./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe030_tso.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/protection/safe030_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/safe030_tso.i ./goblint.2024-06-19_11-23-25.files/protection/safe030_tso.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-27 19:32:19,101 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 19:32:19,184 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 19:32:19,188 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 19:32:19,188 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 19:32:19,211 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 19:32:19,215 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 19:32:19,216 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 19:32:19,216 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 19:32:19,220 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 19:32:19,220 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 19:32:19,220 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 19:32:19,221 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 19:32:19,222 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 19:32:19,222 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 19:32:19,222 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 19:32:19,223 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 19:32:19,223 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 19:32:19,223 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 19:32:19,223 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 19:32:19,223 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 19:32:19,224 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 19:32:19,224 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 19:32:19,224 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 19:32:19,224 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 19:32:19,225 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 19:32:19,225 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 19:32:19,225 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 19:32:19,226 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 19:32:19,226 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 19:32:19,227 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 19:32:19,227 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 19:32:19,227 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 19:32:19,227 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 19:32:19,227 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 19:32:19,228 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 19:32:19,228 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 19:32:19,228 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 19:32:19,228 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 19:32:19,228 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 19:32:19,228 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 19:32:19,229 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 19:32:19,229 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 19:32:19,229 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-27 19:32:19,429 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 19:32:19,450 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 19:32:19,452 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 19:32:19,453 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 19:32:19,453 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 19:32:19,454 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe030_tso.i [2024-06-27 19:32:20,534 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 19:32:20,749 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 19:32:20,749 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe030_tso.i [2024-06-27 19:32:20,772 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e470b3222/34a010e2137f44909624978c000f58e4/FLAG179493d5d [2024-06-27 19:32:20,790 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e470b3222/34a010e2137f44909624978c000f58e4 [2024-06-27 19:32:20,792 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 19:32:20,793 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 19:32:20,793 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/safe030_tso.yml/witness.yml [2024-06-27 19:32:20,891 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 19:32:20,896 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 19:32:20,898 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 19:32:20,898 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 19:32:20,902 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 19:32:20,902 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 07:32:20" (1/2) ... [2024-06-27 19:32:20,903 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6fcebc96 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:32:20, skipping insertion in model container [2024-06-27 19:32:20,903 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 07:32:20" (1/2) ... [2024-06-27 19:32:20,907 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@4b692aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:32:20, skipping insertion in model container [2024-06-27 19:32:20,907 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 07:32:20" (2/2) ... [2024-06-27 19:32:20,907 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6fcebc96 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 07:32:20, skipping insertion in model container [2024-06-27 19:32:20,908 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 07:32:20" (2/2) ... [2024-06-27 19:32:20,908 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 19:32:20,943 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 19:32:20,945 INFO L97 edCorrectnessWitness]: Location invariant before [L780-L780] (((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || ((z == 0 || z == 1) || z == 2)) [2024-06-27 19:32:20,945 INFO L97 edCorrectnessWitness]: Location invariant before [L777-L777] (((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || ((z == 0 || z == 1) || z == 2)) [2024-06-27 19:32:20,945 INFO L97 edCorrectnessWitness]: Location invariant before [L779-L779] (((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || ((z == 0 || z == 1) || z == 2)) [2024-06-27 19:32:20,945 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 19:32:20,945 INFO L106 edCorrectnessWitness]: ghost_update [L775-L775] multithreaded = 1; [2024-06-27 19:32:20,983 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 19:32:21,299 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 19:32:21,307 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-27 19:32:21,367 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 19:32:21,394 INFO L206 MainTranslator]: Completed translation [2024-06-27 19:32:21,395 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 07:32:21 WrapperNode [2024-06-27 19:32:21,396 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 19:32:21,396 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 19:32:21,396 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 19:32:21,397 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 19:32:21,402 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 07:32:21" (1/1) ... [2024-06-27 19:32:21,426 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 07:32:21" (1/1) ... [2024-06-27 19:32:21,448 INFO L138 Inliner]: procedures = 175, calls = 42, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 64 [2024-06-27 19:32:21,449 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 19:32:21,449 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 19:32:21,449 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 19:32:21,449 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 19:32:21,457 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 07:32:21" (1/1) ... [2024-06-27 19:32:21,457 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 07:32:21" (1/1) ... [2024-06-27 19:32:21,460 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 07:32:21" (1/1) ... [2024-06-27 19:32:21,470 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-27 19:32:21,470 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 07:32:21" (1/1) ... [2024-06-27 19:32:21,470 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 07:32:21" (1/1) ... [2024-06-27 19:32:21,474 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 07:32:21" (1/1) ... [2024-06-27 19:32:21,475 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 07:32:21" (1/1) ... [2024-06-27 19:32:21,476 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 07:32:21" (1/1) ... [2024-06-27 19:32:21,477 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 07:32:21" (1/1) ... [2024-06-27 19:32:21,478 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 19:32:21,479 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 19:32:21,479 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 19:32:21,479 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 19:32:21,480 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 07:32:21" (1/1) ... [2024-06-27 19:32:21,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 19:32:21,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 19:32:21,500 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-27 19:32:21,538 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-27 19:32:21,550 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 19:32:21,560 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 19:32:21,560 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-27 19:32:21,560 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-27 19:32:21,561 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-27 19:32:21,561 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-27 19:32:21,561 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-27 19:32:21,561 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-27 19:32:21,561 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 19:32:21,562 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 19:32:21,562 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 19:32:21,562 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 19:32:21,563 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-27 19:32:21,681 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 19:32:21,687 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 19:32:21,822 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 19:32:21,823 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 19:32:21,888 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 19:32:21,889 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-27 19:32:21,889 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 07:32:21 BoogieIcfgContainer [2024-06-27 19:32:21,889 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 19:32:21,891 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 19:32:21,891 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 19:32:21,893 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 19:32:21,894 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 07:32:20" (1/4) ... [2024-06-27 19:32:21,894 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@692239e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 07:32:21, skipping insertion in model container [2024-06-27 19:32:21,894 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 07:32:20" (2/4) ... [2024-06-27 19:32:21,894 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@692239e1 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 07:32:21, skipping insertion in model container [2024-06-27 19:32:21,895 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 07:32:21" (3/4) ... [2024-06-27 19:32:21,895 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@692239e1 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 07:32:21, skipping insertion in model container [2024-06-27 19:32:21,895 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 07:32:21" (4/4) ... [2024-06-27 19:32:21,896 INFO L112 eAbstractionObserver]: Analyzing ICFG safe030_tso.i [2024-06-27 19:32:21,909 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 19:32:21,910 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-27 19:32:21,910 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 19:32:21,948 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 19:32:21,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 50 places, 40 transitions, 92 flow [2024-06-27 19:32:22,019 INFO L124 PetriNetUnfolderBase]: 0/37 cut-off events. [2024-06-27 19:32:22,021 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 19:32:22,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47 conditions, 37 events. 0/37 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 60 event pairs, 0 based on Foata normal form. 0/34 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-27 19:32:22,023 INFO L82 GeneralOperation]: Start removeDead. Operand has 50 places, 40 transitions, 92 flow [2024-06-27 19:32:22,027 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 41 places, 31 transitions, 71 flow [2024-06-27 19:32:22,040 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 19:32:22,048 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;@34fada3f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 19:32:22,048 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-27 19:32:22,053 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 19:32:22,054 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-27 19:32:22,054 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 19:32:22,054 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:22,055 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-27 19:32:22,055 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:32:22,059 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:22,059 INFO L85 PathProgramCache]: Analyzing trace with hash 212211336, now seen corresponding path program 1 times [2024-06-27 19:32:22,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:22,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827346931] [2024-06-27 19:32:22,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:22,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:22,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:22,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:22,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:22,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827346931] [2024-06-27 19:32:22,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827346931] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:22,449 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:22,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 19:32:22,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334744311] [2024-06-27 19:32:22,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:22,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 19:32:22,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:22,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 19:32:22,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 19:32:22,525 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:32:22,527 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 31 transitions, 71 flow. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:22,528 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:22,528 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:32:22,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:22,725 INFO L124 PetriNetUnfolderBase]: 946/1516 cut-off events. [2024-06-27 19:32:22,725 INFO L125 PetriNetUnfolderBase]: For 29/29 co-relation queries the response was YES. [2024-06-27 19:32:22,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3022 conditions, 1516 events. 946/1516 cut-off events. For 29/29 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 7431 event pairs, 638 based on Foata normal form. 1/1452 useless extension candidates. Maximal degree in co-relation 3010. Up to 1431 conditions per place. [2024-06-27 19:32:22,742 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 30 selfloop transitions, 4 changer transitions 0/41 dead transitions. [2024-06-27 19:32:22,742 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 41 transitions, 165 flow [2024-06-27 19:32:22,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 19:32:22,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 19:32:22,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 79 transitions. [2024-06-27 19:32:22,752 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6583333333333333 [2024-06-27 19:32:22,753 INFO L175 Difference]: Start difference. First operand has 41 places, 31 transitions, 71 flow. Second operand 3 states and 79 transitions. [2024-06-27 19:32:22,754 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 41 transitions, 165 flow [2024-06-27 19:32:22,756 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 41 transitions, 160 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-27 19:32:22,758 INFO L231 Difference]: Finished difference. Result has 41 places, 34 transitions, 98 flow [2024-06-27 19:32:22,759 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=98, PETRI_PLACES=41, PETRI_TRANSITIONS=34} [2024-06-27 19:32:22,762 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 0 predicate places. [2024-06-27 19:32:22,762 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 34 transitions, 98 flow [2024-06-27 19:32:22,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:22,763 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:22,763 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:22,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 19:32:22,763 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:32:22,764 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:22,764 INFO L85 PathProgramCache]: Analyzing trace with hash 2071824795, now seen corresponding path program 1 times [2024-06-27 19:32:22,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:22,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095081763] [2024-06-27 19:32:22,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:22,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:22,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:22,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:22,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:22,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095081763] [2024-06-27 19:32:22,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095081763] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:22,832 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:22,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 19:32:22,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458701213] [2024-06-27 19:32:22,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:22,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 19:32:22,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:22,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 19:32:22,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-27 19:32:22,862 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:32:22,862 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 34 transitions, 98 flow. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 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 19:32:22,862 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:22,863 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:32:22,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:23,006 INFO L124 PetriNetUnfolderBase]: 940/1507 cut-off events. [2024-06-27 19:32:23,006 INFO L125 PetriNetUnfolderBase]: For 273/273 co-relation queries the response was YES. [2024-06-27 19:32:23,009 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3428 conditions, 1507 events. 940/1507 cut-off events. For 273/273 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 7378 event pairs, 532 based on Foata normal form. 3/1474 useless extension candidates. Maximal degree in co-relation 3416. Up to 1407 conditions per place. [2024-06-27 19:32:23,015 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 37 selfloop transitions, 7 changer transitions 0/51 dead transitions. [2024-06-27 19:32:23,015 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 51 transitions, 232 flow [2024-06-27 19:32:23,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 19:32:23,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 19:32:23,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 103 transitions. [2024-06-27 19:32:23,019 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.64375 [2024-06-27 19:32:23,020 INFO L175 Difference]: Start difference. First operand has 41 places, 34 transitions, 98 flow. Second operand 4 states and 103 transitions. [2024-06-27 19:32:23,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 51 transitions, 232 flow [2024-06-27 19:32:23,021 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 51 transitions, 228 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 19:32:23,023 INFO L231 Difference]: Finished difference. Result has 44 places, 37 transitions, 134 flow [2024-06-27 19:32:23,023 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=134, PETRI_PLACES=44, PETRI_TRANSITIONS=37} [2024-06-27 19:32:23,023 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 3 predicate places. [2024-06-27 19:32:23,024 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 37 transitions, 134 flow [2024-06-27 19:32:23,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 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 19:32:23,025 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:23,025 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:23,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 19:32:23,026 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:32:23,026 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:23,027 INFO L85 PathProgramCache]: Analyzing trace with hash -197940083, now seen corresponding path program 1 times [2024-06-27 19:32:23,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:23,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860419361] [2024-06-27 19:32:23,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:23,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:23,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:23,093 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 19:32:23,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:23,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860419361] [2024-06-27 19:32:23,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860419361] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:23,094 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:23,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 19:32:23,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933582302] [2024-06-27 19:32:23,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:23,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 19:32:23,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:23,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 19:32:23,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 19:32:23,141 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:32:23,143 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 37 transitions, 134 flow. Second operand has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:23,143 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:23,143 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:32:23,143 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:23,273 INFO L124 PetriNetUnfolderBase]: 948/1553 cut-off events. [2024-06-27 19:32:23,273 INFO L125 PetriNetUnfolderBase]: For 829/829 co-relation queries the response was YES. [2024-06-27 19:32:23,276 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3901 conditions, 1553 events. 948/1553 cut-off events. For 829/829 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 7797 event pairs, 366 based on Foata normal form. 5/1542 useless extension candidates. Maximal degree in co-relation 3887. Up to 1353 conditions per place. [2024-06-27 19:32:23,282 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 50 selfloop transitions, 16 changer transitions 0/73 dead transitions. [2024-06-27 19:32:23,282 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 73 transitions, 386 flow [2024-06-27 19:32:23,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:32:23,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:32:23,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 135 transitions. [2024-06-27 19:32:23,284 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.675 [2024-06-27 19:32:23,284 INFO L175 Difference]: Start difference. First operand has 44 places, 37 transitions, 134 flow. Second operand 5 states and 135 transitions. [2024-06-27 19:32:23,284 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 73 transitions, 386 flow [2024-06-27 19:32:23,285 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 73 transitions, 372 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-27 19:32:23,286 INFO L231 Difference]: Finished difference. Result has 49 places, 48 transitions, 233 flow [2024-06-27 19:32:23,287 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=233, PETRI_PLACES=49, PETRI_TRANSITIONS=48} [2024-06-27 19:32:23,287 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 8 predicate places. [2024-06-27 19:32:23,287 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 48 transitions, 233 flow [2024-06-27 19:32:23,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:23,288 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:23,288 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:23,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 19:32:23,288 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:32:23,289 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:23,289 INFO L85 PathProgramCache]: Analyzing trace with hash -2100114816, now seen corresponding path program 1 times [2024-06-27 19:32:23,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:23,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958650460] [2024-06-27 19:32:23,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:23,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:23,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:23,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:23,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:23,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958650460] [2024-06-27 19:32:23,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958650460] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:23,377 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:23,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:32:23,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325307264] [2024-06-27 19:32:23,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:23,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:32:23,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:23,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:32:23,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:32:23,403 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:32:23,403 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 48 transitions, 233 flow. Second operand has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:23,403 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:23,404 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:32:23,404 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:23,561 INFO L124 PetriNetUnfolderBase]: 960/1573 cut-off events. [2024-06-27 19:32:23,561 INFO L125 PetriNetUnfolderBase]: For 1957/1959 co-relation queries the response was YES. [2024-06-27 19:32:23,564 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4715 conditions, 1573 events. 960/1573 cut-off events. For 1957/1959 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 7934 event pairs, 245 based on Foata normal form. 12/1569 useless extension candidates. Maximal degree in co-relation 4698. Up to 1321 conditions per place. [2024-06-27 19:32:23,570 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 54 selfloop transitions, 19 changer transitions 0/80 dead transitions. [2024-06-27 19:32:23,570 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 80 transitions, 489 flow [2024-06-27 19:32:23,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:32:23,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:32:23,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 156 transitions. [2024-06-27 19:32:23,572 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.65 [2024-06-27 19:32:23,572 INFO L175 Difference]: Start difference. First operand has 49 places, 48 transitions, 233 flow. Second operand 6 states and 156 transitions. [2024-06-27 19:32:23,572 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 80 transitions, 489 flow [2024-06-27 19:32:23,574 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 80 transitions, 481 flow, removed 4 selfloop flow, removed 0 redundant places. [2024-06-27 19:32:23,575 INFO L231 Difference]: Finished difference. Result has 54 places, 50 transitions, 289 flow [2024-06-27 19:32:23,576 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=217, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=289, PETRI_PLACES=54, PETRI_TRANSITIONS=50} [2024-06-27 19:32:23,576 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 13 predicate places. [2024-06-27 19:32:23,576 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 50 transitions, 289 flow [2024-06-27 19:32:23,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:23,577 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:23,577 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:23,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 19:32:23,577 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:32:23,577 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:23,578 INFO L85 PathProgramCache]: Analyzing trace with hash 1810790271, now seen corresponding path program 1 times [2024-06-27 19:32:23,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:23,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465223344] [2024-06-27 19:32:23,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:23,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:23,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:23,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:23,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:23,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465223344] [2024-06-27 19:32:23,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465223344] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:23,628 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:23,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 19:32:23,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999350777] [2024-06-27 19:32:23,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:23,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 19:32:23,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:23,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 19:32:23,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-27 19:32:23,651 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:32:23,651 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 50 transitions, 289 flow. Second operand has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:23,651 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:23,651 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:32:23,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:23,752 INFO L124 PetriNetUnfolderBase]: 955/1561 cut-off events. [2024-06-27 19:32:23,752 INFO L125 PetriNetUnfolderBase]: For 2897/2897 co-relation queries the response was YES. [2024-06-27 19:32:23,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5148 conditions, 1561 events. 955/1561 cut-off events. For 2897/2897 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 7810 event pairs, 354 based on Foata normal form. 2/1545 useless extension candidates. Maximal degree in co-relation 5128. Up to 1438 conditions per place. [2024-06-27 19:32:23,774 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 47 selfloop transitions, 7 changer transitions 0/61 dead transitions. [2024-06-27 19:32:23,775 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 61 transitions, 425 flow [2024-06-27 19:32:23,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 19:32:23,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 19:32:23,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 98 transitions. [2024-06-27 19:32:23,776 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6125 [2024-06-27 19:32:23,776 INFO L175 Difference]: Start difference. First operand has 54 places, 50 transitions, 289 flow. Second operand 4 states and 98 transitions. [2024-06-27 19:32:23,776 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 61 transitions, 425 flow [2024-06-27 19:32:23,779 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 61 transitions, 375 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-27 19:32:23,780 INFO L231 Difference]: Finished difference. Result has 54 places, 50 transitions, 261 flow [2024-06-27 19:32:23,780 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=239, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=261, PETRI_PLACES=54, PETRI_TRANSITIONS=50} [2024-06-27 19:32:23,781 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 13 predicate places. [2024-06-27 19:32:23,781 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 50 transitions, 261 flow [2024-06-27 19:32:23,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:23,781 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:23,781 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:23,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 19:32:23,782 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:32:23,782 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:23,782 INFO L85 PathProgramCache]: Analyzing trace with hash 284212581, now seen corresponding path program 1 times [2024-06-27 19:32:23,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:23,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696914204] [2024-06-27 19:32:23,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:23,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:23,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:23,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:23,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:23,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696914204] [2024-06-27 19:32:23,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696914204] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:23,838 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:23,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 19:32:23,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980515374] [2024-06-27 19:32:23,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:23,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 19:32:23,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:23,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 19:32:23,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 19:32:23,858 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:32:23,859 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 50 transitions, 261 flow. Second operand has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:23,859 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:23,859 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:32:23,859 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:23,970 INFO L124 PetriNetUnfolderBase]: 957/1574 cut-off events. [2024-06-27 19:32:23,971 INFO L125 PetriNetUnfolderBase]: For 3325/3325 co-relation queries the response was YES. [2024-06-27 19:32:23,974 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5137 conditions, 1574 events. 957/1574 cut-off events. For 3325/3325 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 7801 event pairs, 335 based on Foata normal form. 3/1576 useless extension candidates. Maximal degree in co-relation 5116. Up to 1413 conditions per place. [2024-06-27 19:32:23,980 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 55 selfloop transitions, 16 changer transitions 0/78 dead transitions. [2024-06-27 19:32:23,980 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 78 transitions, 519 flow [2024-06-27 19:32:23,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:32:23,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:32:23,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 125 transitions. [2024-06-27 19:32:23,981 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-27 19:32:23,981 INFO L175 Difference]: Start difference. First operand has 54 places, 50 transitions, 261 flow. Second operand 5 states and 125 transitions. [2024-06-27 19:32:23,981 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 78 transitions, 519 flow [2024-06-27 19:32:23,985 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 78 transitions, 499 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-27 19:32:23,986 INFO L231 Difference]: Finished difference. Result has 58 places, 61 transitions, 364 flow [2024-06-27 19:32:23,986 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=241, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=364, PETRI_PLACES=58, PETRI_TRANSITIONS=61} [2024-06-27 19:32:23,987 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 17 predicate places. [2024-06-27 19:32:23,987 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 61 transitions, 364 flow [2024-06-27 19:32:23,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:23,988 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:23,988 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:23,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 19:32:23,988 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:32:23,988 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:23,988 INFO L85 PathProgramCache]: Analyzing trace with hash 643588976, now seen corresponding path program 1 times [2024-06-27 19:32:23,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:23,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823667781] [2024-06-27 19:32:23,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:23,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:23,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:24,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:24,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:24,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823667781] [2024-06-27 19:32:24,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823667781] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:24,043 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:24,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 19:32:24,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890969183] [2024-06-27 19:32:24,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:24,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 19:32:24,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:24,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 19:32:24,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 19:32:24,072 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:32:24,072 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 61 transitions, 364 flow. Second operand has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:24,073 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:24,073 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:32:24,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:24,211 INFO L124 PetriNetUnfolderBase]: 963/1593 cut-off events. [2024-06-27 19:32:24,212 INFO L125 PetriNetUnfolderBase]: For 4985/4989 co-relation queries the response was YES. [2024-06-27 19:32:24,214 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5819 conditions, 1593 events. 963/1593 cut-off events. For 4985/4989 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 7979 event pairs, 337 based on Foata normal form. 8/1599 useless extension candidates. Maximal degree in co-relation 5796. Up to 1375 conditions per place. [2024-06-27 19:32:24,221 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 59 selfloop transitions, 18 changer transitions 0/84 dead transitions. [2024-06-27 19:32:24,221 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 84 transitions, 614 flow [2024-06-27 19:32:24,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:32:24,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:32:24,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 128 transitions. [2024-06-27 19:32:24,222 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.64 [2024-06-27 19:32:24,222 INFO L175 Difference]: Start difference. First operand has 58 places, 61 transitions, 364 flow. Second operand 5 states and 128 transitions. [2024-06-27 19:32:24,222 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 84 transitions, 614 flow [2024-06-27 19:32:24,227 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 84 transitions, 600 flow, removed 7 selfloop flow, removed 0 redundant places. [2024-06-27 19:32:24,228 INFO L231 Difference]: Finished difference. Result has 63 places, 64 transitions, 420 flow [2024-06-27 19:32:24,229 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=350, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=420, PETRI_PLACES=63, PETRI_TRANSITIONS=64} [2024-06-27 19:32:24,229 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 22 predicate places. [2024-06-27 19:32:24,229 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 64 transitions, 420 flow [2024-06-27 19:32:24,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:24,230 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:24,230 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:24,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 19:32:24,230 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:32:24,230 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:24,230 INFO L85 PathProgramCache]: Analyzing trace with hash 708048872, now seen corresponding path program 2 times [2024-06-27 19:32:24,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:24,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937405577] [2024-06-27 19:32:24,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:24,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:24,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:24,282 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:24,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:24,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937405577] [2024-06-27 19:32:24,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937405577] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:24,283 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:24,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 19:32:24,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157271195] [2024-06-27 19:32:24,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:24,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 19:32:24,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:24,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 19:32:24,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 19:32:24,305 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:32:24,306 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 64 transitions, 420 flow. Second operand has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:24,306 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:24,306 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:32:24,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:24,426 INFO L124 PetriNetUnfolderBase]: 951/1566 cut-off events. [2024-06-27 19:32:24,426 INFO L125 PetriNetUnfolderBase]: For 5745/5745 co-relation queries the response was YES. [2024-06-27 19:32:24,430 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5890 conditions, 1566 events. 951/1566 cut-off events. For 5745/5745 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 7747 event pairs, 351 based on Foata normal form. 2/1563 useless extension candidates. Maximal degree in co-relation 5864. Up to 1359 conditions per place. [2024-06-27 19:32:24,437 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 53 selfloop transitions, 19 changer transitions 0/79 dead transitions. [2024-06-27 19:32:24,437 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 79 transitions, 602 flow [2024-06-27 19:32:24,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:32:24,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:32:24,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 124 transitions. [2024-06-27 19:32:24,438 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.62 [2024-06-27 19:32:24,439 INFO L175 Difference]: Start difference. First operand has 63 places, 64 transitions, 420 flow. Second operand 5 states and 124 transitions. [2024-06-27 19:32:24,439 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 79 transitions, 602 flow [2024-06-27 19:32:24,444 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 79 transitions, 575 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-27 19:32:24,445 INFO L231 Difference]: Finished difference. Result has 66 places, 64 transitions, 439 flow [2024-06-27 19:32:24,445 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=393, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=439, PETRI_PLACES=66, PETRI_TRANSITIONS=64} [2024-06-27 19:32:24,446 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 25 predicate places. [2024-06-27 19:32:24,446 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 64 transitions, 439 flow [2024-06-27 19:32:24,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:24,446 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:24,446 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:24,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-27 19:32:24,447 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:32:24,447 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:24,447 INFO L85 PathProgramCache]: Analyzing trace with hash 1406859880, now seen corresponding path program 1 times [2024-06-27 19:32:24,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:24,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644038688] [2024-06-27 19:32:24,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:24,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:24,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:24,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:24,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:24,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644038688] [2024-06-27 19:32:24,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644038688] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:24,502 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:24,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:32:24,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845215701] [2024-06-27 19:32:24,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:24,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:32:24,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:24,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:32:24,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:32:24,526 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:32:24,526 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 64 transitions, 439 flow. Second operand has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:24,526 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:24,526 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:32:24,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:24,679 INFO L124 PetriNetUnfolderBase]: 1097/1791 cut-off events. [2024-06-27 19:32:24,679 INFO L125 PetriNetUnfolderBase]: For 7363/7367 co-relation queries the response was YES. [2024-06-27 19:32:24,683 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6822 conditions, 1791 events. 1097/1791 cut-off events. For 7363/7367 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 9097 event pairs, 302 based on Foata normal form. 9/1791 useless extension candidates. Maximal degree in co-relation 6795. Up to 1233 conditions per place. [2024-06-27 19:32:24,691 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 75 selfloop transitions, 35 changer transitions 0/117 dead transitions. [2024-06-27 19:32:24,691 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 117 transitions, 941 flow [2024-06-27 19:32:24,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:32:24,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:32:24,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 165 transitions. [2024-06-27 19:32:24,693 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6875 [2024-06-27 19:32:24,693 INFO L175 Difference]: Start difference. First operand has 66 places, 64 transitions, 439 flow. Second operand 6 states and 165 transitions. [2024-06-27 19:32:24,693 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 117 transitions, 941 flow [2024-06-27 19:32:24,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 117 transitions, 878 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-27 19:32:24,702 INFO L231 Difference]: Finished difference. Result has 70 places, 85 transitions, 625 flow [2024-06-27 19:32:24,702 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=376, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=625, PETRI_PLACES=70, PETRI_TRANSITIONS=85} [2024-06-27 19:32:24,703 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 29 predicate places. [2024-06-27 19:32:24,703 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 85 transitions, 625 flow [2024-06-27 19:32:24,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:24,703 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:24,703 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:24,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-27 19:32:24,704 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:32:24,704 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:24,704 INFO L85 PathProgramCache]: Analyzing trace with hash 464848900, now seen corresponding path program 2 times [2024-06-27 19:32:24,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:24,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92576373] [2024-06-27 19:32:24,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:24,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:24,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:24,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:24,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:24,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92576373] [2024-06-27 19:32:24,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92576373] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:24,759 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:24,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:32:24,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477254872] [2024-06-27 19:32:24,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:24,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:32:24,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:24,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:32:24,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:32:24,786 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:32:24,787 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 85 transitions, 625 flow. Second operand has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:24,787 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:24,787 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:32:24,787 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:24,938 INFO L124 PetriNetUnfolderBase]: 1138/1863 cut-off events. [2024-06-27 19:32:24,938 INFO L125 PetriNetUnfolderBase]: For 10795/10795 co-relation queries the response was YES. [2024-06-27 19:32:24,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8465 conditions, 1863 events. 1138/1863 cut-off events. For 10795/10795 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 9579 event pairs, 326 based on Foata normal form. 4/1862 useless extension candidates. Maximal degree in co-relation 8434. Up to 1262 conditions per place. [2024-06-27 19:32:24,970 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 77 selfloop transitions, 46 changer transitions 0/130 dead transitions. [2024-06-27 19:32:24,970 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 130 transitions, 1214 flow [2024-06-27 19:32:24,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:32:24,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:32:24,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 161 transitions. [2024-06-27 19:32:24,972 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6708333333333333 [2024-06-27 19:32:24,972 INFO L175 Difference]: Start difference. First operand has 70 places, 85 transitions, 625 flow. Second operand 6 states and 161 transitions. [2024-06-27 19:32:24,972 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 130 transitions, 1214 flow [2024-06-27 19:32:24,983 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 130 transitions, 1174 flow, removed 20 selfloop flow, removed 0 redundant places. [2024-06-27 19:32:24,990 INFO L231 Difference]: Finished difference. Result has 79 places, 102 transitions, 910 flow [2024-06-27 19:32:24,991 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=593, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=910, PETRI_PLACES=79, PETRI_TRANSITIONS=102} [2024-06-27 19:32:24,992 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 38 predicate places. [2024-06-27 19:32:24,994 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 102 transitions, 910 flow [2024-06-27 19:32:24,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:24,995 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:24,995 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:24,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-27 19:32:24,995 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:32:24,996 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:24,996 INFO L85 PathProgramCache]: Analyzing trace with hash -1749580412, now seen corresponding path program 3 times [2024-06-27 19:32:24,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:24,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464883253] [2024-06-27 19:32:24,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:24,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:25,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:25,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:25,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:25,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464883253] [2024-06-27 19:32:25,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464883253] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:25,062 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:25,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:32:25,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793460185] [2024-06-27 19:32:25,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:25,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:32:25,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:25,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:32:25,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:32:25,093 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:32:25,094 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 102 transitions, 910 flow. Second operand has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:25,094 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:25,094 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:32:25,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:25,268 INFO L124 PetriNetUnfolderBase]: 1171/1918 cut-off events. [2024-06-27 19:32:25,269 INFO L125 PetriNetUnfolderBase]: For 14390/14390 co-relation queries the response was YES. [2024-06-27 19:32:25,274 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9748 conditions, 1918 events. 1171/1918 cut-off events. For 14390/14390 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 9944 event pairs, 328 based on Foata normal form. 4/1917 useless extension candidates. Maximal degree in co-relation 9711. Up to 1290 conditions per place. [2024-06-27 19:32:25,283 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 73 selfloop transitions, 58 changer transitions 0/138 dead transitions. [2024-06-27 19:32:25,283 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 138 transitions, 1460 flow [2024-06-27 19:32:25,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:32:25,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:32:25,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 161 transitions. [2024-06-27 19:32:25,284 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6708333333333333 [2024-06-27 19:32:25,284 INFO L175 Difference]: Start difference. First operand has 79 places, 102 transitions, 910 flow. Second operand 6 states and 161 transitions. [2024-06-27 19:32:25,284 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 138 transitions, 1460 flow [2024-06-27 19:32:25,302 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 138 transitions, 1428 flow, removed 16 selfloop flow, removed 0 redundant places. [2024-06-27 19:32:25,304 INFO L231 Difference]: Finished difference. Result has 87 places, 113 transitions, 1194 flow [2024-06-27 19:32:25,304 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=880, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1194, PETRI_PLACES=87, PETRI_TRANSITIONS=113} [2024-06-27 19:32:25,305 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 46 predicate places. [2024-06-27 19:32:25,305 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 113 transitions, 1194 flow [2024-06-27 19:32:25,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:25,305 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:25,305 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:25,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-27 19:32:25,306 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:32:25,306 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:25,306 INFO L85 PathProgramCache]: Analyzing trace with hash -1749571484, now seen corresponding path program 1 times [2024-06-27 19:32:25,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:25,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394232780] [2024-06-27 19:32:25,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:25,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:25,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:25,366 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:25,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:25,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394232780] [2024-06-27 19:32:25,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394232780] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:25,367 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:25,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:32:25,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182820365] [2024-06-27 19:32:25,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:25,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:32:25,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:25,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:32:25,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:32:25,396 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:32:25,396 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 113 transitions, 1194 flow. Second operand has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:25,396 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:25,396 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:32:25,396 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:25,586 INFO L124 PetriNetUnfolderBase]: 1174/1927 cut-off events. [2024-06-27 19:32:25,586 INFO L125 PetriNetUnfolderBase]: For 16838/16838 co-relation queries the response was YES. [2024-06-27 19:32:25,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10568 conditions, 1927 events. 1174/1927 cut-off events. For 16838/16838 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 9930 event pairs, 293 based on Foata normal form. 6/1932 useless extension candidates. Maximal degree in co-relation 10526. Up to 1689 conditions per place. [2024-06-27 19:32:25,602 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 112 selfloop transitions, 19 changer transitions 0/138 dead transitions. [2024-06-27 19:32:25,602 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 138 transitions, 1586 flow [2024-06-27 19:32:25,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:32:25,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:32:25,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 147 transitions. [2024-06-27 19:32:25,603 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6125 [2024-06-27 19:32:25,603 INFO L175 Difference]: Start difference. First operand has 87 places, 113 transitions, 1194 flow. Second operand 6 states and 147 transitions. [2024-06-27 19:32:25,604 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 138 transitions, 1586 flow [2024-06-27 19:32:25,624 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 138 transitions, 1506 flow, removed 14 selfloop flow, removed 2 redundant places. [2024-06-27 19:32:25,625 INFO L231 Difference]: Finished difference. Result has 91 places, 116 transitions, 1198 flow [2024-06-27 19:32:25,626 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1114, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1198, PETRI_PLACES=91, PETRI_TRANSITIONS=116} [2024-06-27 19:32:25,626 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 50 predicate places. [2024-06-27 19:32:25,626 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 116 transitions, 1198 flow [2024-06-27 19:32:25,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:25,627 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:25,627 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:25,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-27 19:32:25,627 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:32:25,627 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:25,627 INFO L85 PathProgramCache]: Analyzing trace with hash 1529644569, now seen corresponding path program 1 times [2024-06-27 19:32:25,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:25,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433765238] [2024-06-27 19:32:25,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:25,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:25,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:25,704 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:25,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:25,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433765238] [2024-06-27 19:32:25,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433765238] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:25,705 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:25,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 19:32:25,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892961800] [2024-06-27 19:32:25,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:25,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 19:32:25,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:25,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 19:32:25,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-27 19:32:25,724 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:32:25,724 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 116 transitions, 1198 flow. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:25,725 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:25,725 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:32:25,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:25,892 INFO L124 PetriNetUnfolderBase]: 1171/1920 cut-off events. [2024-06-27 19:32:25,893 INFO L125 PetriNetUnfolderBase]: For 17368/17368 co-relation queries the response was YES. [2024-06-27 19:32:25,898 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10467 conditions, 1920 events. 1171/1920 cut-off events. For 17368/17368 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 9846 event pairs, 312 based on Foata normal form. 1/1920 useless extension candidates. Maximal degree in co-relation 10424. Up to 1745 conditions per place. [2024-06-27 19:32:25,905 INFO L140 encePairwiseOnDemand]: 34/40 looper letters, 110 selfloop transitions, 7 changer transitions 0/124 dead transitions. [2024-06-27 19:32:25,905 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 124 transitions, 1452 flow [2024-06-27 19:32:25,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 19:32:25,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 19:32:25,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 94 transitions. [2024-06-27 19:32:25,906 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5875 [2024-06-27 19:32:25,906 INFO L175 Difference]: Start difference. First operand has 91 places, 116 transitions, 1198 flow. Second operand 4 states and 94 transitions. [2024-06-27 19:32:25,906 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 124 transitions, 1452 flow [2024-06-27 19:32:25,927 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 124 transitions, 1386 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-27 19:32:25,929 INFO L231 Difference]: Finished difference. Result has 91 places, 116 transitions, 1152 flow [2024-06-27 19:32:25,929 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1132, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1152, PETRI_PLACES=91, PETRI_TRANSITIONS=116} [2024-06-27 19:32:25,929 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 50 predicate places. [2024-06-27 19:32:25,930 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 116 transitions, 1152 flow [2024-06-27 19:32:25,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:25,930 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:25,930 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:25,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-27 19:32:25,930 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:32:25,931 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:25,931 INFO L85 PathProgramCache]: Analyzing trace with hash 13753642, now seen corresponding path program 1 times [2024-06-27 19:32:25,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:25,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555092307] [2024-06-27 19:32:25,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:25,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:25,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:26,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:26,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:26,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555092307] [2024-06-27 19:32:26,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555092307] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:26,001 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:26,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:32:26,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521267846] [2024-06-27 19:32:26,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:26,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:32:26,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:26,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:32:26,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:32:26,041 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:32:26,042 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 116 transitions, 1152 flow. Second operand has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:26,042 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:26,042 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:32:26,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:26,216 INFO L124 PetriNetUnfolderBase]: 1196/1955 cut-off events. [2024-06-27 19:32:26,216 INFO L125 PetriNetUnfolderBase]: For 19271/19275 co-relation queries the response was YES. [2024-06-27 19:32:26,222 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10651 conditions, 1955 events. 1196/1955 cut-off events. For 19271/19275 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 10080 event pairs, 303 based on Foata normal form. 5/1950 useless extension candidates. Maximal degree in co-relation 10607. Up to 1320 conditions per place. [2024-06-27 19:32:26,230 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 87 selfloop transitions, 63 changer transitions 0/157 dead transitions. [2024-06-27 19:32:26,230 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 157 transitions, 1772 flow [2024-06-27 19:32:26,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:32:26,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:32:26,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 167 transitions. [2024-06-27 19:32:26,231 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6958333333333333 [2024-06-27 19:32:26,231 INFO L175 Difference]: Start difference. First operand has 91 places, 116 transitions, 1152 flow. Second operand 6 states and 167 transitions. [2024-06-27 19:32:26,231 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 157 transitions, 1772 flow [2024-06-27 19:32:26,259 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 157 transitions, 1750 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-27 19:32:26,261 INFO L231 Difference]: Finished difference. Result has 96 places, 126 transitions, 1447 flow [2024-06-27 19:32:26,261 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1130, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1447, PETRI_PLACES=96, PETRI_TRANSITIONS=126} [2024-06-27 19:32:26,262 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 55 predicate places. [2024-06-27 19:32:26,262 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 126 transitions, 1447 flow [2024-06-27 19:32:26,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:26,263 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:26,263 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:26,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-27 19:32:26,263 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:32:26,264 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:26,264 INFO L85 PathProgramCache]: Analyzing trace with hash -1248726238, now seen corresponding path program 2 times [2024-06-27 19:32:26,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:26,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677489630] [2024-06-27 19:32:26,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:26,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:26,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:26,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:26,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:26,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677489630] [2024-06-27 19:32:26,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677489630] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:26,355 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:26,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:32:26,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489833286] [2024-06-27 19:32:26,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:26,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:32:26,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:26,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:32:26,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:32:26,377 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:32:26,377 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 126 transitions, 1447 flow. Second operand has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:26,377 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:26,378 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:32:26,378 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:26,574 INFO L124 PetriNetUnfolderBase]: 1221/2002 cut-off events. [2024-06-27 19:32:26,574 INFO L125 PetriNetUnfolderBase]: For 23631/23635 co-relation queries the response was YES. [2024-06-27 19:32:26,580 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11971 conditions, 2002 events. 1221/2002 cut-off events. For 23631/23635 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 10409 event pairs, 303 based on Foata normal form. 5/1997 useless extension candidates. Maximal degree in co-relation 11925. Up to 1345 conditions per place. [2024-06-27 19:32:26,588 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 86 selfloop transitions, 65 changer transitions 0/158 dead transitions. [2024-06-27 19:32:26,588 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 158 transitions, 1997 flow [2024-06-27 19:32:26,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:32:26,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:32:26,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 162 transitions. [2024-06-27 19:32:26,589 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.675 [2024-06-27 19:32:26,590 INFO L175 Difference]: Start difference. First operand has 96 places, 126 transitions, 1447 flow. Second operand 6 states and 162 transitions. [2024-06-27 19:32:26,590 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 158 transitions, 1997 flow [2024-06-27 19:32:26,620 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 158 transitions, 1900 flow, removed 16 selfloop flow, removed 2 redundant places. [2024-06-27 19:32:26,623 INFO L231 Difference]: Finished difference. Result has 100 places, 131 transitions, 1561 flow [2024-06-27 19:32:26,623 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1356, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1561, PETRI_PLACES=100, PETRI_TRANSITIONS=131} [2024-06-27 19:32:26,624 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 59 predicate places. [2024-06-27 19:32:26,624 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 131 transitions, 1561 flow [2024-06-27 19:32:26,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:26,624 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:26,624 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:26,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-27 19:32:26,625 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:32:26,625 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:26,625 INFO L85 PathProgramCache]: Analyzing trace with hash 1532766854, now seen corresponding path program 3 times [2024-06-27 19:32:26,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:26,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413509148] [2024-06-27 19:32:26,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:26,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:26,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:26,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:26,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:26,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413509148] [2024-06-27 19:32:26,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413509148] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:26,682 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:26,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:32:26,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628101294] [2024-06-27 19:32:26,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:26,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:32:26,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:26,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:32:26,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:32:26,703 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:32:26,704 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 131 transitions, 1561 flow. Second operand has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:26,704 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:26,704 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:32:26,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:26,907 INFO L124 PetriNetUnfolderBase]: 1238/2052 cut-off events. [2024-06-27 19:32:26,907 INFO L125 PetriNetUnfolderBase]: For 27571/27575 co-relation queries the response was YES. [2024-06-27 19:32:26,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12420 conditions, 2052 events. 1238/2052 cut-off events. For 27571/27575 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 10947 event pairs, 356 based on Foata normal form. 8/2056 useless extension candidates. Maximal degree in co-relation 12373. Up to 1365 conditions per place. [2024-06-27 19:32:26,922 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 90 selfloop transitions, 64 changer transitions 0/161 dead transitions. [2024-06-27 19:32:26,923 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 161 transitions, 2101 flow [2024-06-27 19:32:26,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:32:26,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:32:26,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 156 transitions. [2024-06-27 19:32:26,924 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.65 [2024-06-27 19:32:26,924 INFO L175 Difference]: Start difference. First operand has 100 places, 131 transitions, 1561 flow. Second operand 6 states and 156 transitions. [2024-06-27 19:32:26,924 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 161 transitions, 2101 flow [2024-06-27 19:32:26,956 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 161 transitions, 1982 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-27 19:32:26,959 INFO L231 Difference]: Finished difference. Result has 104 places, 140 transitions, 1742 flow [2024-06-27 19:32:26,960 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1452, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1742, PETRI_PLACES=104, PETRI_TRANSITIONS=140} [2024-06-27 19:32:26,960 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 63 predicate places. [2024-06-27 19:32:26,960 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 140 transitions, 1742 flow [2024-06-27 19:32:26,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:26,961 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:26,961 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:26,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-27 19:32:26,961 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:32:26,961 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:26,962 INFO L85 PathProgramCache]: Analyzing trace with hash 174343067, now seen corresponding path program 1 times [2024-06-27 19:32:26,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:26,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860159823] [2024-06-27 19:32:26,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:26,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:26,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:27,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:27,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:27,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860159823] [2024-06-27 19:32:27,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860159823] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:27,015 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:27,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 19:32:27,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419393593] [2024-06-27 19:32:27,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:27,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 19:32:27,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:27,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 19:32:27,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 19:32:27,030 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:32:27,030 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 140 transitions, 1742 flow. Second operand has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:27,030 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:27,030 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:32:27,030 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:27,239 INFO L124 PetriNetUnfolderBase]: 1234/2046 cut-off events. [2024-06-27 19:32:27,239 INFO L125 PetriNetUnfolderBase]: For 29130/29141 co-relation queries the response was YES. [2024-06-27 19:32:27,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12825 conditions, 2046 events. 1234/2046 cut-off events. For 29130/29141 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 10792 event pairs, 311 based on Foata normal form. 10/2054 useless extension candidates. Maximal degree in co-relation 12776. Up to 1804 conditions per place. [2024-06-27 19:32:27,256 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 129 selfloop transitions, 16 changer transitions 0/152 dead transitions. [2024-06-27 19:32:27,256 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 152 transitions, 2119 flow [2024-06-27 19:32:27,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:32:27,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:32:27,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 117 transitions. [2024-06-27 19:32:27,258 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.585 [2024-06-27 19:32:27,258 INFO L175 Difference]: Start difference. First operand has 104 places, 140 transitions, 1742 flow. Second operand 5 states and 117 transitions. [2024-06-27 19:32:27,258 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 152 transitions, 2119 flow [2024-06-27 19:32:27,294 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 152 transitions, 2041 flow, removed 14 selfloop flow, removed 2 redundant places. [2024-06-27 19:32:27,296 INFO L231 Difference]: Finished difference. Result has 107 places, 142 transitions, 1739 flow [2024-06-27 19:32:27,297 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1665, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1739, PETRI_PLACES=107, PETRI_TRANSITIONS=142} [2024-06-27 19:32:27,297 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 66 predicate places. [2024-06-27 19:32:27,297 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 142 transitions, 1739 flow [2024-06-27 19:32:27,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:27,297 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:27,297 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:27,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-27 19:32:27,298 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:32:27,298 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:27,298 INFO L85 PathProgramCache]: Analyzing trace with hash 1538360905, now seen corresponding path program 1 times [2024-06-27 19:32:27,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:27,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998908913] [2024-06-27 19:32:27,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:27,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:27,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:27,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:27,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:27,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998908913] [2024-06-27 19:32:27,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998908913] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:27,362 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:27,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:32:27,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724339481] [2024-06-27 19:32:27,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:27,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:32:27,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:27,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:32:27,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:32:27,400 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:32:27,401 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 142 transitions, 1739 flow. Second operand has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:27,401 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:27,401 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:32:27,401 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:27,614 INFO L124 PetriNetUnfolderBase]: 1251/2071 cut-off events. [2024-06-27 19:32:27,614 INFO L125 PetriNetUnfolderBase]: For 31522/31526 co-relation queries the response was YES. [2024-06-27 19:32:27,622 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12772 conditions, 2071 events. 1251/2071 cut-off events. For 31522/31526 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 10932 event pairs, 197 based on Foata normal form. 8/2078 useless extension candidates. Maximal degree in co-relation 12721. Up to 1691 conditions per place. [2024-06-27 19:32:27,631 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 143 selfloop transitions, 22 changer transitions 0/172 dead transitions. [2024-06-27 19:32:27,631 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 172 transitions, 2277 flow [2024-06-27 19:32:27,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:32:27,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:32:27,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-27 19:32:27,633 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6208333333333333 [2024-06-27 19:32:27,633 INFO L175 Difference]: Start difference. First operand has 107 places, 142 transitions, 1739 flow. Second operand 6 states and 149 transitions. [2024-06-27 19:32:27,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 172 transitions, 2277 flow [2024-06-27 19:32:27,672 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 172 transitions, 2181 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-06-27 19:32:27,675 INFO L231 Difference]: Finished difference. Result has 110 places, 146 transitions, 1778 flow [2024-06-27 19:32:27,675 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1643, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1778, PETRI_PLACES=110, PETRI_TRANSITIONS=146} [2024-06-27 19:32:27,675 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 69 predicate places. [2024-06-27 19:32:27,675 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 146 transitions, 1778 flow [2024-06-27 19:32:27,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:27,676 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:27,676 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:27,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-27 19:32:27,676 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:32:27,676 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:27,676 INFO L85 PathProgramCache]: Analyzing trace with hash 421890701, now seen corresponding path program 2 times [2024-06-27 19:32:27,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:27,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732957310] [2024-06-27 19:32:27,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:27,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:27,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:27,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:27,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:27,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732957310] [2024-06-27 19:32:27,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732957310] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:27,734 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:27,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:32:27,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850634586] [2024-06-27 19:32:27,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:27,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:32:27,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:27,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:32:27,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:32:27,760 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:32:27,761 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 146 transitions, 1778 flow. Second operand has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:27,761 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:27,761 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:32:27,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:27,976 INFO L124 PetriNetUnfolderBase]: 1243/2059 cut-off events. [2024-06-27 19:32:27,976 INFO L125 PetriNetUnfolderBase]: For 33449/33453 co-relation queries the response was YES. [2024-06-27 19:32:27,984 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12637 conditions, 2059 events. 1243/2059 cut-off events. For 33449/33453 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 10870 event pairs, 281 based on Foata normal form. 8/2066 useless extension candidates. Maximal degree in co-relation 12586. Up to 1756 conditions per place. [2024-06-27 19:32:27,993 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 142 selfloop transitions, 20 changer transitions 0/169 dead transitions. [2024-06-27 19:32:27,993 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 169 transitions, 2160 flow [2024-06-27 19:32:27,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:32:27,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:32:27,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 147 transitions. [2024-06-27 19:32:27,994 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6125 [2024-06-27 19:32:27,994 INFO L175 Difference]: Start difference. First operand has 110 places, 146 transitions, 1778 flow. Second operand 6 states and 147 transitions. [2024-06-27 19:32:27,994 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 169 transitions, 2160 flow [2024-06-27 19:32:28,045 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 169 transitions, 2039 flow, removed 34 selfloop flow, removed 3 redundant places. [2024-06-27 19:32:28,047 INFO L231 Difference]: Finished difference. Result has 113 places, 146 transitions, 1704 flow [2024-06-27 19:32:28,048 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1657, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1704, PETRI_PLACES=113, PETRI_TRANSITIONS=146} [2024-06-27 19:32:28,048 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 72 predicate places. [2024-06-27 19:32:28,048 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 146 transitions, 1704 flow [2024-06-27 19:32:28,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:28,048 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:28,048 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:28,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-27 19:32:28,049 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:32:28,049 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:28,049 INFO L85 PathProgramCache]: Analyzing trace with hash 426544049, now seen corresponding path program 1 times [2024-06-27 19:32:28,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:28,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988973553] [2024-06-27 19:32:28,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:28,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:28,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:28,115 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 19:32:28,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:28,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988973553] [2024-06-27 19:32:28,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988973553] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:28,116 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:28,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:32:28,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116164335] [2024-06-27 19:32:28,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:28,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:32:28,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:28,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:32:28,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:32:28,153 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:32:28,154 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 146 transitions, 1704 flow. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:28,154 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:28,154 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:32:28,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:28,447 INFO L124 PetriNetUnfolderBase]: 1506/2494 cut-off events. [2024-06-27 19:32:28,447 INFO L125 PetriNetUnfolderBase]: For 48964/48968 co-relation queries the response was YES. [2024-06-27 19:32:28,456 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14093 conditions, 2494 events. 1506/2494 cut-off events. For 48964/48968 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 13673 event pairs, 344 based on Foata normal form. 65/2549 useless extension candidates. Maximal degree in co-relation 14041. Up to 1430 conditions per place. [2024-06-27 19:32:28,465 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 103 selfloop transitions, 74 changer transitions 0/184 dead transitions. [2024-06-27 19:32:28,465 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 184 transitions, 2312 flow [2024-06-27 19:32:28,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:32:28,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:32:28,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 191 transitions. [2024-06-27 19:32:28,467 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6821428571428572 [2024-06-27 19:32:28,467 INFO L175 Difference]: Start difference. First operand has 113 places, 146 transitions, 1704 flow. Second operand 7 states and 191 transitions. [2024-06-27 19:32:28,467 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 184 transitions, 2312 flow [2024-06-27 19:32:28,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 184 transitions, 2264 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-27 19:32:28,513 INFO L231 Difference]: Finished difference. Result has 115 places, 149 transitions, 1866 flow [2024-06-27 19:32:28,513 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1656, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1866, PETRI_PLACES=115, PETRI_TRANSITIONS=149} [2024-06-27 19:32:28,514 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 74 predicate places. [2024-06-27 19:32:28,514 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 149 transitions, 1866 flow [2024-06-27 19:32:28,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:28,514 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:28,514 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:28,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-27 19:32:28,515 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:32:28,515 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:28,515 INFO L85 PathProgramCache]: Analyzing trace with hash -861175998, now seen corresponding path program 1 times [2024-06-27 19:32:28,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:28,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059766945] [2024-06-27 19:32:28,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:28,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:28,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:28,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:28,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:28,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059766945] [2024-06-27 19:32:28,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059766945] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:28,563 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:28,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 19:32:28,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980391530] [2024-06-27 19:32:28,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:28,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 19:32:28,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:28,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 19:32:28,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 19:32:28,596 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:32:28,597 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 149 transitions, 1866 flow. Second operand has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:28,597 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:28,597 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:32:28,597 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:28,821 INFO L124 PetriNetUnfolderBase]: 1511/2510 cut-off events. [2024-06-27 19:32:28,821 INFO L125 PetriNetUnfolderBase]: For 41689/41689 co-relation queries the response was YES. [2024-06-27 19:32:28,833 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14965 conditions, 2510 events. 1511/2510 cut-off events. For 41689/41689 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 13758 event pairs, 348 based on Foata normal form. 1/2509 useless extension candidates. Maximal degree in co-relation 14912. Up to 2268 conditions per place. [2024-06-27 19:32:28,843 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 142 selfloop transitions, 19 changer transitions 0/168 dead transitions. [2024-06-27 19:32:28,843 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 168 transitions, 2313 flow [2024-06-27 19:32:28,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:32:28,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:32:28,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 124 transitions. [2024-06-27 19:32:28,844 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.62 [2024-06-27 19:32:28,844 INFO L175 Difference]: Start difference. First operand has 115 places, 149 transitions, 1866 flow. Second operand 5 states and 124 transitions. [2024-06-27 19:32:28,844 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 168 transitions, 2313 flow [2024-06-27 19:32:28,896 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 168 transitions, 2133 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-27 19:32:28,898 INFO L231 Difference]: Finished difference. Result has 115 places, 152 transitions, 1775 flow [2024-06-27 19:32:28,898 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1690, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1775, PETRI_PLACES=115, PETRI_TRANSITIONS=152} [2024-06-27 19:32:28,898 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 74 predicate places. [2024-06-27 19:32:28,899 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 152 transitions, 1775 flow [2024-06-27 19:32:28,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:28,899 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:28,899 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:28,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-27 19:32:28,899 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:32:28,899 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:28,900 INFO L85 PathProgramCache]: Analyzing trace with hash -2006243867, now seen corresponding path program 2 times [2024-06-27 19:32:28,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:28,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251692331] [2024-06-27 19:32:28,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:28,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:28,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:28,962 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 19:32:28,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:28,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251692331] [2024-06-27 19:32:28,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251692331] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:28,962 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:28,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:32:28,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673800684] [2024-06-27 19:32:28,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:28,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:32:28,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:28,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:32:28,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:32:29,006 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:32:29,006 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 152 transitions, 1775 flow. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:29,006 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:29,006 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:32:29,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:29,286 INFO L124 PetriNetUnfolderBase]: 1577/2598 cut-off events. [2024-06-27 19:32:29,286 INFO L125 PetriNetUnfolderBase]: For 45222/45222 co-relation queries the response was YES. [2024-06-27 19:32:29,297 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14686 conditions, 2598 events. 1577/2598 cut-off events. For 45222/45222 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 14274 event pairs, 390 based on Foata normal form. 14/2608 useless extension candidates. Maximal degree in co-relation 14632. Up to 1860 conditions per place. [2024-06-27 19:32:29,308 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 100 selfloop transitions, 78 changer transitions 0/185 dead transitions. [2024-06-27 19:32:29,308 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 185 transitions, 2387 flow [2024-06-27 19:32:29,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:32:29,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:32:29,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 185 transitions. [2024-06-27 19:32:29,309 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6607142857142857 [2024-06-27 19:32:29,309 INFO L175 Difference]: Start difference. First operand has 115 places, 152 transitions, 1775 flow. Second operand 7 states and 185 transitions. [2024-06-27 19:32:29,309 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 185 transitions, 2387 flow [2024-06-27 19:32:29,360 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 185 transitions, 2265 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-27 19:32:29,362 INFO L231 Difference]: Finished difference. Result has 118 places, 155 transitions, 1876 flow [2024-06-27 19:32:29,362 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1653, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1876, PETRI_PLACES=118, PETRI_TRANSITIONS=155} [2024-06-27 19:32:29,362 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 77 predicate places. [2024-06-27 19:32:29,362 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 155 transitions, 1876 flow [2024-06-27 19:32:29,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:29,363 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:29,363 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:29,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-27 19:32:29,363 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:32:29,363 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:29,364 INFO L85 PathProgramCache]: Analyzing trace with hash -2005947197, now seen corresponding path program 3 times [2024-06-27 19:32:29,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:29,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870358913] [2024-06-27 19:32:29,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:29,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:29,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:29,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:29,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:29,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870358913] [2024-06-27 19:32:29,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870358913] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:29,421 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:29,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:32:29,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238312042] [2024-06-27 19:32:29,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:29,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:32:29,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:29,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:32:29,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:32:29,451 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:32:29,452 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 155 transitions, 1876 flow. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:29,452 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:29,452 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:32:29,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:29,780 INFO L124 PetriNetUnfolderBase]: 1875/3104 cut-off events. [2024-06-27 19:32:29,780 INFO L125 PetriNetUnfolderBase]: For 61496/61496 co-relation queries the response was YES. [2024-06-27 19:32:29,791 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18144 conditions, 3104 events. 1875/3104 cut-off events. For 61496/61496 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 17851 event pairs, 439 based on Foata normal form. 14/3114 useless extension candidates. Maximal degree in co-relation 18089. Up to 1402 conditions per place. [2024-06-27 19:32:29,804 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 109 selfloop transitions, 84 changer transitions 0/200 dead transitions. [2024-06-27 19:32:29,804 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 200 transitions, 2706 flow [2024-06-27 19:32:29,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:32:29,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:32:29,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 192 transitions. [2024-06-27 19:32:29,805 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6857142857142857 [2024-06-27 19:32:29,805 INFO L175 Difference]: Start difference. First operand has 118 places, 155 transitions, 1876 flow. Second operand 7 states and 192 transitions. [2024-06-27 19:32:29,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 200 transitions, 2706 flow [2024-06-27 19:32:29,872 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 200 transitions, 2513 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-27 19:32:29,875 INFO L231 Difference]: Finished difference. Result has 121 places, 161 transitions, 2003 flow [2024-06-27 19:32:29,875 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1683, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2003, PETRI_PLACES=121, PETRI_TRANSITIONS=161} [2024-06-27 19:32:29,875 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 80 predicate places. [2024-06-27 19:32:29,875 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 161 transitions, 2003 flow [2024-06-27 19:32:29,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:29,876 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:29,876 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:29,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-27 19:32:29,876 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:32:29,876 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:29,876 INFO L85 PathProgramCache]: Analyzing trace with hash 2052548069, now seen corresponding path program 4 times [2024-06-27 19:32:29,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:29,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80519512] [2024-06-27 19:32:29,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:29,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:29,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:29,933 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:29,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:29,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80519512] [2024-06-27 19:32:29,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80519512] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:29,934 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:29,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:32:29,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131170753] [2024-06-27 19:32:29,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:29,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:32:29,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:29,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:32:29,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:32:29,960 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:32:29,961 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 161 transitions, 2003 flow. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:29,961 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:29,961 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:32:29,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:30,326 INFO L124 PetriNetUnfolderBase]: 1903/3152 cut-off events. [2024-06-27 19:32:30,326 INFO L125 PetriNetUnfolderBase]: For 65606/65606 co-relation queries the response was YES. [2024-06-27 19:32:30,339 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18773 conditions, 3152 events. 1903/3152 cut-off events. For 65606/65606 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 18184 event pairs, 512 based on Foata normal form. 14/3162 useless extension candidates. Maximal degree in co-relation 18716. Up to 2378 conditions per place. [2024-06-27 19:32:30,354 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 111 selfloop transitions, 75 changer transitions 0/193 dead transitions. [2024-06-27 19:32:30,354 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 193 transitions, 2622 flow [2024-06-27 19:32:30,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:32:30,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:32:30,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 184 transitions. [2024-06-27 19:32:30,355 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6571428571428571 [2024-06-27 19:32:30,355 INFO L175 Difference]: Start difference. First operand has 121 places, 161 transitions, 2003 flow. Second operand 7 states and 184 transitions. [2024-06-27 19:32:30,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 193 transitions, 2622 flow [2024-06-27 19:32:30,449 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 193 transitions, 2416 flow, removed 31 selfloop flow, removed 4 redundant places. [2024-06-27 19:32:30,451 INFO L231 Difference]: Finished difference. Result has 124 places, 163 transitions, 1991 flow [2024-06-27 19:32:30,452 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1801, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1991, PETRI_PLACES=124, PETRI_TRANSITIONS=163} [2024-06-27 19:32:30,452 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 83 predicate places. [2024-06-27 19:32:30,452 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 163 transitions, 1991 flow [2024-06-27 19:32:30,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:30,452 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:30,453 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:30,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-27 19:32:30,453 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:32:30,453 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:30,453 INFO L85 PathProgramCache]: Analyzing trace with hash 1109655608, now seen corresponding path program 2 times [2024-06-27 19:32:30,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:30,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098567829] [2024-06-27 19:32:30,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:30,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:30,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:30,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:30,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:30,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098567829] [2024-06-27 19:32:30,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098567829] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:30,502 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:30,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 19:32:30,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802507332] [2024-06-27 19:32:30,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:30,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 19:32:30,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:30,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 19:32:30,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 19:32:30,524 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:32:30,525 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 163 transitions, 1991 flow. Second operand has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:30,525 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:30,525 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:32:30,525 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:30,805 INFO L124 PetriNetUnfolderBase]: 1895/3158 cut-off events. [2024-06-27 19:32:30,806 INFO L125 PetriNetUnfolderBase]: For 63551/63559 co-relation queries the response was YES. [2024-06-27 19:32:30,818 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18495 conditions, 3158 events. 1895/3158 cut-off events. For 63551/63559 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 18315 event pairs, 527 based on Foata normal form. 8/3164 useless extension candidates. Maximal degree in co-relation 18437. Up to 2884 conditions per place. [2024-06-27 19:32:30,829 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 147 selfloop transitions, 18 changer transitions 0/172 dead transitions. [2024-06-27 19:32:30,830 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 172 transitions, 2343 flow [2024-06-27 19:32:30,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:32:30,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:32:30,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 116 transitions. [2024-06-27 19:32:30,831 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.58 [2024-06-27 19:32:30,831 INFO L175 Difference]: Start difference. First operand has 124 places, 163 transitions, 1991 flow. Second operand 5 states and 116 transitions. [2024-06-27 19:32:30,831 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 172 transitions, 2343 flow [2024-06-27 19:32:30,895 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 172 transitions, 2142 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-06-27 19:32:30,898 INFO L231 Difference]: Finished difference. Result has 124 places, 163 transitions, 1834 flow [2024-06-27 19:32:30,898 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1790, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1834, PETRI_PLACES=124, PETRI_TRANSITIONS=163} [2024-06-27 19:32:30,898 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 83 predicate places. [2024-06-27 19:32:30,898 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 163 transitions, 1834 flow [2024-06-27 19:32:30,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:30,899 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:30,899 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:30,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-27 19:32:30,899 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:32:30,899 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:30,899 INFO L85 PathProgramCache]: Analyzing trace with hash -312691412, now seen corresponding path program 1 times [2024-06-27 19:32:30,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:30,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323723052] [2024-06-27 19:32:30,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:30,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:30,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:30,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:30,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:30,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323723052] [2024-06-27 19:32:30,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323723052] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:30,945 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:30,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 19:32:30,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559143102] [2024-06-27 19:32:30,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:30,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 19:32:30,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:30,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 19:32:30,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 19:32:30,962 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:32:30,962 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 163 transitions, 1834 flow. Second operand has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:30,962 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:30,963 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:32:30,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:31,224 INFO L124 PetriNetUnfolderBase]: 1897/3158 cut-off events. [2024-06-27 19:32:31,224 INFO L125 PetriNetUnfolderBase]: For 64038/64038 co-relation queries the response was YES. [2024-06-27 19:32:31,236 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17932 conditions, 3158 events. 1897/3158 cut-off events. For 64038/64038 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 18375 event pairs, 517 based on Foata normal form. 2/3159 useless extension candidates. Maximal degree in co-relation 17873. Up to 2885 conditions per place. [2024-06-27 19:32:31,247 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 154 selfloop transitions, 18 changer transitions 0/179 dead transitions. [2024-06-27 19:32:31,247 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 179 transitions, 2298 flow [2024-06-27 19:32:31,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:32:31,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:32:31,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 120 transitions. [2024-06-27 19:32:31,248 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-27 19:32:31,248 INFO L175 Difference]: Start difference. First operand has 124 places, 163 transitions, 1834 flow. Second operand 5 states and 120 transitions. [2024-06-27 19:32:31,248 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 179 transitions, 2298 flow [2024-06-27 19:32:31,315 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 179 transitions, 2246 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-27 19:32:31,317 INFO L231 Difference]: Finished difference. Result has 124 places, 166 transitions, 1866 flow [2024-06-27 19:32:31,318 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1782, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1866, PETRI_PLACES=124, PETRI_TRANSITIONS=166} [2024-06-27 19:32:31,318 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 83 predicate places. [2024-06-27 19:32:31,318 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 166 transitions, 1866 flow [2024-06-27 19:32:31,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:31,318 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:31,319 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:31,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-27 19:32:31,319 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:32:31,319 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:31,319 INFO L85 PathProgramCache]: Analyzing trace with hash 1110612950, now seen corresponding path program 2 times [2024-06-27 19:32:31,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:31,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272264973] [2024-06-27 19:32:31,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:31,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:31,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:31,363 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:31,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:31,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272264973] [2024-06-27 19:32:31,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272264973] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:31,363 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:31,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 19:32:31,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547129028] [2024-06-27 19:32:31,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:31,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 19:32:31,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:31,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 19:32:31,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 19:32:31,382 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:32:31,382 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 166 transitions, 1866 flow. Second operand has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:31,383 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:31,383 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:32:31,383 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:31,677 INFO L124 PetriNetUnfolderBase]: 1879/3127 cut-off events. [2024-06-27 19:32:31,677 INFO L125 PetriNetUnfolderBase]: For 67637/67639 co-relation queries the response was YES. [2024-06-27 19:32:31,688 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17916 conditions, 3127 events. 1879/3127 cut-off events. For 67637/67639 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 18134 event pairs, 523 based on Foata normal form. 1/3125 useless extension candidates. Maximal degree in co-relation 17856. Up to 2859 conditions per place. [2024-06-27 19:32:31,698 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 149 selfloop transitions, 19 changer transitions 0/175 dead transitions. [2024-06-27 19:32:31,698 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 175 transitions, 2224 flow [2024-06-27 19:32:31,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:32:31,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:32:31,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 117 transitions. [2024-06-27 19:32:31,699 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.585 [2024-06-27 19:32:31,699 INFO L175 Difference]: Start difference. First operand has 124 places, 166 transitions, 1866 flow. Second operand 5 states and 117 transitions. [2024-06-27 19:32:31,699 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 175 transitions, 2224 flow [2024-06-27 19:32:31,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 175 transitions, 2193 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-06-27 19:32:31,777 INFO L231 Difference]: Finished difference. Result has 127 places, 166 transitions, 1879 flow [2024-06-27 19:32:31,777 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1835, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1879, PETRI_PLACES=127, PETRI_TRANSITIONS=166} [2024-06-27 19:32:31,777 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 86 predicate places. [2024-06-27 19:32:31,777 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 166 transitions, 1879 flow [2024-06-27 19:32:31,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:31,778 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:31,778 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:31,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-27 19:32:31,778 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:32:31,778 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:31,779 INFO L85 PathProgramCache]: Analyzing trace with hash 1420826169, now seen corresponding path program 1 times [2024-06-27 19:32:31,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:31,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616017984] [2024-06-27 19:32:31,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:31,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:31,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:31,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:31,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:31,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616017984] [2024-06-27 19:32:31,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616017984] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:31,830 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:31,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:32:31,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619682195] [2024-06-27 19:32:31,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:31,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:32:31,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:31,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:32:31,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:32:31,868 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:32:31,868 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 166 transitions, 1879 flow. Second operand has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:31,868 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:31,869 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:32:31,869 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:32,311 INFO L124 PetriNetUnfolderBase]: 2567/4253 cut-off events. [2024-06-27 19:32:32,311 INFO L125 PetriNetUnfolderBase]: For 127325/127327 co-relation queries the response was YES. [2024-06-27 19:32:32,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25156 conditions, 4253 events. 2567/4253 cut-off events. For 127325/127327 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 26331 event pairs, 460 based on Foata normal form. 48/4271 useless extension candidates. Maximal degree in co-relation 25095. Up to 1585 conditions per place. [2024-06-27 19:32:32,344 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 143 selfloop transitions, 76 changer transitions 0/226 dead transitions. [2024-06-27 19:32:32,345 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 226 transitions, 2921 flow [2024-06-27 19:32:32,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:32:32,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:32:32,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 201 transitions. [2024-06-27 19:32:32,345 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7178571428571429 [2024-06-27 19:32:32,346 INFO L175 Difference]: Start difference. First operand has 127 places, 166 transitions, 1879 flow. Second operand 7 states and 201 transitions. [2024-06-27 19:32:32,346 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 226 transitions, 2921 flow [2024-06-27 19:32:32,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 226 transitions, 2852 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-27 19:32:32,536 INFO L231 Difference]: Finished difference. Result has 130 places, 174 transitions, 2165 flow [2024-06-27 19:32:32,537 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1810, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2165, PETRI_PLACES=130, PETRI_TRANSITIONS=174} [2024-06-27 19:32:32,537 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 89 predicate places. [2024-06-27 19:32:32,537 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 174 transitions, 2165 flow [2024-06-27 19:32:32,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:32,537 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:32,537 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:32,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-27 19:32:32,538 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:32:32,538 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:32,538 INFO L85 PathProgramCache]: Analyzing trace with hash 649922753, now seen corresponding path program 2 times [2024-06-27 19:32:32,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:32,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034819251] [2024-06-27 19:32:32,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:32,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:32,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:32,589 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:32,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:32,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034819251] [2024-06-27 19:32:32,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034819251] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:32,589 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:32,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:32:32,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671435720] [2024-06-27 19:32:32,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:32,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:32:32,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:32,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:32:32,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:32:32,617 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:32:32,618 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 174 transitions, 2165 flow. Second operand has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:32,618 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:32,618 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:32:32,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:33,115 INFO L124 PetriNetUnfolderBase]: 2883/4817 cut-off events. [2024-06-27 19:32:33,116 INFO L125 PetriNetUnfolderBase]: For 153203/153205 co-relation queries the response was YES. [2024-06-27 19:32:33,226 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29697 conditions, 4817 events. 2883/4817 cut-off events. For 153203/153205 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 30897 event pairs, 791 based on Foata normal form. 48/4841 useless extension candidates. Maximal degree in co-relation 29634. Up to 3151 conditions per place. [2024-06-27 19:32:33,294 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 135 selfloop transitions, 80 changer transitions 0/222 dead transitions. [2024-06-27 19:32:33,295 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 222 transitions, 3065 flow [2024-06-27 19:32:33,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:32:33,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:32:33,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 196 transitions. [2024-06-27 19:32:33,298 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7 [2024-06-27 19:32:33,298 INFO L175 Difference]: Start difference. First operand has 130 places, 174 transitions, 2165 flow. Second operand 7 states and 196 transitions. [2024-06-27 19:32:33,298 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 222 transitions, 3065 flow [2024-06-27 19:32:33,475 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 222 transitions, 2914 flow, removed 34 selfloop flow, removed 2 redundant places. [2024-06-27 19:32:33,478 INFO L231 Difference]: Finished difference. Result has 136 places, 180 transitions, 2333 flow [2024-06-27 19:32:33,479 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2014, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2333, PETRI_PLACES=136, PETRI_TRANSITIONS=180} [2024-06-27 19:32:33,480 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 95 predicate places. [2024-06-27 19:32:33,480 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 180 transitions, 2333 flow [2024-06-27 19:32:33,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:33,481 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:33,481 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:33,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-27 19:32:33,481 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:32:33,484 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:33,485 INFO L85 PathProgramCache]: Analyzing trace with hash -559568280, now seen corresponding path program 1 times [2024-06-27 19:32:33,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:33,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572496043] [2024-06-27 19:32:33,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:33,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:33,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:33,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:33,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:33,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572496043] [2024-06-27 19:32:33,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572496043] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:33,550 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:33,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:32:33,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003064894] [2024-06-27 19:32:33,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:33,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:32:33,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:33,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:32:33,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:32:33,577 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:32:33,577 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 180 transitions, 2333 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:33,578 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:33,578 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:32:33,578 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:34,223 INFO L124 PetriNetUnfolderBase]: 2898/4859 cut-off events. [2024-06-27 19:32:34,223 INFO L125 PetriNetUnfolderBase]: For 144787/144789 co-relation queries the response was YES. [2024-06-27 19:32:34,242 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30607 conditions, 4859 events. 2898/4859 cut-off events. For 144787/144789 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 31459 event pairs, 934 based on Foata normal form. 3/4852 useless extension candidates. Maximal degree in co-relation 30541. Up to 4062 conditions per place. [2024-06-27 19:32:34,258 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 119 selfloop transitions, 84 changer transitions 0/210 dead transitions. [2024-06-27 19:32:34,258 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 210 transitions, 3057 flow [2024-06-27 19:32:34,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:32:34,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:32:34,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 162 transitions. [2024-06-27 19:32:34,259 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.675 [2024-06-27 19:32:34,259 INFO L175 Difference]: Start difference. First operand has 136 places, 180 transitions, 2333 flow. Second operand 6 states and 162 transitions. [2024-06-27 19:32:34,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 210 transitions, 3057 flow [2024-06-27 19:32:34,450 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 210 transitions, 2880 flow, removed 36 selfloop flow, removed 3 redundant places. [2024-06-27 19:32:34,452 INFO L231 Difference]: Finished difference. Result has 139 places, 185 transitions, 2419 flow [2024-06-27 19:32:34,452 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2162, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2419, PETRI_PLACES=139, PETRI_TRANSITIONS=185} [2024-06-27 19:32:34,454 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 98 predicate places. [2024-06-27 19:32:34,454 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 185 transitions, 2419 flow [2024-06-27 19:32:34,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:34,454 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:34,454 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:34,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-27 19:32:34,455 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:32:34,455 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:34,455 INFO L85 PathProgramCache]: Analyzing trace with hash 332239371, now seen corresponding path program 3 times [2024-06-27 19:32:34,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:34,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794816227] [2024-06-27 19:32:34,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:34,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:34,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:34,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:34,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:34,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794816227] [2024-06-27 19:32:34,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794816227] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:34,507 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:34,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:32:34,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269396075] [2024-06-27 19:32:34,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:34,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:32:34,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:34,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:32:34,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:32:34,537 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:32:34,537 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 185 transitions, 2419 flow. Second operand has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:34,537 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:34,538 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:32:34,538 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:35,176 INFO L124 PetriNetUnfolderBase]: 3330/5653 cut-off events. [2024-06-27 19:32:35,176 INFO L125 PetriNetUnfolderBase]: For 192859/192861 co-relation queries the response was YES. [2024-06-27 19:32:35,201 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35241 conditions, 5653 events. 3330/5653 cut-off events. For 192859/192861 co-relation queries the response was YES. Maximal size of possible extension queue 346. Compared 38495 event pairs, 932 based on Foata normal form. 42/5685 useless extension candidates. Maximal degree in co-relation 35173. Up to 3813 conditions per place. [2024-06-27 19:32:35,219 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 144 selfloop transitions, 86 changer transitions 0/237 dead transitions. [2024-06-27 19:32:35,219 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 237 transitions, 3445 flow [2024-06-27 19:32:35,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:32:35,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:32:35,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 199 transitions. [2024-06-27 19:32:35,220 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7107142857142857 [2024-06-27 19:32:35,220 INFO L175 Difference]: Start difference. First operand has 139 places, 185 transitions, 2419 flow. Second operand 7 states and 199 transitions. [2024-06-27 19:32:35,221 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 237 transitions, 3445 flow [2024-06-27 19:32:35,550 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 237 transitions, 3304 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-27 19:32:35,553 INFO L231 Difference]: Finished difference. Result has 144 places, 190 transitions, 2601 flow [2024-06-27 19:32:35,554 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2278, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2601, PETRI_PLACES=144, PETRI_TRANSITIONS=190} [2024-06-27 19:32:35,554 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 103 predicate places. [2024-06-27 19:32:35,554 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 190 transitions, 2601 flow [2024-06-27 19:32:35,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:35,554 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:35,554 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:35,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-27 19:32:35,555 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:32:35,555 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:35,555 INFO L85 PathProgramCache]: Analyzing trace with hash 337749621, now seen corresponding path program 4 times [2024-06-27 19:32:35,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:35,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354044110] [2024-06-27 19:32:35,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:35,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:35,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:35,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:35,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:35,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354044110] [2024-06-27 19:32:35,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354044110] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:35,612 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:35,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:32:35,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458393692] [2024-06-27 19:32:35,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:35,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:32:35,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:35,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:32:35,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:32:35,645 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:32:35,646 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 190 transitions, 2601 flow. Second operand has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:35,646 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:35,646 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:32:35,646 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:36,380 INFO L124 PetriNetUnfolderBase]: 3527/6012 cut-off events. [2024-06-27 19:32:36,380 INFO L125 PetriNetUnfolderBase]: For 214220/214222 co-relation queries the response was YES. [2024-06-27 19:32:36,408 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37583 conditions, 6012 events. 3527/6012 cut-off events. For 214220/214222 co-relation queries the response was YES. Maximal size of possible extension queue 374. Compared 41684 event pairs, 1219 based on Foata normal form. 50/6052 useless extension candidates. Maximal degree in co-relation 37513. Up to 4797 conditions per place. [2024-06-27 19:32:36,428 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 138 selfloop transitions, 81 changer transitions 0/226 dead transitions. [2024-06-27 19:32:36,429 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 226 transitions, 3319 flow [2024-06-27 19:32:36,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:32:36,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:32:36,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 187 transitions. [2024-06-27 19:32:36,430 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6678571428571428 [2024-06-27 19:32:36,430 INFO L175 Difference]: Start difference. First operand has 144 places, 190 transitions, 2601 flow. Second operand 7 states and 187 transitions. [2024-06-27 19:32:36,430 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 226 transitions, 3319 flow [2024-06-27 19:32:36,728 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 226 transitions, 3144 flow, removed 31 selfloop flow, removed 3 redundant places. [2024-06-27 19:32:36,731 INFO L231 Difference]: Finished difference. Result has 148 places, 192 transitions, 2665 flow [2024-06-27 19:32:36,731 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2428, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2665, PETRI_PLACES=148, PETRI_TRANSITIONS=192} [2024-06-27 19:32:36,731 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 107 predicate places. [2024-06-27 19:32:36,731 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 192 transitions, 2665 flow [2024-06-27 19:32:36,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:36,732 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:36,732 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:36,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-27 19:32:36,732 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:32:36,732 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:36,733 INFO L85 PathProgramCache]: Analyzing trace with hash 332387241, now seen corresponding path program 5 times [2024-06-27 19:32:36,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:36,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683442964] [2024-06-27 19:32:36,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:36,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:36,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:36,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:36,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:36,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683442964] [2024-06-27 19:32:36,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683442964] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:36,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:36,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:32:36,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802419028] [2024-06-27 19:32:36,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:36,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:32:36,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:36,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:32:36,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:32:36,898 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:32:36,899 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 192 transitions, 2665 flow. Second operand has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:36,899 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:36,899 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:32:36,899 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:37,663 INFO L124 PetriNetUnfolderBase]: 3724/6333 cut-off events. [2024-06-27 19:32:37,664 INFO L125 PetriNetUnfolderBase]: For 228980/228982 co-relation queries the response was YES. [2024-06-27 19:32:37,689 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39332 conditions, 6333 events. 3724/6333 cut-off events. For 228980/228982 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 44173 event pairs, 1307 based on Foata normal form. 50/6373 useless extension candidates. Maximal degree in co-relation 39260. Up to 5136 conditions per place. [2024-06-27 19:32:37,707 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 140 selfloop transitions, 85 changer transitions 0/232 dead transitions. [2024-06-27 19:32:37,708 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 232 transitions, 3475 flow [2024-06-27 19:32:37,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:32:37,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:32:37,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 192 transitions. [2024-06-27 19:32:37,710 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6857142857142857 [2024-06-27 19:32:37,710 INFO L175 Difference]: Start difference. First operand has 148 places, 192 transitions, 2665 flow. Second operand 7 states and 192 transitions. [2024-06-27 19:32:37,710 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 232 transitions, 3475 flow [2024-06-27 19:32:38,071 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 232 transitions, 3272 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-27 19:32:38,074 INFO L231 Difference]: Finished difference. Result has 150 places, 194 transitions, 2711 flow [2024-06-27 19:32:38,074 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2462, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2711, PETRI_PLACES=150, PETRI_TRANSITIONS=194} [2024-06-27 19:32:38,074 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 109 predicate places. [2024-06-27 19:32:38,074 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 194 transitions, 2711 flow [2024-06-27 19:32:38,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:38,075 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:38,075 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:38,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-27 19:32:38,075 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:32:38,075 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:38,075 INFO L85 PathProgramCache]: Analyzing trace with hash 794176355, now seen corresponding path program 1 times [2024-06-27 19:32:38,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:38,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141811408] [2024-06-27 19:32:38,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:38,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:38,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:38,171 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:38,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:38,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141811408] [2024-06-27 19:32:38,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141811408] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:38,172 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:38,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:32:38,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719170482] [2024-06-27 19:32:38,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:38,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:32:38,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:38,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:32:38,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:32:38,209 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:32:38,209 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 194 transitions, 2711 flow. Second operand has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:38,209 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:38,209 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:32:38,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:39,126 INFO L124 PetriNetUnfolderBase]: 3882/6651 cut-off events. [2024-06-27 19:32:39,126 INFO L125 PetriNetUnfolderBase]: For 241767/241769 co-relation queries the response was YES. [2024-06-27 19:32:39,157 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40642 conditions, 6651 events. 3882/6651 cut-off events. For 241767/241769 co-relation queries the response was YES. Maximal size of possible extension queue 422. Compared 47438 event pairs, 1217 based on Foata normal form. 42/6668 useless extension candidates. Maximal degree in co-relation 40569. Up to 4298 conditions per place. [2024-06-27 19:32:39,179 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 140 selfloop transitions, 89 changer transitions 0/236 dead transitions. [2024-06-27 19:32:39,179 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 236 transitions, 3482 flow [2024-06-27 19:32:39,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:32:39,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:32:39,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 191 transitions. [2024-06-27 19:32:39,180 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6821428571428572 [2024-06-27 19:32:39,180 INFO L175 Difference]: Start difference. First operand has 150 places, 194 transitions, 2711 flow. Second operand 7 states and 191 transitions. [2024-06-27 19:32:39,180 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 236 transitions, 3482 flow [2024-06-27 19:32:39,572 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 236 transitions, 3267 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-27 19:32:39,575 INFO L231 Difference]: Finished difference. Result has 152 places, 196 transitions, 2753 flow [2024-06-27 19:32:39,575 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2496, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2753, PETRI_PLACES=152, PETRI_TRANSITIONS=196} [2024-06-27 19:32:39,575 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 111 predicate places. [2024-06-27 19:32:39,575 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 196 transitions, 2753 flow [2024-06-27 19:32:39,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:39,576 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:39,576 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:39,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-27 19:32:39,576 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:32:39,576 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:39,577 INFO L85 PathProgramCache]: Analyzing trace with hash -559269750, now seen corresponding path program 2 times [2024-06-27 19:32:39,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:39,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223561722] [2024-06-27 19:32:39,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:39,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:39,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:39,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:39,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:39,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223561722] [2024-06-27 19:32:39,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223561722] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:39,628 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:39,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:32:39,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903399836] [2024-06-27 19:32:39,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:39,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:32:39,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:39,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:32:39,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:32:39,650 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:32:39,650 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 196 transitions, 2753 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:39,651 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:39,651 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:32:39,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:40,398 INFO L124 PetriNetUnfolderBase]: 3933/6715 cut-off events. [2024-06-27 19:32:40,398 INFO L125 PetriNetUnfolderBase]: For 229784/229786 co-relation queries the response was YES. [2024-06-27 19:32:40,431 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41569 conditions, 6715 events. 3933/6715 cut-off events. For 229784/229786 co-relation queries the response was YES. Maximal size of possible extension queue 421. Compared 47539 event pairs, 1404 based on Foata normal form. 3/6708 useless extension candidates. Maximal degree in co-relation 41495. Up to 5755 conditions per place. [2024-06-27 19:32:40,452 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 130 selfloop transitions, 91 changer transitions 0/228 dead transitions. [2024-06-27 19:32:40,453 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 228 transitions, 3674 flow [2024-06-27 19:32:40,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:32:40,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:32:40,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 155 transitions. [2024-06-27 19:32:40,454 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6458333333333334 [2024-06-27 19:32:40,454 INFO L175 Difference]: Start difference. First operand has 152 places, 196 transitions, 2753 flow. Second operand 6 states and 155 transitions. [2024-06-27 19:32:40,454 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 228 transitions, 3674 flow [2024-06-27 19:32:40,894 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 228 transitions, 3426 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-06-27 19:32:40,897 INFO L231 Difference]: Finished difference. Result has 154 places, 209 transitions, 2964 flow [2024-06-27 19:32:40,898 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2525, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2964, PETRI_PLACES=154, PETRI_TRANSITIONS=209} [2024-06-27 19:32:40,898 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 113 predicate places. [2024-06-27 19:32:40,898 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 209 transitions, 2964 flow [2024-06-27 19:32:40,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:40,899 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:40,899 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:40,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-27 19:32:40,899 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:32:40,899 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:40,899 INFO L85 PathProgramCache]: Analyzing trace with hash -184796667, now seen corresponding path program 6 times [2024-06-27 19:32:40,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:40,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518637532] [2024-06-27 19:32:40,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:40,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:40,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:40,959 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:40,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:40,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518637532] [2024-06-27 19:32:40,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518637532] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:40,960 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:40,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:32:40,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029668337] [2024-06-27 19:32:40,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:40,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:32:40,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:40,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:32:40,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:32:40,989 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:32:40,989 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 209 transitions, 2964 flow. Second operand has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:40,989 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:40,989 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:32:40,989 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:41,891 INFO L124 PetriNetUnfolderBase]: 4034/6916 cut-off events. [2024-06-27 19:32:41,891 INFO L125 PetriNetUnfolderBase]: For 260927/260929 co-relation queries the response was YES. [2024-06-27 19:32:41,923 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41526 conditions, 6916 events. 4034/6916 cut-off events. For 260927/260929 co-relation queries the response was YES. Maximal size of possible extension queue 443. Compared 49474 event pairs, 1480 based on Foata normal form. 52/6964 useless extension candidates. Maximal degree in co-relation 41450. Up to 5622 conditions per place. [2024-06-27 19:32:41,944 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 157 selfloop transitions, 78 changer transitions 0/242 dead transitions. [2024-06-27 19:32:41,945 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 242 transitions, 3730 flow [2024-06-27 19:32:41,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:32:41,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:32:41,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 182 transitions. [2024-06-27 19:32:41,946 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.65 [2024-06-27 19:32:41,946 INFO L175 Difference]: Start difference. First operand has 154 places, 209 transitions, 2964 flow. Second operand 7 states and 182 transitions. [2024-06-27 19:32:41,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 242 transitions, 3730 flow [2024-06-27 19:32:42,197 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 242 transitions, 3613 flow, removed 14 selfloop flow, removed 2 redundant places. [2024-06-27 19:32:42,200 INFO L231 Difference]: Finished difference. Result has 159 places, 211 transitions, 3088 flow [2024-06-27 19:32:42,200 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2847, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3088, PETRI_PLACES=159, PETRI_TRANSITIONS=211} [2024-06-27 19:32:42,200 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 118 predicate places. [2024-06-27 19:32:42,201 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 211 transitions, 3088 flow [2024-06-27 19:32:42,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:42,201 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:42,201 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:42,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-27 19:32:42,201 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:32:42,201 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:42,202 INFO L85 PathProgramCache]: Analyzing trace with hash -184581465, now seen corresponding path program 2 times [2024-06-27 19:32:42,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:42,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48775538] [2024-06-27 19:32:42,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:42,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:42,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:42,248 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:42,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:42,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48775538] [2024-06-27 19:32:42,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48775538] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:42,248 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:42,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:32:42,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424937148] [2024-06-27 19:32:42,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:42,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:32:42,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:42,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:32:42,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:32:42,285 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:32:42,285 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 211 transitions, 3088 flow. Second operand has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:42,285 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:42,285 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:32:42,285 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:43,293 INFO L124 PetriNetUnfolderBase]: 4124/7107 cut-off events. [2024-06-27 19:32:43,293 INFO L125 PetriNetUnfolderBase]: For 265997/265999 co-relation queries the response was YES. [2024-06-27 19:32:43,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42048 conditions, 7107 events. 4124/7107 cut-off events. For 265997/265999 co-relation queries the response was YES. Maximal size of possible extension queue 459. Compared 51425 event pairs, 1450 based on Foata normal form. 44/7147 useless extension candidates. Maximal degree in co-relation 41971. Up to 5437 conditions per place. [2024-06-27 19:32:43,345 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 161 selfloop transitions, 82 changer transitions 0/250 dead transitions. [2024-06-27 19:32:43,345 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 250 transitions, 3897 flow [2024-06-27 19:32:43,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:32:43,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:32:43,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 187 transitions. [2024-06-27 19:32:43,346 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6678571428571428 [2024-06-27 19:32:43,346 INFO L175 Difference]: Start difference. First operand has 159 places, 211 transitions, 3088 flow. Second operand 7 states and 187 transitions. [2024-06-27 19:32:43,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 250 transitions, 3897 flow [2024-06-27 19:32:43,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 250 transitions, 3690 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-06-27 19:32:43,657 INFO L231 Difference]: Finished difference. Result has 161 places, 213 transitions, 3129 flow [2024-06-27 19:32:43,657 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2881, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3129, PETRI_PLACES=161, PETRI_TRANSITIONS=213} [2024-06-27 19:32:43,658 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 120 predicate places. [2024-06-27 19:32:43,658 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 213 transitions, 3129 flow [2024-06-27 19:32:43,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:43,658 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:43,658 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:43,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-27 19:32:43,659 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:32:43,659 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:43,659 INFO L85 PathProgramCache]: Analyzing trace with hash 81115815, now seen corresponding path program 3 times [2024-06-27 19:32:43,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:43,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873824107] [2024-06-27 19:32:43,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:43,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:43,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:43,703 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 19:32:43,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:43,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873824107] [2024-06-27 19:32:43,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873824107] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:43,704 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:43,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:32:43,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963115883] [2024-06-27 19:32:43,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:43,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:32:43,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:43,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:32:43,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:32:43,738 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:32:43,738 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 213 transitions, 3129 flow. Second operand has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:43,738 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:43,738 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:32:43,738 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:44,742 INFO L124 PetriNetUnfolderBase]: 4341/7503 cut-off events. [2024-06-27 19:32:44,742 INFO L125 PetriNetUnfolderBase]: For 288918/288920 co-relation queries the response was YES. [2024-06-27 19:32:44,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43566 conditions, 7503 events. 4341/7503 cut-off events. For 288918/288920 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 54701 event pairs, 1464 based on Foata normal form. 44/7543 useless extension candidates. Maximal degree in co-relation 43488. Up to 3258 conditions per place. [2024-06-27 19:32:44,808 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 161 selfloop transitions, 87 changer transitions 0/255 dead transitions. [2024-06-27 19:32:44,809 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 255 transitions, 3927 flow [2024-06-27 19:32:44,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:32:44,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:32:44,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 189 transitions. [2024-06-27 19:32:44,810 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.675 [2024-06-27 19:32:44,810 INFO L175 Difference]: Start difference. First operand has 161 places, 213 transitions, 3129 flow. Second operand 7 states and 189 transitions. [2024-06-27 19:32:44,810 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 255 transitions, 3927 flow [2024-06-27 19:32:45,380 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 255 transitions, 3706 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-06-27 19:32:45,383 INFO L231 Difference]: Finished difference. Result has 162 places, 213 transitions, 3047 flow [2024-06-27 19:32:45,383 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2848, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3047, PETRI_PLACES=162, PETRI_TRANSITIONS=213} [2024-06-27 19:32:45,383 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 121 predicate places. [2024-06-27 19:32:45,384 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 213 transitions, 3047 flow [2024-06-27 19:32:45,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:45,384 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:45,384 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:45,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-27 19:32:45,384 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:32:45,384 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:45,384 INFO L85 PathProgramCache]: Analyzing trace with hash 39586792, now seen corresponding path program 3 times [2024-06-27 19:32:45,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:45,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583286470] [2024-06-27 19:32:45,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:45,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:45,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:45,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:45,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:45,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583286470] [2024-06-27 19:32:45,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583286470] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:45,424 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:45,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:32:45,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724609813] [2024-06-27 19:32:45,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:45,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:32:45,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:45,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:32:45,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:32:45,449 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:32:45,449 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 213 transitions, 3047 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:45,449 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:45,449 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:32:45,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:46,327 INFO L124 PetriNetUnfolderBase]: 4331/7484 cut-off events. [2024-06-27 19:32:46,328 INFO L125 PetriNetUnfolderBase]: For 267306/267308 co-relation queries the response was YES. [2024-06-27 19:32:46,361 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43405 conditions, 7484 events. 4331/7484 cut-off events. For 267306/267308 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 55000 event pairs, 1710 based on Foata normal form. 6/7476 useless extension candidates. Maximal degree in co-relation 43326. Up to 6460 conditions per place. [2024-06-27 19:32:46,382 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 133 selfloop transitions, 86 changer transitions 0/226 dead transitions. [2024-06-27 19:32:46,382 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 226 transitions, 3743 flow [2024-06-27 19:32:46,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:32:46,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:32:46,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-27 19:32:46,383 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-27 19:32:46,383 INFO L175 Difference]: Start difference. First operand has 162 places, 213 transitions, 3047 flow. Second operand 6 states and 150 transitions. [2024-06-27 19:32:46,383 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 226 transitions, 3743 flow [2024-06-27 19:32:46,812 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 226 transitions, 3506 flow, removed 33 selfloop flow, removed 5 redundant places. [2024-06-27 19:32:46,815 INFO L231 Difference]: Finished difference. Result has 163 places, 213 transitions, 2993 flow [2024-06-27 19:32:46,816 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2810, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2993, PETRI_PLACES=163, PETRI_TRANSITIONS=213} [2024-06-27 19:32:46,816 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 122 predicate places. [2024-06-27 19:32:46,816 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 213 transitions, 2993 flow [2024-06-27 19:32:46,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:46,816 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:46,816 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:46,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-27 19:32:46,817 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:32:46,817 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:46,817 INFO L85 PathProgramCache]: Analyzing trace with hash 1117577004, now seen corresponding path program 1 times [2024-06-27 19:32:46,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:46,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436977680] [2024-06-27 19:32:46,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:46,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:46,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:46,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:46,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:46,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436977680] [2024-06-27 19:32:46,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436977680] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:46,856 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:46,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:32:46,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648745405] [2024-06-27 19:32:46,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:46,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:32:46,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:46,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:32:46,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:32:46,877 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:32:46,877 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 213 transitions, 2993 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:46,877 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:46,877 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:32:46,877 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:47,757 INFO L124 PetriNetUnfolderBase]: 4250/7312 cut-off events. [2024-06-27 19:32:47,757 INFO L125 PetriNetUnfolderBase]: For 260202/260202 co-relation queries the response was YES. [2024-06-27 19:32:47,802 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42372 conditions, 7312 events. 4250/7312 cut-off events. For 260202/260202 co-relation queries the response was YES. Maximal size of possible extension queue 476. Compared 53203 event pairs, 1679 based on Foata normal form. 6/7314 useless extension candidates. Maximal degree in co-relation 42292. Up to 6270 conditions per place. [2024-06-27 19:32:47,824 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 140 selfloop transitions, 95 changer transitions 0/242 dead transitions. [2024-06-27 19:32:47,825 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 242 transitions, 3970 flow [2024-06-27 19:32:47,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:32:47,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:32:47,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-06-27 19:32:47,826 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6375 [2024-06-27 19:32:47,826 INFO L175 Difference]: Start difference. First operand has 163 places, 213 transitions, 2993 flow. Second operand 6 states and 153 transitions. [2024-06-27 19:32:47,826 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 242 transitions, 3970 flow [2024-06-27 19:32:48,180 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 242 transitions, 3482 flow, removed 28 selfloop flow, removed 9 redundant places. [2024-06-27 19:32:48,183 INFO L231 Difference]: Finished difference. Result has 161 places, 226 transitions, 2979 flow [2024-06-27 19:32:48,183 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2555, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2979, PETRI_PLACES=161, PETRI_TRANSITIONS=226} [2024-06-27 19:32:48,184 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 120 predicate places. [2024-06-27 19:32:48,184 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 226 transitions, 2979 flow [2024-06-27 19:32:48,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:48,185 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:48,185 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:48,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-27 19:32:48,185 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:32:48,185 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:48,185 INFO L85 PathProgramCache]: Analyzing trace with hash 39771676, now seen corresponding path program 2 times [2024-06-27 19:32:48,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:48,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792422114] [2024-06-27 19:32:48,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:48,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:48,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:48,225 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:48,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:48,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792422114] [2024-06-27 19:32:48,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792422114] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:48,226 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:48,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:32:48,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120133314] [2024-06-27 19:32:48,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:48,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:32:48,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:48,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:32:48,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:32:48,255 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:32:48,256 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 226 transitions, 2979 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:48,256 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:48,256 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:32:48,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:49,252 INFO L124 PetriNetUnfolderBase]: 4269/7356 cut-off events. [2024-06-27 19:32:49,252 INFO L125 PetriNetUnfolderBase]: For 263726/263728 co-relation queries the response was YES. [2024-06-27 19:32:49,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42520 conditions, 7356 events. 4269/7356 cut-off events. For 263726/263728 co-relation queries the response was YES. Maximal size of possible extension queue 476. Compared 53587 event pairs, 1706 based on Foata normal form. 3/7344 useless extension candidates. Maximal degree in co-relation 42441. Up to 6281 conditions per place. [2024-06-27 19:32:49,323 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 136 selfloop transitions, 101 changer transitions 0/244 dead transitions. [2024-06-27 19:32:49,323 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 244 transitions, 3806 flow [2024-06-27 19:32:49,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:32:49,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:32:49,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-27 19:32:49,324 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6166666666666667 [2024-06-27 19:32:49,324 INFO L175 Difference]: Start difference. First operand has 161 places, 226 transitions, 2979 flow. Second operand 6 states and 148 transitions. [2024-06-27 19:32:49,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 244 transitions, 3806 flow [2024-06-27 19:32:49,792 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 244 transitions, 3677 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-06-27 19:32:49,796 INFO L231 Difference]: Finished difference. Result has 165 places, 231 transitions, 3148 flow [2024-06-27 19:32:49,796 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2853, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3148, PETRI_PLACES=165, PETRI_TRANSITIONS=231} [2024-06-27 19:32:49,796 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 124 predicate places. [2024-06-27 19:32:49,796 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 231 transitions, 3148 flow [2024-06-27 19:32:49,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:49,797 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:49,797 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:49,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-27 19:32:49,797 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:32:49,797 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:49,797 INFO L85 PathProgramCache]: Analyzing trace with hash -204584676, now seen corresponding path program 3 times [2024-06-27 19:32:49,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:49,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051213267] [2024-06-27 19:32:49,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:49,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:49,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:49,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:49,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:49,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051213267] [2024-06-27 19:32:49,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051213267] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:49,838 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:49,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:32:49,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680649515] [2024-06-27 19:32:49,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:49,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:32:49,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:49,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:32:49,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:32:49,865 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:32:49,865 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 231 transitions, 3148 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:49,865 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:49,865 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:32:49,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:50,765 INFO L124 PetriNetUnfolderBase]: 4262/7347 cut-off events. [2024-06-27 19:32:50,766 INFO L125 PetriNetUnfolderBase]: For 274109/274111 co-relation queries the response was YES. [2024-06-27 19:32:50,801 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42660 conditions, 7347 events. 4262/7347 cut-off events. For 274109/274111 co-relation queries the response was YES. Maximal size of possible extension queue 476. Compared 53537 event pairs, 1713 based on Foata normal form. 3/7335 useless extension candidates. Maximal degree in co-relation 42580. Up to 6279 conditions per place. [2024-06-27 19:32:50,820 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 133 selfloop transitions, 104 changer transitions 0/244 dead transitions. [2024-06-27 19:32:50,820 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 244 transitions, 3898 flow [2024-06-27 19:32:50,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:32:50,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:32:50,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-27 19:32:50,821 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6208333333333333 [2024-06-27 19:32:50,821 INFO L175 Difference]: Start difference. First operand has 165 places, 231 transitions, 3148 flow. Second operand 6 states and 149 transitions. [2024-06-27 19:32:50,821 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 244 transitions, 3898 flow [2024-06-27 19:32:51,177 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 244 transitions, 3606 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-27 19:32:51,181 INFO L231 Difference]: Finished difference. Result has 165 places, 231 transitions, 3073 flow [2024-06-27 19:32:51,181 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2856, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3073, PETRI_PLACES=165, PETRI_TRANSITIONS=231} [2024-06-27 19:32:51,181 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 124 predicate places. [2024-06-27 19:32:51,181 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 231 transitions, 3073 flow [2024-06-27 19:32:51,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:51,182 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:51,182 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:51,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-27 19:32:51,182 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:32:51,182 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:51,182 INFO L85 PathProgramCache]: Analyzing trace with hash -1068207446, now seen corresponding path program 1 times [2024-06-27 19:32:51,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:51,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456183545] [2024-06-27 19:32:51,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:51,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:51,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:51,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:51,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:51,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456183545] [2024-06-27 19:32:51,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456183545] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:51,232 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:51,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:32:51,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531341878] [2024-06-27 19:32:51,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:51,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:32:51,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:51,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:32:51,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:32:51,256 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:32:51,256 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 231 transitions, 3073 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:51,256 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:51,257 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:32:51,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:52,164 INFO L124 PetriNetUnfolderBase]: 4265/7359 cut-off events. [2024-06-27 19:32:52,165 INFO L125 PetriNetUnfolderBase]: For 284765/284770 co-relation queries the response was YES. [2024-06-27 19:32:52,203 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42734 conditions, 7359 events. 4265/7359 cut-off events. For 284765/284770 co-relation queries the response was YES. Maximal size of possible extension queue 476. Compared 53596 event pairs, 1665 based on Foata normal form. 8/7365 useless extension candidates. Maximal degree in co-relation 42655. Up to 6822 conditions per place. [2024-06-27 19:32:52,224 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 216 selfloop transitions, 22 changer transitions 0/245 dead transitions. [2024-06-27 19:32:52,225 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 245 transitions, 3623 flow [2024-06-27 19:32:52,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:32:52,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:32:52,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 134 transitions. [2024-06-27 19:32:52,226 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5583333333333333 [2024-06-27 19:32:52,226 INFO L175 Difference]: Start difference. First operand has 165 places, 231 transitions, 3073 flow. Second operand 6 states and 134 transitions. [2024-06-27 19:32:52,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 245 transitions, 3623 flow [2024-06-27 19:32:52,548 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 245 transitions, 3344 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-27 19:32:52,551 INFO L231 Difference]: Finished difference. Result has 165 places, 234 transitions, 2898 flow [2024-06-27 19:32:52,551 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2794, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2898, PETRI_PLACES=165, PETRI_TRANSITIONS=234} [2024-06-27 19:32:52,553 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 124 predicate places. [2024-06-27 19:32:52,553 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 234 transitions, 2898 flow [2024-06-27 19:32:52,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:52,553 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:52,553 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:52,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-27 19:32:52,553 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:32:52,554 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:52,554 INFO L85 PathProgramCache]: Analyzing trace with hash 639928718, now seen corresponding path program 1 times [2024-06-27 19:32:52,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:52,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715344432] [2024-06-27 19:32:52,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:52,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:52,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:52,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:52,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:52,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715344432] [2024-06-27 19:32:52,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715344432] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:52,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:52,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:32:52,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627192428] [2024-06-27 19:32:52,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:52,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:32:52,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:52,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:32:52,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:32:52,632 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:32:52,632 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 234 transitions, 2898 flow. Second operand has 6 states, 6 states have (on average 16.333333333333332) internal successors, (98), 6 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:52,632 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:52,632 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:32:52,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:53,588 INFO L124 PetriNetUnfolderBase]: 4280/7395 cut-off events. [2024-06-27 19:32:53,589 INFO L125 PetriNetUnfolderBase]: For 294191/294198 co-relation queries the response was YES. [2024-06-27 19:32:53,631 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42802 conditions, 7395 events. 4280/7395 cut-off events. For 294191/294198 co-relation queries the response was YES. Maximal size of possible extension queue 478. Compared 54042 event pairs, 1625 based on Foata normal form. 7/7399 useless extension candidates. Maximal degree in co-relation 42724. Up to 6298 conditions per place. [2024-06-27 19:32:53,657 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 160 selfloop transitions, 90 changer transitions 0/257 dead transitions. [2024-06-27 19:32:53,658 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 257 transitions, 3689 flow [2024-06-27 19:32:53,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:32:53,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:32:53,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 151 transitions. [2024-06-27 19:32:53,659 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6291666666666667 [2024-06-27 19:32:53,659 INFO L175 Difference]: Start difference. First operand has 165 places, 234 transitions, 2898 flow. Second operand 6 states and 151 transitions. [2024-06-27 19:32:53,659 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 257 transitions, 3689 flow [2024-06-27 19:32:54,027 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 257 transitions, 3607 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-27 19:32:54,030 INFO L231 Difference]: Finished difference. Result has 167 places, 239 transitions, 3081 flow [2024-06-27 19:32:54,031 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2816, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3081, PETRI_PLACES=167, PETRI_TRANSITIONS=239} [2024-06-27 19:32:54,031 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 126 predicate places. [2024-06-27 19:32:54,031 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 239 transitions, 3081 flow [2024-06-27 19:32:54,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.333333333333332) internal successors, (98), 6 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:54,031 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:54,032 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:54,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-27 19:32:54,032 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:32:54,032 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:54,032 INFO L85 PathProgramCache]: Analyzing trace with hash -139401991, now seen corresponding path program 1 times [2024-06-27 19:32:54,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:54,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875776206] [2024-06-27 19:32:54,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:54,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:54,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:54,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:54,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:54,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875776206] [2024-06-27 19:32:54,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875776206] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:54,104 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:54,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:32:54,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266535250] [2024-06-27 19:32:54,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:54,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:32:54,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:54,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:32:54,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:32:54,132 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:32:54,132 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 239 transitions, 3081 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:54,132 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:54,133 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:32:54,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:55,085 INFO L124 PetriNetUnfolderBase]: 4264/7343 cut-off events. [2024-06-27 19:32:55,085 INFO L125 PetriNetUnfolderBase]: For 304891/304893 co-relation queries the response was YES. [2024-06-27 19:32:55,125 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43083 conditions, 7343 events. 4264/7343 cut-off events. For 304891/304893 co-relation queries the response was YES. Maximal size of possible extension queue 476. Compared 53395 event pairs, 1590 based on Foata normal form. 4/7333 useless extension candidates. Maximal degree in co-relation 43004. Up to 6289 conditions per place. [2024-06-27 19:32:55,146 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 153 selfloop transitions, 101 changer transitions 0/261 dead transitions. [2024-06-27 19:32:55,147 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 261 transitions, 3907 flow [2024-06-27 19:32:55,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:32:55,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:32:55,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 158 transitions. [2024-06-27 19:32:55,150 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6583333333333333 [2024-06-27 19:32:55,150 INFO L175 Difference]: Start difference. First operand has 167 places, 239 transitions, 3081 flow. Second operand 6 states and 158 transitions. [2024-06-27 19:32:55,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 261 transitions, 3907 flow [2024-06-27 19:32:55,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 261 transitions, 3709 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-27 19:32:55,540 INFO L231 Difference]: Finished difference. Result has 169 places, 239 transitions, 3094 flow [2024-06-27 19:32:55,540 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2883, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3094, PETRI_PLACES=169, PETRI_TRANSITIONS=239} [2024-06-27 19:32:55,542 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 128 predicate places. [2024-06-27 19:32:55,542 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 239 transitions, 3094 flow [2024-06-27 19:32:55,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:55,543 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:55,544 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:55,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-27 19:32:55,544 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:32:55,544 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:55,544 INFO L85 PathProgramCache]: Analyzing trace with hash -157487755, now seen corresponding path program 2 times [2024-06-27 19:32:55,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:55,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949679861] [2024-06-27 19:32:55,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:55,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:55,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:55,599 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:55,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:55,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949679861] [2024-06-27 19:32:55,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949679861] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:55,600 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:55,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:32:55,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764357465] [2024-06-27 19:32:55,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:55,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:32:55,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:55,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:32:55,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:32:55,623 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:32:55,623 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 239 transitions, 3094 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:55,623 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:55,623 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:32:55,623 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:56,542 INFO L124 PetriNetUnfolderBase]: 4258/7334 cut-off events. [2024-06-27 19:32:56,543 INFO L125 PetriNetUnfolderBase]: For 313387/313389 co-relation queries the response was YES. [2024-06-27 19:32:56,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43289 conditions, 7334 events. 4258/7334 cut-off events. For 313387/313389 co-relation queries the response was YES. Maximal size of possible extension queue 476. Compared 53376 event pairs, 1590 based on Foata normal form. 2/7321 useless extension candidates. Maximal degree in co-relation 43210. Up to 6288 conditions per place. [2024-06-27 19:32:56,609 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 146 selfloop transitions, 105 changer transitions 0/258 dead transitions. [2024-06-27 19:32:56,609 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 258 transitions, 3912 flow [2024-06-27 19:32:56,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:32:56,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:32:56,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-06-27 19:32:56,610 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6375 [2024-06-27 19:32:56,611 INFO L175 Difference]: Start difference. First operand has 169 places, 239 transitions, 3094 flow. Second operand 6 states and 153 transitions. [2024-06-27 19:32:56,611 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 258 transitions, 3912 flow [2024-06-27 19:32:57,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 258 transitions, 3737 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-27 19:32:57,053 INFO L231 Difference]: Finished difference. Result has 172 places, 239 transitions, 3138 flow [2024-06-27 19:32:57,053 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2919, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3138, PETRI_PLACES=172, PETRI_TRANSITIONS=239} [2024-06-27 19:32:57,053 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 131 predicate places. [2024-06-27 19:32:57,053 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 239 transitions, 3138 flow [2024-06-27 19:32:57,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:57,054 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:57,054 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:57,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-27 19:32:57,054 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:32:57,054 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:57,054 INFO L85 PathProgramCache]: Analyzing trace with hash 856777830, now seen corresponding path program 2 times [2024-06-27 19:32:57,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:57,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296265278] [2024-06-27 19:32:57,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:57,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:57,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:57,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:57,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:57,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296265278] [2024-06-27 19:32:57,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296265278] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:57,095 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:57,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:32:57,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736671954] [2024-06-27 19:32:57,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:57,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:32:57,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:57,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:32:57,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:32:57,115 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:32:57,115 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 239 transitions, 3138 flow. Second operand has 6 states, 6 states have (on average 16.333333333333332) internal successors, (98), 6 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:57,115 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:57,116 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:32:57,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:57,911 INFO L124 PetriNetUnfolderBase]: 4277/7373 cut-off events. [2024-06-27 19:32:57,911 INFO L125 PetriNetUnfolderBase]: For 328560/328562 co-relation queries the response was YES. [2024-06-27 19:32:57,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43879 conditions, 7373 events. 4277/7373 cut-off events. For 328560/328562 co-relation queries the response was YES. Maximal size of possible extension queue 476. Compared 53777 event pairs, 1638 based on Foata normal form. 3/7361 useless extension candidates. Maximal degree in co-relation 43799. Up to 6307 conditions per place. [2024-06-27 19:32:57,974 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 141 selfloop transitions, 109 changer transitions 0/257 dead transitions. [2024-06-27 19:32:57,975 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 257 transitions, 4027 flow [2024-06-27 19:32:57,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:32:57,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:32:57,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-27 19:32:57,975 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6166666666666667 [2024-06-27 19:32:57,976 INFO L175 Difference]: Start difference. First operand has 172 places, 239 transitions, 3138 flow. Second operand 6 states and 148 transitions. [2024-06-27 19:32:57,976 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 257 transitions, 4027 flow [2024-06-27 19:32:58,461 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 257 transitions, 3844 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-27 19:32:58,464 INFO L231 Difference]: Finished difference. Result has 175 places, 244 transitions, 3265 flow [2024-06-27 19:32:58,464 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2961, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3265, PETRI_PLACES=175, PETRI_TRANSITIONS=244} [2024-06-27 19:32:58,465 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 134 predicate places. [2024-06-27 19:32:58,465 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 244 transitions, 3265 flow [2024-06-27 19:32:58,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.333333333333332) internal successors, (98), 6 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:58,465 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:58,465 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:58,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-27 19:32:58,465 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:32:58,465 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:58,466 INFO L85 PathProgramCache]: Analyzing trace with hash 649194308, now seen corresponding path program 3 times [2024-06-27 19:32:58,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:58,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079320477] [2024-06-27 19:32:58,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:58,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:58,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:58,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:58,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:58,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079320477] [2024-06-27 19:32:58,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079320477] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:58,505 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:58,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:32:58,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440109333] [2024-06-27 19:32:58,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:58,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:32:58,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:58,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:32:58,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:32:58,527 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:32:58,528 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 244 transitions, 3265 flow. Second operand has 6 states, 6 states have (on average 16.333333333333332) internal successors, (98), 6 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:58,528 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:58,528 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:32:58,528 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:59,424 INFO L124 PetriNetUnfolderBase]: 4270/7366 cut-off events. [2024-06-27 19:32:59,425 INFO L125 PetriNetUnfolderBase]: For 338547/338549 co-relation queries the response was YES. [2024-06-27 19:32:59,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44030 conditions, 7366 events. 4270/7366 cut-off events. For 338547/338549 co-relation queries the response was YES. Maximal size of possible extension queue 476. Compared 53743 event pairs, 1638 based on Foata normal form. 3/7354 useless extension candidates. Maximal degree in co-relation 43949. Up to 6303 conditions per place. [2024-06-27 19:32:59,499 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 135 selfloop transitions, 114 changer transitions 0/256 dead transitions. [2024-06-27 19:32:59,499 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 256 transitions, 3979 flow [2024-06-27 19:32:59,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:32:59,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:32:59,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-27 19:32:59,500 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6166666666666667 [2024-06-27 19:32:59,500 INFO L175 Difference]: Start difference. First operand has 175 places, 244 transitions, 3265 flow. Second operand 6 states and 148 transitions. [2024-06-27 19:32:59,501 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 256 transitions, 3979 flow [2024-06-27 19:32:59,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 256 transitions, 3634 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-27 19:32:59,965 INFO L231 Difference]: Finished difference. Result has 176 places, 244 transitions, 3159 flow [2024-06-27 19:32:59,965 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2920, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3159, PETRI_PLACES=176, PETRI_TRANSITIONS=244} [2024-06-27 19:32:59,966 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 135 predicate places. [2024-06-27 19:32:59,966 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 244 transitions, 3159 flow [2024-06-27 19:32:59,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.333333333333332) internal successors, (98), 6 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:59,966 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:59,966 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:59,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-27 19:32:59,967 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:32:59,967 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:59,967 INFO L85 PathProgramCache]: Analyzing trace with hash -1328491333, now seen corresponding path program 3 times [2024-06-27 19:32:59,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:59,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504330367] [2024-06-27 19:32:59,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:59,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:59,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:33:00,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:33:00,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:33:00,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504330367] [2024-06-27 19:33:00,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504330367] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:33:00,030 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:33:00,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:33:00,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206755991] [2024-06-27 19:33:00,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:33:00,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:33:00,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:33:00,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:33:00,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:33:00,057 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:33:00,057 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 244 transitions, 3159 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:00,057 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:33:00,057 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:33:00,057 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:33:00,826 INFO L124 PetriNetUnfolderBase]: 4260/7337 cut-off events. [2024-06-27 19:33:00,827 INFO L125 PetriNetUnfolderBase]: For 347236/347236 co-relation queries the response was YES. [2024-06-27 19:33:00,869 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43849 conditions, 7337 events. 4260/7337 cut-off events. For 347236/347236 co-relation queries the response was YES. Maximal size of possible extension queue 476. Compared 53518 event pairs, 1617 based on Foata normal form. 2/7335 useless extension candidates. Maximal degree in co-relation 43768. Up to 6299 conditions per place. [2024-06-27 19:33:00,891 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 150 selfloop transitions, 106 changer transitions 0/263 dead transitions. [2024-06-27 19:33:00,891 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 263 transitions, 4005 flow [2024-06-27 19:33:00,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:33:00,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:33:00,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-06-27 19:33:00,906 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6375 [2024-06-27 19:33:00,906 INFO L175 Difference]: Start difference. First operand has 176 places, 244 transitions, 3159 flow. Second operand 6 states and 153 transitions. [2024-06-27 19:33:00,906 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 263 transitions, 4005 flow [2024-06-27 19:33:01,472 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 263 transitions, 3708 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-27 19:33:01,475 INFO L231 Difference]: Finished difference. Result has 176 places, 244 transitions, 3083 flow [2024-06-27 19:33:01,476 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2862, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3083, PETRI_PLACES=176, PETRI_TRANSITIONS=244} [2024-06-27 19:33:01,476 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 135 predicate places. [2024-06-27 19:33:01,476 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 244 transitions, 3083 flow [2024-06-27 19:33:01,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:01,476 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:33:01,476 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:33:01,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-27 19:33:01,477 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:33:01,477 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:33:01,477 INFO L85 PathProgramCache]: Analyzing trace with hash 1698461455, now seen corresponding path program 4 times [2024-06-27 19:33:01,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:33:01,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844908788] [2024-06-27 19:33:01,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:33:01,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:33:01,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:33:01,535 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 19:33:01,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:33:01,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844908788] [2024-06-27 19:33:01,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844908788] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:33:01,536 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:33:01,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:33:01,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249637904] [2024-06-27 19:33:01,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:33:01,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:33:01,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:33:01,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:33:01,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:33:01,555 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:33:01,555 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 244 transitions, 3083 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:01,555 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:33:01,555 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:33:01,555 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:33:02,410 INFO L124 PetriNetUnfolderBase]: 4236/7287 cut-off events. [2024-06-27 19:33:02,411 INFO L125 PetriNetUnfolderBase]: For 357359/357359 co-relation queries the response was YES. [2024-06-27 19:33:02,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43487 conditions, 7287 events. 4236/7287 cut-off events. For 357359/357359 co-relation queries the response was YES. Maximal size of possible extension queue 474. Compared 52839 event pairs, 1683 based on Foata normal form. 4/7287 useless extension candidates. Maximal degree in co-relation 43405. Up to 6281 conditions per place. [2024-06-27 19:33:02,483 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 148 selfloop transitions, 104 changer transitions 0/259 dead transitions. [2024-06-27 19:33:02,483 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 259 transitions, 3819 flow [2024-06-27 19:33:02,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:33:02,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:33:02,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 151 transitions. [2024-06-27 19:33:02,484 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6291666666666667 [2024-06-27 19:33:02,484 INFO L175 Difference]: Start difference. First operand has 176 places, 244 transitions, 3083 flow. Second operand 6 states and 151 transitions. [2024-06-27 19:33:02,484 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 259 transitions, 3819 flow [2024-06-27 19:33:02,993 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 259 transitions, 3574 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-27 19:33:02,998 INFO L231 Difference]: Finished difference. Result has 177 places, 244 transitions, 3055 flow [2024-06-27 19:33:02,998 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2838, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3055, PETRI_PLACES=177, PETRI_TRANSITIONS=244} [2024-06-27 19:33:02,999 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 136 predicate places. [2024-06-27 19:33:02,999 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 244 transitions, 3055 flow [2024-06-27 19:33:02,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:02,999 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:33:02,999 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:33:02,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-27 19:33:02,999 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:33:03,000 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:33:03,000 INFO L85 PathProgramCache]: Analyzing trace with hash 1232909783, now seen corresponding path program 5 times [2024-06-27 19:33:03,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:33:03,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033750871] [2024-06-27 19:33:03,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:33:03,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:33:03,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:33:03,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:33:03,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:33:03,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033750871] [2024-06-27 19:33:03,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033750871] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:33:03,053 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:33:03,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:33:03,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821371113] [2024-06-27 19:33:03,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:33:03,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:33:03,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:33:03,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:33:03,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:33:03,078 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:33:03,079 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 244 transitions, 3055 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:03,079 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:33:03,079 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:33:03,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:33:03,955 INFO L124 PetriNetUnfolderBase]: 4213/7261 cut-off events. [2024-06-27 19:33:03,955 INFO L125 PetriNetUnfolderBase]: For 366055/366057 co-relation queries the response was YES. [2024-06-27 19:33:04,002 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43443 conditions, 7261 events. 4213/7261 cut-off events. For 366055/366057 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 52720 event pairs, 1702 based on Foata normal form. 2/7248 useless extension candidates. Maximal degree in co-relation 43360. Up to 6254 conditions per place. [2024-06-27 19:33:04,024 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 139 selfloop transitions, 109 changer transitions 1/256 dead transitions. [2024-06-27 19:33:04,025 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 256 transitions, 3781 flow [2024-06-27 19:33:04,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:33:04,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:33:04,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 146 transitions. [2024-06-27 19:33:04,025 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6083333333333333 [2024-06-27 19:33:04,026 INFO L175 Difference]: Start difference. First operand has 177 places, 244 transitions, 3055 flow. Second operand 6 states and 146 transitions. [2024-06-27 19:33:04,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 256 transitions, 3781 flow [2024-06-27 19:33:04,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 256 transitions, 3549 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-27 19:33:04,490 INFO L231 Difference]: Finished difference. Result has 178 places, 243 transitions, 3033 flow [2024-06-27 19:33:04,490 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2823, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3033, PETRI_PLACES=178, PETRI_TRANSITIONS=243} [2024-06-27 19:33:04,490 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 137 predicate places. [2024-06-27 19:33:04,490 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 243 transitions, 3033 flow [2024-06-27 19:33:04,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:04,491 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:33:04,491 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:33:04,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-27 19:33:04,491 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:33:04,491 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:33:04,491 INFO L85 PathProgramCache]: Analyzing trace with hash 1231953031, now seen corresponding path program 6 times [2024-06-27 19:33:04,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:33:04,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189744033] [2024-06-27 19:33:04,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:33:04,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:33:04,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:33:04,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:33:04,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:33:04,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189744033] [2024-06-27 19:33:04,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189744033] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:33:04,543 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:33:04,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:33:04,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79234208] [2024-06-27 19:33:04,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:33:04,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:33:04,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:33:04,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:33:04,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:33:04,580 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:33:04,585 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 243 transitions, 3033 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:04,586 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:33:04,586 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:33:04,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:33:05,362 INFO L124 PetriNetUnfolderBase]: 4016/6882 cut-off events. [2024-06-27 19:33:05,362 INFO L125 PetriNetUnfolderBase]: For 375419/375421 co-relation queries the response was YES. [2024-06-27 19:33:05,411 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41843 conditions, 6882 events. 4016/6882 cut-off events. For 375419/375421 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 49177 event pairs, 1620 based on Foata normal form. 4/6872 useless extension candidates. Maximal degree in co-relation 41759. Up to 5919 conditions per place. [2024-06-27 19:33:05,435 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 142 selfloop transitions, 102 changer transitions 3/254 dead transitions. [2024-06-27 19:33:05,435 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 254 transitions, 3655 flow [2024-06-27 19:33:05,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:33:05,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:33:05,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 147 transitions. [2024-06-27 19:33:05,436 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6125 [2024-06-27 19:33:05,437 INFO L175 Difference]: Start difference. First operand has 178 places, 243 transitions, 3033 flow. Second operand 6 states and 147 transitions. [2024-06-27 19:33:05,437 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 254 transitions, 3655 flow [2024-06-27 19:33:05,990 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 254 transitions, 3411 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-27 19:33:05,993 INFO L231 Difference]: Finished difference. Result has 179 places, 240 transitions, 2949 flow [2024-06-27 19:33:05,994 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2789, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2949, PETRI_PLACES=179, PETRI_TRANSITIONS=240} [2024-06-27 19:33:05,994 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 138 predicate places. [2024-06-27 19:33:05,994 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 240 transitions, 2949 flow [2024-06-27 19:33:05,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:05,995 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:33:05,995 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:33:05,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-27 19:33:05,995 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:33:05,996 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:33:05,996 INFO L85 PathProgramCache]: Analyzing trace with hash 321902924, now seen corresponding path program 1 times [2024-06-27 19:33:05,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:33:05,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734981888] [2024-06-27 19:33:05,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:33:05,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:33:06,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:33:06,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:33:06,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:33:06,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734981888] [2024-06-27 19:33:06,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734981888] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:33:06,044 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:33:06,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:33:06,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456774792] [2024-06-27 19:33:06,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:33:06,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:33:06,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:33:06,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:33:06,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:33:06,071 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:33:06,072 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 240 transitions, 2949 flow. Second operand has 6 states, 6 states have (on average 16.333333333333332) internal successors, (98), 6 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:06,072 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:33:06,072 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:33:06,072 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:33:06,937 INFO L124 PetriNetUnfolderBase]: 3971/6805 cut-off events. [2024-06-27 19:33:06,937 INFO L125 PetriNetUnfolderBase]: For 387497/387497 co-relation queries the response was YES. [2024-06-27 19:33:06,987 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41880 conditions, 6805 events. 3971/6805 cut-off events. For 387497/387497 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 48408 event pairs, 1594 based on Foata normal form. 3/6804 useless extension candidates. Maximal degree in co-relation 41795. Up to 5845 conditions per place. [2024-06-27 19:33:07,012 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 144 selfloop transitions, 111 changer transitions 1/263 dead transitions. [2024-06-27 19:33:07,012 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 263 transitions, 3785 flow [2024-06-27 19:33:07,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:33:07,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:33:07,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 154 transitions. [2024-06-27 19:33:07,013 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6416666666666667 [2024-06-27 19:33:07,013 INFO L175 Difference]: Start difference. First operand has 179 places, 240 transitions, 2949 flow. Second operand 6 states and 154 transitions. [2024-06-27 19:33:07,013 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 263 transitions, 3785 flow [2024-06-27 19:33:07,635 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 263 transitions, 3447 flow, removed 1 selfloop flow, removed 9 redundant places. [2024-06-27 19:33:07,638 INFO L231 Difference]: Finished difference. Result has 176 places, 244 transitions, 2902 flow [2024-06-27 19:33:07,638 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2617, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2902, PETRI_PLACES=176, PETRI_TRANSITIONS=244} [2024-06-27 19:33:07,639 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 135 predicate places. [2024-06-27 19:33:07,639 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 244 transitions, 2902 flow [2024-06-27 19:33:07,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.333333333333332) internal successors, (98), 6 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:07,639 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:33:07,639 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:33:07,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-27 19:33:07,640 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:33:07,640 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:33:07,640 INFO L85 PathProgramCache]: Analyzing trace with hash 1044349660, now seen corresponding path program 2 times [2024-06-27 19:33:07,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:33:07,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909664070] [2024-06-27 19:33:07,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:33:07,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:33:07,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:33:07,683 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:33:07,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:33:07,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909664070] [2024-06-27 19:33:07,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909664070] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:33:07,684 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:33:07,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:33:07,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541404762] [2024-06-27 19:33:07,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:33:07,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:33:07,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:33:07,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:33:07,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:33:07,712 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:33:07,713 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 244 transitions, 2902 flow. Second operand has 6 states, 6 states have (on average 16.333333333333332) internal successors, (98), 6 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:07,713 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:33:07,713 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:33:07,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:33:08,578 INFO L124 PetriNetUnfolderBase]: 3984/6830 cut-off events. [2024-06-27 19:33:08,578 INFO L125 PetriNetUnfolderBase]: For 401426/401426 co-relation queries the response was YES. [2024-06-27 19:33:08,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42254 conditions, 6830 events. 3984/6830 cut-off events. For 401426/401426 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 48671 event pairs, 1596 based on Foata normal form. 3/6829 useless extension candidates. Maximal degree in co-relation 42168. Up to 5859 conditions per place. [2024-06-27 19:33:08,650 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 147 selfloop transitions, 109 changer transitions 1/264 dead transitions. [2024-06-27 19:33:08,650 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 264 transitions, 3740 flow [2024-06-27 19:33:08,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:33:08,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:33:08,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-27 19:33:08,651 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-27 19:33:08,651 INFO L175 Difference]: Start difference. First operand has 176 places, 244 transitions, 2902 flow. Second operand 6 states and 150 transitions. [2024-06-27 19:33:08,651 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 264 transitions, 3740 flow [2024-06-27 19:33:09,193 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 264 transitions, 3551 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-27 19:33:09,196 INFO L231 Difference]: Finished difference. Result has 179 places, 248 transitions, 3000 flow [2024-06-27 19:33:09,197 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2717, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3000, PETRI_PLACES=179, PETRI_TRANSITIONS=248} [2024-06-27 19:33:09,197 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 138 predicate places. [2024-06-27 19:33:09,197 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 248 transitions, 3000 flow [2024-06-27 19:33:09,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.333333333333332) internal successors, (98), 6 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:09,197 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:33:09,197 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:33:09,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-27 19:33:09,198 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:33:09,198 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:33:09,198 INFO L85 PathProgramCache]: Analyzing trace with hash 1240275104, now seen corresponding path program 3 times [2024-06-27 19:33:09,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:33:09,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95411219] [2024-06-27 19:33:09,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:33:09,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:33:09,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:33:09,245 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 19:33:09,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:33:09,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95411219] [2024-06-27 19:33:09,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95411219] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:33:09,246 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:33:09,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:33:09,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834774654] [2024-06-27 19:33:09,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:33:09,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:33:09,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:33:09,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:33:09,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:33:09,271 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:33:09,271 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 248 transitions, 3000 flow. Second operand has 6 states, 6 states have (on average 16.333333333333332) internal successors, (98), 6 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:09,271 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:33:09,271 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:33:09,271 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:33:10,003 INFO L124 PetriNetUnfolderBase]: 3912/6714 cut-off events. [2024-06-27 19:33:10,004 INFO L125 PetriNetUnfolderBase]: For 411672/411674 co-relation queries the response was YES. [2024-06-27 19:33:10,051 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41929 conditions, 6714 events. 3912/6714 cut-off events. For 411672/411674 co-relation queries the response was YES. Maximal size of possible extension queue 422. Compared 47594 event pairs, 1606 based on Foata normal form. 3/6712 useless extension candidates. Maximal degree in co-relation 41842. Up to 5732 conditions per place. [2024-06-27 19:33:10,074 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 156 selfloop transitions, 93 changer transitions 3/259 dead transitions. [2024-06-27 19:33:10,074 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 259 transitions, 3638 flow [2024-06-27 19:33:10,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:33:10,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:33:10,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 144 transitions. [2024-06-27 19:33:10,075 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-27 19:33:10,075 INFO L175 Difference]: Start difference. First operand has 179 places, 248 transitions, 3000 flow. Second operand 6 states and 144 transitions. [2024-06-27 19:33:10,075 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 259 transitions, 3638 flow [2024-06-27 19:33:10,900 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 259 transitions, 3478 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-27 19:33:10,903 INFO L231 Difference]: Finished difference. Result has 182 places, 245 transitions, 2982 flow [2024-06-27 19:33:10,903 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2840, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2982, PETRI_PLACES=182, PETRI_TRANSITIONS=245} [2024-06-27 19:33:10,904 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 141 predicate places. [2024-06-27 19:33:10,904 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 245 transitions, 2982 flow [2024-06-27 19:33:10,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.333333333333332) internal successors, (98), 6 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:10,904 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:33:10,904 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:33:10,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-27 19:33:10,904 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:33:10,905 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:33:10,905 INFO L85 PathProgramCache]: Analyzing trace with hash -28960083, now seen corresponding path program 1 times [2024-06-27 19:33:10,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:33:10,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529552458] [2024-06-27 19:33:10,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:33:10,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:33:10,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:33:10,962 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 19:33:10,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:33:10,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529552458] [2024-06-27 19:33:10,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529552458] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:33:10,963 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:33:10,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:33:10,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66285374] [2024-06-27 19:33:10,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:33:10,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:33:10,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:33:10,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:33:10,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:33:11,016 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:33:11,017 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 245 transitions, 2982 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:11,017 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:33:11,017 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:33:11,017 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:33:11,873 INFO L124 PetriNetUnfolderBase]: 3772/6454 cut-off events. [2024-06-27 19:33:11,874 INFO L125 PetriNetUnfolderBase]: For 442929/442931 co-relation queries the response was YES. [2024-06-27 19:33:11,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41742 conditions, 6454 events. 3772/6454 cut-off events. For 442929/442931 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 45151 event pairs, 1286 based on Foata normal form. 12/6449 useless extension candidates. Maximal degree in co-relation 41654. Up to 4051 conditions per place. [2024-06-27 19:33:11,941 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 158 selfloop transitions, 121 changer transitions 0/286 dead transitions. [2024-06-27 19:33:11,942 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 286 transitions, 3925 flow [2024-06-27 19:33:11,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:33:11,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:33:11,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 190 transitions. [2024-06-27 19:33:11,943 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6785714285714286 [2024-06-27 19:33:11,943 INFO L175 Difference]: Start difference. First operand has 182 places, 245 transitions, 2982 flow. Second operand 7 states and 190 transitions. [2024-06-27 19:33:11,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 286 transitions, 3925 flow