./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe002_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/safe002_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/safe002_tso.i ./goblint.2024-06-19_11-23-25.files/protection/safe002_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 19:18:00,054 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 19:18:00,090 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 19:18:00,111 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 19:18:00,111 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 19:18:00,146 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 19:18:00,147 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 19:18:00,147 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 19:18:00,148 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 19:18:00,148 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 19:18:00,148 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 19:18:00,148 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 19:18:00,149 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 19:18:00,149 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 19:18:00,149 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 19:18:00,150 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 19:18:00,150 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 19:18:00,150 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 19:18:00,151 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 19:18:00,151 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 19:18:00,151 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 19:18:00,152 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 19:18:00,152 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 19:18:00,152 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 19:18:00,152 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 19:18:00,153 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 19:18:00,153 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 19:18:00,153 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 19:18:00,153 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 19:18:00,154 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 19:18:00,154 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 19:18:00,154 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 19:18:00,155 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 19:18:00,155 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 19:18:00,155 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 19:18:00,155 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 19:18:00,156 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 19:18:00,156 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 19:18:00,156 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 19:18:00,157 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 19:18:00,157 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 19:18:00,157 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 19:18:00,157 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 19:18:00,158 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-27 19:18:00,368 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 19:18:00,387 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 19:18:00,389 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 19:18:00,390 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 19:18:00,391 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 19:18:00,392 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe002_tso.i [2024-06-27 19:18:01,525 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 19:18:01,773 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 19:18:01,774 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe002_tso.i [2024-06-27 19:18:01,787 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3bf5e11c9/7696a92ed6b24e599cf0b0cb7b2afffe/FLAGacebc0d89 [2024-06-27 19:18:01,798 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3bf5e11c9/7696a92ed6b24e599cf0b0cb7b2afffe [2024-06-27 19:18:01,801 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 19:18:01,801 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 19:18:01,802 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/safe002_tso.yml/witness.yml [2024-06-27 19:18:01,898 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 19:18:01,899 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 19:18:01,900 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 19:18:01,901 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 19:18:01,905 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 19:18:01,906 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 07:18:01" (1/2) ... [2024-06-27 19:18:01,907 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3bf26eb0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:18:01, skipping insertion in model container [2024-06-27 19:18:01,907 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 07:18:01" (1/2) ... [2024-06-27 19:18:01,908 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@5d6fc336 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:18:01, skipping insertion in model container [2024-06-27 19:18:01,908 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 07:18:01" (2/2) ... [2024-06-27 19:18:01,909 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3bf26eb0 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 07:18:01, skipping insertion in model container [2024-06-27 19:18:01,909 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 07:18:01" (2/2) ... [2024-06-27 19:18:01,909 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 19:18:01,959 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 19:18:01,960 INFO L97 edCorrectnessWitness]: Location invariant before [L783-L783] (((((! multithreaded || ((y == 0 || y == 1) || y == 2)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)) [2024-06-27 19:18:01,960 INFO L97 edCorrectnessWitness]: Location invariant before [L784-L784] (((((! multithreaded || ((y == 0 || y == 1) || y == 2)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)) [2024-06-27 19:18:01,960 INFO L97 edCorrectnessWitness]: Location invariant before [L781-L781] (((((! multithreaded || ((y == 0 || y == 1) || y == 2)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)) [2024-06-27 19:18:01,961 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 19:18:01,961 INFO L106 edCorrectnessWitness]: ghost_update [L779-L779] multithreaded = 1; [2024-06-27 19:18:01,996 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 19:18:02,366 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 19:18:02,376 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-27 19:18:02,450 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 19:18:02,497 INFO L206 MainTranslator]: Completed translation [2024-06-27 19:18:02,498 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 07:18:02 WrapperNode [2024-06-27 19:18:02,498 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 19:18:02,499 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 19:18:02,499 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 19:18:02,499 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 19:18:02,505 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 07:18:02" (1/1) ... [2024-06-27 19:18:02,517 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 07:18:02" (1/1) ... [2024-06-27 19:18:02,535 INFO L138 Inliner]: procedures = 175, calls = 42, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 66 [2024-06-27 19:18:02,536 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 19:18:02,536 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 19:18:02,536 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 19:18:02,536 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 19:18:02,544 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 07:18:02" (1/1) ... [2024-06-27 19:18:02,544 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 07:18:02" (1/1) ... [2024-06-27 19:18:02,546 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 07:18:02" (1/1) ... [2024-06-27 19:18:02,556 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 19:18:02,557 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 07:18:02" (1/1) ... [2024-06-27 19:18:02,557 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 07:18:02" (1/1) ... [2024-06-27 19:18:02,561 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 07:18:02" (1/1) ... [2024-06-27 19:18:02,563 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 07:18:02" (1/1) ... [2024-06-27 19:18:02,564 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 07:18:02" (1/1) ... [2024-06-27 19:18:02,565 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 07:18:02" (1/1) ... [2024-06-27 19:18:02,567 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 19:18:02,567 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 19:18:02,567 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 19:18:02,568 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 19:18:02,568 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 07:18:02" (1/1) ... [2024-06-27 19:18:02,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 19:18:02,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 19:18:02,593 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 19:18:02,605 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 19:18:02,631 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 19:18:02,632 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 19:18:02,632 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-27 19:18:02,632 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-27 19:18:02,632 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-27 19:18:02,632 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-27 19:18:02,633 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-27 19:18:02,633 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-27 19:18:02,633 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 19:18:02,633 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 19:18:02,633 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 19:18:02,633 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 19:18:02,634 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 19:18:02,721 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 19:18:02,723 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 19:18:02,885 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 19:18:02,885 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 19:18:02,960 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 19:18:02,960 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-27 19:18:02,961 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 07:18:02 BoogieIcfgContainer [2024-06-27 19:18:02,961 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 19:18:02,962 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 19:18:02,962 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 19:18:02,966 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 19:18:02,966 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 07:18:01" (1/4) ... [2024-06-27 19:18:02,967 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2cfb31d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 07:18:02, skipping insertion in model container [2024-06-27 19:18:02,967 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 07:18:01" (2/4) ... [2024-06-27 19:18:02,967 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2cfb31d and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 07:18:02, skipping insertion in model container [2024-06-27 19:18:02,968 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 07:18:02" (3/4) ... [2024-06-27 19:18:02,968 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2cfb31d and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 07:18:02, skipping insertion in model container [2024-06-27 19:18:02,968 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 07:18:02" (4/4) ... [2024-06-27 19:18:02,969 INFO L112 eAbstractionObserver]: Analyzing ICFG safe002_tso.i [2024-06-27 19:18:02,983 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 19:18:02,984 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-27 19:18:02,985 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 19:18:03,049 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 19:18:03,077 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 50 places, 40 transitions, 92 flow [2024-06-27 19:18:03,106 INFO L124 PetriNetUnfolderBase]: 0/37 cut-off events. [2024-06-27 19:18:03,106 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 19:18:03,108 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 62 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 19:18:03,108 INFO L82 GeneralOperation]: Start removeDead. Operand has 50 places, 40 transitions, 92 flow [2024-06-27 19:18:03,110 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 41 places, 31 transitions, 71 flow [2024-06-27 19:18:03,117 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 19:18:03,122 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;@7692edc7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 19:18:03,122 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-27 19:18:03,125 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 19:18:03,125 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-27 19:18:03,125 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 19:18:03,126 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:18:03,126 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-27 19:18:03,127 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 19:18:03,131 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:18:03,131 INFO L85 PathProgramCache]: Analyzing trace with hash 219930474, now seen corresponding path program 1 times [2024-06-27 19:18:03,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:18:03,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928094186] [2024-06-27 19:18:03,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:18:03,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:18:03,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:18:03,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:18:03,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:18:03,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928094186] [2024-06-27 19:18:03,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928094186] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:18:03,563 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:18:03,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 19:18:03,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633510710] [2024-06-27 19:18:03,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:18:03,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 19:18:03,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:18:03,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 19:18:03,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 19:18:03,635 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 40 [2024-06-27 19:18:03,637 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 31 transitions, 71 flow. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:03,637 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:18:03,637 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 40 [2024-06-27 19:18:03,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:18:03,779 INFO L124 PetriNetUnfolderBase]: 430/713 cut-off events. [2024-06-27 19:18:03,781 INFO L125 PetriNetUnfolderBase]: For 17/17 co-relation queries the response was YES. [2024-06-27 19:18:03,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1436 conditions, 713 events. 430/713 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 3407 event pairs, 273 based on Foata normal form. 1/675 useless extension candidates. Maximal degree in co-relation 1424. Up to 672 conditions per place. [2024-06-27 19:18:03,793 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 27 selfloop transitions, 4 changer transitions 0/41 dead transitions. [2024-06-27 19:18:03,793 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 41 transitions, 159 flow [2024-06-27 19:18:03,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 19:18:03,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 19:18:03,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 85 transitions. [2024-06-27 19:18:03,803 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7083333333333334 [2024-06-27 19:18:03,805 INFO L175 Difference]: Start difference. First operand has 41 places, 31 transitions, 71 flow. Second operand 3 states and 85 transitions. [2024-06-27 19:18:03,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 41 transitions, 159 flow [2024-06-27 19:18:03,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 41 transitions, 154 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-27 19:18:03,809 INFO L231 Difference]: Finished difference. Result has 41 places, 34 transitions, 98 flow [2024-06-27 19:18:03,810 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 19:18:03,814 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 0 predicate places. [2024-06-27 19:18:03,815 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 34 transitions, 98 flow [2024-06-27 19:18:03,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:03,816 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:18:03,816 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:18:03,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 19:18:03,816 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 19:18:03,819 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:18:03,819 INFO L85 PathProgramCache]: Analyzing trace with hash 1029876338, now seen corresponding path program 1 times [2024-06-27 19:18:03,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:18:03,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164046416] [2024-06-27 19:18:03,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:18:03,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:18:03,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:18:04,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:18:04,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:18:04,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164046416] [2024-06-27 19:18:04,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164046416] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:18:04,039 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:18:04,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:18:04,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615338531] [2024-06-27 19:18:04,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:18:04,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:18:04,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:18:04,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:18:04,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:18:04,110 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-27 19:18:04,111 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 34 transitions, 98 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 19:18:04,111 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:18:04,111 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-27 19:18:04,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:18:04,369 INFO L124 PetriNetUnfolderBase]: 755/1225 cut-off events. [2024-06-27 19:18:04,369 INFO L125 PetriNetUnfolderBase]: For 226/240 co-relation queries the response was YES. [2024-06-27 19:18:04,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2818 conditions, 1225 events. 755/1225 cut-off events. For 226/240 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 5975 event pairs, 367 based on Foata normal form. 13/1205 useless extension candidates. Maximal degree in co-relation 2806. Up to 1093 conditions per place. [2024-06-27 19:18:04,376 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 35 selfloop transitions, 6 changer transitions 0/49 dead transitions. [2024-06-27 19:18:04,377 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 49 transitions, 218 flow [2024-06-27 19:18:04,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 19:18:04,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 19:18:04,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 104 transitions. [2024-06-27 19:18:04,381 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.65 [2024-06-27 19:18:04,381 INFO L175 Difference]: Start difference. First operand has 41 places, 34 transitions, 98 flow. Second operand 4 states and 104 transitions. [2024-06-27 19:18:04,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 49 transitions, 218 flow [2024-06-27 19:18:04,383 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 49 transitions, 214 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 19:18:04,385 INFO L231 Difference]: Finished difference. Result has 43 places, 35 transitions, 121 flow [2024-06-27 19:18:04,385 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=121, PETRI_PLACES=43, PETRI_TRANSITIONS=35} [2024-06-27 19:18:04,386 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 2 predicate places. [2024-06-27 19:18:04,386 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 35 transitions, 121 flow [2024-06-27 19:18:04,387 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 19:18:04,387 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:18:04,388 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:18:04,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 19:18:04,390 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:18:04,393 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:18:04,393 INFO L85 PathProgramCache]: Analyzing trace with hash 933975979, now seen corresponding path program 1 times [2024-06-27 19:18:04,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:18:04,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548739793] [2024-06-27 19:18:04,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:18:04,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:18:04,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:18:04,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:18:04,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:18:04,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548739793] [2024-06-27 19:18:04,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548739793] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:18:04,534 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:18:04,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 19:18:04,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848032010] [2024-06-27 19:18:04,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:18:04,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 19:18:04,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:18:04,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 19:18:04,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-27 19:18:04,562 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 40 [2024-06-27 19:18:04,563 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 35 transitions, 121 flow. Second operand has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:04,563 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:18:04,563 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 40 [2024-06-27 19:18:04,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:18:04,656 INFO L124 PetriNetUnfolderBase]: 583/983 cut-off events. [2024-06-27 19:18:04,656 INFO L125 PetriNetUnfolderBase]: For 496/499 co-relation queries the response was YES. [2024-06-27 19:18:04,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2451 conditions, 983 events. 583/983 cut-off events. For 496/499 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 4829 event pairs, 249 based on Foata normal form. 4/984 useless extension candidates. Maximal degree in co-relation 2437. Up to 889 conditions per place. [2024-06-27 19:18:04,663 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 36 selfloop transitions, 7 changer transitions 0/52 dead transitions. [2024-06-27 19:18:04,663 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 52 transitions, 259 flow [2024-06-27 19:18:04,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 19:18:04,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 19:18:04,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 104 transitions. [2024-06-27 19:18:04,667 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.65 [2024-06-27 19:18:04,667 INFO L175 Difference]: Start difference. First operand has 43 places, 35 transitions, 121 flow. Second operand 4 states and 104 transitions. [2024-06-27 19:18:04,667 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 52 transitions, 259 flow [2024-06-27 19:18:04,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 52 transitions, 242 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-27 19:18:04,670 INFO L231 Difference]: Finished difference. Result has 46 places, 41 transitions, 164 flow [2024-06-27 19:18:04,670 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=164, PETRI_PLACES=46, PETRI_TRANSITIONS=41} [2024-06-27 19:18:04,671 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 5 predicate places. [2024-06-27 19:18:04,671 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 41 transitions, 164 flow [2024-06-27 19:18:04,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:04,672 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:18:04,672 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:18:04,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 19:18:04,672 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:18:04,673 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:18:04,673 INFO L85 PathProgramCache]: Analyzing trace with hash -1111514431, now seen corresponding path program 1 times [2024-06-27 19:18:04,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:18:04,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874403338] [2024-06-27 19:18:04,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:18:04,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:18:04,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:18:04,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:18:04,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:18:04,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874403338] [2024-06-27 19:18:04,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874403338] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:18:04,812 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:18:04,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 19:18:04,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381326450] [2024-06-27 19:18:04,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:18:04,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 19:18:04,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:18:04,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 19:18:04,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 19:18:04,837 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:18:04,839 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 41 transitions, 164 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 19:18:04,839 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:18:04,840 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:18:04,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:18:04,982 INFO L124 PetriNetUnfolderBase]: 890/1463 cut-off events. [2024-06-27 19:18:04,982 INFO L125 PetriNetUnfolderBase]: For 1126/1126 co-relation queries the response was YES. [2024-06-27 19:18:04,985 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3948 conditions, 1463 events. 890/1463 cut-off events. For 1126/1126 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 7226 event pairs, 354 based on Foata normal form. 2/1463 useless extension candidates. Maximal degree in co-relation 3932. Up to 1332 conditions per place. [2024-06-27 19:18:04,992 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 48 selfloop transitions, 10 changer transitions 0/65 dead transitions. [2024-06-27 19:18:04,992 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 65 transitions, 345 flow [2024-06-27 19:18:04,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:18:04,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:18:04,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 119 transitions. [2024-06-27 19:18:04,993 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.595 [2024-06-27 19:18:04,994 INFO L175 Difference]: Start difference. First operand has 46 places, 41 transitions, 164 flow. Second operand 5 states and 119 transitions. [2024-06-27 19:18:04,994 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 65 transitions, 345 flow [2024-06-27 19:18:04,996 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 65 transitions, 341 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-06-27 19:18:04,997 INFO L231 Difference]: Finished difference. Result has 53 places, 50 transitions, 233 flow [2024-06-27 19:18:04,997 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=233, PETRI_PLACES=53, PETRI_TRANSITIONS=50} [2024-06-27 19:18:04,997 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 12 predicate places. [2024-06-27 19:18:04,998 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 50 transitions, 233 flow [2024-06-27 19:18:04,998 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 19:18:04,998 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:18:04,998 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:18:04,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 19:18:04,998 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 19:18:04,999 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:18:04,999 INFO L85 PathProgramCache]: Analyzing trace with hash 187187522, now seen corresponding path program 1 times [2024-06-27 19:18:04,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:18:04,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589605317] [2024-06-27 19:18:04,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:18:05,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:18:05,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:18:05,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:18:05,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:18:05,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589605317] [2024-06-27 19:18:05,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589605317] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:18:05,113 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:18:05,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:18:05,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102313627] [2024-06-27 19:18:05,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:18:05,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:18:05,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:18:05,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:18:05,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:18:05,149 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-27 19:18:05,150 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 50 transitions, 233 flow. Second operand has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:05,150 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:18:05,150 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-27 19:18:05,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:18:05,302 INFO L124 PetriNetUnfolderBase]: 885/1465 cut-off events. [2024-06-27 19:18:05,303 INFO L125 PetriNetUnfolderBase]: For 1967/2000 co-relation queries the response was YES. [2024-06-27 19:18:05,305 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4476 conditions, 1465 events. 885/1465 cut-off events. For 1967/2000 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 7379 event pairs, 300 based on Foata normal form. 15/1463 useless extension candidates. Maximal degree in co-relation 4455. Up to 1265 conditions per place. [2024-06-27 19:18:05,311 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 41 selfloop transitions, 14 changer transitions 0/66 dead transitions. [2024-06-27 19:18:05,312 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 66 transitions, 395 flow [2024-06-27 19:18:05,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 19:18:05,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 19:18:05,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 105 transitions. [2024-06-27 19:18:05,313 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.65625 [2024-06-27 19:18:05,313 INFO L175 Difference]: Start difference. First operand has 53 places, 50 transitions, 233 flow. Second operand 4 states and 105 transitions. [2024-06-27 19:18:05,313 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 66 transitions, 395 flow [2024-06-27 19:18:05,315 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 66 transitions, 395 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-06-27 19:18:05,316 INFO L231 Difference]: Finished difference. Result has 57 places, 53 transitions, 297 flow [2024-06-27 19:18:05,316 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=233, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=297, PETRI_PLACES=57, PETRI_TRANSITIONS=53} [2024-06-27 19:18:05,317 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 16 predicate places. [2024-06-27 19:18:05,317 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 53 transitions, 297 flow [2024-06-27 19:18:05,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:05,318 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:18:05,318 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:18:05,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 19:18:05,318 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 19:18:05,318 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:18:05,318 INFO L85 PathProgramCache]: Analyzing trace with hash -934672516, now seen corresponding path program 2 times [2024-06-27 19:18:05,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:18:05,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519050639] [2024-06-27 19:18:05,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:18:05,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:18:05,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:18:05,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:18:05,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:18:05,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519050639] [2024-06-27 19:18:05,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519050639] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:18:05,416 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:18:05,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:18:05,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507527836] [2024-06-27 19:18:05,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:18:05,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:18:05,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:18:05,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:18:05,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:18:05,452 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-27 19:18:05,453 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 53 transitions, 297 flow. Second operand has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:05,453 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:18:05,453 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-27 19:18:05,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:18:05,588 INFO L124 PetriNetUnfolderBase]: 877/1456 cut-off events. [2024-06-27 19:18:05,588 INFO L125 PetriNetUnfolderBase]: For 3045/3091 co-relation queries the response was YES. [2024-06-27 19:18:05,590 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4930 conditions, 1456 events. 877/1456 cut-off events. For 3045/3091 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 7346 event pairs, 300 based on Foata normal form. 20/1459 useless extension candidates. Maximal degree in co-relation 4906. Up to 1242 conditions per place. [2024-06-27 19:18:05,597 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 45 selfloop transitions, 17 changer transitions 0/73 dead transitions. [2024-06-27 19:18:05,598 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 73 transitions, 489 flow [2024-06-27 19:18:05,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:18:05,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:18:05,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 127 transitions. [2024-06-27 19:18:05,599 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.635 [2024-06-27 19:18:05,599 INFO L175 Difference]: Start difference. First operand has 57 places, 53 transitions, 297 flow. Second operand 5 states and 127 transitions. [2024-06-27 19:18:05,599 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 73 transitions, 489 flow [2024-06-27 19:18:05,603 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 73 transitions, 453 flow, removed 9 selfloop flow, removed 2 redundant places. [2024-06-27 19:18:05,604 INFO L231 Difference]: Finished difference. Result has 60 places, 56 transitions, 331 flow [2024-06-27 19:18:05,604 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=265, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=331, PETRI_PLACES=60, PETRI_TRANSITIONS=56} [2024-06-27 19:18:05,604 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 19 predicate places. [2024-06-27 19:18:05,605 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 56 transitions, 331 flow [2024-06-27 19:18:05,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:05,605 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:18:05,605 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:18:05,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 19:18:05,605 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 19:18:05,606 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:18:05,606 INFO L85 PathProgramCache]: Analyzing trace with hash -934672330, now seen corresponding path program 1 times [2024-06-27 19:18:05,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:18:05,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465305356] [2024-06-27 19:18:05,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:18:05,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:18:05,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:18:05,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:18:05,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:18:05,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465305356] [2024-06-27 19:18:05,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465305356] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:18:05,699 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:18:05,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:18:05,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977835591] [2024-06-27 19:18:05,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:18:05,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:18:05,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:18:05,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:18:05,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:18:05,722 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:18:05,722 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 56 transitions, 331 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 19:18:05,722 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:18:05,722 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:18:05,723 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:18:05,901 INFO L124 PetriNetUnfolderBase]: 965/1584 cut-off events. [2024-06-27 19:18:05,901 INFO L125 PetriNetUnfolderBase]: For 3011/3013 co-relation queries the response was YES. [2024-06-27 19:18:05,922 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5280 conditions, 1584 events. 965/1584 cut-off events. For 3011/3013 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 8060 event pairs, 282 based on Foata normal form. 8/1589 useless extension candidates. Maximal degree in co-relation 5255. Up to 1336 conditions per place. [2024-06-27 19:18:05,929 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 60 selfloop transitions, 27 changer transitions 0/94 dead transitions. [2024-06-27 19:18:05,930 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 94 transitions, 651 flow [2024-06-27 19:18:05,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:18:05,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:18:05,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-27 19:18:05,931 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5964285714285714 [2024-06-27 19:18:05,931 INFO L175 Difference]: Start difference. First operand has 60 places, 56 transitions, 331 flow. Second operand 7 states and 167 transitions. [2024-06-27 19:18:05,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 94 transitions, 651 flow [2024-06-27 19:18:05,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 94 transitions, 609 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-27 19:18:05,937 INFO L231 Difference]: Finished difference. Result has 66 places, 71 transitions, 456 flow [2024-06-27 19:18:05,937 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=289, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=456, PETRI_PLACES=66, PETRI_TRANSITIONS=71} [2024-06-27 19:18:05,938 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 25 predicate places. [2024-06-27 19:18:05,938 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 71 transitions, 456 flow [2024-06-27 19:18:05,938 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 19:18:05,938 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:18:05,938 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:18:05,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 19:18:05,939 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 19:18:05,939 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:18:05,939 INFO L85 PathProgramCache]: Analyzing trace with hash 2137423252, now seen corresponding path program 2 times [2024-06-27 19:18:05,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:18:05,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183105465] [2024-06-27 19:18:05,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:18:05,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:18:05,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:18:06,031 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:18:06,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:18:06,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183105465] [2024-06-27 19:18:06,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183105465] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:18:06,032 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:18:06,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:18:06,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258346721] [2024-06-27 19:18:06,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:18:06,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:18:06,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:18:06,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:18:06,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:18:06,054 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:18:06,055 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 71 transitions, 456 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 19:18:06,055 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:18:06,055 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:18:06,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:18:06,217 INFO L124 PetriNetUnfolderBase]: 960/1588 cut-off events. [2024-06-27 19:18:06,218 INFO L125 PetriNetUnfolderBase]: For 4726/4728 co-relation queries the response was YES. [2024-06-27 19:18:06,220 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6188 conditions, 1588 events. 960/1588 cut-off events. For 4726/4728 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 8060 event pairs, 328 based on Foata normal form. 4/1589 useless extension candidates. Maximal degree in co-relation 6160. Up to 1384 conditions per place. [2024-06-27 19:18:06,227 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 74 selfloop transitions, 20 changer transitions 0/101 dead transitions. [2024-06-27 19:18:06,228 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 101 transitions, 780 flow [2024-06-27 19:18:06,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:18:06,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:18:06,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 143 transitions. [2024-06-27 19:18:06,229 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5958333333333333 [2024-06-27 19:18:06,229 INFO L175 Difference]: Start difference. First operand has 66 places, 71 transitions, 456 flow. Second operand 6 states and 143 transitions. [2024-06-27 19:18:06,230 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 101 transitions, 780 flow [2024-06-27 19:18:06,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 101 transitions, 730 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-27 19:18:06,240 INFO L231 Difference]: Finished difference. Result has 72 places, 82 transitions, 581 flow [2024-06-27 19:18:06,240 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=418, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=581, PETRI_PLACES=72, PETRI_TRANSITIONS=82} [2024-06-27 19:18:06,242 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 31 predicate places. [2024-06-27 19:18:06,242 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 82 transitions, 581 flow [2024-06-27 19:18:06,243 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 19:18:06,243 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:18:06,243 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:18:06,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-27 19:18:06,243 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 19:18:06,243 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:18:06,244 INFO L85 PathProgramCache]: Analyzing trace with hash 1281530880, now seen corresponding path program 1 times [2024-06-27 19:18:06,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:18:06,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158535499] [2024-06-27 19:18:06,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:18:06,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:18:06,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:18:06,338 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:18:06,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:18:06,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158535499] [2024-06-27 19:18:06,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158535499] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:18:06,339 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:18:06,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:18:06,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651358661] [2024-06-27 19:18:06,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:18:06,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:18:06,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:18:06,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:18:06,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:18:06,363 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:18:06,363 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 82 transitions, 581 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 19:18:06,363 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:18:06,363 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:18:06,363 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:18:06,510 INFO L124 PetriNetUnfolderBase]: 952/1574 cut-off events. [2024-06-27 19:18:06,511 INFO L125 PetriNetUnfolderBase]: For 5734/5734 co-relation queries the response was YES. [2024-06-27 19:18:06,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6457 conditions, 1574 events. 952/1574 cut-off events. For 5734/5734 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 7971 event pairs, 305 based on Foata normal form. 4/1576 useless extension candidates. Maximal degree in co-relation 6425. Up to 1401 conditions per place. [2024-06-27 19:18:06,524 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 85 selfloop transitions, 12 changer transitions 0/104 dead transitions. [2024-06-27 19:18:06,525 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 104 transitions, 843 flow [2024-06-27 19:18:06,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:18:06,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:18:06,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 140 transitions. [2024-06-27 19:18:06,526 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-06-27 19:18:06,526 INFO L175 Difference]: Start difference. First operand has 72 places, 82 transitions, 581 flow. Second operand 6 states and 140 transitions. [2024-06-27 19:18:06,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 104 transitions, 843 flow [2024-06-27 19:18:06,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 104 transitions, 825 flow, removed 9 selfloop flow, removed 0 redundant places. [2024-06-27 19:18:06,539 INFO L231 Difference]: Finished difference. Result has 78 places, 84 transitions, 616 flow [2024-06-27 19:18:06,540 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=563, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=616, PETRI_PLACES=78, PETRI_TRANSITIONS=84} [2024-06-27 19:18:06,540 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 37 predicate places. [2024-06-27 19:18:06,541 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 84 transitions, 616 flow [2024-06-27 19:18:06,541 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 19:18:06,541 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:18:06,541 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:18:06,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-27 19:18:06,541 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 19:18:06,542 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:18:06,542 INFO L85 PathProgramCache]: Analyzing trace with hash 1626430724, now seen corresponding path program 1 times [2024-06-27 19:18:06,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:18:06,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031629746] [2024-06-27 19:18:06,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:18:06,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:18:06,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:18:06,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:18:06,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:18:06,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031629746] [2024-06-27 19:18:06,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031629746] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:18:06,669 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:18:06,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:18:06,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318467679] [2024-06-27 19:18:06,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:18:06,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:18:06,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:18:06,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:18:06,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:18:06,697 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:18:06,698 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 84 transitions, 616 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 19:18:06,698 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:18:06,698 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:18:06,698 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:18:06,887 INFO L124 PetriNetUnfolderBase]: 1092/1787 cut-off events. [2024-06-27 19:18:06,887 INFO L125 PetriNetUnfolderBase]: For 7493/7497 co-relation queries the response was YES. [2024-06-27 19:18:06,891 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7694 conditions, 1787 events. 1092/1787 cut-off events. For 7493/7497 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 9185 event pairs, 278 based on Foata normal form. 5/1787 useless extension candidates. Maximal degree in co-relation 7659. Up to 1459 conditions per place. [2024-06-27 19:18:06,899 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 82 selfloop transitions, 51 changer transitions 0/140 dead transitions. [2024-06-27 19:18:06,899 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 140 transitions, 1264 flow [2024-06-27 19:18:06,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:18:06,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:18:06,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-06-27 19:18:06,901 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6375 [2024-06-27 19:18:06,901 INFO L175 Difference]: Start difference. First operand has 78 places, 84 transitions, 616 flow. Second operand 6 states and 153 transitions. [2024-06-27 19:18:06,901 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 140 transitions, 1264 flow [2024-06-27 19:18:06,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 140 transitions, 1229 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-27 19:18:06,914 INFO L231 Difference]: Finished difference. Result has 82 places, 118 transitions, 1074 flow [2024-06-27 19:18:06,914 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=581, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1074, PETRI_PLACES=82, PETRI_TRANSITIONS=118} [2024-06-27 19:18:06,915 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 41 predicate places. [2024-06-27 19:18:06,915 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 118 transitions, 1074 flow [2024-06-27 19:18:06,915 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 19:18:06,915 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:18:06,915 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:18:06,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-27 19:18:06,915 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 19:18:06,916 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:18:06,916 INFO L85 PathProgramCache]: Analyzing trace with hash 1089929948, now seen corresponding path program 2 times [2024-06-27 19:18:06,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:18:06,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284326342] [2024-06-27 19:18:06,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:18:06,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:18:06,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:18:07,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:18:07,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:18:07,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284326342] [2024-06-27 19:18:07,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284326342] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:18:07,009 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:18:07,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:18:07,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429985157] [2024-06-27 19:18:07,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:18:07,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:18:07,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:18:07,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:18:07,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:18:07,042 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:18:07,043 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 118 transitions, 1074 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 19:18:07,043 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:18:07,043 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:18:07,043 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:18:07,292 INFO L124 PetriNetUnfolderBase]: 1163/1911 cut-off events. [2024-06-27 19:18:07,292 INFO L125 PetriNetUnfolderBase]: For 11177/11181 co-relation queries the response was YES. [2024-06-27 19:18:07,297 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9401 conditions, 1911 events. 1163/1911 cut-off events. For 11177/11181 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 9972 event pairs, 276 based on Foata normal form. 5/1911 useless extension candidates. Maximal degree in co-relation 9363. Up to 1402 conditions per place. [2024-06-27 19:18:07,306 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 76 selfloop transitions, 78 changer transitions 0/161 dead transitions. [2024-06-27 19:18:07,307 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 161 transitions, 1714 flow [2024-06-27 19:18:07,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:18:07,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:18:07,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-27 19:18:07,308 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.615625 [2024-06-27 19:18:07,308 INFO L175 Difference]: Start difference. First operand has 82 places, 118 transitions, 1074 flow. Second operand 8 states and 197 transitions. [2024-06-27 19:18:07,308 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 161 transitions, 1714 flow [2024-06-27 19:18:07,327 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 161 transitions, 1684 flow, removed 11 selfloop flow, removed 1 redundant places. [2024-06-27 19:18:07,329 INFO L231 Difference]: Finished difference. Result has 91 places, 132 transitions, 1438 flow [2024-06-27 19:18:07,329 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1044, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1438, PETRI_PLACES=91, PETRI_TRANSITIONS=132} [2024-06-27 19:18:07,330 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 50 predicate places. [2024-06-27 19:18:07,330 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 132 transitions, 1438 flow [2024-06-27 19:18:07,330 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 19:18:07,330 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:18:07,331 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:18:07,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-27 19:18:07,331 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 19:18:07,331 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:18:07,331 INFO L85 PathProgramCache]: Analyzing trace with hash 1089924368, now seen corresponding path program 3 times [2024-06-27 19:18:07,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:18:07,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049129466] [2024-06-27 19:18:07,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:18:07,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:18:07,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:18:07,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:18:07,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:18:07,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049129466] [2024-06-27 19:18:07,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049129466] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:18:07,423 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:18:07,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:18:07,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053414912] [2024-06-27 19:18:07,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:18:07,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:18:07,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:18:07,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:18:07,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:18:07,456 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:18:07,456 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 132 transitions, 1438 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 19:18:07,456 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:18:07,456 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:18:07,456 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:18:07,705 INFO L124 PetriNetUnfolderBase]: 1186/1953 cut-off events. [2024-06-27 19:18:07,705 INFO L125 PetriNetUnfolderBase]: For 14976/14980 co-relation queries the response was YES. [2024-06-27 19:18:07,710 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10833 conditions, 1953 events. 1186/1953 cut-off events. For 14976/14980 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 10290 event pairs, 278 based on Foata normal form. 5/1953 useless extension candidates. Maximal degree in co-relation 10791. Up to 1425 conditions per place. [2024-06-27 19:18:07,719 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 85 selfloop transitions, 83 changer transitions 0/175 dead transitions. [2024-06-27 19:18:07,719 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 175 transitions, 2076 flow [2024-06-27 19:18:07,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:18:07,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:18:07,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 222 transitions. [2024-06-27 19:18:07,721 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6166666666666667 [2024-06-27 19:18:07,721 INFO L175 Difference]: Start difference. First operand has 91 places, 132 transitions, 1438 flow. Second operand 9 states and 222 transitions. [2024-06-27 19:18:07,721 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 175 transitions, 2076 flow [2024-06-27 19:18:07,747 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 175 transitions, 1990 flow, removed 26 selfloop flow, removed 3 redundant places. [2024-06-27 19:18:07,750 INFO L231 Difference]: Finished difference. Result has 98 places, 140 transitions, 1651 flow [2024-06-27 19:18:07,750 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1352, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1651, PETRI_PLACES=98, PETRI_TRANSITIONS=140} [2024-06-27 19:18:07,750 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 57 predicate places. [2024-06-27 19:18:07,751 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 140 transitions, 1651 flow [2024-06-27 19:18:07,751 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 19:18:07,751 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:18:07,751 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:18:07,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-27 19:18:07,751 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:18:07,752 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:18:07,752 INFO L85 PathProgramCache]: Analyzing trace with hash 1835612478, now seen corresponding path program 4 times [2024-06-27 19:18:07,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:18:07,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323075139] [2024-06-27 19:18:07,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:18:07,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:18:07,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:18:07,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:18:07,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:18:07,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323075139] [2024-06-27 19:18:07,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323075139] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:18:07,855 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:18:07,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:18:07,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899369753] [2024-06-27 19:18:07,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:18:07,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:18:07,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:18:07,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:18:07,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:18:07,888 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:18:07,888 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 140 transitions, 1651 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 19:18:07,888 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:18:07,888 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:18:07,888 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:18:08,090 INFO L124 PetriNetUnfolderBase]: 1181/1961 cut-off events. [2024-06-27 19:18:08,090 INFO L125 PetriNetUnfolderBase]: For 16094/16098 co-relation queries the response was YES. [2024-06-27 19:18:08,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11070 conditions, 1961 events. 1181/1961 cut-off events. For 16094/16098 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 10295 event pairs, 315 based on Foata normal form. 3/1959 useless extension candidates. Maximal degree in co-relation 11025. Up to 1602 conditions per place. [2024-06-27 19:18:08,105 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 131 selfloop transitions, 42 changer transitions 0/180 dead transitions. [2024-06-27 19:18:08,106 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 180 transitions, 2263 flow [2024-06-27 19:18:08,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:18:08,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:18:08,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-27 19:18:08,107 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5964285714285714 [2024-06-27 19:18:08,107 INFO L175 Difference]: Start difference. First operand has 98 places, 140 transitions, 1651 flow. Second operand 7 states and 167 transitions. [2024-06-27 19:18:08,107 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 180 transitions, 2263 flow [2024-06-27 19:18:08,140 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 180 transitions, 2081 flow, removed 36 selfloop flow, removed 5 redundant places. [2024-06-27 19:18:08,143 INFO L231 Difference]: Finished difference. Result has 103 places, 157 transitions, 1843 flow [2024-06-27 19:18:08,143 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1501, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1843, PETRI_PLACES=103, PETRI_TRANSITIONS=157} [2024-06-27 19:18:08,144 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 62 predicate places. [2024-06-27 19:18:08,144 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 157 transitions, 1843 flow [2024-06-27 19:18:08,144 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 19:18:08,144 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:18:08,145 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:18:08,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-27 19:18:08,145 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:18:08,145 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:18:08,145 INFO L85 PathProgramCache]: Analyzing trace with hash -2003529296, now seen corresponding path program 1 times [2024-06-27 19:18:08,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:18:08,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958573318] [2024-06-27 19:18:08,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:18:08,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:18:08,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:18:08,225 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 19:18:08,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:18:08,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958573318] [2024-06-27 19:18:08,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958573318] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:18:08,226 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:18:08,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 19:18:08,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937563894] [2024-06-27 19:18:08,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:18:08,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 19:18:08,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:18:08,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 19:18:08,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-27 19:18:08,244 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-27 19:18:08,245 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 157 transitions, 1843 flow. Second operand has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:08,245 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:18:08,245 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-27 19:18:08,245 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:18:08,477 INFO L124 PetriNetUnfolderBase]: 1115/1865 cut-off events. [2024-06-27 19:18:08,478 INFO L125 PetriNetUnfolderBase]: For 17546/17551 co-relation queries the response was YES. [2024-06-27 19:18:08,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10789 conditions, 1865 events. 1115/1865 cut-off events. For 17546/17551 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 9936 event pairs, 306 based on Foata normal form. 8/1867 useless extension candidates. Maximal degree in co-relation 10740. Up to 1554 conditions per place. [2024-06-27 19:18:08,491 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 128 selfloop transitions, 16 changer transitions 0/166 dead transitions. [2024-06-27 19:18:08,491 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 166 transitions, 2165 flow [2024-06-27 19:18:08,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 19:18:08,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 19:18:08,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 100 transitions. [2024-06-27 19:18:08,492 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-27 19:18:08,492 INFO L175 Difference]: Start difference. First operand has 103 places, 157 transitions, 1843 flow. Second operand 4 states and 100 transitions. [2024-06-27 19:18:08,492 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 166 transitions, 2165 flow [2024-06-27 19:18:08,522 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 166 transitions, 2087 flow, removed 37 selfloop flow, removed 1 redundant places. [2024-06-27 19:18:08,526 INFO L231 Difference]: Finished difference. Result has 106 places, 157 transitions, 1807 flow [2024-06-27 19:18:08,526 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1765, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1807, PETRI_PLACES=106, PETRI_TRANSITIONS=157} [2024-06-27 19:18:08,527 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 65 predicate places. [2024-06-27 19:18:08,527 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 157 transitions, 1807 flow [2024-06-27 19:18:08,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:08,527 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:18:08,527 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:18:08,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-27 19:18:08,528 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 19:18:08,528 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:18:08,528 INFO L85 PathProgramCache]: Analyzing trace with hash -1546136027, now seen corresponding path program 1 times [2024-06-27 19:18:08,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:18:08,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503607870] [2024-06-27 19:18:08,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:18:08,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:18:08,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:18:08,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:18:08,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:18:08,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503607870] [2024-06-27 19:18:08,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503607870] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:18:08,638 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:18:08,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:18:08,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927479399] [2024-06-27 19:18:08,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:18:08,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:18:08,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:18:08,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:18:08,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:18:08,677 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-27 19:18:08,678 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 157 transitions, 1807 flow. Second operand has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:08,678 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:18:08,678 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-27 19:18:08,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:18:08,915 INFO L124 PetriNetUnfolderBase]: 1177/1946 cut-off events. [2024-06-27 19:18:08,915 INFO L125 PetriNetUnfolderBase]: For 20993/21065 co-relation queries the response was YES. [2024-06-27 19:18:08,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11468 conditions, 1946 events. 1177/1946 cut-off events. For 20993/21065 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 10326 event pairs, 185 based on Foata normal form. 13/1909 useless extension candidates. Maximal degree in co-relation 11416. Up to 1537 conditions per place. [2024-06-27 19:18:08,930 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 128 selfloop transitions, 33 changer transitions 0/186 dead transitions. [2024-06-27 19:18:08,930 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 186 transitions, 2319 flow [2024-06-27 19:18:08,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:18:08,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:18:08,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 152 transitions. [2024-06-27 19:18:08,932 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6333333333333333 [2024-06-27 19:18:08,932 INFO L175 Difference]: Start difference. First operand has 106 places, 157 transitions, 1807 flow. Second operand 6 states and 152 transitions. [2024-06-27 19:18:08,932 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 186 transitions, 2319 flow [2024-06-27 19:18:08,968 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 186 transitions, 2287 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-27 19:18:08,972 INFO L231 Difference]: Finished difference. Result has 109 places, 161 transitions, 1908 flow [2024-06-27 19:18:08,972 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1775, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1908, PETRI_PLACES=109, PETRI_TRANSITIONS=161} [2024-06-27 19:18:08,973 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 68 predicate places. [2024-06-27 19:18:08,973 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 161 transitions, 1908 flow [2024-06-27 19:18:08,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:08,974 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:18:08,974 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:18:08,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-27 19:18:08,974 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 19:18:08,974 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:18:08,974 INFO L85 PathProgramCache]: Analyzing trace with hash 172091409, now seen corresponding path program 2 times [2024-06-27 19:18:08,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:18:08,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739992535] [2024-06-27 19:18:08,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:18:08,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:18:08,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:18:09,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:18:09,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:18:09,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739992535] [2024-06-27 19:18:09,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739992535] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:18:09,116 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:18:09,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:18:09,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625224236] [2024-06-27 19:18:09,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:18:09,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:18:09,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:18:09,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:18:09,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:18:09,149 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-27 19:18:09,150 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 161 transitions, 1908 flow. Second operand has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:09,150 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:18:09,150 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-27 19:18:09,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:18:09,373 INFO L124 PetriNetUnfolderBase]: 1164/1931 cut-off events. [2024-06-27 19:18:09,373 INFO L125 PetriNetUnfolderBase]: For 23057/23136 co-relation queries the response was YES. [2024-06-27 19:18:09,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11675 conditions, 1931 events. 1164/1931 cut-off events. For 23057/23136 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 10223 event pairs, 252 based on Foata normal form. 11/1891 useless extension candidates. Maximal degree in co-relation 11622. Up to 1585 conditions per place. [2024-06-27 19:18:09,388 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 125 selfloop transitions, 29 changer transitions 0/179 dead transitions. [2024-06-27 19:18:09,388 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 179 transitions, 2284 flow [2024-06-27 19:18:09,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:18:09,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:18:09,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 127 transitions. [2024-06-27 19:18:09,389 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.635 [2024-06-27 19:18:09,389 INFO L175 Difference]: Start difference. First operand has 109 places, 161 transitions, 1908 flow. Second operand 5 states and 127 transitions. [2024-06-27 19:18:09,389 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 179 transitions, 2284 flow [2024-06-27 19:18:09,431 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 179 transitions, 2218 flow, removed 17 selfloop flow, removed 2 redundant places. [2024-06-27 19:18:09,434 INFO L231 Difference]: Finished difference. Result has 112 places, 161 transitions, 1909 flow [2024-06-27 19:18:09,434 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1842, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1909, PETRI_PLACES=112, PETRI_TRANSITIONS=161} [2024-06-27 19:18:09,434 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 71 predicate places. [2024-06-27 19:18:09,435 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 161 transitions, 1909 flow [2024-06-27 19:18:09,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:09,436 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:18:09,436 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:18:09,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-27 19:18:09,437 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:18:09,438 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:18:09,438 INFO L85 PathProgramCache]: Analyzing trace with hash -572086597, now seen corresponding path program 3 times [2024-06-27 19:18:09,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:18:09,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475409146] [2024-06-27 19:18:09,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:18:09,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:18:09,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:18:09,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:18:09,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:18:09,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475409146] [2024-06-27 19:18:09,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475409146] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:18:09,541 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:18:09,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:18:09,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327324502] [2024-06-27 19:18:09,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:18:09,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:18:09,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:18:09,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:18:09,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:18:09,575 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-27 19:18:09,575 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 161 transitions, 1909 flow. Second operand has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:09,575 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:18:09,575 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-27 19:18:09,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:18:09,825 INFO L124 PetriNetUnfolderBase]: 1151/1912 cut-off events. [2024-06-27 19:18:09,825 INFO L125 PetriNetUnfolderBase]: For 23943/24010 co-relation queries the response was YES. [2024-06-27 19:18:09,832 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11593 conditions, 1912 events. 1151/1912 cut-off events. For 23943/24010 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 10137 event pairs, 247 based on Foata normal form. 7/1869 useless extension candidates. Maximal degree in co-relation 11538. Up to 1552 conditions per place. [2024-06-27 19:18:09,842 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 126 selfloop transitions, 34 changer transitions 0/185 dead transitions. [2024-06-27 19:18:09,842 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 185 transitions, 2339 flow [2024-06-27 19:18:09,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:18:09,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:18:09,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-27 19:18:09,844 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6208333333333333 [2024-06-27 19:18:09,844 INFO L175 Difference]: Start difference. First operand has 112 places, 161 transitions, 1909 flow. Second operand 6 states and 149 transitions. [2024-06-27 19:18:09,844 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 185 transitions, 2339 flow [2024-06-27 19:18:09,891 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 185 transitions, 2275 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-06-27 19:18:09,894 INFO L231 Difference]: Finished difference. Result has 114 places, 163 transitions, 1957 flow [2024-06-27 19:18:09,894 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1845, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1957, PETRI_PLACES=114, PETRI_TRANSITIONS=163} [2024-06-27 19:18:09,894 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 73 predicate places. [2024-06-27 19:18:09,894 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 163 transitions, 1957 flow [2024-06-27 19:18:09,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:09,895 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:18:09,895 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:18:09,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-27 19:18:09,895 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 19:18:09,896 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:18:09,896 INFO L85 PathProgramCache]: Analyzing trace with hash -1427803199, now seen corresponding path program 1 times [2024-06-27 19:18:09,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:18:09,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120267687] [2024-06-27 19:18:09,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:18:09,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:18:09,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:18:10,007 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:18:10,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:18:10,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120267687] [2024-06-27 19:18:10,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120267687] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:18:10,007 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:18:10,008 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:18:10,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007106054] [2024-06-27 19:18:10,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:18:10,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:18:10,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:18:10,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:18:10,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:18:10,077 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:18:10,077 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 163 transitions, 1957 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 19:18:10,078 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:18:10,078 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:18:10,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:18:10,361 INFO L124 PetriNetUnfolderBase]: 1318/2170 cut-off events. [2024-06-27 19:18:10,361 INFO L125 PetriNetUnfolderBase]: For 28300/28307 co-relation queries the response was YES. [2024-06-27 19:18:10,368 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12908 conditions, 2170 events. 1318/2170 cut-off events. For 28300/28307 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 11548 event pairs, 261 based on Foata normal form. 30/2197 useless extension candidates. Maximal degree in co-relation 12852. Up to 1659 conditions per place. [2024-06-27 19:18:10,378 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 132 selfloop transitions, 56 changer transitions 0/195 dead transitions. [2024-06-27 19:18:10,379 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 195 transitions, 2527 flow [2024-06-27 19:18:10,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:18:10,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:18:10,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-06-27 19:18:10,380 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-27 19:18:10,380 INFO L175 Difference]: Start difference. First operand has 114 places, 163 transitions, 1957 flow. Second operand 8 states and 192 transitions. [2024-06-27 19:18:10,380 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 195 transitions, 2527 flow [2024-06-27 19:18:10,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 195 transitions, 2441 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-27 19:18:10,432 INFO L231 Difference]: Finished difference. Result has 118 places, 167 transitions, 2066 flow [2024-06-27 19:18:10,432 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1871, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2066, PETRI_PLACES=118, PETRI_TRANSITIONS=167} [2024-06-27 19:18:10,432 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 77 predicate places. [2024-06-27 19:18:10,433 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 167 transitions, 2066 flow [2024-06-27 19:18:10,433 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 19:18:10,433 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:18:10,433 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:18:10,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-27 19:18:10,433 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 19:18:10,434 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:18:10,434 INFO L85 PathProgramCache]: Analyzing trace with hash 1069420051, now seen corresponding path program 2 times [2024-06-27 19:18:10,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:18:10,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775225145] [2024-06-27 19:18:10,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:18:10,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:18:10,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:18:10,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:18:10,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:18:10,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775225145] [2024-06-27 19:18:10,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775225145] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:18:10,533 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:18:10,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:18:10,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201488723] [2024-06-27 19:18:10,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:18:10,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:18:10,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:18:10,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:18:10,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:18:10,564 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:18:10,564 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 167 transitions, 2066 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 19:18:10,565 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:18:10,565 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:18:10,565 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:18:10,821 INFO L124 PetriNetUnfolderBase]: 1335/2193 cut-off events. [2024-06-27 19:18:10,822 INFO L125 PetriNetUnfolderBase]: For 28568/28575 co-relation queries the response was YES. [2024-06-27 19:18:10,829 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13576 conditions, 2193 events. 1335/2193 cut-off events. For 28568/28575 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 11639 event pairs, 291 based on Foata normal form. 10/2200 useless extension candidates. Maximal degree in co-relation 13519. Up to 1912 conditions per place. [2024-06-27 19:18:10,838 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 158 selfloop transitions, 28 changer transitions 0/193 dead transitions. [2024-06-27 19:18:10,839 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 193 transitions, 2526 flow [2024-06-27 19:18:10,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:18:10,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:18:10,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 164 transitions. [2024-06-27 19:18:10,843 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5857142857142857 [2024-06-27 19:18:10,843 INFO L175 Difference]: Start difference. First operand has 118 places, 167 transitions, 2066 flow. Second operand 7 states and 164 transitions. [2024-06-27 19:18:10,843 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 193 transitions, 2526 flow [2024-06-27 19:18:10,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 193 transitions, 2387 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-27 19:18:10,902 INFO L231 Difference]: Finished difference. Result has 119 places, 169 transitions, 2022 flow [2024-06-27 19:18:10,902 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1927, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2022, PETRI_PLACES=119, PETRI_TRANSITIONS=169} [2024-06-27 19:18:10,903 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 78 predicate places. [2024-06-27 19:18:10,903 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 169 transitions, 2022 flow [2024-06-27 19:18:10,903 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 19:18:10,903 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:18:10,903 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:18:10,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-27 19:18:10,904 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 19:18:10,904 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:18:10,904 INFO L85 PathProgramCache]: Analyzing trace with hash 1077990931, now seen corresponding path program 3 times [2024-06-27 19:18:10,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:18:10,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060670027] [2024-06-27 19:18:10,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:18:10,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:18:10,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:18:10,995 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:18:10,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:18:10,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060670027] [2024-06-27 19:18:10,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060670027] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:18:10,996 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:18:10,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:18:10,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553001612] [2024-06-27 19:18:10,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:18:10,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:18:10,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:18:10,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:18:10,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:18:11,032 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:18:11,033 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 169 transitions, 2022 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 19:18:11,033 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:18:11,033 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:18:11,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:18:11,289 INFO L124 PetriNetUnfolderBase]: 1327/2185 cut-off events. [2024-06-27 19:18:11,289 INFO L125 PetriNetUnfolderBase]: For 29128/29135 co-relation queries the response was YES. [2024-06-27 19:18:11,297 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13288 conditions, 2185 events. 1327/2185 cut-off events. For 29128/29135 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 11612 event pairs, 260 based on Foata normal form. 10/2192 useless extension candidates. Maximal degree in co-relation 13230. Up to 1836 conditions per place. [2024-06-27 19:18:11,339 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 157 selfloop transitions, 33 changer transitions 0/197 dead transitions. [2024-06-27 19:18:11,340 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 197 transitions, 2504 flow [2024-06-27 19:18:11,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:18:11,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:18:11,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 165 transitions. [2024-06-27 19:18:11,341 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5892857142857143 [2024-06-27 19:18:11,341 INFO L175 Difference]: Start difference. First operand has 119 places, 169 transitions, 2022 flow. Second operand 7 states and 165 transitions. [2024-06-27 19:18:11,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 197 transitions, 2504 flow [2024-06-27 19:18:11,385 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 197 transitions, 2427 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-27 19:18:11,388 INFO L231 Difference]: Finished difference. Result has 122 places, 172 transitions, 2074 flow [2024-06-27 19:18:11,388 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1945, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2074, PETRI_PLACES=122, PETRI_TRANSITIONS=172} [2024-06-27 19:18:11,388 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 81 predicate places. [2024-06-27 19:18:11,388 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 172 transitions, 2074 flow [2024-06-27 19:18:11,389 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 19:18:11,389 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:18:11,389 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:18:11,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-27 19:18:11,389 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:18:11,389 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:18:11,389 INFO L85 PathProgramCache]: Analyzing trace with hash -685575289, now seen corresponding path program 1 times [2024-06-27 19:18:11,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:18:11,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458115505] [2024-06-27 19:18:11,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:18:11,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:18:11,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:18:11,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:18:11,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:18:11,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458115505] [2024-06-27 19:18:11,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458115505] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:18:11,513 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:18:11,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:18:11,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108707566] [2024-06-27 19:18:11,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:18:11,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:18:11,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:18:11,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:18:11,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:18:11,561 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:18:11,561 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 172 transitions, 2074 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:11,561 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:18:11,561 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:18:11,561 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:18:12,084 INFO L124 PetriNetUnfolderBase]: 2300/3837 cut-off events. [2024-06-27 19:18:12,084 INFO L125 PetriNetUnfolderBase]: For 69604/69608 co-relation queries the response was YES. [2024-06-27 19:18:12,097 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22709 conditions, 3837 events. 2300/3837 cut-off events. For 69604/69608 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 23557 event pairs, 355 based on Foata normal form. 55/3887 useless extension candidates. Maximal degree in co-relation 22649. Up to 1837 conditions per place. [2024-06-27 19:18:12,113 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 171 selfloop transitions, 68 changer transitions 0/246 dead transitions. [2024-06-27 19:18:12,113 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 246 transitions, 3243 flow [2024-06-27 19:18:12,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:18:12,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:18:12,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 217 transitions. [2024-06-27 19:18:12,116 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.678125 [2024-06-27 19:18:12,116 INFO L175 Difference]: Start difference. First operand has 122 places, 172 transitions, 2074 flow. Second operand 8 states and 217 transitions. [2024-06-27 19:18:12,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 246 transitions, 3243 flow [2024-06-27 19:18:12,188 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 246 transitions, 3152 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-27 19:18:12,191 INFO L231 Difference]: Finished difference. Result has 128 places, 191 transitions, 2464 flow [2024-06-27 19:18:12,192 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1989, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2464, PETRI_PLACES=128, PETRI_TRANSITIONS=191} [2024-06-27 19:18:12,192 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 87 predicate places. [2024-06-27 19:18:12,192 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 191 transitions, 2464 flow [2024-06-27 19:18:12,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:12,194 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:18:12,194 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:18:12,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-27 19:18:12,194 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 19:18:12,194 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:18:12,195 INFO L85 PathProgramCache]: Analyzing trace with hash -767542705, now seen corresponding path program 2 times [2024-06-27 19:18:12,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:18:12,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097003888] [2024-06-27 19:18:12,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:18:12,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:18:12,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:18:12,317 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:18:12,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:18:12,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097003888] [2024-06-27 19:18:12,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097003888] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:18:12,318 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:18:12,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:18:12,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283114606] [2024-06-27 19:18:12,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:18:12,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:18:12,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:18:12,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:18:12,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:18:12,362 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:18:12,362 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 191 transitions, 2464 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:12,362 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:18:12,362 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:18:12,363 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:18:12,915 INFO L124 PetriNetUnfolderBase]: 2449/4118 cut-off events. [2024-06-27 19:18:12,915 INFO L125 PetriNetUnfolderBase]: For 78434/78438 co-relation queries the response was YES. [2024-06-27 19:18:12,929 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25017 conditions, 4118 events. 2449/4118 cut-off events. For 78434/78438 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 25818 event pairs, 706 based on Foata normal form. 51/4162 useless extension candidates. Maximal degree in co-relation 24954. Up to 3206 conditions per place. [2024-06-27 19:18:12,946 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 150 selfloop transitions, 66 changer transitions 0/223 dead transitions. [2024-06-27 19:18:12,946 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 223 transitions, 3103 flow [2024-06-27 19:18:12,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:18:12,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:18:12,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-06-27 19:18:12,948 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6428571428571429 [2024-06-27 19:18:12,948 INFO L175 Difference]: Start difference. First operand has 128 places, 191 transitions, 2464 flow. Second operand 7 states and 180 transitions. [2024-06-27 19:18:12,948 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 223 transitions, 3103 flow [2024-06-27 19:18:13,067 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 223 transitions, 2936 flow, removed 55 selfloop flow, removed 3 redundant places. [2024-06-27 19:18:13,070 INFO L231 Difference]: Finished difference. Result has 132 places, 194 transitions, 2514 flow [2024-06-27 19:18:13,070 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2303, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2514, PETRI_PLACES=132, PETRI_TRANSITIONS=194} [2024-06-27 19:18:13,071 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 91 predicate places. [2024-06-27 19:18:13,071 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 194 transitions, 2514 flow [2024-06-27 19:18:13,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:13,071 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:18:13,071 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:18:13,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-27 19:18:13,072 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 19:18:13,072 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:18:13,072 INFO L85 PathProgramCache]: Analyzing trace with hash 1039867675, now seen corresponding path program 3 times [2024-06-27 19:18:13,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:18:13,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008273442] [2024-06-27 19:18:13,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:18:13,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:18:13,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:18:13,185 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:18:13,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:18:13,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008273442] [2024-06-27 19:18:13,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008273442] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:18:13,185 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:18:13,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:18:13,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570175974] [2024-06-27 19:18:13,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:18:13,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:18:13,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:18:13,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:18:13,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:18:13,241 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:18:13,241 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 194 transitions, 2514 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:13,241 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:18:13,242 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:18:13,242 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:18:13,874 INFO L124 PetriNetUnfolderBase]: 2560/4329 cut-off events. [2024-06-27 19:18:13,875 INFO L125 PetriNetUnfolderBase]: For 80929/80933 co-relation queries the response was YES. [2024-06-27 19:18:13,893 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25401 conditions, 4329 events. 2560/4329 cut-off events. For 80929/80933 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 27716 event pairs, 642 based on Foata normal form. 55/4379 useless extension candidates. Maximal degree in co-relation 25336. Up to 2608 conditions per place. [2024-06-27 19:18:13,912 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 169 selfloop transitions, 64 changer transitions 0/240 dead transitions. [2024-06-27 19:18:13,912 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 240 transitions, 3378 flow [2024-06-27 19:18:13,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:18:13,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:18:13,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 185 transitions. [2024-06-27 19:18:13,913 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6607142857142857 [2024-06-27 19:18:13,913 INFO L175 Difference]: Start difference. First operand has 132 places, 194 transitions, 2514 flow. Second operand 7 states and 185 transitions. [2024-06-27 19:18:13,913 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 240 transitions, 3378 flow [2024-06-27 19:18:14,040 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 240 transitions, 3270 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-27 19:18:14,043 INFO L231 Difference]: Finished difference. Result has 136 places, 203 transitions, 2742 flow [2024-06-27 19:18:14,043 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2406, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2742, PETRI_PLACES=136, PETRI_TRANSITIONS=203} [2024-06-27 19:18:14,043 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 95 predicate places. [2024-06-27 19:18:14,043 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 203 transitions, 2742 flow [2024-06-27 19:18:14,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:14,044 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:18:14,044 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:18:14,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-27 19:18:14,044 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 19:18:14,045 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:18:14,045 INFO L85 PathProgramCache]: Analyzing trace with hash -554666161, now seen corresponding path program 4 times [2024-06-27 19:18:14,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:18:14,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844804984] [2024-06-27 19:18:14,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:18:14,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:18:14,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:18:14,159 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:18:14,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:18:14,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844804984] [2024-06-27 19:18:14,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844804984] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:18:14,160 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:18:14,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:18:14,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191593377] [2024-06-27 19:18:14,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:18:14,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:18:14,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:18:14,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:18:14,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:18:14,199 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:18:14,200 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 203 transitions, 2742 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:14,200 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:18:14,200 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:18:14,200 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:18:14,883 INFO L124 PetriNetUnfolderBase]: 2747/4658 cut-off events. [2024-06-27 19:18:14,883 INFO L125 PetriNetUnfolderBase]: For 90599/90603 co-relation queries the response was YES. [2024-06-27 19:18:14,898 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27492 conditions, 4658 events. 2747/4658 cut-off events. For 90599/90603 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 30383 event pairs, 899 based on Foata normal form. 51/4704 useless extension candidates. Maximal degree in co-relation 27425. Up to 3698 conditions per place. [2024-06-27 19:18:14,912 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 142 selfloop transitions, 97 changer transitions 0/246 dead transitions. [2024-06-27 19:18:14,912 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 246 transitions, 3500 flow [2024-06-27 19:18:14,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:18:14,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:18:14,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 247 transitions. [2024-06-27 19:18:14,913 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6175 [2024-06-27 19:18:14,913 INFO L175 Difference]: Start difference. First operand has 136 places, 203 transitions, 2742 flow. Second operand 10 states and 247 transitions. [2024-06-27 19:18:14,913 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 246 transitions, 3500 flow [2024-06-27 19:18:15,050 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 246 transitions, 3377 flow, removed 33 selfloop flow, removed 3 redundant places. [2024-06-27 19:18:15,054 INFO L231 Difference]: Finished difference. Result has 143 places, 205 transitions, 2882 flow [2024-06-27 19:18:15,054 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2619, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2882, PETRI_PLACES=143, PETRI_TRANSITIONS=205} [2024-06-27 19:18:15,054 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 102 predicate places. [2024-06-27 19:18:15,054 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 205 transitions, 2882 flow [2024-06-27 19:18:15,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:15,055 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:18:15,055 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:18:15,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-27 19:18:15,055 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:18:15,055 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:18:15,055 INFO L85 PathProgramCache]: Analyzing trace with hash -549303781, now seen corresponding path program 5 times [2024-06-27 19:18:15,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:18:15,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131525433] [2024-06-27 19:18:15,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:18:15,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:18:15,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:18:15,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:18:15,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:18:15,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131525433] [2024-06-27 19:18:15,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131525433] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:18:15,155 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:18:15,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:18:15,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40678121] [2024-06-27 19:18:15,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:18:15,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:18:15,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:18:15,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:18:15,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:18:15,203 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:18:15,204 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 205 transitions, 2882 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:15,204 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:18:15,204 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:18:15,204 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:18:15,780 INFO L124 PetriNetUnfolderBase]: 2934/4990 cut-off events. [2024-06-27 19:18:15,780 INFO L125 PetriNetUnfolderBase]: For 98580/98584 co-relation queries the response was YES. [2024-06-27 19:18:15,802 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29195 conditions, 4990 events. 2934/4990 cut-off events. For 98580/98584 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 33192 event pairs, 973 based on Foata normal form. 51/5036 useless extension candidates. Maximal degree in co-relation 29126. Up to 4019 conditions per place. [2024-06-27 19:18:15,819 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 134 selfloop transitions, 100 changer transitions 0/241 dead transitions. [2024-06-27 19:18:15,819 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 241 transitions, 3620 flow [2024-06-27 19:18:15,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:18:15,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:18:15,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 221 transitions. [2024-06-27 19:18:15,820 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6138888888888889 [2024-06-27 19:18:15,820 INFO L175 Difference]: Start difference. First operand has 143 places, 205 transitions, 2882 flow. Second operand 9 states and 221 transitions. [2024-06-27 19:18:15,820 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 241 transitions, 3620 flow [2024-06-27 19:18:15,982 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 241 transitions, 3383 flow, removed 25 selfloop flow, removed 8 redundant places. [2024-06-27 19:18:15,985 INFO L231 Difference]: Finished difference. Result has 144 places, 207 transitions, 2918 flow [2024-06-27 19:18:15,985 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2645, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2918, PETRI_PLACES=144, PETRI_TRANSITIONS=207} [2024-06-27 19:18:15,986 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 103 predicate places. [2024-06-27 19:18:15,986 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 207 transitions, 2918 flow [2024-06-27 19:18:15,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:15,986 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:18:15,986 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:18:15,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-27 19:18:15,987 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:18:15,987 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:18:15,987 INFO L85 PathProgramCache]: Analyzing trace with hash -554814031, now seen corresponding path program 6 times [2024-06-27 19:18:15,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:18:15,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020899931] [2024-06-27 19:18:15,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:18:15,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:18:15,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:18:16,093 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 19:18:16,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:18:16,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020899931] [2024-06-27 19:18:16,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020899931] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:18:16,094 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:18:16,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:18:16,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017521099] [2024-06-27 19:18:16,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:18:16,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:18:16,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:18:16,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:18:16,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:18:16,143 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:18:16,144 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 207 transitions, 2918 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:16,144 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:18:16,144 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:18:16,144 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:18:16,805 INFO L124 PetriNetUnfolderBase]: 3266/5581 cut-off events. [2024-06-27 19:18:16,805 INFO L125 PetriNetUnfolderBase]: For 113600/113604 co-relation queries the response was YES. [2024-06-27 19:18:16,831 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32390 conditions, 5581 events. 3266/5581 cut-off events. For 113600/113604 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 38320 event pairs, 1050 based on Foata normal form. 43/5619 useless extension candidates. Maximal degree in co-relation 32320. Up to 3642 conditions per place. [2024-06-27 19:18:16,850 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 154 selfloop transitions, 100 changer transitions 0/261 dead transitions. [2024-06-27 19:18:16,850 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 261 transitions, 3872 flow [2024-06-27 19:18:16,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:18:16,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:18:16,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 252 transitions. [2024-06-27 19:18:16,851 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.63 [2024-06-27 19:18:16,851 INFO L175 Difference]: Start difference. First operand has 144 places, 207 transitions, 2918 flow. Second operand 10 states and 252 transitions. [2024-06-27 19:18:16,851 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 261 transitions, 3872 flow [2024-06-27 19:18:17,032 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 261 transitions, 3633 flow, removed 23 selfloop flow, removed 7 redundant places. [2024-06-27 19:18:17,035 INFO L231 Difference]: Finished difference. Result has 148 places, 212 transitions, 3034 flow [2024-06-27 19:18:17,035 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2679, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3034, PETRI_PLACES=148, PETRI_TRANSITIONS=212} [2024-06-27 19:18:17,036 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 107 predicate places. [2024-06-27 19:18:17,036 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 212 transitions, 3034 flow [2024-06-27 19:18:17,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:17,036 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:18:17,036 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:18:17,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-27 19:18:17,037 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:18:17,037 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:18:17,037 INFO L85 PathProgramCache]: Analyzing trace with hash -549088579, now seen corresponding path program 1 times [2024-06-27 19:18:17,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:18:17,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876038795] [2024-06-27 19:18:17,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:18:17,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:18:17,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:18:17,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:18:17,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:18:17,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876038795] [2024-06-27 19:18:17,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876038795] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:18:17,133 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:18:17,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:18:17,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875638943] [2024-06-27 19:18:17,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:18:17,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:18:17,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:18:17,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:18:17,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:18:17,200 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:18:17,201 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 212 transitions, 3034 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:17,201 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:18:17,201 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:18:17,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:18:18,001 INFO L124 PetriNetUnfolderBase]: 3590/6168 cut-off events. [2024-06-27 19:18:18,001 INFO L125 PetriNetUnfolderBase]: For 136274/136278 co-relation queries the response was YES. [2024-06-27 19:18:18,034 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35971 conditions, 6168 events. 3590/6168 cut-off events. For 136274/136278 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 43547 event pairs, 1122 based on Foata normal form. 43/6202 useless extension candidates. Maximal degree in co-relation 35899. Up to 3650 conditions per place. [2024-06-27 19:18:18,055 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 134 selfloop transitions, 115 changer transitions 0/256 dead transitions. [2024-06-27 19:18:18,055 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 256 transitions, 3940 flow [2024-06-27 19:18:18,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:18:18,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:18:18,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 227 transitions. [2024-06-27 19:18:18,057 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6305555555555555 [2024-06-27 19:18:18,057 INFO L175 Difference]: Start difference. First operand has 148 places, 212 transitions, 3034 flow. Second operand 9 states and 227 transitions. [2024-06-27 19:18:18,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 256 transitions, 3940 flow [2024-06-27 19:18:18,286 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 256 transitions, 3685 flow, removed 39 selfloop flow, removed 7 redundant places. [2024-06-27 19:18:18,290 INFO L231 Difference]: Finished difference. Result has 150 places, 215 transitions, 3123 flow [2024-06-27 19:18:18,290 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2781, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3123, PETRI_PLACES=150, PETRI_TRANSITIONS=215} [2024-06-27 19:18:18,291 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 109 predicate places. [2024-06-27 19:18:18,291 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 215 transitions, 3123 flow [2024-06-27 19:18:18,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:18,291 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:18:18,291 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:18:18,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-27 19:18:18,291 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 19:18:18,292 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:18:18,292 INFO L85 PathProgramCache]: Analyzing trace with hash -1207930883, now seen corresponding path program 7 times [2024-06-27 19:18:18,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:18:18,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935606131] [2024-06-27 19:18:18,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:18:18,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:18:18,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:18:18,384 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:18:18,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:18:18,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935606131] [2024-06-27 19:18:18,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935606131] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:18:18,384 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:18:18,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:18:18,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525608804] [2024-06-27 19:18:18,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:18:18,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:18:18,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:18:18,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:18:18,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:18:18,450 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:18:18,450 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 215 transitions, 3123 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:18,450 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:18:18,450 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:18:18,450 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:18:19,210 INFO L124 PetriNetUnfolderBase]: 3623/6228 cut-off events. [2024-06-27 19:18:19,210 INFO L125 PetriNetUnfolderBase]: For 134570/134574 co-relation queries the response was YES. [2024-06-27 19:18:19,240 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36467 conditions, 6228 events. 3623/6228 cut-off events. For 134570/134574 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 44141 event pairs, 1374 based on Foata normal form. 17/6240 useless extension candidates. Maximal degree in co-relation 36394. Up to 5567 conditions per place. [2024-06-27 19:18:19,262 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 197 selfloop transitions, 43 changer transitions 0/247 dead transitions. [2024-06-27 19:18:19,262 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 247 transitions, 3731 flow [2024-06-27 19:18:19,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:18:19,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:18:19,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 190 transitions. [2024-06-27 19:18:19,264 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.59375 [2024-06-27 19:18:19,264 INFO L175 Difference]: Start difference. First operand has 150 places, 215 transitions, 3123 flow. Second operand 8 states and 190 transitions. [2024-06-27 19:18:19,264 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 247 transitions, 3731 flow [2024-06-27 19:18:19,546 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 247 transitions, 3548 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-06-27 19:18:19,549 INFO L231 Difference]: Finished difference. Result has 153 places, 216 transitions, 3067 flow [2024-06-27 19:18:19,549 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2940, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3067, PETRI_PLACES=153, PETRI_TRANSITIONS=216} [2024-06-27 19:18:19,550 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 112 predicate places. [2024-06-27 19:18:19,550 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 216 transitions, 3067 flow [2024-06-27 19:18:19,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:19,550 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:18:19,550 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:18:19,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-27 19:18:19,551 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 19:18:19,551 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:18:19,551 INFO L85 PathProgramCache]: Analyzing trace with hash -1207715681, now seen corresponding path program 2 times [2024-06-27 19:18:19,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:18:19,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502497092] [2024-06-27 19:18:19,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:18:19,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:18:19,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:18:19,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:18:19,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:18:19,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502497092] [2024-06-27 19:18:19,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502497092] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:18:19,661 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:18:19,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:18:19,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266550241] [2024-06-27 19:18:19,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:18:19,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:18:19,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:18:19,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:18:19,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:18:19,725 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:18:19,725 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 216 transitions, 3067 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:19,725 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:18:19,725 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:18:19,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:18:20,466 INFO L124 PetriNetUnfolderBase]: 3664/6305 cut-off events. [2024-06-27 19:18:20,467 INFO L125 PetriNetUnfolderBase]: For 138660/138664 co-relation queries the response was YES. [2024-06-27 19:18:20,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36895 conditions, 6305 events. 3664/6305 cut-off events. For 138660/138664 co-relation queries the response was YES. Maximal size of possible extension queue 384. Compared 44847 event pairs, 1374 based on Foata normal form. 13/6313 useless extension candidates. Maximal degree in co-relation 36820. Up to 5551 conditions per place. [2024-06-27 19:18:20,519 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 199 selfloop transitions, 45 changer transitions 0/251 dead transitions. [2024-06-27 19:18:20,519 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 251 transitions, 3701 flow [2024-06-27 19:18:20,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:18:20,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:18:20,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 193 transitions. [2024-06-27 19:18:20,521 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.603125 [2024-06-27 19:18:20,521 INFO L175 Difference]: Start difference. First operand has 153 places, 216 transitions, 3067 flow. Second operand 8 states and 193 transitions. [2024-06-27 19:18:20,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 251 transitions, 3701 flow [2024-06-27 19:18:20,786 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 251 transitions, 3588 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-27 19:18:20,789 INFO L231 Difference]: Finished difference. Result has 155 places, 217 transitions, 3086 flow [2024-06-27 19:18:20,790 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2954, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3086, PETRI_PLACES=155, PETRI_TRANSITIONS=217} [2024-06-27 19:18:20,790 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 114 predicate places. [2024-06-27 19:18:20,790 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 217 transitions, 3086 flow [2024-06-27 19:18:20,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:20,791 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:18:20,791 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:18:20,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-27 19:18:20,791 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:18:20,791 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:18:20,791 INFO L85 PathProgramCache]: Analyzing trace with hash -942018401, now seen corresponding path program 3 times [2024-06-27 19:18:20,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:18:20,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048111858] [2024-06-27 19:18:20,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:18:20,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:18:20,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:18:20,876 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:18:20,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:18:20,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048111858] [2024-06-27 19:18:20,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048111858] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:18:20,877 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:18:20,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:18:20,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311015893] [2024-06-27 19:18:20,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:18:20,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:18:20,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:18:20,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:18:20,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:18:20,927 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:18:20,927 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 217 transitions, 3086 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:20,927 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:18:20,928 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:18:20,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:18:21,634 INFO L124 PetriNetUnfolderBase]: 3644/6273 cut-off events. [2024-06-27 19:18:21,634 INFO L125 PetriNetUnfolderBase]: For 141815/141819 co-relation queries the response was YES. [2024-06-27 19:18:21,667 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36479 conditions, 6273 events. 3644/6273 cut-off events. For 141815/141819 co-relation queries the response was YES. Maximal size of possible extension queue 381. Compared 44254 event pairs, 1314 based on Foata normal form. 13/6281 useless extension candidates. Maximal degree in co-relation 36403. Up to 5018 conditions per place. [2024-06-27 19:18:21,690 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 190 selfloop transitions, 54 changer transitions 0/251 dead transitions. [2024-06-27 19:18:21,690 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 251 transitions, 3632 flow [2024-06-27 19:18:21,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:18:21,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:18:21,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-06-27 19:18:21,691 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-27 19:18:21,691 INFO L175 Difference]: Start difference. First operand has 155 places, 217 transitions, 3086 flow. Second operand 8 states and 192 transitions. [2024-06-27 19:18:21,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 251 transitions, 3632 flow [2024-06-27 19:18:21,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 251 transitions, 3512 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-27 19:18:21,918 INFO L231 Difference]: Finished difference. Result has 156 places, 216 transitions, 3022 flow [2024-06-27 19:18:21,918 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2910, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3022, PETRI_PLACES=156, PETRI_TRANSITIONS=216} [2024-06-27 19:18:21,918 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 115 predicate places. [2024-06-27 19:18:21,919 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 216 transitions, 3022 flow [2024-06-27 19:18:21,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:21,919 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:18:21,919 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:18:21,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-27 19:18:21,919 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:18:21,919 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:18:21,920 INFO L85 PathProgramCache]: Analyzing trace with hash -1246283889, now seen corresponding path program 1 times [2024-06-27 19:18:21,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:18:21,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648943189] [2024-06-27 19:18:21,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:18:21,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:18:21,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:18:21,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:18:21,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:18:21,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648943189] [2024-06-27 19:18:21,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648943189] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:18:21,994 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:18:21,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:18:21,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478021151] [2024-06-27 19:18:21,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:18:21,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:18:21,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:18:21,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:18:21,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:18:22,045 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-27 19:18:22,045 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 216 transitions, 3022 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:22,045 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:18:22,045 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-27 19:18:22,045 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:18:22,728 INFO L124 PetriNetUnfolderBase]: 3482/6049 cut-off events. [2024-06-27 19:18:22,728 INFO L125 PetriNetUnfolderBase]: For 140633/140640 co-relation queries the response was YES. [2024-06-27 19:18:22,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35307 conditions, 6049 events. 3482/6049 cut-off events. For 140633/140640 co-relation queries the response was YES. Maximal size of possible extension queue 382. Compared 43593 event pairs, 1334 based on Foata normal form. 8/6010 useless extension candidates. Maximal degree in co-relation 35230. Up to 5436 conditions per place. [2024-06-27 19:18:22,775 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 176 selfloop transitions, 19 changer transitions 0/228 dead transitions. [2024-06-27 19:18:22,775 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 228 transitions, 3464 flow [2024-06-27 19:18:22,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:18:22,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:18:22,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 118 transitions. [2024-06-27 19:18:22,776 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.59 [2024-06-27 19:18:22,776 INFO L175 Difference]: Start difference. First operand has 156 places, 216 transitions, 3022 flow. Second operand 5 states and 118 transitions. [2024-06-27 19:18:22,776 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 228 transitions, 3464 flow [2024-06-27 19:18:23,001 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 228 transitions, 3265 flow, removed 17 selfloop flow, removed 7 redundant places. [2024-06-27 19:18:23,005 INFO L231 Difference]: Finished difference. Result has 154 places, 219 transitions, 2903 flow [2024-06-27 19:18:23,005 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2823, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2903, PETRI_PLACES=154, PETRI_TRANSITIONS=219} [2024-06-27 19:18:23,005 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 113 predicate places. [2024-06-27 19:18:23,005 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 219 transitions, 2903 flow [2024-06-27 19:18:23,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:23,006 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:18:23,006 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:18:23,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-27 19:18:23,006 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:18:23,006 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:18:23,006 INFO L85 PathProgramCache]: Analyzing trace with hash -186849499, now seen corresponding path program 1 times [2024-06-27 19:18:23,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:18:23,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824742085] [2024-06-27 19:18:23,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:18:23,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:18:23,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:18:23,072 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:18:23,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:18:23,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824742085] [2024-06-27 19:18:23,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824742085] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:18:23,073 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:18:23,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:18:23,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542989730] [2024-06-27 19:18:23,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:18:23,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:18:23,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:18:23,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:18:23,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:18:23,106 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:18:23,106 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 219 transitions, 2903 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 19:18:23,107 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:18:23,107 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:18:23,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:18:23,768 INFO L124 PetriNetUnfolderBase]: 3635/6275 cut-off events. [2024-06-27 19:18:23,769 INFO L125 PetriNetUnfolderBase]: For 148824/148824 co-relation queries the response was YES. [2024-06-27 19:18:23,800 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36827 conditions, 6275 events. 3635/6275 cut-off events. For 148824/148824 co-relation queries the response was YES. Maximal size of possible extension queue 382. Compared 44818 event pairs, 1342 based on Foata normal form. 1/6274 useless extension candidates. Maximal degree in co-relation 36751. Up to 5774 conditions per place. [2024-06-27 19:18:23,821 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 216 selfloop transitions, 38 changer transitions 0/261 dead transitions. [2024-06-27 19:18:23,821 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 261 transitions, 3922 flow [2024-06-27 19:18:23,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:18:23,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:18:23,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 143 transitions. [2024-06-27 19:18:23,822 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5958333333333333 [2024-06-27 19:18:23,822 INFO L175 Difference]: Start difference. First operand has 154 places, 219 transitions, 2903 flow. Second operand 6 states and 143 transitions. [2024-06-27 19:18:23,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 261 transitions, 3922 flow [2024-06-27 19:18:24,053 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 261 transitions, 3858 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-27 19:18:24,057 INFO L231 Difference]: Finished difference. Result has 160 places, 242 transitions, 3394 flow [2024-06-27 19:18:24,058 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2847, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3394, PETRI_PLACES=160, PETRI_TRANSITIONS=242} [2024-06-27 19:18:24,058 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 119 predicate places. [2024-06-27 19:18:24,058 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 242 transitions, 3394 flow [2024-06-27 19:18:24,058 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 19:18:24,058 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:18:24,059 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:18:24,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-27 19:18:24,059 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:18:24,059 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:18:24,059 INFO L85 PathProgramCache]: Analyzing trace with hash -1423646607, now seen corresponding path program 1 times [2024-06-27 19:18:24,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:18:24,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508302910] [2024-06-27 19:18:24,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:18:24,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:18:24,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:18:24,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:18:24,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:18:24,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508302910] [2024-06-27 19:18:24,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508302910] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:18:24,133 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:18:24,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:18:24,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132222225] [2024-06-27 19:18:24,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:18:24,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:18:24,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:18:24,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:18:24,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:18:24,164 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:18:24,165 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 242 transitions, 3394 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 19:18:24,165 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:18:24,165 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:18:24,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:18:24,890 INFO L124 PetriNetUnfolderBase]: 3642/6291 cut-off events. [2024-06-27 19:18:24,891 INFO L125 PetriNetUnfolderBase]: For 161386/161393 co-relation queries the response was YES. [2024-06-27 19:18:24,922 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38255 conditions, 6291 events. 3642/6291 cut-off events. For 161386/161393 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 45003 event pairs, 1362 based on Foata normal form. 10/6298 useless extension candidates. Maximal degree in co-relation 38175. Up to 5756 conditions per place. [2024-06-27 19:18:24,943 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 219 selfloop transitions, 40 changer transitions 2/268 dead transitions. [2024-06-27 19:18:24,943 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 268 transitions, 4133 flow [2024-06-27 19:18:24,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:18:24,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:18:24,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 159 transitions. [2024-06-27 19:18:24,944 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5678571428571428 [2024-06-27 19:18:24,944 INFO L175 Difference]: Start difference. First operand has 160 places, 242 transitions, 3394 flow. Second operand 7 states and 159 transitions. [2024-06-27 19:18:24,945 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 268 transitions, 4133 flow [2024-06-27 19:18:25,263 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 268 transitions, 4069 flow, removed 32 selfloop flow, removed 0 redundant places. [2024-06-27 19:18:25,267 INFO L231 Difference]: Finished difference. Result has 168 places, 251 transitions, 3580 flow [2024-06-27 19:18:25,268 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3332, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3580, PETRI_PLACES=168, PETRI_TRANSITIONS=251} [2024-06-27 19:18:25,268 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 127 predicate places. [2024-06-27 19:18:25,268 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 251 transitions, 3580 flow [2024-06-27 19:18:25,268 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 19:18:25,268 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:18:25,268 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:18:25,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-27 19:18:25,269 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:18:25,269 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:18:25,269 INFO L85 PathProgramCache]: Analyzing trace with hash 1106322029, now seen corresponding path program 2 times [2024-06-27 19:18:25,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:18:25,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565060364] [2024-06-27 19:18:25,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:18:25,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:18:25,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:18:25,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:18:25,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:18:25,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565060364] [2024-06-27 19:18:25,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565060364] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:18:25,340 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:18:25,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:18:25,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235205742] [2024-06-27 19:18:25,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:18:25,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:18:25,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:18:25,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:18:25,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:18:25,369 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:18:25,369 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 251 transitions, 3580 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 19:18:25,369 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:18:25,369 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:18:25,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:18:26,202 INFO L124 PetriNetUnfolderBase]: 3645/6301 cut-off events. [2024-06-27 19:18:26,202 INFO L125 PetriNetUnfolderBase]: For 170525/170535 co-relation queries the response was YES. [2024-06-27 19:18:26,228 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38724 conditions, 6301 events. 3645/6301 cut-off events. For 170525/170535 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 45098 event pairs, 1360 based on Foata normal form. 10/6305 useless extension candidates. Maximal degree in co-relation 38640. Up to 5676 conditions per place. [2024-06-27 19:18:26,246 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 187 selfloop transitions, 77 changer transitions 1/272 dead transitions. [2024-06-27 19:18:26,247 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 272 transitions, 4343 flow [2024-06-27 19:18:26,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:18:26,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:18:26,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 143 transitions. [2024-06-27 19:18:26,248 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5958333333333333 [2024-06-27 19:18:26,248 INFO L175 Difference]: Start difference. First operand has 168 places, 251 transitions, 3580 flow. Second operand 6 states and 143 transitions. [2024-06-27 19:18:26,248 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 272 transitions, 4343 flow [2024-06-27 19:18:26,542 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 272 transitions, 4235 flow, removed 27 selfloop flow, removed 3 redundant places. [2024-06-27 19:18:26,546 INFO L231 Difference]: Finished difference. Result has 171 places, 256 transitions, 3731 flow [2024-06-27 19:18:26,546 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3472, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3731, PETRI_PLACES=171, PETRI_TRANSITIONS=256} [2024-06-27 19:18:26,546 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 130 predicate places. [2024-06-27 19:18:26,546 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 256 transitions, 3731 flow [2024-06-27 19:18:26,547 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 19:18:26,547 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:18:26,547 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:18:26,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-27 19:18:26,547 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 19:18:26,547 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:18:26,547 INFO L85 PathProgramCache]: Analyzing trace with hash 1106084879, now seen corresponding path program 3 times [2024-06-27 19:18:26,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:18:26,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558269973] [2024-06-27 19:18:26,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:18:26,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:18:26,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:18:26,617 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:18:26,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:18:26,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558269973] [2024-06-27 19:18:26,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558269973] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:18:26,618 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:18:26,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:18:26,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252379313] [2024-06-27 19:18:26,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:18:26,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:18:26,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:18:26,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:18:26,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:18:26,664 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:18:26,664 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 256 transitions, 3731 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 19:18:26,665 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:18:26,665 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:18:26,665 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:18:27,397 INFO L124 PetriNetUnfolderBase]: 3540/6097 cut-off events. [2024-06-27 19:18:27,397 INFO L125 PetriNetUnfolderBase]: For 174386/174393 co-relation queries the response was YES. [2024-06-27 19:18:27,428 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37678 conditions, 6097 events. 3540/6097 cut-off events. For 174386/174393 co-relation queries the response was YES. Maximal size of possible extension queue 365. Compared 43121 event pairs, 1308 based on Foata normal form. 12/6106 useless extension candidates. Maximal degree in co-relation 37593. Up to 5498 conditions per place. [2024-06-27 19:18:27,448 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 186 selfloop transitions, 76 changer transitions 5/274 dead transitions. [2024-06-27 19:18:27,448 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 274 transitions, 4326 flow [2024-06-27 19:18:27,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:18:27,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:18:27,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 164 transitions. [2024-06-27 19:18:27,449 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5857142857142857 [2024-06-27 19:18:27,449 INFO L175 Difference]: Start difference. First operand has 171 places, 256 transitions, 3731 flow. Second operand 7 states and 164 transitions. [2024-06-27 19:18:27,449 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 274 transitions, 4326 flow [2024-06-27 19:18:27,812 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 274 transitions, 4190 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-27 19:18:27,816 INFO L231 Difference]: Finished difference. Result has 175 places, 251 transitions, 3689 flow [2024-06-27 19:18:27,817 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3595, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3689, PETRI_PLACES=175, PETRI_TRANSITIONS=251} [2024-06-27 19:18:27,817 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 134 predicate places. [2024-06-27 19:18:27,817 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 251 transitions, 3689 flow [2024-06-27 19:18:27,817 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 19:18:27,817 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:18:27,818 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:18:27,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-27 19:18:27,818 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:18:27,818 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:18:27,818 INFO L85 PathProgramCache]: Analyzing trace with hash 1106330957, now seen corresponding path program 1 times [2024-06-27 19:18:27,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:18:27,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046843873] [2024-06-27 19:18:27,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:18:27,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:18:27,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:18:27,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:18:27,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:18:27,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046843873] [2024-06-27 19:18:27,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046843873] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:18:27,905 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:18:27,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:18:27,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627814851] [2024-06-27 19:18:27,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:18:27,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:18:27,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:18:27,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:18:27,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:18:27,960 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-27 19:18:27,961 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 251 transitions, 3689 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:27,961 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:18:27,961 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-27 19:18:27,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:18:28,827 INFO L124 PetriNetUnfolderBase]: 3225/5582 cut-off events. [2024-06-27 19:18:28,827 INFO L125 PetriNetUnfolderBase]: For 182284/182295 co-relation queries the response was YES. [2024-06-27 19:18:28,857 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35282 conditions, 5582 events. 3225/5582 cut-off events. For 182284/182295 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 39063 event pairs, 1158 based on Foata normal form. 22/5573 useless extension candidates. Maximal degree in co-relation 35196. Up to 4935 conditions per place. [2024-06-27 19:18:28,879 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 207 selfloop transitions, 22 changer transitions 0/266 dead transitions. [2024-06-27 19:18:28,880 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 266 transitions, 4221 flow [2024-06-27 19:18:28,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:18:28,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:18:28,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 121 transitions. [2024-06-27 19:18:28,881 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.605 [2024-06-27 19:18:28,881 INFO L175 Difference]: Start difference. First operand has 175 places, 251 transitions, 3689 flow. Second operand 5 states and 121 transitions. [2024-06-27 19:18:28,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 266 transitions, 4221 flow [2024-06-27 19:18:29,297 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 266 transitions, 4029 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-27 19:18:29,301 INFO L231 Difference]: Finished difference. Result has 173 places, 253 transitions, 3578 flow [2024-06-27 19:18:29,302 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3497, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3578, PETRI_PLACES=173, PETRI_TRANSITIONS=253} [2024-06-27 19:18:29,302 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 132 predicate places. [2024-06-27 19:18:29,302 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 253 transitions, 3578 flow [2024-06-27 19:18:29,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:29,302 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:18:29,303 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 19:18:29,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-27 19:18:29,303 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:18:29,303 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:18:29,303 INFO L85 PathProgramCache]: Analyzing trace with hash -1187095605, now seen corresponding path program 1 times [2024-06-27 19:18:29,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:18:29,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248507963] [2024-06-27 19:18:29,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:18:29,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:18:29,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:18:29,394 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:18:29,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:18:29,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248507963] [2024-06-27 19:18:29,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248507963] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:18:29,395 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:18:29,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:18:29,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334510851] [2024-06-27 19:18:29,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:18:29,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:18:29,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:18:29,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:18:29,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:18:29,424 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:18:29,424 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 253 transitions, 3578 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 19:18:29,424 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:18:29,424 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:18:29,425 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:18:30,223 INFO L124 PetriNetUnfolderBase]: 3343/5737 cut-off events. [2024-06-27 19:18:30,223 INFO L125 PetriNetUnfolderBase]: For 171578/171578 co-relation queries the response was YES. [2024-06-27 19:18:30,252 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36080 conditions, 5737 events. 3343/5737 cut-off events. For 171578/171578 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 39747 event pairs, 1210 based on Foata normal form. 1/5736 useless extension candidates. Maximal degree in co-relation 35993. Up to 5282 conditions per place. [2024-06-27 19:18:30,270 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 225 selfloop transitions, 42 changer transitions 0/274 dead transitions. [2024-06-27 19:18:30,270 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 274 transitions, 4215 flow [2024-06-27 19:18:30,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:18:30,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:18:30,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 160 transitions. [2024-06-27 19:18:30,271 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-27 19:18:30,271 INFO L175 Difference]: Start difference. First operand has 173 places, 253 transitions, 3578 flow. Second operand 7 states and 160 transitions. [2024-06-27 19:18:30,271 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 274 transitions, 4215 flow [2024-06-27 19:18:30,601 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 274 transitions, 4140 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-06-27 19:18:30,604 INFO L231 Difference]: Finished difference. Result has 177 places, 254 transitions, 3614 flow [2024-06-27 19:18:30,605 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3511, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3614, PETRI_PLACES=177, PETRI_TRANSITIONS=254} [2024-06-27 19:18:30,605 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 136 predicate places. [2024-06-27 19:18:30,605 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 254 transitions, 3614 flow [2024-06-27 19:18:30,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:30,605 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:18:30,606 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 19:18:30,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-27 19:18:30,606 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:18:30,606 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:18:30,606 INFO L85 PathProgramCache]: Analyzing trace with hash -1697775988, now seen corresponding path program 1 times [2024-06-27 19:18:30,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:18:30,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098345512] [2024-06-27 19:18:30,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:18:30,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:18:30,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:18:30,684 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:18:30,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:18:30,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098345512] [2024-06-27 19:18:30,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098345512] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:18:30,685 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:18:30,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:18:30,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788942904] [2024-06-27 19:18:30,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:18:30,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:18:30,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:18:30,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:18:30,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:18:30,732 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:18:30,732 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 254 transitions, 3614 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 19:18:30,733 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:18:30,733 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:18:30,733 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:18:31,485 INFO L124 PetriNetUnfolderBase]: 3356/5761 cut-off events. [2024-06-27 19:18:31,486 INFO L125 PetriNetUnfolderBase]: For 180560/180567 co-relation queries the response was YES. [2024-06-27 19:18:31,512 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36462 conditions, 5761 events. 3356/5761 cut-off events. For 180560/180567 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 39873 event pairs, 1216 based on Foata normal form. 7/5765 useless extension candidates. Maximal degree in co-relation 36374. Up to 5189 conditions per place. [2024-06-27 19:18:31,532 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 183 selfloop transitions, 89 changer transitions 0/279 dead transitions. [2024-06-27 19:18:31,532 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 279 transitions, 4378 flow [2024-06-27 19:18:31,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:18:31,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:18:31,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 183 transitions. [2024-06-27 19:18:31,535 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.571875 [2024-06-27 19:18:31,535 INFO L175 Difference]: Start difference. First operand has 177 places, 254 transitions, 3614 flow. Second operand 8 states and 183 transitions. [2024-06-27 19:18:31,535 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 279 transitions, 4378 flow [2024-06-27 19:18:31,885 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 279 transitions, 4258 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-27 19:18:31,889 INFO L231 Difference]: Finished difference. Result has 181 places, 260 transitions, 3836 flow [2024-06-27 19:18:31,889 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3496, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3836, PETRI_PLACES=181, PETRI_TRANSITIONS=260} [2024-06-27 19:18:31,889 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 140 predicate places. [2024-06-27 19:18:31,890 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 260 transitions, 3836 flow [2024-06-27 19:18:31,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:31,890 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:18:31,890 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 19:18:31,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-27 19:18:31,890 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 19:18:31,890 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:18:31,891 INFO L85 PathProgramCache]: Analyzing trace with hash 814851012, now seen corresponding path program 2 times [2024-06-27 19:18:31,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:18:31,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719941136] [2024-06-27 19:18:31,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:18:31,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:18:31,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:18:32,013 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:18:32,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:18:32,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719941136] [2024-06-27 19:18:32,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719941136] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:18:32,013 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:18:32,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:18:32,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151931849] [2024-06-27 19:18:32,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:18:32,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:18:32,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:18:32,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:18:32,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:18:32,056 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:18:32,057 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 260 transitions, 3836 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 19:18:32,057 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:18:32,057 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:18:32,057 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:18:32,764 INFO L124 PetriNetUnfolderBase]: 3377/5796 cut-off events. [2024-06-27 19:18:32,764 INFO L125 PetriNetUnfolderBase]: For 186766/186773 co-relation queries the response was YES. [2024-06-27 19:18:32,794 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37693 conditions, 5796 events. 3377/5796 cut-off events. For 186766/186773 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 40136 event pairs, 1214 based on Foata normal form. 7/5800 useless extension candidates. Maximal degree in co-relation 37603. Up to 5161 conditions per place. [2024-06-27 19:18:32,815 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 195 selfloop transitions, 98 changer transitions 0/300 dead transitions. [2024-06-27 19:18:32,815 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 300 transitions, 4980 flow [2024-06-27 19:18:32,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:18:32,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:18:32,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-27 19:18:32,816 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6107142857142858 [2024-06-27 19:18:32,816 INFO L175 Difference]: Start difference. First operand has 181 places, 260 transitions, 3836 flow. Second operand 7 states and 171 transitions. [2024-06-27 19:18:32,816 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 300 transitions, 4980 flow [2024-06-27 19:18:33,290 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 300 transitions, 4835 flow, removed 37 selfloop flow, removed 4 redundant places. [2024-06-27 19:18:33,295 INFO L231 Difference]: Finished difference. Result has 186 places, 277 transitions, 4277 flow [2024-06-27 19:18:33,295 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3701, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4277, PETRI_PLACES=186, PETRI_TRANSITIONS=277} [2024-06-27 19:18:33,295 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 145 predicate places. [2024-06-27 19:18:33,296 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 277 transitions, 4277 flow [2024-06-27 19:18:33,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:33,296 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:18:33,296 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 19:18:33,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-27 19:18:33,296 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 19:18:33,296 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:18:33,297 INFO L85 PathProgramCache]: Analyzing trace with hash 1854729140, now seen corresponding path program 3 times [2024-06-27 19:18:33,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:18:33,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659710096] [2024-06-27 19:18:33,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:18:33,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:18:33,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:18:33,376 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 19:18:33,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:18:33,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659710096] [2024-06-27 19:18:33,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659710096] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:18:33,376 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:18:33,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:18:33,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084613949] [2024-06-27 19:18:33,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:18:33,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:18:33,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:18:33,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:18:33,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:18:33,420 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:18:33,420 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 277 transitions, 4277 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 19:18:33,420 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:18:33,420 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:18:33,420 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:18:34,218 INFO L124 PetriNetUnfolderBase]: 3382/5802 cut-off events. [2024-06-27 19:18:34,219 INFO L125 PetriNetUnfolderBase]: For 192689/192696 co-relation queries the response was YES. [2024-06-27 19:18:34,243 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38894 conditions, 5802 events. 3382/5802 cut-off events. For 192689/192696 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 40180 event pairs, 1214 based on Foata normal form. 7/5806 useless extension candidates. Maximal degree in co-relation 38800. Up to 5165 conditions per place. [2024-06-27 19:18:34,260 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 191 selfloop transitions, 101 changer transitions 0/299 dead transitions. [2024-06-27 19:18:34,260 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 299 transitions, 5124 flow [2024-06-27 19:18:34,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:18:34,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:18:34,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2024-06-27 19:18:34,263 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5928571428571429 [2024-06-27 19:18:34,263 INFO L175 Difference]: Start difference. First operand has 186 places, 277 transitions, 4277 flow. Second operand 7 states and 166 transitions. [2024-06-27 19:18:34,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 299 transitions, 5124 flow [2024-06-27 19:18:34,635 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 299 transitions, 4986 flow, removed 69 selfloop flow, removed 0 redundant places. [2024-06-27 19:18:34,640 INFO L231 Difference]: Finished difference. Result has 193 places, 280 transitions, 4424 flow [2024-06-27 19:18:34,640 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4159, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4424, PETRI_PLACES=193, PETRI_TRANSITIONS=280} [2024-06-27 19:18:34,640 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 152 predicate places. [2024-06-27 19:18:34,640 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 280 transitions, 4424 flow [2024-06-27 19:18:34,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:34,641 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:18:34,641 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 19:18:34,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-27 19:18:34,641 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 19:18:34,641 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:18:34,641 INFO L85 PathProgramCache]: Analyzing trace with hash 941570022, now seen corresponding path program 4 times [2024-06-27 19:18:34,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:18:34,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797513155] [2024-06-27 19:18:34,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:18:34,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:18:34,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:18:34,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:18:34,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:18:34,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797513155] [2024-06-27 19:18:34,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797513155] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:18:34,723 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:18:34,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:18:34,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779198138] [2024-06-27 19:18:34,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:18:34,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:18:34,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:18:34,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:18:34,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:18:34,751 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:18:34,752 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 280 transitions, 4424 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 19:18:34,752 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:18:34,752 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:18:34,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:18:35,520 INFO L124 PetriNetUnfolderBase]: 3416/5850 cut-off events. [2024-06-27 19:18:35,520 INFO L125 PetriNetUnfolderBase]: For 199446/199453 co-relation queries the response was YES. [2024-06-27 19:18:35,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38770 conditions, 5850 events. 3416/5850 cut-off events. For 199446/199453 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 40490 event pairs, 1210 based on Foata normal form. 8/5855 useless extension candidates. Maximal degree in co-relation 38673. Up to 5337 conditions per place. [2024-06-27 19:18:35,580 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 251 selfloop transitions, 50 changer transitions 0/308 dead transitions. [2024-06-27 19:18:35,581 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 308 transitions, 5413 flow [2024-06-27 19:18:35,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:18:35,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:18:35,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 180 transitions. [2024-06-27 19:18:35,582 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5625 [2024-06-27 19:18:35,582 INFO L175 Difference]: Start difference. First operand has 193 places, 280 transitions, 4424 flow. Second operand 8 states and 180 transitions. [2024-06-27 19:18:35,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 308 transitions, 5413 flow [2024-06-27 19:18:36,031 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 308 transitions, 5202 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-27 19:18:36,035 INFO L231 Difference]: Finished difference. Result has 199 places, 291 transitions, 4573 flow [2024-06-27 19:18:36,036 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4227, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=280, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4573, PETRI_PLACES=199, PETRI_TRANSITIONS=291} [2024-06-27 19:18:36,036 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 158 predicate places. [2024-06-27 19:18:36,036 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 291 transitions, 4573 flow [2024-06-27 19:18:36,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:36,036 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:18:36,036 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 19:18:36,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-27 19:18:36,037 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 19:18:36,037 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:18:36,037 INFO L85 PathProgramCache]: Analyzing trace with hash 1970199056, now seen corresponding path program 1 times [2024-06-27 19:18:36,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:18:36,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734423247] [2024-06-27 19:18:36,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:18:36,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:18:36,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:18:36,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:18:36,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:18:36,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734423247] [2024-06-27 19:18:36,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734423247] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:18:36,117 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:18:36,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:18:36,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984523392] [2024-06-27 19:18:36,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:18:36,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:18:36,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:18:36,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:18:36,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:18:36,146 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:18:36,146 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 291 transitions, 4573 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 19:18:36,146 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:18:36,146 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:18:36,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:18:37,023 INFO L124 PetriNetUnfolderBase]: 3418/5851 cut-off events. [2024-06-27 19:18:37,023 INFO L125 PetriNetUnfolderBase]: For 207560/207567 co-relation queries the response was YES. [2024-06-27 19:18:37,049 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38966 conditions, 5851 events. 3418/5851 cut-off events. For 207560/207567 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 40422 event pairs, 1210 based on Foata normal form. 8/5856 useless extension candidates. Maximal degree in co-relation 38866. Up to 5341 conditions per place. [2024-06-27 19:18:37,066 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 251 selfloop transitions, 53 changer transitions 0/311 dead transitions. [2024-06-27 19:18:37,066 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 311 transitions, 5431 flow [2024-06-27 19:18:37,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:18:37,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:18:37,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 180 transitions. [2024-06-27 19:18:37,067 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5625 [2024-06-27 19:18:37,067 INFO L175 Difference]: Start difference. First operand has 199 places, 291 transitions, 4573 flow. Second operand 8 states and 180 transitions. [2024-06-27 19:18:37,067 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 311 transitions, 5431 flow [2024-06-27 19:18:37,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 311 transitions, 5305 flow, removed 28 selfloop flow, removed 4 redundant places. [2024-06-27 19:18:37,449 INFO L231 Difference]: Finished difference. Result has 203 places, 294 transitions, 4622 flow [2024-06-27 19:18:37,449 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4452, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=291, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4622, PETRI_PLACES=203, PETRI_TRANSITIONS=294} [2024-06-27 19:18:37,450 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 162 predicate places. [2024-06-27 19:18:37,450 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 294 transitions, 4622 flow [2024-06-27 19:18:37,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:37,450 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:18:37,450 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 19:18:37,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-27 19:18:37,450 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 19:18:37,451 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:18:37,451 INFO L85 PathProgramCache]: Analyzing trace with hash -1976398580, now seen corresponding path program 2 times [2024-06-27 19:18:37,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:18:37,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346415568] [2024-06-27 19:18:37,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:18:37,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:18:37,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:18:37,528 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:18:37,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:18:37,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346415568] [2024-06-27 19:18:37,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346415568] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:18:37,529 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:18:37,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:18:37,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318058879] [2024-06-27 19:18:37,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:18:37,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:18:37,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:18:37,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:18:37,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:18:37,566 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:18:37,567 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 294 transitions, 4622 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 19:18:37,567 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:18:37,567 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:18:37,567 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:18:38,347 INFO L124 PetriNetUnfolderBase]: 3439/5886 cut-off events. [2024-06-27 19:18:38,347 INFO L125 PetriNetUnfolderBase]: For 219113/219123 co-relation queries the response was YES. [2024-06-27 19:18:38,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39549 conditions, 5886 events. 3439/5886 cut-off events. For 219113/219123 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 40714 event pairs, 1226 based on Foata normal form. 9/5889 useless extension candidates. Maximal degree in co-relation 39448. Up to 5251 conditions per place. [2024-06-27 19:18:38,399 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 209 selfloop transitions, 104 changer transitions 0/320 dead transitions. [2024-06-27 19:18:38,399 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 320 transitions, 5695 flow [2024-06-27 19:18:38,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:18:38,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:18:38,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-06-27 19:18:38,400 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5821428571428572 [2024-06-27 19:18:38,400 INFO L175 Difference]: Start difference. First operand has 203 places, 294 transitions, 4622 flow. Second operand 7 states and 163 transitions. [2024-06-27 19:18:38,400 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 320 transitions, 5695 flow [2024-06-27 19:18:38,900 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 320 transitions, 5545 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-27 19:18:38,905 INFO L231 Difference]: Finished difference. Result has 205 places, 303 transitions, 4915 flow [2024-06-27 19:18:38,905 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4472, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4915, PETRI_PLACES=205, PETRI_TRANSITIONS=303} [2024-06-27 19:18:38,905 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 164 predicate places. [2024-06-27 19:18:38,906 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 303 transitions, 4915 flow [2024-06-27 19:18:38,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:38,906 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:18:38,906 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 19:18:38,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-27 19:18:38,906 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 19:18:38,906 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:18:38,907 INFO L85 PathProgramCache]: Analyzing trace with hash 2090488820, now seen corresponding path program 5 times [2024-06-27 19:18:38,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:18:38,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960595012] [2024-06-27 19:18:38,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:18:38,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:18:38,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:18:38,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:18:39,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:18:39,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960595012] [2024-06-27 19:18:39,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960595012] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:18:39,000 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:18:39,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:18:39,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740738618] [2024-06-27 19:18:39,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:18:39,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:18:39,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:18:39,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:18:39,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:18:39,046 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:18:39,046 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 303 transitions, 4915 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 19:18:39,046 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:18:39,046 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:18:39,046 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:18:39,928 INFO L124 PetriNetUnfolderBase]: 3433/5877 cut-off events. [2024-06-27 19:18:39,928 INFO L125 PetriNetUnfolderBase]: For 227784/227791 co-relation queries the response was YES. [2024-06-27 19:18:39,956 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39868 conditions, 5877 events. 3433/5877 cut-off events. For 227784/227791 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 40675 event pairs, 1213 based on Foata normal form. 8/5882 useless extension candidates. Maximal degree in co-relation 39765. Up to 5246 conditions per place. [2024-06-27 19:18:39,974 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 209 selfloop transitions, 110 changer transitions 0/326 dead transitions. [2024-06-27 19:18:39,974 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 326 transitions, 5765 flow [2024-06-27 19:18:39,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:18:39,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:18:39,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 188 transitions. [2024-06-27 19:18:39,975 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5875 [2024-06-27 19:18:39,975 INFO L175 Difference]: Start difference. First operand has 205 places, 303 transitions, 4915 flow. Second operand 8 states and 188 transitions. [2024-06-27 19:18:39,975 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 326 transitions, 5765 flow [2024-06-27 19:18:40,453 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 326 transitions, 5595 flow, removed 48 selfloop flow, removed 2 redundant places. [2024-06-27 19:18:40,458 INFO L231 Difference]: Finished difference. Result has 211 places, 303 transitions, 4981 flow [2024-06-27 19:18:40,459 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4745, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4981, PETRI_PLACES=211, PETRI_TRANSITIONS=303} [2024-06-27 19:18:40,459 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 170 predicate places. [2024-06-27 19:18:40,459 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 303 transitions, 4981 flow [2024-06-27 19:18:40,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:40,459 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:18:40,459 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 19:18:40,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-27 19:18:40,460 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 19:18:40,460 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:18:40,460 INFO L85 PathProgramCache]: Analyzing trace with hash 2090667566, now seen corresponding path program 3 times [2024-06-27 19:18:40,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:18:40,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153404418] [2024-06-27 19:18:40,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:18:40,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:18:40,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:18:40,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:18:40,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:18:40,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153404418] [2024-06-27 19:18:40,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153404418] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:18:40,538 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:18:40,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:18:40,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956682885] [2024-06-27 19:18:40,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:18:40,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:18:40,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:18:40,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:18:40,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:18:40,576 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:18:40,577 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 303 transitions, 4981 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 19:18:40,577 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:18:40,577 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:18:40,577 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:18:41,391 INFO L124 PetriNetUnfolderBase]: 3435/5881 cut-off events. [2024-06-27 19:18:41,392 INFO L125 PetriNetUnfolderBase]: For 236734/236741 co-relation queries the response was YES. [2024-06-27 19:18:41,426 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40347 conditions, 5881 events. 3435/5881 cut-off events. For 236734/236741 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 40673 event pairs, 1213 based on Foata normal form. 8/5886 useless extension candidates. Maximal degree in co-relation 40242. Up to 5250 conditions per place. [2024-06-27 19:18:41,445 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 210 selfloop transitions, 109 changer transitions 0/326 dead transitions. [2024-06-27 19:18:41,445 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 326 transitions, 5901 flow [2024-06-27 19:18:41,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:18:41,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:18:41,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 185 transitions. [2024-06-27 19:18:41,446 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.578125 [2024-06-27 19:18:41,446 INFO L175 Difference]: Start difference. First operand has 211 places, 303 transitions, 4981 flow. Second operand 8 states and 185 transitions. [2024-06-27 19:18:41,446 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 326 transitions, 5901 flow [2024-06-27 19:18:42,104 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 326 transitions, 5652 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-27 19:18:42,108 INFO L231 Difference]: Finished difference. Result has 212 places, 306 transitions, 5040 flow [2024-06-27 19:18:42,109 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4739, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5040, PETRI_PLACES=212, PETRI_TRANSITIONS=306} [2024-06-27 19:18:42,109 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 171 predicate places. [2024-06-27 19:18:42,109 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 306 transitions, 5040 flow [2024-06-27 19:18:42,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:42,109 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:18:42,109 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 19:18:42,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-27 19:18:42,110 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 19:18:42,110 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:18:42,110 INFO L85 PathProgramCache]: Analyzing trace with hash -1982112500, now seen corresponding path program 4 times [2024-06-27 19:18:42,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:18:42,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322986595] [2024-06-27 19:18:42,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:18:42,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:18:42,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:18:42,188 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:18:42,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:18:42,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322986595] [2024-06-27 19:18:42,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322986595] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:18:42,189 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:18:42,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:18:42,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975545157] [2024-06-27 19:18:42,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:18:42,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:18:42,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:18:42,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:18:42,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:18:42,236 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:18:42,236 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 306 transitions, 5040 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 19:18:42,236 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:18:42,236 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:18:42,237 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:18:43,140 INFO L124 PetriNetUnfolderBase]: 3432/5876 cut-off events. [2024-06-27 19:18:43,141 INFO L125 PetriNetUnfolderBase]: For 236218/236228 co-relation queries the response was YES. [2024-06-27 19:18:43,175 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40274 conditions, 5876 events. 3432/5876 cut-off events. For 236218/236228 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 40656 event pairs, 1226 based on Foata normal form. 9/5879 useless extension candidates. Maximal degree in co-relation 40169. Up to 5248 conditions per place. [2024-06-27 19:18:43,197 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 207 selfloop transitions, 108 changer transitions 0/322 dead transitions. [2024-06-27 19:18:43,198 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 322 transitions, 5868 flow [2024-06-27 19:18:43,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:18:43,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:18:43,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-06-27 19:18:43,199 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5821428571428572 [2024-06-27 19:18:43,199 INFO L175 Difference]: Start difference. First operand has 212 places, 306 transitions, 5040 flow. Second operand 7 states and 163 transitions. [2024-06-27 19:18:43,199 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 322 transitions, 5868 flow [2024-06-27 19:18:43,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 322 transitions, 5517 flow, removed 36 selfloop flow, removed 8 redundant places. [2024-06-27 19:18:43,726 INFO L231 Difference]: Finished difference. Result has 211 places, 306 transitions, 4915 flow [2024-06-27 19:18:43,726 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4693, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=306, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4915, PETRI_PLACES=211, PETRI_TRANSITIONS=306} [2024-06-27 19:18:43,726 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 170 predicate places. [2024-06-27 19:18:43,727 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 306 transitions, 4915 flow [2024-06-27 19:18:43,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:43,727 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:18:43,727 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 19:18:43,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-27 19:18:43,727 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 19:18:43,728 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:18:43,728 INFO L85 PathProgramCache]: Analyzing trace with hash -1982103572, now seen corresponding path program 1 times [2024-06-27 19:18:43,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:18:43,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384959686] [2024-06-27 19:18:43,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:18:43,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:18:43,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:18:43,820 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:18:43,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:18:43,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384959686] [2024-06-27 19:18:43,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384959686] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:18:43,820 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:18:43,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:18:43,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177392265] [2024-06-27 19:18:43,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:18:43,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:18:43,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:18:43,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:18:43,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:18:43,860 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-27 19:18:43,860 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 306 transitions, 4915 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:43,860 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:18:43,860 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-27 19:18:43,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:18:44,720 INFO L124 PetriNetUnfolderBase]: 3342/5762 cut-off events. [2024-06-27 19:18:44,720 INFO L125 PetriNetUnfolderBase]: For 240523/240528 co-relation queries the response was YES. [2024-06-27 19:18:44,753 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39398 conditions, 5762 events. 3342/5762 cut-off events. For 240523/240528 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 40325 event pairs, 1199 based on Foata normal form. 14/5743 useless extension candidates. Maximal degree in co-relation 39293. Up to 5090 conditions per place. [2024-06-27 19:18:44,772 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 243 selfloop transitions, 25 changer transitions 0/321 dead transitions. [2024-06-27 19:18:44,772 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 321 transitions, 5519 flow [2024-06-27 19:18:44,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:18:44,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:18:44,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 139 transitions. [2024-06-27 19:18:44,773 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5791666666666667 [2024-06-27 19:18:44,773 INFO L175 Difference]: Start difference. First operand has 211 places, 306 transitions, 4915 flow. Second operand 6 states and 139 transitions. [2024-06-27 19:18:44,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 321 transitions, 5519 flow [2024-06-27 19:18:45,266 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 321 transitions, 5286 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-27 19:18:45,271 INFO L231 Difference]: Finished difference. Result has 212 places, 307 transitions, 4756 flow [2024-06-27 19:18:45,271 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4682, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=306, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4756, PETRI_PLACES=212, PETRI_TRANSITIONS=307} [2024-06-27 19:18:45,271 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 171 predicate places. [2024-06-27 19:18:45,272 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 307 transitions, 4756 flow [2024-06-27 19:18:45,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:45,272 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:18:45,272 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 19:18:45,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-27 19:18:45,272 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 19:18:45,272 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:18:45,273 INFO L85 PathProgramCache]: Analyzing trace with hash -1967818772, now seen corresponding path program 2 times [2024-06-27 19:18:45,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:18:45,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069805697] [2024-06-27 19:18:45,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:18:45,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:18:45,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:18:45,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:18:45,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:18:45,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069805697] [2024-06-27 19:18:45,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069805697] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:18:45,362 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:18:45,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:18:45,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95164157] [2024-06-27 19:18:45,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:18:45,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:18:45,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:18:45,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:18:45,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:18:45,416 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-27 19:18:45,416 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 307 transitions, 4756 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:45,417 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:18:45,417 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-27 19:18:45,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:18:46,211 INFO L124 PetriNetUnfolderBase]: 3351/5778 cut-off events. [2024-06-27 19:18:46,212 INFO L125 PetriNetUnfolderBase]: For 245262/245267 co-relation queries the response was YES. [2024-06-27 19:18:46,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39375 conditions, 5778 events. 3351/5778 cut-off events. For 245262/245267 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 40507 event pairs, 1153 based on Foata normal form. 13/5763 useless extension candidates. Maximal degree in co-relation 39269. Up to 5019 conditions per place. [2024-06-27 19:18:46,266 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 244 selfloop transitions, 28 changer transitions 0/325 dead transitions. [2024-06-27 19:18:46,266 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 325 transitions, 5388 flow [2024-06-27 19:18:46,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:18:46,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:18:46,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 141 transitions. [2024-06-27 19:18:46,267 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5875 [2024-06-27 19:18:46,267 INFO L175 Difference]: Start difference. First operand has 212 places, 307 transitions, 4756 flow. Second operand 6 states and 141 transitions. [2024-06-27 19:18:46,267 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 325 transitions, 5388 flow [2024-06-27 19:18:46,854 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 325 transitions, 5330 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-27 19:18:46,859 INFO L231 Difference]: Finished difference. Result has 214 places, 308 transitions, 4778 flow [2024-06-27 19:18:46,859 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4698, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=307, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4778, PETRI_PLACES=214, PETRI_TRANSITIONS=308} [2024-06-27 19:18:46,859 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 173 predicate places. [2024-06-27 19:18:46,859 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 308 transitions, 4778 flow [2024-06-27 19:18:46,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:46,860 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:18:46,860 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 19:18:46,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-27 19:18:46,860 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 19:18:46,860 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:18:46,860 INFO L85 PathProgramCache]: Analyzing trace with hash 1851881108, now seen corresponding path program 1 times [2024-06-27 19:18:46,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:18:46,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345662976] [2024-06-27 19:18:46,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:18:46,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:18:46,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:18:46,945 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:18:46,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:18:46,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345662976] [2024-06-27 19:18:46,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345662976] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:18:46,945 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:18:46,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:18:46,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296094723] [2024-06-27 19:18:46,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:18:46,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:18:46,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:18:46,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:18:46,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:18:46,993 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:18:46,994 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 308 transitions, 4778 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 19:18:46,994 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:18:46,994 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:18:46,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:18:47,788 INFO L124 PetriNetUnfolderBase]: 3478/5955 cut-off events. [2024-06-27 19:18:47,788 INFO L125 PetriNetUnfolderBase]: For 252291/252291 co-relation queries the response was YES. [2024-06-27 19:18:47,823 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40744 conditions, 5955 events. 3478/5955 cut-off events. For 252291/252291 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 41240 event pairs, 1177 based on Foata normal form. 2/5955 useless extension candidates. Maximal degree in co-relation 40637. Up to 5369 conditions per place. [2024-06-27 19:18:47,842 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 285 selfloop transitions, 51 changer transitions 0/343 dead transitions. [2024-06-27 19:18:47,843 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 343 transitions, 5808 flow [2024-06-27 19:18:47,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:18:47,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:18:47,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-27 19:18:47,843 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-27 19:18:47,844 INFO L175 Difference]: Start difference. First operand has 214 places, 308 transitions, 4778 flow. Second operand 7 states and 168 transitions. [2024-06-27 19:18:47,844 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 343 transitions, 5808 flow [2024-06-27 19:18:48,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 343 transitions, 5740 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-27 19:18:48,374 INFO L231 Difference]: Finished difference. Result has 218 places, 314 transitions, 4977 flow [2024-06-27 19:18:48,374 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4712, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4977, PETRI_PLACES=218, PETRI_TRANSITIONS=314} [2024-06-27 19:18:48,375 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 177 predicate places. [2024-06-27 19:18:48,375 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 314 transitions, 4977 flow [2024-06-27 19:18:48,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:48,375 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:18:48,375 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 19:18:48,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-27 19:18:48,376 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 19:18:48,376 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:18:48,376 INFO L85 PathProgramCache]: Analyzing trace with hash 1851941558, now seen corresponding path program 2 times [2024-06-27 19:18:48,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:18:48,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378880587] [2024-06-27 19:18:48,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:18:48,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:18:48,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:18:48,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:18:48,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:18:48,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378880587] [2024-06-27 19:18:48,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378880587] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:18:48,458 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:18:48,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:18:48,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188612479] [2024-06-27 19:18:48,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:18:48,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:18:48,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:18:48,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:18:48,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:18:48,496 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:18:48,496 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 314 transitions, 4977 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 19:18:48,496 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:18:48,496 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:18:48,496 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:18:49,321 INFO L124 PetriNetUnfolderBase]: 3473/5946 cut-off events. [2024-06-27 19:18:49,321 INFO L125 PetriNetUnfolderBase]: For 261458/261458 co-relation queries the response was YES. [2024-06-27 19:18:49,357 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40952 conditions, 5946 events. 3473/5946 cut-off events. For 261458/261458 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 41194 event pairs, 1211 based on Foata normal form. 2/5946 useless extension candidates. Maximal degree in co-relation 40843. Up to 5467 conditions per place. [2024-06-27 19:18:49,377 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 284 selfloop transitions, 44 changer transitions 0/335 dead transitions. [2024-06-27 19:18:49,377 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 335 transitions, 5729 flow [2024-06-27 19:18:49,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:18:49,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:18:49,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 160 transitions. [2024-06-27 19:18:49,378 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-27 19:18:49,378 INFO L175 Difference]: Start difference. First operand has 218 places, 314 transitions, 4977 flow. Second operand 7 states and 160 transitions. [2024-06-27 19:18:49,379 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 335 transitions, 5729 flow [2024-06-27 19:18:50,012 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 335 transitions, 5584 flow, removed 46 selfloop flow, removed 3 redundant places. [2024-06-27 19:18:50,017 INFO L231 Difference]: Finished difference. Result has 222 places, 314 transitions, 4925 flow [2024-06-27 19:18:50,017 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4832, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=314, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4925, PETRI_PLACES=222, PETRI_TRANSITIONS=314} [2024-06-27 19:18:50,018 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 181 predicate places. [2024-06-27 19:18:50,018 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 314 transitions, 4925 flow [2024-06-27 19:18:50,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:50,018 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:18:50,018 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 19:18:50,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-27 19:18:50,019 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 19:18:50,019 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:18:50,019 INFO L85 PathProgramCache]: Analyzing trace with hash 941763648, now seen corresponding path program 1 times [2024-06-27 19:18:50,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:18:50,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825707564] [2024-06-27 19:18:50,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:18:50,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:18:50,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:18:50,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:18:50,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:18:50,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825707564] [2024-06-27 19:18:50,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825707564] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:18:50,108 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:18:50,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:18:50,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982767873] [2024-06-27 19:18:50,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:18:50,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:18:50,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:18:50,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:18:50,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:18:50,172 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:18:50,172 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 314 transitions, 4925 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 19:18:50,172 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:18:50,172 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:18:50,172 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:18:51,076 INFO L124 PetriNetUnfolderBase]: 3532/6041 cut-off events. [2024-06-27 19:18:51,077 INFO L125 PetriNetUnfolderBase]: For 288268/288275 co-relation queries the response was YES. [2024-06-27 19:18:51,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41596 conditions, 6041 events. 3532/6041 cut-off events. For 288268/288275 co-relation queries the response was YES. Maximal size of possible extension queue 346. Compared 42032 event pairs, 1225 based on Foata normal form. 26/6064 useless extension candidates. Maximal degree in co-relation 41485. Up to 5465 conditions per place. [2024-06-27 19:18:51,127 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 286 selfloop transitions, 43 changer transitions 0/336 dead transitions. [2024-06-27 19:18:51,128 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 336 transitions, 5709 flow [2024-06-27 19:18:51,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:18:51,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:18:51,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 181 transitions. [2024-06-27 19:18:51,128 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.565625 [2024-06-27 19:18:51,129 INFO L175 Difference]: Start difference. First operand has 222 places, 314 transitions, 4925 flow. Second operand 8 states and 181 transitions. [2024-06-27 19:18:51,129 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 336 transitions, 5709 flow [2024-06-27 19:18:51,813 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 336 transitions, 5608 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-27 19:18:51,817 INFO L231 Difference]: Finished difference. Result has 225 places, 317 transitions, 4985 flow [2024-06-27 19:18:51,818 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4824, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=314, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4985, PETRI_PLACES=225, PETRI_TRANSITIONS=317} [2024-06-27 19:18:51,818 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 184 predicate places. [2024-06-27 19:18:51,818 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 317 transitions, 4985 flow [2024-06-27 19:18:51,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:51,818 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:18:51,818 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 19:18:51,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-27 19:18:51,819 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 19:18:51,819 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:18:51,819 INFO L85 PathProgramCache]: Analyzing trace with hash 2090682446, now seen corresponding path program 2 times [2024-06-27 19:18:51,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:18:51,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074299055] [2024-06-27 19:18:51,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:18:51,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:18:51,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:18:51,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:18:51,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:18:51,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074299055] [2024-06-27 19:18:51,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074299055] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:18:51,906 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:18:51,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:18:51,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477754793] [2024-06-27 19:18:51,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:18:51,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:18:51,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:18:51,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:18:51,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:18:51,941 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:18:51,941 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 317 transitions, 4985 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 19:18:51,942 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:18:51,942 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:18:51,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:18:52,876 INFO L124 PetriNetUnfolderBase]: 3614/6179 cut-off events. [2024-06-27 19:18:52,876 INFO L125 PetriNetUnfolderBase]: For 307745/307752 co-relation queries the response was YES. [2024-06-27 19:18:52,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42607 conditions, 6179 events. 3614/6179 cut-off events. For 307745/307752 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 43052 event pairs, 1239 based on Foata normal form. 36/6212 useless extension candidates. Maximal degree in co-relation 42495. Up to 5410 conditions per place. [2024-06-27 19:18:52,935 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 253 selfloop transitions, 84 changer transitions 0/344 dead transitions. [2024-06-27 19:18:52,935 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 344 transitions, 5821 flow [2024-06-27 19:18:52,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:18:52,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:18:52,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 186 transitions. [2024-06-27 19:18:52,936 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.58125 [2024-06-27 19:18:52,936 INFO L175 Difference]: Start difference. First operand has 225 places, 317 transitions, 4985 flow. Second operand 8 states and 186 transitions. [2024-06-27 19:18:52,936 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 344 transitions, 5821 flow [2024-06-27 19:18:53,742 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 344 transitions, 5696 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-27 19:18:53,747 INFO L231 Difference]: Finished difference. Result has 227 places, 322 transitions, 5146 flow [2024-06-27 19:18:53,747 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4860, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=317, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5146, PETRI_PLACES=227, PETRI_TRANSITIONS=322} [2024-06-27 19:18:53,747 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 186 predicate places. [2024-06-27 19:18:53,747 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 322 transitions, 5146 flow [2024-06-27 19:18:53,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:53,748 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:18:53,748 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 19:18:53,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-27 19:18:53,748 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 19:18:53,748 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:18:53,748 INFO L85 PathProgramCache]: Analyzing trace with hash -1968109490, now seen corresponding path program 3 times [2024-06-27 19:18:53,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:18:53,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524567909] [2024-06-27 19:18:53,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:18:53,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:18:53,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:18:53,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:18:53,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:18:53,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524567909] [2024-06-27 19:18:53,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524567909] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:18:53,831 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:18:53,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:18:53,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248468032] [2024-06-27 19:18:53,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:18:53,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:18:53,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:18:53,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:18:53,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:18:53,854 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:18:53,855 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 322 transitions, 5146 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 19:18:53,855 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:18:53,855 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:18:53,855 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:18:54,835 INFO L124 PetriNetUnfolderBase]: 3590/6134 cut-off events. [2024-06-27 19:18:54,836 INFO L125 PetriNetUnfolderBase]: For 290188/290198 co-relation queries the response was YES. [2024-06-27 19:18:54,866 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42571 conditions, 6134 events. 3590/6134 cut-off events. For 290188/290198 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 42654 event pairs, 1244 based on Foata normal form. 12/6140 useless extension candidates. Maximal degree in co-relation 42458. Up to 5548 conditions per place. [2024-06-27 19:18:54,885 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 257 selfloop transitions, 76 changer transitions 0/340 dead transitions. [2024-06-27 19:18:54,885 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 340 transitions, 5898 flow [2024-06-27 19:18:54,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:18:54,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:18:54,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 161 transitions. [2024-06-27 19:18:54,886 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.575 [2024-06-27 19:18:54,886 INFO L175 Difference]: Start difference. First operand has 227 places, 322 transitions, 5146 flow. Second operand 7 states and 161 transitions. [2024-06-27 19:18:54,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 340 transitions, 5898 flow [2024-06-27 19:18:55,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 340 transitions, 5711 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-27 19:18:55,525 INFO L231 Difference]: Finished difference. Result has 229 places, 325 transitions, 5174 flow [2024-06-27 19:18:55,525 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4959, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=322, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5174, PETRI_PLACES=229, PETRI_TRANSITIONS=325} [2024-06-27 19:18:55,525 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 188 predicate places. [2024-06-27 19:18:55,525 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 325 transitions, 5174 flow [2024-06-27 19:18:55,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:55,526 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:18:55,526 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 19:18:55,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-27 19:18:55,526 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 19:18:55,526 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:18:55,526 INFO L85 PathProgramCache]: Analyzing trace with hash -1967812820, now seen corresponding path program 4 times [2024-06-27 19:18:55,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:18:55,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483182328] [2024-06-27 19:18:55,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:18:55,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:18:55,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:18:55,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:18:55,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:18:55,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483182328] [2024-06-27 19:18:55,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483182328] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:18:55,619 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:18:55,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:18:55,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798746097] [2024-06-27 19:18:55,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:18:55,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:18:55,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:18:55,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:18:55,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:18:55,661 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:18:55,666 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 325 transitions, 5174 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 19:18:55,667 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:18:55,667 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:18:55,667 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:18:56,602 INFO L124 PetriNetUnfolderBase]: 3566/6094 cut-off events. [2024-06-27 19:18:56,602 INFO L125 PetriNetUnfolderBase]: For 295299/295309 co-relation queries the response was YES. [2024-06-27 19:18:56,642 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42191 conditions, 6094 events. 3566/6094 cut-off events. For 295299/295309 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 42350 event pairs, 1198 based on Foata normal form. 12/6100 useless extension candidates. Maximal degree in co-relation 42077. Up to 5290 conditions per place. [2024-06-27 19:18:56,663 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 251 selfloop transitions, 88 changer transitions 0/346 dead transitions. [2024-06-27 19:18:56,664 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 346 transitions, 5942 flow [2024-06-27 19:18:56,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:18:56,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:18:56,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 165 transitions. [2024-06-27 19:18:56,665 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5892857142857143 [2024-06-27 19:18:56,665 INFO L175 Difference]: Start difference. First operand has 229 places, 325 transitions, 5174 flow. Second operand 7 states and 165 transitions. [2024-06-27 19:18:56,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 346 transitions, 5942 flow [2024-06-27 19:18:57,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 346 transitions, 5774 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-27 19:18:57,406 INFO L231 Difference]: Finished difference. Result has 233 places, 327 transitions, 5244 flow [2024-06-27 19:18:57,406 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5006, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=325, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5244, PETRI_PLACES=233, PETRI_TRANSITIONS=327} [2024-06-27 19:18:57,406 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 192 predicate places. [2024-06-27 19:18:57,406 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 327 transitions, 5244 flow [2024-06-27 19:18:57,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:57,407 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:18:57,407 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:18:57,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-27 19:18:57,407 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 19:18:57,408 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:18:57,408 INFO L85 PathProgramCache]: Analyzing trace with hash -871962364, now seen corresponding path program 1 times [2024-06-27 19:18:57,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:18:57,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189593509] [2024-06-27 19:18:57,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:18:57,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:18:57,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:18:57,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:18:57,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:18:57,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189593509] [2024-06-27 19:18:57,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189593509] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:18:57,513 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:18:57,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:18:57,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953465385] [2024-06-27 19:18:57,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:18:57,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:18:57,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:18:57,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:18:57,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:18:57,559 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:18:57,559 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 327 transitions, 5244 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:57,559 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:18:57,559 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:18:57,559 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:18:58,464 INFO L124 PetriNetUnfolderBase]: 3610/6161 cut-off events. [2024-06-27 19:18:58,465 INFO L125 PetriNetUnfolderBase]: For 307292/307296 co-relation queries the response was YES. [2024-06-27 19:18:58,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43458 conditions, 6161 events. 3610/6161 cut-off events. For 307292/307296 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 42791 event pairs, 1173 based on Foata normal form. 2/6158 useless extension candidates. Maximal degree in co-relation 43342. Up to 5512 conditions per place. [2024-06-27 19:18:58,524 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 248 selfloop transitions, 113 changer transitions 0/368 dead transitions. [2024-06-27 19:18:58,524 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 368 transitions, 6644 flow [2024-06-27 19:18:58,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:18:58,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:18:58,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-27 19:18:58,525 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6107142857142858 [2024-06-27 19:18:58,525 INFO L175 Difference]: Start difference. First operand has 233 places, 327 transitions, 5244 flow. Second operand 7 states and 171 transitions. [2024-06-27 19:18:58,525 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 368 transitions, 6644 flow [2024-06-27 19:18:59,348 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 368 transitions, 6450 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-27 19:18:59,353 INFO L231 Difference]: Finished difference. Result has 238 places, 347 transitions, 5845 flow [2024-06-27 19:18:59,353 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5068, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=327, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5845, PETRI_PLACES=238, PETRI_TRANSITIONS=347} [2024-06-27 19:18:59,354 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 197 predicate places. [2024-06-27 19:18:59,354 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 347 transitions, 5845 flow [2024-06-27 19:18:59,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:59,354 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:18:59,354 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:18:59,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-27 19:18:59,354 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 19:18:59,355 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:18:59,355 INFO L85 PathProgramCache]: Analyzing trace with hash 2135512350, now seen corresponding path program 2 times [2024-06-27 19:18:59,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:18:59,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567628062] [2024-06-27 19:18:59,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:18:59,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:18:59,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:18:59,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:18:59,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:18:59,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567628062] [2024-06-27 19:18:59,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567628062] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:18:59,455 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:18:59,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:18:59,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816310772] [2024-06-27 19:18:59,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:18:59,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:18:59,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:18:59,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:18:59,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:18:59,509 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:18:59,509 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 347 transitions, 5845 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:59,509 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:18:59,509 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:18:59,509 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:19:00,456 INFO L124 PetriNetUnfolderBase]: 3606/6160 cut-off events. [2024-06-27 19:19:00,457 INFO L125 PetriNetUnfolderBase]: For 321770/321774 co-relation queries the response was YES. [2024-06-27 19:19:00,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44895 conditions, 6160 events. 3606/6160 cut-off events. For 321770/321774 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 42837 event pairs, 1200 based on Foata normal form. 3/6158 useless extension candidates. Maximal degree in co-relation 44776. Up to 5588 conditions per place. [2024-06-27 19:19:00,517 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 288 selfloop transitions, 68 changer transitions 0/363 dead transitions. [2024-06-27 19:19:00,517 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 363 transitions, 6701 flow [2024-06-27 19:19:00,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:19:00,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:19:00,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 165 transitions. [2024-06-27 19:19:00,518 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5892857142857143 [2024-06-27 19:19:00,518 INFO L175 Difference]: Start difference. First operand has 238 places, 347 transitions, 5845 flow. Second operand 7 states and 165 transitions. [2024-06-27 19:19:00,518 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 363 transitions, 6701 flow [2024-06-27 19:19:01,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 363 transitions, 6513 flow, removed 39 selfloop flow, removed 4 redundant places. [2024-06-27 19:19:01,309 INFO L231 Difference]: Finished difference. Result has 241 places, 348 transitions, 5825 flow [2024-06-27 19:19:01,309 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5657, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5825, PETRI_PLACES=241, PETRI_TRANSITIONS=348} [2024-06-27 19:19:01,310 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 200 predicate places. [2024-06-27 19:19:01,310 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 348 transitions, 5825 flow [2024-06-27 19:19:01,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:01,310 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:19:01,310 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:19:01,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-27 19:19:01,310 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:19:01,310 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:19:01,311 INFO L85 PathProgramCache]: Analyzing trace with hash 2135512536, now seen corresponding path program 1 times [2024-06-27 19:19:01,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:19:01,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416037238] [2024-06-27 19:19:01,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:19:01,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:19:01,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:19:01,402 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:19:01,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:19:01,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416037238] [2024-06-27 19:19:01,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416037238] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:19:01,403 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:19:01,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:19:01,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741180848] [2024-06-27 19:19:01,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:19:01,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:19:01,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:19:01,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:19:01,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:19:01,451 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:19:01,451 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 348 transitions, 5825 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:01,451 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:19:01,451 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:19:01,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:19:02,397 INFO L124 PetriNetUnfolderBase]: 3598/6148 cut-off events. [2024-06-27 19:19:02,397 INFO L125 PetriNetUnfolderBase]: For 330449/330453 co-relation queries the response was YES. [2024-06-27 19:19:02,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44989 conditions, 6148 events. 3598/6148 cut-off events. For 330449/330453 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 42761 event pairs, 1224 based on Foata normal form. 3/6146 useless extension candidates. Maximal degree in co-relation 44869. Up to 5580 conditions per place. [2024-06-27 19:19:02,459 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 287 selfloop transitions, 68 changer transitions 0/362 dead transitions. [2024-06-27 19:19:02,459 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 362 transitions, 6569 flow [2024-06-27 19:19:02,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:19:02,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:19:02,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 164 transitions. [2024-06-27 19:19:02,460 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5857142857142857 [2024-06-27 19:19:02,460 INFO L175 Difference]: Start difference. First operand has 241 places, 348 transitions, 5825 flow. Second operand 7 states and 164 transitions. [2024-06-27 19:19:02,460 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 362 transitions, 6569 flow [2024-06-27 19:19:03,384 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 362 transitions, 6402 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-27 19:19:03,389 INFO L231 Difference]: Finished difference. Result has 244 places, 348 transitions, 5816 flow [2024-06-27 19:19:03,389 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5658, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=348, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5816, PETRI_PLACES=244, PETRI_TRANSITIONS=348} [2024-06-27 19:19:03,390 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 203 predicate places. [2024-06-27 19:19:03,390 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 348 transitions, 5816 flow [2024-06-27 19:19:03,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:03,390 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:19:03,390 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:19:03,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-27 19:19:03,390 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:19:03,391 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:19:03,391 INFO L85 PathProgramCache]: Analyzing trace with hash 370276726, now seen corresponding path program 2 times [2024-06-27 19:19:03,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:19:03,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691501898] [2024-06-27 19:19:03,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:19:03,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:19:03,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:19:03,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:19:03,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:19:03,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691501898] [2024-06-27 19:19:03,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691501898] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:19:03,486 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:19:03,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:19:03,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363126147] [2024-06-27 19:19:03,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:19:03,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:19:03,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:19:03,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:19:03,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:19:03,545 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:19:03,545 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 348 transitions, 5816 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:03,545 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:19:03,545 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:19:03,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:19:04,503 INFO L124 PetriNetUnfolderBase]: 3620/6180 cut-off events. [2024-06-27 19:19:04,503 INFO L125 PetriNetUnfolderBase]: For 342777/342781 co-relation queries the response was YES. [2024-06-27 19:19:04,547 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45406 conditions, 6180 events. 3620/6180 cut-off events. For 342777/342781 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 42958 event pairs, 1213 based on Foata normal form. 3/6178 useless extension candidates. Maximal degree in co-relation 45286. Up to 5509 conditions per place. [2024-06-27 19:19:04,569 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 252 selfloop transitions, 118 changer transitions 1/378 dead transitions. [2024-06-27 19:19:04,570 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 378 transitions, 6927 flow [2024-06-27 19:19:04,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:19:04,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:19:04,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-27 19:19:04,570 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6071428571428571 [2024-06-27 19:19:04,571 INFO L175 Difference]: Start difference. First operand has 244 places, 348 transitions, 5816 flow. Second operand 7 states and 170 transitions. [2024-06-27 19:19:04,571 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 378 transitions, 6927 flow [2024-06-27 19:19:05,459 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 378 transitions, 6791 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-27 19:19:05,464 INFO L231 Difference]: Finished difference. Result has 247 places, 358 transitions, 6235 flow [2024-06-27 19:19:05,464 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5680, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=348, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6235, PETRI_PLACES=247, PETRI_TRANSITIONS=358} [2024-06-27 19:19:05,464 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 206 predicate places. [2024-06-27 19:19:05,465 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 358 transitions, 6235 flow [2024-06-27 19:19:05,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:05,465 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:19:05,465 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:19:05,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-27 19:19:05,465 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:19:05,465 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:19:05,466 INFO L85 PathProgramCache]: Analyzing trace with hash 370513876, now seen corresponding path program 3 times [2024-06-27 19:19:05,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:19:05,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111513983] [2024-06-27 19:19:05,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:19:05,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:19:05,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:19:05,562 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:19:05,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:19:05,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111513983] [2024-06-27 19:19:05,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111513983] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:19:05,563 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:19:05,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:19:05,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670315154] [2024-06-27 19:19:05,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:19:05,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:19:05,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:19:05,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:19:05,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:19:05,604 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:19:05,605 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 358 transitions, 6235 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:05,605 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:19:05,605 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:19:05,605 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:19:06,582 INFO L124 PetriNetUnfolderBase]: 3613/6170 cut-off events. [2024-06-27 19:19:06,582 INFO L125 PetriNetUnfolderBase]: For 352700/352704 co-relation queries the response was YES. [2024-06-27 19:19:06,628 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45904 conditions, 6170 events. 3613/6170 cut-off events. For 352700/352704 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 42820 event pairs, 1219 based on Foata normal form. 2/6167 useless extension candidates. Maximal degree in co-relation 45781. Up to 5504 conditions per place. [2024-06-27 19:19:06,651 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 249 selfloop transitions, 118 changer transitions 2/376 dead transitions. [2024-06-27 19:19:06,651 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 376 transitions, 7036 flow [2024-06-27 19:19:06,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:19:06,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:19:06,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-06-27 19:19:06,652 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6035714285714285 [2024-06-27 19:19:06,652 INFO L175 Difference]: Start difference. First operand has 247 places, 358 transitions, 6235 flow. Second operand 7 states and 169 transitions. [2024-06-27 19:19:06,652 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 376 transitions, 7036 flow [2024-06-27 19:19:07,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 376 transitions, 6930 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-27 19:19:07,756 INFO L231 Difference]: Finished difference. Result has 250 places, 357 transitions, 6358 flow [2024-06-27 19:19:07,756 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6129, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=358, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6358, PETRI_PLACES=250, PETRI_TRANSITIONS=357} [2024-06-27 19:19:07,757 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 209 predicate places. [2024-06-27 19:19:07,757 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 357 transitions, 6358 flow [2024-06-27 19:19:07,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:07,757 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:19:07,757 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:19:07,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-27 19:19:07,757 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:19:07,758 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:19:07,758 INFO L85 PathProgramCache]: Analyzing trace with hash -335767544, now seen corresponding path program 1 times [2024-06-27 19:19:07,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:19:07,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810515227] [2024-06-27 19:19:07,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:19:07,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:19:07,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:19:07,877 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:19:07,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:19:07,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810515227] [2024-06-27 19:19:07,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810515227] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:19:07,878 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:19:07,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:19:07,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178209733] [2024-06-27 19:19:07,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:19:07,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:19:07,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:19:07,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:19:07,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:19:07,913 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:19:07,913 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 357 transitions, 6358 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:07,913 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:19:07,913 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:19:07,913 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:19:08,970 INFO L124 PetriNetUnfolderBase]: 3593/6140 cut-off events. [2024-06-27 19:19:08,971 INFO L125 PetriNetUnfolderBase]: For 340431/340435 co-relation queries the response was YES. [2024-06-27 19:19:09,012 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45378 conditions, 6140 events. 3593/6140 cut-off events. For 340431/340435 co-relation queries the response was YES. Maximal size of possible extension queue 346. Compared 42569 event pairs, 1057 based on Foata normal form. 7/6142 useless extension candidates. Maximal degree in co-relation 45255. Up to 5610 conditions per place. [2024-06-27 19:19:09,033 INFO L140 encePairwiseOnDemand]: 34/40 looper letters, 352 selfloop transitions, 17 changer transitions 0/376 dead transitions. [2024-06-27 19:19:09,033 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 376 transitions, 7153 flow [2024-06-27 19:19:09,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:19:09,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:19:09,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 137 transitions. [2024-06-27 19:19:09,034 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5708333333333333 [2024-06-27 19:19:09,034 INFO L175 Difference]: Start difference. First operand has 250 places, 357 transitions, 6358 flow. Second operand 6 states and 137 transitions. [2024-06-27 19:19:09,034 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 376 transitions, 7153 flow [2024-06-27 19:19:10,131 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 376 transitions, 6906 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-27 19:19:10,136 INFO L231 Difference]: Finished difference. Result has 250 places, 358 transitions, 6154 flow [2024-06-27 19:19:10,136 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6111, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=357, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=341, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6154, PETRI_PLACES=250, PETRI_TRANSITIONS=358} [2024-06-27 19:19:10,137 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 209 predicate places. [2024-06-27 19:19:10,137 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 358 transitions, 6154 flow [2024-06-27 19:19:10,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:10,137 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:19:10,137 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:19:10,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-27 19:19:10,137 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:19:10,138 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:19:10,138 INFO L85 PathProgramCache]: Analyzing trace with hash 370184470, now seen corresponding path program 2 times [2024-06-27 19:19:10,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:19:10,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350112621] [2024-06-27 19:19:10,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:19:10,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:19:10,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:19:10,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:19:10,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:19:10,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350112621] [2024-06-27 19:19:10,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350112621] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:19:10,238 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:19:10,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:19:10,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462319819] [2024-06-27 19:19:10,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:19:10,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:19:10,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:19:10,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:19:10,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:19:10,304 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:19:10,305 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 358 transitions, 6154 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:10,305 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:19:10,305 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:19:10,305 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:19:11,272 INFO L124 PetriNetUnfolderBase]: 3580/6121 cut-off events. [2024-06-27 19:19:11,272 INFO L125 PetriNetUnfolderBase]: For 331589/331593 co-relation queries the response was YES. [2024-06-27 19:19:11,316 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44725 conditions, 6121 events. 3580/6121 cut-off events. For 331589/331593 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 42428 event pairs, 1013 based on Foata normal form. 7/6123 useless extension candidates. Maximal degree in co-relation 44602. Up to 5515 conditions per place. [2024-06-27 19:19:11,337 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 341 selfloop transitions, 30 changer transitions 0/378 dead transitions. [2024-06-27 19:19:11,338 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 378 transitions, 6976 flow [2024-06-27 19:19:11,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:19:11,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:19:11,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 144 transitions. [2024-06-27 19:19:11,339 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-27 19:19:11,339 INFO L175 Difference]: Start difference. First operand has 250 places, 358 transitions, 6154 flow. Second operand 6 states and 144 transitions. [2024-06-27 19:19:11,339 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 378 transitions, 6976 flow [2024-06-27 19:19:12,247 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 378 transitions, 6899 flow, removed 17 selfloop flow, removed 4 redundant places. [2024-06-27 19:19:12,252 INFO L231 Difference]: Finished difference. Result has 252 places, 358 transitions, 6141 flow [2024-06-27 19:19:12,252 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6077, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=358, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=328, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6141, PETRI_PLACES=252, PETRI_TRANSITIONS=358} [2024-06-27 19:19:12,253 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 211 predicate places. [2024-06-27 19:19:12,253 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 358 transitions, 6141 flow [2024-06-27 19:19:12,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:12,253 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:19:12,253 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:19:12,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-27 19:19:12,253 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:19:12,253 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:19:12,254 INFO L85 PathProgramCache]: Analyzing trace with hash -733434214, now seen corresponding path program 3 times [2024-06-27 19:19:12,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:19:12,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641760528] [2024-06-27 19:19:12,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:19:12,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:19:12,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:19:12,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:19:12,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:19:12,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641760528] [2024-06-27 19:19:12,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641760528] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:19:12,336 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:19:12,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:19:12,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558834060] [2024-06-27 19:19:12,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:19:12,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:19:12,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:19:12,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:19:12,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:19:12,381 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:19:12,382 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 358 transitions, 6141 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:12,382 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:19:12,382 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:19:12,382 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:19:13,414 INFO L124 PetriNetUnfolderBase]: 3601/6152 cut-off events. [2024-06-27 19:19:13,414 INFO L125 PetriNetUnfolderBase]: For 339050/339054 co-relation queries the response was YES. [2024-06-27 19:19:13,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45265 conditions, 6152 events. 3601/6152 cut-off events. For 339050/339054 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 42716 event pairs, 1185 based on Foata normal form. 2/6149 useless extension candidates. Maximal degree in co-relation 45142. Up to 5335 conditions per place. [2024-06-27 19:19:13,476 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 234 selfloop transitions, 155 changer transitions 0/396 dead transitions. [2024-06-27 19:19:13,477 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 396 transitions, 7371 flow [2024-06-27 19:19:13,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:19:13,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:19:13,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 237 transitions. [2024-06-27 19:19:13,478 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5925 [2024-06-27 19:19:13,478 INFO L175 Difference]: Start difference. First operand has 252 places, 358 transitions, 6141 flow. Second operand 10 states and 237 transitions. [2024-06-27 19:19:13,478 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 396 transitions, 7371 flow [2024-06-27 19:19:14,362 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 396 transitions, 7305 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-27 19:19:14,367 INFO L231 Difference]: Finished difference. Result has 259 places, 364 transitions, 6552 flow [2024-06-27 19:19:14,368 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6075, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=358, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=151, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6552, PETRI_PLACES=259, PETRI_TRANSITIONS=364} [2024-06-27 19:19:14,368 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 218 predicate places. [2024-06-27 19:19:14,368 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 364 transitions, 6552 flow [2024-06-27 19:19:14,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:14,368 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:19:14,369 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:19:14,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-27 19:19:14,369 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:19:14,369 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:19:14,369 INFO L85 PathProgramCache]: Analyzing trace with hash -733314058, now seen corresponding path program 4 times [2024-06-27 19:19:14,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:19:14,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804302020] [2024-06-27 19:19:14,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:19:14,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:19:14,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:19:14,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:19:14,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:19:14,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804302020] [2024-06-27 19:19:14,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804302020] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:19:14,473 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:19:14,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:19:14,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343567501] [2024-06-27 19:19:14,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:19:14,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:19:14,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:19:14,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:19:14,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:19:14,515 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:19:14,515 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 364 transitions, 6552 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:14,515 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:19:14,515 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:19:14,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:19:15,527 INFO L124 PetriNetUnfolderBase]: 3626/6205 cut-off events. [2024-06-27 19:19:15,527 INFO L125 PetriNetUnfolderBase]: For 358803/358807 co-relation queries the response was YES. [2024-06-27 19:19:15,572 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47208 conditions, 6205 events. 3626/6205 cut-off events. For 358803/358807 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 43185 event pairs, 1205 based on Foata normal form. 3/6203 useless extension candidates. Maximal degree in co-relation 47083. Up to 5623 conditions per place. [2024-06-27 19:19:15,594 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 333 selfloop transitions, 51 changer transitions 2/393 dead transitions. [2024-06-27 19:19:15,595 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 393 transitions, 7512 flow [2024-06-27 19:19:15,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:19:15,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:19:15,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 180 transitions. [2024-06-27 19:19:15,596 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5625 [2024-06-27 19:19:15,596 INFO L175 Difference]: Start difference. First operand has 259 places, 364 transitions, 6552 flow. Second operand 8 states and 180 transitions. [2024-06-27 19:19:15,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 393 transitions, 7512 flow [2024-06-27 19:19:16,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 393 transitions, 7253 flow, removed 45 selfloop flow, removed 6 redundant places. [2024-06-27 19:19:16,689 INFO L231 Difference]: Finished difference. Result has 262 places, 373 transitions, 6542 flow [2024-06-27 19:19:16,690 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6302, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=364, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=316, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6542, PETRI_PLACES=262, PETRI_TRANSITIONS=373} [2024-06-27 19:19:16,690 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 221 predicate places. [2024-06-27 19:19:16,690 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 373 transitions, 6542 flow [2024-06-27 19:19:16,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:16,690 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:19:16,690 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:19:16,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-27 19:19:16,691 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:19:16,691 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:19:16,691 INFO L85 PathProgramCache]: Analyzing trace with hash -728071834, now seen corresponding path program 4 times [2024-06-27 19:19:16,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:19:16,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224551181] [2024-06-27 19:19:16,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:19:16,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:19:16,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:19:16,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:19:16,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:19:16,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224551181] [2024-06-27 19:19:16,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224551181] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:19:16,774 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:19:16,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:19:16,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359604089] [2024-06-27 19:19:16,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:19:16,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:19:16,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:19:16,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:19:16,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:19:16,829 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:19:16,830 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 373 transitions, 6542 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:16,830 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:19:16,830 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:19:16,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:19:18,060 INFO L124 PetriNetUnfolderBase]: 3624/6195 cut-off events. [2024-06-27 19:19:18,060 INFO L125 PetriNetUnfolderBase]: For 364027/364031 co-relation queries the response was YES. [2024-06-27 19:19:18,095 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46489 conditions, 6195 events. 3624/6195 cut-off events. For 364027/364031 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 43034 event pairs, 1197 based on Foata normal form. 2/6192 useless extension candidates. Maximal degree in co-relation 46362. Up to 5355 conditions per place. [2024-06-27 19:19:18,115 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 221 selfloop transitions, 175 changer transitions 0/403 dead transitions. [2024-06-27 19:19:18,115 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 403 transitions, 7764 flow [2024-06-27 19:19:18,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:19:18,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:19:18,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 210 transitions. [2024-06-27 19:19:18,116 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-06-27 19:19:18,116 INFO L175 Difference]: Start difference. First operand has 262 places, 373 transitions, 6542 flow. Second operand 9 states and 210 transitions. [2024-06-27 19:19:18,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 403 transitions, 7764 flow [2024-06-27 19:19:19,037 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 403 transitions, 7642 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-27 19:19:19,042 INFO L231 Difference]: Finished difference. Result has 266 places, 379 transitions, 6934 flow [2024-06-27 19:19:19,043 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6420, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=373, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=170, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6934, PETRI_PLACES=266, PETRI_TRANSITIONS=379} [2024-06-27 19:19:19,043 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 225 predicate places. [2024-06-27 19:19:19,043 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 379 transitions, 6934 flow [2024-06-27 19:19:19,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:19,043 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:19:19,044 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:19:19,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-27 19:19:19,044 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:19:19,044 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:19:19,044 INFO L85 PathProgramCache]: Analyzing trace with hash -2075209590, now seen corresponding path program 1 times [2024-06-27 19:19:19,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:19:19,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155228451] [2024-06-27 19:19:19,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:19:19,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:19:19,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:19:19,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:19:19,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:19:19,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155228451] [2024-06-27 19:19:19,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155228451] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:19:19,137 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:19:19,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:19:19,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984633813] [2024-06-27 19:19:19,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:19:19,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:19:19,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:19:19,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:19:19,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:19:19,184 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:19:19,184 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 379 transitions, 6934 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:19,184 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:19:19,184 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:19:19,184 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:19:20,196 INFO L124 PetriNetUnfolderBase]: 3618/6194 cut-off events. [2024-06-27 19:19:20,197 INFO L125 PetriNetUnfolderBase]: For 375849/375856 co-relation queries the response was YES. [2024-06-27 19:19:20,244 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46880 conditions, 6194 events. 3618/6194 cut-off events. For 375849/375856 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 43090 event pairs, 1194 based on Foata normal form. 8/6199 useless extension candidates. Maximal degree in co-relation 46752. Up to 5567 conditions per place. [2024-06-27 19:19:20,266 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 288 selfloop transitions, 103 changer transitions 0/398 dead transitions. [2024-06-27 19:19:20,266 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 398 transitions, 7762 flow [2024-06-27 19:19:20,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:19:20,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:19:20,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 201 transitions. [2024-06-27 19:19:20,267 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5583333333333333 [2024-06-27 19:19:20,267 INFO L175 Difference]: Start difference. First operand has 266 places, 379 transitions, 6934 flow. Second operand 9 states and 201 transitions. [2024-06-27 19:19:20,267 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 398 transitions, 7762 flow [2024-06-27 19:19:21,362 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 398 transitions, 7516 flow, removed 53 selfloop flow, removed 4 redundant places. [2024-06-27 19:19:21,368 INFO L231 Difference]: Finished difference. Result has 271 places, 379 transitions, 6908 flow [2024-06-27 19:19:21,369 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6688, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=379, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6908, PETRI_PLACES=271, PETRI_TRANSITIONS=379} [2024-06-27 19:19:21,369 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 230 predicate places. [2024-06-27 19:19:21,369 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 379 transitions, 6908 flow [2024-06-27 19:19:21,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:21,369 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:19:21,369 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:19:21,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-27 19:19:21,370 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:19:21,370 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:19:21,370 INFO L85 PathProgramCache]: Analyzing trace with hash -727773304, now seen corresponding path program 5 times [2024-06-27 19:19:21,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:19:21,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989166612] [2024-06-27 19:19:21,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:19:21,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:19:21,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:19:21,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:19:21,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:19:21,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989166612] [2024-06-27 19:19:21,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989166612] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:19:21,452 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:19:21,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:19:21,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130178525] [2024-06-27 19:19:21,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:19:21,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:19:21,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:19:21,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:19:21,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:19:21,489 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:19:21,489 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 379 transitions, 6908 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:21,489 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:19:21,489 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:19:21,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:19:22,481 INFO L124 PetriNetUnfolderBase]: 3615/6183 cut-off events. [2024-06-27 19:19:22,481 INFO L125 PetriNetUnfolderBase]: For 384996/385000 co-relation queries the response was YES. [2024-06-27 19:19:22,527 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47104 conditions, 6183 events. 3615/6183 cut-off events. For 384996/385000 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 43031 event pairs, 1198 based on Foata normal form. 2/6180 useless extension candidates. Maximal degree in co-relation 46974. Up to 5349 conditions per place. [2024-06-27 19:19:22,548 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 218 selfloop transitions, 174 changer transitions 0/399 dead transitions. [2024-06-27 19:19:22,549 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 399 transitions, 7852 flow [2024-06-27 19:19:22,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:19:22,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:19:22,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 207 transitions. [2024-06-27 19:19:22,550 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.575 [2024-06-27 19:19:22,550 INFO L175 Difference]: Start difference. First operand has 271 places, 379 transitions, 6908 flow. Second operand 9 states and 207 transitions. [2024-06-27 19:19:22,550 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 399 transitions, 7852 flow [2024-06-27 19:19:23,617 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 399 transitions, 7525 flow, removed 41 selfloop flow, removed 9 redundant places. [2024-06-27 19:19:23,623 INFO L231 Difference]: Finished difference. Result has 271 places, 379 transitions, 6938 flow [2024-06-27 19:19:23,624 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6583, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=379, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=174, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6938, PETRI_PLACES=271, PETRI_TRANSITIONS=379} [2024-06-27 19:19:23,624 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 230 predicate places. [2024-06-27 19:19:23,624 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 379 transitions, 6938 flow [2024-06-27 19:19:23,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:23,624 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:19:23,624 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:19:23,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-27 19:19:23,625 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:19:23,625 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:19:23,625 INFO L85 PathProgramCache]: Analyzing trace with hash -413777988, now seen corresponding path program 5 times [2024-06-27 19:19:23,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:19:23,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551425779] [2024-06-27 19:19:23,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:19:23,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:19:23,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:19:23,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:19:23,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:19:23,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551425779] [2024-06-27 19:19:23,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551425779] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:19:23,735 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:19:23,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:19:23,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61501465] [2024-06-27 19:19:23,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:19:23,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:19:23,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:19:23,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:19:23,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:19:23,781 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:19:23,781 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 379 transitions, 6938 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:23,781 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:19:23,781 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:19:23,781 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:19:24,759 INFO L124 PetriNetUnfolderBase]: 3663/6271 cut-off events. [2024-06-27 19:19:24,759 INFO L125 PetriNetUnfolderBase]: For 390369/390373 co-relation queries the response was YES. [2024-06-27 19:19:24,806 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47990 conditions, 6271 events. 3663/6271 cut-off events. For 390369/390373 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 43754 event pairs, 1202 based on Foata normal form. 3/6269 useless extension candidates. Maximal degree in co-relation 47860. Up to 5602 conditions per place. [2024-06-27 19:19:24,829 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 313 selfloop transitions, 92 changer transitions 1/413 dead transitions. [2024-06-27 19:19:24,829 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 413 transitions, 8218 flow [2024-06-27 19:19:24,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:19:24,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:19:24,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 184 transitions. [2024-06-27 19:19:24,830 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.575 [2024-06-27 19:19:24,830 INFO L175 Difference]: Start difference. First operand has 271 places, 379 transitions, 6938 flow. Second operand 8 states and 184 transitions. [2024-06-27 19:19:24,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 413 transitions, 8218 flow [2024-06-27 19:19:25,927 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 413 transitions, 7811 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-27 19:19:25,933 INFO L231 Difference]: Finished difference. Result has 273 places, 396 transitions, 7111 flow [2024-06-27 19:19:25,934 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6570, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=379, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7111, PETRI_PLACES=273, PETRI_TRANSITIONS=396} [2024-06-27 19:19:25,934 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 232 predicate places. [2024-06-27 19:19:25,934 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 396 transitions, 7111 flow [2024-06-27 19:19:25,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:25,934 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:19:25,934 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:19:25,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-27 19:19:25,935 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:19:25,935 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:19:25,935 INFO L85 PathProgramCache]: Analyzing trace with hash -413789148, now seen corresponding path program 6 times [2024-06-27 19:19:25,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:19:25,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299271950] [2024-06-27 19:19:25,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:19:25,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:19:25,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:19:26,044 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 19:19:26,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:19:26,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299271950] [2024-06-27 19:19:26,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299271950] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:19:26,044 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:19:26,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:19:26,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243901449] [2024-06-27 19:19:26,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:19:26,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:19:26,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:19:26,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:19:26,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:19:26,107 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:19:26,107 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 396 transitions, 7111 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:26,107 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:19:26,107 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:19:26,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:19:27,175 INFO L124 PetriNetUnfolderBase]: 3653/6253 cut-off events. [2024-06-27 19:19:27,175 INFO L125 PetriNetUnfolderBase]: For 398402/398406 co-relation queries the response was YES. [2024-06-27 19:19:27,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47841 conditions, 6253 events. 3653/6253 cut-off events. For 398402/398406 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 43609 event pairs, 1200 based on Foata normal form. 3/6251 useless extension candidates. Maximal degree in co-relation 47708. Up to 5594 conditions per place. [2024-06-27 19:19:27,246 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 316 selfloop transitions, 87 changer transitions 2/412 dead transitions. [2024-06-27 19:19:27,247 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 412 transitions, 7959 flow [2024-06-27 19:19:27,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:19:27,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:19:27,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 200 transitions. [2024-06-27 19:19:27,255 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5555555555555556 [2024-06-27 19:19:27,255 INFO L175 Difference]: Start difference. First operand has 273 places, 396 transitions, 7111 flow. Second operand 9 states and 200 transitions. [2024-06-27 19:19:27,255 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 412 transitions, 7959 flow [2024-06-27 19:19:28,453 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 412 transitions, 7898 flow, removed 25 selfloop flow, removed 1 redundant places. [2024-06-27 19:19:28,460 INFO L231 Difference]: Finished difference. Result has 281 places, 394 transitions, 7199 flow [2024-06-27 19:19:28,460 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7050, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=396, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=309, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7199, PETRI_PLACES=281, PETRI_TRANSITIONS=394} [2024-06-27 19:19:28,460 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 240 predicate places. [2024-06-27 19:19:28,460 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 394 transitions, 7199 flow [2024-06-27 19:19:28,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:28,461 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:19:28,461 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:19:28,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-27 19:19:28,461 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:19:28,461 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:19:28,461 INFO L85 PathProgramCache]: Analyzing trace with hash 705838400, now seen corresponding path program 7 times [2024-06-27 19:19:28,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:19:28,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128015128] [2024-06-27 19:19:28,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:19:28,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:19:28,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:19:28,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:19:28,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:19:28,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128015128] [2024-06-27 19:19:28,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128015128] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:19:28,552 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:19:28,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:19:28,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092559688] [2024-06-27 19:19:28,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:19:28,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:19:28,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:19:28,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:19:28,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:19:28,580 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:19:28,580 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 394 transitions, 7199 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:28,580 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:19:28,580 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:19:28,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:19:29,621 INFO L124 PetriNetUnfolderBase]: 3651/6258 cut-off events. [2024-06-27 19:19:29,622 INFO L125 PetriNetUnfolderBase]: For 411629/411636 co-relation queries the response was YES. [2024-06-27 19:19:29,663 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48234 conditions, 6258 events. 3651/6258 cut-off events. For 411629/411636 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 43757 event pairs, 1233 based on Foata normal form. 4/6254 useless extension candidates. Maximal degree in co-relation 48099. Up to 5431 conditions per place. [2024-06-27 19:19:29,684 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 253 selfloop transitions, 152 changer transitions 1/413 dead transitions. [2024-06-27 19:19:29,684 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 413 transitions, 8343 flow [2024-06-27 19:19:29,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:19:29,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:19:29,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2024-06-27 19:19:29,685 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5928571428571429 [2024-06-27 19:19:29,685 INFO L175 Difference]: Start difference. First operand has 281 places, 394 transitions, 7199 flow. Second operand 7 states and 166 transitions. [2024-06-27 19:19:29,686 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 413 transitions, 8343 flow [2024-06-27 19:19:30,810 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 413 transitions, 8129 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-27 19:19:30,816 INFO L231 Difference]: Finished difference. Result has 280 places, 396 transitions, 7336 flow [2024-06-27 19:19:30,816 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6985, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=394, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=150, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7336, PETRI_PLACES=280, PETRI_TRANSITIONS=396} [2024-06-27 19:19:30,816 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 239 predicate places. [2024-06-27 19:19:30,816 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 396 transitions, 7336 flow [2024-06-27 19:19:30,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:30,817 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:19:30,817 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:19:30,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-27 19:19:30,817 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:19:30,817 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:19:30,817 INFO L85 PathProgramCache]: Analyzing trace with hash 705718430, now seen corresponding path program 8 times [2024-06-27 19:19:30,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:19:30,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171672726] [2024-06-27 19:19:30,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:19:30,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:19:30,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:19:30,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:19:30,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:19:30,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171672726] [2024-06-27 19:19:30,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171672726] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:19:30,918 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:19:30,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:19:30,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92868137] [2024-06-27 19:19:30,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:19:30,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:19:30,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:19:30,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:19:30,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:19:30,976 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:19:30,976 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 396 transitions, 7336 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:30,976 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:19:30,976 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:19:30,976 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:19:32,055 INFO L124 PetriNetUnfolderBase]: 3619/6198 cut-off events. [2024-06-27 19:19:32,055 INFO L125 PetriNetUnfolderBase]: For 419505/419509 co-relation queries the response was YES. [2024-06-27 19:19:32,101 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48167 conditions, 6198 events. 3619/6198 cut-off events. For 419505/419509 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 43126 event pairs, 1186 based on Foata normal form. 2/6195 useless extension candidates. Maximal degree in co-relation 48032. Up to 5686 conditions per place. [2024-06-27 19:19:32,126 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 370 selfloop transitions, 25 changer transitions 4/406 dead transitions. [2024-06-27 19:19:32,127 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 406 transitions, 8158 flow [2024-06-27 19:19:32,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:19:32,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:19:32,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 134 transitions. [2024-06-27 19:19:32,128 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5583333333333333 [2024-06-27 19:19:32,128 INFO L175 Difference]: Start difference. First operand has 280 places, 396 transitions, 7336 flow. Second operand 6 states and 134 transitions. [2024-06-27 19:19:32,128 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 406 transitions, 8158 flow [2024-06-27 19:19:33,565 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 406 transitions, 7828 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-27 19:19:33,570 INFO L231 Difference]: Finished difference. Result has 282 places, 392 transitions, 6975 flow [2024-06-27 19:19:33,571 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7006, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=396, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=371, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6975, PETRI_PLACES=282, PETRI_TRANSITIONS=392} [2024-06-27 19:19:33,571 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 241 predicate places. [2024-06-27 19:19:33,571 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 392 transitions, 6975 flow [2024-06-27 19:19:33,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:33,571 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:19:33,572 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:19:33,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-27 19:19:33,572 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:19:33,572 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:19:33,572 INFO L85 PathProgramCache]: Analyzing trace with hash 698486750, now seen corresponding path program 9 times [2024-06-27 19:19:33,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:19:33,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386486103] [2024-06-27 19:19:33,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:19:33,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:19:33,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:19:33,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:19:33,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:19:33,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386486103] [2024-06-27 19:19:33,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386486103] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:19:33,689 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:19:33,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:19:33,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371861812] [2024-06-27 19:19:33,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:19:33,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:19:33,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:19:33,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:19:33,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:19:33,730 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:19:33,731 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 392 transitions, 6975 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:33,731 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:19:33,731 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:19:33,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:19:34,887 INFO L124 PetriNetUnfolderBase]: 3546/6069 cut-off events. [2024-06-27 19:19:34,887 INFO L125 PetriNetUnfolderBase]: For 430961/430965 co-relation queries the response was YES. [2024-06-27 19:19:34,925 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47445 conditions, 6069 events. 3546/6069 cut-off events. For 430961/430965 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 41978 event pairs, 1146 based on Foata normal form. 3/6067 useless extension candidates. Maximal degree in co-relation 47309. Up to 5251 conditions per place. [2024-06-27 19:19:34,946 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 248 selfloop transitions, 159 changer transitions 1/415 dead transitions. [2024-06-27 19:19:34,946 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 415 transitions, 8045 flow [2024-06-27 19:19:34,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:19:34,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:19:34,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 189 transitions. [2024-06-27 19:19:34,947 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.590625 [2024-06-27 19:19:34,947 INFO L175 Difference]: Start difference. First operand has 282 places, 392 transitions, 6975 flow. Second operand 8 states and 189 transitions. [2024-06-27 19:19:34,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 415 transitions, 8045 flow [2024-06-27 19:19:36,123 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 415 transitions, 7754 flow, removed 7 selfloop flow, removed 9 redundant places. [2024-06-27 19:19:36,129 INFO L231 Difference]: Finished difference. Result has 281 places, 395 transitions, 7081 flow [2024-06-27 19:19:36,129 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6684, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=392, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=156, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7081, PETRI_PLACES=281, PETRI_TRANSITIONS=395} [2024-06-27 19:19:36,129 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 240 predicate places. [2024-06-27 19:19:36,129 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 395 transitions, 7081 flow [2024-06-27 19:19:36,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:36,130 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:19:36,130 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:19:36,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-27 19:19:36,130 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:19:36,130 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:19:36,130 INFO L85 PathProgramCache]: Analyzing trace with hash 698475590, now seen corresponding path program 10 times [2024-06-27 19:19:36,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:19:36,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588697177] [2024-06-27 19:19:36,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:19:36,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:19:36,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:19:36,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:19:36,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:19:36,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588697177] [2024-06-27 19:19:36,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588697177] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:19:36,217 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:19:36,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:19:36,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320400865] [2024-06-27 19:19:36,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:19:36,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:19:36,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:19:36,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:19:36,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:19:36,254 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:19:36,254 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 395 transitions, 7081 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:36,254 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:19:36,254 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:19:36,254 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:19:37,253 INFO L124 PetriNetUnfolderBase]: 3511/6008 cut-off events. [2024-06-27 19:19:37,253 INFO L125 PetriNetUnfolderBase]: For 439775/439779 co-relation queries the response was YES. [2024-06-27 19:19:37,299 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47103 conditions, 6008 events. 3511/6008 cut-off events. For 439775/439779 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 41390 event pairs, 1130 based on Foata normal form. 3/6006 useless extension candidates. Maximal degree in co-relation 46969. Up to 5192 conditions per place. [2024-06-27 19:19:37,321 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 252 selfloop transitions, 159 changer transitions 2/420 dead transitions. [2024-06-27 19:19:37,321 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 420 transitions, 7969 flow [2024-06-27 19:19:37,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:19:37,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:19:37,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 212 transitions. [2024-06-27 19:19:37,322 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5888888888888889 [2024-06-27 19:19:37,322 INFO L175 Difference]: Start difference. First operand has 281 places, 395 transitions, 7081 flow. Second operand 9 states and 212 transitions. [2024-06-27 19:19:37,322 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 420 transitions, 7969 flow [2024-06-27 19:19:38,496 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 420 transitions, 7541 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-27 19:19:38,502 INFO L231 Difference]: Finished difference. Result has 283 places, 393 transitions, 6962 flow [2024-06-27 19:19:38,502 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6653, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=395, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=159, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6962, PETRI_PLACES=283, PETRI_TRANSITIONS=393} [2024-06-27 19:19:38,503 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 242 predicate places. [2024-06-27 19:19:38,503 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 393 transitions, 6962 flow [2024-06-27 19:19:38,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:38,503 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:19:38,503 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:19:38,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-27 19:19:38,503 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:19:38,504 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:19:38,504 INFO L85 PathProgramCache]: Analyzing trace with hash -347037844, now seen corresponding path program 6 times [2024-06-27 19:19:38,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:19:38,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148417669] [2024-06-27 19:19:38,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:19:38,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:19:38,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:19:38,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:19:38,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:19:38,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148417669] [2024-06-27 19:19:38,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148417669] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:19:38,581 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:19:38,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:19:38,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699570208] [2024-06-27 19:19:38,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:19:38,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:19:38,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:19:38,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:19:38,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:19:38,630 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:19:38,631 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 393 transitions, 6962 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:38,632 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:19:38,632 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:19:38,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:19:39,595 INFO L124 PetriNetUnfolderBase]: 3449/5905 cut-off events. [2024-06-27 19:19:39,596 INFO L125 PetriNetUnfolderBase]: For 453032/453036 co-relation queries the response was YES. [2024-06-27 19:19:39,638 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46977 conditions, 5905 events. 3449/5905 cut-off events. For 453032/453036 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 40523 event pairs, 1097 based on Foata normal form. 2/5902 useless extension candidates. Maximal degree in co-relation 46842. Up to 4889 conditions per place. [2024-06-27 19:19:39,658 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 203 selfloop transitions, 224 changer transitions 0/434 dead transitions. [2024-06-27 19:19:39,658 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 434 transitions, 8556 flow [2024-06-27 19:19:39,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:19:39,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:19:39,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-27 19:19:39,660 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.615625 [2024-06-27 19:19:39,660 INFO L175 Difference]: Start difference. First operand has 283 places, 393 transitions, 6962 flow. Second operand 8 states and 197 transitions. [2024-06-27 19:19:39,660 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 434 transitions, 8556 flow [2024-06-27 19:19:40,931 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 434 transitions, 8092 flow, removed 12 selfloop flow, removed 12 redundant places. [2024-06-27 19:19:40,937 INFO L231 Difference]: Finished difference. Result has 280 places, 407 transitions, 7420 flow [2024-06-27 19:19:40,938 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6516, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=393, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=214, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7420, PETRI_PLACES=280, PETRI_TRANSITIONS=407} [2024-06-27 19:19:40,938 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 239 predicate places. [2024-06-27 19:19:40,938 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 407 transitions, 7420 flow [2024-06-27 19:19:40,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:40,938 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:19:40,938 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:19:40,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-27 19:19:40,939 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:19:40,939 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:19:40,939 INFO L85 PathProgramCache]: Analyzing trace with hash 1307766168, now seen corresponding path program 7 times [2024-06-27 19:19:40,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:19:40,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327670923] [2024-06-27 19:19:40,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:19:40,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:19:40,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:19:41,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:19:41,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:19:41,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327670923] [2024-06-27 19:19:41,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327670923] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:19:41,025 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:19:41,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:19:41,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313273824] [2024-06-27 19:19:41,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:19:41,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:19:41,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:19:41,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:19:41,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:19:41,067 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:19:41,067 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 407 transitions, 7420 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:41,067 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:19:41,067 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:19:41,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:19:42,010 INFO L124 PetriNetUnfolderBase]: 3454/5913 cut-off events. [2024-06-27 19:19:42,011 INFO L125 PetriNetUnfolderBase]: For 434379/434383 co-relation queries the response was YES. [2024-06-27 19:19:42,051 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47889 conditions, 5913 events. 3454/5913 cut-off events. For 434379/434383 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 40595 event pairs, 1098 based on Foata normal form. 2/5910 useless extension candidates. Maximal degree in co-relation 47755. Up to 4893 conditions per place. [2024-06-27 19:19:42,071 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 203 selfloop transitions, 224 changer transitions 0/434 dead transitions. [2024-06-27 19:19:42,072 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 434 transitions, 8781 flow [2024-06-27 19:19:42,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:19:42,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:19:42,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-27 19:19:42,073 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.60625 [2024-06-27 19:19:42,073 INFO L175 Difference]: Start difference. First operand has 280 places, 407 transitions, 7420 flow. Second operand 8 states and 194 transitions. [2024-06-27 19:19:42,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 434 transitions, 8781 flow [2024-06-27 19:19:43,325 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 434 transitions, 8445 flow, removed 83 selfloop flow, removed 4 redundant places. [2024-06-27 19:19:43,331 INFO L231 Difference]: Finished difference. Result has 284 places, 410 transitions, 7627 flow [2024-06-27 19:19:43,331 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7110, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=407, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=221, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7627, PETRI_PLACES=284, PETRI_TRANSITIONS=410} [2024-06-27 19:19:43,332 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 243 predicate places. [2024-06-27 19:19:43,332 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 410 transitions, 7627 flow [2024-06-27 19:19:43,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:43,332 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:19:43,332 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:19:43,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-27 19:19:43,332 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:19:43,333 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:19:43,333 INFO L85 PathProgramCache]: Analyzing trace with hash -346738942, now seen corresponding path program 2 times [2024-06-27 19:19:43,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:19:43,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177300730] [2024-06-27 19:19:43,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:19:43,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:19:43,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:19:43,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:19:43,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:19:43,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177300730] [2024-06-27 19:19:43,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177300730] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:19:43,419 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:19:43,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:19:43,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259822887] [2024-06-27 19:19:43,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:19:43,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:19:43,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:19:43,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:19:43,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:19:43,449 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:19:43,450 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 410 transitions, 7627 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:43,450 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:19:43,450 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:19:43,450 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:19:44,442 INFO L124 PetriNetUnfolderBase]: 3459/5919 cut-off events. [2024-06-27 19:19:44,442 INFO L125 PetriNetUnfolderBase]: For 441610/441617 co-relation queries the response was YES. [2024-06-27 19:19:44,485 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47002 conditions, 5919 events. 3459/5919 cut-off events. For 441610/441617 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 40576 event pairs, 1086 based on Foata normal form. 7/5923 useless extension candidates. Maximal degree in co-relation 46868. Up to 5197 conditions per place. [2024-06-27 19:19:44,505 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 285 selfloop transitions, 144 changer transitions 0/436 dead transitions. [2024-06-27 19:19:44,506 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 436 transitions, 8860 flow [2024-06-27 19:19:44,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:19:44,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:19:44,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 188 transitions. [2024-06-27 19:19:44,507 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5875 [2024-06-27 19:19:44,507 INFO L175 Difference]: Start difference. First operand has 284 places, 410 transitions, 7627 flow. Second operand 8 states and 188 transitions. [2024-06-27 19:19:44,507 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 436 transitions, 8860 flow [2024-06-27 19:19:45,791 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 436 transitions, 8383 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-27 19:19:45,797 INFO L231 Difference]: Finished difference. Result has 287 places, 413 transitions, 7519 flow [2024-06-27 19:19:45,798 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7154, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=410, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7519, PETRI_PLACES=287, PETRI_TRANSITIONS=413} [2024-06-27 19:19:45,798 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 246 predicate places. [2024-06-27 19:19:45,798 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 413 transitions, 7519 flow [2024-06-27 19:19:45,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:45,798 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:19:45,799 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:19:45,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-27 19:19:45,799 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:19:45,799 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:19:45,799 INFO L85 PathProgramCache]: Analyzing trace with hash 957789780, now seen corresponding path program 3 times [2024-06-27 19:19:45,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:19:45,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105812610] [2024-06-27 19:19:45,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:19:45,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:19:45,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:19:45,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:19:45,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:19:45,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105812610] [2024-06-27 19:19:45,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105812610] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:19:45,882 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:19:45,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:19:45,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43739976] [2024-06-27 19:19:45,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:19:45,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:19:45,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:19:45,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:19:45,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:19:45,922 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:19:45,922 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 413 transitions, 7519 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:45,922 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:19:45,923 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:19:45,923 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:19:46,892 INFO L124 PetriNetUnfolderBase]: 3464/5932 cut-off events. [2024-06-27 19:19:46,893 INFO L125 PetriNetUnfolderBase]: For 453036/453043 co-relation queries the response was YES. [2024-06-27 19:19:46,937 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47058 conditions, 5932 events. 3464/5932 cut-off events. For 453036/453043 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 40702 event pairs, 1089 based on Foata normal form. 7/5936 useless extension candidates. Maximal degree in co-relation 46923. Up to 5203 conditions per place. [2024-06-27 19:19:46,959 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 283 selfloop transitions, 147 changer transitions 0/437 dead transitions. [2024-06-27 19:19:46,959 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 437 transitions, 8878 flow [2024-06-27 19:19:46,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:19:46,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:19:46,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 186 transitions. [2024-06-27 19:19:46,960 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.58125 [2024-06-27 19:19:46,960 INFO L175 Difference]: Start difference. First operand has 287 places, 413 transitions, 7519 flow. Second operand 8 states and 186 transitions. [2024-06-27 19:19:46,960 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 437 transitions, 8878 flow [2024-06-27 19:19:48,349 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 437 transitions, 8534 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-27 19:19:48,355 INFO L231 Difference]: Finished difference. Result has 289 places, 416 transitions, 7552 flow [2024-06-27 19:19:48,355 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7181, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=413, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7552, PETRI_PLACES=289, PETRI_TRANSITIONS=416} [2024-06-27 19:19:48,356 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 248 predicate places. [2024-06-27 19:19:48,356 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 416 transitions, 7552 flow [2024-06-27 19:19:48,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:48,356 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:19:48,356 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:19:48,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-27 19:19:48,356 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:19:48,357 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:19:48,357 INFO L85 PathProgramCache]: Analyzing trace with hash 2038336406, now seen corresponding path program 8 times [2024-06-27 19:19:48,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:19:48,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910746604] [2024-06-27 19:19:48,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:19:48,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:19:48,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:19:48,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:19:48,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:19:48,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910746604] [2024-06-27 19:19:48,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910746604] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:19:48,433 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:19:48,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:19:48,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181234449] [2024-06-27 19:19:48,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:19:48,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:19:48,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:19:48,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:19:48,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:19:48,468 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:19:48,468 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 416 transitions, 7552 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:48,468 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:19:48,468 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:19:48,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:19:49,449 INFO L124 PetriNetUnfolderBase]: 3469/5939 cut-off events. [2024-06-27 19:19:49,449 INFO L125 PetriNetUnfolderBase]: For 466414/466418 co-relation queries the response was YES. [2024-06-27 19:19:49,492 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47292 conditions, 5939 events. 3469/5939 cut-off events. For 466414/466418 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 40747 event pairs, 1097 based on Foata normal form. 2/5936 useless extension candidates. Maximal degree in co-relation 47156. Up to 4905 conditions per place. [2024-06-27 19:19:49,513 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 198 selfloop transitions, 234 changer transitions 0/439 dead transitions. [2024-06-27 19:19:49,513 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 439 transitions, 8782 flow [2024-06-27 19:19:49,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:19:49,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:19:49,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 188 transitions. [2024-06-27 19:19:49,514 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5875 [2024-06-27 19:19:49,514 INFO L175 Difference]: Start difference. First operand has 289 places, 416 transitions, 7552 flow. Second operand 8 states and 188 transitions. [2024-06-27 19:19:49,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 439 transitions, 8782 flow [2024-06-27 19:19:50,954 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 439 transitions, 8303 flow, removed 37 selfloop flow, removed 7 redundant places. [2024-06-27 19:19:50,961 INFO L231 Difference]: Finished difference. Result has 290 places, 419 transitions, 7613 flow [2024-06-27 19:19:50,961 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7073, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=416, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=231, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7613, PETRI_PLACES=290, PETRI_TRANSITIONS=419} [2024-06-27 19:19:50,961 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 249 predicate places. [2024-06-27 19:19:50,961 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 419 transitions, 7613 flow [2024-06-27 19:19:50,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:50,962 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:19:50,962 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:19:50,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-27 19:19:50,962 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:19:50,962 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:19:50,962 INFO L85 PathProgramCache]: Analyzing trace with hash 1068674858, now seen corresponding path program 4 times [2024-06-27 19:19:50,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:19:50,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469279644] [2024-06-27 19:19:50,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:19:50,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:19:50,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:19:51,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:19:51,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:19:51,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469279644] [2024-06-27 19:19:51,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469279644] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:19:51,047 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:19:51,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:19:51,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190663264] [2024-06-27 19:19:51,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:19:51,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:19:51,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:19:51,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:19:51,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:19:51,079 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:19:51,080 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 419 transitions, 7613 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:51,080 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:19:51,080 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:19:51,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:19:52,156 INFO L124 PetriNetUnfolderBase]: 3466/5937 cut-off events. [2024-06-27 19:19:52,156 INFO L125 PetriNetUnfolderBase]: For 478239/478246 co-relation queries the response was YES. [2024-06-27 19:19:52,196 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47215 conditions, 5937 events. 3466/5937 cut-off events. For 478239/478246 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 40809 event pairs, 1089 based on Foata normal form. 7/5941 useless extension candidates. Maximal degree in co-relation 47080. Up to 5207 conditions per place. [2024-06-27 19:19:52,217 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 285 selfloop transitions, 147 changer transitions 0/439 dead transitions. [2024-06-27 19:19:52,217 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 439 transitions, 8781 flow [2024-06-27 19:19:52,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:19:52,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:19:52,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 184 transitions. [2024-06-27 19:19:52,218 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.575 [2024-06-27 19:19:52,218 INFO L175 Difference]: Start difference. First operand has 290 places, 419 transitions, 7613 flow. Second operand 8 states and 184 transitions. [2024-06-27 19:19:52,218 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 439 transitions, 8781 flow [2024-06-27 19:19:53,601 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 439 transitions, 8493 flow, removed 33 selfloop flow, removed 4 redundant places. [2024-06-27 19:19:53,607 INFO L231 Difference]: Finished difference. Result has 294 places, 419 transitions, 7625 flow [2024-06-27 19:19:53,623 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7325, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=419, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7625, PETRI_PLACES=294, PETRI_TRANSITIONS=419} [2024-06-27 19:19:53,623 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 253 predicate places. [2024-06-27 19:19:53,624 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 419 transitions, 7625 flow [2024-06-27 19:19:53,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:53,624 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:19:53,624 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:19:53,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-27 19:19:53,624 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:19:53,624 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:19:53,624 INFO L85 PathProgramCache]: Analyzing trace with hash 946629308, now seen corresponding path program 11 times [2024-06-27 19:19:53,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:19:53,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553377502] [2024-06-27 19:19:53,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:19:53,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:19:53,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:19:53,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:19:53,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:19:53,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553377502] [2024-06-27 19:19:53,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553377502] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:19:53,700 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:19:53,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:19:53,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338974188] [2024-06-27 19:19:53,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:19:53,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:19:53,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:19:53,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:19:53,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:19:53,736 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:19:53,736 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 419 transitions, 7625 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:53,737 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:19:53,737 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:19:53,737 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:19:54,806 INFO L124 PetriNetUnfolderBase]: 3508/6000 cut-off events. [2024-06-27 19:19:54,806 INFO L125 PetriNetUnfolderBase]: For 504193/504197 co-relation queries the response was YES. [2024-06-27 19:19:54,857 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48056 conditions, 6000 events. 3508/6000 cut-off events. For 504193/504197 co-relation queries the response was YES. Maximal size of possible extension queue 346. Compared 41163 event pairs, 1093 based on Foata normal form. 3/5998 useless extension candidates. Maximal degree in co-relation 47920. Up to 5273 conditions per place. [2024-06-27 19:19:54,882 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 332 selfloop transitions, 112 changer transitions 0/451 dead transitions. [2024-06-27 19:19:54,882 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 451 transitions, 9095 flow [2024-06-27 19:19:54,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:19:54,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:19:54,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 204 transitions. [2024-06-27 19:19:54,883 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5666666666666667 [2024-06-27 19:19:54,883 INFO L175 Difference]: Start difference. First operand has 294 places, 419 transitions, 7625 flow. Second operand 9 states and 204 transitions. [2024-06-27 19:19:54,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 451 transitions, 9095 flow [2024-06-27 19:19:56,609 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 451 transitions, 8685 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-27 19:19:56,616 INFO L231 Difference]: Finished difference. Result has 296 places, 433 transitions, 7790 flow [2024-06-27 19:19:56,616 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7215, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=419, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=310, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7790, PETRI_PLACES=296, PETRI_TRANSITIONS=433} [2024-06-27 19:19:56,616 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 255 predicate places. [2024-06-27 19:19:56,616 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 433 transitions, 7790 flow [2024-06-27 19:19:56,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:56,617 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:19:56,617 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:19:56,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-27 19:19:56,617 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:19:56,617 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:19:56,617 INFO L85 PathProgramCache]: Analyzing trace with hash -870558362, now seen corresponding path program 5 times [2024-06-27 19:19:56,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:19:56,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173278093] [2024-06-27 19:19:56,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:19:56,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:19:56,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:19:56,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:19:56,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:19:56,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173278093] [2024-06-27 19:19:56,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173278093] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:19:56,710 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:19:56,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:19:56,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966638320] [2024-06-27 19:19:56,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:19:56,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:19:56,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:19:56,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:19:56,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:19:56,753 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:19:56,753 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 433 transitions, 7790 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:56,753 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:19:56,754 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:19:56,754 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:19:57,874 INFO L124 PetriNetUnfolderBase]: 3505/6004 cut-off events. [2024-06-27 19:19:57,874 INFO L125 PetriNetUnfolderBase]: For 512865/512872 co-relation queries the response was YES. [2024-06-27 19:19:57,910 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48199 conditions, 6004 events. 3505/6004 cut-off events. For 512865/512872 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 41358 event pairs, 1086 based on Foata normal form. 7/6008 useless extension candidates. Maximal degree in co-relation 48061. Up to 5408 conditions per place. [2024-06-27 19:19:57,929 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 382 selfloop transitions, 61 changer transitions 0/450 dead transitions. [2024-06-27 19:19:57,929 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 450 transitions, 8848 flow [2024-06-27 19:19:57,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:19:57,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:19:57,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 197 transitions. [2024-06-27 19:19:57,930 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5472222222222223 [2024-06-27 19:19:57,930 INFO L175 Difference]: Start difference. First operand has 296 places, 433 transitions, 7790 flow. Second operand 9 states and 197 transitions. [2024-06-27 19:19:57,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 450 transitions, 8848 flow [2024-06-27 19:19:59,666 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 450 transitions, 8708 flow, removed 39 selfloop flow, removed 4 redundant places. [2024-06-27 19:19:59,673 INFO L231 Difference]: Finished difference. Result has 301 places, 433 transitions, 7778 flow [2024-06-27 19:19:59,673 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7650, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=433, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=372, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7778, PETRI_PLACES=301, PETRI_TRANSITIONS=433} [2024-06-27 19:19:59,673 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 260 predicate places. [2024-06-27 19:19:59,673 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 433 transitions, 7778 flow [2024-06-27 19:19:59,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:59,674 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:19:59,674 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:19:59,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-27 19:19:59,674 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:19:59,674 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:19:59,674 INFO L85 PathProgramCache]: Analyzing trace with hash 941088554, now seen corresponding path program 6 times [2024-06-27 19:19:59,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:19:59,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303492400] [2024-06-27 19:19:59,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:19:59,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:19:59,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:19:59,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:19:59,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:19:59,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303492400] [2024-06-27 19:19:59,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303492400] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:19:59,766 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:19:59,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:19:59,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372383471] [2024-06-27 19:19:59,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:19:59,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:19:59,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:19:59,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:19:59,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:19:59,813 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:19:59,813 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 433 transitions, 7778 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:59,813 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:19:59,813 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:19:59,813 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:20:00,839 INFO L124 PetriNetUnfolderBase]: 3502/5999 cut-off events. [2024-06-27 19:20:00,840 INFO L125 PetriNetUnfolderBase]: For 524561/524568 co-relation queries the response was YES. [2024-06-27 19:20:00,883 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48354 conditions, 5999 events. 3502/5999 cut-off events. For 524561/524568 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 41298 event pairs, 1086 based on Foata normal form. 7/6003 useless extension candidates. Maximal degree in co-relation 48214. Up to 5405 conditions per place. [2024-06-27 19:20:00,904 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 381 selfloop transitions, 61 changer transitions 0/449 dead transitions. [2024-06-27 19:20:00,904 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 449 transitions, 8700 flow [2024-06-27 19:20:00,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:20:00,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:20:00,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 196 transitions. [2024-06-27 19:20:00,905 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5444444444444444 [2024-06-27 19:20:00,905 INFO L175 Difference]: Start difference. First operand has 301 places, 433 transitions, 7778 flow. Second operand 9 states and 196 transitions. [2024-06-27 19:20:00,905 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 449 transitions, 8700 flow [2024-06-27 19:20:02,350 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 449 transitions, 8532 flow, removed 16 selfloop flow, removed 8 redundant places. [2024-06-27 19:20:02,356 INFO L231 Difference]: Finished difference. Result has 302 places, 433 transitions, 7738 flow [2024-06-27 19:20:02,357 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7610, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=433, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=372, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7738, PETRI_PLACES=302, PETRI_TRANSITIONS=433} [2024-06-27 19:20:02,357 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 261 predicate places. [2024-06-27 19:20:02,357 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 433 transitions, 7738 flow [2024-06-27 19:20:02,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:02,357 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:20:02,358 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:20:02,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-27 19:20:02,358 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:20:02,358 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:20:02,358 INFO L85 PathProgramCache]: Analyzing trace with hash 941088182, now seen corresponding path program 9 times [2024-06-27 19:20:02,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:20:02,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862167803] [2024-06-27 19:20:02,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:20:02,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:20:02,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:20:02,440 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:20:02,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:20:02,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862167803] [2024-06-27 19:20:02,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862167803] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:20:02,441 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:20:02,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:20:02,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587291334] [2024-06-27 19:20:02,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:20:02,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:20:02,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:20:02,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:20:02,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:20:02,486 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:20:02,487 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 433 transitions, 7738 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:02,487 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:20:02,487 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:20:02,487 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:20:03,606 INFO L124 PetriNetUnfolderBase]: 3496/5988 cut-off events. [2024-06-27 19:20:03,606 INFO L125 PetriNetUnfolderBase]: For 536511/536515 co-relation queries the response was YES. [2024-06-27 19:20:03,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48328 conditions, 5988 events. 3496/5988 cut-off events. For 536511/536515 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 41195 event pairs, 1094 based on Foata normal form. 3/5986 useless extension candidates. Maximal degree in co-relation 48187. Up to 5264 conditions per place. [2024-06-27 19:20:03,666 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 332 selfloop transitions, 112 changer transitions 0/451 dead transitions. [2024-06-27 19:20:03,666 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 451 transitions, 8940 flow [2024-06-27 19:20:03,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:20:03,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:20:03,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 204 transitions. [2024-06-27 19:20:03,667 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5666666666666667 [2024-06-27 19:20:03,667 INFO L175 Difference]: Start difference. First operand has 302 places, 433 transitions, 7738 flow. Second operand 9 states and 204 transitions. [2024-06-27 19:20:03,667 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 451 transitions, 8940 flow [2024-06-27 19:20:05,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 451 transitions, 8784 flow, removed 10 selfloop flow, removed 8 redundant places. [2024-06-27 19:20:05,307 INFO L231 Difference]: Finished difference. Result has 303 places, 433 transitions, 7813 flow [2024-06-27 19:20:05,308 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7582, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=433, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=321, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7813, PETRI_PLACES=303, PETRI_TRANSITIONS=433} [2024-06-27 19:20:05,308 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 262 predicate places. [2024-06-27 19:20:05,308 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 433 transitions, 7813 flow [2024-06-27 19:20:05,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:05,309 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:20:05,309 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:20:05,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-27 19:20:05,309 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:20:05,309 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:20:05,309 INFO L85 PathProgramCache]: Analyzing trace with hash 1665056940, now seen corresponding path program 12 times [2024-06-27 19:20:05,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:20:05,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392830857] [2024-06-27 19:20:05,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:20:05,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:20:05,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:20:05,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:20:05,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:20:05,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392830857] [2024-06-27 19:20:05,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392830857] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:20:05,397 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:20:05,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:20:05,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098053899] [2024-06-27 19:20:05,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:20:05,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:20:05,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:20:05,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:20:05,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:20:05,429 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:20:05,429 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 433 transitions, 7813 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:05,430 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:20:05,430 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:20:05,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:20:06,496 INFO L124 PetriNetUnfolderBase]: 3514/6016 cut-off events. [2024-06-27 19:20:06,496 INFO L125 PetriNetUnfolderBase]: For 554004/554008 co-relation queries the response was YES. [2024-06-27 19:20:06,544 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48999 conditions, 6016 events. 3514/6016 cut-off events. For 554004/554008 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 41391 event pairs, 1091 based on Foata normal form. 3/6014 useless extension candidates. Maximal degree in co-relation 48857. Up to 5042 conditions per place. [2024-06-27 19:20:06,567 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 244 selfloop transitions, 212 changer transitions 0/463 dead transitions. [2024-06-27 19:20:06,567 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 463 transitions, 9254 flow [2024-06-27 19:20:06,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:20:06,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:20:06,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 209 transitions. [2024-06-27 19:20:06,569 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5805555555555556 [2024-06-27 19:20:06,569 INFO L175 Difference]: Start difference. First operand has 303 places, 433 transitions, 7813 flow. Second operand 9 states and 209 transitions. [2024-06-27 19:20:06,569 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 463 transitions, 9254 flow [2024-06-27 19:20:08,569 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 463 transitions, 8977 flow, removed 26 selfloop flow, removed 7 redundant places. [2024-06-27 19:20:08,576 INFO L231 Difference]: Finished difference. Result has 305 places, 442 transitions, 8183 flow [2024-06-27 19:20:08,576 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7536, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=433, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=206, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8183, PETRI_PLACES=305, PETRI_TRANSITIONS=442} [2024-06-27 19:20:08,576 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 264 predicate places. [2024-06-27 19:20:08,576 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 442 transitions, 8183 flow [2024-06-27 19:20:08,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:08,577 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:20:08,577 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:20:08,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-27 19:20:08,577 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:20:08,577 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:20:08,577 INFO L85 PathProgramCache]: Analyzing trace with hash 386186008, now seen corresponding path program 7 times [2024-06-27 19:20:08,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:20:08,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886763746] [2024-06-27 19:20:08,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:20:08,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:20:08,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:20:08,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:20:08,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:20:08,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886763746] [2024-06-27 19:20:08,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886763746] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:20:08,670 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:20:08,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:20:08,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340260426] [2024-06-27 19:20:08,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:20:08,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:20:08,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:20:08,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:20:08,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:20:08,711 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:20:08,712 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 442 transitions, 8183 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:08,712 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:20:08,712 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:20:08,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:20:09,860 INFO L124 PetriNetUnfolderBase]: 3519/6029 cut-off events. [2024-06-27 19:20:09,861 INFO L125 PetriNetUnfolderBase]: For 566893/566900 co-relation queries the response was YES. [2024-06-27 19:20:09,898 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49550 conditions, 6029 events. 3519/6029 cut-off events. For 566893/566900 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 41567 event pairs, 1086 based on Foata normal form. 7/6033 useless extension candidates. Maximal degree in co-relation 49407. Up to 5315 conditions per place. [2024-06-27 19:20:09,917 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 339 selfloop transitions, 120 changer transitions 0/466 dead transitions. [2024-06-27 19:20:09,917 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 466 transitions, 9493 flow [2024-06-27 19:20:09,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:20:09,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:20:09,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 203 transitions. [2024-06-27 19:20:09,918 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5638888888888889 [2024-06-27 19:20:09,918 INFO L175 Difference]: Start difference. First operand has 305 places, 442 transitions, 8183 flow. Second operand 9 states and 203 transitions. [2024-06-27 19:20:09,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 466 transitions, 9493 flow [2024-06-27 19:20:11,387 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 466 transitions, 9343 flow, removed 38 selfloop flow, removed 4 redundant places. [2024-06-27 19:20:11,394 INFO L231 Difference]: Finished difference. Result has 310 places, 445 transitions, 8349 flow [2024-06-27 19:20:11,394 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8037, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=442, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=325, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8349, PETRI_PLACES=310, PETRI_TRANSITIONS=445} [2024-06-27 19:20:11,395 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 269 predicate places. [2024-06-27 19:20:11,395 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 445 transitions, 8349 flow [2024-06-27 19:20:11,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:11,395 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:20:11,395 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:20:11,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-27 19:20:11,395 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:20:11,396 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:20:11,396 INFO L85 PathProgramCache]: Analyzing trace with hash 380644696, now seen corresponding path program 10 times [2024-06-27 19:20:11,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:20:11,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158709327] [2024-06-27 19:20:11,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:20:11,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:20:11,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:20:11,476 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:20:11,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:20:11,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158709327] [2024-06-27 19:20:11,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158709327] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:20:11,477 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:20:11,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:20:11,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252312195] [2024-06-27 19:20:11,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:20:11,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:20:11,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:20:11,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:20:11,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:20:11,518 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:20:11,518 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 445 transitions, 8349 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:11,518 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:20:11,518 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:20:11,519 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:20:12,605 INFO L124 PetriNetUnfolderBase]: 3513/6020 cut-off events. [2024-06-27 19:20:12,605 INFO L125 PetriNetUnfolderBase]: For 565910/565914 co-relation queries the response was YES. [2024-06-27 19:20:12,653 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49565 conditions, 6020 events. 3513/6020 cut-off events. For 565910/565914 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 41519 event pairs, 1094 based on Foata normal form. 3/6018 useless extension candidates. Maximal degree in co-relation 49420. Up to 5041 conditions per place. [2024-06-27 19:20:12,675 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 245 selfloop transitions, 220 changer transitions 0/472 dead transitions. [2024-06-27 19:20:12,676 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 472 transitions, 9625 flow [2024-06-27 19:20:12,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:20:12,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:20:12,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 216 transitions. [2024-06-27 19:20:12,677 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-27 19:20:12,677 INFO L175 Difference]: Start difference. First operand has 310 places, 445 transitions, 8349 flow. Second operand 9 states and 216 transitions. [2024-06-27 19:20:12,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 472 transitions, 9625 flow [2024-06-27 19:20:14,438 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 472 transitions, 9362 flow, removed 44 selfloop flow, removed 7 redundant places. [2024-06-27 19:20:14,445 INFO L231 Difference]: Finished difference. Result has 312 places, 445 transitions, 8546 flow [2024-06-27 19:20:14,445 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8090, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=445, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=220, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8546, PETRI_PLACES=312, PETRI_TRANSITIONS=445} [2024-06-27 19:20:14,445 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 271 predicate places. [2024-06-27 19:20:14,446 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 445 transitions, 8546 flow [2024-06-27 19:20:14,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:14,446 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:20:14,446 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:20:14,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-27 19:20:14,446 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:20:14,446 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:20:14,447 INFO L85 PathProgramCache]: Analyzing trace with hash 380645068, now seen corresponding path program 8 times [2024-06-27 19:20:14,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:20:14,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539241862] [2024-06-27 19:20:14,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:20:14,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:20:14,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:20:14,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:20:14,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:20:14,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539241862] [2024-06-27 19:20:14,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539241862] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:20:14,538 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:20:14,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:20:14,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114208886] [2024-06-27 19:20:14,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:20:14,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:20:14,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:20:14,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:20:14,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:20:14,572 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:20:14,572 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 445 transitions, 8546 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:14,572 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:20:14,572 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:20:14,572 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:20:15,755 INFO L124 PetriNetUnfolderBase]: 3510/6015 cut-off events. [2024-06-27 19:20:15,755 INFO L125 PetriNetUnfolderBase]: For 563171/563178 co-relation queries the response was YES. [2024-06-27 19:20:15,794 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49706 conditions, 6015 events. 3510/6015 cut-off events. For 563171/563178 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 41388 event pairs, 1083 based on Foata normal form. 7/6019 useless extension candidates. Maximal degree in co-relation 49561. Up to 5304 conditions per place. [2024-06-27 19:20:15,814 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 337 selfloop transitions, 124 changer transitions 0/468 dead transitions. [2024-06-27 19:20:15,814 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 468 transitions, 9664 flow [2024-06-27 19:20:15,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:20:15,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:20:15,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 205 transitions. [2024-06-27 19:20:15,815 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5694444444444444 [2024-06-27 19:20:15,815 INFO L175 Difference]: Start difference. First operand has 312 places, 445 transitions, 8546 flow. Second operand 9 states and 205 transitions. [2024-06-27 19:20:15,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 468 transitions, 9664 flow [2024-06-27 19:20:17,547 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 468 transitions, 9145 flow, removed 11 selfloop flow, removed 10 redundant places. [2024-06-27 19:20:17,554 INFO L231 Difference]: Finished difference. Result has 311 places, 445 transitions, 8287 flow [2024-06-27 19:20:17,554 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8029, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=445, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=321, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8287, PETRI_PLACES=311, PETRI_TRANSITIONS=445} [2024-06-27 19:20:17,555 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 270 predicate places. [2024-06-27 19:20:17,555 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 445 transitions, 8287 flow [2024-06-27 19:20:17,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:17,555 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:20:17,555 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:20:17,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-27 19:20:17,556 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:20:17,556 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:20:17,556 INFO L85 PathProgramCache]: Analyzing trace with hash -1315944640, now seen corresponding path program 13 times [2024-06-27 19:20:17,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:20:17,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414978687] [2024-06-27 19:20:17,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:20:17,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:20:17,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:20:17,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:20:17,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:20:17,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414978687] [2024-06-27 19:20:17,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414978687] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:20:17,636 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:20:17,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:20:17,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299236669] [2024-06-27 19:20:17,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:20:17,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:20:17,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:20:17,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:20:17,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:20:17,677 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:20:17,677 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 445 transitions, 8287 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:17,677 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:20:17,677 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:20:17,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:20:18,709 INFO L124 PetriNetUnfolderBase]: 3523/6035 cut-off events. [2024-06-27 19:20:18,709 INFO L125 PetriNetUnfolderBase]: For 566351/566358 co-relation queries the response was YES. [2024-06-27 19:20:18,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49670 conditions, 6035 events. 3523/6035 cut-off events. For 566351/566358 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 41611 event pairs, 1122 based on Foata normal form. 4/6031 useless extension candidates. Maximal degree in co-relation 49525. Up to 5049 conditions per place. [2024-06-27 19:20:18,778 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 248 selfloop transitions, 215 changer transitions 0/470 dead transitions. [2024-06-27 19:20:18,778 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 470 transitions, 9967 flow [2024-06-27 19:20:18,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:20:18,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:20:18,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 188 transitions. [2024-06-27 19:20:18,779 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5875 [2024-06-27 19:20:18,779 INFO L175 Difference]: Start difference. First operand has 311 places, 445 transitions, 8287 flow. Second operand 8 states and 188 transitions. [2024-06-27 19:20:18,779 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 470 transitions, 9967 flow [2024-06-27 19:20:20,682 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 470 transitions, 9608 flow, removed 16 selfloop flow, removed 10 redundant places. [2024-06-27 19:20:20,689 INFO L231 Difference]: Finished difference. Result has 309 places, 451 transitions, 8522 flow [2024-06-27 19:20:20,690 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7936, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=445, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=209, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8522, PETRI_PLACES=309, PETRI_TRANSITIONS=451} [2024-06-27 19:20:20,690 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 268 predicate places. [2024-06-27 19:20:20,690 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 451 transitions, 8522 flow [2024-06-27 19:20:20,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:20,690 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:20:20,690 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:20:20,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-27 19:20:20,691 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:20:20,691 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:20:20,691 INFO L85 PathProgramCache]: Analyzing trace with hash 122630972, now seen corresponding path program 14 times [2024-06-27 19:20:20,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:20:20,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949007953] [2024-06-27 19:20:20,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:20:20,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:20:20,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:20:20,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:20:20,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:20:20,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949007953] [2024-06-27 19:20:20,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949007953] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:20:20,783 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:20:20,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:20:20,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31273866] [2024-06-27 19:20:20,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:20:20,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:20:20,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:20:20,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:20:20,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:20:20,848 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:20:20,848 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 451 transitions, 8522 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:20,848 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:20:20,849 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:20:20,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:20:22,003 INFO L124 PetriNetUnfolderBase]: 3520/6024 cut-off events. [2024-06-27 19:20:22,004 INFO L125 PetriNetUnfolderBase]: For 562753/562757 co-relation queries the response was YES. [2024-06-27 19:20:22,044 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49653 conditions, 6024 events. 3520/6024 cut-off events. For 562753/562757 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 41489 event pairs, 1089 based on Foata normal form. 2/6021 useless extension candidates. Maximal degree in co-relation 49509. Up to 5485 conditions per place. [2024-06-27 19:20:22,065 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 424 selfloop transitions, 31 changer transitions 0/462 dead transitions. [2024-06-27 19:20:22,065 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 462 transitions, 9458 flow [2024-06-27 19:20:22,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:20:22,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:20:22,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 152 transitions. [2024-06-27 19:20:22,066 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5428571428571428 [2024-06-27 19:20:22,066 INFO L175 Difference]: Start difference. First operand has 309 places, 451 transitions, 8522 flow. Second operand 7 states and 152 transitions. [2024-06-27 19:20:22,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 462 transitions, 9458 flow [2024-06-27 19:20:23,695 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 462 transitions, 8882 flow, removed 57 selfloop flow, removed 5 redundant places. [2024-06-27 19:20:23,702 INFO L231 Difference]: Finished difference. Result has 311 places, 451 transitions, 8014 flow [2024-06-27 19:20:23,702 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7946, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=451, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=420, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8014, PETRI_PLACES=311, PETRI_TRANSITIONS=451} [2024-06-27 19:20:23,702 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 270 predicate places. [2024-06-27 19:20:23,702 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 451 transitions, 8014 flow [2024-06-27 19:20:23,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:23,702 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:20:23,703 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:20:23,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-27 19:20:23,703 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:20:23,703 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:20:23,703 INFO L85 PathProgramCache]: Analyzing trace with hash -1315944454, now seen corresponding path program 9 times [2024-06-27 19:20:23,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:20:23,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804110471] [2024-06-27 19:20:23,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:20:23,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:20:23,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:20:23,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:20:23,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:20:23,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804110471] [2024-06-27 19:20:23,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804110471] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:20:23,794 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:20:23,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:20:23,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266191424] [2024-06-27 19:20:23,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:20:23,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:20:23,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:20:23,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:20:23,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:20:23,839 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:20:23,839 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 451 transitions, 8014 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:23,839 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:20:23,839 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:20:23,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:20:24,886 INFO L124 PetriNetUnfolderBase]: 3525/6051 cut-off events. [2024-06-27 19:20:24,886 INFO L125 PetriNetUnfolderBase]: For 575106/575116 co-relation queries the response was YES. [2024-06-27 19:20:24,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49196 conditions, 6051 events. 3525/6051 cut-off events. For 575106/575116 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 41844 event pairs, 1105 based on Foata normal form. 9/6054 useless extension candidates. Maximal degree in co-relation 49052. Up to 5324 conditions per place. [2024-06-27 19:20:24,956 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 342 selfloop transitions, 122 changer transitions 0/471 dead transitions. [2024-06-27 19:20:24,956 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 471 transitions, 9187 flow [2024-06-27 19:20:24,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:20:24,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:20:24,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 198 transitions. [2024-06-27 19:20:24,957 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.55 [2024-06-27 19:20:24,957 INFO L175 Difference]: Start difference. First operand has 311 places, 451 transitions, 8014 flow. Second operand 9 states and 198 transitions. [2024-06-27 19:20:24,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 471 transitions, 9187 flow [2024-06-27 19:20:26,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 471 transitions, 9073 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-27 19:20:26,742 INFO L231 Difference]: Finished difference. Result has 312 places, 454 transitions, 8213 flow [2024-06-27 19:20:26,743 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7900, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=451, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=332, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8213, PETRI_PLACES=312, PETRI_TRANSITIONS=454} [2024-06-27 19:20:26,743 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 271 predicate places. [2024-06-27 19:20:26,743 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 454 transitions, 8213 flow [2024-06-27 19:20:26,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:26,743 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:20:26,743 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:20:26,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-27 19:20:26,744 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:20:26,744 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:20:26,744 INFO L85 PathProgramCache]: Analyzing trace with hash 1858996536, now seen corresponding path program 10 times [2024-06-27 19:20:26,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:20:26,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135770336] [2024-06-27 19:20:26,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:20:26,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:20:26,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:20:26,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:20:26,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:20:26,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135770336] [2024-06-27 19:20:26,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135770336] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:20:26,845 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:20:26,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:20:26,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426679391] [2024-06-27 19:20:26,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:20:26,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:20:26,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:20:26,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:20:26,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:20:26,883 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:20:26,883 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 454 transitions, 8213 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:26,883 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:20:26,883 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:20:26,883 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:20:28,056 INFO L124 PetriNetUnfolderBase]: 3522/6043 cut-off events. [2024-06-27 19:20:28,056 INFO L125 PetriNetUnfolderBase]: For 588958/588968 co-relation queries the response was YES. [2024-06-27 19:20:28,094 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49499 conditions, 6043 events. 3522/6043 cut-off events. For 588958/588968 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 41751 event pairs, 1103 based on Foata normal form. 9/6046 useless extension candidates. Maximal degree in co-relation 49355. Up to 5321 conditions per place. [2024-06-27 19:20:28,114 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 341 selfloop transitions, 121 changer transitions 0/469 dead transitions. [2024-06-27 19:20:28,114 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 469 transitions, 9173 flow [2024-06-27 19:20:28,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:20:28,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:20:28,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 178 transitions. [2024-06-27 19:20:28,117 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.55625 [2024-06-27 19:20:28,117 INFO L175 Difference]: Start difference. First operand has 312 places, 454 transitions, 8213 flow. Second operand 8 states and 178 transitions. [2024-06-27 19:20:28,117 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 469 transitions, 9173 flow [2024-06-27 19:20:29,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 469 transitions, 8744 flow, removed 37 selfloop flow, removed 8 redundant places. [2024-06-27 19:20:29,721 INFO L231 Difference]: Finished difference. Result has 312 places, 454 transitions, 8032 flow [2024-06-27 19:20:29,721 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7784, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=454, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=333, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8032, PETRI_PLACES=312, PETRI_TRANSITIONS=454} [2024-06-27 19:20:29,721 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 271 predicate places. [2024-06-27 19:20:29,722 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 454 transitions, 8032 flow [2024-06-27 19:20:29,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:29,722 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:20:29,722 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:20:29,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-27 19:20:29,722 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:20:29,722 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:20:29,722 INFO L85 PathProgramCache]: Analyzing trace with hash -1138813120, now seen corresponding path program 15 times [2024-06-27 19:20:29,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:20:29,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452108997] [2024-06-27 19:20:29,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:20:29,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:20:29,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:20:29,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:20:29,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:20:29,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452108997] [2024-06-27 19:20:29,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452108997] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:20:29,813 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:20:29,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:20:29,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319828946] [2024-06-27 19:20:29,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:20:29,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:20:29,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:20:29,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:20:29,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:20:29,852 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:20:29,852 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 454 transitions, 8032 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:29,853 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:20:29,853 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:20:29,853 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:20:30,925 INFO L124 PetriNetUnfolderBase]: 3519/6032 cut-off events. [2024-06-27 19:20:30,926 INFO L125 PetriNetUnfolderBase]: For 600805/600812 co-relation queries the response was YES. [2024-06-27 19:20:30,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49290 conditions, 6032 events. 3519/6032 cut-off events. For 600805/600812 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 41632 event pairs, 1122 based on Foata normal form. 4/6028 useless extension candidates. Maximal degree in co-relation 49146. Up to 5047 conditions per place. [2024-06-27 19:20:31,000 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 246 selfloop transitions, 218 changer transitions 0/471 dead transitions. [2024-06-27 19:20:31,000 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 471 transitions, 9292 flow [2024-06-27 19:20:31,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:20:31,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:20:31,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 184 transitions. [2024-06-27 19:20:31,001 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.575 [2024-06-27 19:20:31,001 INFO L175 Difference]: Start difference. First operand has 312 places, 454 transitions, 8032 flow. Second operand 8 states and 184 transitions. [2024-06-27 19:20:31,001 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 471 transitions, 9292 flow [2024-06-27 19:20:32,989 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 471 transitions, 8954 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-06-27 19:20:32,996 INFO L231 Difference]: Finished difference. Result has 312 places, 454 transitions, 8136 flow [2024-06-27 19:20:32,996 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7694, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=454, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=218, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8136, PETRI_PLACES=312, PETRI_TRANSITIONS=454} [2024-06-27 19:20:32,997 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 271 predicate places. [2024-06-27 19:20:32,997 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 454 transitions, 8136 flow [2024-06-27 19:20:32,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:32,997 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:20:32,997 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:20:32,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-27 19:20:32,997 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:20:32,998 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:20:32,998 INFO L85 PathProgramCache]: Analyzing trace with hash 1409342124, now seen corresponding path program 1 times [2024-06-27 19:20:32,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:20:32,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498724092] [2024-06-27 19:20:32,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:20:32,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:20:33,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:20:33,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:20:33,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:20:33,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498724092] [2024-06-27 19:20:33,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498724092] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:20:33,093 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:20:33,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:20:33,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137245363] [2024-06-27 19:20:33,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:20:33,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:20:33,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:20:33,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:20:33,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:20:33,140 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:20:33,141 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 454 transitions, 8136 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:33,141 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:20:33,141 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:20:33,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:20:34,323 INFO L124 PetriNetUnfolderBase]: 3539/6064 cut-off events. [2024-06-27 19:20:34,324 INFO L125 PetriNetUnfolderBase]: For 628961/628961 co-relation queries the response was YES. [2024-06-27 19:20:34,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49892 conditions, 6064 events. 3539/6064 cut-off events. For 628961/628961 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 41836 event pairs, 1039 based on Foata normal form. 6/6068 useless extension candidates. Maximal degree in co-relation 49747. Up to 5383 conditions per place. [2024-06-27 19:20:34,383 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 428 selfloop transitions, 52 changer transitions 0/487 dead transitions. [2024-06-27 19:20:34,383 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 487 transitions, 9278 flow [2024-06-27 19:20:34,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:20:34,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:20:34,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 186 transitions. [2024-06-27 19:20:34,384 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.58125 [2024-06-27 19:20:34,384 INFO L175 Difference]: Start difference. First operand has 312 places, 454 transitions, 8136 flow. Second operand 8 states and 186 transitions. [2024-06-27 19:20:34,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 487 transitions, 9278 flow [2024-06-27 19:20:36,327 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 487 transitions, 8461 flow, removed 7 selfloop flow, removed 10 redundant places. [2024-06-27 19:20:36,333 INFO L231 Difference]: Finished difference. Result has 310 places, 455 transitions, 7457 flow [2024-06-27 19:20:36,334 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7327, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=454, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=402, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7457, PETRI_PLACES=310, PETRI_TRANSITIONS=455} [2024-06-27 19:20:36,334 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 269 predicate places. [2024-06-27 19:20:36,334 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 455 transitions, 7457 flow [2024-06-27 19:20:36,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:36,334 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:20:36,335 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:20:36,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-27 19:20:36,335 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:20:36,335 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:20:36,335 INFO L85 PathProgramCache]: Analyzing trace with hash 1662454218, now seen corresponding path program 2 times [2024-06-27 19:20:36,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:20:36,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163590818] [2024-06-27 19:20:36,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:20:36,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:20:36,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:20:36,432 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:20:36,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:20:36,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163590818] [2024-06-27 19:20:36,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163590818] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:20:36,433 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:20:36,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:20:36,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606244064] [2024-06-27 19:20:36,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:20:36,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:20:36,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:20:36,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:20:36,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:20:36,475 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:20:36,475 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 455 transitions, 7457 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:36,475 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:20:36,475 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:20:36,476 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:20:37,603 INFO L124 PetriNetUnfolderBase]: 3567/6118 cut-off events. [2024-06-27 19:20:37,603 INFO L125 PetriNetUnfolderBase]: For 645874/645874 co-relation queries the response was YES. [2024-06-27 19:20:37,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49707 conditions, 6118 events. 3567/6118 cut-off events. For 645874/645874 co-relation queries the response was YES. Maximal size of possible extension queue 366. Compared 42293 event pairs, 1090 based on Foata normal form. 8/6124 useless extension candidates. Maximal degree in co-relation 49562. Up to 5527 conditions per place. [2024-06-27 19:20:37,677 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 431 selfloop transitions, 43 changer transitions 0/481 dead transitions. [2024-06-27 19:20:37,678 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 481 transitions, 8555 flow [2024-06-27 19:20:37,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:20:37,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:20:37,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 180 transitions. [2024-06-27 19:20:37,679 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5625 [2024-06-27 19:20:37,679 INFO L175 Difference]: Start difference. First operand has 310 places, 455 transitions, 7457 flow. Second operand 8 states and 180 transitions. [2024-06-27 19:20:37,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 481 transitions, 8555 flow [2024-06-27 19:20:39,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 481 transitions, 8427 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-27 19:20:39,655 INFO L231 Difference]: Finished difference. Result has 311 places, 456 transitions, 7445 flow [2024-06-27 19:20:39,656 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7330, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=455, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=412, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7445, PETRI_PLACES=311, PETRI_TRANSITIONS=456} [2024-06-27 19:20:39,656 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 270 predicate places. [2024-06-27 19:20:39,656 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 456 transitions, 7445 flow [2024-06-27 19:20:39,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:39,656 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:20:39,656 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:20:39,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-27 19:20:39,657 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:20:39,657 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:20:39,657 INFO L85 PathProgramCache]: Analyzing trace with hash 1575614538, now seen corresponding path program 3 times [2024-06-27 19:20:39,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:20:39,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045507220] [2024-06-27 19:20:39,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:20:39,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:20:39,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:20:39,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:20:39,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:20:39,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045507220] [2024-06-27 19:20:39,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045507220] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:20:39,766 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:20:39,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:20:39,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688197242] [2024-06-27 19:20:39,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:20:39,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:20:39,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:20:39,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:20:39,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:20:39,811 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:20:39,812 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 456 transitions, 7445 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:39,813 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:20:39,813 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:20:39,813 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:20:40,975 INFO L124 PetriNetUnfolderBase]: 3587/6154 cut-off events. [2024-06-27 19:20:40,976 INFO L125 PetriNetUnfolderBase]: For 656125/656125 co-relation queries the response was YES. [2024-06-27 19:20:41,017 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49997 conditions, 6154 events. 3587/6154 cut-off events. For 656125/656125 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 42599 event pairs, 1090 based on Foata normal form. 6/6158 useless extension candidates. Maximal degree in co-relation 49851. Up to 5529 conditions per place. [2024-06-27 19:20:41,036 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 433 selfloop transitions, 46 changer transitions 0/486 dead transitions. [2024-06-27 19:20:41,037 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 486 transitions, 8572 flow [2024-06-27 19:20:41,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:20:41,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:20:41,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 200 transitions. [2024-06-27 19:20:41,038 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5555555555555556 [2024-06-27 19:20:41,038 INFO L175 Difference]: Start difference. First operand has 311 places, 456 transitions, 7445 flow. Second operand 9 states and 200 transitions. [2024-06-27 19:20:41,038 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 486 transitions, 8572 flow [2024-06-27 19:20:42,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 486 transitions, 8471 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-27 19:20:42,694 INFO L231 Difference]: Finished difference. Result has 314 places, 457 transitions, 7466 flow [2024-06-27 19:20:42,695 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7344, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=456, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=410, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7466, PETRI_PLACES=314, PETRI_TRANSITIONS=457} [2024-06-27 19:20:42,695 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 273 predicate places. [2024-06-27 19:20:42,695 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 457 transitions, 7466 flow [2024-06-27 19:20:42,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:42,695 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:20:42,695 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:20:42,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-27 19:20:42,696 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:20:42,696 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:20:42,696 INFO L85 PathProgramCache]: Analyzing trace with hash -875822534, now seen corresponding path program 4 times [2024-06-27 19:20:42,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:20:42,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242047510] [2024-06-27 19:20:42,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:20:42,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:20:42,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:20:42,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:20:42,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:20:42,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242047510] [2024-06-27 19:20:42,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242047510] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:20:42,783 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:20:42,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:20:42,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396857563] [2024-06-27 19:20:42,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:20:42,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:20:42,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:20:42,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:20:42,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:20:42,822 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:20:42,822 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 457 transitions, 7466 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:42,822 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:20:42,822 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:20:42,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:20:43,914 INFO L124 PetriNetUnfolderBase]: 3655/6270 cut-off events. [2024-06-27 19:20:43,914 INFO L125 PetriNetUnfolderBase]: For 702220/702227 co-relation queries the response was YES. [2024-06-27 19:20:43,962 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51099 conditions, 6270 events. 3655/6270 cut-off events. For 702220/702227 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 43569 event pairs, 1111 based on Foata normal form. 18/6285 useless extension candidates. Maximal degree in co-relation 50952. Up to 5414 conditions per place. [2024-06-27 19:20:43,984 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 424 selfloop transitions, 54 changer transitions 0/485 dead transitions. [2024-06-27 19:20:43,984 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 485 transitions, 8757 flow [2024-06-27 19:20:43,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:20:43,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:20:43,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 184 transitions. [2024-06-27 19:20:43,985 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.575 [2024-06-27 19:20:43,985 INFO L175 Difference]: Start difference. First operand has 314 places, 457 transitions, 7466 flow. Second operand 8 states and 184 transitions. [2024-06-27 19:20:43,985 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 485 transitions, 8757 flow [2024-06-27 19:20:45,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 485 transitions, 8667 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-27 19:20:45,988 INFO L231 Difference]: Finished difference. Result has 317 places, 462 transitions, 7607 flow [2024-06-27 19:20:45,988 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7376, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=457, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=405, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7607, PETRI_PLACES=317, PETRI_TRANSITIONS=462} [2024-06-27 19:20:45,988 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 276 predicate places. [2024-06-27 19:20:45,988 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 462 transitions, 7607 flow [2024-06-27 19:20:45,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:45,989 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:20:45,989 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:20:45,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-27 19:20:45,989 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:20:45,989 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:20:45,989 INFO L85 PathProgramCache]: Analyzing trace with hash -870097082, now seen corresponding path program 1 times [2024-06-27 19:20:45,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:20:45,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941784458] [2024-06-27 19:20:45,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:20:45,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:20:45,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:20:46,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:20:46,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:20:46,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941784458] [2024-06-27 19:20:46,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941784458] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:20:46,089 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:20:46,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:20:46,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535931747] [2024-06-27 19:20:46,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:20:46,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:20:46,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:20:46,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:20:46,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:20:46,128 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:20:46,128 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 462 transitions, 7607 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:46,129 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:20:46,129 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:20:46,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:20:47,272 INFO L124 PetriNetUnfolderBase]: 3629/6232 cut-off events. [2024-06-27 19:20:47,273 INFO L125 PetriNetUnfolderBase]: For 683997/684004 co-relation queries the response was YES. [2024-06-27 19:20:47,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50305 conditions, 6232 events. 3629/6232 cut-off events. For 683997/684004 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 43234 event pairs, 1097 based on Foata normal form. 18/6247 useless extension candidates. Maximal degree in co-relation 50156. Up to 5402 conditions per place. [2024-06-27 19:20:47,335 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 424 selfloop transitions, 53 changer transitions 0/484 dead transitions. [2024-06-27 19:20:47,335 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 484 transitions, 8653 flow [2024-06-27 19:20:47,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:20:47,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:20:47,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 183 transitions. [2024-06-27 19:20:47,336 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.571875 [2024-06-27 19:20:47,336 INFO L175 Difference]: Start difference. First operand has 317 places, 462 transitions, 7607 flow. Second operand 8 states and 183 transitions. [2024-06-27 19:20:47,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 484 transitions, 8653 flow [2024-06-27 19:20:49,342 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 484 transitions, 8546 flow, removed 35 selfloop flow, removed 3 redundant places. [2024-06-27 19:20:49,352 INFO L231 Difference]: Finished difference. Result has 322 places, 462 transitions, 7611 flow [2024-06-27 19:20:49,353 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7500, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=462, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=409, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7611, PETRI_PLACES=322, PETRI_TRANSITIONS=462} [2024-06-27 19:20:49,353 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 281 predicate places. [2024-06-27 19:20:49,353 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 462 transitions, 7611 flow [2024-06-27 19:20:49,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:49,353 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:20:49,353 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:20:49,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-27 19:20:49,354 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:20:49,354 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:20:49,354 INFO L85 PathProgramCache]: Analyzing trace with hash 1180926412, now seen corresponding path program 5 times [2024-06-27 19:20:49,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:20:49,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078897482] [2024-06-27 19:20:49,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:20:49,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:20:49,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:20:49,435 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:20:49,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:20:49,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078897482] [2024-06-27 19:20:49,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078897482] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:20:49,436 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:20:49,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:20:49,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555192640] [2024-06-27 19:20:49,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:20:49,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:20:49,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:20:49,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:20:49,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:20:49,470 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:20:49,470 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 462 transitions, 7611 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:49,470 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:20:49,470 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:20:49,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:20:50,660 INFO L124 PetriNetUnfolderBase]: 3656/6287 cut-off events. [2024-06-27 19:20:50,660 INFO L125 PetriNetUnfolderBase]: For 699765/699772 co-relation queries the response was YES. [2024-06-27 19:20:50,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50237 conditions, 6287 events. 3656/6287 cut-off events. For 699765/699772 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 43727 event pairs, 1025 based on Foata normal form. 24/6308 useless extension candidates. Maximal degree in co-relation 50086. Up to 4981 conditions per place. [2024-06-27 19:20:50,737 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 377 selfloop transitions, 109 changer transitions 0/493 dead transitions. [2024-06-27 19:20:50,737 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 493 transitions, 8889 flow [2024-06-27 19:20:50,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:20:50,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:20:50,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-06-27 19:20:50,738 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-27 19:20:50,738 INFO L175 Difference]: Start difference. First operand has 322 places, 462 transitions, 7611 flow. Second operand 8 states and 192 transitions. [2024-06-27 19:20:50,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 493 transitions, 8889 flow [2024-06-27 19:20:53,043 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 493 transitions, 8787 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-27 19:20:53,049 INFO L231 Difference]: Finished difference. Result has 325 places, 464 transitions, 7785 flow [2024-06-27 19:20:53,050 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7509, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=462, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=354, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7785, PETRI_PLACES=325, PETRI_TRANSITIONS=464} [2024-06-27 19:20:53,050 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 284 predicate places. [2024-06-27 19:20:53,050 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 464 transitions, 7785 flow [2024-06-27 19:20:53,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:53,051 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:20:53,051 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:20:53,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-27 19:20:53,051 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:20:53,051 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:20:53,051 INFO L85 PathProgramCache]: Analyzing trace with hash 641162548, now seen corresponding path program 1 times [2024-06-27 19:20:53,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:20:53,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694832127] [2024-06-27 19:20:53,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:20:53,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:20:53,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:20:53,159 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:20:53,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:20:53,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694832127] [2024-06-27 19:20:53,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694832127] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:20:53,160 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:20:53,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:20:53,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111146410] [2024-06-27 19:20:53,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:20:53,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:20:53,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:20:53,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:20:53,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:20:53,204 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:20:53,205 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 464 transitions, 7785 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:53,205 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:20:53,205 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:20:53,205 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:20:54,412 INFO L124 PetriNetUnfolderBase]: 3653/6280 cut-off events. [2024-06-27 19:20:54,413 INFO L125 PetriNetUnfolderBase]: For 661404/661408 co-relation queries the response was YES. [2024-06-27 19:20:54,460 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50647 conditions, 6280 events. 3653/6280 cut-off events. For 661404/661408 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 43730 event pairs, 1123 based on Foata normal form. 2/6277 useless extension candidates. Maximal degree in co-relation 50495. Up to 5545 conditions per place. [2024-06-27 19:20:54,483 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 359 selfloop transitions, 118 changer transitions 0/484 dead transitions. [2024-06-27 19:20:54,483 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 484 transitions, 8825 flow [2024-06-27 19:20:54,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:20:54,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:20:54,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 189 transitions. [2024-06-27 19:20:54,484 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.590625 [2024-06-27 19:20:54,484 INFO L175 Difference]: Start difference. First operand has 325 places, 464 transitions, 7785 flow. Second operand 8 states and 189 transitions. [2024-06-27 19:20:54,484 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 484 transitions, 8825 flow [2024-06-27 19:20:56,916 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 484 transitions, 8661 flow, removed 31 selfloop flow, removed 5 redundant places. [2024-06-27 19:20:56,922 INFO L231 Difference]: Finished difference. Result has 328 places, 464 transitions, 7875 flow [2024-06-27 19:20:56,922 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7625, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=464, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=346, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7875, PETRI_PLACES=328, PETRI_TRANSITIONS=464} [2024-06-27 19:20:56,923 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 287 predicate places. [2024-06-27 19:20:56,923 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 464 transitions, 7875 flow [2024-06-27 19:20:56,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:56,923 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:20:56,923 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:20:56,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-27 19:20:56,923 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:20:56,924 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:20:56,924 INFO L85 PathProgramCache]: Analyzing trace with hash -60534925, now seen corresponding path program 1 times [2024-06-27 19:20:56,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:20:56,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989911080] [2024-06-27 19:20:56,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:20:56,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:20:56,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:20:57,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:20:57,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:20:57,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989911080] [2024-06-27 19:20:57,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989911080] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:20:57,004 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:20:57,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:20:57,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692059525] [2024-06-27 19:20:57,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:20:57,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:20:57,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:20:57,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:20:57,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:20:57,040 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:20:57,040 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 464 transitions, 7875 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:57,040 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:20:57,040 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:20:57,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:20:58,232 INFO L124 PetriNetUnfolderBase]: 3674/6314 cut-off events. [2024-06-27 19:20:58,233 INFO L125 PetriNetUnfolderBase]: For 655656/655663 co-relation queries the response was YES. [2024-06-27 19:20:58,286 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50907 conditions, 6314 events. 3674/6314 cut-off events. For 655656/655663 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 44052 event pairs, 1020 based on Foata normal form. 8/6319 useless extension candidates. Maximal degree in co-relation 50754. Up to 5422 conditions per place. [2024-06-27 19:20:58,310 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 365 selfloop transitions, 124 changer transitions 0/496 dead transitions. [2024-06-27 19:20:58,310 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 496 transitions, 9239 flow [2024-06-27 19:20:58,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:20:58,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:20:58,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 209 transitions. [2024-06-27 19:20:58,311 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5805555555555556 [2024-06-27 19:20:58,311 INFO L175 Difference]: Start difference. First operand has 328 places, 464 transitions, 7875 flow. Second operand 9 states and 209 transitions. [2024-06-27 19:20:58,311 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 496 transitions, 9239 flow [2024-06-27 19:21:00,439 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 496 transitions, 8894 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-27 19:21:00,446 INFO L231 Difference]: Finished difference. Result has 330 places, 468 transitions, 7927 flow [2024-06-27 19:21:00,447 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7530, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=464, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=342, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7927, PETRI_PLACES=330, PETRI_TRANSITIONS=468} [2024-06-27 19:21:00,447 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 289 predicate places. [2024-06-27 19:21:00,447 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 468 transitions, 7927 flow [2024-06-27 19:21:00,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:21:00,447 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:21:00,447 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:21:00,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-27 19:21:00,448 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:21:00,448 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:21:00,448 INFO L85 PathProgramCache]: Analyzing trace with hash -1086128253, now seen corresponding path program 2 times [2024-06-27 19:21:00,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:21:00,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788463302] [2024-06-27 19:21:00,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:21:00,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:21:00,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:21:00,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:21:00,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:21:00,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788463302] [2024-06-27 19:21:00,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788463302] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:21:00,533 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:21:00,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:21:00,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237877800] [2024-06-27 19:21:00,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:21:00,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:21:00,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:21:00,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:21:00,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:21:00,586 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:21:00,586 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 468 transitions, 7927 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:21:00,587 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:21:00,587 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:21:00,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:21:01,812 INFO L124 PetriNetUnfolderBase]: 3669/6305 cut-off events. [2024-06-27 19:21:01,813 INFO L125 PetriNetUnfolderBase]: For 664895/664902 co-relation queries the response was YES. [2024-06-27 19:21:01,867 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50992 conditions, 6305 events. 3669/6305 cut-off events. For 664895/664902 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 43941 event pairs, 1113 based on Foata normal form. 8/6308 useless extension candidates. Maximal degree in co-relation 50838. Up to 5588 conditions per place. [2024-06-27 19:21:01,891 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 374 selfloop transitions, 107 changer transitions 0/488 dead transitions. [2024-06-27 19:21:01,891 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 488 transitions, 8937 flow [2024-06-27 19:21:01,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:21:01,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:21:01,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 201 transitions. [2024-06-27 19:21:01,892 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5583333333333333 [2024-06-27 19:21:01,892 INFO L175 Difference]: Start difference. First operand has 330 places, 468 transitions, 7927 flow. Second operand 9 states and 201 transitions. [2024-06-27 19:21:01,893 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 488 transitions, 8937 flow [2024-06-27 19:21:04,009 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 488 transitions, 8702 flow, removed 51 selfloop flow, removed 6 redundant places. [2024-06-27 19:21:04,016 INFO L231 Difference]: Finished difference. Result has 333 places, 468 transitions, 7915 flow [2024-06-27 19:21:04,017 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7692, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=468, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=361, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7915, PETRI_PLACES=333, PETRI_TRANSITIONS=468} [2024-06-27 19:21:04,017 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 292 predicate places. [2024-06-27 19:21:04,017 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 468 transitions, 7915 flow [2024-06-27 19:21:04,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:21:04,017 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:21:04,017 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:21:04,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-27 19:21:04,018 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:21:04,018 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:21:04,018 INFO L85 PathProgramCache]: Analyzing trace with hash -233172778, now seen corresponding path program 2 times [2024-06-27 19:21:04,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:21:04,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347887824] [2024-06-27 19:21:04,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:21:04,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:21:04,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:21:04,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:21:04,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:21:04,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347887824] [2024-06-27 19:21:04,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347887824] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:21:04,129 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:21:04,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:21:04,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559055171] [2024-06-27 19:21:04,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:21:04,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:21:04,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:21:04,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:21:04,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:21:04,186 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:21:04,186 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 468 transitions, 7915 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:21:04,186 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:21:04,186 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:21:04,186 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:21:05,401 INFO L124 PetriNetUnfolderBase]: 3674/6313 cut-off events. [2024-06-27 19:21:05,401 INFO L125 PetriNetUnfolderBase]: For 662555/662559 co-relation queries the response was YES. [2024-06-27 19:21:05,458 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51086 conditions, 6313 events. 3674/6313 cut-off events. For 662555/662559 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 43960 event pairs, 1123 based on Foata normal form. 2/6310 useless extension candidates. Maximal degree in co-relation 50931. Up to 5388 conditions per place. [2024-06-27 19:21:05,482 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 310 selfloop transitions, 185 changer transitions 0/502 dead transitions. [2024-06-27 19:21:05,482 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 502 transitions, 9195 flow [2024-06-27 19:21:05,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 19:21:05,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 19:21:05,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 252 transitions. [2024-06-27 19:21:05,485 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5727272727272728 [2024-06-27 19:21:05,485 INFO L175 Difference]: Start difference. First operand has 333 places, 468 transitions, 7915 flow. Second operand 11 states and 252 transitions. [2024-06-27 19:21:05,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 502 transitions, 9195 flow [2024-06-27 19:21:07,687 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 334 places, 502 transitions, 8923 flow, removed 14 selfloop flow, removed 9 redundant places. [2024-06-27 19:21:07,694 INFO L231 Difference]: Finished difference. Result has 335 places, 471 transitions, 8075 flow [2024-06-27 19:21:07,694 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7645, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=468, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=182, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8075, PETRI_PLACES=335, PETRI_TRANSITIONS=471} [2024-06-27 19:21:07,695 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 294 predicate places. [2024-06-27 19:21:07,695 INFO L495 AbstractCegarLoop]: Abstraction has has 335 places, 471 transitions, 8075 flow [2024-06-27 19:21:07,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:21:07,695 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:21:07,695 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:21:07,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-27 19:21:07,695 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:21:07,695 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:21:07,696 INFO L85 PathProgramCache]: Analyzing trace with hash -1095389286, now seen corresponding path program 3 times [2024-06-27 19:21:07,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:21:07,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668330980] [2024-06-27 19:21:07,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:21:07,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:21:07,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:21:07,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:21:07,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:21:07,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668330980] [2024-06-27 19:21:07,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668330980] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:21:07,802 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:21:07,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:21:07,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110273151] [2024-06-27 19:21:07,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:21:07,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:21:07,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:21:07,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:21:07,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:21:07,870 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:21:07,877 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 335 places, 471 transitions, 8075 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:21:07,877 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:21:07,877 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:21:07,877 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:21:09,008 INFO L124 PetriNetUnfolderBase]: 3679/6322 cut-off events. [2024-06-27 19:21:09,008 INFO L125 PetriNetUnfolderBase]: For 663074/663078 co-relation queries the response was YES. [2024-06-27 19:21:09,059 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51287 conditions, 6322 events. 3679/6322 cut-off events. For 663074/663078 co-relation queries the response was YES. Maximal size of possible extension queue 379. Compared 44021 event pairs, 1123 based on Foata normal form. 2/6319 useless extension candidates. Maximal degree in co-relation 51132. Up to 5394 conditions per place. [2024-06-27 19:21:09,081 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 296 selfloop transitions, 195 changer transitions 0/498 dead transitions. [2024-06-27 19:21:09,081 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 498 transitions, 9335 flow [2024-06-27 19:21:09,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:21:09,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:21:09,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 227 transitions. [2024-06-27 19:21:09,082 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5675 [2024-06-27 19:21:09,082 INFO L175 Difference]: Start difference. First operand has 335 places, 471 transitions, 8075 flow. Second operand 10 states and 227 transitions. [2024-06-27 19:21:09,082 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 498 transitions, 9335 flow [2024-06-27 19:21:11,115 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 498 transitions, 8935 flow, removed 12 selfloop flow, removed 9 redundant places. [2024-06-27 19:21:11,125 INFO L231 Difference]: Finished difference. Result has 336 places, 474 transitions, 8131 flow [2024-06-27 19:21:11,125 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7681, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=471, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=192, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8131, PETRI_PLACES=336, PETRI_TRANSITIONS=474} [2024-06-27 19:21:11,126 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 295 predicate places. [2024-06-27 19:21:11,126 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 474 transitions, 8131 flow [2024-06-27 19:21:11,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:21:11,126 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:21:11,126 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:21:11,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-27 19:21:11,126 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:21:11,126 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:21:11,127 INFO L85 PathProgramCache]: Analyzing trace with hash -57684568, now seen corresponding path program 4 times [2024-06-27 19:21:11,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:21:11,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838035081] [2024-06-27 19:21:11,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:21:11,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:21:11,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:21:11,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:21:11,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:21:11,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838035081] [2024-06-27 19:21:11,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838035081] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:21:11,220 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:21:11,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:21:11,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851237284] [2024-06-27 19:21:11,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:21:11,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:21:11,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:21:11,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:21:11,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:21:11,310 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:21:11,311 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 474 transitions, 8131 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:21:11,311 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:21:11,311 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:21:11,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:21:12,462 INFO L124 PetriNetUnfolderBase]: 3684/6327 cut-off events. [2024-06-27 19:21:12,463 INFO L125 PetriNetUnfolderBase]: For 678888/678892 co-relation queries the response was YES. [2024-06-27 19:21:12,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51530 conditions, 6327 events. 3684/6327 cut-off events. For 678888/678892 co-relation queries the response was YES. Maximal size of possible extension queue 382. Compared 44125 event pairs, 1121 based on Foata normal form. 2/6324 useless extension candidates. Maximal degree in co-relation 51374. Up to 5400 conditions per place. [2024-06-27 19:21:12,536 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 294 selfloop transitions, 199 changer transitions 0/500 dead transitions. [2024-06-27 19:21:12,536 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 500 transitions, 9393 flow [2024-06-27 19:21:12,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 19:21:12,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 19:21:12,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 263 transitions. [2024-06-27 19:21:12,537 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5479166666666667 [2024-06-27 19:21:12,537 INFO L175 Difference]: Start difference. First operand has 336 places, 474 transitions, 8131 flow. Second operand 12 states and 263 transitions. [2024-06-27 19:21:12,537 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 500 transitions, 9393 flow [2024-06-27 19:21:14,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 500 transitions, 8973 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-06-27 19:21:14,719 INFO L231 Difference]: Finished difference. Result has 340 places, 477 transitions, 8175 flow [2024-06-27 19:21:14,865 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7717, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=474, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=196, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=278, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=8175, PETRI_PLACES=340, PETRI_TRANSITIONS=477} [2024-06-27 19:21:14,865 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 299 predicate places. [2024-06-27 19:21:14,865 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 477 transitions, 8175 flow [2024-06-27 19:21:14,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:21:14,865 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:21:14,866 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:21:14,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-27 19:21:14,866 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:21:14,866 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:21:14,866 INFO L85 PathProgramCache]: Analyzing trace with hash -57673408, now seen corresponding path program 5 times [2024-06-27 19:21:14,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:21:14,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055407531] [2024-06-27 19:21:14,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:21:14,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:21:14,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:21:14,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:21:14,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:21:14,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055407531] [2024-06-27 19:21:14,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055407531] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:21:14,961 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:21:14,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:21:14,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961295057] [2024-06-27 19:21:14,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:21:14,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:21:14,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:21:14,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:21:14,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:21:15,014 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:21:15,014 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 477 transitions, 8175 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:21:15,014 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:21:15,014 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:21:15,014 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:21:16,130 INFO L124 PetriNetUnfolderBase]: 3681/6327 cut-off events. [2024-06-27 19:21:16,131 INFO L125 PetriNetUnfolderBase]: For 690585/690589 co-relation queries the response was YES. [2024-06-27 19:21:16,183 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51590 conditions, 6327 events. 3681/6327 cut-off events. For 690585/690589 co-relation queries the response was YES. Maximal size of possible extension queue 382. Compared 44154 event pairs, 1123 based on Foata normal form. 2/6324 useless extension candidates. Maximal degree in co-relation 51433. Up to 5397 conditions per place. [2024-06-27 19:21:16,206 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 293 selfloop transitions, 197 changer transitions 0/497 dead transitions. [2024-06-27 19:21:16,206 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 497 transitions, 9203 flow [2024-06-27 19:21:16,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:21:16,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:21:16,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 226 transitions. [2024-06-27 19:21:16,207 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.565 [2024-06-27 19:21:16,207 INFO L175 Difference]: Start difference. First operand has 340 places, 477 transitions, 8175 flow. Second operand 10 states and 226 transitions. [2024-06-27 19:21:16,207 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 497 transitions, 9203 flow [2024-06-27 19:21:18,479 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 338 places, 497 transitions, 8612 flow, removed 24 selfloop flow, removed 11 redundant places. [2024-06-27 19:21:18,485 INFO L231 Difference]: Finished difference. Result has 339 places, 477 transitions, 7985 flow [2024-06-27 19:21:18,485 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7584, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=477, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=197, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7985, PETRI_PLACES=339, PETRI_TRANSITIONS=477} [2024-06-27 19:21:18,486 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 298 predicate places. [2024-06-27 19:21:18,486 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 477 transitions, 7985 flow [2024-06-27 19:21:18,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:21:18,486 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:21:18,486 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:21:18,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-27 19:21:18,486 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:21:18,487 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:21:18,487 INFO L85 PathProgramCache]: Analyzing trace with hash 1883196275, now seen corresponding path program 3 times [2024-06-27 19:21:18,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:21:18,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959133474] [2024-06-27 19:21:18,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:21:18,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:21:18,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:21:18,571 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:21:18,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:21:18,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959133474] [2024-06-27 19:21:18,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959133474] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:21:18,571 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:21:18,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:21:18,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631281888] [2024-06-27 19:21:18,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:21:18,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:21:18,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:21:18,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:21:18,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:21:18,621 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:21:18,621 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 477 transitions, 7985 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:21:18,621 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:21:18,621 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:21:18,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:21:19,765 INFO L124 PetriNetUnfolderBase]: 3748/6422 cut-off events. [2024-06-27 19:21:19,765 INFO L125 PetriNetUnfolderBase]: For 747181/747188 co-relation queries the response was YES. [2024-06-27 19:21:19,818 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53304 conditions, 6422 events. 3748/6422 cut-off events. For 747181/747188 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 44841 event pairs, 1124 based on Foata normal form. 8/6427 useless extension candidates. Maximal degree in co-relation 53146. Up to 5550 conditions per place. [2024-06-27 19:21:19,841 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 346 selfloop transitions, 158 changer transitions 0/511 dead transitions. [2024-06-27 19:21:19,841 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 511 transitions, 9401 flow [2024-06-27 19:21:19,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:21:19,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:21:19,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-27 19:21:19,842 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.60625 [2024-06-27 19:21:19,842 INFO L175 Difference]: Start difference. First operand has 339 places, 477 transitions, 7985 flow. Second operand 8 states and 194 transitions. [2024-06-27 19:21:19,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 511 transitions, 9401 flow [2024-06-27 19:21:21,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 511 transitions, 9007 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-27 19:21:21,961 INFO L231 Difference]: Finished difference. Result has 338 places, 481 transitions, 8060 flow [2024-06-27 19:21:21,962 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7591, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=477, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=156, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=321, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8060, PETRI_PLACES=338, PETRI_TRANSITIONS=481} [2024-06-27 19:21:21,962 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 297 predicate places. [2024-06-27 19:21:21,962 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 481 transitions, 8060 flow [2024-06-27 19:21:21,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:21:21,962 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:21:21,962 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:21:21,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-27 19:21:21,962 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:21:21,963 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:21:21,964 INFO L85 PathProgramCache]: Analyzing trace with hash 1387804547, now seen corresponding path program 4 times [2024-06-27 19:21:21,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:21:21,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251837147] [2024-06-27 19:21:21,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:21:21,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:21:21,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:21:22,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:21:22,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:21:22,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251837147] [2024-06-27 19:21:22,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251837147] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:21:22,045 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:21:22,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:21:22,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170798995] [2024-06-27 19:21:22,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:21:22,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:21:22,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:21:22,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:21:22,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:21:22,082 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:21:22,083 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 481 transitions, 8060 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:21:22,083 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:21:22,083 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:21:22,083 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:21:23,282 INFO L124 PetriNetUnfolderBase]: 3756/6439 cut-off events. [2024-06-27 19:21:23,282 INFO L125 PetriNetUnfolderBase]: For 765406/765413 co-relation queries the response was YES. [2024-06-27 19:21:23,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53694 conditions, 6439 events. 3756/6439 cut-off events. For 765406/765413 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 44961 event pairs, 1131 based on Foata normal form. 8/6444 useless extension candidates. Maximal degree in co-relation 53535. Up to 5651 conditions per place. [2024-06-27 19:21:23,362 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 343 selfloop transitions, 155 changer transitions 0/505 dead transitions. [2024-06-27 19:21:23,363 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 505 transitions, 9186 flow [2024-06-27 19:21:23,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:21:23,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:21:23,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 186 transitions. [2024-06-27 19:21:23,363 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.58125 [2024-06-27 19:21:23,364 INFO L175 Difference]: Start difference. First operand has 338 places, 481 transitions, 8060 flow. Second operand 8 states and 186 transitions. [2024-06-27 19:21:23,365 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 505 transitions, 9186 flow [2024-06-27 19:21:25,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 505 transitions, 8898 flow, removed 48 selfloop flow, removed 4 redundant places. [2024-06-27 19:21:25,781 INFO L231 Difference]: Finished difference. Result has 342 places, 483 transitions, 8167 flow [2024-06-27 19:21:25,782 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7786, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=481, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=326, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8167, PETRI_PLACES=342, PETRI_TRANSITIONS=483} [2024-06-27 19:21:25,782 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 301 predicate places. [2024-06-27 19:21:25,782 INFO L495 AbstractCegarLoop]: Abstraction has has 342 places, 483 transitions, 8167 flow [2024-06-27 19:21:25,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:21:25,782 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:21:25,782 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:21:25,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-27 19:21:25,783 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:21:25,783 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:21:25,783 INFO L85 PathProgramCache]: Analyzing trace with hash 1031628675, now seen corresponding path program 5 times [2024-06-27 19:21:25,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:21:25,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300172462] [2024-06-27 19:21:25,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:21:25,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:21:25,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:21:25,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:21:25,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:21:25,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300172462] [2024-06-27 19:21:25,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300172462] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:21:25,869 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:21:25,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:21:25,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201240273] [2024-06-27 19:21:25,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:21:25,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:21:25,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:21:25,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:21:25,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:21:25,936 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:21:25,936 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 342 places, 483 transitions, 8167 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:21:25,936 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:21:25,936 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:21:25,936 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:21:27,215 INFO L124 PetriNetUnfolderBase]: 3856/6591 cut-off events. [2024-06-27 19:21:27,215 INFO L125 PetriNetUnfolderBase]: For 840801/840808 co-relation queries the response was YES. [2024-06-27 19:21:27,264 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56462 conditions, 6591 events. 3856/6591 cut-off events. For 840801/840808 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 46069 event pairs, 1033 based on Foata normal form. 8/6596 useless extension candidates. Maximal degree in co-relation 56301. Up to 5332 conditions per place. [2024-06-27 19:21:27,285 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 333 selfloop transitions, 183 changer transitions 0/523 dead transitions. [2024-06-27 19:21:27,286 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 523 transitions, 9849 flow [2024-06-27 19:21:27,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:21:27,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:21:27,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-06-27 19:21:27,287 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.61875 [2024-06-27 19:21:27,287 INFO L175 Difference]: Start difference. First operand has 342 places, 483 transitions, 8167 flow. Second operand 8 states and 198 transitions. [2024-06-27 19:21:27,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 523 transitions, 9849 flow [2024-06-27 19:21:30,139 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 523 transitions, 9488 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-27 19:21:30,145 INFO L231 Difference]: Finished difference. Result has 344 places, 488 transitions, 8357 flow [2024-06-27 19:21:30,145 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7806, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=483, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=180, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=303, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8357, PETRI_PLACES=344, PETRI_TRANSITIONS=488} [2024-06-27 19:21:30,145 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 303 predicate places. [2024-06-27 19:21:30,146 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 488 transitions, 8357 flow [2024-06-27 19:21:30,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:21:30,146 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:21:30,146 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:21:30,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-27 19:21:30,146 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:21:30,146 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:21:30,146 INFO L85 PathProgramCache]: Analyzing trace with hash 1541305203, now seen corresponding path program 6 times [2024-06-27 19:21:30,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:21:30,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937368923] [2024-06-27 19:21:30,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:21:30,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:21:30,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:21:30,229 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:21:30,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:21:30,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937368923] [2024-06-27 19:21:30,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937368923] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:21:30,230 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:21:30,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:21:30,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203861597] [2024-06-27 19:21:30,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:21:30,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:21:30,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:21:30,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:21:30,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:21:30,280 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:21:30,280 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 488 transitions, 8357 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:21:30,280 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:21:30,280 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:21:30,281 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:21:31,501 INFO L124 PetriNetUnfolderBase]: 3864/6607 cut-off events. [2024-06-27 19:21:31,501 INFO L125 PetriNetUnfolderBase]: For 862369/862376 co-relation queries the response was YES. [2024-06-27 19:21:31,558 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57079 conditions, 6607 events. 3864/6607 cut-off events. For 862369/862376 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 46256 event pairs, 1061 based on Foata normal form. 8/6612 useless extension candidates. Maximal degree in co-relation 56917. Up to 5340 conditions per place. [2024-06-27 19:21:31,582 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 326 selfloop transitions, 185 changer transitions 0/518 dead transitions. [2024-06-27 19:21:31,582 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 518 transitions, 9723 flow [2024-06-27 19:21:31,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:21:31,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:21:31,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-27 19:21:31,583 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.596875 [2024-06-27 19:21:31,583 INFO L175 Difference]: Start difference. First operand has 344 places, 488 transitions, 8357 flow. Second operand 8 states and 191 transitions. [2024-06-27 19:21:31,583 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 518 transitions, 9723 flow [2024-06-27 19:21:34,067 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 348 places, 518 transitions, 9423 flow, removed 58 selfloop flow, removed 3 redundant places. [2024-06-27 19:21:34,074 INFO L231 Difference]: Finished difference. Result has 349 places, 490 transitions, 8512 flow [2024-06-27 19:21:34,074 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8075, PETRI_DIFFERENCE_MINUEND_PLACES=341, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=488, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=183, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=305, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8512, PETRI_PLACES=349, PETRI_TRANSITIONS=490} [2024-06-27 19:21:34,074 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 308 predicate places. [2024-06-27 19:21:34,074 INFO L495 AbstractCegarLoop]: Abstraction has has 349 places, 490 transitions, 8512 flow [2024-06-27 19:21:34,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:21:34,075 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:21:34,075 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:21:34,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-27 19:21:34,075 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:21:34,075 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:21:34,075 INFO L85 PathProgramCache]: Analyzing trace with hash 1255014933, now seen corresponding path program 7 times [2024-06-27 19:21:34,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:21:34,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053291806] [2024-06-27 19:21:34,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:21:34,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:21:34,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:21:34,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:21:34,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:21:34,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053291806] [2024-06-27 19:21:34,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053291806] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:21:34,163 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:21:34,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:21:34,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339336448] [2024-06-27 19:21:34,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:21:34,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:21:34,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:21:34,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:21:34,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:21:34,223 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:21:34,223 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 490 transitions, 8512 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:21:34,223 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:21:34,223 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:21:34,223 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:21:35,412 INFO L124 PetriNetUnfolderBase]: 3872/6619 cut-off events. [2024-06-27 19:21:35,412 INFO L125 PetriNetUnfolderBase]: For 878607/878614 co-relation queries the response was YES. [2024-06-27 19:21:35,470 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57561 conditions, 6619 events. 3872/6619 cut-off events. For 878607/878614 co-relation queries the response was YES. Maximal size of possible extension queue 402. Compared 46322 event pairs, 1173 based on Foata normal form. 8/6624 useless extension candidates. Maximal degree in co-relation 57397. Up to 5827 conditions per place. [2024-06-27 19:21:35,493 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 349 selfloop transitions, 155 changer transitions 0/511 dead transitions. [2024-06-27 19:21:35,494 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 511 transitions, 9640 flow [2024-06-27 19:21:35,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:21:35,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:21:35,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 182 transitions. [2024-06-27 19:21:35,494 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.56875 [2024-06-27 19:21:35,495 INFO L175 Difference]: Start difference. First operand has 349 places, 490 transitions, 8512 flow. Second operand 8 states and 182 transitions. [2024-06-27 19:21:35,495 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 511 transitions, 9640 flow [2024-06-27 19:21:38,795 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 511 transitions, 9273 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-06-27 19:21:38,802 INFO L231 Difference]: Finished difference. Result has 352 places, 492 transitions, 8538 flow [2024-06-27 19:21:38,802 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8147, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=490, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=335, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8538, PETRI_PLACES=352, PETRI_TRANSITIONS=492} [2024-06-27 19:21:38,802 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 311 predicate places. [2024-06-27 19:21:38,802 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 492 transitions, 8538 flow [2024-06-27 19:21:38,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:21:38,802 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:21:38,802 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:21:38,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-27 19:21:38,803 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:21:38,803 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:21:38,803 INFO L85 PathProgramCache]: Analyzing trace with hash -506372221, now seen corresponding path program 8 times [2024-06-27 19:21:38,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:21:38,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220449079] [2024-06-27 19:21:38,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:21:38,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:21:38,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:21:38,887 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:21:38,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:21:38,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220449079] [2024-06-27 19:21:38,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220449079] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:21:38,887 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:21:38,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:21:38,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422316356] [2024-06-27 19:21:38,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:21:38,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:21:38,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:21:38,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:21:38,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:21:38,929 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:21:38,929 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 492 transitions, 8538 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:21:38,929 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:21:38,929 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:21:38,930 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:21:40,148 INFO L124 PetriNetUnfolderBase]: 3880/6629 cut-off events. [2024-06-27 19:21:40,149 INFO L125 PetriNetUnfolderBase]: For 898003/898010 co-relation queries the response was YES. [2024-06-27 19:21:40,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57699 conditions, 6629 events. 3880/6629 cut-off events. For 898003/898010 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 46464 event pairs, 1171 based on Foata normal form. 8/6632 useless extension candidates. Maximal degree in co-relation 57534. Up to 5811 conditions per place. [2024-06-27 19:21:40,236 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 345 selfloop transitions, 162 changer transitions 0/514 dead transitions. [2024-06-27 19:21:40,236 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 514 transitions, 9664 flow [2024-06-27 19:21:40,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:21:40,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:21:40,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 183 transitions. [2024-06-27 19:21:40,237 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.571875 [2024-06-27 19:21:40,237 INFO L175 Difference]: Start difference. First operand has 352 places, 492 transitions, 8538 flow. Second operand 8 states and 183 transitions. [2024-06-27 19:21:40,238 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 514 transitions, 9664 flow [2024-06-27 19:21:43,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 353 places, 514 transitions, 9299 flow, removed 29 selfloop flow, removed 6 redundant places. [2024-06-27 19:21:43,452 INFO L231 Difference]: Finished difference. Result has 354 places, 494 transitions, 8570 flow [2024-06-27 19:21:43,452 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8173, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=492, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=160, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=330, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8570, PETRI_PLACES=354, PETRI_TRANSITIONS=494} [2024-06-27 19:21:43,452 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 313 predicate places. [2024-06-27 19:21:43,452 INFO L495 AbstractCegarLoop]: Abstraction has has 354 places, 494 transitions, 8570 flow [2024-06-27 19:21:43,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:21:43,453 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:21:43,453 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:21:43,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-27 19:21:43,453 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:21:43,453 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:21:43,453 INFO L85 PathProgramCache]: Analyzing trace with hash 1378543514, now seen corresponding path program 6 times [2024-06-27 19:21:43,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:21:43,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475886980] [2024-06-27 19:21:43,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:21:43,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:21:43,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:21:43,545 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:21:43,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:21:43,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475886980] [2024-06-27 19:21:43,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475886980] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:21:43,546 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:21:43,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:21:43,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679636117] [2024-06-27 19:21:43,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:21:43,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:21:43,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:21:43,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:21:43,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:21:43,585 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:21:43,586 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 354 places, 494 transitions, 8570 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:21:43,586 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:21:43,586 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:21:43,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:21:44,830 INFO L124 PetriNetUnfolderBase]: 3885/6633 cut-off events. [2024-06-27 19:21:44,830 INFO L125 PetriNetUnfolderBase]: For 912712/912716 co-relation queries the response was YES. [2024-06-27 19:21:44,887 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57950 conditions, 6633 events. 3885/6633 cut-off events. For 912712/912716 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 46344 event pairs, 1184 based on Foata normal form. 2/6630 useless extension candidates. Maximal degree in co-relation 57784. Up to 5527 conditions per place. [2024-06-27 19:21:44,912 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 238 selfloop transitions, 279 changer transitions 0/524 dead transitions. [2024-06-27 19:21:44,912 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 524 transitions, 10092 flow [2024-06-27 19:21:44,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:21:44,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:21:44,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 214 transitions. [2024-06-27 19:21:44,913 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5944444444444444 [2024-06-27 19:21:44,913 INFO L175 Difference]: Start difference. First operand has 354 places, 494 transitions, 8570 flow. Second operand 9 states and 214 transitions. [2024-06-27 19:21:44,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 524 transitions, 10092 flow [2024-06-27 19:21:48,004 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 356 places, 524 transitions, 9717 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-27 19:21:48,011 INFO L231 Difference]: Finished difference. Result has 357 places, 497 transitions, 8825 flow [2024-06-27 19:21:48,011 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8195, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=494, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=276, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8825, PETRI_PLACES=357, PETRI_TRANSITIONS=497} [2024-06-27 19:21:48,011 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 316 predicate places. [2024-06-27 19:21:48,011 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 497 transitions, 8825 flow [2024-06-27 19:21:48,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:21:48,012 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:21:48,012 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:21:48,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-27 19:21:48,012 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:21:48,012 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:21:48,012 INFO L85 PathProgramCache]: Analyzing trace with hash 1387809104, now seen corresponding path program 7 times [2024-06-27 19:21:48,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:21:48,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144825315] [2024-06-27 19:21:48,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:21:48,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:21:48,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:21:48,103 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 19:21:48,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:21:48,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144825315] [2024-06-27 19:21:48,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144825315] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:21:48,104 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:21:48,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:21:48,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269841644] [2024-06-27 19:21:48,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:21:48,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:21:48,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:21:48,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:21:48,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:21:48,145 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:21:48,146 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 497 transitions, 8825 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:21:48,146 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:21:48,146 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:21:48,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:21:49,447 INFO L124 PetriNetUnfolderBase]: 3898/6659 cut-off events. [2024-06-27 19:21:49,447 INFO L125 PetriNetUnfolderBase]: For 937185/937189 co-relation queries the response was YES. [2024-06-27 19:21:49,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58670 conditions, 6659 events. 3898/6659 cut-off events. For 937185/937189 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 46660 event pairs, 1186 based on Foata normal form. 2/6656 useless extension candidates. Maximal degree in co-relation 58503. Up to 5542 conditions per place. [2024-06-27 19:21:49,529 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 239 selfloop transitions, 282 changer transitions 0/528 dead transitions. [2024-06-27 19:21:49,529 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 365 places, 528 transitions, 10611 flow [2024-06-27 19:21:49,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:21:49,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:21:49,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 213 transitions. [2024-06-27 19:21:49,530 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5916666666666667 [2024-06-27 19:21:49,530 INFO L175 Difference]: Start difference. First operand has 357 places, 497 transitions, 8825 flow. Second operand 9 states and 213 transitions. [2024-06-27 19:21:49,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 365 places, 528 transitions, 10611 flow [2024-06-27 19:21:52,806 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 528 transitions, 9808 flow, removed 24 selfloop flow, removed 8 redundant places. [2024-06-27 19:21:52,812 INFO L231 Difference]: Finished difference. Result has 358 places, 503 transitions, 8736 flow [2024-06-27 19:21:52,813 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8040, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=497, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=276, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8736, PETRI_PLACES=358, PETRI_TRANSITIONS=503} [2024-06-27 19:21:52,813 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 317 predicate places. [2024-06-27 19:21:52,813 INFO L495 AbstractCegarLoop]: Abstraction has has 358 places, 503 transitions, 8736 flow [2024-06-27 19:21:52,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:21:52,813 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:21:52,813 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:21:52,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-27 19:21:52,814 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:21:52,814 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:21:52,814 INFO L85 PathProgramCache]: Analyzing trace with hash 1387797944, now seen corresponding path program 8 times [2024-06-27 19:21:52,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:21:52,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347832793] [2024-06-27 19:21:52,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:21:52,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:21:52,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:21:52,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:21:52,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:21:52,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347832793] [2024-06-27 19:21:52,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347832793] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:21:52,903 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:21:52,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:21:52,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543222984] [2024-06-27 19:21:52,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:21:52,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:21:52,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:21:52,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:21:52,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:21:52,960 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:21:52,960 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 358 places, 503 transitions, 8736 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:21:52,960 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:21:52,960 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:21:52,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:21:54,211 INFO L124 PetriNetUnfolderBase]: 3895/6651 cut-off events. [2024-06-27 19:21:54,211 INFO L125 PetriNetUnfolderBase]: For 951305/951309 co-relation queries the response was YES. [2024-06-27 19:21:54,270 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58609 conditions, 6651 events. 3895/6651 cut-off events. For 951305/951309 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 46573 event pairs, 1184 based on Foata normal form. 2/6648 useless extension candidates. Maximal degree in co-relation 58441. Up to 5539 conditions per place. [2024-06-27 19:21:54,295 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 239 selfloop transitions, 283 changer transitions 0/529 dead transitions. [2024-06-27 19:21:54,295 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 529 transitions, 10206 flow [2024-06-27 19:21:54,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 19:21:54,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 19:21:54,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 248 transitions. [2024-06-27 19:21:54,296 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5636363636363636 [2024-06-27 19:21:54,296 INFO L175 Difference]: Start difference. First operand has 358 places, 503 transitions, 8736 flow. Second operand 11 states and 248 transitions. [2024-06-27 19:21:54,296 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 529 transitions, 10206 flow [2024-06-27 19:21:57,357 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 529 transitions, 9737 flow, removed 46 selfloop flow, removed 5 redundant places. [2024-06-27 19:21:57,364 INFO L231 Difference]: Finished difference. Result has 364 places, 503 transitions, 8839 flow [2024-06-27 19:21:57,364 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8267, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=503, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=283, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8839, PETRI_PLACES=364, PETRI_TRANSITIONS=503} [2024-06-27 19:21:57,364 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 323 predicate places. [2024-06-27 19:21:57,364 INFO L495 AbstractCegarLoop]: Abstraction has has 364 places, 503 transitions, 8839 flow [2024-06-27 19:21:57,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:21:57,365 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:21:57,365 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:21:57,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-27 19:21:57,365 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:21:57,365 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:21:57,365 INFO L85 PathProgramCache]: Analyzing trace with hash -502051534, now seen corresponding path program 9 times [2024-06-27 19:21:57,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:21:57,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36752188] [2024-06-27 19:21:57,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:21:57,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:21:57,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:21:57,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:21:57,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:21:57,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36752188] [2024-06-27 19:21:57,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36752188] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:21:57,452 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:21:57,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:21:57,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435518846] [2024-06-27 19:21:57,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:21:57,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:21:57,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:21:57,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:21:57,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=40, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:21:57,491 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:21:57,492 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 364 places, 503 transitions, 8839 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:21:57,492 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:21:57,492 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:21:57,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:21:58,740 INFO L124 PetriNetUnfolderBase]: 3900/6660 cut-off events. [2024-06-27 19:21:58,740 INFO L125 PetriNetUnfolderBase]: For 973020/973024 co-relation queries the response was YES. [2024-06-27 19:21:58,799 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58920 conditions, 6660 events. 3900/6660 cut-off events. For 973020/973024 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 46668 event pairs, 1184 based on Foata normal form. 2/6657 useless extension candidates. Maximal degree in co-relation 58751. Up to 5545 conditions per place. [2024-06-27 19:21:58,823 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 233 selfloop transitions, 288 changer transitions 0/528 dead transitions. [2024-06-27 19:21:58,823 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 528 transitions, 10557 flow [2024-06-27 19:21:58,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:21:58,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:21:58,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 209 transitions. [2024-06-27 19:21:58,824 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5805555555555556 [2024-06-27 19:21:58,824 INFO L175 Difference]: Start difference. First operand has 364 places, 503 transitions, 8839 flow. Second operand 9 states and 209 transitions. [2024-06-27 19:21:58,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 528 transitions, 10557 flow [2024-06-27 19:22:02,630 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 528 transitions, 9789 flow, removed 2 selfloop flow, removed 11 redundant places. [2024-06-27 19:22:02,637 INFO L231 Difference]: Finished difference. Result has 362 places, 506 transitions, 8725 flow [2024-06-27 19:22:02,637 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8080, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=503, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=285, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8725, PETRI_PLACES=362, PETRI_TRANSITIONS=506} [2024-06-27 19:22:02,637 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 321 predicate places. [2024-06-27 19:22:02,637 INFO L495 AbstractCegarLoop]: Abstraction has has 362 places, 506 transitions, 8725 flow [2024-06-27 19:22:02,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:22:02,638 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:22:02,638 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:22:02,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-27 19:22:02,638 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:22:02,638 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:22:02,638 INFO L85 PathProgramCache]: Analyzing trace with hash -514938544, now seen corresponding path program 10 times [2024-06-27 19:22:02,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:22:02,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156288243] [2024-06-27 19:22:02,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:22:02,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:22:02,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:22:02,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:22:02,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:22:02,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156288243] [2024-06-27 19:22:02,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156288243] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:22:02,728 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:22:02,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:22:02,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463203643] [2024-06-27 19:22:02,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:22:02,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:22:02,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:22:02,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:22:02,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:22:02,777 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:22:02,777 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 506 transitions, 8725 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:22:02,777 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:22:02,777 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:22:02,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:22:04,084 INFO L124 PetriNetUnfolderBase]: 3905/6669 cut-off events. [2024-06-27 19:22:04,084 INFO L125 PetriNetUnfolderBase]: For 991405/991409 co-relation queries the response was YES. [2024-06-27 19:22:04,139 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59128 conditions, 6669 events. 3905/6669 cut-off events. For 991405/991409 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 46717 event pairs, 1184 based on Foata normal form. 2/6666 useless extension candidates. Maximal degree in co-relation 58958. Up to 5551 conditions per place. [2024-06-27 19:22:04,162 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 233 selfloop transitions, 291 changer transitions 0/531 dead transitions. [2024-06-27 19:22:04,162 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 531 transitions, 10452 flow [2024-06-27 19:22:04,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:22:04,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:22:04,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 209 transitions. [2024-06-27 19:22:04,163 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5805555555555556 [2024-06-27 19:22:04,163 INFO L175 Difference]: Start difference. First operand has 362 places, 506 transitions, 8725 flow. Second operand 9 states and 209 transitions. [2024-06-27 19:22:04,163 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 531 transitions, 10452 flow [2024-06-27 19:22:07,607 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 531 transitions, 9692 flow, removed 40 selfloop flow, removed 7 redundant places. [2024-06-27 19:22:07,613 INFO L231 Difference]: Finished difference. Result has 364 places, 509 transitions, 8622 flow [2024-06-27 19:22:07,614 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7984, PETRI_DIFFERENCE_MINUEND_PLACES=355, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=506, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=288, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8622, PETRI_PLACES=364, PETRI_TRANSITIONS=509} [2024-06-27 19:22:07,614 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 323 predicate places. [2024-06-27 19:22:07,614 INFO L495 AbstractCegarLoop]: Abstraction has has 364 places, 509 transitions, 8622 flow [2024-06-27 19:22:07,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:22:07,614 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:22:07,614 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:22:07,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-27 19:22:07,615 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:22:07,615 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:22:07,615 INFO L85 PathProgramCache]: Analyzing trace with hash -514949704, now seen corresponding path program 11 times [2024-06-27 19:22:07,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:22:07,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12859678] [2024-06-27 19:22:07,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:22:07,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:22:07,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:22:07,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:22:07,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:22:07,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12859678] [2024-06-27 19:22:07,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12859678] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:22:07,706 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:22:07,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:22:07,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630283641] [2024-06-27 19:22:07,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:22:07,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:22:07,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:22:07,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:22:07,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:22:07,771 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:22:07,771 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 364 places, 509 transitions, 8622 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:22:07,771 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:22:07,771 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:22:07,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:22:09,025 INFO L124 PetriNetUnfolderBase]: 3902/6665 cut-off events. [2024-06-27 19:22:09,025 INFO L125 PetriNetUnfolderBase]: For 1006793/1006797 co-relation queries the response was YES. [2024-06-27 19:22:09,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58724 conditions, 6665 events. 3902/6665 cut-off events. For 1006793/1006797 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 46741 event pairs, 1184 based on Foata normal form. 2/6662 useless extension candidates. Maximal degree in co-relation 58554. Up to 5548 conditions per place. [2024-06-27 19:22:09,108 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 233 selfloop transitions, 292 changer transitions 0/532 dead transitions. [2024-06-27 19:22:09,108 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 532 transitions, 10102 flow [2024-06-27 19:22:09,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 19:22:09,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 19:22:09,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 242 transitions. [2024-06-27 19:22:09,109 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.55 [2024-06-27 19:22:09,109 INFO L175 Difference]: Start difference. First operand has 364 places, 509 transitions, 8622 flow. Second operand 11 states and 242 transitions. [2024-06-27 19:22:09,109 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 532 transitions, 10102 flow [2024-06-27 19:22:12,936 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 532 transitions, 9242 flow, removed 30 selfloop flow, removed 8 redundant places. [2024-06-27 19:22:12,942 INFO L231 Difference]: Finished difference. Result has 367 places, 509 transitions, 8352 flow [2024-06-27 19:22:12,942 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7762, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=509, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=292, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8352, PETRI_PLACES=367, PETRI_TRANSITIONS=509} [2024-06-27 19:22:12,943 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 326 predicate places. [2024-06-27 19:22:12,943 INFO L495 AbstractCegarLoop]: Abstraction has has 367 places, 509 transitions, 8352 flow [2024-06-27 19:22:12,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:22:12,943 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:22:12,944 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:22:12,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-27 19:22:12,945 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:22:12,945 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:22:12,945 INFO L85 PathProgramCache]: Analyzing trace with hash -1389278427, now seen corresponding path program 9 times [2024-06-27 19:22:12,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:22:12,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961575541] [2024-06-27 19:22:12,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:22:12,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:22:12,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:22:13,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:22:13,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:22:13,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961575541] [2024-06-27 19:22:13,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961575541] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:22:13,062 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:22:13,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:22:13,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21042649] [2024-06-27 19:22:13,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:22:13,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:22:13,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:22:13,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:22:13,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:22:13,107 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:22:13,108 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 509 transitions, 8352 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:22:13,108 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:22:13,108 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:22:13,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:22:14,388 INFO L124 PetriNetUnfolderBase]: 3938/6728 cut-off events. [2024-06-27 19:22:14,388 INFO L125 PetriNetUnfolderBase]: For 1067794/1067801 co-relation queries the response was YES. [2024-06-27 19:22:14,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59275 conditions, 6728 events. 3938/6728 cut-off events. For 1067794/1067801 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 47260 event pairs, 1176 based on Foata normal form. 16/6741 useless extension candidates. Maximal degree in co-relation 59104. Up to 6040 conditions per place. [2024-06-27 19:22:14,474 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 461 selfloop transitions, 63 changer transitions 0/531 dead transitions. [2024-06-27 19:22:14,474 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 531 transitions, 9548 flow [2024-06-27 19:22:14,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:22:14,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:22:14,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 199 transitions. [2024-06-27 19:22:14,475 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5527777777777778 [2024-06-27 19:22:14,475 INFO L175 Difference]: Start difference. First operand has 367 places, 509 transitions, 8352 flow. Second operand 9 states and 199 transitions. [2024-06-27 19:22:14,475 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 531 transitions, 9548 flow [2024-06-27 19:22:17,967 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 365 places, 531 transitions, 8956 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-27 19:22:17,973 INFO L231 Difference]: Finished difference. Result has 366 places, 511 transitions, 7972 flow [2024-06-27 19:22:17,974 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7760, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=509, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=446, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7972, PETRI_PLACES=366, PETRI_TRANSITIONS=511} [2024-06-27 19:22:17,974 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 325 predicate places. [2024-06-27 19:22:17,974 INFO L495 AbstractCegarLoop]: Abstraction has has 366 places, 511 transitions, 7972 flow [2024-06-27 19:22:17,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:22:17,974 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:22:17,975 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:22:17,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-27 19:22:17,975 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:22:17,975 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:22:17,975 INFO L85 PathProgramCache]: Analyzing trace with hash -1380707547, now seen corresponding path program 10 times [2024-06-27 19:22:17,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:22:17,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919288922] [2024-06-27 19:22:17,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:22:17,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:22:17,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:22:18,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:22:18,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:22:18,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919288922] [2024-06-27 19:22:18,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919288922] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:22:18,070 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:22:18,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:22:18,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088277368] [2024-06-27 19:22:18,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:22:18,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:22:18,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:22:18,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:22:18,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:22:18,126 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:22:18,127 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 366 places, 511 transitions, 7972 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:22:18,127 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:22:18,127 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:22:18,127 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:22:19,480 INFO L124 PetriNetUnfolderBase]: 4020/6844 cut-off events. [2024-06-27 19:22:19,481 INFO L125 PetriNetUnfolderBase]: For 1127089/1127096 co-relation queries the response was YES. [2024-06-27 19:22:19,538 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60709 conditions, 6844 events. 4020/6844 cut-off events. For 1127089/1127096 co-relation queries the response was YES. Maximal size of possible extension queue 428. Compared 48076 event pairs, 1180 based on Foata normal form. 16/6853 useless extension candidates. Maximal degree in co-relation 60537. Up to 6018 conditions per place. [2024-06-27 19:22:19,563 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 463 selfloop transitions, 69 changer transitions 0/539 dead transitions. [2024-06-27 19:22:19,563 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 539 transitions, 9431 flow [2024-06-27 19:22:19,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:22:19,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:22:19,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 203 transitions. [2024-06-27 19:22:19,564 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5638888888888889 [2024-06-27 19:22:19,564 INFO L175 Difference]: Start difference. First operand has 366 places, 511 transitions, 7972 flow. Second operand 9 states and 203 transitions. [2024-06-27 19:22:19,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 539 transitions, 9431 flow [2024-06-27 19:22:22,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 539 transitions, 9259 flow, removed 25 selfloop flow, removed 7 redundant places. [2024-06-27 19:22:22,708 INFO L231 Difference]: Finished difference. Result has 369 places, 514 transitions, 8059 flow [2024-06-27 19:22:22,708 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7800, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=511, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=442, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8059, PETRI_PLACES=369, PETRI_TRANSITIONS=514} [2024-06-27 19:22:22,708 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 328 predicate places. [2024-06-27 19:22:22,709 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 514 transitions, 8059 flow [2024-06-27 19:22:22,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:22:22,709 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:22:22,709 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:22:22,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-27 19:22:22,709 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:22:22,709 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:22:22,709 INFO L85 PathProgramCache]: Analyzing trace with hash -1203687999, now seen corresponding path program 1 times [2024-06-27 19:22:22,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:22:22,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571660534] [2024-06-27 19:22:22,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:22:22,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:22:22,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:22:22,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:22:22,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:22:22,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571660534] [2024-06-27 19:22:22,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571660534] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:22:22,809 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:22:22,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:22:22,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916626096] [2024-06-27 19:22:22,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:22:22,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:22:22,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:22:22,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:22:22,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:22:22,862 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:22:22,862 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 514 transitions, 8059 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:22:22,862 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:22:22,862 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:22:22,862 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:22:24,193 INFO L124 PetriNetUnfolderBase]: 4056/6906 cut-off events. [2024-06-27 19:22:24,193 INFO L125 PetriNetUnfolderBase]: For 1149887/1149894 co-relation queries the response was YES. [2024-06-27 19:22:24,257 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61393 conditions, 6906 events. 4056/6906 cut-off events. For 1149887/1149894 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 48584 event pairs, 1210 based on Foata normal form. 16/6919 useless extension candidates. Maximal degree in co-relation 61219. Up to 6222 conditions per place. [2024-06-27 19:22:24,282 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 466 selfloop transitions, 63 changer transitions 0/536 dead transitions. [2024-06-27 19:22:24,282 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 377 places, 536 transitions, 9231 flow [2024-06-27 19:22:24,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:22:24,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:22:24,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 199 transitions. [2024-06-27 19:22:24,283 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5527777777777778 [2024-06-27 19:22:24,283 INFO L175 Difference]: Start difference. First operand has 369 places, 514 transitions, 8059 flow. Second operand 9 states and 199 transitions. [2024-06-27 19:22:24,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 377 places, 536 transitions, 9231 flow [2024-06-27 19:22:27,508 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 536 transitions, 9063 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-27 19:22:27,514 INFO L231 Difference]: Finished difference. Result has 372 places, 516 transitions, 8069 flow [2024-06-27 19:22:27,515 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7891, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=514, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=451, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8069, PETRI_PLACES=372, PETRI_TRANSITIONS=516} [2024-06-27 19:22:27,515 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 331 predicate places. [2024-06-27 19:22:27,515 INFO L495 AbstractCegarLoop]: Abstraction has has 372 places, 516 transitions, 8069 flow [2024-06-27 19:22:27,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:22:27,515 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:22:27,515 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:22:27,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-27 19:22:27,516 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:22:27,516 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:22:27,516 INFO L85 PathProgramCache]: Analyzing trace with hash -1203212769, now seen corresponding path program 2 times [2024-06-27 19:22:27,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:22:27,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376277796] [2024-06-27 19:22:27,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:22:27,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:22:27,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:22:27,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:22:27,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:22:27,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376277796] [2024-06-27 19:22:27,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376277796] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:22:27,607 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:22:27,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:22:27,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530371322] [2024-06-27 19:22:27,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:22:27,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:22:27,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:22:27,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:22:27,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:22:27,657 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:22:27,657 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 372 places, 516 transitions, 8069 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:22:27,658 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:22:27,658 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:22:27,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:22:29,019 INFO L124 PetriNetUnfolderBase]: 4138/7028 cut-off events. [2024-06-27 19:22:29,020 INFO L125 PetriNetUnfolderBase]: For 1212429/1212436 co-relation queries the response was YES. [2024-06-27 19:22:29,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63166 conditions, 7028 events. 4138/7028 cut-off events. For 1212429/1212436 co-relation queries the response was YES. Maximal size of possible extension queue 446. Compared 49533 event pairs, 1216 based on Foata normal form. 16/7041 useless extension candidates. Maximal degree in co-relation 62991. Up to 6164 conditions per place. [2024-06-27 19:22:29,110 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 469 selfloop transitions, 68 changer transitions 0/544 dead transitions. [2024-06-27 19:22:29,111 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 380 places, 544 transitions, 9517 flow [2024-06-27 19:22:29,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:22:29,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:22:29,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 203 transitions. [2024-06-27 19:22:29,111 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5638888888888889 [2024-06-27 19:22:29,111 INFO L175 Difference]: Start difference. First operand has 372 places, 516 transitions, 8069 flow. Second operand 9 states and 203 transitions. [2024-06-27 19:22:29,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 380 places, 544 transitions, 9517 flow [2024-06-27 19:22:32,873 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 373 places, 544 transitions, 9363 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-27 19:22:32,880 INFO L231 Difference]: Finished difference. Result has 374 places, 519 transitions, 8130 flow [2024-06-27 19:22:32,880 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7915, PETRI_DIFFERENCE_MINUEND_PLACES=365, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=516, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=449, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8130, PETRI_PLACES=374, PETRI_TRANSITIONS=519} [2024-06-27 19:22:32,881 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 333 predicate places. [2024-06-27 19:22:32,881 INFO L495 AbstractCegarLoop]: Abstraction has has 374 places, 519 transitions, 8130 flow [2024-06-27 19:22:32,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:22:32,881 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:22:32,881 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:22:32,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-27 19:22:32,881 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:22:32,882 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:22:32,882 INFO L85 PathProgramCache]: Analyzing trace with hash -1389273870, now seen corresponding path program 12 times [2024-06-27 19:22:32,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:22:32,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705789631] [2024-06-27 19:22:32,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:22:32,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:22:32,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:22:32,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:22:32,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:22:32,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705789631] [2024-06-27 19:22:32,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705789631] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:22:32,978 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:22:32,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:22:32,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779815908] [2024-06-27 19:22:32,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:22:32,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:22:32,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:22:32,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:22:32,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:22:33,051 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:22:33,052 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 374 places, 519 transitions, 8130 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:22:33,052 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:22:33,052 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:22:33,052 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:22:34,404 INFO L124 PetriNetUnfolderBase]: 4143/7038 cut-off events. [2024-06-27 19:22:34,404 INFO L125 PetriNetUnfolderBase]: For 1192714/1192718 co-relation queries the response was YES. [2024-06-27 19:22:34,470 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63492 conditions, 7038 events. 4143/7038 cut-off events. For 1192714/1192718 co-relation queries the response was YES. Maximal size of possible extension queue 448. Compared 49644 event pairs, 1248 based on Foata normal form. 2/7035 useless extension candidates. Maximal degree in co-relation 63316. Up to 6259 conditions per place. [2024-06-27 19:22:34,496 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 419 selfloop transitions, 115 changer transitions 0/541 dead transitions. [2024-06-27 19:22:34,496 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 383 places, 541 transitions, 9701 flow [2024-06-27 19:22:34,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:22:34,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:22:34,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 223 transitions. [2024-06-27 19:22:34,497 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5575 [2024-06-27 19:22:34,497 INFO L175 Difference]: Start difference. First operand has 374 places, 519 transitions, 8130 flow. Second operand 10 states and 223 transitions. [2024-06-27 19:22:34,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 383 places, 541 transitions, 9701 flow [2024-06-27 19:22:38,526 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 541 transitions, 9584 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-27 19:22:38,533 INFO L231 Difference]: Finished difference. Result has 379 places, 522 transitions, 8312 flow [2024-06-27 19:22:38,533 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8013, PETRI_DIFFERENCE_MINUEND_PLACES=369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=519, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=407, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8312, PETRI_PLACES=379, PETRI_TRANSITIONS=522} [2024-06-27 19:22:38,533 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 338 predicate places. [2024-06-27 19:22:38,533 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 522 transitions, 8312 flow [2024-06-27 19:22:38,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:22:38,534 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:22:38,534 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:22:38,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-27 19:22:38,534 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:22:38,534 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:22:38,534 INFO L85 PathProgramCache]: Analyzing trace with hash -891036342, now seen corresponding path program 13 times [2024-06-27 19:22:38,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:22:38,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548806372] [2024-06-27 19:22:38,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:22:38,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:22:38,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:22:38,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:22:38,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:22:38,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548806372] [2024-06-27 19:22:38,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548806372] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:22:38,632 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:22:38,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:22:38,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362054813] [2024-06-27 19:22:38,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:22:38,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:22:38,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:22:38,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:22:38,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:22:38,692 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:22:38,692 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 522 transitions, 8312 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:22:38,692 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:22:38,692 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:22:38,693 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:22:40,214 INFO L124 PetriNetUnfolderBase]: 4140/7034 cut-off events. [2024-06-27 19:22:40,214 INFO L125 PetriNetUnfolderBase]: For 1210095/1210099 co-relation queries the response was YES. [2024-06-27 19:22:40,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63623 conditions, 7034 events. 4140/7034 cut-off events. For 1210095/1210099 co-relation queries the response was YES. Maximal size of possible extension queue 448. Compared 49605 event pairs, 1248 based on Foata normal form. 2/7031 useless extension candidates. Maximal degree in co-relation 63445. Up to 6256 conditions per place. [2024-06-27 19:22:40,290 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 419 selfloop transitions, 116 changer transitions 0/542 dead transitions. [2024-06-27 19:22:40,290 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 390 places, 542 transitions, 9628 flow [2024-06-27 19:22:40,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 19:22:40,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 19:22:40,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 257 transitions. [2024-06-27 19:22:40,291 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5354166666666667 [2024-06-27 19:22:40,291 INFO L175 Difference]: Start difference. First operand has 379 places, 522 transitions, 8312 flow. Second operand 12 states and 257 transitions. [2024-06-27 19:22:40,291 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 390 places, 542 transitions, 9628 flow [2024-06-27 19:22:44,647 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 382 places, 542 transitions, 9288 flow, removed 40 selfloop flow, removed 8 redundant places. [2024-06-27 19:22:44,653 INFO L231 Difference]: Finished difference. Result has 383 places, 522 transitions, 8210 flow [2024-06-27 19:22:44,654 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7972, PETRI_DIFFERENCE_MINUEND_PLACES=371, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=522, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=406, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=8210, PETRI_PLACES=383, PETRI_TRANSITIONS=522} [2024-06-27 19:22:44,654 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 342 predicate places. [2024-06-27 19:22:44,654 INFO L495 AbstractCegarLoop]: Abstraction has has 383 places, 522 transitions, 8210 flow [2024-06-27 19:22:44,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:22:44,654 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:22:44,654 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:22:44,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-27 19:22:44,655 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:22:44,655 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:22:44,655 INFO L85 PathProgramCache]: Analyzing trace with hash -719256042, now seen corresponding path program 14 times [2024-06-27 19:22:44,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:22:44,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987809850] [2024-06-27 19:22:44,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:22:44,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:22:44,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:22:44,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:22:44,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:22:44,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987809850] [2024-06-27 19:22:44,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987809850] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:22:44,752 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:22:44,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:22:44,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011253303] [2024-06-27 19:22:44,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:22:44,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:22:44,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:22:44,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:22:44,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:22:44,802 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:22:44,803 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 383 places, 522 transitions, 8210 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:22:44,803 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:22:44,803 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:22:44,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:22:46,203 INFO L124 PetriNetUnfolderBase]: 4145/7047 cut-off events. [2024-06-27 19:22:46,204 INFO L125 PetriNetUnfolderBase]: For 1232560/1232564 co-relation queries the response was YES. [2024-06-27 19:22:46,272 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63847 conditions, 7047 events. 4145/7047 cut-off events. For 1232560/1232564 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 49794 event pairs, 1248 based on Foata normal form. 2/7044 useless extension candidates. Maximal degree in co-relation 63668. Up to 6262 conditions per place. [2024-06-27 19:22:46,298 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 418 selfloop transitions, 118 changer transitions 0/543 dead transitions. [2024-06-27 19:22:46,299 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 392 places, 543 transitions, 9593 flow [2024-06-27 19:22:46,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:22:46,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:22:46,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 222 transitions. [2024-06-27 19:22:46,299 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.555 [2024-06-27 19:22:46,299 INFO L175 Difference]: Start difference. First operand has 383 places, 522 transitions, 8210 flow. Second operand 10 states and 222 transitions. [2024-06-27 19:22:46,299 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 392 places, 543 transitions, 9593 flow [2024-06-27 19:22:51,114 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 543 transitions, 9347 flow, removed 2 selfloop flow, removed 11 redundant places. [2024-06-27 19:22:51,120 INFO L231 Difference]: Finished difference. Result has 382 places, 525 transitions, 8273 flow [2024-06-27 19:22:51,120 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7970, PETRI_DIFFERENCE_MINUEND_PLACES=372, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=522, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=407, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8273, PETRI_PLACES=382, PETRI_TRANSITIONS=525} [2024-06-27 19:22:51,121 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 341 predicate places. [2024-06-27 19:22:51,121 INFO L495 AbstractCegarLoop]: Abstraction has has 382 places, 525 transitions, 8273 flow [2024-06-27 19:22:51,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:22:51,121 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:22:51,121 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:22:51,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-27 19:22:51,121 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:22:51,122 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:22:51,122 INFO L85 PathProgramCache]: Analyzing trace with hash -1217510310, now seen corresponding path program 15 times [2024-06-27 19:22:51,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:22:51,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036726155] [2024-06-27 19:22:51,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:22:51,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:22:51,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:22:51,217 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:22:51,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:22:51,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036726155] [2024-06-27 19:22:51,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036726155] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:22:51,217 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:22:51,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:22:51,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793901202] [2024-06-27 19:22:51,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:22:51,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:22:51,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:22:51,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:22:51,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:22:51,270 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:22:51,271 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 382 places, 525 transitions, 8273 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:22:51,271 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:22:51,271 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:22:51,271 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:22:52,719 INFO L124 PetriNetUnfolderBase]: 4142/7039 cut-off events. [2024-06-27 19:22:52,720 INFO L125 PetriNetUnfolderBase]: For 1251263/1251267 co-relation queries the response was YES. [2024-06-27 19:22:52,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63931 conditions, 7039 events. 4142/7039 cut-off events. For 1251263/1251267 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 49666 event pairs, 1246 based on Foata normal form. 2/7036 useless extension candidates. Maximal degree in co-relation 63751. Up to 6259 conditions per place. [2024-06-27 19:22:52,813 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 418 selfloop transitions, 119 changer transitions 0/544 dead transitions. [2024-06-27 19:22:52,814 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 393 places, 544 transitions, 9391 flow [2024-06-27 19:22:52,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 19:22:52,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 19:22:52,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 256 transitions. [2024-06-27 19:22:52,814 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5333333333333333 [2024-06-27 19:22:52,815 INFO L175 Difference]: Start difference. First operand has 382 places, 525 transitions, 8273 flow. Second operand 12 states and 256 transitions. [2024-06-27 19:22:52,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 393 places, 544 transitions, 9391 flow [2024-06-27 19:22:57,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 385 places, 544 transitions, 9052 flow, removed 38 selfloop flow, removed 8 redundant places. [2024-06-27 19:22:57,654 INFO L231 Difference]: Finished difference. Result has 386 places, 525 transitions, 8178 flow [2024-06-27 19:22:57,655 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7934, PETRI_DIFFERENCE_MINUEND_PLACES=374, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=525, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=406, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=8178, PETRI_PLACES=386, PETRI_TRANSITIONS=525} [2024-06-27 19:22:57,655 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 345 predicate places. [2024-06-27 19:22:57,655 INFO L495 AbstractCegarLoop]: Abstraction has has 386 places, 525 transitions, 8178 flow [2024-06-27 19:22:57,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:22:57,655 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:22:57,655 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:22:57,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-27 19:22:57,656 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:22:57,656 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:22:57,656 INFO L85 PathProgramCache]: Analyzing trace with hash -1084908621, now seen corresponding path program 11 times [2024-06-27 19:22:57,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:22:57,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103144821] [2024-06-27 19:22:57,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:22:57,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:22:57,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:22:57,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:22:57,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:22:57,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103144821] [2024-06-27 19:22:57,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103144821] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:22:57,748 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:22:57,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:22:57,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642262906] [2024-06-27 19:22:57,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:22:57,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:22:57,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:22:57,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:22:57,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:22:57,788 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:22:57,788 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 386 places, 525 transitions, 8178 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:22:57,788 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:22:57,789 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:22:57,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:22:59,187 INFO L124 PetriNetUnfolderBase]: 4119/7008 cut-off events. [2024-06-27 19:22:59,187 INFO L125 PetriNetUnfolderBase]: For 1268277/1268284 co-relation queries the response was YES. [2024-06-27 19:22:59,252 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62794 conditions, 7008 events. 4119/7008 cut-off events. For 1268277/1268284 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 49542 event pairs, 1224 based on Foata normal form. 16/7021 useless extension candidates. Maximal degree in co-relation 62613. Up to 6152 conditions per place. [2024-06-27 19:22:59,278 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 414 selfloop transitions, 133 changer transitions 0/554 dead transitions. [2024-06-27 19:22:59,278 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 394 places, 554 transitions, 9368 flow [2024-06-27 19:22:59,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:22:59,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:22:59,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 211 transitions. [2024-06-27 19:22:59,279 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5861111111111111 [2024-06-27 19:22:59,279 INFO L175 Difference]: Start difference. First operand has 386 places, 525 transitions, 8178 flow. Second operand 9 states and 211 transitions. [2024-06-27 19:22:59,279 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 394 places, 554 transitions, 9368 flow [2024-06-27 19:23:03,911 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 383 places, 554 transitions, 9082 flow, removed 22 selfloop flow, removed 11 redundant places. [2024-06-27 19:23:03,917 INFO L231 Difference]: Finished difference. Result has 384 places, 525 transitions, 8171 flow [2024-06-27 19:23:03,918 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7892, PETRI_DIFFERENCE_MINUEND_PLACES=375, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=525, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=392, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8171, PETRI_PLACES=384, PETRI_TRANSITIONS=525} [2024-06-27 19:23:03,918 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 343 predicate places. [2024-06-27 19:23:03,918 INFO L495 AbstractCegarLoop]: Abstraction has has 384 places, 525 transitions, 8171 flow [2024-06-27 19:23:03,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:23:03,918 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:23:03,918 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:23:03,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-27 19:23:03,919 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:23:03,919 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:23:03,919 INFO L85 PathProgramCache]: Analyzing trace with hash -1076337741, now seen corresponding path program 12 times [2024-06-27 19:23:03,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:23:03,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395020196] [2024-06-27 19:23:03,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:23:03,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:23:03,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:23:04,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:23:04,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:23:04,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395020196] [2024-06-27 19:23:04,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395020196] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:23:04,009 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:23:04,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:23:04,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768737286] [2024-06-27 19:23:04,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:23:04,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:23:04,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:23:04,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:23:04,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:23:04,081 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:23:04,082 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 384 places, 525 transitions, 8171 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:23:04,082 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:23:04,082 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:23:04,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:23:05,633 INFO L124 PetriNetUnfolderBase]: 4096/6976 cut-off events. [2024-06-27 19:23:05,633 INFO L125 PetriNetUnfolderBase]: For 1237344/1237351 co-relation queries the response was YES. [2024-06-27 19:23:05,688 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61761 conditions, 6976 events. 4096/6976 cut-off events. For 1237344/1237351 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 49276 event pairs, 1073 based on Foata normal form. 16/6989 useless extension candidates. Maximal degree in co-relation 61579. Up to 5734 conditions per place. [2024-06-27 19:23:05,710 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 398 selfloop transitions, 154 changer transitions 0/559 dead transitions. [2024-06-27 19:23:05,711 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 392 places, 559 transitions, 9615 flow [2024-06-27 19:23:05,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:23:05,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:23:05,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 215 transitions. [2024-06-27 19:23:05,711 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5972222222222222 [2024-06-27 19:23:05,712 INFO L175 Difference]: Start difference. First operand has 384 places, 525 transitions, 8171 flow. Second operand 9 states and 215 transitions. [2024-06-27 19:23:05,712 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 392 places, 559 transitions, 9615 flow [2024-06-27 19:23:10,048 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 384 places, 559 transitions, 9291 flow, removed 26 selfloop flow, removed 8 redundant places. [2024-06-27 19:23:10,054 INFO L231 Difference]: Finished difference. Result has 385 places, 525 transitions, 8168 flow [2024-06-27 19:23:10,054 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7849, PETRI_DIFFERENCE_MINUEND_PLACES=376, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=525, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=154, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=371, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8168, PETRI_PLACES=385, PETRI_TRANSITIONS=525} [2024-06-27 19:23:10,055 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 344 predicate places. [2024-06-27 19:23:10,055 INFO L495 AbstractCegarLoop]: Abstraction has has 385 places, 525 transitions, 8168 flow [2024-06-27 19:23:10,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:23:10,055 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:23:10,055 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:23:10,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-27 19:23:10,055 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:23:10,055 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:23:10,056 INFO L85 PathProgramCache]: Analyzing trace with hash -913127763, now seen corresponding path program 3 times [2024-06-27 19:23:10,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:23:10,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599308003] [2024-06-27 19:23:10,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:23:10,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:23:10,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:23:10,148 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:23:10,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:23:10,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599308003] [2024-06-27 19:23:10,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599308003] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:23:10,148 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:23:10,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:23:10,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505713231] [2024-06-27 19:23:10,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:23:10,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:23:10,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:23:10,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:23:10,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:23:10,193 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:23:10,194 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 385 places, 525 transitions, 8168 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:23:10,194 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:23:10,194 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:23:10,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:23:11,585 INFO L124 PetriNetUnfolderBase]: 4132/7028 cut-off events. [2024-06-27 19:23:11,585 INFO L125 PetriNetUnfolderBase]: For 1240025/1240032 co-relation queries the response was YES. [2024-06-27 19:23:11,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62299 conditions, 7028 events. 4132/7028 cut-off events. For 1240025/1240032 co-relation queries the response was YES. Maximal size of possible extension queue 455. Compared 49617 event pairs, 1224 based on Foata normal form. 16/7041 useless extension candidates. Maximal degree in co-relation 62116. Up to 6193 conditions per place. [2024-06-27 19:23:11,675 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 416 selfloop transitions, 127 changer transitions 0/550 dead transitions. [2024-06-27 19:23:11,675 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 393 places, 550 transitions, 9384 flow [2024-06-27 19:23:11,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:23:11,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:23:11,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 204 transitions. [2024-06-27 19:23:11,676 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5666666666666667 [2024-06-27 19:23:11,676 INFO L175 Difference]: Start difference. First operand has 385 places, 525 transitions, 8168 flow. Second operand 9 states and 204 transitions. [2024-06-27 19:23:11,676 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 393 places, 550 transitions, 9384 flow [2024-06-27 19:23:16,482 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 384 places, 550 transitions, 8984 flow, removed 3 selfloop flow, removed 9 redundant places. [2024-06-27 19:23:16,489 INFO L231 Difference]: Finished difference. Result has 385 places, 527 transitions, 8086 flow [2024-06-27 19:23:16,489 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7768, PETRI_DIFFERENCE_MINUEND_PLACES=376, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=525, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=398, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8086, PETRI_PLACES=385, PETRI_TRANSITIONS=527} [2024-06-27 19:23:16,489 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 344 predicate places. [2024-06-27 19:23:16,489 INFO L495 AbstractCegarLoop]: Abstraction has has 385 places, 527 transitions, 8086 flow [2024-06-27 19:23:16,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:23:16,489 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:23:16,490 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:23:16,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-27 19:23:16,490 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:23:16,490 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:23:16,490 INFO L85 PathProgramCache]: Analyzing trace with hash -1868504883, now seen corresponding path program 4 times [2024-06-27 19:23:16,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:23:16,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558601249] [2024-06-27 19:23:16,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:23:16,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:23:16,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:23:16,579 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:23:16,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:23:16,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558601249] [2024-06-27 19:23:16,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558601249] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:23:16,579 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:23:16,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:23:16,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916881460] [2024-06-27 19:23:16,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:23:16,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:23:16,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:23:16,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:23:16,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:23:16,625 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:23:16,625 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 385 places, 527 transitions, 8086 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:23:16,625 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:23:16,626 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:23:16,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:23:18,043 INFO L124 PetriNetUnfolderBase]: 4214/7148 cut-off events. [2024-06-27 19:23:18,043 INFO L125 PetriNetUnfolderBase]: For 1284512/1284519 co-relation queries the response was YES. [2024-06-27 19:23:18,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63888 conditions, 7148 events. 4214/7148 cut-off events. For 1284512/1284519 co-relation queries the response was YES. Maximal size of possible extension queue 467. Compared 50486 event pairs, 1212 based on Foata normal form. 16/7161 useless extension candidates. Maximal degree in co-relation 63704. Up to 5919 conditions per place. [2024-06-27 19:23:18,137 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 412 selfloop transitions, 139 changer transitions 0/558 dead transitions. [2024-06-27 19:23:18,137 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 393 places, 558 transitions, 9594 flow [2024-06-27 19:23:18,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:23:18,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:23:18,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 208 transitions. [2024-06-27 19:23:18,139 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5777777777777777 [2024-06-27 19:23:18,139 INFO L175 Difference]: Start difference. First operand has 385 places, 527 transitions, 8086 flow. Second operand 9 states and 208 transitions. [2024-06-27 19:23:18,139 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 393 places, 558 transitions, 9594 flow [2024-06-27 19:23:22,918 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 386 places, 558 transitions, 9314 flow, removed 17 selfloop flow, removed 7 redundant places. [2024-06-27 19:23:22,924 INFO L231 Difference]: Finished difference. Result has 387 places, 530 transitions, 8178 flow [2024-06-27 19:23:22,925 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7806, PETRI_DIFFERENCE_MINUEND_PLACES=378, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=527, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=389, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8178, PETRI_PLACES=387, PETRI_TRANSITIONS=530} [2024-06-27 19:23:22,925 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 346 predicate places. [2024-06-27 19:23:22,925 INFO L495 AbstractCegarLoop]: Abstraction has has 387 places, 530 transitions, 8178 flow [2024-06-27 19:23:22,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:23:22,925 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:23:22,925 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:23:22,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-27 19:23:22,926 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:23:22,926 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:23:22,926 INFO L85 PathProgramCache]: Analyzing trace with hash -929169909, now seen corresponding path program 5 times [2024-06-27 19:23:22,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:23:22,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117739292] [2024-06-27 19:23:22,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:23:22,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:23:22,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:23:23,016 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:23:23,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:23:23,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117739292] [2024-06-27 19:23:23,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117739292] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:23:23,016 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:23:23,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:23:23,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278269463] [2024-06-27 19:23:23,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:23:23,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:23:23,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:23:23,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:23:23,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:23:23,068 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:23:23,068 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 387 places, 530 transitions, 8178 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:23:23,068 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:23:23,068 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:23:23,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:23:24,451 INFO L124 PetriNetUnfolderBase]: 4235/7186 cut-off events. [2024-06-27 19:23:24,451 INFO L125 PetriNetUnfolderBase]: For 1279076/1279086 co-relation queries the response was YES. [2024-06-27 19:23:24,526 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64814 conditions, 7186 events. 4235/7186 cut-off events. For 1279076/1279086 co-relation queries the response was YES. Maximal size of possible extension queue 472. Compared 50850 event pairs, 1271 based on Foata normal form. 10/7190 useless extension candidates. Maximal degree in co-relation 64629. Up to 6395 conditions per place. [2024-06-27 19:23:24,553 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 418 selfloop transitions, 127 changer transitions 0/552 dead transitions. [2024-06-27 19:23:24,554 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 394 places, 552 transitions, 9636 flow [2024-06-27 19:23:24,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:23:24,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:23:24,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 180 transitions. [2024-06-27 19:23:24,555 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5625 [2024-06-27 19:23:24,555 INFO L175 Difference]: Start difference. First operand has 387 places, 530 transitions, 8178 flow. Second operand 8 states and 180 transitions. [2024-06-27 19:23:24,555 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 394 places, 552 transitions, 9636 flow [2024-06-27 19:23:29,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 552 transitions, 9426 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-27 19:23:29,452 INFO L231 Difference]: Finished difference. Result has 390 places, 534 transitions, 8349 flow [2024-06-27 19:23:29,452 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7978, PETRI_DIFFERENCE_MINUEND_PLACES=382, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=530, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=405, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8349, PETRI_PLACES=390, PETRI_TRANSITIONS=534} [2024-06-27 19:23:29,452 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 349 predicate places. [2024-06-27 19:23:29,452 INFO L495 AbstractCegarLoop]: Abstraction has has 390 places, 534 transitions, 8349 flow [2024-06-27 19:23:29,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:23:29,452 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:23:29,453 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:23:29,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-27 19:23:29,453 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:23:29,453 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:23:29,453 INFO L85 PathProgramCache]: Analyzing trace with hash -1084904064, now seen corresponding path program 16 times [2024-06-27 19:23:29,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:23:29,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321083127] [2024-06-27 19:23:29,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:23:29,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:23:29,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:23:29,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:23:29,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:23:29,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321083127] [2024-06-27 19:23:29,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321083127] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:23:29,548 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:23:29,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:23:29,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503756080] [2024-06-27 19:23:29,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:23:29,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:23:29,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:23:29,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:23:29,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:23:29,614 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:23:29,614 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 390 places, 534 transitions, 8349 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:23:29,614 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:23:29,614 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:23:29,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:23:31,136 INFO L124 PetriNetUnfolderBase]: 4240/7195 cut-off events. [2024-06-27 19:23:31,136 INFO L125 PetriNetUnfolderBase]: For 1270526/1270530 co-relation queries the response was YES. [2024-06-27 19:23:31,197 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64911 conditions, 7195 events. 4240/7195 cut-off events. For 1270526/1270530 co-relation queries the response was YES. Maximal size of possible extension queue 475. Compared 50925 event pairs, 1267 based on Foata normal form. 2/7192 useless extension candidates. Maximal degree in co-relation 64724. Up to 6162 conditions per place. [2024-06-27 19:23:31,221 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 319 selfloop transitions, 236 changer transitions 0/562 dead transitions. [2024-06-27 19:23:31,222 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 399 places, 562 transitions, 10002 flow [2024-06-27 19:23:31,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:23:31,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:23:31,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 231 transitions. [2024-06-27 19:23:31,223 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5775 [2024-06-27 19:23:31,223 INFO L175 Difference]: Start difference. First operand has 390 places, 534 transitions, 8349 flow. Second operand 10 states and 231 transitions. [2024-06-27 19:23:31,223 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 399 places, 562 transitions, 10002 flow [2024-06-27 19:23:36,987 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 395 places, 562 transitions, 9786 flow, removed 33 selfloop flow, removed 4 redundant places. [2024-06-27 19:23:36,994 INFO L231 Difference]: Finished difference. Result has 396 places, 537 transitions, 8678 flow [2024-06-27 19:23:36,994 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8133, PETRI_DIFFERENCE_MINUEND_PLACES=386, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=534, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=233, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=301, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8678, PETRI_PLACES=396, PETRI_TRANSITIONS=537} [2024-06-27 19:23:36,995 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 355 predicate places. [2024-06-27 19:23:36,995 INFO L495 AbstractCegarLoop]: Abstraction has has 396 places, 537 transitions, 8678 flow [2024-06-27 19:23:36,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:23:36,995 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:23:36,995 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:23:36,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-27 19:23:36,995 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:23:36,995 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:23:36,996 INFO L85 PathProgramCache]: Analyzing trace with hash -913140504, now seen corresponding path program 17 times [2024-06-27 19:23:36,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:23:36,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774744832] [2024-06-27 19:23:36,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:23:36,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:23:36,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:23:37,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:23:37,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:23:37,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774744832] [2024-06-27 19:23:37,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774744832] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:23:37,093 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:23:37,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:23:37,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66834194] [2024-06-27 19:23:37,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:23:37,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:23:37,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:23:37,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:23:37,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:23:37,148 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:23:37,148 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 396 places, 537 transitions, 8678 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:23:37,148 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:23:37,148 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:23:37,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:23:38,607 INFO L124 PetriNetUnfolderBase]: 4253/7221 cut-off events. [2024-06-27 19:23:38,607 INFO L125 PetriNetUnfolderBase]: For 1299624/1299628 co-relation queries the response was YES. [2024-06-27 19:23:38,877 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65852 conditions, 7221 events. 4253/7221 cut-off events. For 1299624/1299628 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 51249 event pairs, 1269 based on Foata normal form. 2/7218 useless extension candidates. Maximal degree in co-relation 65663. Up to 6177 conditions per place. [2024-06-27 19:23:38,901 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 324 selfloop transitions, 237 changer transitions 0/568 dead transitions. [2024-06-27 19:23:38,901 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 407 places, 568 transitions, 10622 flow [2024-06-27 19:23:38,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 19:23:38,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 19:23:38,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 264 transitions. [2024-06-27 19:23:38,902 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.55 [2024-06-27 19:23:38,902 INFO L175 Difference]: Start difference. First operand has 396 places, 537 transitions, 8678 flow. Second operand 12 states and 264 transitions. [2024-06-27 19:23:38,902 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 407 places, 568 transitions, 10622 flow [2024-06-27 19:23:43,933 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 398 places, 568 transitions, 10010 flow, removed 35 selfloop flow, removed 9 redundant places. [2024-06-27 19:23:43,940 INFO L231 Difference]: Finished difference. Result has 399 places, 543 transitions, 8684 flow [2024-06-27 19:23:43,940 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8084, PETRI_DIFFERENCE_MINUEND_PLACES=387, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=537, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=231, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=306, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=8684, PETRI_PLACES=399, PETRI_TRANSITIONS=543} [2024-06-27 19:23:43,940 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 358 predicate places. [2024-06-27 19:23:43,940 INFO L495 AbstractCegarLoop]: Abstraction has has 399 places, 543 transitions, 8684 flow [2024-06-27 19:23:43,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:23:43,941 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:23:43,941 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:23:43,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-27 19:23:43,941 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:23:43,941 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:23:43,941 INFO L85 PathProgramCache]: Analyzing trace with hash -943454709, now seen corresponding path program 6 times [2024-06-27 19:23:43,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:23:43,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238291234] [2024-06-27 19:23:43,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:23:43,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:23:43,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:23:44,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:23:44,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:23:44,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238291234] [2024-06-27 19:23:44,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238291234] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:23:44,035 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:23:44,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:23:44,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187038638] [2024-06-27 19:23:44,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:23:44,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:23:44,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:23:44,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:23:44,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:23:44,079 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:23:44,080 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 399 places, 543 transitions, 8684 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:23:44,080 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:23:44,080 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:23:44,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:23:45,517 INFO L124 PetriNetUnfolderBase]: 4261/7235 cut-off events. [2024-06-27 19:23:45,517 INFO L125 PetriNetUnfolderBase]: For 1307172/1307182 co-relation queries the response was YES. [2024-06-27 19:23:45,589 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65835 conditions, 7235 events. 4261/7235 cut-off events. For 1307172/1307182 co-relation queries the response was YES. Maximal size of possible extension queue 481. Compared 51280 event pairs, 1277 based on Foata normal form. 10/7239 useless extension candidates. Maximal degree in co-relation 65646. Up to 6457 conditions per place. [2024-06-27 19:23:45,617 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 431 selfloop transitions, 123 changer transitions 0/561 dead transitions. [2024-06-27 19:23:45,617 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 406 places, 561 transitions, 9872 flow [2024-06-27 19:23:45,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:23:45,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:23:45,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 178 transitions. [2024-06-27 19:23:45,618 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.55625 [2024-06-27 19:23:45,618 INFO L175 Difference]: Start difference. First operand has 399 places, 543 transitions, 8684 flow. Second operand 8 states and 178 transitions. [2024-06-27 19:23:45,618 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 406 places, 561 transitions, 9872 flow [2024-06-27 19:23:51,596 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 397 places, 561 transitions, 9464 flow, removed 32 selfloop flow, removed 9 redundant places. [2024-06-27 19:23:51,603 INFO L231 Difference]: Finished difference. Result has 398 places, 545 transitions, 8573 flow [2024-06-27 19:23:51,603 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8276, PETRI_DIFFERENCE_MINUEND_PLACES=390, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=543, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=420, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8573, PETRI_PLACES=398, PETRI_TRANSITIONS=545} [2024-06-27 19:23:51,603 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 357 predicate places. [2024-06-27 19:23:51,604 INFO L495 AbstractCegarLoop]: Abstraction has has 398 places, 545 transitions, 8573 flow [2024-06-27 19:23:51,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:23:51,604 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:23:51,604 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:23:51,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-27 19:23:51,604 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:23:51,604 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:23:51,605 INFO L85 PathProgramCache]: Analyzing trace with hash -1084915224, now seen corresponding path program 18 times [2024-06-27 19:23:51,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:23:51,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597478605] [2024-06-27 19:23:51,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:23:51,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:23:51,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:23:51,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:23:51,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:23:51,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597478605] [2024-06-27 19:23:51,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597478605] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:23:51,699 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:23:51,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:23:51,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988790803] [2024-06-27 19:23:51,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:23:51,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:23:51,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:23:51,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:23:51,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:23:51,771 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:23:51,771 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 398 places, 545 transitions, 8573 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:23:51,772 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:23:51,772 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:23:51,772 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:23:53,270 INFO L124 PetriNetUnfolderBase]: 4258/7221 cut-off events. [2024-06-27 19:23:53,270 INFO L125 PetriNetUnfolderBase]: For 1293722/1293726 co-relation queries the response was YES. [2024-06-27 19:23:53,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65402 conditions, 7221 events. 4258/7221 cut-off events. For 1293722/1293726 co-relation queries the response was YES. Maximal size of possible extension queue 480. Compared 51146 event pairs, 1265 based on Foata normal form. 2/7218 useless extension candidates. Maximal degree in co-relation 65213. Up to 6186 conditions per place. [2024-06-27 19:23:53,376 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 322 selfloop transitions, 245 changer transitions 0/574 dead transitions. [2024-06-27 19:23:53,376 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 409 places, 574 transitions, 9989 flow [2024-06-27 19:23:53,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 19:23:53,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 19:23:53,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 269 transitions. [2024-06-27 19:23:53,377 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5604166666666667 [2024-06-27 19:23:53,377 INFO L175 Difference]: Start difference. First operand has 398 places, 545 transitions, 8573 flow. Second operand 12 states and 269 transitions. [2024-06-27 19:23:53,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 409 places, 574 transitions, 9989 flow [2024-06-27 19:23:58,930 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 403 places, 574 transitions, 9694 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-27 19:23:58,937 INFO L231 Difference]: Finished difference. Result has 404 places, 545 transitions, 8778 flow [2024-06-27 19:23:58,938 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8278, PETRI_DIFFERENCE_MINUEND_PLACES=392, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=545, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=245, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=300, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=8778, PETRI_PLACES=404, PETRI_TRANSITIONS=545} [2024-06-27 19:23:58,938 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 363 predicate places. [2024-06-27 19:23:58,938 INFO L495 AbstractCegarLoop]: Abstraction has has 404 places, 545 transitions, 8778 flow [2024-06-27 19:23:58,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:23:58,938 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:23:58,938 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:23:58,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-27 19:23:58,938 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:23:58,939 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:23:58,939 INFO L85 PathProgramCache]: Analyzing trace with hash -913134924, now seen corresponding path program 19 times [2024-06-27 19:23:58,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:23:58,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283081498] [2024-06-27 19:23:58,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:23:58,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:23:58,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:23:59,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:23:59,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:23:59,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283081498] [2024-06-27 19:23:59,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283081498] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:23:59,035 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:23:59,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:23:59,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141996037] [2024-06-27 19:23:59,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:23:59,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:23:59,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:23:59,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:23:59,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:23:59,083 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:23:59,083 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 404 places, 545 transitions, 8778 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:23:59,083 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:23:59,083 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:23:59,083 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:24:00,542 INFO L124 PetriNetUnfolderBase]: 4255/7225 cut-off events. [2024-06-27 19:24:00,542 INFO L125 PetriNetUnfolderBase]: For 1311594/1311598 co-relation queries the response was YES. [2024-06-27 19:24:00,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65750 conditions, 7225 events. 4255/7225 cut-off events. For 1311594/1311598 co-relation queries the response was YES. Maximal size of possible extension queue 481. Compared 51223 event pairs, 1269 based on Foata normal form. 2/7222 useless extension candidates. Maximal degree in co-relation 65560. Up to 6183 conditions per place. [2024-06-27 19:24:00,638 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 324 selfloop transitions, 235 changer transitions 0/566 dead transitions. [2024-06-27 19:24:00,639 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 413 places, 566 transitions, 10160 flow [2024-06-27 19:24:00,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:24:00,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:24:00,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 227 transitions. [2024-06-27 19:24:00,640 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5675 [2024-06-27 19:24:00,640 INFO L175 Difference]: Start difference. First operand has 404 places, 545 transitions, 8778 flow. Second operand 10 states and 227 transitions. [2024-06-27 19:24:00,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 413 places, 566 transitions, 10160 flow [2024-06-27 19:24:06,889 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 401 places, 566 transitions, 9632 flow, removed 13 selfloop flow, removed 12 redundant places. [2024-06-27 19:24:06,896 INFO L231 Difference]: Finished difference. Result has 402 places, 545 transitions, 8732 flow [2024-06-27 19:24:06,896 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8252, PETRI_DIFFERENCE_MINUEND_PLACES=392, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=545, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=235, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=310, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8732, PETRI_PLACES=402, PETRI_TRANSITIONS=545} [2024-06-27 19:24:06,896 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 361 predicate places. [2024-06-27 19:24:06,896 INFO L495 AbstractCegarLoop]: Abstraction has has 402 places, 545 transitions, 8732 flow [2024-06-27 19:24:06,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:24:06,896 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:24:06,897 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:24:06,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-27 19:24:06,897 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:24:06,897 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:24:06,897 INFO L85 PathProgramCache]: Analyzing trace with hash -484678491, now seen corresponding path program 7 times [2024-06-27 19:24:06,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:24:06,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195561979] [2024-06-27 19:24:06,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:24:06,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:24:06,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:24:06,987 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:24:06,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:24:06,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195561979] [2024-06-27 19:24:06,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195561979] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:24:06,987 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:24:06,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:24:06,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816422214] [2024-06-27 19:24:06,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:24:06,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:24:06,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:24:06,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:24:06,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:24:07,029 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:24:07,031 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 402 places, 545 transitions, 8732 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:24:07,031 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:24:07,031 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:24:07,031 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:24:08,770 INFO L124 PetriNetUnfolderBase]: 4263/7241 cut-off events. [2024-06-27 19:24:08,770 INFO L125 PetriNetUnfolderBase]: For 1319814/1319824 co-relation queries the response was YES. [2024-06-27 19:24:08,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65836 conditions, 7241 events. 4263/7241 cut-off events. For 1319814/1319824 co-relation queries the response was YES. Maximal size of possible extension queue 484. Compared 51449 event pairs, 1277 based on Foata normal form. 10/7245 useless extension candidates. Maximal degree in co-relation 65646. Up to 6362 conditions per place. [2024-06-27 19:24:08,931 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 430 selfloop transitions, 133 changer transitions 0/570 dead transitions. [2024-06-27 19:24:08,931 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 409 places, 570 transitions, 10242 flow [2024-06-27 19:24:08,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:24:08,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:24:08,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 184 transitions. [2024-06-27 19:24:08,932 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.575 [2024-06-27 19:24:08,932 INFO L175 Difference]: Start difference. First operand has 402 places, 545 transitions, 8732 flow. Second operand 8 states and 184 transitions. [2024-06-27 19:24:08,932 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 409 places, 570 transitions, 10242 flow [2024-06-27 19:24:14,124 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 399 places, 570 transitions, 9764 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-27 19:24:14,156 INFO L231 Difference]: Finished difference. Result has 401 places, 549 transitions, 8646 flow [2024-06-27 19:24:14,156 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8256, PETRI_DIFFERENCE_MINUEND_PLACES=392, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=545, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=413, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8646, PETRI_PLACES=401, PETRI_TRANSITIONS=549} [2024-06-27 19:24:14,156 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 360 predicate places. [2024-06-27 19:24:14,156 INFO L495 AbstractCegarLoop]: Abstraction has has 401 places, 549 transitions, 8646 flow [2024-06-27 19:24:14,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:24:14,157 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:24:14,157 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:24:14,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-27 19:24:14,157 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:24:14,157 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:24:14,157 INFO L85 PathProgramCache]: Analyzing trace with hash -493249371, now seen corresponding path program 8 times [2024-06-27 19:24:14,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:24:14,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861963346] [2024-06-27 19:24:14,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:24:14,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:24:14,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:24:14,282 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 19:24:14,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:24:14,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861963346] [2024-06-27 19:24:14,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861963346] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:24:14,282 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:24:14,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:24:14,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158617796] [2024-06-27 19:24:14,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:24:14,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:24:14,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:24:14,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:24:14,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:24:14,338 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:24:14,339 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 401 places, 549 transitions, 8646 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:24:14,339 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:24:14,339 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:24:14,339 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:24:16,099 INFO L124 PetriNetUnfolderBase]: 4258/7228 cut-off events. [2024-06-27 19:24:16,099 INFO L125 PetriNetUnfolderBase]: For 1309355/1309365 co-relation queries the response was YES. [2024-06-27 19:24:16,159 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65502 conditions, 7228 events. 4258/7228 cut-off events. For 1309355/1309365 co-relation queries the response was YES. Maximal size of possible extension queue 483. Compared 51369 event pairs, 1276 based on Foata normal form. 10/7232 useless extension candidates. Maximal degree in co-relation 65311. Up to 6454 conditions per place. [2024-06-27 19:24:16,182 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 434 selfloop transitions, 124 changer transitions 0/565 dead transitions. [2024-06-27 19:24:16,182 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 408 places, 565 transitions, 9800 flow [2024-06-27 19:24:16,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:24:16,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:24:16,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 179 transitions. [2024-06-27 19:24:16,183 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.559375 [2024-06-27 19:24:16,183 INFO L175 Difference]: Start difference. First operand has 401 places, 549 transitions, 8646 flow. Second operand 8 states and 179 transitions. [2024-06-27 19:24:16,183 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 408 places, 565 transitions, 9800 flow [2024-06-27 19:24:21,802 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 404 places, 565 transitions, 9544 flow, removed 52 selfloop flow, removed 4 redundant places. [2024-06-27 19:24:21,809 INFO L231 Difference]: Finished difference. Result has 405 places, 549 transitions, 8643 flow [2024-06-27 19:24:21,809 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8390, PETRI_DIFFERENCE_MINUEND_PLACES=397, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=549, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=425, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8643, PETRI_PLACES=405, PETRI_TRANSITIONS=549} [2024-06-27 19:24:21,810 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 364 predicate places. [2024-06-27 19:24:21,810 INFO L495 AbstractCegarLoop]: Abstraction has has 405 places, 549 transitions, 8643 flow [2024-06-27 19:24:21,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:24:21,810 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:24:21,810 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:24:21,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-27 19:24:21,810 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:24:21,811 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:24:21,811 INFO L85 PathProgramCache]: Analyzing trace with hash -1288053011, now seen corresponding path program 9 times [2024-06-27 19:24:21,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:24:21,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098102457] [2024-06-27 19:24:21,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:24:21,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:24:21,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:24:21,913 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:24:21,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:24:21,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098102457] [2024-06-27 19:24:21,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098102457] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:24:21,913 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:24:21,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:24:21,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053631179] [2024-06-27 19:24:21,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:24:21,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:24:21,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:24:21,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:24:21,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:24:21,978 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:24:21,978 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 405 places, 549 transitions, 8643 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:24:21,978 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:24:21,978 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:24:21,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:24:23,947 INFO L124 PetriNetUnfolderBase]: 4266/7240 cut-off events. [2024-06-27 19:24:23,947 INFO L125 PetriNetUnfolderBase]: For 1332137/1332147 co-relation queries the response was YES. [2024-06-27 19:24:24,013 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65924 conditions, 7240 events. 4266/7240 cut-off events. For 1332137/1332147 co-relation queries the response was YES. Maximal size of possible extension queue 486. Compared 51390 event pairs, 1210 based on Foata normal form. 10/7244 useless extension candidates. Maximal degree in co-relation 65731. Up to 5895 conditions per place. [2024-06-27 19:24:24,039 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 415 selfloop transitions, 156 changer transitions 0/578 dead transitions. [2024-06-27 19:24:24,039 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 412 places, 578 transitions, 10459 flow [2024-06-27 19:24:24,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:24:24,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:24:24,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 185 transitions. [2024-06-27 19:24:24,040 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.578125 [2024-06-27 19:24:24,040 INFO L175 Difference]: Start difference. First operand has 405 places, 549 transitions, 8643 flow. Second operand 8 states and 185 transitions. [2024-06-27 19:24:24,040 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 412 places, 578 transitions, 10459 flow [2024-06-27 19:24:29,533 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 405 places, 578 transitions, 10199 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-27 19:24:29,539 INFO L231 Difference]: Finished difference. Result has 407 places, 555 transitions, 8927 flow [2024-06-27 19:24:29,540 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8383, PETRI_DIFFERENCE_MINUEND_PLACES=398, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=549, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=152, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=396, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8927, PETRI_PLACES=407, PETRI_TRANSITIONS=555} [2024-06-27 19:24:29,540 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 366 predicate places. [2024-06-27 19:24:29,540 INFO L495 AbstractCegarLoop]: Abstraction has has 407 places, 555 transitions, 8927 flow [2024-06-27 19:24:29,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:24:29,540 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:24:29,541 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:24:29,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-27 19:24:29,541 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:24:29,541 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:24:29,541 INFO L85 PathProgramCache]: Analyzing trace with hash -83393721, now seen corresponding path program 10 times [2024-06-27 19:24:29,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:24:29,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86275632] [2024-06-27 19:24:29,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:24:29,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:24:29,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:24:29,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:24:29,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:24:29,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86275632] [2024-06-27 19:24:29,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86275632] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:24:29,632 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:24:29,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:24:29,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062136145] [2024-06-27 19:24:29,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:24:29,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:24:29,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:24:29,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:24:29,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:24:29,666 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:24:29,666 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 407 places, 555 transitions, 8927 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:24:29,666 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:24:29,666 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:24:29,666 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:24:31,545 INFO L124 PetriNetUnfolderBase]: 4261/7233 cut-off events. [2024-06-27 19:24:31,545 INFO L125 PetriNetUnfolderBase]: For 1346562/1346572 co-relation queries the response was YES. [2024-06-27 19:24:31,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66503 conditions, 7233 events. 4261/7233 cut-off events. For 1346562/1346572 co-relation queries the response was YES. Maximal size of possible extension queue 486. Compared 51316 event pairs, 1176 based on Foata normal form. 10/7237 useless extension candidates. Maximal degree in co-relation 66308. Up to 5891 conditions per place. [2024-06-27 19:24:31,629 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 415 selfloop transitions, 158 changer transitions 0/580 dead transitions. [2024-06-27 19:24:31,629 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 414 places, 580 transitions, 10399 flow [2024-06-27 19:24:31,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:24:31,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:24:31,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 187 transitions. [2024-06-27 19:24:31,630 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.584375 [2024-06-27 19:24:31,630 INFO L175 Difference]: Start difference. First operand has 407 places, 555 transitions, 8927 flow. Second operand 8 states and 187 transitions. [2024-06-27 19:24:31,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 414 places, 580 transitions, 10399 flow [2024-06-27 19:24:37,319 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 411 places, 580 transitions, 10137 flow, removed 59 selfloop flow, removed 3 redundant places. [2024-06-27 19:24:37,326 INFO L231 Difference]: Finished difference. Result has 412 places, 555 transitions, 8986 flow [2024-06-27 19:24:37,326 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8665, PETRI_DIFFERENCE_MINUEND_PLACES=404, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=555, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=158, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=397, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8986, PETRI_PLACES=412, PETRI_TRANSITIONS=555} [2024-06-27 19:24:37,326 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 371 predicate places. [2024-06-27 19:24:37,326 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 555 transitions, 8986 flow [2024-06-27 19:24:37,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:24:37,327 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:24:37,327 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:24:37,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-27 19:24:37,327 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:24:37,327 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:24:37,327 INFO L85 PathProgramCache]: Analyzing trace with hash 1794318484, now seen corresponding path program 20 times [2024-06-27 19:24:37,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:24:37,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881161626] [2024-06-27 19:24:37,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:24:37,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:24:37,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:24:37,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:24:37,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:24:37,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881161626] [2024-06-27 19:24:37,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881161626] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:24:37,407 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:24:37,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:24:37,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45050588] [2024-06-27 19:24:37,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:24:37,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:24:37,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:24:37,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:24:37,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:24:37,456 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:24:37,457 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 555 transitions, 8986 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:24:37,457 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:24:37,457 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:24:37,457 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:24:39,250 INFO L124 PetriNetUnfolderBase]: 4274/7256 cut-off events. [2024-06-27 19:24:39,250 INFO L125 PetriNetUnfolderBase]: For 1370228/1370235 co-relation queries the response was YES. [2024-06-27 19:24:39,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67310 conditions, 7256 events. 4274/7256 cut-off events. For 1370228/1370235 co-relation queries the response was YES. Maximal size of possible extension queue 491. Compared 51530 event pairs, 1300 based on Foata normal form. 4/7252 useless extension candidates. Maximal degree in co-relation 67113. Up to 6208 conditions per place. [2024-06-27 19:24:39,380 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 333 selfloop transitions, 239 changer transitions 0/579 dead transitions. [2024-06-27 19:24:39,380 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 420 places, 579 transitions, 10734 flow [2024-06-27 19:24:39,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:24:39,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:24:39,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 204 transitions. [2024-06-27 19:24:39,381 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5666666666666667 [2024-06-27 19:24:39,381 INFO L175 Difference]: Start difference. First operand has 412 places, 555 transitions, 8986 flow. Second operand 9 states and 204 transitions. [2024-06-27 19:24:39,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 420 places, 579 transitions, 10734 flow [2024-06-27 19:24:44,819 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 413 places, 579 transitions, 10304 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-27 19:24:44,827 INFO L231 Difference]: Finished difference. Result has 414 places, 561 transitions, 9162 flow [2024-06-27 19:24:44,827 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8556, PETRI_DIFFERENCE_MINUEND_PLACES=405, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=555, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=233, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=322, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9162, PETRI_PLACES=414, PETRI_TRANSITIONS=561} [2024-06-27 19:24:44,827 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 373 predicate places. [2024-06-27 19:24:44,828 INFO L495 AbstractCegarLoop]: Abstraction has has 414 places, 561 transitions, 9162 flow [2024-06-27 19:24:44,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:24:44,828 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:24:44,828 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:24:44,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-27 19:24:44,828 INFO L420 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:24:44,828 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:24:44,828 INFO L85 PathProgramCache]: Analyzing trace with hash -943467450, now seen corresponding path program 21 times [2024-06-27 19:24:44,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:24:44,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483348460] [2024-06-27 19:24:44,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:24:44,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:24:44,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:24:44,925 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:24:44,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:24:44,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483348460] [2024-06-27 19:24:44,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483348460] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:24:44,925 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:24:44,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:24:44,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774235663] [2024-06-27 19:24:44,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:24:44,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:24:44,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:24:44,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:24:44,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:24:44,978 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:24:44,979 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 414 places, 561 transitions, 9162 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:24:44,979 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:24:44,979 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:24:44,979 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:24:46,803 INFO L124 PetriNetUnfolderBase]: 4271/7252 cut-off events. [2024-06-27 19:24:46,804 INFO L125 PetriNetUnfolderBase]: For 1386906/1386913 co-relation queries the response was YES. [2024-06-27 19:24:46,873 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67000 conditions, 7252 events. 4271/7252 cut-off events. For 1386906/1386913 co-relation queries the response was YES. Maximal size of possible extension queue 491. Compared 51532 event pairs, 1300 based on Foata normal form. 4/7248 useless extension candidates. Maximal degree in co-relation 66803. Up to 6205 conditions per place. [2024-06-27 19:24:47,041 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 333 selfloop transitions, 240 changer transitions 0/580 dead transitions. [2024-06-27 19:24:47,041 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 424 places, 580 transitions, 10574 flow [2024-06-27 19:24:47,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 19:24:47,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 19:24:47,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 237 transitions. [2024-06-27 19:24:47,042 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5386363636363637 [2024-06-27 19:24:47,042 INFO L175 Difference]: Start difference. First operand has 414 places, 561 transitions, 9162 flow. Second operand 11 states and 237 transitions. [2024-06-27 19:24:47,042 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 424 places, 580 transitions, 10574 flow [2024-06-27 19:24:53,417 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 419 places, 580 transitions, 10138 flow, removed 44 selfloop flow, removed 5 redundant places. [2024-06-27 19:24:53,424 INFO L231 Difference]: Finished difference. Result has 420 places, 561 transitions, 9212 flow [2024-06-27 19:24:53,425 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8726, PETRI_DIFFERENCE_MINUEND_PLACES=409, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=561, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=240, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=321, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9212, PETRI_PLACES=420, PETRI_TRANSITIONS=561} [2024-06-27 19:24:53,425 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 379 predicate places. [2024-06-27 19:24:53,425 INFO L495 AbstractCegarLoop]: Abstraction has has 420 places, 561 transitions, 9212 flow [2024-06-27 19:24:53,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:24:53,425 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:24:53,425 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:24:53,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-27 19:24:53,426 INFO L420 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:24:53,426 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:24:53,426 INFO L85 PathProgramCache]: Analyzing trace with hash -1142913390, now seen corresponding path program 22 times [2024-06-27 19:24:53,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:24:53,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305506767] [2024-06-27 19:24:53,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:24:53,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:24:53,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:24:53,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:24:53,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:24:53,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305506767] [2024-06-27 19:24:53,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305506767] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:24:53,538 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:24:53,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:24:53,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857353774] [2024-06-27 19:24:53,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:24:53,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:24:53,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:24:53,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:24:53,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:24:53,594 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:24:53,595 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 420 places, 561 transitions, 9212 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:24:53,595 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:24:53,595 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:24:53,595 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:24:55,451 INFO L124 PetriNetUnfolderBase]: 4276/7258 cut-off events. [2024-06-27 19:24:55,452 INFO L125 PetriNetUnfolderBase]: For 1410040/1410044 co-relation queries the response was YES. [2024-06-27 19:24:55,527 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67284 conditions, 7258 events. 4276/7258 cut-off events. For 1410040/1410044 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 51527 event pairs, 1269 based on Foata normal form. 2/7255 useless extension candidates. Maximal degree in co-relation 67086. Up to 6650 conditions per place. [2024-06-27 19:24:55,557 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 535 selfloop transitions, 34 changer transitions 0/576 dead transitions. [2024-06-27 19:24:55,557 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 427 places, 576 transitions, 10448 flow [2024-06-27 19:24:55,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:24:55,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:24:55,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 170 transitions. [2024-06-27 19:24:55,558 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.53125 [2024-06-27 19:24:55,558 INFO L175 Difference]: Start difference. First operand has 420 places, 561 transitions, 9212 flow. Second operand 8 states and 170 transitions. [2024-06-27 19:24:55,558 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 427 places, 576 transitions, 10448 flow [2024-06-27 19:25:01,991 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 418 places, 576 transitions, 10075 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-27 19:25:01,998 INFO L231 Difference]: Finished difference. Result has 419 places, 564 transitions, 8989 flow [2024-06-27 19:25:01,998 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8842, PETRI_DIFFERENCE_MINUEND_PLACES=411, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=561, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=527, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8989, PETRI_PLACES=419, PETRI_TRANSITIONS=564} [2024-06-27 19:25:01,999 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 378 predicate places. [2024-06-27 19:25:01,999 INFO L495 AbstractCegarLoop]: Abstraction has has 419 places, 564 transitions, 8989 flow [2024-06-27 19:25:01,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:25:01,999 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:25:01,999 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:25:01,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-27 19:25:01,999 INFO L420 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:25:02,000 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:25:02,000 INFO L85 PathProgramCache]: Analyzing trace with hash -2139571694, now seen corresponding path program 23 times [2024-06-27 19:25:02,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:25:02,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306665829] [2024-06-27 19:25:02,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:25:02,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:25:02,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:25:02,094 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 19:25:02,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:25:02,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306665829] [2024-06-27 19:25:02,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306665829] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:25:02,095 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:25:02,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:25:02,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115297363] [2024-06-27 19:25:02,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:25:02,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:25:02,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:25:02,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:25:02,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:25:02,151 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:25:02,151 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 419 places, 564 transitions, 8989 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:25:02,151 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:25:02,151 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:25:02,151 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:25:03,863 INFO L124 PetriNetUnfolderBase]: 4281/7270 cut-off events. [2024-06-27 19:25:03,863 INFO L125 PetriNetUnfolderBase]: For 1435248/1435255 co-relation queries the response was YES. [2024-06-27 19:25:03,932 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67108 conditions, 7270 events. 4281/7270 cut-off events. For 1435248/1435255 co-relation queries the response was YES. Maximal size of possible extension queue 495. Compared 51657 event pairs, 1300 based on Foata normal form. 4/7266 useless extension candidates. Maximal degree in co-relation 66909. Up to 6217 conditions per place. [2024-06-27 19:25:03,959 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 334 selfloop transitions, 244 changer transitions 0/585 dead transitions. [2024-06-27 19:25:03,959 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 428 places, 585 transitions, 10486 flow [2024-06-27 19:25:03,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:25:03,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:25:03,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 223 transitions. [2024-06-27 19:25:03,960 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5575 [2024-06-27 19:25:03,960 INFO L175 Difference]: Start difference. First operand has 419 places, 564 transitions, 8989 flow. Second operand 10 states and 223 transitions. [2024-06-27 19:25:03,960 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 428 places, 585 transitions, 10486 flow [2024-06-27 19:25:09,495 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 422 places, 585 transitions, 10376 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-27 19:25:09,503 INFO L231 Difference]: Finished difference. Result has 423 places, 567 transitions, 9446 flow [2024-06-27 19:25:09,503 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8879, PETRI_DIFFERENCE_MINUEND_PLACES=413, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=564, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=241, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=323, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9446, PETRI_PLACES=423, PETRI_TRANSITIONS=567} [2024-06-27 19:25:09,504 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 382 predicate places. [2024-06-27 19:25:09,504 INFO L495 AbstractCegarLoop]: Abstraction has has 423 places, 567 transitions, 9446 flow [2024-06-27 19:25:09,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:25:09,504 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:25:09,504 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:25:09,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-27 19:25:09,504 INFO L420 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:25:09,505 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:25:09,505 INFO L85 PathProgramCache]: Analyzing trace with hash -2139577274, now seen corresponding path program 24 times [2024-06-27 19:25:09,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:25:09,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425740066] [2024-06-27 19:25:09,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:25:09,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:25:09,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:25:09,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:25:09,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:25:09,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425740066] [2024-06-27 19:25:09,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425740066] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:25:09,605 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:25:09,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:25:09,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535334799] [2024-06-27 19:25:09,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:25:09,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:25:09,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:25:09,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:25:09,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:25:09,671 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:25:09,671 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 423 places, 567 transitions, 9446 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:25:09,671 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:25:09,671 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:25:09,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:25:11,619 INFO L124 PetriNetUnfolderBase]: 4278/7270 cut-off events. [2024-06-27 19:25:11,620 INFO L125 PetriNetUnfolderBase]: For 1455383/1455390 co-relation queries the response was YES. [2024-06-27 19:25:11,685 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67693 conditions, 7270 events. 4278/7270 cut-off events. For 1455383/1455390 co-relation queries the response was YES. Maximal size of possible extension queue 495. Compared 51709 event pairs, 1302 based on Foata normal form. 4/7266 useless extension candidates. Maximal degree in co-relation 67493. Up to 6214 conditions per place. [2024-06-27 19:25:11,711 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 334 selfloop transitions, 245 changer transitions 0/586 dead transitions. [2024-06-27 19:25:11,711 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 434 places, 586 transitions, 10648 flow [2024-06-27 19:25:11,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 19:25:11,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 19:25:11,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 258 transitions. [2024-06-27 19:25:11,712 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5375 [2024-06-27 19:25:11,712 INFO L175 Difference]: Start difference. First operand has 423 places, 567 transitions, 9446 flow. Second operand 12 states and 258 transitions. [2024-06-27 19:25:11,712 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 434 places, 586 transitions, 10648 flow [2024-06-27 19:25:17,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 421 places, 586 transitions, 9395 flow, removed 47 selfloop flow, removed 13 redundant places. [2024-06-27 19:25:17,584 INFO L231 Difference]: Finished difference. Result has 422 places, 567 transitions, 8689 flow [2024-06-27 19:25:17,585 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8193, PETRI_DIFFERENCE_MINUEND_PLACES=410, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=567, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=245, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=322, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=8689, PETRI_PLACES=422, PETRI_TRANSITIONS=567} [2024-06-27 19:25:17,585 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 381 predicate places. [2024-06-27 19:25:17,585 INFO L495 AbstractCegarLoop]: Abstraction has has 422 places, 567 transitions, 8689 flow [2024-06-27 19:25:17,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:25:17,586 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:25:17,586 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:25:17,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-27 19:25:17,586 INFO L420 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:25:17,586 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:25:17,586 INFO L85 PathProgramCache]: Analyzing trace with hash -727524499, now seen corresponding path program 1 times [2024-06-27 19:25:17,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:25:17,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103600091] [2024-06-27 19:25:17,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:25:17,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:25:17,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:25:17,723 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:25:17,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:25:17,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103600091] [2024-06-27 19:25:17,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103600091] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:25:17,723 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:25:17,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:25:17,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238773784] [2024-06-27 19:25:17,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:25:17,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:25:17,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:25:17,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:25:17,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:25:17,797 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:25:17,797 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 422 places, 567 transitions, 8689 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:25:17,797 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:25:17,798 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:25:17,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:25:19,880 INFO L124 PetriNetUnfolderBase]: 4891/8312 cut-off events. [2024-06-27 19:25:19,880 INFO L125 PetriNetUnfolderBase]: For 2140297/2140301 co-relation queries the response was YES. [2024-06-27 19:25:19,957 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84551 conditions, 8312 events. 4891/8312 cut-off events. For 2140297/2140301 co-relation queries the response was YES. Maximal size of possible extension queue 539. Compared 60433 event pairs, 1119 based on Foata normal form. 7/8314 useless extension candidates. Maximal degree in co-relation 84352. Up to 4208 conditions per place. [2024-06-27 19:25:19,987 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 485 selfloop transitions, 142 changer transitions 0/634 dead transitions. [2024-06-27 19:25:19,987 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 430 places, 634 transitions, 11296 flow [2024-06-27 19:25:19,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:25:19,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:25:19,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 232 transitions. [2024-06-27 19:25:19,988 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6444444444444445 [2024-06-27 19:25:19,988 INFO L175 Difference]: Start difference. First operand has 422 places, 567 transitions, 8689 flow. Second operand 9 states and 232 transitions. [2024-06-27 19:25:19,988 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 430 places, 634 transitions, 11296 flow [2024-06-27 19:25:29,646 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 419 places, 634 transitions, 10784 flow, removed 5 selfloop flow, removed 11 redundant places. [2024-06-27 19:25:29,653 INFO L231 Difference]: Finished difference. Result has 423 places, 577 transitions, 8854 flow [2024-06-27 19:25:29,653 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8181, PETRI_DIFFERENCE_MINUEND_PLACES=411, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=567, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=426, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8854, PETRI_PLACES=423, PETRI_TRANSITIONS=577} [2024-06-27 19:25:29,659 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 382 predicate places. [2024-06-27 19:25:29,659 INFO L495 AbstractCegarLoop]: Abstraction has has 423 places, 577 transitions, 8854 flow [2024-06-27 19:25:29,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:25:29,659 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:25:29,659 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:25:29,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-27 19:25:29,660 INFO L420 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:25:29,660 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:25:29,660 INFO L85 PathProgramCache]: Analyzing trace with hash -727404343, now seen corresponding path program 1 times [2024-06-27 19:25:29,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:25:29,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87122911] [2024-06-27 19:25:29,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:25:29,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:25:29,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:25:29,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:25:29,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:25:29,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87122911] [2024-06-27 19:25:29,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87122911] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:25:29,755 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:25:29,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:25:29,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896375722] [2024-06-27 19:25:29,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:25:29,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:25:29,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:25:29,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:25:29,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:25:29,818 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:25:29,818 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 423 places, 577 transitions, 8854 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:25:29,818 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:25:29,818 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:25:29,818 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:25:31,953 INFO L124 PetriNetUnfolderBase]: 5096/8693 cut-off events. [2024-06-27 19:25:31,954 INFO L125 PetriNetUnfolderBase]: For 2452871/2452875 co-relation queries the response was YES. [2024-06-27 19:25:32,219 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90570 conditions, 8693 events. 5096/8693 cut-off events. For 2452871/2452875 co-relation queries the response was YES. Maximal size of possible extension queue 548. Compared 63901 event pairs, 1352 based on Foata normal form. 25/8713 useless extension candidates. Maximal degree in co-relation 90367. Up to 7469 conditions per place. [2024-06-27 19:25:32,248 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 559 selfloop transitions, 51 changer transitions 0/617 dead transitions. [2024-06-27 19:25:32,248 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 431 places, 617 transitions, 10548 flow [2024-06-27 19:25:32,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:25:32,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:25:32,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 208 transitions. [2024-06-27 19:25:32,249 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5777777777777777 [2024-06-27 19:25:32,249 INFO L175 Difference]: Start difference. First operand has 423 places, 577 transitions, 8854 flow. Second operand 9 states and 208 transitions. [2024-06-27 19:25:32,249 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 431 places, 617 transitions, 10548 flow [2024-06-27 19:25:41,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 427 places, 617 transitions, 10313 flow, removed 36 selfloop flow, removed 4 redundant places. [2024-06-27 19:25:41,348 INFO L231 Difference]: Finished difference. Result has 429 places, 581 transitions, 8841 flow [2024-06-27 19:25:41,349 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8633, PETRI_DIFFERENCE_MINUEND_PLACES=419, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=577, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=528, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8841, PETRI_PLACES=429, PETRI_TRANSITIONS=581} [2024-06-27 19:25:41,352 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 388 predicate places. [2024-06-27 19:25:41,352 INFO L495 AbstractCegarLoop]: Abstraction has has 429 places, 581 transitions, 8841 flow [2024-06-27 19:25:41,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:25:41,352 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:25:41,352 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:25:41,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-27 19:25:41,353 INFO L420 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:25:41,353 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:25:41,353 INFO L85 PathProgramCache]: Analyzing trace with hash -727404529, now seen corresponding path program 2 times [2024-06-27 19:25:41,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:25:41,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226717520] [2024-06-27 19:25:41,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:25:41,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:25:41,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:25:41,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:25:41,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:25:41,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226717520] [2024-06-27 19:25:41,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226717520] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:25:41,465 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:25:41,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:25:41,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972307251] [2024-06-27 19:25:41,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:25:41,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:25:41,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:25:41,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:25:41,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:25:41,528 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:25:41,528 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 429 places, 581 transitions, 8841 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:25:41,528 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:25:41,528 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:25:41,528 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:25:43,859 INFO L124 PetriNetUnfolderBase]: 5035/8584 cut-off events. [2024-06-27 19:25:43,859 INFO L125 PetriNetUnfolderBase]: For 2343653/2343657 co-relation queries the response was YES. [2024-06-27 19:25:43,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86865 conditions, 8584 events. 5035/8584 cut-off events. For 2343653/2343657 co-relation queries the response was YES. Maximal size of possible extension queue 548. Compared 63058 event pairs, 1336 based on Foata normal form. 25/8604 useless extension candidates. Maximal degree in co-relation 86660. Up to 7469 conditions per place. [2024-06-27 19:25:43,970 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 544 selfloop transitions, 46 changer transitions 19/616 dead transitions. [2024-06-27 19:25:43,971 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 616 transitions, 10191 flow [2024-06-27 19:25:43,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:25:43,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:25:43,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 207 transitions. [2024-06-27 19:25:43,971 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.575 [2024-06-27 19:25:43,972 INFO L175 Difference]: Start difference. First operand has 429 places, 581 transitions, 8841 flow. Second operand 9 states and 207 transitions. [2024-06-27 19:25:43,972 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 616 transitions, 10191 flow [2024-06-27 19:25:53,711 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 432 places, 616 transitions, 10019 flow, removed 39 selfloop flow, removed 5 redundant places. [2024-06-27 19:25:53,718 INFO L231 Difference]: Finished difference. Result has 433 places, 576 transitions, 8712 flow [2024-06-27 19:25:53,718 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8669, PETRI_DIFFERENCE_MINUEND_PLACES=424, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=581, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=535, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8712, PETRI_PLACES=433, PETRI_TRANSITIONS=576} [2024-06-27 19:25:53,721 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 392 predicate places. [2024-06-27 19:25:53,721 INFO L495 AbstractCegarLoop]: Abstraction has has 433 places, 576 transitions, 8712 flow [2024-06-27 19:25:53,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:25:53,721 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:25:53,722 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:25:53,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-27 19:25:53,722 INFO L420 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:25:53,722 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:25:53,722 INFO L85 PathProgramCache]: Analyzing trace with hash -550272823, now seen corresponding path program 2 times [2024-06-27 19:25:53,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:25:53,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202960782] [2024-06-27 19:25:53,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:25:53,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:25:53,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:25:53,894 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:25:53,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:25:53,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202960782] [2024-06-27 19:25:53,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202960782] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:25:53,895 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:25:53,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:25:53,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575000717] [2024-06-27 19:25:53,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:25:53,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:25:53,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:25:53,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:25:53,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:25:53,944 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:25:53,944 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 433 places, 576 transitions, 8712 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:25:53,944 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:25:53,945 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:25:53,945 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:25:56,435 INFO L124 PetriNetUnfolderBase]: 5125/8728 cut-off events. [2024-06-27 19:25:56,435 INFO L125 PetriNetUnfolderBase]: For 2591164/2591168 co-relation queries the response was YES. [2024-06-27 19:25:56,522 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91576 conditions, 8728 events. 5125/8728 cut-off events. For 2591164/2591168 co-relation queries the response was YES. Maximal size of possible extension queue 550. Compared 64088 event pairs, 1386 based on Foata normal form. 25/8748 useless extension candidates. Maximal degree in co-relation 91370. Up to 7188 conditions per place. [2024-06-27 19:25:56,555 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 562 selfloop transitions, 53 changer transitions 0/622 dead transitions. [2024-06-27 19:25:56,555 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 436 places, 622 transitions, 10721 flow [2024-06-27 19:25:56,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:25:56,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:25:56,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 230 transitions. [2024-06-27 19:25:56,556 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.575 [2024-06-27 19:25:56,556 INFO L175 Difference]: Start difference. First operand has 433 places, 576 transitions, 8712 flow. Second operand 10 states and 230 transitions. [2024-06-27 19:25:56,556 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 436 places, 622 transitions, 10721 flow [2024-06-27 19:26:07,440 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 428 places, 622 transitions, 10605 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-27 19:26:07,447 INFO L231 Difference]: Finished difference. Result has 429 places, 580 transitions, 8774 flow [2024-06-27 19:26:07,447 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8612, PETRI_DIFFERENCE_MINUEND_PLACES=419, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=576, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=526, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8774, PETRI_PLACES=429, PETRI_TRANSITIONS=580} [2024-06-27 19:26:07,448 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 388 predicate places. [2024-06-27 19:26:07,448 INFO L495 AbstractCegarLoop]: Abstraction has has 429 places, 580 transitions, 8774 flow [2024-06-27 19:26:07,448 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:26:07,448 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:26:07,448 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:26:07,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-27 19:26:07,448 INFO L420 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:26:07,449 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:26:07,449 INFO L85 PathProgramCache]: Analyzing trace with hash -68038273, now seen corresponding path program 3 times [2024-06-27 19:26:07,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:26:07,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725595467] [2024-06-27 19:26:07,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:26:07,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:26:07,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:26:07,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:26:07,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:26:07,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725595467] [2024-06-27 19:26:07,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725595467] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:26:07,556 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:26:07,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:26:07,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034881974] [2024-06-27 19:26:07,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:26:07,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:26:07,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:26:07,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:26:07,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:26:07,630 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:26:07,630 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 429 places, 580 transitions, 8774 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:26:07,630 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:26:07,630 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:26:07,630 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:26:10,034 INFO L124 PetriNetUnfolderBase]: 5079/8664 cut-off events. [2024-06-27 19:26:10,035 INFO L125 PetriNetUnfolderBase]: For 2389792/2389796 co-relation queries the response was YES. [2024-06-27 19:26:10,121 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88074 conditions, 8664 events. 5079/8664 cut-off events. For 2389792/2389796 co-relation queries the response was YES. Maximal size of possible extension queue 549. Compared 63657 event pairs, 1342 based on Foata normal form. 25/8684 useless extension candidates. Maximal degree in co-relation 87870. Up to 7188 conditions per place. [2024-06-27 19:26:10,153 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 556 selfloop transitions, 49 changer transitions 10/622 dead transitions. [2024-06-27 19:26:10,153 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 438 places, 622 transitions, 10722 flow [2024-06-27 19:26:10,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:26:10,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:26:10,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 229 transitions. [2024-06-27 19:26:10,154 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5725 [2024-06-27 19:26:10,154 INFO L175 Difference]: Start difference. First operand has 429 places, 580 transitions, 8774 flow. Second operand 10 states and 229 transitions. [2024-06-27 19:26:10,154 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 438 places, 622 transitions, 10722 flow [2024-06-27 19:26:21,303 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 434 places, 622 transitions, 10571 flow, removed 37 selfloop flow, removed 4 redundant places. [2024-06-27 19:26:21,311 INFO L231 Difference]: Finished difference. Result has 435 places, 575 transitions, 8661 flow [2024-06-27 19:26:21,311 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8623, PETRI_DIFFERENCE_MINUEND_PLACES=425, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=580, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=531, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8661, PETRI_PLACES=435, PETRI_TRANSITIONS=575} [2024-06-27 19:26:21,311 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 394 predicate places. [2024-06-27 19:26:21,312 INFO L495 AbstractCegarLoop]: Abstraction has has 435 places, 575 transitions, 8661 flow [2024-06-27 19:26:21,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:26:21,312 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:26:21,312 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:26:21,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-27 19:26:21,312 INFO L420 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:26:21,312 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:26:21,312 INFO L85 PathProgramCache]: Analyzing trace with hash -550035673, now seen corresponding path program 3 times [2024-06-27 19:26:21,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:26:21,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024698905] [2024-06-27 19:26:21,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:26:21,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:26:21,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:26:21,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:26:21,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:26:21,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024698905] [2024-06-27 19:26:21,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024698905] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:26:21,407 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:26:21,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:26:21,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377759931] [2024-06-27 19:26:21,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:26:21,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:26:21,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:26:21,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:26:21,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:26:21,468 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:26:21,468 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 435 places, 575 transitions, 8661 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:26:21,468 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:26:21,468 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:26:21,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:26:23,940 INFO L124 PetriNetUnfolderBase]: 5032/8583 cut-off events. [2024-06-27 19:26:23,940 INFO L125 PetriNetUnfolderBase]: For 2378195/2378199 co-relation queries the response was YES. [2024-06-27 19:26:24,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88986 conditions, 8583 events. 5032/8583 cut-off events. For 2378195/2378199 co-relation queries the response was YES. Maximal size of possible extension queue 544. Compared 62957 event pairs, 1300 based on Foata normal form. 7/8585 useless extension candidates. Maximal degree in co-relation 88781. Up to 7188 conditions per place. [2024-06-27 19:26:24,059 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 551 selfloop transitions, 47 changer transitions 8/613 dead transitions. [2024-06-27 19:26:24,060 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 440 places, 613 transitions, 10571 flow [2024-06-27 19:26:24,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:26:24,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:26:24,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 207 transitions. [2024-06-27 19:26:24,061 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.575 [2024-06-27 19:26:24,061 INFO L175 Difference]: Start difference. First operand has 435 places, 575 transitions, 8661 flow. Second operand 9 states and 207 transitions. [2024-06-27 19:26:24,061 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 440 places, 613 transitions, 10571 flow [2024-06-27 19:26:34,901 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 430 places, 613 transitions, 10415 flow, removed 15 selfloop flow, removed 10 redundant places. [2024-06-27 19:26:34,908 INFO L231 Difference]: Finished difference. Result has 433 places, 573 transitions, 8664 flow [2024-06-27 19:26:34,909 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8509, PETRI_DIFFERENCE_MINUEND_PLACES=422, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=575, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=528, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8664, PETRI_PLACES=433, PETRI_TRANSITIONS=573} [2024-06-27 19:26:34,909 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 392 predicate places. [2024-06-27 19:26:34,909 INFO L495 AbstractCegarLoop]: Abstraction has has 433 places, 573 transitions, 8664 flow [2024-06-27 19:26:34,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:26:34,909 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:26:34,909 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:26:34,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-06-27 19:26:34,909 INFO L420 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:26:34,910 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:26:34,910 INFO L85 PathProgramCache]: Analyzing trace with hash 763070971, now seen corresponding path program 4 times [2024-06-27 19:26:34,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:26:34,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193999716] [2024-06-27 19:26:34,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:26:34,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:26:34,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:26:35,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:26:35,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:26:35,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193999716] [2024-06-27 19:26:35,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193999716] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:26:35,085 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:26:35,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:26:35,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979871396] [2024-06-27 19:26:35,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:26:35,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:26:35,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:26:35,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:26:35,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:26:35,133 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:26:35,133 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 433 places, 573 transitions, 8664 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:26:35,133 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:26:35,133 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:26:35,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:26:37,601 INFO L124 PetriNetUnfolderBase]: 5103/8680 cut-off events. [2024-06-27 19:26:37,601 INFO L125 PetriNetUnfolderBase]: For 2596167/2596171 co-relation queries the response was YES. [2024-06-27 19:26:37,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93541 conditions, 8680 events. 5103/8680 cut-off events. For 2596167/2596171 co-relation queries the response was YES. Maximal size of possible extension queue 545. Compared 63765 event pairs, 1357 based on Foata normal form. 7/8682 useless extension candidates. Maximal degree in co-relation 93335. Up to 5094 conditions per place. [2024-06-27 19:26:37,727 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 479 selfloop transitions, 135 changer transitions 0/621 dead transitions. [2024-06-27 19:26:37,727 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 434 places, 621 transitions, 10837 flow [2024-06-27 19:26:37,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:26:37,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:26:37,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-06-27 19:26:37,728 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.63125 [2024-06-27 19:26:37,728 INFO L175 Difference]: Start difference. First operand has 433 places, 573 transitions, 8664 flow. Second operand 8 states and 202 transitions. [2024-06-27 19:26:37,728 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 434 places, 621 transitions, 10837 flow [2024-06-27 19:26:48,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 425 places, 621 transitions, 10690 flow, removed 24 selfloop flow, removed 9 redundant places. [2024-06-27 19:26:48,679 INFO L231 Difference]: Finished difference. Result has 428 places, 577 transitions, 9082 flow [2024-06-27 19:26:48,679 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8539, PETRI_DIFFERENCE_MINUEND_PLACES=418, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=573, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=439, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9082, PETRI_PLACES=428, PETRI_TRANSITIONS=577} [2024-06-27 19:26:48,680 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 387 predicate places. [2024-06-27 19:26:48,680 INFO L495 AbstractCegarLoop]: Abstraction has has 428 places, 577 transitions, 9082 flow [2024-06-27 19:26:48,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:26:48,680 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:26:48,680 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:26:48,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-06-27 19:26:48,681 INFO L420 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:26:48,681 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:26:48,681 INFO L85 PathProgramCache]: Analyzing trace with hash 685736851, now seen corresponding path program 5 times [2024-06-27 19:26:48,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:26:48,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678143004] [2024-06-27 19:26:48,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:26:48,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:26:48,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:26:48,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:26:48,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:26:48,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678143004] [2024-06-27 19:26:48,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678143004] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:26:48,789 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:26:48,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:26:48,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55115700] [2024-06-27 19:26:48,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:26:48,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:26:48,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:26:48,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:26:48,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:26:48,865 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:26:48,866 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 428 places, 577 transitions, 9082 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:26:48,866 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:26:48,866 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:26:48,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:26:51,301 INFO L124 PetriNetUnfolderBase]: 5131/8720 cut-off events. [2024-06-27 19:26:51,301 INFO L125 PetriNetUnfolderBase]: For 2531942/2531946 co-relation queries the response was YES. [2024-06-27 19:26:51,395 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94336 conditions, 8720 events. 5131/8720 cut-off events. For 2531942/2531946 co-relation queries the response was YES. Maximal size of possible extension queue 549. Compared 64086 event pairs, 1597 based on Foata normal form. 9/8716 useless extension candidates. Maximal degree in co-relation 94131. Up to 7238 conditions per place. [2024-06-27 19:26:51,429 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 469 selfloop transitions, 140 changer transitions 0/616 dead transitions. [2024-06-27 19:26:51,429 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 435 places, 616 transitions, 10861 flow [2024-06-27 19:26:51,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:26:51,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:26:51,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 200 transitions. [2024-06-27 19:26:51,430 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-27 19:26:51,430 INFO L175 Difference]: Start difference. First operand has 428 places, 577 transitions, 9082 flow. Second operand 8 states and 200 transitions. [2024-06-27 19:26:51,430 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 435 places, 616 transitions, 10861 flow [2024-06-27 19:27:00,998 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 430 places, 616 transitions, 10543 flow, removed 31 selfloop flow, removed 5 redundant places. [2024-06-27 19:27:01,005 INFO L231 Difference]: Finished difference. Result has 432 places, 582 transitions, 9254 flow [2024-06-27 19:27:01,006 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8764, PETRI_DIFFERENCE_MINUEND_PLACES=423, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=577, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=438, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9254, PETRI_PLACES=432, PETRI_TRANSITIONS=582} [2024-06-27 19:27:01,006 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 391 predicate places. [2024-06-27 19:27:01,006 INFO L495 AbstractCegarLoop]: Abstraction has has 432 places, 582 transitions, 9254 flow [2024-06-27 19:27:01,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:27:01,006 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:27:01,006 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:27:01,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2024-06-27 19:27:01,006 INFO L420 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:27:01,007 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:27:01,007 INFO L85 PathProgramCache]: Analyzing trace with hash 694307731, now seen corresponding path program 6 times [2024-06-27 19:27:01,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:27:01,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949964012] [2024-06-27 19:27:01,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:27:01,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:27:01,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:27:01,101 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:27:01,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:27:01,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949964012] [2024-06-27 19:27:01,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949964012] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:27:01,102 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:27:01,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:27:01,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360081733] [2024-06-27 19:27:01,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:27:01,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:27:01,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:27:01,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:27:01,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:27:01,161 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:27:01,161 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 432 places, 582 transitions, 9254 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:27:01,161 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:27:01,161 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:27:01,162 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:27:03,582 INFO L124 PetriNetUnfolderBase]: 5113/8698 cut-off events. [2024-06-27 19:27:03,582 INFO L125 PetriNetUnfolderBase]: For 2517483/2517487 co-relation queries the response was YES. [2024-06-27 19:27:03,673 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93177 conditions, 8698 events. 5113/8698 cut-off events. For 2517483/2517487 co-relation queries the response was YES. Maximal size of possible extension queue 549. Compared 63911 event pairs, 1810 based on Foata normal form. 9/8700 useless extension candidates. Maximal degree in co-relation 92970. Up to 7799 conditions per place. [2024-06-27 19:27:03,706 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 476 selfloop transitions, 123 changer transitions 0/606 dead transitions. [2024-06-27 19:27:03,706 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 439 places, 606 transitions, 10566 flow [2024-06-27 19:27:03,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:27:03,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:27:03,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-27 19:27:03,707 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.596875 [2024-06-27 19:27:03,707 INFO L175 Difference]: Start difference. First operand has 432 places, 582 transitions, 9254 flow. Second operand 8 states and 191 transitions. [2024-06-27 19:27:03,707 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 439 places, 606 transitions, 10566 flow [2024-06-27 19:27:13,404 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 435 places, 606 transitions, 10369 flow, removed 24 selfloop flow, removed 4 redundant places. [2024-06-27 19:27:13,411 INFO L231 Difference]: Finished difference. Result has 436 places, 582 transitions, 9314 flow [2024-06-27 19:27:13,412 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9057, PETRI_DIFFERENCE_MINUEND_PLACES=428, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=582, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=459, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9314, PETRI_PLACES=436, PETRI_TRANSITIONS=582} [2024-06-27 19:27:13,412 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 395 predicate places. [2024-06-27 19:27:13,412 INFO L495 AbstractCegarLoop]: Abstraction has has 436 places, 582 transitions, 9314 flow [2024-06-27 19:27:13,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:27:13,412 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:27:13,413 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:27:13,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2024-06-27 19:27:13,413 INFO L420 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:27:13,413 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:27:13,413 INFO L85 PathProgramCache]: Analyzing trace with hash 763190941, now seen corresponding path program 7 times [2024-06-27 19:27:13,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:27:13,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302740801] [2024-06-27 19:27:13,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:27:13,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:27:13,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:27:13,535 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 19:27:13,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:27:13,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302740801] [2024-06-27 19:27:13,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302740801] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:27:13,536 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:27:13,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:27:13,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041892237] [2024-06-27 19:27:13,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:27:13,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:27:13,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:27:13,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:27:13,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:27:13,599 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:27:13,599 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 436 places, 582 transitions, 9314 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:27:13,599 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:27:13,599 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:27:13,599 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:27:16,140 INFO L124 PetriNetUnfolderBase]: 5082/8662 cut-off events. [2024-06-27 19:27:16,141 INFO L125 PetriNetUnfolderBase]: For 2501299/2501303 co-relation queries the response was YES. [2024-06-27 19:27:16,233 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90369 conditions, 8662 events. 5082/8662 cut-off events. For 2501299/2501303 co-relation queries the response was YES. Maximal size of possible extension queue 550. Compared 63845 event pairs, 1631 based on Foata normal form. 25/8671 useless extension candidates. Maximal degree in co-relation 90160. Up to 7542 conditions per place. [2024-06-27 19:27:16,265 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 562 selfloop transitions, 44 changer transitions 0/613 dead transitions. [2024-06-27 19:27:16,265 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 443 places, 613 transitions, 10884 flow [2024-06-27 19:27:16,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:27:16,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:27:16,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 185 transitions. [2024-06-27 19:27:16,266 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.578125 [2024-06-27 19:27:16,266 INFO L175 Difference]: Start difference. First operand has 436 places, 582 transitions, 9314 flow. Second operand 8 states and 185 transitions. [2024-06-27 19:27:16,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 443 places, 613 transitions, 10884 flow [2024-06-27 19:27:26,127 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 437 places, 613 transitions, 10577 flow, removed 35 selfloop flow, removed 6 redundant places. [2024-06-27 19:27:26,134 INFO L231 Difference]: Finished difference. Result has 438 places, 582 transitions, 9100 flow [2024-06-27 19:27:26,134 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9007, PETRI_DIFFERENCE_MINUEND_PLACES=430, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=582, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=538, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9100, PETRI_PLACES=438, PETRI_TRANSITIONS=582} [2024-06-27 19:27:26,134 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 397 predicate places. [2024-06-27 19:27:26,134 INFO L495 AbstractCegarLoop]: Abstraction has has 438 places, 582 transitions, 9100 flow [2024-06-27 19:27:26,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:27:26,135 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:27:26,135 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:27:26,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2024-06-27 19:27:26,135 INFO L420 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:27:26,135 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:27:26,135 INFO L85 PathProgramCache]: Analyzing trace with hash -1032820167, now seen corresponding path program 4 times [2024-06-27 19:27:26,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:27:26,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799064373] [2024-06-27 19:27:26,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:27:26,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:27:26,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:27:26,236 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:27:26,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:27:26,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799064373] [2024-06-27 19:27:26,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799064373] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:27:26,236 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:27:26,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:27:26,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787192601] [2024-06-27 19:27:26,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:27:26,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:27:26,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:27:26,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:27:26,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:27:26,273 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:27:26,273 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 438 places, 582 transitions, 9100 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:27:26,273 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:27:26,273 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:27:26,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:27:28,709 INFO L124 PetriNetUnfolderBase]: 5021/8553 cut-off events. [2024-06-27 19:27:28,710 INFO L125 PetriNetUnfolderBase]: For 2384417/2384421 co-relation queries the response was YES. [2024-06-27 19:27:28,798 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86749 conditions, 8553 events. 5021/8553 cut-off events. For 2384417/2384421 co-relation queries the response was YES. Maximal size of possible extension queue 550. Compared 62888 event pairs, 1615 based on Foata normal form. 25/8562 useless extension candidates. Maximal degree in co-relation 86539. Up to 7542 conditions per place. [2024-06-27 19:27:28,830 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 547 selfloop transitions, 39 changer transitions 19/612 dead transitions. [2024-06-27 19:27:28,831 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 445 places, 612 transitions, 10430 flow [2024-06-27 19:27:28,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:27:28,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:27:28,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 184 transitions. [2024-06-27 19:27:28,831 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.575 [2024-06-27 19:27:28,832 INFO L175 Difference]: Start difference. First operand has 438 places, 582 transitions, 9100 flow. Second operand 8 states and 184 transitions. [2024-06-27 19:27:28,832 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 445 places, 612 transitions, 10430 flow [2024-06-27 19:27:37,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 437 places, 612 transitions, 10313 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-06-27 19:27:37,673 INFO L231 Difference]: Finished difference. Result has 438 places, 577 transitions, 9006 flow [2024-06-27 19:27:37,673 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8983, PETRI_DIFFERENCE_MINUEND_PLACES=430, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=582, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=543, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9006, PETRI_PLACES=438, PETRI_TRANSITIONS=577} [2024-06-27 19:27:37,673 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 397 predicate places. [2024-06-27 19:27:37,674 INFO L495 AbstractCegarLoop]: Abstraction has has 438 places, 577 transitions, 9006 flow [2024-06-27 19:27:37,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:27:37,674 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:27:37,674 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:27:37,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2024-06-27 19:27:37,674 INFO L420 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:27:37,674 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:27:37,674 INFO L85 PathProgramCache]: Analyzing trace with hash 809451031, now seen corresponding path program 8 times [2024-06-27 19:27:37,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:27:37,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879324172] [2024-06-27 19:27:37,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:27:37,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:27:37,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:27:37,787 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:27:37,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:27:37,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879324172] [2024-06-27 19:27:37,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879324172] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:27:37,788 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:27:37,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:27:37,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582438388] [2024-06-27 19:27:37,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:27:37,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:27:37,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:27:37,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:27:37,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:27:37,855 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:27:37,855 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 438 places, 577 transitions, 9006 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:27:37,855 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:27:37,855 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:27:37,856 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:27:40,145 INFO L124 PetriNetUnfolderBase]: 4963/8446 cut-off events. [2024-06-27 19:27:40,145 INFO L125 PetriNetUnfolderBase]: For 2436670/2436674 co-relation queries the response was YES. [2024-06-27 19:27:40,231 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85992 conditions, 8446 events. 4963/8446 cut-off events. For 2436670/2436674 co-relation queries the response was YES. Maximal size of possible extension queue 545. Compared 61696 event pairs, 1542 based on Foata normal form. 31/8472 useless extension candidates. Maximal degree in co-relation 85781. Up to 6606 conditions per place. [2024-06-27 19:27:40,263 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 520 selfloop transitions, 79 changer transitions 0/606 dead transitions. [2024-06-27 19:27:40,263 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 439 places, 606 transitions, 10593 flow [2024-06-27 19:27:40,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:27:40,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:27:40,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-27 19:27:40,264 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.60625 [2024-06-27 19:27:40,264 INFO L175 Difference]: Start difference. First operand has 438 places, 577 transitions, 9006 flow. Second operand 8 states and 194 transitions. [2024-06-27 19:27:40,264 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 439 places, 606 transitions, 10593 flow [2024-06-27 19:27:49,030 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 431 places, 606 transitions, 10473 flow, removed 20 selfloop flow, removed 8 redundant places. [2024-06-27 19:27:49,037 INFO L231 Difference]: Finished difference. Result has 432 places, 577 transitions, 9060 flow [2024-06-27 19:27:49,037 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8892, PETRI_DIFFERENCE_MINUEND_PLACES=424, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=577, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=498, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9060, PETRI_PLACES=432, PETRI_TRANSITIONS=577} [2024-06-27 19:27:49,037 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 391 predicate places. [2024-06-27 19:27:49,037 INFO L495 AbstractCegarLoop]: Abstraction has has 432 places, 577 transitions, 9060 flow [2024-06-27 19:27:49,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:27:49,041 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:27:49,041 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:27:49,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2024-06-27 19:27:49,041 INFO L420 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:27:49,041 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:27:49,041 INFO L85 PathProgramCache]: Analyzing trace with hash -727111449, now seen corresponding path program 9 times [2024-06-27 19:27:49,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:27:49,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630998461] [2024-06-27 19:27:49,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:27:49,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:27:49,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:27:49,200 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:27:49,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:27:49,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630998461] [2024-06-27 19:27:49,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630998461] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:27:49,201 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:27:49,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:27:49,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440706827] [2024-06-27 19:27:49,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:27:49,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:27:49,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:27:49,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:27:49,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:27:49,246 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:27:49,246 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 432 places, 577 transitions, 9060 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:27:49,247 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:27:49,247 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:27:49,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:27:51,427 INFO L124 PetriNetUnfolderBase]: 4894/8341 cut-off events. [2024-06-27 19:27:51,427 INFO L125 PetriNetUnfolderBase]: For 2189791/2189795 co-relation queries the response was YES. [2024-06-27 19:27:51,515 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81205 conditions, 8341 events. 4894/8341 cut-off events. For 2189791/2189795 co-relation queries the response was YES. Maximal size of possible extension queue 545. Compared 61178 event pairs, 1599 based on Foata normal form. 35/8363 useless extension candidates. Maximal degree in co-relation 80997. Up to 7373 conditions per place. [2024-06-27 19:27:51,711 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 516 selfloop transitions, 73 changer transitions 2/598 dead transitions. [2024-06-27 19:27:51,711 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 439 places, 598 transitions, 10330 flow [2024-06-27 19:27:51,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:27:51,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:27:51,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 188 transitions. [2024-06-27 19:27:51,712 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5875 [2024-06-27 19:27:51,712 INFO L175 Difference]: Start difference. First operand has 432 places, 577 transitions, 9060 flow. Second operand 8 states and 188 transitions. [2024-06-27 19:27:51,712 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 439 places, 598 transitions, 10330 flow [2024-06-27 19:27:59,396 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 433 places, 598 transitions, 10180 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-27 19:27:59,403 INFO L231 Difference]: Finished difference. Result has 434 places, 575 transitions, 9032 flow [2024-06-27 19:27:59,404 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8910, PETRI_DIFFERENCE_MINUEND_PLACES=426, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=577, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=504, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9032, PETRI_PLACES=434, PETRI_TRANSITIONS=575} [2024-06-27 19:27:59,404 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 393 predicate places. [2024-06-27 19:27:59,404 INFO L495 AbstractCegarLoop]: Abstraction has has 434 places, 575 transitions, 9032 flow [2024-06-27 19:27:59,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:27:59,404 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:27:59,404 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:27:59,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2024-06-27 19:27:59,405 INFO L420 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:27:59,405 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:27:59,405 INFO L85 PathProgramCache]: Analyzing trace with hash -766796457, now seen corresponding path program 5 times [2024-06-27 19:27:59,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:27:59,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498179195] [2024-06-27 19:27:59,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:27:59,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:27:59,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:27:59,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:27:59,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:27:59,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498179195] [2024-06-27 19:27:59,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498179195] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:27:59,519 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:27:59,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:27:59,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644294879] [2024-06-27 19:27:59,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:27:59,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:27:59,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:27:59,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:27:59,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:27:59,580 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:27:59,580 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 434 places, 575 transitions, 9032 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:27:59,580 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:27:59,580 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:27:59,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:28:01,825 INFO L124 PetriNetUnfolderBase]: 4882/8333 cut-off events. [2024-06-27 19:28:01,826 INFO L125 PetriNetUnfolderBase]: For 2158399/2158403 co-relation queries the response was YES. [2024-06-27 19:28:01,911 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80389 conditions, 8333 events. 4882/8333 cut-off events. For 2158399/2158403 co-relation queries the response was YES. Maximal size of possible extension queue 545. Compared 61079 event pairs, 1606 based on Foata normal form. 35/8363 useless extension candidates. Maximal degree in co-relation 80181. Up to 7296 conditions per place. [2024-06-27 19:28:01,942 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 516 selfloop transitions, 66 changer transitions 8/597 dead transitions. [2024-06-27 19:28:01,942 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 441 places, 597 transitions, 10329 flow [2024-06-27 19:28:01,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:28:01,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:28:01,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 188 transitions. [2024-06-27 19:28:01,943 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5875 [2024-06-27 19:28:01,943 INFO L175 Difference]: Start difference. First operand has 434 places, 575 transitions, 9032 flow. Second operand 8 states and 188 transitions. [2024-06-27 19:28:01,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 441 places, 597 transitions, 10329 flow [2024-06-27 19:28:09,626 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 434 places, 597 transitions, 10138 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-27 19:28:09,633 INFO L231 Difference]: Finished difference. Result has 435 places, 570 transitions, 8903 flow [2024-06-27 19:28:09,634 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8841, PETRI_DIFFERENCE_MINUEND_PLACES=427, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=575, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=509, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8903, PETRI_PLACES=435, PETRI_TRANSITIONS=570} [2024-06-27 19:28:09,634 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 394 predicate places. [2024-06-27 19:28:09,634 INFO L495 AbstractCegarLoop]: Abstraction has has 435 places, 570 transitions, 8903 flow [2024-06-27 19:28:09,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:28:09,634 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:28:09,634 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:28:09,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2024-06-27 19:28:09,635 INFO L420 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:28:09,635 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:28:09,635 INFO L85 PathProgramCache]: Analyzing trace with hash 809451217, now seen corresponding path program 6 times [2024-06-27 19:28:09,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:28:09,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653729287] [2024-06-27 19:28:09,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:28:09,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:28:09,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:28:09,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:28:09,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:28:09,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653729287] [2024-06-27 19:28:09,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653729287] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:28:09,760 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:28:09,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:28:09,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838049949] [2024-06-27 19:28:09,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:28:09,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:28:09,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:28:09,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:28:09,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:28:09,817 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:28:09,817 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 435 places, 570 transitions, 8903 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:28:09,817 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:28:09,817 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:28:09,817 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:28:12,043 INFO L124 PetriNetUnfolderBase]: 4672/7977 cut-off events. [2024-06-27 19:28:12,043 INFO L125 PetriNetUnfolderBase]: For 1948120/1948124 co-relation queries the response was YES. [2024-06-27 19:28:12,129 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75217 conditions, 7977 events. 4672/7977 cut-off events. For 1948120/1948124 co-relation queries the response was YES. Maximal size of possible extension queue 532. Compared 57903 event pairs, 1408 based on Foata normal form. 31/8003 useless extension candidates. Maximal degree in co-relation 75008. Up to 6606 conditions per place. [2024-06-27 19:28:12,157 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 509 selfloop transitions, 67 changer transitions 15/598 dead transitions. [2024-06-27 19:28:12,157 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 442 places, 598 transitions, 10230 flow [2024-06-27 19:28:12,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:28:12,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:28:12,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 193 transitions. [2024-06-27 19:28:12,158 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.603125 [2024-06-27 19:28:12,158 INFO L175 Difference]: Start difference. First operand has 435 places, 570 transitions, 8903 flow. Second operand 8 states and 193 transitions. [2024-06-27 19:28:12,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 442 places, 598 transitions, 10230 flow [2024-06-27 19:28:20,532 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 434 places, 598 transitions, 10067 flow, removed 10 selfloop flow, removed 8 redundant places. [2024-06-27 19:28:20,539 INFO L231 Difference]: Finished difference. Result has 436 places, 561 transitions, 8742 flow [2024-06-27 19:28:20,539 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8740, PETRI_DIFFERENCE_MINUEND_PLACES=427, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=570, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=503, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8742, PETRI_PLACES=436, PETRI_TRANSITIONS=561} [2024-06-27 19:28:20,540 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 395 predicate places. [2024-06-27 19:28:20,540 INFO L495 AbstractCegarLoop]: Abstraction has has 436 places, 561 transitions, 8742 flow [2024-06-27 19:28:20,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:28:20,540 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:28:20,540 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:28:20,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2024-06-27 19:28:20,540 INFO L420 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:28:20,541 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:28:20,541 INFO L85 PathProgramCache]: Analyzing trace with hash -735220137, now seen corresponding path program 7 times [2024-06-27 19:28:20,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:28:20,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091947157] [2024-06-27 19:28:20,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:28:20,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:28:20,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:28:20,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:28:20,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:28:20,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091947157] [2024-06-27 19:28:20,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091947157] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:28:20,646 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:28:20,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:28:20,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207710914] [2024-06-27 19:28:20,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:28:20,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:28:20,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:28:20,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:28:20,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:28:20,695 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:28:20,695 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 436 places, 561 transitions, 8742 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:28:20,695 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:28:20,695 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:28:20,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:28:22,956 INFO L124 PetriNetUnfolderBase]: 4759/8150 cut-off events. [2024-06-27 19:28:22,957 INFO L125 PetriNetUnfolderBase]: For 1891096/1891100 co-relation queries the response was YES. [2024-06-27 19:28:23,040 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75936 conditions, 8150 events. 4759/8150 cut-off events. For 1891096/1891100 co-relation queries the response was YES. Maximal size of possible extension queue 533. Compared 59640 event pairs, 1099 based on Foata normal form. 25/8170 useless extension candidates. Maximal degree in co-relation 75726. Up to 5197 conditions per place. [2024-06-27 19:28:23,070 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 453 selfloop transitions, 139 changer transitions 9/608 dead transitions. [2024-06-27 19:28:23,070 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 443 places, 608 transitions, 10695 flow [2024-06-27 19:28:23,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:28:23,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:28:23,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 211 transitions. [2024-06-27 19:28:23,080 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.659375 [2024-06-27 19:28:23,081 INFO L175 Difference]: Start difference. First operand has 436 places, 561 transitions, 8742 flow. Second operand 8 states and 211 transitions. [2024-06-27 19:28:23,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 443 places, 608 transitions, 10695 flow [2024-06-27 19:28:30,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 426 places, 608 transitions, 10397 flow, removed 10 selfloop flow, removed 17 redundant places. [2024-06-27 19:28:30,755 INFO L231 Difference]: Finished difference. Result has 428 places, 560 transitions, 8816 flow [2024-06-27 19:28:30,756 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8456, PETRI_DIFFERENCE_MINUEND_PLACES=419, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=561, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=422, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8816, PETRI_PLACES=428, PETRI_TRANSITIONS=560} [2024-06-27 19:28:30,756 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 387 predicate places. [2024-06-27 19:28:30,756 INFO L495 AbstractCegarLoop]: Abstraction has has 428 places, 560 transitions, 8816 flow [2024-06-27 19:28:30,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:28:30,757 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:28:30,757 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:28:30,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2024-06-27 19:28:30,757 INFO L420 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:28:30,757 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:28:30,757 INFO L85 PathProgramCache]: Analyzing trace with hash -734982987, now seen corresponding path program 8 times [2024-06-27 19:28:30,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:28:30,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72359646] [2024-06-27 19:28:30,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:28:30,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:28:30,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:28:30,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:28:30,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:28:30,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72359646] [2024-06-27 19:28:30,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72359646] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:28:30,891 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:28:30,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:28:30,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233846228] [2024-06-27 19:28:30,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:28:30,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:28:30,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:28:30,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:28:30,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:28:30,947 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:28:30,948 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 428 places, 560 transitions, 8816 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:28:30,948 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:28:30,948 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:28:30,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:28:33,146 INFO L124 PetriNetUnfolderBase]: 4842/8287 cut-off events. [2024-06-27 19:28:33,147 INFO L125 PetriNetUnfolderBase]: For 1916933/1916937 co-relation queries the response was YES. [2024-06-27 19:28:33,230 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80298 conditions, 8287 events. 4842/8287 cut-off events. For 1916933/1916937 co-relation queries the response was YES. Maximal size of possible extension queue 538. Compared 60865 event pairs, 1155 based on Foata normal form. 7/8289 useless extension candidates. Maximal degree in co-relation 80090. Up to 5197 conditions per place. [2024-06-27 19:28:33,259 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 443 selfloop transitions, 144 changer transitions 8/602 dead transitions. [2024-06-27 19:28:33,260 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 434 places, 602 transitions, 10734 flow [2024-06-27 19:28:33,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:28:33,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:28:33,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 205 transitions. [2024-06-27 19:28:33,261 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.640625 [2024-06-27 19:28:33,261 INFO L175 Difference]: Start difference. First operand has 428 places, 560 transitions, 8816 flow. Second operand 8 states and 205 transitions. [2024-06-27 19:28:33,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 434 places, 602 transitions, 10734 flow [2024-06-27 19:28:41,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 429 places, 602 transitions, 10533 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-27 19:28:41,620 INFO L231 Difference]: Finished difference. Result has 431 places, 558 transitions, 8916 flow [2024-06-27 19:28:41,621 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8623, PETRI_DIFFERENCE_MINUEND_PLACES=422, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=560, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=143, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=416, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8916, PETRI_PLACES=431, PETRI_TRANSITIONS=558} [2024-06-27 19:28:41,621 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 390 predicate places. [2024-06-27 19:28:41,621 INFO L495 AbstractCegarLoop]: Abstraction has has 431 places, 558 transitions, 8916 flow [2024-06-27 19:28:41,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:28:41,621 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:28:41,621 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:28:41,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159 [2024-06-27 19:28:41,622 INFO L420 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:28:41,622 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:28:41,622 INFO L85 PathProgramCache]: Analyzing trace with hash -646327947, now seen corresponding path program 9 times [2024-06-27 19:28:41,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:28:41,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127848659] [2024-06-27 19:28:41,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:28:41,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:28:41,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:28:41,732 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:28:41,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:28:41,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127848659] [2024-06-27 19:28:41,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127848659] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:28:41,737 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:28:41,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:28:41,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319446188] [2024-06-27 19:28:41,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:28:41,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:28:41,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:28:41,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:28:41,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:28:41,825 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:28:41,825 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 431 places, 558 transitions, 8916 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:28:41,825 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:28:41,825 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:28:41,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:28:44,063 INFO L124 PetriNetUnfolderBase]: 4757/8128 cut-off events. [2024-06-27 19:28:44,063 INFO L125 PetriNetUnfolderBase]: For 1938188/1938192 co-relation queries the response was YES. [2024-06-27 19:28:44,140 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76999 conditions, 8128 events. 4757/8128 cut-off events. For 1938188/1938192 co-relation queries the response was YES. Maximal size of possible extension queue 533. Compared 59430 event pairs, 1527 based on Foata normal form. 35/8158 useless extension candidates. Maximal degree in co-relation 76790. Up to 6912 conditions per place. [2024-06-27 19:28:44,167 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 458 selfloop transitions, 110 changer transitions 8/583 dead transitions. [2024-06-27 19:28:44,168 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 436 places, 583 transitions, 10188 flow [2024-06-27 19:28:44,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:28:44,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:28:44,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 193 transitions. [2024-06-27 19:28:44,169 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.603125 [2024-06-27 19:28:44,169 INFO L175 Difference]: Start difference. First operand has 431 places, 558 transitions, 8916 flow. Second operand 8 states and 193 transitions. [2024-06-27 19:28:44,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 436 places, 583 transitions, 10188 flow [2024-06-27 19:28:51,964 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 430 places, 583 transitions, 9994 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-27 19:28:51,971 INFO L231 Difference]: Finished difference. Result has 431 places, 553 transitions, 8864 flow [2024-06-27 19:28:51,972 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8722, PETRI_DIFFERENCE_MINUEND_PLACES=423, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=558, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=448, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8864, PETRI_PLACES=431, PETRI_TRANSITIONS=553} [2024-06-27 19:28:51,972 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 390 predicate places. [2024-06-27 19:28:51,972 INFO L495 AbstractCegarLoop]: Abstraction has has 431 places, 553 transitions, 8864 flow [2024-06-27 19:28:51,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:28:51,972 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:28:51,972 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:28:51,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160 [2024-06-27 19:28:51,973 INFO L420 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:28:51,973 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:28:51,973 INFO L85 PathProgramCache]: Analyzing trace with hash -418426797, now seen corresponding path program 10 times [2024-06-27 19:28:51,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:28:51,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783440585] [2024-06-27 19:28:51,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:28:51,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:28:51,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:28:52,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:28:52,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:28:52,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783440585] [2024-06-27 19:28:52,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783440585] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:28:52,087 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:28:52,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:28:52,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116704207] [2024-06-27 19:28:52,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:28:52,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:28:52,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:28:52,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:28:52,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:28:52,131 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:28:52,131 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 431 places, 553 transitions, 8864 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:28:52,131 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:28:52,131 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:28:52,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:28:54,225 INFO L124 PetriNetUnfolderBase]: 4616/7891 cut-off events. [2024-06-27 19:28:54,225 INFO L125 PetriNetUnfolderBase]: For 1668459/1668463 co-relation queries the response was YES. [2024-06-27 19:28:54,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74428 conditions, 7891 events. 4616/7891 cut-off events. For 1668459/1668463 co-relation queries the response was YES. Maximal size of possible extension queue 522. Compared 57428 event pairs, 1498 based on Foata normal form. 9/7893 useless extension candidates. Maximal degree in co-relation 74220. Up to 7041 conditions per place. [2024-06-27 19:28:54,338 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 461 selfloop transitions, 101 changer transitions 7/576 dead transitions. [2024-06-27 19:28:54,339 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 438 places, 576 transitions, 10104 flow [2024-06-27 19:28:54,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:28:54,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:28:54,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-27 19:28:54,339 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.596875 [2024-06-27 19:28:54,340 INFO L175 Difference]: Start difference. First operand has 431 places, 553 transitions, 8864 flow. Second operand 8 states and 191 transitions. [2024-06-27 19:28:54,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 438 places, 576 transitions, 10104 flow [2024-06-27 19:29:01,226 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 429 places, 576 transitions, 9828 flow, removed 3 selfloop flow, removed 9 redundant places. [2024-06-27 19:29:01,233 INFO L231 Difference]: Finished difference. Result has 430 places, 550 transitions, 8737 flow [2024-06-27 19:29:01,233 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8590, PETRI_DIFFERENCE_MINUEND_PLACES=422, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=553, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=452, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8737, PETRI_PLACES=430, PETRI_TRANSITIONS=550} [2024-06-27 19:29:01,234 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 389 predicate places. [2024-06-27 19:29:01,234 INFO L495 AbstractCegarLoop]: Abstraction has has 430 places, 550 transitions, 8737 flow [2024-06-27 19:29:01,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:29:01,234 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:29:01,234 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:29:01,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161 [2024-06-27 19:29:01,234 INFO L420 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:29:01,235 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:29:01,235 INFO L85 PathProgramCache]: Analyzing trace with hash -421283757, now seen corresponding path program 11 times [2024-06-27 19:29:01,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:29:01,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582512120] [2024-06-27 19:29:01,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:29:01,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:29:01,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:29:01,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:29:01,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:29:01,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582512120] [2024-06-27 19:29:01,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582512120] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:29:01,344 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:29:01,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:29:01,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693921233] [2024-06-27 19:29:01,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:29:01,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:29:01,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:29:01,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:29:01,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:29:01,400 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:29:01,400 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 430 places, 550 transitions, 8737 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:29:01,400 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:29:01,400 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:29:01,401 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:29:03,522 INFO L124 PetriNetUnfolderBase]: 4523/7730 cut-off events. [2024-06-27 19:29:03,522 INFO L125 PetriNetUnfolderBase]: For 1611154/1611158 co-relation queries the response was YES. [2024-06-27 19:29:03,596 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72254 conditions, 7730 events. 4523/7730 cut-off events. For 1611154/1611158 co-relation queries the response was YES. Maximal size of possible extension queue 516. Compared 55930 event pairs, 1316 based on Foata normal form. 9/7732 useless extension candidates. Maximal degree in co-relation 72046. Up to 6589 conditions per place. [2024-06-27 19:29:03,621 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 450 selfloop transitions, 112 changer transitions 10/579 dead transitions. [2024-06-27 19:29:03,621 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 579 transitions, 10025 flow [2024-06-27 19:29:03,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:29:03,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:29:03,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-27 19:29:03,622 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6125 [2024-06-27 19:29:03,622 INFO L175 Difference]: Start difference. First operand has 430 places, 550 transitions, 8737 flow. Second operand 8 states and 196 transitions. [2024-06-27 19:29:03,622 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 579 transitions, 10025 flow [2024-06-27 19:29:10,161 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 428 places, 579 transitions, 9807 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-27 19:29:10,168 INFO L231 Difference]: Finished difference. Result has 429 places, 546 transitions, 8688 flow [2024-06-27 19:29:10,168 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8519, PETRI_DIFFERENCE_MINUEND_PLACES=421, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=550, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=438, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8688, PETRI_PLACES=429, PETRI_TRANSITIONS=546} [2024-06-27 19:29:10,168 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 388 predicate places. [2024-06-27 19:29:10,168 INFO L495 AbstractCegarLoop]: Abstraction has has 429 places, 546 transitions, 8688 flow [2024-06-27 19:29:10,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:29:10,168 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:29:10,169 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:29:10,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162 [2024-06-27 19:29:10,169 INFO L420 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:29:10,169 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:29:10,169 INFO L85 PathProgramCache]: Analyzing trace with hash -646654377, now seen corresponding path program 12 times [2024-06-27 19:29:10,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:29:10,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243456032] [2024-06-27 19:29:10,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:29:10,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:29:10,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:29:10,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:29:10,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:29:10,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243456032] [2024-06-27 19:29:10,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243456032] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:29:10,261 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:29:10,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:29:10,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827036502] [2024-06-27 19:29:10,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:29:10,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:29:10,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:29:10,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:29:10,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:29:10,310 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:29:10,310 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 429 places, 546 transitions, 8688 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:29:10,310 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:29:10,310 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:29:10,310 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:29:12,238 INFO L124 PetriNetUnfolderBase]: 4320/7373 cut-off events. [2024-06-27 19:29:12,238 INFO L125 PetriNetUnfolderBase]: For 1557295/1557299 co-relation queries the response was YES. [2024-06-27 19:29:12,313 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67261 conditions, 7373 events. 4320/7373 cut-off events. For 1557295/1557299 co-relation queries the response was YES. Maximal size of possible extension queue 502. Compared 52927 event pairs, 1023 based on Foata normal form. 31/7399 useless extension candidates. Maximal degree in co-relation 67054. Up to 5395 conditions per place. [2024-06-27 19:29:12,340 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 438 selfloop transitions, 121 changer transitions 14/580 dead transitions. [2024-06-27 19:29:12,341 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 436 places, 580 transitions, 10226 flow [2024-06-27 19:29:12,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:29:12,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:29:12,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 201 transitions. [2024-06-27 19:29:12,342 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.628125 [2024-06-27 19:29:12,342 INFO L175 Difference]: Start difference. First operand has 429 places, 546 transitions, 8688 flow. Second operand 8 states and 201 transitions. [2024-06-27 19:29:12,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 436 places, 580 transitions, 10226 flow [2024-06-27 19:29:18,200 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 427 places, 580 transitions, 9951 flow, removed 6 selfloop flow, removed 9 redundant places. [2024-06-27 19:29:18,207 INFO L231 Difference]: Finished difference. Result has 428 places, 535 transitions, 8457 flow [2024-06-27 19:29:18,207 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8415, PETRI_DIFFERENCE_MINUEND_PLACES=420, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=546, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=425, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8457, PETRI_PLACES=428, PETRI_TRANSITIONS=535} [2024-06-27 19:29:18,208 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 387 predicate places. [2024-06-27 19:29:18,208 INFO L495 AbstractCegarLoop]: Abstraction has has 428 places, 535 transitions, 8457 flow [2024-06-27 19:29:18,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:29:18,208 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:29:18,208 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:29:18,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163 [2024-06-27 19:29:18,208 INFO L420 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:29:18,209 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:29:18,209 INFO L85 PathProgramCache]: Analyzing trace with hash 394089829, now seen corresponding path program 10 times [2024-06-27 19:29:18,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:29:18,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155602401] [2024-06-27 19:29:18,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:29:18,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:29:18,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:29:18,305 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:29:18,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:29:18,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155602401] [2024-06-27 19:29:18,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155602401] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:29:18,306 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:29:18,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:29:18,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687687627] [2024-06-27 19:29:18,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:29:18,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:29:18,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:29:18,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:29:18,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:29:18,366 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:29:18,366 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 428 places, 535 transitions, 8457 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:29:18,366 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:29:18,366 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:29:18,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:29:20,139 INFO L124 PetriNetUnfolderBase]: 4191/7110 cut-off events. [2024-06-27 19:29:20,140 INFO L125 PetriNetUnfolderBase]: For 1484791/1484795 co-relation queries the response was YES. [2024-06-27 19:29:20,213 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67941 conditions, 7110 events. 4191/7110 cut-off events. For 1484791/1484795 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 50394 event pairs, 1223 based on Foata normal form. 9/7111 useless extension candidates. Maximal degree in co-relation 67734. Up to 5996 conditions per place. [2024-06-27 19:29:20,239 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 392 selfloop transitions, 173 changer transitions 0/572 dead transitions. [2024-06-27 19:29:20,240 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 572 transitions, 10079 flow [2024-06-27 19:29:20,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:29:20,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:29:20,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 235 transitions. [2024-06-27 19:29:20,241 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5875 [2024-06-27 19:29:20,241 INFO L175 Difference]: Start difference. First operand has 428 places, 535 transitions, 8457 flow. Second operand 10 states and 235 transitions. [2024-06-27 19:29:20,241 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 572 transitions, 10079 flow [2024-06-27 19:29:25,121 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 424 places, 572 transitions, 9693 flow, removed 6 selfloop flow, removed 13 redundant places. [2024-06-27 19:29:25,128 INFO L231 Difference]: Finished difference. Result has 425 places, 537 transitions, 8541 flow [2024-06-27 19:29:25,128 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8077, PETRI_DIFFERENCE_MINUEND_PLACES=415, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=535, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=172, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=363, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8541, PETRI_PLACES=425, PETRI_TRANSITIONS=537} [2024-06-27 19:29:25,128 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 384 predicate places. [2024-06-27 19:29:25,128 INFO L495 AbstractCegarLoop]: Abstraction has has 425 places, 537 transitions, 8541 flow [2024-06-27 19:29:25,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:29:25,129 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:29:25,129 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:29:25,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164 [2024-06-27 19:29:25,129 INFO L420 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:29:25,129 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:29:25,129 INFO L85 PathProgramCache]: Analyzing trace with hash 402660709, now seen corresponding path program 11 times [2024-06-27 19:29:25,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:29:25,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117135015] [2024-06-27 19:29:25,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:29:25,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:29:25,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:29:25,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:29:25,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:29:25,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117135015] [2024-06-27 19:29:25,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117135015] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:29:25,220 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:29:25,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:29:25,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782772769] [2024-06-27 19:29:25,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:29:25,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:29:25,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:29:25,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:29:25,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:29:25,274 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:29:25,274 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 425 places, 537 transitions, 8541 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:29:25,274 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:29:25,274 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:29:25,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:29:26,959 INFO L124 PetriNetUnfolderBase]: 4219/7170 cut-off events. [2024-06-27 19:29:26,959 INFO L125 PetriNetUnfolderBase]: For 1473765/1473769 co-relation queries the response was YES. [2024-06-27 19:29:27,027 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67977 conditions, 7170 events. 4219/7170 cut-off events. For 1473765/1473769 co-relation queries the response was YES. Maximal size of possible extension queue 502. Compared 50896 event pairs, 1265 based on Foata normal form. 9/7175 useless extension candidates. Maximal degree in co-relation 67773. Up to 6234 conditions per place. [2024-06-27 19:29:27,054 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 387 selfloop transitions, 171 changer transitions 0/565 dead transitions. [2024-06-27 19:29:27,054 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 434 places, 565 transitions, 9809 flow [2024-06-27 19:29:27,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:29:27,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:29:27,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 228 transitions. [2024-06-27 19:29:27,055 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.57 [2024-06-27 19:29:27,055 INFO L175 Difference]: Start difference. First operand has 425 places, 537 transitions, 8541 flow. Second operand 10 states and 228 transitions. [2024-06-27 19:29:27,055 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 434 places, 565 transitions, 9809 flow [2024-06-27 19:29:33,495 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 428 places, 565 transitions, 9525 flow, removed 29 selfloop flow, removed 6 redundant places. [2024-06-27 19:29:33,501 INFO L231 Difference]: Finished difference. Result has 429 places, 538 transitions, 8664 flow [2024-06-27 19:29:33,502 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8265, PETRI_DIFFERENCE_MINUEND_PLACES=419, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=537, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=170, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=366, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8664, PETRI_PLACES=429, PETRI_TRANSITIONS=538} [2024-06-27 19:29:33,502 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 388 predicate places. [2024-06-27 19:29:33,502 INFO L495 AbstractCegarLoop]: Abstraction has has 429 places, 538 transitions, 8664 flow [2024-06-27 19:29:33,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:29:33,502 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:29:33,502 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:29:33,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165 [2024-06-27 19:29:33,503 INFO L420 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:29:33,503 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:29:33,503 INFO L85 PathProgramCache]: Analyzing trace with hash -464190055, now seen corresponding path program 12 times [2024-06-27 19:29:33,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:29:33,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139046679] [2024-06-27 19:29:33,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:29:33,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:29:33,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:29:33,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:29:33,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:29:33,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139046679] [2024-06-27 19:29:33,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139046679] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:29:33,599 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:29:33,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:29:33,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459892987] [2024-06-27 19:29:33,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:29:33,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:29:33,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:29:33,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:29:33,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:29:33,649 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:29:33,649 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 429 places, 538 transitions, 8664 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:29:33,649 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:29:33,649 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:29:33,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:29:35,652 INFO L124 PetriNetUnfolderBase]: 4293/7272 cut-off events. [2024-06-27 19:29:35,652 INFO L125 PetriNetUnfolderBase]: For 1570027/1570031 co-relation queries the response was YES. [2024-06-27 19:29:35,718 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70477 conditions, 7272 events. 4293/7272 cut-off events. For 1570027/1570031 co-relation queries the response was YES. Maximal size of possible extension queue 512. Compared 51581 event pairs, 1257 based on Foata normal form. 9/7273 useless extension candidates. Maximal degree in co-relation 70271. Up to 6154 conditions per place. [2024-06-27 19:29:35,744 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 406 selfloop transitions, 169 changer transitions 0/582 dead transitions. [2024-06-27 19:29:35,744 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 439 places, 582 transitions, 10326 flow [2024-06-27 19:29:35,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 19:29:35,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 19:29:35,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 260 transitions. [2024-06-27 19:29:35,745 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5909090909090909 [2024-06-27 19:29:35,745 INFO L175 Difference]: Start difference. First operand has 429 places, 538 transitions, 8664 flow. Second operand 11 states and 260 transitions. [2024-06-27 19:29:35,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 439 places, 582 transitions, 10326 flow [2024-06-27 19:29:41,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 431 places, 582 transitions, 9953 flow, removed 17 selfloop flow, removed 8 redundant places. [2024-06-27 19:29:41,963 INFO L231 Difference]: Finished difference. Result has 432 places, 540 transitions, 8751 flow [2024-06-27 19:29:41,964 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8291, PETRI_DIFFERENCE_MINUEND_PLACES=421, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=538, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=168, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=370, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8751, PETRI_PLACES=432, PETRI_TRANSITIONS=540} [2024-06-27 19:29:41,964 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 391 predicate places. [2024-06-27 19:29:41,964 INFO L495 AbstractCegarLoop]: Abstraction has has 432 places, 540 transitions, 8751 flow [2024-06-27 19:29:41,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:29:41,964 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:29:41,965 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:29:41,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166 [2024-06-27 19:29:41,965 INFO L420 AbstractCegarLoop]: === Iteration 168 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:29:41,965 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:29:41,965 INFO L85 PathProgramCache]: Analyzing trace with hash 1361568681, now seen corresponding path program 13 times [2024-06-27 19:29:41,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:29:41,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621577540] [2024-06-27 19:29:41,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:29:41,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:29:41,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:29:42,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:29:42,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:29:42,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621577540] [2024-06-27 19:29:42,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621577540] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:29:42,066 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:29:42,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:29:42,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399287768] [2024-06-27 19:29:42,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:29:42,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:29:42,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:29:42,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:29:42,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:29:42,123 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:29:42,123 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 432 places, 540 transitions, 8751 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:29:42,123 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:29:42,123 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:29:42,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:29:44,149 INFO L124 PetriNetUnfolderBase]: 4275/7258 cut-off events. [2024-06-27 19:29:44,149 INFO L125 PetriNetUnfolderBase]: For 1536646/1536650 co-relation queries the response was YES. [2024-06-27 19:29:44,217 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69262 conditions, 7258 events. 4275/7258 cut-off events. For 1536646/1536650 co-relation queries the response was YES. Maximal size of possible extension queue 513. Compared 51590 event pairs, 1277 based on Foata normal form. 9/7263 useless extension candidates. Maximal degree in co-relation 69055. Up to 6322 conditions per place. [2024-06-27 19:29:44,243 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 400 selfloop transitions, 167 changer transitions 0/574 dead transitions. [2024-06-27 19:29:44,243 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 442 places, 574 transitions, 9997 flow [2024-06-27 19:29:44,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 19:29:44,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 19:29:44,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 253 transitions. [2024-06-27 19:29:44,244 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.575 [2024-06-27 19:29:44,244 INFO L175 Difference]: Start difference. First operand has 432 places, 540 transitions, 8751 flow. Second operand 11 states and 253 transitions. [2024-06-27 19:29:44,244 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 442 places, 574 transitions, 9997 flow [2024-06-27 19:29:49,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 435 places, 574 transitions, 9695 flow, removed 42 selfloop flow, removed 7 redundant places. [2024-06-27 19:29:49,708 INFO L231 Difference]: Finished difference. Result has 436 places, 540 transitions, 8788 flow [2024-06-27 19:29:49,708 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8449, PETRI_DIFFERENCE_MINUEND_PLACES=425, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=540, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=167, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=373, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8788, PETRI_PLACES=436, PETRI_TRANSITIONS=540} [2024-06-27 19:29:49,709 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 395 predicate places. [2024-06-27 19:29:49,709 INFO L495 AbstractCegarLoop]: Abstraction has has 436 places, 540 transitions, 8788 flow [2024-06-27 19:29:49,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:29:49,709 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:29:49,709 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:29:49,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167 [2024-06-27 19:29:49,709 INFO L420 AbstractCegarLoop]: === Iteration 169 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:29:49,709 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:29:49,710 INFO L85 PathProgramCache]: Analyzing trace with hash 689548039, now seen corresponding path program 14 times [2024-06-27 19:29:49,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:29:49,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790932173] [2024-06-27 19:29:49,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:29:49,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:29:49,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:29:49,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:29:49,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:29:49,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790932173] [2024-06-27 19:29:49,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790932173] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:29:49,809 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:29:49,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:29:49,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978699182] [2024-06-27 19:29:49,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:29:49,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:29:49,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:29:49,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:29:49,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:29:49,865 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:29:49,865 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 436 places, 540 transitions, 8788 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:29:49,865 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:29:49,865 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:29:49,865 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:29:51,914 INFO L124 PetriNetUnfolderBase]: 4257/7232 cut-off events. [2024-06-27 19:29:51,915 INFO L125 PetriNetUnfolderBase]: For 1492231/1492235 co-relation queries the response was YES. [2024-06-27 19:29:51,983 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67890 conditions, 7232 events. 4257/7232 cut-off events. For 1492231/1492235 co-relation queries the response was YES. Maximal size of possible extension queue 513. Compared 51464 event pairs, 1269 based on Foata normal form. 9/7237 useless extension candidates. Maximal degree in co-relation 67681. Up to 6296 conditions per place. [2024-06-27 19:29:52,009 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 387 selfloop transitions, 170 changer transitions 0/564 dead transitions. [2024-06-27 19:29:52,009 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 445 places, 564 transitions, 9988 flow [2024-06-27 19:29:52,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:29:52,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:29:52,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 226 transitions. [2024-06-27 19:29:52,010 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.565 [2024-06-27 19:29:52,010 INFO L175 Difference]: Start difference. First operand has 436 places, 540 transitions, 8788 flow. Second operand 10 states and 226 transitions. [2024-06-27 19:29:52,010 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 445 places, 564 transitions, 9988 flow [2024-06-27 19:29:57,566 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 435 places, 564 transitions, 9610 flow, removed 17 selfloop flow, removed 10 redundant places. [2024-06-27 19:29:57,573 INFO L231 Difference]: Finished difference. Result has 436 places, 540 transitions, 8755 flow [2024-06-27 19:29:57,573 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8410, PETRI_DIFFERENCE_MINUEND_PLACES=426, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=540, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=170, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=370, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8755, PETRI_PLACES=436, PETRI_TRANSITIONS=540} [2024-06-27 19:29:57,573 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 395 predicate places. [2024-06-27 19:29:57,573 INFO L495 AbstractCegarLoop]: Abstraction has has 436 places, 540 transitions, 8755 flow [2024-06-27 19:29:57,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:29:57,574 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:29:57,574 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:29:57,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable168 [2024-06-27 19:29:57,574 INFO L420 AbstractCegarLoop]: === Iteration 170 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:29:57,574 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:29:57,574 INFO L85 PathProgramCache]: Analyzing trace with hash -606293125, now seen corresponding path program 15 times [2024-06-27 19:29:57,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:29:57,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823523317] [2024-06-27 19:29:57,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:29:57,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:29:57,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:29:57,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:29:57,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:29:57,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823523317] [2024-06-27 19:29:57,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823523317] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:29:57,686 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:29:57,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:29:57,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947037402] [2024-06-27 19:29:57,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:29:57,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:29:57,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:29:57,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:29:57,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:29:57,731 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:29:57,731 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 436 places, 540 transitions, 8755 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:29:57,732 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:29:57,732 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:29:57,732 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:29:59,784 INFO L124 PetriNetUnfolderBase]: 4551/7740 cut-off events. [2024-06-27 19:29:59,785 INFO L125 PetriNetUnfolderBase]: For 1892432/1892436 co-relation queries the response was YES. [2024-06-27 19:29:59,863 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77511 conditions, 7740 events. 4551/7740 cut-off events. For 1892432/1892436 co-relation queries the response was YES. Maximal size of possible extension queue 526. Compared 55757 event pairs, 1284 based on Foata normal form. 7/7743 useless extension candidates. Maximal degree in co-relation 77301. Up to 5092 conditions per place. [2024-06-27 19:29:59,893 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 417 selfloop transitions, 169 changer transitions 0/593 dead transitions. [2024-06-27 19:29:59,893 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 446 places, 593 transitions, 10775 flow [2024-06-27 19:29:59,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 19:29:59,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 19:29:59,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 267 transitions. [2024-06-27 19:29:59,894 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6068181818181818 [2024-06-27 19:29:59,894 INFO L175 Difference]: Start difference. First operand has 436 places, 540 transitions, 8755 flow. Second operand 11 states and 267 transitions. [2024-06-27 19:29:59,894 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 446 places, 593 transitions, 10775 flow [2024-06-27 19:30:08,327 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 437 places, 593 transitions, 10418 flow, removed 3 selfloop flow, removed 9 redundant places. [2024-06-27 19:30:08,334 INFO L231 Difference]: Finished difference. Result has 439 places, 543 transitions, 8956 flow [2024-06-27 19:30:08,334 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8398, PETRI_DIFFERENCE_MINUEND_PLACES=427, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=540, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=167, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=372, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8956, PETRI_PLACES=439, PETRI_TRANSITIONS=543} [2024-06-27 19:30:08,334 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 398 predicate places. [2024-06-27 19:30:08,334 INFO L495 AbstractCegarLoop]: Abstraction has has 439 places, 543 transitions, 8956 flow [2024-06-27 19:30:08,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:30:08,335 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:30:08,335 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:30:08,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable169 [2024-06-27 19:30:08,335 INFO L420 AbstractCegarLoop]: === Iteration 171 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:30:08,335 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:30:08,335 INFO L85 PathProgramCache]: Analyzing trace with hash -606172969, now seen corresponding path program 13 times [2024-06-27 19:30:08,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:30:08,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250203601] [2024-06-27 19:30:08,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:30:08,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:30:08,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:30:08,425 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:30:08,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:30:08,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250203601] [2024-06-27 19:30:08,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250203601] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:30:08,426 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:30:08,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:30:08,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103526670] [2024-06-27 19:30:08,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:30:08,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:30:08,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:30:08,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:30:08,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:30:08,475 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:30:08,475 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 439 places, 543 transitions, 8956 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:30:08,475 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:30:08,476 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:30:08,476 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:30:10,617 INFO L124 PetriNetUnfolderBase]: 4601/7849 cut-off events. [2024-06-27 19:30:10,617 INFO L125 PetriNetUnfolderBase]: For 2002911/2002915 co-relation queries the response was YES. [2024-06-27 19:30:10,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77508 conditions, 7849 events. 4601/7849 cut-off events. For 2002911/2002915 co-relation queries the response was YES. Maximal size of possible extension queue 527. Compared 56925 event pairs, 1387 based on Foata normal form. 25/7861 useless extension candidates. Maximal degree in co-relation 77296. Up to 6773 conditions per place. [2024-06-27 19:30:10,724 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 527 selfloop transitions, 45 changer transitions 0/579 dead transitions. [2024-06-27 19:30:10,725 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 447 places, 579 transitions, 10484 flow [2024-06-27 19:30:10,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:30:10,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:30:10,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 207 transitions. [2024-06-27 19:30:10,725 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.575 [2024-06-27 19:30:10,725 INFO L175 Difference]: Start difference. First operand has 439 places, 543 transitions, 8956 flow. Second operand 9 states and 207 transitions. [2024-06-27 19:30:10,726 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 447 places, 579 transitions, 10484 flow [2024-06-27 19:30:19,173 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 439 places, 579 transitions, 9979 flow, removed 42 selfloop flow, removed 8 redundant places. [2024-06-27 19:30:19,180 INFO L231 Difference]: Finished difference. Result has 440 places, 544 transitions, 8554 flow [2024-06-27 19:30:19,180 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8451, PETRI_DIFFERENCE_MINUEND_PLACES=431, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=543, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=499, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8554, PETRI_PLACES=440, PETRI_TRANSITIONS=544} [2024-06-27 19:30:19,181 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 399 predicate places. [2024-06-27 19:30:19,181 INFO L495 AbstractCegarLoop]: Abstraction has has 440 places, 544 transitions, 8554 flow [2024-06-27 19:30:19,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:30:19,181 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:30:19,181 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:30:19,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170 [2024-06-27 19:30:19,181 INFO L420 AbstractCegarLoop]: === Iteration 172 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:30:19,182 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:30:19,182 INFO L85 PathProgramCache]: Analyzing trace with hash -606173155, now seen corresponding path program 16 times [2024-06-27 19:30:19,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:30:19,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380786954] [2024-06-27 19:30:19,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:30:19,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:30:19,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:30:19,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:30:19,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:30:19,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380786954] [2024-06-27 19:30:19,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380786954] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:30:19,285 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:30:19,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:30:19,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174071221] [2024-06-27 19:30:19,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:30:19,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:30:19,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:30:19,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:30:19,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:30:19,344 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:30:19,344 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 440 places, 544 transitions, 8554 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:30:19,344 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:30:19,344 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:30:19,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:30:21,514 INFO L124 PetriNetUnfolderBase]: 4540/7740 cut-off events. [2024-06-27 19:30:21,514 INFO L125 PetriNetUnfolderBase]: For 1853848/1853852 co-relation queries the response was YES. [2024-06-27 19:30:21,591 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73056 conditions, 7740 events. 4540/7740 cut-off events. For 1853848/1853852 co-relation queries the response was YES. Maximal size of possible extension queue 527. Compared 55907 event pairs, 1371 based on Foata normal form. 25/7752 useless extension candidates. Maximal degree in co-relation 72844. Up to 6773 conditions per place. [2024-06-27 19:30:21,618 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 512 selfloop transitions, 40 changer transitions 19/578 dead transitions. [2024-06-27 19:30:21,618 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 448 places, 578 transitions, 9826 flow [2024-06-27 19:30:21,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:30:21,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:30:21,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 206 transitions. [2024-06-27 19:30:21,619 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5722222222222222 [2024-06-27 19:30:21,619 INFO L175 Difference]: Start difference. First operand has 440 places, 544 transitions, 8554 flow. Second operand 9 states and 206 transitions. [2024-06-27 19:30:21,619 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 448 places, 578 transitions, 9826 flow [2024-06-27 19:30:29,348 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 440 places, 578 transitions, 9554 flow, removed 41 selfloop flow, removed 8 redundant places. [2024-06-27 19:30:29,355 INFO L231 Difference]: Finished difference. Result has 441 places, 539 transitions, 8329 flow [2024-06-27 19:30:29,355 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8282, PETRI_DIFFERENCE_MINUEND_PLACES=432, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=544, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=504, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8329, PETRI_PLACES=441, PETRI_TRANSITIONS=539} [2024-06-27 19:30:29,356 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 400 predicate places. [2024-06-27 19:30:29,356 INFO L495 AbstractCegarLoop]: Abstraction has has 441 places, 539 transitions, 8329 flow [2024-06-27 19:30:29,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:30:29,356 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:30:29,356 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:30:29,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171 [2024-06-27 19:30:29,356 INFO L420 AbstractCegarLoop]: === Iteration 173 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:30:29,357 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:30:29,357 INFO L85 PathProgramCache]: Analyzing trace with hash 1476712167, now seen corresponding path program 14 times [2024-06-27 19:30:29,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:30:29,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820003744] [2024-06-27 19:30:29,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:30:29,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:30:29,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:30:29,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:30:29,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:30:29,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820003744] [2024-06-27 19:30:29,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820003744] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:30:29,461 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:30:29,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:30:29,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730132770] [2024-06-27 19:30:29,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:30:29,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:30:29,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:30:29,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:30:29,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:30:29,517 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:30:29,517 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 441 places, 539 transitions, 8329 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:30:29,517 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:30:29,517 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:30:29,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:30:31,847 INFO L124 PetriNetUnfolderBase]: 4799/8176 cut-off events. [2024-06-27 19:30:31,847 INFO L125 PetriNetUnfolderBase]: For 2193282/2193286 co-relation queries the response was YES. [2024-06-27 19:30:31,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78888 conditions, 8176 events. 4799/8176 cut-off events. For 2193282/2193286 co-relation queries the response was YES. Maximal size of possible extension queue 542. Compared 59586 event pairs, 1541 based on Foata normal form. 31/8203 useless extension candidates. Maximal degree in co-relation 78676. Up to 6776 conditions per place. [2024-06-27 19:30:31,945 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 514 selfloop transitions, 41 changer transitions 15/577 dead transitions. [2024-06-27 19:30:31,946 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 443 places, 577 transitions, 9936 flow [2024-06-27 19:30:31,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:30:31,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:30:31,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 207 transitions. [2024-06-27 19:30:31,947 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.575 [2024-06-27 19:30:31,947 INFO L175 Difference]: Start difference. First operand has 441 places, 539 transitions, 8329 flow. Second operand 9 states and 207 transitions. [2024-06-27 19:30:31,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 443 places, 577 transitions, 9936 flow [2024-06-27 19:30:40,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 436 places, 577 transitions, 9844 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-27 19:30:40,384 INFO L231 Difference]: Finished difference. Result has 438 places, 536 transitions, 8294 flow [2024-06-27 19:30:40,384 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8245, PETRI_DIFFERENCE_MINUEND_PLACES=428, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=539, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=498, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8294, PETRI_PLACES=438, PETRI_TRANSITIONS=536} [2024-06-27 19:30:40,384 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 397 predicate places. [2024-06-27 19:30:40,384 INFO L495 AbstractCegarLoop]: Abstraction has has 438 places, 536 transitions, 8294 flow [2024-06-27 19:30:40,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:30:40,385 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:30:40,385 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:30:40,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172 [2024-06-27 19:30:40,385 INFO L420 AbstractCegarLoop]: === Iteration 174 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:30:40,385 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:30:40,385 INFO L85 PathProgramCache]: Analyzing trace with hash 1477038597, now seen corresponding path program 15 times [2024-06-27 19:30:40,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:30:40,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300517757] [2024-06-27 19:30:40,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:30:40,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:30:40,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:30:40,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:30:40,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:30:40,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300517757] [2024-06-27 19:30:40,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300517757] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:30:40,490 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:30:40,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:30:40,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985838549] [2024-06-27 19:30:40,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:30:40,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:30:40,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:30:40,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:30:40,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:30:40,543 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:30:40,544 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 438 places, 536 transitions, 8294 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:30:40,544 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:30:40,544 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:30:40,544 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:30:42,537 INFO L124 PetriNetUnfolderBase]: 4558/7751 cut-off events. [2024-06-27 19:30:42,537 INFO L125 PetriNetUnfolderBase]: For 1934189/1934193 co-relation queries the response was YES. [2024-06-27 19:30:42,610 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72666 conditions, 7751 events. 4558/7751 cut-off events. For 1934189/1934193 co-relation queries the response was YES. Maximal size of possible extension queue 528. Compared 56008 event pairs, 1454 based on Foata normal form. 35/7780 useless extension candidates. Maximal degree in co-relation 72454. Up to 6908 conditions per place. [2024-06-27 19:30:42,815 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 502 selfloop transitions, 35 changer transitions 18/562 dead transitions. [2024-06-27 19:30:42,815 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 445 places, 562 transitions, 9516 flow [2024-06-27 19:30:42,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:30:42,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:30:42,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 197 transitions. [2024-06-27 19:30:42,816 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5472222222222223 [2024-06-27 19:30:42,816 INFO L175 Difference]: Start difference. First operand has 438 places, 536 transitions, 8294 flow. Second operand 9 states and 197 transitions. [2024-06-27 19:30:42,816 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 445 places, 562 transitions, 9516 flow [2024-06-27 19:30:49,871 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 437 places, 562 transitions, 9422 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-27 19:30:49,878 INFO L231 Difference]: Finished difference. Result has 438 places, 529 transitions, 8197 flow [2024-06-27 19:30:49,878 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8202, PETRI_DIFFERENCE_MINUEND_PLACES=429, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=536, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=501, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8197, PETRI_PLACES=438, PETRI_TRANSITIONS=529} [2024-06-27 19:30:49,878 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 397 predicate places. [2024-06-27 19:30:49,878 INFO L495 AbstractCegarLoop]: Abstraction has has 438 places, 529 transitions, 8197 flow [2024-06-27 19:30:49,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:30:49,878 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:30:49,879 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:30:49,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173 [2024-06-27 19:30:49,879 INFO L420 AbstractCegarLoop]: === Iteration 175 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:30:49,879 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:30:49,879 INFO L85 PathProgramCache]: Analyzing trace with hash 1791335995, now seen corresponding path program 16 times [2024-06-27 19:30:49,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:30:49,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864175060] [2024-06-27 19:30:49,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:30:49,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:30:49,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:30:49,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:30:49,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:30:49,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864175060] [2024-06-27 19:30:49,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864175060] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:30:49,986 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:30:49,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:30:49,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293016519] [2024-06-27 19:30:49,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:30:49,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:30:49,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:30:49,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:30:49,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:30:50,040 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:30:50,040 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 438 places, 529 transitions, 8197 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:30:50,040 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:30:50,040 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:30:50,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:30:51,965 INFO L124 PetriNetUnfolderBase]: 4476/7591 cut-off events. [2024-06-27 19:30:51,965 INFO L125 PetriNetUnfolderBase]: For 1930809/1930813 co-relation queries the response was YES. [2024-06-27 19:30:52,040 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71937 conditions, 7591 events. 4476/7591 cut-off events. For 1930809/1930813 co-relation queries the response was YES. Maximal size of possible extension queue 525. Compared 54399 event pairs, 1406 based on Foata normal form. 35/7620 useless extension candidates. Maximal degree in co-relation 71726. Up to 6726 conditions per place. [2024-06-27 19:30:52,065 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 474 selfloop transitions, 57 changer transitions 14/552 dead transitions. [2024-06-27 19:30:52,066 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 438 places, 552 transitions, 9391 flow [2024-06-27 19:30:52,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:30:52,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:30:52,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 204 transitions. [2024-06-27 19:30:52,066 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5666666666666667 [2024-06-27 19:30:52,067 INFO L175 Difference]: Start difference. First operand has 438 places, 529 transitions, 8197 flow. Second operand 9 states and 204 transitions. [2024-06-27 19:30:52,067 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 438 places, 552 transitions, 9391 flow [2024-06-27 19:30:59,066 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 433 places, 552 transitions, 9315 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-27 19:30:59,073 INFO L231 Difference]: Finished difference. Result has 434 places, 524 transitions, 8146 flow [2024-06-27 19:30:59,073 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8123, PETRI_DIFFERENCE_MINUEND_PLACES=425, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=529, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=472, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8146, PETRI_PLACES=434, PETRI_TRANSITIONS=524} [2024-06-27 19:30:59,073 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 393 predicate places. [2024-06-27 19:30:59,073 INFO L495 AbstractCegarLoop]: Abstraction has has 434 places, 524 transitions, 8146 flow [2024-06-27 19:30:59,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:30:59,073 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:30:59,074 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:30:59,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174 [2024-06-27 19:30:59,074 INFO L420 AbstractCegarLoop]: === Iteration 176 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:30:59,074 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:30:59,074 INFO L85 PathProgramCache]: Analyzing trace with hash 1780611235, now seen corresponding path program 17 times [2024-06-27 19:30:59,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:30:59,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60657835] [2024-06-27 19:30:59,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:30:59,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:30:59,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:30:59,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:30:59,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:30:59,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60657835] [2024-06-27 19:30:59,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60657835] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:30:59,177 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:30:59,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:30:59,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410476328] [2024-06-27 19:30:59,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:30:59,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:30:59,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:30:59,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:30:59,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:30:59,227 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:30:59,227 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 434 places, 524 transitions, 8146 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:30:59,227 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:30:59,227 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:30:59,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:31:01,107 INFO L124 PetriNetUnfolderBase]: 4460/7575 cut-off events. [2024-06-27 19:31:01,107 INFO L125 PetriNetUnfolderBase]: For 1932642/1932646 co-relation queries the response was YES. [2024-06-27 19:31:01,180 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71719 conditions, 7575 events. 4460/7575 cut-off events. For 1932642/1932646 co-relation queries the response was YES. Maximal size of possible extension queue 525. Compared 54371 event pairs, 1410 based on Foata normal form. 35/7604 useless extension candidates. Maximal degree in co-relation 71508. Up to 6716 conditions per place. [2024-06-27 19:31:01,206 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 475 selfloop transitions, 51 changer transitions 15/548 dead transitions. [2024-06-27 19:31:01,206 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 440 places, 548 transitions, 9334 flow [2024-06-27 19:31:01,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:31:01,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:31:01,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 218 transitions. [2024-06-27 19:31:01,207 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.545 [2024-06-27 19:31:01,207 INFO L175 Difference]: Start difference. First operand has 434 places, 524 transitions, 8146 flow. Second operand 10 states and 218 transitions. [2024-06-27 19:31:01,207 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 440 places, 548 transitions, 9334 flow [2024-06-27 19:31:08,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 432 places, 548 transitions, 9189 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-27 19:31:08,520 INFO L231 Difference]: Finished difference. Result has 433 places, 518 transitions, 8040 flow [2024-06-27 19:31:08,520 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8003, PETRI_DIFFERENCE_MINUEND_PLACES=423, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=524, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=473, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8040, PETRI_PLACES=433, PETRI_TRANSITIONS=518} [2024-06-27 19:31:08,520 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 392 predicate places. [2024-06-27 19:31:08,521 INFO L495 AbstractCegarLoop]: Abstraction has has 433 places, 518 transitions, 8040 flow [2024-06-27 19:31:08,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:31:08,521 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:31:08,521 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:31:08,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175 [2024-06-27 19:31:08,521 INFO L420 AbstractCegarLoop]: === Iteration 177 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:31:08,521 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:31:08,521 INFO L85 PathProgramCache]: Analyzing trace with hash -1278906117, now seen corresponding path program 18 times [2024-06-27 19:31:08,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:31:08,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51692556] [2024-06-27 19:31:08,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:31:08,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:31:08,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:31:08,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:31:08,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:31:08,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51692556] [2024-06-27 19:31:08,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51692556] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:31:08,643 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:31:08,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:31:08,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133090470] [2024-06-27 19:31:08,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:31:08,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:31:08,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:31:08,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:31:08,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:31:08,703 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:31:08,703 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 433 places, 518 transitions, 8040 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:31:08,703 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:31:08,703 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:31:08,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:31:10,696 INFO L124 PetriNetUnfolderBase]: 4562/7779 cut-off events. [2024-06-27 19:31:10,696 INFO L125 PetriNetUnfolderBase]: For 1900296/1900300 co-relation queries the response was YES. [2024-06-27 19:31:10,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72431 conditions, 7779 events. 4562/7779 cut-off events. For 1900296/1900300 co-relation queries the response was YES. Maximal size of possible extension queue 533. Compared 56324 event pairs, 1410 based on Foata normal form. 31/7806 useless extension candidates. Maximal degree in co-relation 72220. Up to 6690 conditions per place. [2024-06-27 19:31:10,791 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 473 selfloop transitions, 41 changer transitions 32/553 dead transitions. [2024-06-27 19:31:10,791 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 439 places, 553 transitions, 9342 flow [2024-06-27 19:31:10,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:31:10,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:31:10,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 221 transitions. [2024-06-27 19:31:10,792 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5525 [2024-06-27 19:31:10,792 INFO L175 Difference]: Start difference. First operand has 433 places, 518 transitions, 8040 flow. Second operand 10 states and 221 transitions. [2024-06-27 19:31:10,792 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 439 places, 553 transitions, 9342 flow [2024-06-27 19:31:18,658 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 430 places, 553 transitions, 9194 flow, removed 6 selfloop flow, removed 9 redundant places. [2024-06-27 19:31:18,664 INFO L231 Difference]: Finished difference. Result has 432 places, 508 transitions, 7811 flow [2024-06-27 19:31:18,665 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7894, PETRI_DIFFERENCE_MINUEND_PLACES=421, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=518, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=477, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7811, PETRI_PLACES=432, PETRI_TRANSITIONS=508} [2024-06-27 19:31:18,665 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 391 predicate places. [2024-06-27 19:31:18,665 INFO L495 AbstractCegarLoop]: Abstraction has has 432 places, 508 transitions, 7811 flow [2024-06-27 19:31:18,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:31:18,665 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:31:18,665 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:31:18,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176 [2024-06-27 19:31:18,666 INFO L420 AbstractCegarLoop]: === Iteration 178 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:31:18,666 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:31:18,666 INFO L85 PathProgramCache]: Analyzing trace with hash -294106433, now seen corresponding path program 19 times [2024-06-27 19:31:18,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:31:18,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510298798] [2024-06-27 19:31:18,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:31:18,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:31:18,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:31:18,753 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:31:18,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:31:18,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510298798] [2024-06-27 19:31:18,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510298798] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:31:18,754 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:31:18,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:31:18,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478099064] [2024-06-27 19:31:18,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:31:18,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:31:18,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:31:18,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:31:18,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:31:18,789 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:31:18,789 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 432 places, 508 transitions, 7811 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:31:18,789 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:31:18,790 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:31:18,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:31:20,574 INFO L124 PetriNetUnfolderBase]: 4353/7391 cut-off events. [2024-06-27 19:31:20,574 INFO L125 PetriNetUnfolderBase]: For 1736403/1736410 co-relation queries the response was YES. [2024-06-27 19:31:20,644 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70579 conditions, 7391 events. 4353/7391 cut-off events. For 1736403/1736410 co-relation queries the response was YES. Maximal size of possible extension queue 518. Compared 52863 event pairs, 1397 based on Foata normal form. 11/7393 useless extension candidates. Maximal degree in co-relation 70368. Up to 6564 conditions per place. [2024-06-27 19:31:20,667 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 416 selfloop transitions, 95 changer transitions 10/528 dead transitions. [2024-06-27 19:31:20,668 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 433 places, 528 transitions, 8935 flow [2024-06-27 19:31:20,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:31:20,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:31:20,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 183 transitions. [2024-06-27 19:31:20,668 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.571875 [2024-06-27 19:31:20,669 INFO L175 Difference]: Start difference. First operand has 432 places, 508 transitions, 7811 flow. Second operand 8 states and 183 transitions. [2024-06-27 19:31:20,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 433 places, 528 transitions, 8935 flow [2024-06-27 19:31:27,939 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 424 places, 528 transitions, 8793 flow, removed 13 selfloop flow, removed 9 redundant places. [2024-06-27 19:31:27,945 INFO L231 Difference]: Finished difference. Result has 425 places, 505 transitions, 7820 flow [2024-06-27 19:31:27,946 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7671, PETRI_DIFFERENCE_MINUEND_PLACES=417, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=508, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=413, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7820, PETRI_PLACES=425, PETRI_TRANSITIONS=505} [2024-06-27 19:31:27,946 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 384 predicate places. [2024-06-27 19:31:27,946 INFO L495 AbstractCegarLoop]: Abstraction has has 425 places, 505 transitions, 7820 flow [2024-06-27 19:31:27,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:31:27,946 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:31:27,946 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:31:27,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177 [2024-06-27 19:31:27,946 INFO L420 AbstractCegarLoop]: === Iteration 179 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:31:27,947 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:31:27,947 INFO L85 PathProgramCache]: Analyzing trace with hash -409397603, now seen corresponding path program 20 times [2024-06-27 19:31:27,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:31:27,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261485620] [2024-06-27 19:31:27,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:31:27,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:31:27,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:31:28,042 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 19:31:28,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:31:28,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261485620] [2024-06-27 19:31:28,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261485620] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:31:28,043 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:31:28,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:31:28,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65206890] [2024-06-27 19:31:28,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:31:28,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:31:28,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:31:28,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:31:28,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:31:28,111 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:31:28,112 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 425 places, 505 transitions, 7820 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:31:28,112 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:31:28,112 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:31:28,112 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:31:29,806 INFO L124 PetriNetUnfolderBase]: 4280/7255 cut-off events. [2024-06-27 19:31:29,806 INFO L125 PetriNetUnfolderBase]: For 1673284/1673288 co-relation queries the response was YES. [2024-06-27 19:31:29,873 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68942 conditions, 7255 events. 4280/7255 cut-off events. For 1673284/1673288 co-relation queries the response was YES. Maximal size of possible extension queue 513. Compared 51597 event pairs, 1334 based on Foata normal form. 9/7258 useless extension candidates. Maximal degree in co-relation 68733. Up to 6672 conditions per place. [2024-06-27 19:31:29,898 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 487 selfloop transitions, 16 changer transitions 10/520 dead transitions. [2024-06-27 19:31:29,898 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 428 places, 520 transitions, 8904 flow [2024-06-27 19:31:29,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:31:29,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:31:29,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 152 transitions. [2024-06-27 19:31:29,899 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5428571428571428 [2024-06-27 19:31:29,899 INFO L175 Difference]: Start difference. First operand has 425 places, 505 transitions, 7820 flow. Second operand 7 states and 152 transitions. [2024-06-27 19:31:29,899 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 428 places, 520 transitions, 8904 flow [2024-06-27 19:31:36,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 421 places, 520 transitions, 8706 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-27 19:31:36,271 INFO L231 Difference]: Finished difference. Result has 422 places, 501 transitions, 7581 flow [2024-06-27 19:31:36,271 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7622, PETRI_DIFFERENCE_MINUEND_PLACES=415, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=505, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=489, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7581, PETRI_PLACES=422, PETRI_TRANSITIONS=501} [2024-06-27 19:31:36,271 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 381 predicate places. [2024-06-27 19:31:36,271 INFO L495 AbstractCegarLoop]: Abstraction has has 422 places, 501 transitions, 7581 flow [2024-06-27 19:31:36,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:31:36,272 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:31:36,272 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:31:36,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable178 [2024-06-27 19:31:36,272 INFO L420 AbstractCegarLoop]: === Iteration 180 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:31:36,272 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:31:36,272 INFO L85 PathProgramCache]: Analyzing trace with hash -412254563, now seen corresponding path program 21 times [2024-06-27 19:31:36,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:31:36,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955593315] [2024-06-27 19:31:36,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:31:36,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:31:36,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:31:36,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:31:36,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:31:36,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955593315] [2024-06-27 19:31:36,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955593315] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:31:36,381 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:31:36,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:31:36,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309404627] [2024-06-27 19:31:36,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:31:36,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:31:36,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:31:36,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:31:36,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:31:36,447 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:31:36,448 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 422 places, 501 transitions, 7581 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:31:36,448 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:31:36,448 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:31:36,448 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:31:38,102 INFO L124 PetriNetUnfolderBase]: 4139/6992 cut-off events. [2024-06-27 19:31:38,102 INFO L125 PetriNetUnfolderBase]: For 1585159/1585163 co-relation queries the response was YES. [2024-06-27 19:31:38,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66237 conditions, 6992 events. 4139/6992 cut-off events. For 1585159/1585163 co-relation queries the response was YES. Maximal size of possible extension queue 506. Compared 49172 event pairs, 1234 based on Foata normal form. 9/6995 useless extension candidates. Maximal degree in co-relation 66029. Up to 6392 conditions per place. [2024-06-27 19:31:38,188 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 484 selfloop transitions, 13 changer transitions 16/520 dead transitions. [2024-06-27 19:31:38,188 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 425 places, 520 transitions, 8697 flow [2024-06-27 19:31:38,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:31:38,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:31:38,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 154 transitions. [2024-06-27 19:31:38,189 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.55 [2024-06-27 19:31:38,189 INFO L175 Difference]: Start difference. First operand has 422 places, 501 transitions, 7581 flow. Second operand 7 states and 154 transitions. [2024-06-27 19:31:38,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 425 places, 520 transitions, 8697 flow [2024-06-27 19:31:43,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 418 places, 520 transitions, 8597 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-27 19:31:43,738 INFO L231 Difference]: Finished difference. Result has 419 places, 496 transitions, 7439 flow [2024-06-27 19:31:43,738 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7481, PETRI_DIFFERENCE_MINUEND_PLACES=412, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=501, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=488, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7439, PETRI_PLACES=419, PETRI_TRANSITIONS=496} [2024-06-27 19:31:43,738 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 378 predicate places. [2024-06-27 19:31:43,738 INFO L495 AbstractCegarLoop]: Abstraction has has 419 places, 496 transitions, 7439 flow [2024-06-27 19:31:43,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:31:43,739 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:31:43,739 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:31:43,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable179 [2024-06-27 19:31:43,739 INFO L420 AbstractCegarLoop]: === Iteration 181 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:31:43,739 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:31:43,739 INFO L85 PathProgramCache]: Analyzing trace with hash -1785203669, now seen corresponding path program 22 times [2024-06-27 19:31:43,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:31:43,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104081985] [2024-06-27 19:31:43,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:31:43,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:31:43,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:31:43,838 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:31:43,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:31:43,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104081985] [2024-06-27 19:31:43,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104081985] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:31:43,839 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:31:43,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:31:43,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470294701] [2024-06-27 19:31:43,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:31:43,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:31:43,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:31:43,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:31:43,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:31:43,884 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:31:43,884 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 419 places, 496 transitions, 7439 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:31:43,884 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:31:43,884 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:31:43,884 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:31:45,572 INFO L124 PetriNetUnfolderBase]: 4114/6935 cut-off events. [2024-06-27 19:31:45,572 INFO L125 PetriNetUnfolderBase]: For 1745438/1745442 co-relation queries the response was YES. [2024-06-27 19:31:45,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65660 conditions, 6935 events. 4114/6935 cut-off events. For 1745438/1745442 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 48477 event pairs, 1222 based on Foata normal form. 35/6964 useless extension candidates. Maximal degree in co-relation 65453. Up to 6038 conditions per place. [2024-06-27 19:31:45,656 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 410 selfloop transitions, 91 changer transitions 14/522 dead transitions. [2024-06-27 19:31:45,657 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 423 places, 522 transitions, 8579 flow [2024-06-27 19:31:45,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:31:45,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:31:45,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 207 transitions. [2024-06-27 19:31:45,657 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.575 [2024-06-27 19:31:45,657 INFO L175 Difference]: Start difference. First operand has 419 places, 496 transitions, 7439 flow. Second operand 9 states and 207 transitions. [2024-06-27 19:31:45,658 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 423 places, 522 transitions, 8579 flow [2024-06-27 19:31:52,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 415 places, 522 transitions, 8465 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-06-27 19:31:52,472 INFO L231 Difference]: Finished difference. Result has 416 places, 491 transitions, 7437 flow [2024-06-27 19:31:52,472 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7325, PETRI_DIFFERENCE_MINUEND_PLACES=407, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=496, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=405, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7437, PETRI_PLACES=416, PETRI_TRANSITIONS=491} [2024-06-27 19:31:52,472 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 375 predicate places. [2024-06-27 19:31:52,472 INFO L495 AbstractCegarLoop]: Abstraction has has 416 places, 491 transitions, 7437 flow [2024-06-27 19:31:52,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:31:52,473 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:31:52,473 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:31:52,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180 [2024-06-27 19:31:52,473 INFO L420 AbstractCegarLoop]: === Iteration 182 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:31:52,473 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:31:52,473 INFO L85 PathProgramCache]: Analyzing trace with hash -1795928429, now seen corresponding path program 23 times [2024-06-27 19:31:52,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:31:52,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751410240] [2024-06-27 19:31:52,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:31:52,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:31:52,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:31:52,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:31:52,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:31:52,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751410240] [2024-06-27 19:31:52,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751410240] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:31:52,575 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:31:52,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:31:52,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493985239] [2024-06-27 19:31:52,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:31:52,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:31:52,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:31:52,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:31:52,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:31:52,653 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:31:52,653 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 416 places, 491 transitions, 7437 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:31:52,653 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:31:52,653 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:31:52,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:31:54,419 INFO L124 PetriNetUnfolderBase]: 4065/6866 cut-off events. [2024-06-27 19:31:54,419 INFO L125 PetriNetUnfolderBase]: For 1719148/1719152 co-relation queries the response was YES. [2024-06-27 19:31:54,480 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64425 conditions, 6866 events. 4065/6866 cut-off events. For 1719148/1719152 co-relation queries the response was YES. Maximal size of possible extension queue 495. Compared 47933 event pairs, 1221 based on Foata normal form. 35/6895 useless extension candidates. Maximal degree in co-relation 64220. Up to 5977 conditions per place. [2024-06-27 19:31:54,504 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 417 selfloop transitions, 85 changer transitions 15/524 dead transitions. [2024-06-27 19:31:54,504 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 422 places, 524 transitions, 8601 flow [2024-06-27 19:31:54,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:31:54,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:31:54,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 229 transitions. [2024-06-27 19:31:54,505 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5725 [2024-06-27 19:31:54,505 INFO L175 Difference]: Start difference. First operand has 416 places, 491 transitions, 7437 flow. Second operand 10 states and 229 transitions. [2024-06-27 19:31:54,505 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 422 places, 524 transitions, 8601 flow Killed by 15