27 17:51:03,745 INFO L175 Difference]: Start difference. First operand has 225 places, 260 transitions, 3113 flow. Second operand 5 states and 149 transitions. [2024-06-27 17:51:03,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 281 transitions, 3699 flow [2024-06-27 17:51:04,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 281 transitions, 3434 flow, removed 13 selfloop flow, removed 9 redundant places. [2024-06-27 17:51:04,149 INFO L231 Difference]: Finished difference. Result has 221 places, 260 transitions, 2993 flow [2024-06-27 17:51:04,149 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2848, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2993, PETRI_PLACES=221, PETRI_TRANSITIONS=260} [2024-06-27 17:51:04,150 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 172 predicate places. [2024-06-27 17:51:04,150 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 260 transitions, 2993 flow [2024-06-27 17:51:04,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:04,150 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:51:04,150 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:51:04,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-27 17:51:04,150 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:51:04,151 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:51:04,151 INFO L85 PathProgramCache]: Analyzing trace with hash -987839648, now seen corresponding path program 1 times [2024-06-27 17:51:04,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:51:04,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763939694] [2024-06-27 17:51:04,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:51:04,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:51:04,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:51:04,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:51:04,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:51:04,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763939694] [2024-06-27 17:51:04,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763939694] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:51:04,221 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:51:04,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:51:04,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129174694] [2024-06-27 17:51:04,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:51:04,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:51:04,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:51:04,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:51:04,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:51:04,253 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 17:51:04,253 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 260 transitions, 2993 flow. Second operand has 6 states, 6 states have (on average 20.333333333333332) internal successors, (122), 6 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:04,253 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:51:04,253 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 17:51:04,253 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:51:04,902 INFO L124 PetriNetUnfolderBase]: 3432/5787 cut-off events. [2024-06-27 17:51:04,902 INFO L125 PetriNetUnfolderBase]: For 109799/109849 co-relation queries the response was YES. [2024-06-27 17:51:04,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29217 conditions, 5787 events. 3432/5787 cut-off events. For 109799/109849 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 40082 event pairs, 836 based on Foata normal form. 48/5781 useless extension candidates. Maximal degree in co-relation 29113. Up to 4910 conditions per place. [2024-06-27 17:51:04,961 INFO L140 encePairwiseOnDemand]: 38/45 looper letters, 214 selfloop transitions, 43 changer transitions 0/284 dead transitions. [2024-06-27 17:51:04,961 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 284 transitions, 3587 flow [2024-06-27 17:51:04,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:51:04,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:51:04,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 149 transitions. [2024-06-27 17:51:04,962 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6622222222222223 [2024-06-27 17:51:04,962 INFO L175 Difference]: Start difference. First operand has 221 places, 260 transitions, 2993 flow. Second operand 5 states and 149 transitions. [2024-06-27 17:51:04,962 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 284 transitions, 3587 flow [2024-06-27 17:51:05,280 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 284 transitions, 3449 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-06-27 17:51:05,283 INFO L231 Difference]: Finished difference. Result has 221 places, 262 transitions, 2980 flow [2024-06-27 17:51:05,283 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2855, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2980, PETRI_PLACES=221, PETRI_TRANSITIONS=262} [2024-06-27 17:51:05,284 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 172 predicate places. [2024-06-27 17:51:05,284 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 262 transitions, 2980 flow [2024-06-27 17:51:05,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.333333333333332) internal successors, (122), 6 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:05,284 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:51:05,284 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:51:05,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-27 17:51:05,285 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:51:05,285 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:51:05,285 INFO L85 PathProgramCache]: Analyzing trace with hash -973554848, now seen corresponding path program 2 times [2024-06-27 17:51:05,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:51:05,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921048160] [2024-06-27 17:51:05,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:51:05,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:51:05,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:51:05,350 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 17:51:05,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:51:05,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921048160] [2024-06-27 17:51:05,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921048160] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:51:05,350 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:51:05,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:51:05,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508237715] [2024-06-27 17:51:05,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:51:05,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:51:05,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:51:05,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:51:05,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:51:05,373 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 17:51:05,374 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 262 transitions, 2980 flow. Second operand has 6 states, 6 states have (on average 20.333333333333332) internal successors, (122), 6 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:05,374 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:51:05,374 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 17:51:05,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:51:06,057 INFO L124 PetriNetUnfolderBase]: 3432/5610 cut-off events. [2024-06-27 17:51:06,058 INFO L125 PetriNetUnfolderBase]: For 106015/106051 co-relation queries the response was YES. [2024-06-27 17:51:06,094 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28838 conditions, 5610 events. 3432/5610 cut-off events. For 106015/106051 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 37969 event pairs, 648 based on Foata normal form. 38/5575 useless extension candidates. Maximal degree in co-relation 28734. Up to 4806 conditions per place. [2024-06-27 17:51:06,113 INFO L140 encePairwiseOnDemand]: 39/45 looper letters, 219 selfloop transitions, 35 changer transitions 0/281 dead transitions. [2024-06-27 17:51:06,113 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 281 transitions, 3558 flow [2024-06-27 17:51:06,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:51:06,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:51:06,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 142 transitions. [2024-06-27 17:51:06,115 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6311111111111111 [2024-06-27 17:51:06,115 INFO L175 Difference]: Start difference. First operand has 221 places, 262 transitions, 2980 flow. Second operand 5 states and 142 transitions. [2024-06-27 17:51:06,115 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 281 transitions, 3558 flow [2024-06-27 17:51:06,467 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 281 transitions, 3453 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-27 17:51:06,470 INFO L231 Difference]: Finished difference. Result has 223 places, 264 transitions, 2986 flow [2024-06-27 17:51:06,470 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2875, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2986, PETRI_PLACES=223, PETRI_TRANSITIONS=264} [2024-06-27 17:51:06,471 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 174 predicate places. [2024-06-27 17:51:06,471 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 264 transitions, 2986 flow [2024-06-27 17:51:06,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.333333333333332) internal successors, (122), 6 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:06,471 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:51:06,471 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:51:06,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-27 17:51:06,471 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:51:06,472 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:51:06,472 INFO L85 PathProgramCache]: Analyzing trace with hash -353873272, now seen corresponding path program 1 times [2024-06-27 17:51:06,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:51:06,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236854355] [2024-06-27 17:51:06,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:51:06,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:51:06,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:51:06,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:51:06,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:51:06,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236854355] [2024-06-27 17:51:06,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236854355] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:51:06,552 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:51:06,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:51:06,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224455395] [2024-06-27 17:51:06,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:51:06,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:51:06,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:51:06,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:51:06,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:51:06,597 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:51:06,597 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 264 transitions, 2986 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:06,597 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:51:06,597 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:51:06,597 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:51:07,278 INFO L124 PetriNetUnfolderBase]: 3569/5776 cut-off events. [2024-06-27 17:51:07,278 INFO L125 PetriNetUnfolderBase]: For 105840/105843 co-relation queries the response was YES. [2024-06-27 17:51:07,321 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29794 conditions, 5776 events. 3569/5776 cut-off events. For 105840/105843 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 38807 event pairs, 607 based on Foata normal form. 4/5771 useless extension candidates. Maximal degree in co-relation 29689. Up to 5239 conditions per place. [2024-06-27 17:51:07,340 INFO L140 encePairwiseOnDemand]: 38/45 looper letters, 259 selfloop transitions, 23 changer transitions 0/295 dead transitions. [2024-06-27 17:51:07,341 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 295 transitions, 3784 flow [2024-06-27 17:51:07,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:51:07,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:51:07,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 168 transitions. [2024-06-27 17:51:07,342 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6222222222222222 [2024-06-27 17:51:07,342 INFO L175 Difference]: Start difference. First operand has 223 places, 264 transitions, 2986 flow. Second operand 6 states and 168 transitions. [2024-06-27 17:51:07,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 295 transitions, 3784 flow [2024-06-27 17:51:07,702 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 295 transitions, 3689 flow, removed 14 selfloop flow, removed 3 redundant places. [2024-06-27 17:51:07,705 INFO L231 Difference]: Finished difference. Result has 226 places, 268 transitions, 3026 flow [2024-06-27 17:51:07,706 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2891, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=243, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3026, PETRI_PLACES=226, PETRI_TRANSITIONS=268} [2024-06-27 17:51:07,706 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 177 predicate places. [2024-06-27 17:51:07,706 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 268 transitions, 3026 flow [2024-06-27 17:51:07,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:07,706 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:51:07,707 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:51:07,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-27 17:51:07,707 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:51:07,707 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:51:07,707 INFO L85 PathProgramCache]: Analyzing trace with hash -480968952, now seen corresponding path program 2 times [2024-06-27 17:51:07,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:51:07,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705448404] [2024-06-27 17:51:07,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:51:07,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:51:07,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:51:07,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:51:07,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:51:07,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705448404] [2024-06-27 17:51:07,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705448404] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:51:07,790 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:51:07,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:51:07,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417385476] [2024-06-27 17:51:07,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:51:07,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:51:07,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:51:07,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:51:07,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:51:07,830 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:51:07,830 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 268 transitions, 3026 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:07,830 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:51:07,830 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:51:07,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:51:08,512 INFO L124 PetriNetUnfolderBase]: 3587/5892 cut-off events. [2024-06-27 17:51:08,512 INFO L125 PetriNetUnfolderBase]: For 110690/110693 co-relation queries the response was YES. [2024-06-27 17:51:08,555 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30005 conditions, 5892 events. 3587/5892 cut-off events. For 110690/110693 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 40104 event pairs, 1268 based on Foata normal form. 4/5865 useless extension candidates. Maximal degree in co-relation 29899. Up to 5316 conditions per place. [2024-06-27 17:51:08,576 INFO L140 encePairwiseOnDemand]: 38/45 looper letters, 259 selfloop transitions, 20 changer transitions 0/292 dead transitions. [2024-06-27 17:51:08,577 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 292 transitions, 3678 flow [2024-06-27 17:51:08,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:51:08,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:51:08,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 163 transitions. [2024-06-27 17:51:08,578 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6037037037037037 [2024-06-27 17:51:08,578 INFO L175 Difference]: Start difference. First operand has 226 places, 268 transitions, 3026 flow. Second operand 6 states and 163 transitions. [2024-06-27 17:51:08,578 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 292 transitions, 3678 flow [2024-06-27 17:51:09,005 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 292 transitions, 3595 flow, removed 32 selfloop flow, removed 2 redundant places. [2024-06-27 17:51:09,009 INFO L231 Difference]: Finished difference. Result has 230 places, 270 transitions, 3036 flow [2024-06-27 17:51:09,009 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2957, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3036, PETRI_PLACES=230, PETRI_TRANSITIONS=270} [2024-06-27 17:51:09,009 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 181 predicate places. [2024-06-27 17:51:09,009 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 270 transitions, 3036 flow [2024-06-27 17:51:09,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:09,010 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:51:09,010 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:51:09,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-27 17:51:09,010 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:51:09,010 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:51:09,011 INFO L85 PathProgramCache]: Analyzing trace with hash -534884792, now seen corresponding path program 3 times [2024-06-27 17:51:09,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:51:09,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334122751] [2024-06-27 17:51:09,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:51:09,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:51:09,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:51:09,100 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 17:51:09,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:51:09,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334122751] [2024-06-27 17:51:09,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334122751] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:51:09,101 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:51:09,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:51:09,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44284171] [2024-06-27 17:51:09,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:51:09,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:51:09,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:51:09,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:51:09,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:51:09,145 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:51:09,145 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 270 transitions, 3036 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:09,145 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:51:09,145 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:51:09,145 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:51:09,878 INFO L124 PetriNetUnfolderBase]: 3582/5863 cut-off events. [2024-06-27 17:51:09,879 INFO L125 PetriNetUnfolderBase]: For 111158/111161 co-relation queries the response was YES. [2024-06-27 17:51:09,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29776 conditions, 5863 events. 3582/5863 cut-off events. For 111158/111161 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 39782 event pairs, 1216 based on Foata normal form. 4/5834 useless extension candidates. Maximal degree in co-relation 29668. Up to 5290 conditions per place. [2024-06-27 17:51:09,937 INFO L140 encePairwiseOnDemand]: 38/45 looper letters, 260 selfloop transitions, 19 changer transitions 0/292 dead transitions. [2024-06-27 17:51:09,938 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 292 transitions, 3646 flow [2024-06-27 17:51:09,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:51:09,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:51:09,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 144 transitions. [2024-06-27 17:51:09,939 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.64 [2024-06-27 17:51:09,939 INFO L175 Difference]: Start difference. First operand has 230 places, 270 transitions, 3036 flow. Second operand 5 states and 144 transitions. [2024-06-27 17:51:09,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 292 transitions, 3646 flow [2024-06-27 17:51:10,407 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 292 transitions, 3567 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-27 17:51:10,411 INFO L231 Difference]: Finished difference. Result has 231 places, 270 transitions, 3003 flow [2024-06-27 17:51:10,411 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2957, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3003, PETRI_PLACES=231, PETRI_TRANSITIONS=270} [2024-06-27 17:51:10,411 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 182 predicate places. [2024-06-27 17:51:10,411 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 270 transitions, 3003 flow [2024-06-27 17:51:10,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:10,412 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:51:10,412 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:51:10,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-27 17:51:10,412 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:51:10,412 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:51:10,413 INFO L85 PathProgramCache]: Analyzing trace with hash -1220229186, now seen corresponding path program 1 times [2024-06-27 17:51:10,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:51:10,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540650510] [2024-06-27 17:51:10,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:51:10,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:51:10,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:51:10,510 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:51:10,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:51:10,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540650510] [2024-06-27 17:51:10,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540650510] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:51:10,510 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:51:10,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:51:10,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3334466] [2024-06-27 17:51:10,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:51:10,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 17:51:10,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:51:10,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 17:51:10,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-06-27 17:51:10,543 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 45 [2024-06-27 17:51:10,543 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 270 transitions, 3003 flow. Second operand has 5 states, 5 states have (on average 26.6) internal successors, (133), 5 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:10,543 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:51:10,543 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 45 [2024-06-27 17:51:10,543 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:51:11,241 INFO L124 PetriNetUnfolderBase]: 2732/5476 cut-off events. [2024-06-27 17:51:11,241 INFO L125 PetriNetUnfolderBase]: For 51564/52108 co-relation queries the response was YES. [2024-06-27 17:51:11,288 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23673 conditions, 5476 events. 2732/5476 cut-off events. For 51564/52108 co-relation queries the response was YES. Maximal size of possible extension queue 458. Compared 46564 event pairs, 775 based on Foata normal form. 247/5223 useless extension candidates. Maximal degree in co-relation 23564. Up to 2396 conditions per place. [2024-06-27 17:51:11,305 INFO L140 encePairwiseOnDemand]: 39/45 looper letters, 59 selfloop transitions, 19 changer transitions 117/396 dead transitions. [2024-06-27 17:51:11,305 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 396 transitions, 4649 flow [2024-06-27 17:51:11,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:51:11,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:51:11,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 218 transitions. [2024-06-27 17:51:11,306 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.692063492063492 [2024-06-27 17:51:11,306 INFO L175 Difference]: Start difference. First operand has 231 places, 270 transitions, 3003 flow. Second operand 7 states and 218 transitions. [2024-06-27 17:51:11,306 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 396 transitions, 4649 flow [2024-06-27 17:51:11,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 396 transitions, 4544 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-27 17:51:11,602 INFO L231 Difference]: Finished difference. Result has 238 places, 270 transitions, 3025 flow [2024-06-27 17:51:11,603 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2958, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3025, PETRI_PLACES=238, PETRI_TRANSITIONS=270} [2024-06-27 17:51:11,603 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 189 predicate places. [2024-06-27 17:51:11,603 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 270 transitions, 3025 flow [2024-06-27 17:51:11,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 26.6) internal successors, (133), 5 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:11,604 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:51:11,604 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:51:11,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-27 17:51:11,604 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:51:11,604 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:51:11,604 INFO L85 PathProgramCache]: Analyzing trace with hash 1095325540, now seen corresponding path program 1 times [2024-06-27 17:51:11,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:51:11,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445312836] [2024-06-27 17:51:11,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:51:11,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:51:11,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:51:11,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:51:11,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:51:11,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445312836] [2024-06-27 17:51:11,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445312836] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:51:11,699 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:51:11,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:51:11,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374881468] [2024-06-27 17:51:11,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:51:11,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:51:11,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:51:11,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:51:11,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:51:11,759 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:51:11,760 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 270 transitions, 3025 flow. Second operand has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:11,760 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:51:11,760 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:51:11,760 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:51:12,642 INFO L124 PetriNetUnfolderBase]: 3664/6073 cut-off events. [2024-06-27 17:51:12,642 INFO L125 PetriNetUnfolderBase]: For 128110/128125 co-relation queries the response was YES. [2024-06-27 17:51:12,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31260 conditions, 6073 events. 3664/6073 cut-off events. For 128110/128125 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 41753 event pairs, 1085 based on Foata normal form. 16/6026 useless extension candidates. Maximal degree in co-relation 31146. Up to 5072 conditions per place. [2024-06-27 17:51:12,707 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 268 selfloop transitions, 35 changer transitions 0/316 dead transitions. [2024-06-27 17:51:12,708 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 316 transitions, 3933 flow [2024-06-27 17:51:12,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:51:12,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:51:12,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 200 transitions. [2024-06-27 17:51:12,709 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6349206349206349 [2024-06-27 17:51:12,709 INFO L175 Difference]: Start difference. First operand has 238 places, 270 transitions, 3025 flow. Second operand 7 states and 200 transitions. [2024-06-27 17:51:12,709 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 316 transitions, 3933 flow [2024-06-27 17:51:13,138 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 316 transitions, 3867 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-27 17:51:13,142 INFO L231 Difference]: Finished difference. Result has 237 places, 275 transitions, 3126 flow [2024-06-27 17:51:13,142 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2979, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3126, PETRI_PLACES=237, PETRI_TRANSITIONS=275} [2024-06-27 17:51:13,142 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 188 predicate places. [2024-06-27 17:51:13,143 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 275 transitions, 3126 flow [2024-06-27 17:51:13,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:13,143 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:51:13,143 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:51:13,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-27 17:51:13,143 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:51:13,144 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:51:13,144 INFO L85 PathProgramCache]: Analyzing trace with hash 1226959430, now seen corresponding path program 2 times [2024-06-27 17:51:13,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:51:13,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631618907] [2024-06-27 17:51:13,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:51:13,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:51:13,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:51:13,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:51:13,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:51:13,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631618907] [2024-06-27 17:51:13,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631618907] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:51:13,234 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:51:13,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:51:13,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262656109] [2024-06-27 17:51:13,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:51:13,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:51:13,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:51:13,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:51:13,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:51:13,276 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:51:13,277 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 275 transitions, 3126 flow. Second operand has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:13,277 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:51:13,277 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:51:13,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:51:14,191 INFO L124 PetriNetUnfolderBase]: 3810/6323 cut-off events. [2024-06-27 17:51:14,191 INFO L125 PetriNetUnfolderBase]: For 143735/143750 co-relation queries the response was YES. [2024-06-27 17:51:14,247 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32327 conditions, 6323 events. 3810/6323 cut-off events. For 143735/143750 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 43978 event pairs, 1302 based on Foata normal form. 16/6270 useless extension candidates. Maximal degree in co-relation 32214. Up to 5446 conditions per place. [2024-06-27 17:51:14,273 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 270 selfloop transitions, 33 changer transitions 0/316 dead transitions. [2024-06-27 17:51:14,273 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 316 transitions, 3998 flow [2024-06-27 17:51:14,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:51:14,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:51:14,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 197 transitions. [2024-06-27 17:51:14,274 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6253968253968254 [2024-06-27 17:51:14,274 INFO L175 Difference]: Start difference. First operand has 237 places, 275 transitions, 3126 flow. Second operand 7 states and 197 transitions. [2024-06-27 17:51:14,274 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 316 transitions, 3998 flow [2024-06-27 17:51:14,788 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 316 transitions, 3956 flow, removed 5 selfloop flow, removed 2 redundant places. [2024-06-27 17:51:14,792 INFO L231 Difference]: Finished difference. Result has 243 places, 279 transitions, 3208 flow [2024-06-27 17:51:14,792 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=3084, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=243, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3208, PETRI_PLACES=243, PETRI_TRANSITIONS=279} [2024-06-27 17:51:14,792 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 194 predicate places. [2024-06-27 17:51:14,792 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 279 transitions, 3208 flow [2024-06-27 17:51:14,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:14,793 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:51:14,793 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:51:14,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-27 17:51:14,793 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:51:14,793 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:51:14,794 INFO L85 PathProgramCache]: Analyzing trace with hash 1227285860, now seen corresponding path program 3 times [2024-06-27 17:51:14,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:51:14,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689564072] [2024-06-27 17:51:14,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:51:14,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:51:14,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:51:14,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:51:14,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:51:14,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689564072] [2024-06-27 17:51:14,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689564072] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:51:14,912 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:51:14,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:51:14,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34049177] [2024-06-27 17:51:14,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:51:14,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:51:14,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:51:14,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:51:14,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:51:14,952 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:51:14,952 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 279 transitions, 3208 flow. Second operand has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:14,952 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:51:14,952 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:51:14,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:51:15,784 INFO L124 PetriNetUnfolderBase]: 3792/6185 cut-off events. [2024-06-27 17:51:15,784 INFO L125 PetriNetUnfolderBase]: For 140222/140237 co-relation queries the response was YES. [2024-06-27 17:51:15,833 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32079 conditions, 6185 events. 3792/6185 cut-off events. For 140222/140237 co-relation queries the response was YES. Maximal size of possible extension queue 384. Compared 42255 event pairs, 800 based on Foata normal form. 18/6173 useless extension candidates. Maximal degree in co-relation 31963. Up to 5506 conditions per place. [2024-06-27 17:51:15,854 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 268 selfloop transitions, 31 changer transitions 0/312 dead transitions. [2024-06-27 17:51:15,855 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 312 transitions, 3914 flow [2024-06-27 17:51:15,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:51:15,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:51:15,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 193 transitions. [2024-06-27 17:51:15,856 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6126984126984127 [2024-06-27 17:51:15,856 INFO L175 Difference]: Start difference. First operand has 243 places, 279 transitions, 3208 flow. Second operand 7 states and 193 transitions. [2024-06-27 17:51:15,856 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 312 transitions, 3914 flow [2024-06-27 17:51:16,386 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 312 transitions, 3874 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-27 17:51:16,390 INFO L231 Difference]: Finished difference. Result has 247 places, 279 transitions, 3235 flow [2024-06-27 17:51:16,390 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=3168, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3235, PETRI_PLACES=247, PETRI_TRANSITIONS=279} [2024-06-27 17:51:16,390 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 198 predicate places. [2024-06-27 17:51:16,390 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 279 transitions, 3235 flow [2024-06-27 17:51:16,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:16,391 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:51:16,391 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:51:16,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-27 17:51:16,391 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:51:16,391 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:51:16,391 INFO L85 PathProgramCache]: Analyzing trace with hash 1049800010, now seen corresponding path program 1 times [2024-06-27 17:51:16,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:51:16,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47419373] [2024-06-27 17:51:16,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:51:16,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:51:16,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:51:16,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:51:16,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:51:16,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47419373] [2024-06-27 17:51:16,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47419373] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:51:16,474 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:51:16,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:51:16,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998533291] [2024-06-27 17:51:16,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:51:16,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:51:16,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:51:16,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:51:16,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:51:16,511 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:51:16,512 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 279 transitions, 3235 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:16,512 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:51:16,512 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:51:16,512 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:51:17,448 INFO L124 PetriNetUnfolderBase]: 3845/6331 cut-off events. [2024-06-27 17:51:17,448 INFO L125 PetriNetUnfolderBase]: For 139984/139987 co-relation queries the response was YES. [2024-06-27 17:51:17,491 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32980 conditions, 6331 events. 3845/6331 cut-off events. For 139984/139987 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 43802 event pairs, 774 based on Foata normal form. 1/6295 useless extension candidates. Maximal degree in co-relation 32862. Up to 4904 conditions per place. [2024-06-27 17:51:17,514 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 181 selfloop transitions, 144 changer transitions 0/338 dead transitions. [2024-06-27 17:51:17,514 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 338 transitions, 4479 flow [2024-06-27 17:51:17,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:51:17,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:51:17,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 242 transitions. [2024-06-27 17:51:17,515 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6722222222222223 [2024-06-27 17:51:17,515 INFO L175 Difference]: Start difference. First operand has 247 places, 279 transitions, 3235 flow. Second operand 8 states and 242 transitions. [2024-06-27 17:51:17,515 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 338 transitions, 4479 flow [2024-06-27 17:51:17,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 338 transitions, 4418 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-06-27 17:51:17,881 INFO L231 Difference]: Finished difference. Result has 250 places, 293 transitions, 3652 flow [2024-06-27 17:51:17,881 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=3174, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3652, PETRI_PLACES=250, PETRI_TRANSITIONS=293} [2024-06-27 17:51:17,882 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 201 predicate places. [2024-06-27 17:51:17,882 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 293 transitions, 3652 flow [2024-06-27 17:51:17,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:17,883 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:51:17,883 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:51:17,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-27 17:51:17,883 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:51:17,883 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:51:17,883 INFO L85 PathProgramCache]: Analyzing trace with hash 693732454, now seen corresponding path program 1 times [2024-06-27 17:51:17,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:51:17,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383561672] [2024-06-27 17:51:17,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:51:17,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:51:17,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:51:17,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:51:17,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:51:17,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383561672] [2024-06-27 17:51:17,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383561672] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:51:17,963 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:51:17,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:51:17,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56911459] [2024-06-27 17:51:17,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:51:17,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:51:17,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:51:17,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:51:17,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:51:18,005 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:51:18,005 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 293 transitions, 3652 flow. Second operand has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:18,006 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:51:18,006 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:51:18,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:51:18,830 INFO L124 PetriNetUnfolderBase]: 3867/6324 cut-off events. [2024-06-27 17:51:18,830 INFO L125 PetriNetUnfolderBase]: For 149142/149160 co-relation queries the response was YES. [2024-06-27 17:51:18,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34459 conditions, 6324 events. 3867/6324 cut-off events. For 149142/149160 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 43580 event pairs, 783 based on Foata normal form. 13/6295 useless extension candidates. Maximal degree in co-relation 34340. Up to 5396 conditions per place. [2024-06-27 17:51:18,904 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 246 selfloop transitions, 72 changer transitions 0/331 dead transitions. [2024-06-27 17:51:18,905 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 331 transitions, 4637 flow [2024-06-27 17:51:18,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:51:18,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:51:18,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 200 transitions. [2024-06-27 17:51:18,905 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6349206349206349 [2024-06-27 17:51:18,906 INFO L175 Difference]: Start difference. First operand has 250 places, 293 transitions, 3652 flow. Second operand 7 states and 200 transitions. [2024-06-27 17:51:18,906 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 331 transitions, 4637 flow [2024-06-27 17:51:19,410 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 331 transitions, 4397 flow, removed 44 selfloop flow, removed 4 redundant places. [2024-06-27 17:51:19,414 INFO L231 Difference]: Finished difference. Result has 254 places, 299 transitions, 3631 flow [2024-06-27 17:51:19,414 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=3415, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=293, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3631, PETRI_PLACES=254, PETRI_TRANSITIONS=299} [2024-06-27 17:51:19,423 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 205 predicate places. [2024-06-27 17:51:19,423 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 299 transitions, 3631 flow [2024-06-27 17:51:19,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:19,424 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:51:19,424 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:51:19,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-27 17:51:19,424 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:51:19,424 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:51:19,424 INFO L85 PathProgramCache]: Analyzing trace with hash 1049919980, now seen corresponding path program 2 times [2024-06-27 17:51:19,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:51:19,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873525145] [2024-06-27 17:51:19,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:51:19,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:51:19,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:51:19,535 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:51:19,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:51:19,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873525145] [2024-06-27 17:51:19,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873525145] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:51:19,536 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:51:19,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:51:19,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013883641] [2024-06-27 17:51:19,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:51:19,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:51:19,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:51:19,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:51:19,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:51:19,582 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:51:19,582 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 299 transitions, 3631 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:19,582 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:51:19,582 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:51:19,583 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:51:20,450 INFO L124 PetriNetUnfolderBase]: 3878/6352 cut-off events. [2024-06-27 17:51:20,450 INFO L125 PetriNetUnfolderBase]: For 151702/151705 co-relation queries the response was YES. [2024-06-27 17:51:20,507 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34385 conditions, 6352 events. 3878/6352 cut-off events. For 151702/151705 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 43764 event pairs, 758 based on Foata normal form. 3/6323 useless extension candidates. Maximal degree in co-relation 34264. Up to 5404 conditions per place. [2024-06-27 17:51:20,533 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 241 selfloop transitions, 88 changer transitions 0/342 dead transitions. [2024-06-27 17:51:20,533 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 342 transitions, 4517 flow [2024-06-27 17:51:20,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:51:20,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:51:20,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 232 transitions. [2024-06-27 17:51:20,534 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6444444444444445 [2024-06-27 17:51:20,534 INFO L175 Difference]: Start difference. First operand has 254 places, 299 transitions, 3631 flow. Second operand 8 states and 232 transitions. [2024-06-27 17:51:20,534 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 342 transitions, 4517 flow [2024-06-27 17:51:21,036 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 342 transitions, 4344 flow, removed 17 selfloop flow, removed 4 redundant places. [2024-06-27 17:51:21,040 INFO L231 Difference]: Finished difference. Result has 258 places, 302 transitions, 3672 flow [2024-06-27 17:51:21,040 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=3458, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3672, PETRI_PLACES=258, PETRI_TRANSITIONS=302} [2024-06-27 17:51:21,040 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 209 predicate places. [2024-06-27 17:51:21,040 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 302 transitions, 3672 flow [2024-06-27 17:51:21,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:21,041 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:51:21,041 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:51:21,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-27 17:51:21,041 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:51:21,041 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:51:21,041 INFO L85 PathProgramCache]: Analyzing trace with hash -754388678, now seen corresponding path program 2 times [2024-06-27 17:51:21,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:51:21,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601492280] [2024-06-27 17:51:21,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:51:21,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:51:21,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:51:21,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:51:21,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:51:21,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601492280] [2024-06-27 17:51:21,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601492280] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:51:21,126 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:51:21,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:51:21,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793590633] [2024-06-27 17:51:21,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:51:21,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:51:21,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:51:21,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:51:21,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:51:21,170 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:51:21,171 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 302 transitions, 3672 flow. Second operand has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:21,171 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:51:21,171 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:51:21,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:51:21,992 INFO L124 PetriNetUnfolderBase]: 3950/6453 cut-off events. [2024-06-27 17:51:21,992 INFO L125 PetriNetUnfolderBase]: For 160288/160306 co-relation queries the response was YES. [2024-06-27 17:51:22,048 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35205 conditions, 6453 events. 3950/6453 cut-off events. For 160288/160306 co-relation queries the response was YES. Maximal size of possible extension queue 403. Compared 44564 event pairs, 782 based on Foata normal form. 13/6425 useless extension candidates. Maximal degree in co-relation 35084. Up to 5477 conditions per place. [2024-06-27 17:51:22,074 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 251 selfloop transitions, 86 changer transitions 0/350 dead transitions. [2024-06-27 17:51:22,074 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 350 transitions, 4957 flow [2024-06-27 17:51:22,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:51:22,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:51:22,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 199 transitions. [2024-06-27 17:51:22,075 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6317460317460317 [2024-06-27 17:51:22,075 INFO L175 Difference]: Start difference. First operand has 258 places, 302 transitions, 3672 flow. Second operand 7 states and 199 transitions. [2024-06-27 17:51:22,075 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 350 transitions, 4957 flow [2024-06-27 17:51:22,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 350 transitions, 4725 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-27 17:51:22,674 INFO L231 Difference]: Finished difference. Result has 259 places, 318 transitions, 3819 flow [2024-06-27 17:51:22,675 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=3478, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=302, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3819, PETRI_PLACES=259, PETRI_TRANSITIONS=318} [2024-06-27 17:51:22,675 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 210 predicate places. [2024-06-27 17:51:22,675 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 318 transitions, 3819 flow [2024-06-27 17:51:22,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:22,675 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:51:22,676 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:51:22,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-27 17:51:22,676 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:51:22,676 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:51:22,676 INFO L85 PathProgramCache]: Analyzing trace with hash 1054561610, now seen corresponding path program 3 times [2024-06-27 17:51:22,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:51:22,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499415633] [2024-06-27 17:51:22,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:51:22,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:51:22,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:51:22,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:51:22,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:51:22,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499415633] [2024-06-27 17:51:22,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499415633] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:51:22,771 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:51:22,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:51:22,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987554997] [2024-06-27 17:51:22,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:51:22,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:51:22,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:51:22,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:51:22,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:51:22,819 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:51:22,819 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 318 transitions, 3819 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:22,819 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:51:22,819 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:51:22,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:51:23,787 INFO L124 PetriNetUnfolderBase]: 3975/6523 cut-off events. [2024-06-27 17:51:23,787 INFO L125 PetriNetUnfolderBase]: For 166070/166073 co-relation queries the response was YES. [2024-06-27 17:51:23,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35477 conditions, 6523 events. 3975/6523 cut-off events. For 166070/166073 co-relation queries the response was YES. Maximal size of possible extension queue 407. Compared 45192 event pairs, 764 based on Foata normal form. 3/6492 useless extension candidates. Maximal degree in co-relation 35355. Up to 5485 conditions per place. [2024-06-27 17:51:23,878 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 241 selfloop transitions, 113 changer transitions 0/367 dead transitions. [2024-06-27 17:51:23,878 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 367 transitions, 4933 flow [2024-06-27 17:51:23,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 17:51:23,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 17:51:23,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 252 transitions. [2024-06-27 17:51:23,879 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6222222222222222 [2024-06-27 17:51:23,879 INFO L175 Difference]: Start difference. First operand has 259 places, 318 transitions, 3819 flow. Second operand 9 states and 252 transitions. [2024-06-27 17:51:23,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 367 transitions, 4933 flow [2024-06-27 17:51:24,434 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 367 transitions, 4824 flow, removed 7 selfloop flow, removed 2 redundant places. [2024-06-27 17:51:24,438 INFO L231 Difference]: Finished difference. Result has 267 places, 326 transitions, 4051 flow [2024-06-27 17:51:24,439 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=3710, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=318, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4051, PETRI_PLACES=267, PETRI_TRANSITIONS=326} [2024-06-27 17:51:24,439 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 218 predicate places. [2024-06-27 17:51:24,439 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 326 transitions, 4051 flow [2024-06-27 17:51:24,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:24,439 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:51:24,440 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:51:24,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-27 17:51:24,440 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:51:24,440 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:51:24,440 INFO L85 PathProgramCache]: Analyzing trace with hash -747573638, now seen corresponding path program 3 times [2024-06-27 17:51:24,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:51:24,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080135532] [2024-06-27 17:51:24,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:51:24,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:51:24,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:51:24,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:51:24,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:51:24,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080135532] [2024-06-27 17:51:24,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080135532] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:51:24,517 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:51:24,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:51:24,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404578542] [2024-06-27 17:51:24,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:51:24,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:51:24,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:51:24,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:51:24,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:51:24,549 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:51:24,549 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 326 transitions, 4051 flow. Second operand has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:24,549 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:51:24,549 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:51:24,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:51:25,472 INFO L124 PetriNetUnfolderBase]: 3972/6507 cut-off events. [2024-06-27 17:51:25,473 INFO L125 PetriNetUnfolderBase]: For 171368/171386 co-relation queries the response was YES. [2024-06-27 17:51:25,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35749 conditions, 6507 events. 3972/6507 cut-off events. For 171368/171386 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 44981 event pairs, 788 based on Foata normal form. 13/6479 useless extension candidates. Maximal degree in co-relation 35625. Up to 5508 conditions per place. [2024-06-27 17:51:25,548 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 253 selfloop transitions, 89 changer transitions 0/355 dead transitions. [2024-06-27 17:51:25,548 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 355 transitions, 5029 flow [2024-06-27 17:51:25,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:51:25,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:51:25,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 197 transitions. [2024-06-27 17:51:25,549 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6253968253968254 [2024-06-27 17:51:25,549 INFO L175 Difference]: Start difference. First operand has 267 places, 326 transitions, 4051 flow. Second operand 7 states and 197 transitions. [2024-06-27 17:51:25,549 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 355 transitions, 5029 flow [2024-06-27 17:51:26,189 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 355 transitions, 4822 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-27 17:51:26,193 INFO L231 Difference]: Finished difference. Result has 269 places, 326 transitions, 4028 flow [2024-06-27 17:51:26,193 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=3844, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=326, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4028, PETRI_PLACES=269, PETRI_TRANSITIONS=326} [2024-06-27 17:51:26,194 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 220 predicate places. [2024-06-27 17:51:26,194 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 326 transitions, 4028 flow [2024-06-27 17:51:26,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:26,194 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:51:26,194 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:51:26,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-27 17:51:26,195 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:51:26,195 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:51:26,195 INFO L85 PathProgramCache]: Analyzing trace with hash 580408484, now seen corresponding path program 4 times [2024-06-27 17:51:26,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:51:26,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920929543] [2024-06-27 17:51:26,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:51:26,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:51:26,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:51:26,286 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 17:51:26,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:51:26,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920929543] [2024-06-27 17:51:26,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920929543] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:51:26,287 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:51:26,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:51:26,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116839243] [2024-06-27 17:51:26,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:51:26,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:51:26,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:51:26,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:51:26,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:51:26,348 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:51:26,348 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 326 transitions, 4028 flow. Second operand has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:26,348 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:51:26,348 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:51:26,348 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:51:27,223 INFO L124 PetriNetUnfolderBase]: 4036/6708 cut-off events. [2024-06-27 17:51:27,224 INFO L125 PetriNetUnfolderBase]: For 188835/188850 co-relation queries the response was YES. [2024-06-27 17:51:27,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36279 conditions, 6708 events. 4036/6708 cut-off events. For 188835/188850 co-relation queries the response was YES. Maximal size of possible extension queue 415. Compared 47326 event pairs, 1355 based on Foata normal form. 18/6651 useless extension candidates. Maximal degree in co-relation 36156. Up to 5775 conditions per place. [2024-06-27 17:51:27,307 INFO L140 encePairwiseOnDemand]: 38/45 looper letters, 312 selfloop transitions, 32 changer transitions 0/357 dead transitions. [2024-06-27 17:51:27,307 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 357 transitions, 4833 flow [2024-06-27 17:51:27,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:51:27,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:51:27,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 170 transitions. [2024-06-27 17:51:27,308 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6296296296296297 [2024-06-27 17:51:27,308 INFO L175 Difference]: Start difference. First operand has 269 places, 326 transitions, 4028 flow. Second operand 6 states and 170 transitions. [2024-06-27 17:51:27,309 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 357 transitions, 4833 flow [2024-06-27 17:51:28,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 357 transitions, 4668 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-27 17:51:28,030 INFO L231 Difference]: Finished difference. Result has 270 places, 327 transitions, 3948 flow [2024-06-27 17:51:28,030 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=3863, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=326, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3948, PETRI_PLACES=270, PETRI_TRANSITIONS=327} [2024-06-27 17:51:28,030 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 221 predicate places. [2024-06-27 17:51:28,030 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 327 transitions, 3948 flow [2024-06-27 17:51:28,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:28,031 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:51:28,031 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:51:28,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-27 17:51:28,031 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:51:28,031 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:51:28,031 INFO L85 PathProgramCache]: Analyzing trace with hash 580082054, now seen corresponding path program 5 times [2024-06-27 17:51:28,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:51:28,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767965455] [2024-06-27 17:51:28,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:51:28,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:51:28,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:51:28,120 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:51:28,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:51:28,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767965455] [2024-06-27 17:51:28,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767965455] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:51:28,120 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:51:28,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:51:28,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586961866] [2024-06-27 17:51:28,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:51:28,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:51:28,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:51:28,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:51:28,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:51:28,174 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:51:28,174 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 327 transitions, 3948 flow. Second operand has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:28,174 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:51:28,174 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:51:28,174 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:51:29,209 INFO L124 PetriNetUnfolderBase]: 4082/6646 cut-off events. [2024-06-27 17:51:29,209 INFO L125 PetriNetUnfolderBase]: For 189491/189506 co-relation queries the response was YES. [2024-06-27 17:51:29,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36407 conditions, 6646 events. 4082/6646 cut-off events. For 189491/189506 co-relation queries the response was YES. Maximal size of possible extension queue 422. Compared 45832 event pairs, 648 based on Foata normal form. 16/6633 useless extension candidates. Maximal degree in co-relation 36283. Up to 5437 conditions per place. [2024-06-27 17:51:29,289 INFO L140 encePairwiseOnDemand]: 38/45 looper letters, 311 selfloop transitions, 41 changer transitions 0/365 dead transitions. [2024-06-27 17:51:29,290 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 365 transitions, 4915 flow [2024-06-27 17:51:29,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:51:29,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:51:29,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 177 transitions. [2024-06-27 17:51:29,291 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6555555555555556 [2024-06-27 17:51:29,291 INFO L175 Difference]: Start difference. First operand has 270 places, 327 transitions, 3948 flow. Second operand 6 states and 177 transitions. [2024-06-27 17:51:29,291 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 365 transitions, 4915 flow [2024-06-27 17:51:29,931 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 365 transitions, 4848 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-27 17:51:29,935 INFO L231 Difference]: Finished difference. Result has 271 places, 328 transitions, 3986 flow [2024-06-27 17:51:29,936 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=3883, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=327, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=287, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3986, PETRI_PLACES=271, PETRI_TRANSITIONS=328} [2024-06-27 17:51:29,936 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 222 predicate places. [2024-06-27 17:51:29,936 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 328 transitions, 3986 flow [2024-06-27 17:51:29,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:29,936 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:51:29,936 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:51:29,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-27 17:51:29,937 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:51:29,937 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:51:29,937 INFO L85 PathProgramCache]: Analyzing trace with hash 591133244, now seen corresponding path program 6 times [2024-06-27 17:51:29,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:51:29,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113557543] [2024-06-27 17:51:29,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:51:29,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:51:29,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:51:30,029 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 17:51:30,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:51:30,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113557543] [2024-06-27 17:51:30,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113557543] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:51:30,030 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:51:30,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:51:30,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292981917] [2024-06-27 17:51:30,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:51:30,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:51:30,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:51:30,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:51:30,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:51:30,061 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:51:30,061 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 328 transitions, 3986 flow. Second operand has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:30,061 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:51:30,062 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:51:30,062 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:51:30,993 INFO L124 PetriNetUnfolderBase]: 4064/6642 cut-off events. [2024-06-27 17:51:30,994 INFO L125 PetriNetUnfolderBase]: For 180487/180487 co-relation queries the response was YES. [2024-06-27 17:51:31,051 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36055 conditions, 6642 events. 4064/6642 cut-off events. For 180487/180487 co-relation queries the response was YES. Maximal size of possible extension queue 422. Compared 46071 event pairs, 826 based on Foata normal form. 8/6617 useless extension candidates. Maximal degree in co-relation 35931. Up to 5891 conditions per place. [2024-06-27 17:51:31,077 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 307 selfloop transitions, 32 changer transitions 0/352 dead transitions. [2024-06-27 17:51:31,077 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 352 transitions, 4754 flow [2024-06-27 17:51:31,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:51:31,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:51:31,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 165 transitions. [2024-06-27 17:51:31,078 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6111111111111112 [2024-06-27 17:51:31,078 INFO L175 Difference]: Start difference. First operand has 271 places, 328 transitions, 3986 flow. Second operand 6 states and 165 transitions. [2024-06-27 17:51:31,079 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 352 transitions, 4754 flow [2024-06-27 17:51:31,784 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 352 transitions, 4678 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-27 17:51:31,788 INFO L231 Difference]: Finished difference. Result has 272 places, 328 transitions, 3979 flow [2024-06-27 17:51:31,789 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=3910, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=328, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3979, PETRI_PLACES=272, PETRI_TRANSITIONS=328} [2024-06-27 17:51:31,789 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 223 predicate places. [2024-06-27 17:51:31,789 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 328 transitions, 3979 flow [2024-06-27 17:51:31,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:31,790 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:51:31,790 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:51:31,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-27 17:51:31,790 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:51:31,790 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:51:31,790 INFO L85 PathProgramCache]: Analyzing trace with hash 387242854, now seen corresponding path program 4 times [2024-06-27 17:51:31,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:51:31,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407022998] [2024-06-27 17:51:31,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:51:31,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:51:31,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:51:31,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:51:31,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:51:31,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407022998] [2024-06-27 17:51:31,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407022998] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:51:31,871 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:51:31,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:51:31,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327400732] [2024-06-27 17:51:31,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:51:31,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:51:31,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:51:31,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:51:31,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:51:31,925 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:51:31,926 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 328 transitions, 3979 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:31,926 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:51:31,926 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:51:31,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:51:32,905 INFO L124 PetriNetUnfolderBase]: 4145/7066 cut-off events. [2024-06-27 17:51:32,906 INFO L125 PetriNetUnfolderBase]: For 173463/173466 co-relation queries the response was YES. [2024-06-27 17:51:32,978 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36966 conditions, 7066 events. 4145/7066 cut-off events. For 173463/173466 co-relation queries the response was YES. Maximal size of possible extension queue 429. Compared 50787 event pairs, 1039 based on Foata normal form. 1/7038 useless extension candidates. Maximal degree in co-relation 36843. Up to 5647 conditions per place. [2024-06-27 17:51:33,008 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 250 selfloop transitions, 120 changer transitions 0/383 dead transitions. [2024-06-27 17:51:33,009 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 383 transitions, 5211 flow [2024-06-27 17:51:33,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:51:33,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:51:33,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 237 transitions. [2024-06-27 17:51:33,010 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6583333333333333 [2024-06-27 17:51:33,010 INFO L175 Difference]: Start difference. First operand has 272 places, 328 transitions, 3979 flow. Second operand 8 states and 237 transitions. [2024-06-27 17:51:33,010 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 383 transitions, 5211 flow [2024-06-27 17:51:33,623 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 383 transitions, 5124 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-27 17:51:33,627 INFO L231 Difference]: Finished difference. Result has 276 places, 342 transitions, 4329 flow [2024-06-27 17:51:33,627 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=3892, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=328, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4329, PETRI_PLACES=276, PETRI_TRANSITIONS=342} [2024-06-27 17:51:33,628 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 227 predicate places. [2024-06-27 17:51:33,628 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 342 transitions, 4329 flow [2024-06-27 17:51:33,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:33,628 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:51:33,628 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:51:33,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-27 17:51:33,629 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:51:33,629 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:51:33,629 INFO L85 PathProgramCache]: Analyzing trace with hash 463042530, now seen corresponding path program 4 times [2024-06-27 17:51:33,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:51:33,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341499517] [2024-06-27 17:51:33,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:51:33,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:51:33,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:51:33,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:51:33,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:51:33,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341499517] [2024-06-27 17:51:33,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341499517] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:51:33,706 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:51:33,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:51:33,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402027782] [2024-06-27 17:51:33,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:51:33,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:51:33,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:51:33,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:51:33,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:51:33,734 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:51:33,735 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 342 transitions, 4329 flow. Second operand has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:33,735 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:51:33,735 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:51:33,735 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:51:34,631 INFO L124 PetriNetUnfolderBase]: 4142/6761 cut-off events. [2024-06-27 17:51:34,631 INFO L125 PetriNetUnfolderBase]: For 175875/175893 co-relation queries the response was YES. [2024-06-27 17:51:34,688 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37113 conditions, 6761 events. 4142/6761 cut-off events. For 175875/175893 co-relation queries the response was YES. Maximal size of possible extension queue 428. Compared 47058 event pairs, 795 based on Foata normal form. 13/6733 useless extension candidates. Maximal degree in co-relation 36988. Up to 5833 conditions per place. [2024-06-27 17:51:34,714 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 284 selfloop transitions, 70 changer transitions 0/367 dead transitions. [2024-06-27 17:51:34,714 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 367 transitions, 5213 flow [2024-06-27 17:51:34,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:51:34,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:51:34,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 173 transitions. [2024-06-27 17:51:34,715 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6407407407407407 [2024-06-27 17:51:34,715 INFO L175 Difference]: Start difference. First operand has 276 places, 342 transitions, 4329 flow. Second operand 6 states and 173 transitions. [2024-06-27 17:51:34,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 367 transitions, 5213 flow [2024-06-27 17:51:35,293 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 367 transitions, 5037 flow, removed 26 selfloop flow, removed 3 redundant places. [2024-06-27 17:51:35,297 INFO L231 Difference]: Finished difference. Result has 279 places, 342 transitions, 4304 flow [2024-06-27 17:51:35,298 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=4153, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=342, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4304, PETRI_PLACES=279, PETRI_TRANSITIONS=342} [2024-06-27 17:51:35,298 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 230 predicate places. [2024-06-27 17:51:35,298 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 342 transitions, 4304 flow [2024-06-27 17:51:35,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:35,298 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:51:35,299 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:51:35,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-27 17:51:35,299 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:51:35,299 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:51:35,299 INFO L85 PathProgramCache]: Analyzing trace with hash 1017523594, now seen corresponding path program 5 times [2024-06-27 17:51:35,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:51:35,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091573874] [2024-06-27 17:51:35,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:51:35,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:51:35,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:51:35,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:51:35,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:51:35,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091573874] [2024-06-27 17:51:35,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091573874] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:51:35,393 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:51:35,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:51:35,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222532863] [2024-06-27 17:51:35,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:51:35,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:51:35,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:51:35,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:51:35,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:51:35,449 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:51:35,449 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 342 transitions, 4304 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:35,450 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:51:35,450 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:51:35,450 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:51:36,455 INFO L124 PetriNetUnfolderBase]: 4139/6763 cut-off events. [2024-06-27 17:51:36,456 INFO L125 PetriNetUnfolderBase]: For 177650/177653 co-relation queries the response was YES. [2024-06-27 17:51:36,517 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37233 conditions, 6763 events. 4139/6763 cut-off events. For 177650/177653 co-relation queries the response was YES. Maximal size of possible extension queue 427. Compared 46992 event pairs, 754 based on Foata normal form. 3/6741 useless extension candidates. Maximal degree in co-relation 37106. Up to 5952 conditions per place. [2024-06-27 17:51:36,544 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 308 selfloop transitions, 57 changer transitions 0/378 dead transitions. [2024-06-27 17:51:36,544 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 378 transitions, 5118 flow [2024-06-27 17:51:36,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:51:36,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:51:36,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 226 transitions. [2024-06-27 17:51:36,545 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6277777777777778 [2024-06-27 17:51:36,545 INFO L175 Difference]: Start difference. First operand has 279 places, 342 transitions, 4304 flow. Second operand 8 states and 226 transitions. [2024-06-27 17:51:36,545 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 378 transitions, 5118 flow [2024-06-27 17:51:37,248 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 378 transitions, 4984 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-27 17:51:37,253 INFO L231 Difference]: Finished difference. Result has 282 places, 342 transitions, 4290 flow [2024-06-27 17:51:37,253 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=4170, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=342, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=285, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4290, PETRI_PLACES=282, PETRI_TRANSITIONS=342} [2024-06-27 17:51:37,253 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 233 predicate places. [2024-06-27 17:51:37,253 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 342 transitions, 4290 flow [2024-06-27 17:51:37,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:37,254 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:51:37,254 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:51:37,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-27 17:51:37,254 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:51:37,254 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:51:37,254 INFO L85 PathProgramCache]: Analyzing trace with hash 468284754, now seen corresponding path program 6 times [2024-06-27 17:51:37,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:51:37,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925870961] [2024-06-27 17:51:37,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:51:37,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:51:37,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:51:37,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:51:37,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:51:37,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925870961] [2024-06-27 17:51:37,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925870961] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:51:37,335 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:51:37,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:51:37,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100144464] [2024-06-27 17:51:37,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:51:37,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:51:37,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:51:37,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:51:37,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:51:37,402 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:51:37,403 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 342 transitions, 4290 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:37,403 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:51:37,403 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:51:37,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:51:38,462 INFO L124 PetriNetUnfolderBase]: 4150/6793 cut-off events. [2024-06-27 17:51:38,462 INFO L125 PetriNetUnfolderBase]: For 182683/182686 co-relation queries the response was YES. [2024-06-27 17:51:38,509 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37405 conditions, 6793 events. 4150/6793 cut-off events. For 182683/182686 co-relation queries the response was YES. Maximal size of possible extension queue 429. Compared 47422 event pairs, 763 based on Foata normal form. 1/6765 useless extension candidates. Maximal degree in co-relation 37277. Up to 5652 conditions per place. [2024-06-27 17:51:38,531 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 258 selfloop transitions, 127 changer transitions 0/398 dead transitions. [2024-06-27 17:51:38,531 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 398 transitions, 5466 flow [2024-06-27 17:51:38,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 17:51:38,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 17:51:38,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 291 transitions. [2024-06-27 17:51:38,532 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6466666666666666 [2024-06-27 17:51:38,532 INFO L175 Difference]: Start difference. First operand has 282 places, 342 transitions, 4290 flow. Second operand 10 states and 291 transitions. [2024-06-27 17:51:38,532 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 398 transitions, 5466 flow [2024-06-27 17:51:39,222 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 398 transitions, 5348 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-27 17:51:39,226 INFO L231 Difference]: Finished difference. Result has 287 places, 345 transitions, 4470 flow [2024-06-27 17:51:39,227 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=4172, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=342, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4470, PETRI_PLACES=287, PETRI_TRANSITIONS=345} [2024-06-27 17:51:39,227 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 238 predicate places. [2024-06-27 17:51:39,227 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 345 transitions, 4470 flow [2024-06-27 17:51:39,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:39,228 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:51:39,228 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:51:39,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-27 17:51:39,228 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:51:39,228 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:51:39,228 INFO L85 PathProgramCache]: Analyzing trace with hash 1468966238, now seen corresponding path program 7 times [2024-06-27 17:51:39,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:51:39,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143466522] [2024-06-27 17:51:39,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:51:39,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:51:39,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:51:39,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:51:39,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:51:39,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143466522] [2024-06-27 17:51:39,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143466522] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:51:39,311 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:51:39,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:51:39,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122897194] [2024-06-27 17:51:39,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:51:39,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:51:39,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:51:39,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:51:39,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:51:39,351 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:51:39,352 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 345 transitions, 4470 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:39,352 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:51:39,352 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:51:39,352 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:51:40,379 INFO L124 PetriNetUnfolderBase]: 4161/6812 cut-off events. [2024-06-27 17:51:40,380 INFO L125 PetriNetUnfolderBase]: For 188606/188609 co-relation queries the response was YES. [2024-06-27 17:51:40,442 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37976 conditions, 6812 events. 4161/6812 cut-off events. For 188606/188609 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 47446 event pairs, 763 based on Foata normal form. 1/6784 useless extension candidates. Maximal degree in co-relation 37847. Up to 5664 conditions per place. [2024-06-27 17:51:40,467 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 255 selfloop transitions, 132 changer transitions 0/400 dead transitions. [2024-06-27 17:51:40,467 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 400 transitions, 5532 flow [2024-06-27 17:51:40,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 17:51:40,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 17:51:40,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 308 transitions. [2024-06-27 17:51:40,468 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6222222222222222 [2024-06-27 17:51:40,468 INFO L175 Difference]: Start difference. First operand has 287 places, 345 transitions, 4470 flow. Second operand 11 states and 308 transitions. [2024-06-27 17:51:40,469 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 400 transitions, 5532 flow [2024-06-27 17:51:41,390 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 400 transitions, 5227 flow, removed 17 selfloop flow, removed 8 redundant places. [2024-06-27 17:51:41,395 INFO L231 Difference]: Finished difference. Result has 290 places, 348 transitions, 4479 flow [2024-06-27 17:51:41,395 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=4177, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=345, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4479, PETRI_PLACES=290, PETRI_TRANSITIONS=348} [2024-06-27 17:51:41,396 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 241 predicate places. [2024-06-27 17:51:41,396 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 348 transitions, 4479 flow [2024-06-27 17:51:41,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:41,396 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:51:41,396 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:51:41,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-27 17:51:41,397 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:51:41,397 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:51:41,397 INFO L85 PathProgramCache]: Analyzing trace with hash -1701335576, now seen corresponding path program 5 times [2024-06-27 17:51:41,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:51:41,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996726217] [2024-06-27 17:51:41,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:51:41,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:51:41,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:51:41,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:51:41,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:51:41,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996726217] [2024-06-27 17:51:41,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996726217] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:51:41,473 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:51:41,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:51:41,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697808260] [2024-06-27 17:51:41,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:51:41,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:51:41,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:51:41,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:51:41,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:51:41,505 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:51:41,505 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 348 transitions, 4479 flow. Second operand has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:41,505 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:51:41,505 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:51:41,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:51:42,438 INFO L124 PetriNetUnfolderBase]: 4172/6848 cut-off events. [2024-06-27 17:51:42,438 INFO L125 PetriNetUnfolderBase]: For 194496/194514 co-relation queries the response was YES. [2024-06-27 17:51:42,497 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38073 conditions, 6848 events. 4172/6848 cut-off events. For 194496/194514 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 47961 event pairs, 793 based on Foata normal form. 13/6830 useless extension candidates. Maximal degree in co-relation 37943. Up to 5871 conditions per place. [2024-06-27 17:51:42,522 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 282 selfloop transitions, 84 changer transitions 0/379 dead transitions. [2024-06-27 17:51:42,522 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 379 transitions, 5435 flow [2024-06-27 17:51:42,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:51:42,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:51:42,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 198 transitions. [2024-06-27 17:51:42,523 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6285714285714286 [2024-06-27 17:51:42,523 INFO L175 Difference]: Start difference. First operand has 290 places, 348 transitions, 4479 flow. Second operand 7 states and 198 transitions. [2024-06-27 17:51:42,523 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 379 transitions, 5435 flow [2024-06-27 17:51:43,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 379 transitions, 5185 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-06-27 17:51:43,540 INFO L231 Difference]: Finished difference. Result has 289 places, 351 transitions, 4441 flow [2024-06-27 17:51:43,540 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=4229, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=348, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=267, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4441, PETRI_PLACES=289, PETRI_TRANSITIONS=351} [2024-06-27 17:51:43,540 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 240 predicate places. [2024-06-27 17:51:43,540 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 351 transitions, 4441 flow [2024-06-27 17:51:43,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:43,541 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:51:43,541 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:51:43,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-27 17:51:43,541 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:51:43,541 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:51:43,542 INFO L85 PathProgramCache]: Analyzing trace with hash 1714056394, now seen corresponding path program 8 times [2024-06-27 17:51:43,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:51:43,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334329608] [2024-06-27 17:51:43,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:51:43,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:51:43,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:51:43,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:51:43,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:51:43,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334329608] [2024-06-27 17:51:43,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334329608] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:51:43,635 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:51:43,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:51:43,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311153374] [2024-06-27 17:51:43,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:51:43,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:51:43,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:51:43,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:51:43,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:51:43,689 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:51:43,689 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 351 transitions, 4441 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:43,689 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:51:43,689 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:51:43,689 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:51:44,769 INFO L124 PetriNetUnfolderBase]: 4208/7304 cut-off events. [2024-06-27 17:51:44,769 INFO L125 PetriNetUnfolderBase]: For 202907/202910 co-relation queries the response was YES. [2024-06-27 17:51:44,845 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38725 conditions, 7304 events. 4208/7304 cut-off events. For 202907/202910 co-relation queries the response was YES. Maximal size of possible extension queue 442. Compared 53648 event pairs, 1032 based on Foata normal form. 3/7280 useless extension candidates. Maximal degree in co-relation 38594. Up to 6021 conditions per place. [2024-06-27 17:51:44,876 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 326 selfloop transitions, 70 changer transitions 0/409 dead transitions. [2024-06-27 17:51:44,877 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 409 transitions, 5603 flow [2024-06-27 17:51:44,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 17:51:44,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 17:51:44,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 320 transitions. [2024-06-27 17:51:44,878 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5925925925925926 [2024-06-27 17:51:44,878 INFO L175 Difference]: Start difference. First operand has 289 places, 351 transitions, 4441 flow. Second operand 12 states and 320 transitions. [2024-06-27 17:51:44,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 409 transitions, 5603 flow [2024-06-27 17:51:45,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 409 transitions, 5419 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-27 17:51:45,801 INFO L231 Difference]: Finished difference. Result has 296 places, 360 transitions, 4553 flow [2024-06-27 17:51:45,802 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=4265, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=351, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4553, PETRI_PLACES=296, PETRI_TRANSITIONS=360} [2024-06-27 17:51:45,802 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 247 predicate places. [2024-06-27 17:51:45,802 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 360 transitions, 4553 flow [2024-06-27 17:51:45,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:45,802 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:51:45,802 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:51:45,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-27 17:51:45,803 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:51:45,803 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:51:45,803 INFO L85 PathProgramCache]: Analyzing trace with hash 972988326, now seen corresponding path program 9 times [2024-06-27 17:51:45,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:51:45,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941428365] [2024-06-27 17:51:45,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:51:45,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:51:45,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:51:45,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:51:45,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:51:45,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941428365] [2024-06-27 17:51:45,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941428365] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:51:45,891 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:51:45,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:51:45,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731203350] [2024-06-27 17:51:45,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:51:45,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:51:45,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:51:45,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:51:45,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:51:45,946 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:51:45,947 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 360 transitions, 4553 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:45,947 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:51:45,947 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:51:45,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:51:46,948 INFO L124 PetriNetUnfolderBase]: 4205/6877 cut-off events. [2024-06-27 17:51:46,948 INFO L125 PetriNetUnfolderBase]: For 197869/197872 co-relation queries the response was YES. [2024-06-27 17:51:47,017 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38188 conditions, 6877 events. 4205/6877 cut-off events. For 197869/197872 co-relation queries the response was YES. Maximal size of possible extension queue 438. Compared 47913 event pairs, 754 based on Foata normal form. 3/6854 useless extension candidates. Maximal degree in co-relation 38056. Up to 6018 conditions per place. [2024-06-27 17:51:47,045 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 319 selfloop transitions, 70 changer transitions 0/402 dead transitions. [2024-06-27 17:51:47,046 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 402 transitions, 5427 flow [2024-06-27 17:51:47,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 17:51:47,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 17:51:47,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 273 transitions. [2024-06-27 17:51:47,047 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6066666666666667 [2024-06-27 17:51:47,047 INFO L175 Difference]: Start difference. First operand has 296 places, 360 transitions, 4553 flow. Second operand 10 states and 273 transitions. [2024-06-27 17:51:47,047 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 402 transitions, 5427 flow [2024-06-27 17:51:48,045 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 402 transitions, 5257 flow, removed 19 selfloop flow, removed 8 redundant places. [2024-06-27 17:51:48,050 INFO L231 Difference]: Finished difference. Result has 298 places, 360 transitions, 4529 flow [2024-06-27 17:51:48,050 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=4383, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=360, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4529, PETRI_PLACES=298, PETRI_TRANSITIONS=360} [2024-06-27 17:51:48,050 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 249 predicate places. [2024-06-27 17:51:48,050 INFO L495 AbstractCegarLoop]: Abstraction has has 298 places, 360 transitions, 4529 flow [2024-06-27 17:51:48,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:48,051 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:51:48,051 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:51:48,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-27 17:51:48,051 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:51:48,051 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:51:48,052 INFO L85 PathProgramCache]: Analyzing trace with hash 472296960, now seen corresponding path program 6 times [2024-06-27 17:51:48,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:51:48,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293426636] [2024-06-27 17:51:48,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:51:48,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:51:48,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:51:48,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:51:48,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:51:48,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293426636] [2024-06-27 17:51:48,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293426636] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:51:48,123 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:51:48,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:51:48,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297366844] [2024-06-27 17:51:48,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:51:48,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:51:48,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:51:48,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:51:48,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:51:48,155 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:51:48,156 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 360 transitions, 4529 flow. Second operand has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:48,156 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:51:48,156 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:51:48,156 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:51:49,133 INFO L124 PetriNetUnfolderBase]: 4202/6857 cut-off events. [2024-06-27 17:51:49,133 INFO L125 PetriNetUnfolderBase]: For 201403/201421 co-relation queries the response was YES. [2024-06-27 17:51:49,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38112 conditions, 6857 events. 4202/6857 cut-off events. For 201403/201421 co-relation queries the response was YES. Maximal size of possible extension queue 438. Compared 47803 event pairs, 794 based on Foata normal form. 13/6830 useless extension candidates. Maximal degree in co-relation 37979. Up to 5906 conditions per place. [2024-06-27 17:51:49,216 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 292 selfloop transitions, 76 changer transitions 0/381 dead transitions. [2024-06-27 17:51:49,216 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 381 transitions, 5315 flow [2024-06-27 17:51:49,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:51:49,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:51:49,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 148 transitions. [2024-06-27 17:51:49,217 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6577777777777778 [2024-06-27 17:51:49,217 INFO L175 Difference]: Start difference. First operand has 298 places, 360 transitions, 4529 flow. Second operand 5 states and 148 transitions. [2024-06-27 17:51:49,217 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 381 transitions, 5315 flow [2024-06-27 17:51:50,217 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 381 transitions, 5173 flow, removed 1 selfloop flow, removed 9 redundant places. [2024-06-27 17:51:50,221 INFO L231 Difference]: Finished difference. Result has 294 places, 360 transitions, 4560 flow [2024-06-27 17:51:50,222 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=4387, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=360, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=4560, PETRI_PLACES=294, PETRI_TRANSITIONS=360} [2024-06-27 17:51:50,222 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 245 predicate places. [2024-06-27 17:51:50,222 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 360 transitions, 4560 flow [2024-06-27 17:51:50,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:50,222 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:51:50,222 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:51:50,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-27 17:51:50,223 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:51:50,223 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:51:50,223 INFO L85 PathProgramCache]: Analyzing trace with hash 591136220, now seen corresponding path program 7 times [2024-06-27 17:51:50,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:51:50,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301325732] [2024-06-27 17:51:50,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:51:50,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:51:50,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:51:50,292 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:51:50,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:51:50,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301325732] [2024-06-27 17:51:50,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301325732] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:51:50,293 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:51:50,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:51:50,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108067347] [2024-06-27 17:51:50,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:51:50,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:51:50,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:51:50,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:51:50,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:51:50,317 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:51:50,317 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 360 transitions, 4560 flow. Second operand has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:50,317 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:51:50,317 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:51:50,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:51:51,260 INFO L124 PetriNetUnfolderBase]: 4213/6922 cut-off events. [2024-06-27 17:51:51,260 INFO L125 PetriNetUnfolderBase]: For 208442/208445 co-relation queries the response was YES. [2024-06-27 17:51:51,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38397 conditions, 6922 events. 4213/6922 cut-off events. For 208442/208445 co-relation queries the response was YES. Maximal size of possible extension queue 442. Compared 48504 event pairs, 859 based on Foata normal form. 3/6877 useless extension candidates. Maximal degree in co-relation 38263. Up to 5840 conditions per place. [2024-06-27 17:51:51,347 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 270 selfloop transitions, 99 changer transitions 0/382 dead transitions. [2024-06-27 17:51:51,347 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 382 transitions, 5499 flow [2024-06-27 17:51:51,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:51:51,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:51:51,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 167 transitions. [2024-06-27 17:51:51,348 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6185185185185185 [2024-06-27 17:51:51,348 INFO L175 Difference]: Start difference. First operand has 294 places, 360 transitions, 4560 flow. Second operand 6 states and 167 transitions. [2024-06-27 17:51:51,348 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 382 transitions, 5499 flow [2024-06-27 17:51:52,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 382 transitions, 5322 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-27 17:51:52,309 INFO L231 Difference]: Finished difference. Result has 294 places, 363 transitions, 4618 flow [2024-06-27 17:51:52,309 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=4387, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=360, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4618, PETRI_PLACES=294, PETRI_TRANSITIONS=363} [2024-06-27 17:51:52,310 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 245 predicate places. [2024-06-27 17:51:52,310 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 363 transitions, 4618 flow [2024-06-27 17:51:52,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:52,310 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:51:52,310 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:51:52,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-27 17:51:52,311 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:51:52,311 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:51:52,311 INFO L85 PathProgramCache]: Analyzing trace with hash 580411460, now seen corresponding path program 8 times [2024-06-27 17:51:52,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:51:52,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102274570] [2024-06-27 17:51:52,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:51:52,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:51:52,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:51:52,380 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 17:51:52,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:51:52,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102274570] [2024-06-27 17:51:52,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102274570] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:51:52,381 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:51:52,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:51:52,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610924664] [2024-06-27 17:51:52,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:51:52,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:51:52,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:51:52,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:51:52,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:51:52,420 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:51:52,420 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 363 transitions, 4618 flow. Second operand has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:52,420 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:51:52,420 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:51:52,420 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:51:53,389 INFO L124 PetriNetUnfolderBase]: 4224/6891 cut-off events. [2024-06-27 17:51:53,389 INFO L125 PetriNetUnfolderBase]: For 202291/202309 co-relation queries the response was YES. [2024-06-27 17:51:53,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38387 conditions, 6891 events. 4224/6891 cut-off events. For 202291/202309 co-relation queries the response was YES. Maximal size of possible extension queue 441. Compared 48060 event pairs, 795 based on Foata normal form. 13/6864 useless extension candidates. Maximal degree in co-relation 38254. Up to 5852 conditions per place. [2024-06-27 17:51:53,480 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 276 selfloop transitions, 102 changer transitions 0/391 dead transitions. [2024-06-27 17:51:53,480 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 391 transitions, 5595 flow [2024-06-27 17:51:53,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:51:53,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:51:53,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 172 transitions. [2024-06-27 17:51:53,481 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6370370370370371 [2024-06-27 17:51:53,481 INFO L175 Difference]: Start difference. First operand has 294 places, 363 transitions, 4618 flow. Second operand 6 states and 172 transitions. [2024-06-27 17:51:53,482 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 391 transitions, 5595 flow [2024-06-27 17:51:54,623 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 391 transitions, 5382 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-06-27 17:51:54,628 INFO L231 Difference]: Finished difference. Result has 296 places, 366 transitions, 4652 flow [2024-06-27 17:51:54,628 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=4411, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=363, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4652, PETRI_PLACES=296, PETRI_TRANSITIONS=366} [2024-06-27 17:51:54,628 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 247 predicate places. [2024-06-27 17:51:54,629 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 366 transitions, 4652 flow [2024-06-27 17:51:54,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:54,629 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:51:54,629 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:51:54,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-27 17:51:54,629 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:51:54,629 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:51:54,630 INFO L85 PathProgramCache]: Analyzing trace with hash 583898774, now seen corresponding path program 10 times [2024-06-27 17:51:54,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:51:54,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296933988] [2024-06-27 17:51:54,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:51:54,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:51:54,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:51:54,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:51:54,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:51:54,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296933988] [2024-06-27 17:51:54,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296933988] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:51:54,721 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:51:54,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:51:54,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078526600] [2024-06-27 17:51:54,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:51:54,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:51:54,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:51:54,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:51:54,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:51:54,766 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:51:54,767 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 366 transitions, 4652 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:54,767 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:51:54,767 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:51:54,767 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:51:55,804 INFO L124 PetriNetUnfolderBase]: 4260/6964 cut-off events. [2024-06-27 17:51:55,804 INFO L125 PetriNetUnfolderBase]: For 209196/209199 co-relation queries the response was YES. [2024-06-27 17:51:55,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38977 conditions, 6964 events. 4260/6964 cut-off events. For 209196/209199 co-relation queries the response was YES. Maximal size of possible extension queue 446. Compared 48633 event pairs, 756 based on Foata normal form. 3/6940 useless extension candidates. Maximal degree in co-relation 38844. Up to 6123 conditions per place. [2024-06-27 17:51:55,895 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 340 selfloop transitions, 62 changer transitions 0/415 dead transitions. [2024-06-27 17:51:55,895 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 415 transitions, 5821 flow [2024-06-27 17:51:55,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 17:51:55,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 17:51:55,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 287 transitions. [2024-06-27 17:51:55,896 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5797979797979798 [2024-06-27 17:51:55,897 INFO L175 Difference]: Start difference. First operand has 296 places, 366 transitions, 4652 flow. Second operand 11 states and 287 transitions. [2024-06-27 17:51:55,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 415 transitions, 5821 flow [2024-06-27 17:51:56,879 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 415 transitions, 5589 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-27 17:51:56,883 INFO L231 Difference]: Finished difference. Result has 304 places, 375 transitions, 4723 flow [2024-06-27 17:51:56,884 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=4428, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=304, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4723, PETRI_PLACES=304, PETRI_TRANSITIONS=375} [2024-06-27 17:51:56,884 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 255 predicate places. [2024-06-27 17:51:56,884 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 375 transitions, 4723 flow [2024-06-27 17:51:56,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:56,884 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:51:56,885 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:51:56,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-27 17:51:56,885 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:51:56,885 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:51:56,885 INFO L85 PathProgramCache]: Analyzing trace with hash -2129593610, now seen corresponding path program 9 times [2024-06-27 17:51:56,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:51:56,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324615162] [2024-06-27 17:51:56,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:51:56,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:51:56,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:51:56,954 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:51:56,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:51:56,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324615162] [2024-06-27 17:51:56,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324615162] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:51:56,955 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:51:56,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:51:56,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006934573] [2024-06-27 17:51:56,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:51:56,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:51:56,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:51:56,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:51:56,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:51:56,988 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:51:56,988 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 375 transitions, 4723 flow. Second operand has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:56,988 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:51:56,988 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:51:56,988 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:51:57,971 INFO L124 PetriNetUnfolderBase]: 4257/6961 cut-off events. [2024-06-27 17:51:57,971 INFO L125 PetriNetUnfolderBase]: For 207594/207612 co-relation queries the response was YES. [2024-06-27 17:51:58,045 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38750 conditions, 6961 events. 4257/6961 cut-off events. For 207594/207612 co-relation queries the response was YES. Maximal size of possible extension queue 446. Compared 48577 event pairs, 801 based on Foata normal form. 13/6933 useless extension candidates. Maximal degree in co-relation 38615. Up to 5891 conditions per place. [2024-06-27 17:51:58,073 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 288 selfloop transitions, 101 changer transitions 0/402 dead transitions. [2024-06-27 17:51:58,073 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 402 transitions, 5565 flow [2024-06-27 17:51:58,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:51:58,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:51:58,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 175 transitions. [2024-06-27 17:51:58,074 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6481481481481481 [2024-06-27 17:51:58,074 INFO L175 Difference]: Start difference. First operand has 304 places, 375 transitions, 4723 flow. Second operand 6 states and 175 transitions. [2024-06-27 17:51:58,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 402 transitions, 5565 flow [2024-06-27 17:51:59,170 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 402 transitions, 5417 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-27 17:51:59,174 INFO L231 Difference]: Finished difference. Result has 303 places, 375 transitions, 4791 flow [2024-06-27 17:51:59,175 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=4575, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=375, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4791, PETRI_PLACES=303, PETRI_TRANSITIONS=375} [2024-06-27 17:51:59,175 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 254 predicate places. [2024-06-27 17:51:59,175 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 375 transitions, 4791 flow [2024-06-27 17:51:59,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:59,175 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:51:59,175 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:51:59,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-27 17:51:59,176 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:51:59,176 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:51:59,176 INFO L85 PathProgramCache]: Analyzing trace with hash 583893194, now seen corresponding path program 11 times [2024-06-27 17:51:59,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:51:59,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971206063] [2024-06-27 17:51:59,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:51:59,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:51:59,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:51:59,264 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:51:59,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:51:59,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971206063] [2024-06-27 17:51:59,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971206063] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:51:59,264 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:51:59,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:51:59,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711875977] [2024-06-27 17:51:59,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:51:59,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:51:59,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:51:59,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:51:59,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:51:59,312 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:51:59,313 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 375 transitions, 4791 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:59,313 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:51:59,313 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:51:59,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:52:00,335 INFO L124 PetriNetUnfolderBase]: 4254/6956 cut-off events. [2024-06-27 17:52:00,335 INFO L125 PetriNetUnfolderBase]: For 209750/209753 co-relation queries the response was YES. [2024-06-27 17:52:00,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38905 conditions, 6956 events. 4254/6956 cut-off events. For 209750/209753 co-relation queries the response was YES. Maximal size of possible extension queue 446. Compared 48678 event pairs, 756 based on Foata normal form. 3/6932 useless extension candidates. Maximal degree in co-relation 38769. Up to 6116 conditions per place. [2024-06-27 17:52:00,422 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 336 selfloop transitions, 62 changer transitions 0/411 dead transitions. [2024-06-27 17:52:00,423 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 411 transitions, 5667 flow [2024-06-27 17:52:00,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 17:52:00,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 17:52:00,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 264 transitions. [2024-06-27 17:52:00,424 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5866666666666667 [2024-06-27 17:52:00,424 INFO L175 Difference]: Start difference. First operand has 303 places, 375 transitions, 4791 flow. Second operand 10 states and 264 transitions. [2024-06-27 17:52:00,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 411 transitions, 5667 flow [2024-06-27 17:52:01,449 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 411 transitions, 5417 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-27 17:52:01,453 INFO L231 Difference]: Finished difference. Result has 306 places, 375 transitions, 4671 flow [2024-06-27 17:52:01,454 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=4541, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=375, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=313, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4671, PETRI_PLACES=306, PETRI_TRANSITIONS=375} [2024-06-27 17:52:01,454 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 257 predicate places. [2024-06-27 17:52:01,454 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 375 transitions, 4671 flow [2024-06-27 17:52:01,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:01,454 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:52:01,454 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:52:01,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-27 17:52:01,455 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:52:01,455 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:52:01,455 INFO L85 PathProgramCache]: Analyzing trace with hash 1664687528, now seen corresponding path program 12 times [2024-06-27 17:52:01,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:52:01,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011462114] [2024-06-27 17:52:01,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:52:01,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:52:01,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:52:01,525 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 17:52:01,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:52:01,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011462114] [2024-06-27 17:52:01,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011462114] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:52:01,526 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:52:01,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:52:01,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333728021] [2024-06-27 17:52:01,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:52:01,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:52:01,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:52:01,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:52:01,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:52:01,561 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:52:01,561 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 375 transitions, 4671 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:01,561 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:52:01,562 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:52:01,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:52:02,571 INFO L124 PetriNetUnfolderBase]: 4312/7060 cut-off events. [2024-06-27 17:52:02,571 INFO L125 PetriNetUnfolderBase]: For 206628/206631 co-relation queries the response was YES. [2024-06-27 17:52:02,642 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39206 conditions, 7060 events. 4312/7060 cut-off events. For 206628/206631 co-relation queries the response was YES. Maximal size of possible extension queue 447. Compared 49469 event pairs, 791 based on Foata normal form. 3/7020 useless extension candidates. Maximal degree in co-relation 39071. Up to 5844 conditions per place. [2024-06-27 17:52:02,670 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 253 selfloop transitions, 162 changer transitions 0/428 dead transitions. [2024-06-27 17:52:02,671 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 428 transitions, 6073 flow [2024-06-27 17:52:02,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 17:52:02,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 17:52:02,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 270 transitions. [2024-06-27 17:52:02,672 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-27 17:52:02,672 INFO L175 Difference]: Start difference. First operand has 306 places, 375 transitions, 4671 flow. Second operand 10 states and 270 transitions. [2024-06-27 17:52:02,672 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 428 transitions, 6073 flow [2024-06-27 17:52:03,535 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 428 transitions, 5949 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-27 17:52:03,540 INFO L231 Difference]: Finished difference. Result has 309 places, 390 transitions, 5152 flow [2024-06-27 17:52:03,541 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=4547, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=375, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5152, PETRI_PLACES=309, PETRI_TRANSITIONS=390} [2024-06-27 17:52:03,541 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 260 predicate places. [2024-06-27 17:52:03,541 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 390 transitions, 5152 flow [2024-06-27 17:52:03,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:03,541 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:52:03,541 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:52:03,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-27 17:52:03,542 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:52:03,542 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:52:03,542 INFO L85 PathProgramCache]: Analyzing trace with hash 393595626, now seen corresponding path program 1 times [2024-06-27 17:52:03,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:52:03,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433742455] [2024-06-27 17:52:03,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:52:03,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:52:03,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:52:03,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:52:03,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:52:03,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433742455] [2024-06-27 17:52:03,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433742455] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:52:03,616 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:52:03,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:52:03,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359091006] [2024-06-27 17:52:03,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:52:03,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:52:03,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:52:03,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:52:03,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:52:03,658 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:52:03,658 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 390 transitions, 5152 flow. Second operand has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:03,658 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:52:03,658 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:52:03,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:52:04,683 INFO L124 PetriNetUnfolderBase]: 4358/7202 cut-off events. [2024-06-27 17:52:04,683 INFO L125 PetriNetUnfolderBase]: For 227258/227258 co-relation queries the response was YES. [2024-06-27 17:52:04,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40233 conditions, 7202 events. 4358/7202 cut-off events. For 227258/227258 co-relation queries the response was YES. Maximal size of possible extension queue 459. Compared 51136 event pairs, 1392 based on Foata normal form. 6/7137 useless extension candidates. Maximal degree in co-relation 40095. Up to 6066 conditions per place. [2024-06-27 17:52:04,772 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 368 selfloop transitions, 40 changer transitions 0/421 dead transitions. [2024-06-27 17:52:04,772 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 421 transitions, 6100 flow [2024-06-27 17:52:04,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:52:04,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:52:04,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 168 transitions. [2024-06-27 17:52:04,773 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6222222222222222 [2024-06-27 17:52:04,773 INFO L175 Difference]: Start difference. First operand has 309 places, 390 transitions, 5152 flow. Second operand 6 states and 168 transitions. [2024-06-27 17:52:04,774 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 421 transitions, 6100 flow [2024-06-27 17:52:05,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 421 transitions, 5798 flow, removed 31 selfloop flow, removed 5 redundant places. [2024-06-27 17:52:05,609 INFO L231 Difference]: Finished difference. Result has 311 places, 394 transitions, 4980 flow [2024-06-27 17:52:05,609 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=4851, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=390, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=351, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4980, PETRI_PLACES=311, PETRI_TRANSITIONS=394} [2024-06-27 17:52:05,609 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 262 predicate places. [2024-06-27 17:52:05,609 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 394 transitions, 4980 flow [2024-06-27 17:52:05,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:05,610 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:52:05,610 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:52:05,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-27 17:52:05,610 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:52:05,610 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:52:05,610 INFO L85 PathProgramCache]: Analyzing trace with hash -1447485382, now seen corresponding path program 13 times [2024-06-27 17:52:05,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:52:05,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333937566] [2024-06-27 17:52:05,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:52:05,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:52:05,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:52:05,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:52:05,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:52:05,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333937566] [2024-06-27 17:52:05,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333937566] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:52:05,708 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:52:05,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:52:05,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464272872] [2024-06-27 17:52:05,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:52:05,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:52:05,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:52:05,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:52:05,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:52:05,746 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:52:05,747 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 394 transitions, 4980 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:05,747 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:52:05,747 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:52:05,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:52:07,090 INFO L124 PetriNetUnfolderBase]: 4453/7274 cut-off events. [2024-06-27 17:52:07,091 INFO L125 PetriNetUnfolderBase]: For 234458/234461 co-relation queries the response was YES. [2024-06-27 17:52:07,197 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41252 conditions, 7274 events. 4453/7274 cut-off events. For 234458/234461 co-relation queries the response was YES. Maximal size of possible extension queue 466. Compared 51097 event pairs, 772 based on Foata normal form. 1/7251 useless extension candidates. Maximal degree in co-relation 41113. Up to 5643 conditions per place. [2024-06-27 17:52:07,233 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 232 selfloop transitions, 221 changer transitions 0/466 dead transitions. [2024-06-27 17:52:07,234 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 466 transitions, 6804 flow [2024-06-27 17:52:07,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 17:52:07,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 17:52:07,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 295 transitions. [2024-06-27 17:52:07,235 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6555555555555556 [2024-06-27 17:52:07,235 INFO L175 Difference]: Start difference. First operand has 311 places, 394 transitions, 4980 flow. Second operand 10 states and 295 transitions. [2024-06-27 17:52:07,235 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 466 transitions, 6804 flow [2024-06-27 17:52:08,338 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 466 transitions, 6758 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-27 17:52:08,343 INFO L231 Difference]: Finished difference. Result has 320 places, 411 transitions, 5688 flow [2024-06-27 17:52:08,344 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=4934, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=394, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=204, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5688, PETRI_PLACES=320, PETRI_TRANSITIONS=411} [2024-06-27 17:52:08,344 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 271 predicate places. [2024-06-27 17:52:08,344 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 411 transitions, 5688 flow [2024-06-27 17:52:08,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:08,344 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:52:08,344 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:52:08,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-27 17:52:08,345 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:52:08,345 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:52:08,345 INFO L85 PathProgramCache]: Analyzing trace with hash -854675724, now seen corresponding path program 14 times [2024-06-27 17:52:08,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:52:08,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559384934] [2024-06-27 17:52:08,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:52:08,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:52:08,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:52:08,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:52:08,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:52:08,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559384934] [2024-06-27 17:52:08,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559384934] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:52:08,424 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:52:08,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:52:08,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327602454] [2024-06-27 17:52:08,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:52:08,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:52:08,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:52:08,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:52:08,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:52:08,468 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:52:08,469 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 411 transitions, 5688 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:08,469 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:52:08,469 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:52:08,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:52:09,650 INFO L124 PetriNetUnfolderBase]: 4478/7325 cut-off events. [2024-06-27 17:52:09,650 INFO L125 PetriNetUnfolderBase]: For 247524/247527 co-relation queries the response was YES. [2024-06-27 17:52:09,716 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42911 conditions, 7325 events. 4478/7325 cut-off events. For 247524/247527 co-relation queries the response was YES. Maximal size of possible extension queue 472. Compared 51587 event pairs, 775 based on Foata normal form. 1/7301 useless extension candidates. Maximal degree in co-relation 42769. Up to 5661 conditions per place. [2024-06-27 17:52:09,744 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 228 selfloop transitions, 231 changer transitions 0/472 dead transitions. [2024-06-27 17:52:09,744 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 472 transitions, 7402 flow [2024-06-27 17:52:09,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 17:52:09,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 17:52:09,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 313 transitions. [2024-06-27 17:52:09,745 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6323232323232323 [2024-06-27 17:52:09,746 INFO L175 Difference]: Start difference. First operand has 320 places, 411 transitions, 5688 flow. Second operand 11 states and 313 transitions. [2024-06-27 17:52:09,746 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 472 transitions, 7402 flow [2024-06-27 17:52:10,915 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 472 transitions, 6896 flow, removed 61 selfloop flow, removed 6 redundant places. [2024-06-27 17:52:10,921 INFO L231 Difference]: Finished difference. Result has 325 places, 417 transitions, 5780 flow [2024-06-27 17:52:10,921 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=5222, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=411, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=225, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5780, PETRI_PLACES=325, PETRI_TRANSITIONS=417} [2024-06-27 17:52:10,922 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 276 predicate places. [2024-06-27 17:52:10,922 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 417 transitions, 5780 flow [2024-06-27 17:52:10,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:10,922 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:52:10,922 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 17:52:10,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-27 17:52:10,923 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:52:10,923 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:52:10,923 INFO L85 PathProgramCache]: Analyzing trace with hash 1841257996, now seen corresponding path program 15 times [2024-06-27 17:52:10,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:52:10,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115811003] [2024-06-27 17:52:10,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:52:10,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:52:10,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:52:11,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:52:11,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:52:11,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115811003] [2024-06-27 17:52:11,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115811003] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:52:11,040 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:52:11,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:52:11,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432735490] [2024-06-27 17:52:11,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:52:11,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:52:11,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:52:11,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:52:11,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:52:11,098 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:52:11,099 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 417 transitions, 5780 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:11,099 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:52:11,099 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:52:11,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:52:12,213 INFO L124 PetriNetUnfolderBase]: 4489/7374 cut-off events. [2024-06-27 17:52:12,214 INFO L125 PetriNetUnfolderBase]: For 247831/247849 co-relation queries the response was YES. [2024-06-27 17:52:12,286 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42983 conditions, 7374 events. 4489/7374 cut-off events. For 247831/247849 co-relation queries the response was YES. Maximal size of possible extension queue 475. Compared 52036 event pairs, 806 based on Foata normal form. 13/7355 useless extension candidates. Maximal degree in co-relation 42841. Up to 5669 conditions per place. [2024-06-27 17:52:12,316 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 267 selfloop transitions, 187 changer transitions 0/467 dead transitions. [2024-06-27 17:52:12,316 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 467 transitions, 7122 flow [2024-06-27 17:52:12,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 17:52:12,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 17:52:12,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 262 transitions. [2024-06-27 17:52:12,317 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6469135802469136 [2024-06-27 17:52:12,317 INFO L175 Difference]: Start difference. First operand has 325 places, 417 transitions, 5780 flow. Second operand 9 states and 262 transitions. [2024-06-27 17:52:12,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 467 transitions, 7122 flow [2024-06-27 17:52:13,559 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 467 transitions, 6700 flow, removed 21 selfloop flow, removed 8 redundant places. [2024-06-27 17:52:13,565 INFO L231 Difference]: Finished difference. Result has 326 places, 420 transitions, 5790 flow [2024-06-27 17:52:13,565 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=5368, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=417, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=184, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5790, PETRI_PLACES=326, PETRI_TRANSITIONS=420} [2024-06-27 17:52:13,566 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 277 predicate places. [2024-06-27 17:52:13,566 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 420 transitions, 5790 flow [2024-06-27 17:52:13,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:13,566 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:52:13,566 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:52:13,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-27 17:52:13,566 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:52:13,567 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:52:13,567 INFO L85 PathProgramCache]: Analyzing trace with hash 1915292630, now seen corresponding path program 16 times [2024-06-27 17:52:13,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:52:13,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978692914] [2024-06-27 17:52:13,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:52:13,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:52:13,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:52:13,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:52:13,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:52:13,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978692914] [2024-06-27 17:52:13,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978692914] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:52:13,669 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:52:13,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:52:13,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553033464] [2024-06-27 17:52:13,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:52:13,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:52:13,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:52:13,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:52:13,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:52:13,717 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:52:13,717 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 420 transitions, 5790 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:13,717 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:52:13,717 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:52:13,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:52:14,954 INFO L124 PetriNetUnfolderBase]: 4500/7393 cut-off events. [2024-06-27 17:52:14,955 INFO L125 PetriNetUnfolderBase]: For 248549/248567 co-relation queries the response was YES. [2024-06-27 17:52:15,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42941 conditions, 7393 events. 4500/7393 cut-off events. For 248549/248567 co-relation queries the response was YES. Maximal size of possible extension queue 476. Compared 52227 event pairs, 805 based on Foata normal form. 13/7375 useless extension candidates. Maximal degree in co-relation 42799. Up to 5677 conditions per place. [2024-06-27 17:52:15,042 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 272 selfloop transitions, 191 changer transitions 0/476 dead transitions. [2024-06-27 17:52:15,042 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 476 transitions, 7162 flow [2024-06-27 17:52:15,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 17:52:15,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 17:52:15,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 308 transitions. [2024-06-27 17:52:15,043 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6222222222222222 [2024-06-27 17:52:15,043 INFO L175 Difference]: Start difference. First operand has 326 places, 420 transitions, 5790 flow. Second operand 11 states and 308 transitions. [2024-06-27 17:52:15,043 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 476 transitions, 7162 flow [2024-06-27 17:52:16,160 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 476 transitions, 6743 flow, removed 35 selfloop flow, removed 6 redundant places. [2024-06-27 17:52:16,166 INFO L231 Difference]: Finished difference. Result has 331 places, 423 transitions, 5807 flow [2024-06-27 17:52:16,166 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=5390, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=420, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=188, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5807, PETRI_PLACES=331, PETRI_TRANSITIONS=423} [2024-06-27 17:52:16,167 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 282 predicate places. [2024-06-27 17:52:16,167 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 423 transitions, 5807 flow [2024-06-27 17:52:16,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:16,167 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:52:16,167 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:52:16,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-27 17:52:16,168 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:52:16,168 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:52:16,168 INFO L85 PathProgramCache]: Analyzing trace with hash -906124376, now seen corresponding path program 17 times [2024-06-27 17:52:16,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:52:16,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904578521] [2024-06-27 17:52:16,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:52:16,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:52:16,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:52:16,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:52:16,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:52:16,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904578521] [2024-06-27 17:52:16,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904578521] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:52:16,269 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:52:16,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:52:16,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406026746] [2024-06-27 17:52:16,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:52:16,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:52:16,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:52:16,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:52:16,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:52:16,300 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:52:16,300 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 423 transitions, 5807 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:16,300 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:52:16,300 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:52:16,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:52:17,364 INFO L124 PetriNetUnfolderBase]: 4497/7359 cut-off events. [2024-06-27 17:52:17,364 INFO L125 PetriNetUnfolderBase]: For 249635/249638 co-relation queries the response was YES. [2024-06-27 17:52:17,435 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42824 conditions, 7359 events. 4497/7359 cut-off events. For 249635/249638 co-relation queries the response was YES. Maximal size of possible extension queue 475. Compared 51953 event pairs, 797 based on Foata normal form. 1/7332 useless extension candidates. Maximal degree in co-relation 42681. Up to 5675 conditions per place. [2024-06-27 17:52:17,463 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 226 selfloop transitions, 226 changer transitions 0/465 dead transitions. [2024-06-27 17:52:17,464 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 465 transitions, 7229 flow [2024-06-27 17:52:17,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:52:17,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:52:17,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 238 transitions. [2024-06-27 17:52:17,465 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6611111111111111 [2024-06-27 17:52:17,465 INFO L175 Difference]: Start difference. First operand has 331 places, 423 transitions, 5807 flow. Second operand 8 states and 238 transitions. [2024-06-27 17:52:17,465 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 465 transitions, 7229 flow [2024-06-27 17:52:18,726 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 465 transitions, 6823 flow, removed 12 selfloop flow, removed 9 redundant places. [2024-06-27 17:52:18,732 INFO L231 Difference]: Finished difference. Result has 330 places, 423 transitions, 5863 flow [2024-06-27 17:52:18,733 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=5401, PETRI_DIFFERENCE_MINUEND_PLACES=322, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=423, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=226, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5863, PETRI_PLACES=330, PETRI_TRANSITIONS=423} [2024-06-27 17:52:18,733 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 281 predicate places. [2024-06-27 17:52:18,733 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 423 transitions, 5863 flow [2024-06-27 17:52:18,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:18,733 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:52:18,733 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:52:18,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-27 17:52:18,734 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:52:18,734 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:52:18,734 INFO L85 PathProgramCache]: Analyzing trace with hash -860216664, now seen corresponding path program 18 times [2024-06-27 17:52:18,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:52:18,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683311917] [2024-06-27 17:52:18,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:52:18,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:52:18,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:52:18,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:52:18,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:52:18,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683311917] [2024-06-27 17:52:18,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683311917] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:52:18,834 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:52:18,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:52:18,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762952086] [2024-06-27 17:52:18,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:52:18,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:52:18,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:52:18,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:52:18,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:52:18,881 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:52:18,881 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 423 transitions, 5863 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:18,881 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:52:18,881 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:52:18,882 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:52:20,094 INFO L124 PetriNetUnfolderBase]: 4494/7338 cut-off events. [2024-06-27 17:52:20,094 INFO L125 PetriNetUnfolderBase]: For 252126/252129 co-relation queries the response was YES. [2024-06-27 17:52:20,157 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42901 conditions, 7338 events. 4494/7338 cut-off events. For 252126/252129 co-relation queries the response was YES. Maximal size of possible extension queue 475. Compared 51610 event pairs, 774 based on Foata normal form. 3/7315 useless extension candidates. Maximal degree in co-relation 42757. Up to 6276 conditions per place. [2024-06-27 17:52:20,184 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 339 selfloop transitions, 107 changer transitions 0/459 dead transitions. [2024-06-27 17:52:20,184 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 459 transitions, 6839 flow [2024-06-27 17:52:20,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:52:20,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:52:20,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 227 transitions. [2024-06-27 17:52:20,185 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6305555555555555 [2024-06-27 17:52:20,185 INFO L175 Difference]: Start difference. First operand has 330 places, 423 transitions, 5863 flow. Second operand 8 states and 227 transitions. [2024-06-27 17:52:20,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 459 transitions, 6839 flow [2024-06-27 17:52:21,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 459 transitions, 6359 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-27 17:52:21,336 INFO L231 Difference]: Finished difference. Result has 330 places, 423 transitions, 5607 flow [2024-06-27 17:52:21,336 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=5383, PETRI_DIFFERENCE_MINUEND_PLACES=322, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=423, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=316, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5607, PETRI_PLACES=330, PETRI_TRANSITIONS=423} [2024-06-27 17:52:21,336 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 281 predicate places. [2024-06-27 17:52:21,337 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 423 transitions, 5607 flow [2024-06-27 17:52:21,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:21,337 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:52:21,337 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:52:21,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-27 17:52:21,337 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:52:21,337 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:52:21,337 INFO L85 PathProgramCache]: Analyzing trace with hash -2025411626, now seen corresponding path program 19 times [2024-06-27 17:52:21,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:52:21,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803192198] [2024-06-27 17:52:21,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:52:21,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:52:21,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:52:21,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:52:21,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:52:21,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803192198] [2024-06-27 17:52:21,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803192198] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:52:21,416 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:52:21,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:52:21,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857974708] [2024-06-27 17:52:21,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:52:21,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:52:21,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:52:21,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:52:21,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:52:21,455 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:52:21,455 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 423 transitions, 5607 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:21,455 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:52:21,455 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:52:21,456 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:52:22,602 INFO L124 PetriNetUnfolderBase]: 4530/7431 cut-off events. [2024-06-27 17:52:22,602 INFO L125 PetriNetUnfolderBase]: For 256559/256577 co-relation queries the response was YES. [2024-06-27 17:52:22,672 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42566 conditions, 7431 events. 4530/7431 cut-off events. For 256559/256577 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 52453 event pairs, 798 based on Foata normal form. 14/7414 useless extension candidates. Maximal degree in co-relation 42422. Up to 5708 conditions per place. [2024-06-27 17:52:22,699 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 265 selfloop transitions, 196 changer transitions 0/474 dead transitions. [2024-06-27 17:52:22,700 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 474 transitions, 6969 flow [2024-06-27 17:52:22,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 17:52:22,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 17:52:22,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 280 transitions. [2024-06-27 17:52:22,701 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6222222222222222 [2024-06-27 17:52:22,701 INFO L175 Difference]: Start difference. First operand has 330 places, 423 transitions, 5607 flow. Second operand 10 states and 280 transitions. [2024-06-27 17:52:22,701 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 474 transitions, 6969 flow [2024-06-27 17:52:23,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 474 transitions, 6735 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-27 17:52:23,949 INFO L231 Difference]: Finished difference. Result has 332 places, 430 transitions, 5834 flow [2024-06-27 17:52:23,950 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=5377, PETRI_DIFFERENCE_MINUEND_PLACES=322, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=423, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=189, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5834, PETRI_PLACES=332, PETRI_TRANSITIONS=430} [2024-06-27 17:52:23,950 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 283 predicate places. [2024-06-27 17:52:23,950 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 430 transitions, 5834 flow [2024-06-27 17:52:23,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:23,950 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:52:23,950 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:52:23,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-27 17:52:23,951 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:52:23,952 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:52:23,952 INFO L85 PathProgramCache]: Analyzing trace with hash -36657034, now seen corresponding path program 20 times [2024-06-27 17:52:23,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:52:23,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191559742] [2024-06-27 17:52:23,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:52:23,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:52:23,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:52:24,041 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:52:24,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:52:24,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191559742] [2024-06-27 17:52:24,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191559742] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:52:24,042 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:52:24,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:52:24,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009385080] [2024-06-27 17:52:24,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:52:24,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:52:24,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:52:24,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:52:24,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:52:24,089 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:52:24,089 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 430 transitions, 5834 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:24,090 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:52:24,090 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:52:24,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:52:25,326 INFO L124 PetriNetUnfolderBase]: 4527/7412 cut-off events. [2024-06-27 17:52:25,326 INFO L125 PetriNetUnfolderBase]: For 252594/252597 co-relation queries the response was YES. [2024-06-27 17:52:25,396 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43003 conditions, 7412 events. 4527/7412 cut-off events. For 252594/252597 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 52371 event pairs, 773 based on Foata normal form. 3/7390 useless extension candidates. Maximal degree in co-relation 42859. Up to 6257 conditions per place. [2024-06-27 17:52:25,425 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 330 selfloop transitions, 136 changer transitions 0/479 dead transitions. [2024-06-27 17:52:25,425 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 479 transitions, 7018 flow [2024-06-27 17:52:25,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 17:52:25,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 17:52:25,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 323 transitions. [2024-06-27 17:52:25,428 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5981481481481481 [2024-06-27 17:52:25,428 INFO L175 Difference]: Start difference. First operand has 332 places, 430 transitions, 5834 flow. Second operand 12 states and 323 transitions. [2024-06-27 17:52:25,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 479 transitions, 7018 flow [2024-06-27 17:52:26,668 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 479 transitions, 6718 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-27 17:52:26,673 INFO L231 Difference]: Finished difference. Result has 338 places, 430 transitions, 5820 flow [2024-06-27 17:52:26,674 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=5534, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=430, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5820, PETRI_PLACES=338, PETRI_TRANSITIONS=430} [2024-06-27 17:52:26,674 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 289 predicate places. [2024-06-27 17:52:26,674 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 430 transitions, 5820 flow [2024-06-27 17:52:26,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:26,674 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:52:26,674 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:52:26,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-27 17:52:26,675 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:52:26,675 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:52:26,675 INFO L85 PathProgramCache]: Analyzing trace with hash -850956654, now seen corresponding path program 21 times [2024-06-27 17:52:26,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:52:26,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278781844] [2024-06-27 17:52:26,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:52:26,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:52:26,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:52:26,764 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 17:52:26,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:52:26,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278781844] [2024-06-27 17:52:26,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278781844] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:52:26,764 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:52:26,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:52:26,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374210245] [2024-06-27 17:52:26,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:52:26,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:52:26,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:52:26,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:52:26,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:52:26,813 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:52:26,814 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 430 transitions, 5820 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:26,814 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:52:26,814 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:52:26,814 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:52:27,915 INFO L124 PetriNetUnfolderBase]: 4524/7404 cut-off events. [2024-06-27 17:52:27,915 INFO L125 PetriNetUnfolderBase]: For 255305/255308 co-relation queries the response was YES. [2024-06-27 17:52:27,989 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42744 conditions, 7404 events. 4524/7404 cut-off events. For 255305/255308 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 52284 event pairs, 774 based on Foata normal form. 3/7382 useless extension candidates. Maximal degree in co-relation 42599. Up to 6254 conditions per place. [2024-06-27 17:52:28,018 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 323 selfloop transitions, 136 changer transitions 0/472 dead transitions. [2024-06-27 17:52:28,018 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 472 transitions, 6834 flow [2024-06-27 17:52:28,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 17:52:28,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 17:52:28,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 275 transitions. [2024-06-27 17:52:28,019 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6111111111111112 [2024-06-27 17:52:28,019 INFO L175 Difference]: Start difference. First operand has 338 places, 430 transitions, 5820 flow. Second operand 10 states and 275 transitions. [2024-06-27 17:52:28,019 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 472 transitions, 6834 flow [2024-06-27 17:52:29,131 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 472 transitions, 6542 flow, removed 12 selfloop flow, removed 10 redundant places. [2024-06-27 17:52:29,137 INFO L231 Difference]: Finished difference. Result has 338 places, 430 transitions, 5814 flow [2024-06-27 17:52:29,137 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=5528, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=430, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5814, PETRI_PLACES=338, PETRI_TRANSITIONS=430} [2024-06-27 17:52:29,138 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 289 predicate places. [2024-06-27 17:52:29,138 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 430 transitions, 5814 flow [2024-06-27 17:52:29,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:29,138 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:52:29,138 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:52:29,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-27 17:52:29,138 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:52:29,139 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:52:29,139 INFO L85 PathProgramCache]: Analyzing trace with hash 590807400, now seen corresponding path program 22 times [2024-06-27 17:52:29,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:52:29,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722713627] [2024-06-27 17:52:29,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:52:29,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:52:29,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:52:29,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:52:29,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:52:29,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722713627] [2024-06-27 17:52:29,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722713627] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:52:29,221 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:52:29,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:52:29,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391294731] [2024-06-27 17:52:29,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:52:29,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:52:29,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:52:29,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:52:29,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:52:29,268 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:52:29,269 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 430 transitions, 5814 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:29,269 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:52:29,269 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:52:29,269 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:52:30,445 INFO L124 PetriNetUnfolderBase]: 4512/7430 cut-off events. [2024-06-27 17:52:30,445 INFO L125 PetriNetUnfolderBase]: For 252999/253002 co-relation queries the response was YES. [2024-06-27 17:52:30,510 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42345 conditions, 7430 events. 4512/7430 cut-off events. For 252999/253002 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 52730 event pairs, 770 based on Foata normal form. 6/7417 useless extension candidates. Maximal degree in co-relation 42201. Up to 5872 conditions per place. [2024-06-27 17:52:30,538 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 272 selfloop transitions, 201 changer transitions 0/486 dead transitions. [2024-06-27 17:52:30,538 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 486 transitions, 7180 flow [2024-06-27 17:52:30,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 17:52:30,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 17:52:30,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 296 transitions. [2024-06-27 17:52:30,539 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6577777777777778 [2024-06-27 17:52:30,539 INFO L175 Difference]: Start difference. First operand has 338 places, 430 transitions, 5814 flow. Second operand 10 states and 296 transitions. [2024-06-27 17:52:30,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 486 transitions, 7180 flow [2024-06-27 17:52:31,778 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 486 transitions, 6878 flow, removed 13 selfloop flow, removed 10 redundant places. [2024-06-27 17:52:31,783 INFO L231 Difference]: Finished difference. Result has 338 places, 430 transitions, 5958 flow [2024-06-27 17:52:31,784 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=5516, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=430, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=201, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5958, PETRI_PLACES=338, PETRI_TRANSITIONS=430} [2024-06-27 17:52:31,784 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 289 predicate places. [2024-06-27 17:52:31,784 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 430 transitions, 5958 flow [2024-06-27 17:52:31,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:31,784 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:52:31,784 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:52:31,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-27 17:52:31,785 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:52:31,785 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:52:31,785 INFO L85 PathProgramCache]: Analyzing trace with hash 923482350, now seen corresponding path program 23 times [2024-06-27 17:52:31,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:52:31,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203155571] [2024-06-27 17:52:31,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:52:31,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:52:31,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:52:31,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:52:31,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:52:31,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203155571] [2024-06-27 17:52:31,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203155571] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:52:31,868 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:52:31,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:52:31,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453612199] [2024-06-27 17:52:31,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:52:31,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:52:31,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:52:31,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:52:31,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:52:31,906 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:52:31,907 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 430 transitions, 5958 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:31,907 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:52:31,907 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:52:31,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:52:33,033 INFO L124 PetriNetUnfolderBase]: 4506/7419 cut-off events. [2024-06-27 17:52:33,034 INFO L125 PetriNetUnfolderBase]: For 245629/245647 co-relation queries the response was YES. [2024-06-27 17:52:33,105 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42648 conditions, 7419 events. 4506/7419 cut-off events. For 245629/245647 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 52583 event pairs, 810 based on Foata normal form. 14/7394 useless extension candidates. Maximal degree in co-relation 42504. Up to 5867 conditions per place. [2024-06-27 17:52:33,134 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 300 selfloop transitions, 154 changer transitions 0/467 dead transitions. [2024-06-27 17:52:33,134 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 467 transitions, 7098 flow [2024-06-27 17:52:33,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:52:33,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:52:33,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 211 transitions. [2024-06-27 17:52:33,135 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6698412698412698 [2024-06-27 17:52:33,135 INFO L175 Difference]: Start difference. First operand has 338 places, 430 transitions, 5958 flow. Second operand 7 states and 211 transitions. [2024-06-27 17:52:33,135 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 467 transitions, 7098 flow [2024-06-27 17:52:34,592 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 334 places, 467 transitions, 6720 flow, removed 13 selfloop flow, removed 10 redundant places. [2024-06-27 17:52:34,597 INFO L231 Difference]: Finished difference. Result has 335 places, 430 transitions, 5907 flow [2024-06-27 17:52:34,597 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=5588, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=430, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=154, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5907, PETRI_PLACES=335, PETRI_TRANSITIONS=430} [2024-06-27 17:52:34,598 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 286 predicate places. [2024-06-27 17:52:34,598 INFO L495 AbstractCegarLoop]: Abstraction has has 335 places, 430 transitions, 5907 flow [2024-06-27 17:52:34,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:34,598 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:52:34,598 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:52:34,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-27 17:52:34,598 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:52:34,599 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:52:34,599 INFO L85 PathProgramCache]: Analyzing trace with hash 1829161224, now seen corresponding path program 24 times [2024-06-27 17:52:34,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:52:34,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381064829] [2024-06-27 17:52:34,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:52:34,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:52:34,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:52:34,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:52:34,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:52:34,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381064829] [2024-06-27 17:52:34,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381064829] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:52:34,683 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:52:34,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:52:34,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323098356] [2024-06-27 17:52:34,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:52:34,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:52:34,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:52:34,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:52:34,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:52:34,733 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:52:34,734 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 335 places, 430 transitions, 5907 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:34,734 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:52:34,734 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:52:34,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:52:35,912 INFO L124 PetriNetUnfolderBase]: 4494/7404 cut-off events. [2024-06-27 17:52:35,912 INFO L125 PetriNetUnfolderBase]: For 223368/223371 co-relation queries the response was YES. [2024-06-27 17:52:35,977 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41917 conditions, 7404 events. 4494/7404 cut-off events. For 223368/223371 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 52540 event pairs, 772 based on Foata normal form. 6/7388 useless extension candidates. Maximal degree in co-relation 41775. Up to 5857 conditions per place. [2024-06-27 17:52:36,002 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 273 selfloop transitions, 199 changer transitions 0/485 dead transitions. [2024-06-27 17:52:36,003 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 485 transitions, 7119 flow [2024-06-27 17:52:36,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 17:52:36,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 17:52:36,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 297 transitions. [2024-06-27 17:52:36,004 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.66 [2024-06-27 17:52:36,004 INFO L175 Difference]: Start difference. First operand has 335 places, 430 transitions, 5907 flow. Second operand 10 states and 297 transitions. [2024-06-27 17:52:36,004 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 485 transitions, 7119 flow [2024-06-27 17:52:37,249 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 485 transitions, 6776 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-27 17:52:37,255 INFO L231 Difference]: Finished difference. Result has 338 places, 430 transitions, 5996 flow [2024-06-27 17:52:37,255 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=5566, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=430, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=199, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5996, PETRI_PLACES=338, PETRI_TRANSITIONS=430} [2024-06-27 17:52:37,255 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 289 predicate places. [2024-06-27 17:52:37,256 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 430 transitions, 5996 flow [2024-06-27 17:52:37,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:37,256 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:52:37,256 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:52:37,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-27 17:52:37,256 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:52:37,256 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:52:37,257 INFO L85 PathProgramCache]: Analyzing trace with hash -69130806, now seen corresponding path program 25 times [2024-06-27 17:52:37,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:52:37,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973217786] [2024-06-27 17:52:37,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:52:37,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:52:37,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:52:37,338 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:52:37,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:52:37,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973217786] [2024-06-27 17:52:37,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973217786] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:52:37,339 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:52:37,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:52:37,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426832564] [2024-06-27 17:52:37,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:52:37,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:52:37,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:52:37,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:52:37,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:52:37,394 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:52:37,394 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 430 transitions, 5996 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:37,394 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:52:37,394 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:52:37,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:52:38,485 INFO L124 PetriNetUnfolderBase]: 4502/7435 cut-off events. [2024-06-27 17:52:38,486 INFO L125 PetriNetUnfolderBase]: For 217077/217080 co-relation queries the response was YES. [2024-06-27 17:52:38,557 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42190 conditions, 7435 events. 4502/7435 cut-off events. For 217077/217080 co-relation queries the response was YES. Maximal size of possible extension queue 475. Compared 52892 event pairs, 794 based on Foata normal form. 4/7402 useless extension candidates. Maximal degree in co-relation 42048. Up to 5682 conditions per place. [2024-06-27 17:52:38,584 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 230 selfloop transitions, 248 changer transitions 0/491 dead transitions. [2024-06-27 17:52:38,585 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 491 transitions, 7270 flow [2024-06-27 17:52:38,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 17:52:38,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 17:52:38,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 300 transitions. [2024-06-27 17:52:38,585 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-06-27 17:52:38,586 INFO L175 Difference]: Start difference. First operand has 338 places, 430 transitions, 5996 flow. Second operand 10 states and 300 transitions. [2024-06-27 17:52:38,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 491 transitions, 7270 flow [2024-06-27 17:52:40,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 334 places, 491 transitions, 6715 flow, removed 11 selfloop flow, removed 13 redundant places. [2024-06-27 17:52:40,017 INFO L231 Difference]: Finished difference. Result has 336 places, 433 transitions, 6066 flow [2024-06-27 17:52:40,017 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=5447, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=430, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=245, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6066, PETRI_PLACES=336, PETRI_TRANSITIONS=433} [2024-06-27 17:52:40,017 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 287 predicate places. [2024-06-27 17:52:40,017 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 433 transitions, 6066 flow [2024-06-27 17:52:40,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:40,018 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:52:40,018 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:52:40,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-27 17:52:40,018 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:52:40,018 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:52:40,018 INFO L85 PathProgramCache]: Analyzing trace with hash -558257250, now seen corresponding path program 2 times [2024-06-27 17:52:40,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:52:40,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687903982] [2024-06-27 17:52:40,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:52:40,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:52:40,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:52:40,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:52:40,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:52:40,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687903982] [2024-06-27 17:52:40,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687903982] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:52:40,094 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:52:40,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:52:40,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722604294] [2024-06-27 17:52:40,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:52:40,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:52:40,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:52:40,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:52:40,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:52:40,147 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:52:40,148 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 433 transitions, 6066 flow. Second operand has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:40,148 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:52:40,148 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:52:40,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:52:41,339 INFO L124 PetriNetUnfolderBase]: 4548/7627 cut-off events. [2024-06-27 17:52:41,340 INFO L125 PetriNetUnfolderBase]: For 217369/217369 co-relation queries the response was YES. [2024-06-27 17:52:41,407 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42652 conditions, 7627 events. 4548/7627 cut-off events. For 217369/217369 co-relation queries the response was YES. Maximal size of possible extension queue 480. Compared 55153 event pairs, 1259 based on Foata normal form. 6/7530 useless extension candidates. Maximal degree in co-relation 42510. Up to 6403 conditions per place. [2024-06-27 17:52:41,435 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 415 selfloop transitions, 44 changer transitions 0/472 dead transitions. [2024-06-27 17:52:41,435 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 472 transitions, 7138 flow [2024-06-27 17:52:41,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:52:41,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:52:41,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 179 transitions. [2024-06-27 17:52:41,436 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.662962962962963 [2024-06-27 17:52:41,436 INFO L175 Difference]: Start difference. First operand has 336 places, 433 transitions, 6066 flow. Second operand 6 states and 179 transitions. [2024-06-27 17:52:41,436 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 472 transitions, 7138 flow [2024-06-27 17:52:42,607 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 472 transitions, 6672 flow, removed 9 selfloop flow, removed 9 redundant places. [2024-06-27 17:52:42,612 INFO L231 Difference]: Finished difference. Result has 334 places, 436 transitions, 5735 flow [2024-06-27 17:52:42,612 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=5600, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=433, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=390, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5735, PETRI_PLACES=334, PETRI_TRANSITIONS=436} [2024-06-27 17:52:42,612 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 285 predicate places. [2024-06-27 17:52:42,613 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 436 transitions, 5735 flow [2024-06-27 17:52:42,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:42,613 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:52:42,613 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:52:42,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-27 17:52:42,613 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:52:42,613 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:52:42,614 INFO L85 PathProgramCache]: Analyzing trace with hash -115428450, now seen corresponding path program 3 times [2024-06-27 17:52:42,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:52:42,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039665235] [2024-06-27 17:52:42,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:52:42,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:52:42,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:52:42,686 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:52:42,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:52:42,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039665235] [2024-06-27 17:52:42,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039665235] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:52:42,687 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:52:42,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:52:42,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141977333] [2024-06-27 17:52:42,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:52:42,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:52:42,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:52:42,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:52:42,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:52:42,724 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:52:42,724 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 436 transitions, 5735 flow. Second operand has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:42,724 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:52:42,725 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:52:42,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:52:43,813 INFO L124 PetriNetUnfolderBase]: 4535/7409 cut-off events. [2024-06-27 17:52:43,813 INFO L125 PetriNetUnfolderBase]: For 186214/186214 co-relation queries the response was YES. [2024-06-27 17:52:43,883 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41068 conditions, 7409 events. 4535/7409 cut-off events. For 186214/186214 co-relation queries the response was YES. Maximal size of possible extension queue 485. Compared 52209 event pairs, 719 based on Foata normal form. 6/7375 useless extension candidates. Maximal degree in co-relation 40925. Up to 5852 conditions per place. [2024-06-27 17:52:43,909 INFO L140 encePairwiseOnDemand]: 38/45 looper letters, 412 selfloop transitions, 44 changer transitions 0/469 dead transitions. [2024-06-27 17:52:43,910 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 469 transitions, 6779 flow [2024-06-27 17:52:43,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:52:43,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:52:43,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 170 transitions. [2024-06-27 17:52:43,911 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6296296296296297 [2024-06-27 17:52:43,911 INFO L175 Difference]: Start difference. First operand has 334 places, 436 transitions, 5735 flow. Second operand 6 states and 170 transitions. [2024-06-27 17:52:43,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 469 transitions, 6779 flow [2024-06-27 17:52:44,949 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 469 transitions, 6729 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-27 17:52:44,954 INFO L231 Difference]: Finished difference. Result has 339 places, 438 transitions, 5798 flow [2024-06-27 17:52:44,955 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=5685, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=436, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=393, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5798, PETRI_PLACES=339, PETRI_TRANSITIONS=438} [2024-06-27 17:52:44,955 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 290 predicate places. [2024-06-27 17:52:44,955 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 438 transitions, 5798 flow [2024-06-27 17:52:44,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:44,955 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:52:44,955 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:52:44,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-27 17:52:44,956 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:52:44,956 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:52:44,956 INFO L85 PathProgramCache]: Analyzing trace with hash 1914831594, now seen corresponding path program 1 times [2024-06-27 17:52:44,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:52:44,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069458220] [2024-06-27 17:52:44,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:52:44,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:52:44,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:52:45,039 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:52:45,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:52:45,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069458220] [2024-06-27 17:52:45,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069458220] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:52:45,039 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:52:45,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:52:45,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668097434] [2024-06-27 17:52:45,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:52:45,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:52:45,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:52:45,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:52:45,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:52:45,082 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:52:45,083 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 438 transitions, 5798 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:45,083 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:52:45,083 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:52:45,083 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:52:46,339 INFO L124 PetriNetUnfolderBase]: 4834/7955 cut-off events. [2024-06-27 17:52:46,339 INFO L125 PetriNetUnfolderBase]: For 251458/251476 co-relation queries the response was YES. [2024-06-27 17:52:46,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45651 conditions, 7955 events. 4834/7955 cut-off events. For 251458/251476 co-relation queries the response was YES. Maximal size of possible extension queue 531. Compared 57027 event pairs, 739 based on Foata normal form. 24/7943 useless extension candidates. Maximal degree in co-relation 45505. Up to 5993 conditions per place. [2024-06-27 17:52:46,439 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 386 selfloop transitions, 85 changer transitions 0/484 dead transitions. [2024-06-27 17:52:46,439 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 484 transitions, 7272 flow [2024-06-27 17:52:46,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:52:46,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:52:46,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 205 transitions. [2024-06-27 17:52:46,440 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6507936507936508 [2024-06-27 17:52:46,440 INFO L175 Difference]: Start difference. First operand has 339 places, 438 transitions, 5798 flow. Second operand 7 states and 205 transitions. [2024-06-27 17:52:46,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 484 transitions, 7272 flow [2024-06-27 17:52:47,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 340 places, 484 transitions, 7117 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-27 17:52:47,557 INFO L231 Difference]: Finished difference. Result has 342 places, 443 transitions, 5936 flow [2024-06-27 17:52:47,557 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=5643, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=438, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=355, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5936, PETRI_PLACES=342, PETRI_TRANSITIONS=443} [2024-06-27 17:52:47,557 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 293 predicate places. [2024-06-27 17:52:47,558 INFO L495 AbstractCegarLoop]: Abstraction has has 342 places, 443 transitions, 5936 flow [2024-06-27 17:52:47,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:47,558 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:52:47,558 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:52:47,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-27 17:52:47,558 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:52:47,558 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:52:47,559 INFO L85 PathProgramCache]: Analyzing trace with hash -2024986616, now seen corresponding path program 2 times [2024-06-27 17:52:47,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:52:47,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385641073] [2024-06-27 17:52:47,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:52:47,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:52:47,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:52:47,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:52:47,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:52:47,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385641073] [2024-06-27 17:52:47,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385641073] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:52:47,643 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:52:47,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:52:47,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507809018] [2024-06-27 17:52:47,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:52:47,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:52:47,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:52:47,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:52:47,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:52:47,686 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:52:47,686 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 342 places, 443 transitions, 5936 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:47,686 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:52:47,687 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:52:47,687 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:52:48,981 INFO L124 PetriNetUnfolderBase]: 4962/8512 cut-off events. [2024-06-27 17:52:48,981 INFO L125 PetriNetUnfolderBase]: For 274421/274439 co-relation queries the response was YES. [2024-06-27 17:52:49,069 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47156 conditions, 8512 events. 4962/8512 cut-off events. For 274421/274439 co-relation queries the response was YES. Maximal size of possible extension queue 552. Compared 63464 event pairs, 1260 based on Foata normal form. 28/8499 useless extension candidates. Maximal degree in co-relation 47010. Up to 6825 conditions per place. [2024-06-27 17:52:49,104 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 378 selfloop transitions, 82 changer transitions 0/473 dead transitions. [2024-06-27 17:52:49,104 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 473 transitions, 6986 flow [2024-06-27 17:52:49,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:52:49,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:52:49,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 196 transitions. [2024-06-27 17:52:49,105 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6222222222222222 [2024-06-27 17:52:49,105 INFO L175 Difference]: Start difference. First operand has 342 places, 443 transitions, 5936 flow. Second operand 7 states and 196 transitions. [2024-06-27 17:52:49,105 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 473 transitions, 6986 flow [2024-06-27 17:52:50,229 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 473 transitions, 6866 flow, removed 20 selfloop flow, removed 2 redundant places. [2024-06-27 17:52:50,234 INFO L231 Difference]: Finished difference. Result has 347 places, 445 transitions, 6036 flow [2024-06-27 17:52:50,234 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=5816, PETRI_DIFFERENCE_MINUEND_PLACES=340, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=443, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=361, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6036, PETRI_PLACES=347, PETRI_TRANSITIONS=445} [2024-06-27 17:52:50,235 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 298 predicate places. [2024-06-27 17:52:50,235 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 445 transitions, 6036 flow [2024-06-27 17:52:50,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:50,235 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:52:50,235 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:52:50,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-27 17:52:50,235 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:52:50,236 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:52:50,236 INFO L85 PathProgramCache]: Analyzing trace with hash -2025134486, now seen corresponding path program 3 times [2024-06-27 17:52:50,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:52:50,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714155640] [2024-06-27 17:52:50,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:52:50,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:52:50,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:52:50,309 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 17:52:50,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:52:50,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714155640] [2024-06-27 17:52:50,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714155640] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:52:50,310 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:52:50,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:52:50,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528372359] [2024-06-27 17:52:50,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:52:50,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:52:50,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:52:50,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:52:50,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:52:50,358 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:52:50,358 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 445 transitions, 6036 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:50,358 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:52:50,358 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:52:50,358 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:52:51,716 INFO L124 PetriNetUnfolderBase]: 5166/8844 cut-off events. [2024-06-27 17:52:51,716 INFO L125 PetriNetUnfolderBase]: For 302352/302370 co-relation queries the response was YES. [2024-06-27 17:52:51,806 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50138 conditions, 8844 events. 5166/8844 cut-off events. For 302352/302370 co-relation queries the response was YES. Maximal size of possible extension queue 580. Compared 66278 event pairs, 1273 based on Foata normal form. 24/8824 useless extension candidates. Maximal degree in co-relation 49990. Up to 6827 conditions per place. [2024-06-27 17:52:51,842 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 388 selfloop transitions, 80 changer transitions 0/481 dead transitions. [2024-06-27 17:52:51,843 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 481 transitions, 7304 flow [2024-06-27 17:52:51,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:52:51,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:52:51,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 199 transitions. [2024-06-27 17:52:51,844 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6317460317460317 [2024-06-27 17:52:51,844 INFO L175 Difference]: Start difference. First operand has 347 places, 445 transitions, 6036 flow. Second operand 7 states and 199 transitions. [2024-06-27 17:52:51,844 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 481 transitions, 7304 flow [2024-06-27 17:52:53,131 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 348 places, 481 transitions, 7114 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-27 17:52:53,137 INFO L231 Difference]: Finished difference. Result has 350 places, 449 transitions, 6127 flow [2024-06-27 17:52:53,137 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=5846, PETRI_DIFFERENCE_MINUEND_PLACES=342, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=445, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=366, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6127, PETRI_PLACES=350, PETRI_TRANSITIONS=449} [2024-06-27 17:52:53,137 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 301 predicate places. [2024-06-27 17:52:53,137 INFO L495 AbstractCegarLoop]: Abstraction has has 350 places, 449 transitions, 6127 flow [2024-06-27 17:52:53,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:53,137 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:52:53,138 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:52:53,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-27 17:52:53,138 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:52:53,138 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:52:53,138 INFO L85 PathProgramCache]: Analyzing trace with hash 598589640, now seen corresponding path program 4 times [2024-06-27 17:52:53,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:52:53,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147464196] [2024-06-27 17:52:53,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:52:53,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:52:53,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:52:53,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:52:53,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:52:53,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147464196] [2024-06-27 17:52:53,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147464196] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:52:53,229 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:52:53,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:52:53,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028199913] [2024-06-27 17:52:53,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:52:53,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:52:53,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:52:53,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:52:53,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:52:53,294 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:52:53,295 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 350 places, 449 transitions, 6127 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:53,295 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:52:53,295 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:52:53,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:52:54,652 INFO L124 PetriNetUnfolderBase]: 5294/9073 cut-off events. [2024-06-27 17:52:54,653 INFO L125 PetriNetUnfolderBase]: For 324362/324380 co-relation queries the response was YES. [2024-06-27 17:52:54,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51554 conditions, 9073 events. 5294/9073 cut-off events. For 324362/324380 co-relation queries the response was YES. Maximal size of possible extension queue 597. Compared 68339 event pairs, 1353 based on Foata normal form. 28/9055 useless extension candidates. Maximal degree in co-relation 51404. Up to 7389 conditions per place. [2024-06-27 17:52:54,783 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 392 selfloop transitions, 71 changer transitions 0/476 dead transitions. [2024-06-27 17:52:54,784 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 476 transitions, 7185 flow [2024-06-27 17:52:54,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:52:54,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:52:54,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 171 transitions. [2024-06-27 17:52:54,785 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6333333333333333 [2024-06-27 17:52:54,785 INFO L175 Difference]: Start difference. First operand has 350 places, 449 transitions, 6127 flow. Second operand 6 states and 171 transitions. [2024-06-27 17:52:54,785 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 476 transitions, 7185 flow [2024-06-27 17:52:56,551 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 352 places, 476 transitions, 7053 flow, removed 22 selfloop flow, removed 3 redundant places. [2024-06-27 17:52:56,556 INFO L231 Difference]: Finished difference. Result has 353 places, 451 transitions, 6201 flow [2024-06-27 17:52:56,556 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=5995, PETRI_DIFFERENCE_MINUEND_PLACES=347, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=449, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=378, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6201, PETRI_PLACES=353, PETRI_TRANSITIONS=451} [2024-06-27 17:52:56,556 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 304 predicate places. [2024-06-27 17:52:56,556 INFO L495 AbstractCegarLoop]: Abstraction has has 353 places, 451 transitions, 6201 flow [2024-06-27 17:52:56,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:56,556 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:52:56,557 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:52:56,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-27 17:52:56,557 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:52:56,557 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:52:56,557 INFO L85 PathProgramCache]: Analyzing trace with hash 603952020, now seen corresponding path program 5 times [2024-06-27 17:52:56,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:52:56,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250962800] [2024-06-27 17:52:56,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:52:56,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:52:56,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:52:56,639 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:52:56,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:52:56,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250962800] [2024-06-27 17:52:56,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250962800] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:52:56,640 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:52:56,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:52:56,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327549851] [2024-06-27 17:52:56,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:52:56,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:52:56,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:52:56,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:52:56,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:52:56,682 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:52:56,683 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 451 transitions, 6201 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:56,683 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:52:56,683 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:52:56,683 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:52:58,314 INFO L124 PetriNetUnfolderBase]: 5399/8913 cut-off events. [2024-06-27 17:52:58,315 INFO L125 PetriNetUnfolderBase]: For 325578/325596 co-relation queries the response was YES. [2024-06-27 17:52:58,582 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52359 conditions, 8913 events. 5399/8913 cut-off events. For 325578/325596 co-relation queries the response was YES. Maximal size of possible extension queue 613. Compared 65333 event pairs, 1048 based on Foata normal form. 28/8899 useless extension candidates. Maximal degree in co-relation 52207. Up to 7548 conditions per place. [2024-06-27 17:52:58,615 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 388 selfloop transitions, 83 changer transitions 0/484 dead transitions. [2024-06-27 17:52:58,615 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 360 places, 484 transitions, 7291 flow [2024-06-27 17:52:58,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:52:58,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:52:58,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 220 transitions. [2024-06-27 17:52:58,616 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6111111111111112 [2024-06-27 17:52:58,616 INFO L175 Difference]: Start difference. First operand has 353 places, 451 transitions, 6201 flow. Second operand 8 states and 220 transitions. [2024-06-27 17:52:58,616 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 360 places, 484 transitions, 7291 flow [2024-06-27 17:53:00,043 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 356 places, 484 transitions, 7115 flow, removed 19 selfloop flow, removed 4 redundant places. [2024-06-27 17:53:00,048 INFO L231 Difference]: Finished difference. Result has 357 places, 453 transitions, 6259 flow [2024-06-27 17:53:00,049 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=6025, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=451, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=368, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6259, PETRI_PLACES=357, PETRI_TRANSITIONS=453} [2024-06-27 17:53:00,049 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 308 predicate places. [2024-06-27 17:53:00,049 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 453 transitions, 6259 flow [2024-06-27 17:53:00,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:00,049 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:53:00,049 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:53:00,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-27 17:53:00,050 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:53:00,050 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:53:00,050 INFO L85 PathProgramCache]: Analyzing trace with hash 598441770, now seen corresponding path program 6 times [2024-06-27 17:53:00,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:53:00,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752785583] [2024-06-27 17:53:00,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:53:00,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:53:00,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:53:00,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:53:00,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:53:00,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752785583] [2024-06-27 17:53:00,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752785583] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:53:00,147 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:53:00,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:53:00,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643788939] [2024-06-27 17:53:00,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:53:00,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:53:00,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:53:00,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:53:00,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:53:00,218 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:53:00,218 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 453 transitions, 6259 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:00,218 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:53:00,218 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:53:00,218 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:53:02,051 INFO L124 PetriNetUnfolderBase]: 5439/9297 cut-off events. [2024-06-27 17:53:02,052 INFO L125 PetriNetUnfolderBase]: For 311070/311088 co-relation queries the response was YES. [2024-06-27 17:53:02,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52478 conditions, 9297 events. 5439/9297 cut-off events. For 311070/311088 co-relation queries the response was YES. Maximal size of possible extension queue 620. Compared 70284 event pairs, 1222 based on Foata normal form. 24/9273 useless extension candidates. Maximal degree in co-relation 52325. Up to 6975 conditions per place. [2024-06-27 17:53:02,183 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 398 selfloop transitions, 77 changer transitions 0/488 dead transitions. [2024-06-27 17:53:02,183 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 488 transitions, 7539 flow [2024-06-27 17:53:02,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:53:02,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:53:02,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 178 transitions. [2024-06-27 17:53:02,184 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6592592592592592 [2024-06-27 17:53:02,184 INFO L175 Difference]: Start difference. First operand has 357 places, 453 transitions, 6259 flow. Second operand 6 states and 178 transitions. [2024-06-27 17:53:02,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 488 transitions, 7539 flow [2024-06-27 17:53:03,635 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 356 places, 488 transitions, 7335 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-27 17:53:03,640 INFO L231 Difference]: Finished difference. Result has 358 places, 456 transitions, 6338 flow [2024-06-27 17:53:03,640 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=6055, PETRI_DIFFERENCE_MINUEND_PLACES=351, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=453, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=377, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6338, PETRI_PLACES=358, PETRI_TRANSITIONS=456} [2024-06-27 17:53:03,640 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 309 predicate places. [2024-06-27 17:53:03,640 INFO L495 AbstractCegarLoop]: Abstraction has has 358 places, 456 transitions, 6338 flow [2024-06-27 17:53:03,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:03,641 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:53:03,641 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:53:03,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-27 17:53:03,641 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:53:03,641 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:53:03,641 INFO L85 PathProgramCache]: Analyzing trace with hash 604167222, now seen corresponding path program 1 times [2024-06-27 17:53:03,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:53:03,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158249909] [2024-06-27 17:53:03,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:53:03,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:53:03,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:53:03,730 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:53:03,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:53:03,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158249909] [2024-06-27 17:53:03,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158249909] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:53:03,731 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:53:03,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:53:03,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089954850] [2024-06-27 17:53:03,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:53:03,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:53:03,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:53:03,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:53:03,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:53:03,779 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:53:03,779 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 358 places, 456 transitions, 6338 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:03,779 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:53:03,779 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:53:03,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:53:05,662 INFO L124 PetriNetUnfolderBase]: 5472/9058 cut-off events. [2024-06-27 17:53:05,672 INFO L125 PetriNetUnfolderBase]: For 299740/299758 co-relation queries the response was YES. [2024-06-27 17:53:05,764 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51961 conditions, 9058 events. 5472/9058 cut-off events. For 299740/299758 co-relation queries the response was YES. Maximal size of possible extension queue 622. Compared 66734 event pairs, 988 based on Foata normal form. 24/9040 useless extension candidates. Maximal degree in co-relation 51806. Up to 7339 conditions per place. [2024-06-27 17:53:05,797 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 386 selfloop transitions, 92 changer transitions 0/491 dead transitions. [2024-06-27 17:53:05,797 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 365 places, 491 transitions, 7424 flow [2024-06-27 17:53:05,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:53:05,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:53:05,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 223 transitions. [2024-06-27 17:53:05,799 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6194444444444445 [2024-06-27 17:53:05,799 INFO L175 Difference]: Start difference. First operand has 358 places, 456 transitions, 6338 flow. Second operand 8 states and 223 transitions. [2024-06-27 17:53:05,799 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 365 places, 491 transitions, 7424 flow [2024-06-27 17:53:07,260 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 491 transitions, 7150 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-06-27 17:53:07,265 INFO L231 Difference]: Finished difference. Result has 361 places, 457 transitions, 6277 flow [2024-06-27 17:53:07,266 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=6064, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=456, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=364, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6277, PETRI_PLACES=361, PETRI_TRANSITIONS=457} [2024-06-27 17:53:07,266 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 312 predicate places. [2024-06-27 17:53:07,266 INFO L495 AbstractCegarLoop]: Abstraction has has 361 places, 457 transitions, 6277 flow [2024-06-27 17:53:07,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:07,266 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:53:07,267 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:53:07,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-27 17:53:07,267 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:53:07,267 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:53:07,267 INFO L85 PathProgramCache]: Analyzing trace with hash -159431250, now seen corresponding path program 1 times [2024-06-27 17:53:07,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:53:07,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445646460] [2024-06-27 17:53:07,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:53:07,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:53:07,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:53:07,421 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:53:07,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:53:07,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445646460] [2024-06-27 17:53:07,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445646460] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:53:07,422 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:53:07,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:53:07,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873711952] [2024-06-27 17:53:07,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:53:07,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:53:07,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:53:07,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:53:07,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:53:07,460 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:53:07,461 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 361 places, 457 transitions, 6277 flow. Second operand has 8 states, 8 states have (on average 19.0) internal successors, (152), 8 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:07,461 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:53:07,461 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:53:07,461 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:53:09,117 INFO L124 PetriNetUnfolderBase]: 5469/8976 cut-off events. [2024-06-27 17:53:09,117 INFO L125 PetriNetUnfolderBase]: For 268963/268981 co-relation queries the response was YES. [2024-06-27 17:53:09,207 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50779 conditions, 8976 events. 5469/8976 cut-off events. For 268963/268981 co-relation queries the response was YES. Maximal size of possible extension queue 620. Compared 65773 event pairs, 1118 based on Foata normal form. 11/8927 useless extension candidates. Maximal degree in co-relation 50624. Up to 6956 conditions per place. [2024-06-27 17:53:09,244 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 271 selfloop transitions, 211 changer transitions 0/495 dead transitions. [2024-06-27 17:53:09,245 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 495 transitions, 7617 flow [2024-06-27 17:53:09,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:53:09,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:53:09,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 230 transitions. [2024-06-27 17:53:09,246 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6388888888888888 [2024-06-27 17:53:09,246 INFO L175 Difference]: Start difference. First operand has 361 places, 457 transitions, 6277 flow. Second operand 8 states and 230 transitions. [2024-06-27 17:53:09,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 495 transitions, 7617 flow [2024-06-27 17:53:11,015 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 495 transitions, 7371 flow, removed 22 selfloop flow, removed 7 redundant places. [2024-06-27 17:53:11,020 INFO L231 Difference]: Finished difference. Result has 362 places, 457 transitions, 6459 flow [2024-06-27 17:53:11,021 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=6031, PETRI_DIFFERENCE_MINUEND_PLACES=354, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=457, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=211, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6459, PETRI_PLACES=362, PETRI_TRANSITIONS=457} [2024-06-27 17:53:11,021 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 313 predicate places. [2024-06-27 17:53:11,021 INFO L495 AbstractCegarLoop]: Abstraction has has 362 places, 457 transitions, 6459 flow [2024-06-27 17:53:11,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.0) internal successors, (152), 8 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:11,021 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:53:11,022 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:53:11,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-27 17:53:11,022 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:53:11,022 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:53:11,022 INFO L85 PathProgramCache]: Analyzing trace with hash -1812217850, now seen corresponding path program 2 times [2024-06-27 17:53:11,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:53:11,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696246500] [2024-06-27 17:53:11,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:53:11,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:53:11,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:53:11,110 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:53:11,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:53:11,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696246500] [2024-06-27 17:53:11,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696246500] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:53:11,110 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:53:11,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:53:11,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126231687] [2024-06-27 17:53:11,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:53:11,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:53:11,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:53:11,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:53:11,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:53:11,153 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:53:11,154 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 457 transitions, 6459 flow. Second operand has 8 states, 8 states have (on average 19.0) internal successors, (152), 8 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:11,154 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:53:11,154 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:53:11,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:53:12,735 INFO L124 PetriNetUnfolderBase]: 5494/8996 cut-off events. [2024-06-27 17:53:12,735 INFO L125 PetriNetUnfolderBase]: For 274385/274403 co-relation queries the response was YES. [2024-06-27 17:53:12,824 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51028 conditions, 8996 events. 5494/8996 cut-off events. For 274385/274403 co-relation queries the response was YES. Maximal size of possible extension queue 623. Compared 65727 event pairs, 1053 based on Foata normal form. 13/8957 useless extension candidates. Maximal degree in co-relation 50873. Up to 7686 conditions per place. [2024-06-27 17:53:13,038 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 370 selfloop transitions, 114 changer transitions 0/497 dead transitions. [2024-06-27 17:53:13,038 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 497 transitions, 7739 flow [2024-06-27 17:53:13,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:53:13,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:53:13,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 224 transitions. [2024-06-27 17:53:13,039 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6222222222222222 [2024-06-27 17:53:13,039 INFO L175 Difference]: Start difference. First operand has 362 places, 457 transitions, 6459 flow. Second operand 8 states and 224 transitions. [2024-06-27 17:53:13,039 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 497 transitions, 7739 flow [2024-06-27 17:53:14,818 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 497 transitions, 7019 flow, removed 41 selfloop flow, removed 8 redundant places. [2024-06-27 17:53:14,822 INFO L231 Difference]: Finished difference. Result has 362 places, 463 transitions, 6069 flow [2024-06-27 17:53:14,823 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=5787, PETRI_DIFFERENCE_MINUEND_PLACES=354, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=457, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=346, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6069, PETRI_PLACES=362, PETRI_TRANSITIONS=463} [2024-06-27 17:53:14,823 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 313 predicate places. [2024-06-27 17:53:14,823 INFO L495 AbstractCegarLoop]: Abstraction has has 362 places, 463 transitions, 6069 flow [2024-06-27 17:53:14,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.0) internal successors, (152), 8 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:14,823 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:53:14,823 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:53:14,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-27 17:53:14,824 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:53:14,824 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:53:14,824 INFO L85 PathProgramCache]: Analyzing trace with hash -1812212270, now seen corresponding path program 3 times [2024-06-27 17:53:14,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:53:14,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124661518] [2024-06-27 17:53:14,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:53:14,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:53:14,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:53:14,906 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:53:14,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:53:14,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124661518] [2024-06-27 17:53:14,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124661518] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:53:14,906 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:53:14,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:53:14,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827294316] [2024-06-27 17:53:14,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:53:14,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:53:14,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:53:14,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:53:14,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:53:14,947 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:53:14,947 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 463 transitions, 6069 flow. Second operand has 8 states, 8 states have (on average 19.0) internal successors, (152), 8 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:14,947 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:53:14,947 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:53:14,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:53:16,571 INFO L124 PetriNetUnfolderBase]: 5491/8992 cut-off events. [2024-06-27 17:53:16,571 INFO L125 PetriNetUnfolderBase]: For 267069/267087 co-relation queries the response was YES. [2024-06-27 17:53:16,663 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49854 conditions, 8992 events. 5491/8992 cut-off events. For 267069/267087 co-relation queries the response was YES. Maximal size of possible extension queue 623. Compared 65685 event pairs, 1063 based on Foata normal form. 13/8952 useless extension candidates. Maximal degree in co-relation 49701. Up to 7683 conditions per place. [2024-06-27 17:53:16,699 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 374 selfloop transitions, 115 changer transitions 0/502 dead transitions. [2024-06-27 17:53:16,699 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 502 transitions, 7135 flow [2024-06-27 17:53:16,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 17:53:16,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 17:53:16,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 267 transitions. [2024-06-27 17:53:16,700 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5933333333333334 [2024-06-27 17:53:16,700 INFO L175 Difference]: Start difference. First operand has 362 places, 463 transitions, 6069 flow. Second operand 10 states and 267 transitions. [2024-06-27 17:53:16,701 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 502 transitions, 7135 flow [2024-06-27 17:53:18,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 502 transitions, 6998 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-27 17:53:18,491 INFO L231 Difference]: Finished difference. Result has 368 places, 463 transitions, 6168 flow [2024-06-27 17:53:18,491 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=5932, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=463, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=348, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6168, PETRI_PLACES=368, PETRI_TRANSITIONS=463} [2024-06-27 17:53:18,492 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 319 predicate places. [2024-06-27 17:53:18,492 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 463 transitions, 6168 flow [2024-06-27 17:53:18,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.0) internal successors, (152), 8 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:18,492 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:53:18,492 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:53:18,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-27 17:53:18,492 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:53:18,493 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:53:18,493 INFO L85 PathProgramCache]: Analyzing trace with hash -608750796, now seen corresponding path program 4 times [2024-06-27 17:53:18,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:53:18,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603107067] [2024-06-27 17:53:18,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:53:18,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:53:18,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:53:18,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:53:18,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:53:18,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603107067] [2024-06-27 17:53:18,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603107067] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:53:18,573 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:53:18,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:53:18,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110953583] [2024-06-27 17:53:18,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:53:18,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:53:18,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:53:18,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:53:18,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:53:18,614 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:53:18,614 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 463 transitions, 6168 flow. Second operand has 8 states, 8 states have (on average 19.0) internal successors, (152), 8 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:18,614 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:53:18,615 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:53:18,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:53:20,497 INFO L124 PetriNetUnfolderBase]: 5530/9078 cut-off events. [2024-06-27 17:53:20,497 INFO L125 PetriNetUnfolderBase]: For 279780/279798 co-relation queries the response was YES. [2024-06-27 17:53:20,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50766 conditions, 9078 events. 5530/9078 cut-off events. For 279780/279798 co-relation queries the response was YES. Maximal size of possible extension queue 626. Compared 66498 event pairs, 1062 based on Foata normal form. 13/9039 useless extension candidates. Maximal degree in co-relation 50611. Up to 7680 conditions per place. [2024-06-27 17:53:20,621 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 362 selfloop transitions, 134 changer transitions 0/509 dead transitions. [2024-06-27 17:53:20,621 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 377 places, 509 transitions, 7470 flow [2024-06-27 17:53:20,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 17:53:20,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 17:53:20,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 265 transitions. [2024-06-27 17:53:20,622 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5888888888888889 [2024-06-27 17:53:20,622 INFO L175 Difference]: Start difference. First operand has 368 places, 463 transitions, 6168 flow. Second operand 10 states and 265 transitions. [2024-06-27 17:53:20,622 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 377 places, 509 transitions, 7470 flow [2024-06-27 17:53:22,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 368 places, 509 transitions, 7236 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-27 17:53:22,781 INFO L231 Difference]: Finished difference. Result has 370 places, 472 transitions, 6319 flow [2024-06-27 17:53:22,781 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=5934, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=463, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=332, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6319, PETRI_PLACES=370, PETRI_TRANSITIONS=472} [2024-06-27 17:53:22,782 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 321 predicate places. [2024-06-27 17:53:22,782 INFO L495 AbstractCegarLoop]: Abstraction has has 370 places, 472 transitions, 6319 flow [2024-06-27 17:53:22,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.0) internal successors, (152), 8 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:22,782 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:53:22,782 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:53:22,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-27 17:53:22,782 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:53:22,783 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:53:22,783 INFO L85 PathProgramCache]: Analyzing trace with hash -335829256, now seen corresponding path program 5 times [2024-06-27 17:53:22,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:53:22,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315488298] [2024-06-27 17:53:22,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:53:22,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:53:22,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:53:22,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:53:22,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:53:22,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315488298] [2024-06-27 17:53:22,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315488298] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:53:22,869 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:53:22,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:53:22,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862286554] [2024-06-27 17:53:22,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:53:22,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:53:22,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:53:22,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:53:22,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:53:22,912 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:53:22,912 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 370 places, 472 transitions, 6319 flow. Second operand has 8 states, 8 states have (on average 19.0) internal successors, (152), 8 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:22,912 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:53:22,912 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:53:22,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:53:24,729 INFO L124 PetriNetUnfolderBase]: 5541/9076 cut-off events. [2024-06-27 17:53:24,729 INFO L125 PetriNetUnfolderBase]: For 285200/285218 co-relation queries the response was YES. [2024-06-27 17:53:24,823 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51089 conditions, 9076 events. 5541/9076 cut-off events. For 285200/285218 co-relation queries the response was YES. Maximal size of possible extension queue 627. Compared 66457 event pairs, 1063 based on Foata normal form. 13/9036 useless extension candidates. Maximal degree in co-relation 50932. Up to 7692 conditions per place. [2024-06-27 17:53:24,861 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 367 selfloop transitions, 130 changer transitions 0/510 dead transitions. [2024-06-27 17:53:24,861 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 510 transitions, 7727 flow [2024-06-27 17:53:24,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 17:53:24,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 17:53:24,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 246 transitions. [2024-06-27 17:53:24,862 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6074074074074074 [2024-06-27 17:53:24,862 INFO L175 Difference]: Start difference. First operand has 370 places, 472 transitions, 6319 flow. Second operand 9 states and 246 transitions. [2024-06-27 17:53:24,863 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 510 transitions, 7727 flow [2024-06-27 17:53:26,868 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 372 places, 510 transitions, 7556 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-27 17:53:26,873 INFO L231 Difference]: Finished difference. Result has 373 places, 475 transitions, 6450 flow [2024-06-27 17:53:26,874 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=6152, PETRI_DIFFERENCE_MINUEND_PLACES=364, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=472, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=345, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6450, PETRI_PLACES=373, PETRI_TRANSITIONS=475} [2024-06-27 17:53:26,874 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 324 predicate places. [2024-06-27 17:53:26,874 INFO L495 AbstractCegarLoop]: Abstraction has has 373 places, 475 transitions, 6450 flow [2024-06-27 17:53:26,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.0) internal successors, (152), 8 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:26,874 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:53:26,876 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:53:26,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-27 17:53:26,876 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:53:26,876 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:53:26,876 INFO L85 PathProgramCache]: Analyzing trace with hash -1668321740, now seen corresponding path program 6 times [2024-06-27 17:53:26,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:53:26,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969447894] [2024-06-27 17:53:26,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:53:26,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:53:26,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:53:26,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:53:26,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:53:26,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969447894] [2024-06-27 17:53:26,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969447894] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:53:26,963 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:53:26,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:53:26,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129304875] [2024-06-27 17:53:26,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:53:26,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:53:26,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:53:26,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:53:26,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:53:27,006 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:53:27,007 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 475 transitions, 6450 flow. Second operand has 8 states, 8 states have (on average 19.0) internal successors, (152), 8 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:27,007 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:53:27,007 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:53:27,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:53:28,823 INFO L124 PetriNetUnfolderBase]: 5538/9093 cut-off events. [2024-06-27 17:53:28,823 INFO L125 PetriNetUnfolderBase]: For 289665/289683 co-relation queries the response was YES. [2024-06-27 17:53:28,935 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51545 conditions, 9093 events. 5538/9093 cut-off events. For 289665/289683 co-relation queries the response was YES. Maximal size of possible extension queue 627. Compared 66750 event pairs, 1072 based on Foata normal form. 13/9053 useless extension candidates. Maximal degree in co-relation 51386. Up to 7689 conditions per place. [2024-06-27 17:53:28,973 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 371 selfloop transitions, 131 changer transitions 0/515 dead transitions. [2024-06-27 17:53:28,973 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 383 places, 515 transitions, 7694 flow [2024-06-27 17:53:28,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 17:53:28,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 17:53:28,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 291 transitions. [2024-06-27 17:53:29,187 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5878787878787879 [2024-06-27 17:53:29,188 INFO L175 Difference]: Start difference. First operand has 373 places, 475 transitions, 6450 flow. Second operand 11 states and 291 transitions. [2024-06-27 17:53:29,188 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 383 places, 515 transitions, 7694 flow [2024-06-27 17:53:30,890 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 515 transitions, 7363 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-27 17:53:30,895 INFO L231 Difference]: Finished difference. Result has 378 places, 475 transitions, 6387 flow [2024-06-27 17:53:30,896 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=6119, PETRI_DIFFERENCE_MINUEND_PLACES=367, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=475, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=344, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6387, PETRI_PLACES=378, PETRI_TRANSITIONS=475} [2024-06-27 17:53:30,896 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 329 predicate places. [2024-06-27 17:53:30,896 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 475 transitions, 6387 flow [2024-06-27 17:53:30,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.0) internal successors, (152), 8 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:30,897 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:53:30,897 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:53:30,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-27 17:53:30,897 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:53:30,897 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:53:30,897 INFO L85 PathProgramCache]: Analyzing trace with hash 1647380263, now seen corresponding path program 1 times [2024-06-27 17:53:30,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:53:30,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133035680] [2024-06-27 17:53:30,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:53:30,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:53:30,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:53:30,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:53:30,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:53:30,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133035680] [2024-06-27 17:53:30,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133035680] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:53:30,985 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:53:30,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:53:30,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685362003] [2024-06-27 17:53:30,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:53:30,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:53:30,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:53:30,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:53:30,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:53:31,026 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:53:31,027 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 475 transitions, 6387 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:31,027 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:53:31,027 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:53:31,027 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:53:32,899 INFO L124 PetriNetUnfolderBase]: 5684/9741 cut-off events. [2024-06-27 17:53:32,899 INFO L125 PetriNetUnfolderBase]: For 341417/341420 co-relation queries the response was YES. [2024-06-27 17:53:32,993 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54275 conditions, 9741 events. 5684/9741 cut-off events. For 341417/341420 co-relation queries the response was YES. Maximal size of possible extension queue 647. Compared 74613 event pairs, 1296 based on Foata normal form. 2/9690 useless extension candidates. Maximal degree in co-relation 54116. Up to 7871 conditions per place. [2024-06-27 17:53:33,035 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 409 selfloop transitions, 104 changer transitions 0/526 dead transitions. [2024-06-27 17:53:33,035 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 385 places, 526 transitions, 7832 flow [2024-06-27 17:53:33,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:53:33,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:53:33,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 236 transitions. [2024-06-27 17:53:33,036 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6555555555555556 [2024-06-27 17:53:33,036 INFO L175 Difference]: Start difference. First operand has 378 places, 475 transitions, 6387 flow. Second operand 8 states and 236 transitions. [2024-06-27 17:53:33,036 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 385 places, 526 transitions, 7832 flow [2024-06-27 17:53:34,906 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 375 places, 526 transitions, 7562 flow, removed 0 selfloop flow, removed 10 redundant places. [2024-06-27 17:53:34,911 INFO L231 Difference]: Finished difference. Result has 377 places, 481 transitions, 6493 flow [2024-06-27 17:53:34,912 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=6117, PETRI_DIFFERENCE_MINUEND_PLACES=368, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=475, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=371, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6493, PETRI_PLACES=377, PETRI_TRANSITIONS=481} [2024-06-27 17:53:34,912 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 328 predicate places. [2024-06-27 17:53:34,912 INFO L495 AbstractCegarLoop]: Abstraction has has 377 places, 481 transitions, 6493 flow [2024-06-27 17:53:34,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:34,912 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:53:34,913 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:53:34,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-27 17:53:34,913 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:53:34,913 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:53:34,913 INFO L85 PathProgramCache]: Analyzing trace with hash 1641187657, now seen corresponding path program 2 times [2024-06-27 17:53:34,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:53:34,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839893596] [2024-06-27 17:53:34,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:53:34,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:53:34,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:53:35,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:53:35,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:53:35,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839893596] [2024-06-27 17:53:35,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839893596] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:53:35,005 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:53:35,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:53:35,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498493360] [2024-06-27 17:53:35,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:53:35,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:53:35,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:53:35,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:53:35,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:53:35,055 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:53:35,055 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 377 places, 481 transitions, 6493 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:35,055 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:53:35,055 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:53:35,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:53:36,955 INFO L124 PetriNetUnfolderBase]: 5679/9908 cut-off events. [2024-06-27 17:53:36,955 INFO L125 PetriNetUnfolderBase]: For 345298/345301 co-relation queries the response was YES. [2024-06-27 17:53:37,070 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54598 conditions, 9908 events. 5679/9908 cut-off events. For 345298/345301 co-relation queries the response was YES. Maximal size of possible extension queue 647. Compared 77090 event pairs, 1421 based on Foata normal form. 2/9866 useless extension candidates. Maximal degree in co-relation 54437. Up to 8026 conditions per place. [2024-06-27 17:53:37,113 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 406 selfloop transitions, 99 changer transitions 0/518 dead transitions. [2024-06-27 17:53:37,114 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 384 places, 518 transitions, 7589 flow [2024-06-27 17:53:37,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:53:37,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:53:37,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 228 transitions. [2024-06-27 17:53:37,115 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6333333333333333 [2024-06-27 17:53:37,115 INFO L175 Difference]: Start difference. First operand has 377 places, 481 transitions, 6493 flow. Second operand 8 states and 228 transitions. [2024-06-27 17:53:37,115 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 384 places, 518 transitions, 7589 flow [2024-06-27 17:53:38,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 379 places, 518 transitions, 7362 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-27 17:53:38,940 INFO L231 Difference]: Finished difference. Result has 380 places, 481 transitions, 6469 flow [2024-06-27 17:53:38,941 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=6266, PETRI_DIFFERENCE_MINUEND_PLACES=372, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=481, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=382, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6469, PETRI_PLACES=380, PETRI_TRANSITIONS=481} [2024-06-27 17:53:38,941 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 331 predicate places. [2024-06-27 17:53:38,941 INFO L495 AbstractCegarLoop]: Abstraction has has 380 places, 481 transitions, 6469 flow [2024-06-27 17:53:38,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:38,941 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:53:38,941 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:53:38,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-27 17:53:38,942 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:53:38,942 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:53:38,942 INFO L85 PathProgramCache]: Analyzing trace with hash 97874775, now seen corresponding path program 3 times [2024-06-27 17:53:38,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:53:38,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795289604] [2024-06-27 17:53:38,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:53:38,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:53:38,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:53:39,037 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:53:39,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:53:39,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795289604] [2024-06-27 17:53:39,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795289604] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:53:39,037 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:53:39,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:53:39,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605942368] [2024-06-27 17:53:39,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:53:39,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:53:39,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:53:39,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:53:39,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:53:39,083 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:53:39,083 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 380 places, 481 transitions, 6469 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:39,083 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:53:39,083 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:53:39,083 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:53:41,087 INFO L124 PetriNetUnfolderBase]: 5697/9697 cut-off events. [2024-06-27 17:53:41,088 INFO L125 PetriNetUnfolderBase]: For 350492/350495 co-relation queries the response was YES. [2024-06-27 17:53:41,178 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54525 conditions, 9697 events. 5697/9697 cut-off events. For 350492/350495 co-relation queries the response was YES. Maximal size of possible extension queue 651. Compared 73844 event pairs, 1315 based on Foata normal form. 4/9658 useless extension candidates. Maximal degree in co-relation 54363. Up to 8276 conditions per place. [2024-06-27 17:53:41,211 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 454 selfloop transitions, 50 changer transitions 0/517 dead transitions. [2024-06-27 17:53:41,211 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 387 places, 517 transitions, 7608 flow [2024-06-27 17:53:41,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:53:41,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:53:41,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 221 transitions. [2024-06-27 17:53:41,212 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6138888888888889 [2024-06-27 17:53:41,212 INFO L175 Difference]: Start difference. First operand has 380 places, 481 transitions, 6469 flow. Second operand 8 states and 221 transitions. [2024-06-27 17:53:41,212 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 387 places, 517 transitions, 7608 flow [2024-06-27 17:53:43,071 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 517 transitions, 7379 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-27 17:53:43,076 INFO L231 Difference]: Finished difference. Result has 382 places, 483 transitions, 6402 flow [2024-06-27 17:53:43,077 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=6240, PETRI_DIFFERENCE_MINUEND_PLACES=374, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=481, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=431, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6402, PETRI_PLACES=382, PETRI_TRANSITIONS=483} [2024-06-27 17:53:43,077 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 333 predicate places. [2024-06-27 17:53:43,077 INFO L495 AbstractCegarLoop]: Abstraction has has 382 places, 483 transitions, 6402 flow [2024-06-27 17:53:43,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:43,077 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:53:43,077 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:53:43,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-27 17:53:43,078 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:53:43,078 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:53:43,078 INFO L85 PathProgramCache]: Analyzing trace with hash -26677428, now seen corresponding path program 7 times [2024-06-27 17:53:43,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:53:43,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15590847] [2024-06-27 17:53:43,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:53:43,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:53:43,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:53:43,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:53:43,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:53:43,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15590847] [2024-06-27 17:53:43,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15590847] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:53:43,153 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:53:43,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:53:43,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686495405] [2024-06-27 17:53:43,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:53:43,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:53:43,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:53:43,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:53:43,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:53:43,208 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:53:43,208 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 382 places, 483 transitions, 6402 flow. Second operand has 8 states, 8 states have (on average 19.0) internal successors, (152), 8 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:43,208 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:53:43,208 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:53:43,208 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:53:45,027 INFO L124 PetriNetUnfolderBase]: 5736/9437 cut-off events. [2024-06-27 17:53:45,027 INFO L125 PetriNetUnfolderBase]: For 358066/358084 co-relation queries the response was YES. [2024-06-27 17:53:45,118 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54327 conditions, 9437 events. 5736/9437 cut-off events. For 358066/358084 co-relation queries the response was YES. Maximal size of possible extension queue 650. Compared 69576 event pairs, 1083 based on Foata normal form. 13/9413 useless extension candidates. Maximal degree in co-relation 54164. Up to 7521 conditions per place. [2024-06-27 17:53:45,153 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 322 selfloop transitions, 201 changer transitions 0/536 dead transitions. [2024-06-27 17:53:45,154 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 390 places, 536 transitions, 7942 flow [2024-06-27 17:53:45,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 17:53:45,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 17:53:45,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 257 transitions. [2024-06-27 17:53:45,155 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6345679012345679 [2024-06-27 17:53:45,155 INFO L175 Difference]: Start difference. First operand has 382 places, 483 transitions, 6402 flow. Second operand 9 states and 257 transitions. [2024-06-27 17:53:45,155 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 390 places, 536 transitions, 7942 flow [2024-06-27 17:53:47,120 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 384 places, 536 transitions, 7807 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-27 17:53:47,125 INFO L231 Difference]: Finished difference. Result has 385 places, 492 transitions, 6749 flow [2024-06-27 17:53:47,126 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=6267, PETRI_DIFFERENCE_MINUEND_PLACES=376, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=483, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=192, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=291, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6749, PETRI_PLACES=385, PETRI_TRANSITIONS=492} [2024-06-27 17:53:47,126 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 336 predicate places. [2024-06-27 17:53:47,126 INFO L495 AbstractCegarLoop]: Abstraction has has 385 places, 492 transitions, 6749 flow [2024-06-27 17:53:47,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.0) internal successors, (152), 8 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:47,126 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:53:47,126 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:53:47,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-27 17:53:47,127 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:53:47,127 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:53:47,127 INFO L85 PathProgramCache]: Analyzing trace with hash 1650230620, now seen corresponding path program 8 times [2024-06-27 17:53:47,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:53:47,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433047252] [2024-06-27 17:53:47,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:53:47,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:53:47,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:53:47,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:53:47,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:53:47,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433047252] [2024-06-27 17:53:47,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433047252] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:53:47,206 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:53:47,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:53:47,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024870880] [2024-06-27 17:53:47,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:53:47,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:53:47,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:53:47,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:53:47,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:53:47,250 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:53:47,250 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 385 places, 492 transitions, 6749 flow. Second operand has 8 states, 8 states have (on average 19.0) internal successors, (152), 8 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:47,250 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:53:47,250 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:53:47,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:53:49,271 INFO L124 PetriNetUnfolderBase]: 5747/9466 cut-off events. [2024-06-27 17:53:49,271 INFO L125 PetriNetUnfolderBase]: For 369377/369395 co-relation queries the response was YES. [2024-06-27 17:53:49,372 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55152 conditions, 9466 events. 5747/9466 cut-off events. For 369377/369395 co-relation queries the response was YES. Maximal size of possible extension queue 651. Compared 69995 event pairs, 1069 based on Foata normal form. 13/9436 useless extension candidates. Maximal degree in co-relation 54988. Up to 7533 conditions per place. [2024-06-27 17:53:49,409 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 316 selfloop transitions, 211 changer transitions 0/540 dead transitions. [2024-06-27 17:53:49,409 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 394 places, 540 transitions, 8417 flow [2024-06-27 17:53:49,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 17:53:49,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 17:53:49,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 280 transitions. [2024-06-27 17:53:49,410 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6222222222222222 [2024-06-27 17:53:49,410 INFO L175 Difference]: Start difference. First operand has 385 places, 492 transitions, 6749 flow. Second operand 10 states and 280 transitions. [2024-06-27 17:53:49,410 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 394 places, 540 transitions, 8417 flow [2024-06-27 17:53:51,876 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 540 transitions, 8110 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-27 17:53:51,882 INFO L231 Difference]: Finished difference. Result has 390 places, 495 transitions, 6899 flow [2024-06-27 17:53:51,882 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=6445, PETRI_DIFFERENCE_MINUEND_PLACES=380, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=492, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=208, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6899, PETRI_PLACES=390, PETRI_TRANSITIONS=495} [2024-06-27 17:53:51,882 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 341 predicate places. [2024-06-27 17:53:51,883 INFO L495 AbstractCegarLoop]: Abstraction has has 390 places, 495 transitions, 6899 flow [2024-06-27 17:53:51,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.0) internal successors, (152), 8 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:51,883 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:53:51,883 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:53:51,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-27 17:53:51,883 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:53:51,883 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:53:51,884 INFO L85 PathProgramCache]: Analyzing trace with hash 1474742410, now seen corresponding path program 9 times [2024-06-27 17:53:51,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:53:51,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142154549] [2024-06-27 17:53:51,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:53:51,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:53:51,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:53:51,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:53:51,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:53:51,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142154549] [2024-06-27 17:53:51,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142154549] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:53:51,962 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:53:51,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:53:51,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593708182] [2024-06-27 17:53:51,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:53:51,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:53:51,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:53:51,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:53:51,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:53:52,011 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:53:52,011 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 390 places, 495 transitions, 6899 flow. Second operand has 8 states, 8 states have (on average 19.0) internal successors, (152), 8 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:52,011 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:53:52,011 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:53:52,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:53:53,793 INFO L124 PetriNetUnfolderBase]: 5744/9362 cut-off events. [2024-06-27 17:53:53,794 INFO L125 PetriNetUnfolderBase]: For 374416/374434 co-relation queries the response was YES. [2024-06-27 17:53:53,904 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55231 conditions, 9362 events. 5744/9362 cut-off events. For 374416/374434 co-relation queries the response was YES. Maximal size of possible extension queue 651. Compared 68758 event pairs, 1110 based on Foata normal form. 11/9317 useless extension candidates. Maximal degree in co-relation 55066. Up to 7530 conditions per place. [2024-06-27 17:53:53,941 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 322 selfloop transitions, 192 changer transitions 0/527 dead transitions. [2024-06-27 17:53:53,942 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 396 places, 527 transitions, 8329 flow [2024-06-27 17:53:53,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:53:53,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:53:53,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 202 transitions. [2024-06-27 17:53:53,942 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6412698412698413 [2024-06-27 17:53:53,943 INFO L175 Difference]: Start difference. First operand has 390 places, 495 transitions, 6899 flow. Second operand 7 states and 202 transitions. [2024-06-27 17:53:53,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 396 places, 527 transitions, 8329 flow [2024-06-27 17:53:56,285 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 390 places, 527 transitions, 7952 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-27 17:53:56,290 INFO L231 Difference]: Finished difference. Result has 391 places, 495 transitions, 6913 flow [2024-06-27 17:53:56,290 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=6522, PETRI_DIFFERENCE_MINUEND_PLACES=384, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=495, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=192, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=303, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6913, PETRI_PLACES=391, PETRI_TRANSITIONS=495} [2024-06-27 17:53:56,291 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 342 predicate places. [2024-06-27 17:53:56,291 INFO L495 AbstractCegarLoop]: Abstraction has has 391 places, 495 transitions, 6913 flow [2024-06-27 17:53:56,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.0) internal successors, (152), 8 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:56,291 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:53:56,292 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:53:56,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-27 17:53:56,294 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:53:56,294 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:53:56,294 INFO L85 PathProgramCache]: Analyzing trace with hash 1478467060, now seen corresponding path program 10 times [2024-06-27 17:53:56,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:53:56,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576141896] [2024-06-27 17:53:56,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:53:56,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:53:56,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:53:56,413 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 17:53:56,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:53:56,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576141896] [2024-06-27 17:53:56,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576141896] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:53:56,414 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:53:56,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:53:56,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928093825] [2024-06-27 17:53:56,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:53:56,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:53:56,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:53:56,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:53:56,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:53:56,471 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:53:56,471 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 391 places, 495 transitions, 6913 flow. Second operand has 8 states, 8 states have (on average 19.0) internal successors, (152), 8 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:56,471 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:53:56,472 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:53:56,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand