./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe030_tso.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2024-06-19_11-23-25.files/protection/safe030_tso.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7724a2de Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe030_tso.i ./goblint.2024-06-19_11-23-25.files/protection/safe030_tso.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-27 17:56:51,860 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 17:56:51,953 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 17:56:51,959 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 17:56:51,960 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 17:56:51,996 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 17:56:51,997 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 17:56:51,997 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 17:56:51,997 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 17:56:51,998 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 17:56:51,998 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 17:56:51,999 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 17:56:51,999 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 17:56:52,003 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 17:56:52,004 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 17:56:52,005 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 17:56:52,005 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 17:56:52,006 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 17:56:52,006 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 17:56:52,006 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 17:56:52,006 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 17:56:52,007 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 17:56:52,007 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 17:56:52,007 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 17:56:52,008 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 17:56:52,008 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 17:56:52,008 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 17:56:52,008 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 17:56:52,009 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 17:56:52,009 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 17:56:52,010 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 17:56:52,010 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 17:56:52,011 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 17:56:52,011 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 17:56:52,012 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 17:56:52,012 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 17:56:52,012 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 17:56:52,012 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 17:56:52,012 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 17:56:52,013 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 17:56:52,013 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 17:56:52,013 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 17:56:52,014 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 17:56:52,014 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-06-27 17:56:52,231 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 17:56:52,257 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 17:56:52,259 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 17:56:52,260 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 17:56:52,261 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 17:56:52,262 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/safe030_tso.yml/witness.yml [2024-06-27 17:56:52,440 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 17:56:52,440 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 17:56:52,442 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe030_tso.i [2024-06-27 17:56:53,552 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 17:56:53,800 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 17:56:53,801 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe030_tso.i [2024-06-27 17:56:53,816 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3c7564e8e/4375bb52a7ee43649529d7357f0c2679/FLAG12ca7c507 [2024-06-27 17:56:53,829 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3c7564e8e/4375bb52a7ee43649529d7357f0c2679 [2024-06-27 17:56:53,829 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 17:56:53,830 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 17:56:53,831 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 17:56:53,831 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 17:56:53,836 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 17:56:53,837 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 05:56:52" (1/2) ... [2024-06-27 17:56:53,838 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@73360e53 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 05:56:53, skipping insertion in model container [2024-06-27 17:56:53,838 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 05:56:52" (1/2) ... [2024-06-27 17:56:53,839 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@3c6c5709 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 05:56:53, skipping insertion in model container [2024-06-27 17:56:53,840 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 05:56:53" (2/2) ... [2024-06-27 17:56:53,840 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@73360e53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:56:53, skipping insertion in model container [2024-06-27 17:56:53,840 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 05:56:53" (2/2) ... [2024-06-27 17:56:53,840 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 17:56:53,882 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 17:56:53,884 INFO L97 edCorrectnessWitness]: Location invariant before [L779-L779] (((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || ((z == 0 || z == 1) || z == 2)) [2024-06-27 17:56:53,884 INFO L97 edCorrectnessWitness]: Location invariant before [L780-L780] (((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || ((z == 0 || z == 1) || z == 2)) [2024-06-27 17:56:53,884 INFO L97 edCorrectnessWitness]: Location invariant before [L777-L777] (((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || ((z == 0 || z == 1) || z == 2)) [2024-06-27 17:56:53,884 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 17:56:53,884 INFO L106 edCorrectnessWitness]: ghost_update [L775-L775] multithreaded = 1; [2024-06-27 17:56:53,926 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 17:56:54,103 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe030_tso.i[945,958] [2024-06-27 17:56:54,245 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 17:56:54,254 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local [2024-06-27 17:56:54,288 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe030_tso.i[945,958] Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-27 17:56:54,354 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 17:56:54,405 INFO L206 MainTranslator]: Completed translation [2024-06-27 17:56:54,405 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:56:54 WrapperNode [2024-06-27 17:56:54,405 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 17:56:54,407 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 17:56:54,407 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 17:56:54,407 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 17:56:54,414 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:56:54" (1/1) ... [2024-06-27 17:56:54,442 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:56:54" (1/1) ... [2024-06-27 17:56:54,476 INFO L138 Inliner]: procedures = 175, calls = 41, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 62 [2024-06-27 17:56:54,477 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 17:56:54,478 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 17:56:54,478 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 17:56:54,479 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 17:56:54,488 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:56:54" (1/1) ... [2024-06-27 17:56:54,488 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:56:54" (1/1) ... [2024-06-27 17:56:54,501 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:56:54" (1/1) ... [2024-06-27 17:56:54,522 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-27 17:56:54,524 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:56:54" (1/1) ... [2024-06-27 17:56:54,524 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:56:54" (1/1) ... [2024-06-27 17:56:54,537 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:56:54" (1/1) ... [2024-06-27 17:56:54,542 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:56:54" (1/1) ... [2024-06-27 17:56:54,544 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:56:54" (1/1) ... [2024-06-27 17:56:54,550 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:56:54" (1/1) ... [2024-06-27 17:56:54,552 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 17:56:54,558 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 17:56:54,558 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 17:56:54,558 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 17:56:54,559 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:56:54" (1/1) ... [2024-06-27 17:56:54,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 17:56:54,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:56:54,589 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-27 17:56:54,617 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-27 17:56:54,634 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 17:56:54,634 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 17:56:54,634 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-27 17:56:54,634 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-27 17:56:54,634 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-27 17:56:54,635 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-27 17:56:54,635 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-27 17:56:54,635 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-27 17:56:54,635 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 17:56:54,635 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 17:56:54,635 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 17:56:54,635 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 17:56:54,637 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-27 17:56:54,744 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 17:56:54,746 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 17:56:54,908 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 17:56:54,909 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 17:56:55,030 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 17:56:55,030 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-27 17:56:55,030 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 05:56:55 BoogieIcfgContainer [2024-06-27 17:56:55,031 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 17:56:55,033 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 17:56:55,037 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 17:56:55,040 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 17:56:55,040 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 05:56:52" (1/4) ... [2024-06-27 17:56:55,041 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10ebf407 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 05:56:55, skipping insertion in model container [2024-06-27 17:56:55,042 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 05:56:53" (2/4) ... [2024-06-27 17:56:55,043 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10ebf407 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 05:56:55, skipping insertion in model container [2024-06-27 17:56:55,043 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:56:54" (3/4) ... [2024-06-27 17:56:55,043 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10ebf407 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 05:56:55, skipping insertion in model container [2024-06-27 17:56:55,043 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 05:56:55" (4/4) ... [2024-06-27 17:56:55,045 INFO L112 eAbstractionObserver]: Analyzing ICFG safe030_tso.i [2024-06-27 17:56:55,062 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 17:56:55,063 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-27 17:56:55,063 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 17:56:55,125 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 17:56:55,155 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 54 places, 45 transitions, 102 flow [2024-06-27 17:56:55,182 INFO L124 PetriNetUnfolderBase]: 1/42 cut-off events. [2024-06-27 17:56:55,182 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 17:56:55,185 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52 conditions, 42 events. 1/42 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 64 event pairs, 0 based on Foata normal form. 0/37 useless extension candidates. Maximal degree in co-relation 43. Up to 2 conditions per place. [2024-06-27 17:56:55,185 INFO L82 GeneralOperation]: Start removeDead. Operand has 54 places, 45 transitions, 102 flow [2024-06-27 17:56:55,188 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 49 places, 39 transitions, 87 flow [2024-06-27 17:56:55,197 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 17:56:55,202 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;@28364706, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 17:56:55,203 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2024-06-27 17:56:55,206 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 17:56:55,206 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-27 17:56:55,207 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 17:56:55,207 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:56:55,208 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-27 17:56:55,208 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:56:55,213 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:56:55,213 INFO L85 PathProgramCache]: Analyzing trace with hash 202549122, now seen corresponding path program 1 times [2024-06-27 17:56:55,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:56:55,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984263087] [2024-06-27 17:56:55,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:56:55,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:56:55,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:56:55,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:56:55,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:56:55,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984263087] [2024-06-27 17:56:55,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984263087] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:56:55,593 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:56:55,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 17:56:55,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454769319] [2024-06-27 17:56:55,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:56:55,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 17:56:55,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:56:55,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 17:56:55,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 17:56:55,684 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:56:55,687 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 39 transitions, 87 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 17:56:55,688 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:56:55,688 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:56:55,689 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:56:56,019 INFO L124 PetriNetUnfolderBase]: 1546/2449 cut-off events. [2024-06-27 17:56:56,020 INFO L125 PetriNetUnfolderBase]: For 29/29 co-relation queries the response was YES. [2024-06-27 17:56:56,028 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4805 conditions, 2449 events. 1546/2449 cut-off events. For 29/29 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 13796 event pairs, 1176 based on Foata normal form. 1/2375 useless extension candidates. Maximal degree in co-relation 4793. Up to 2279 conditions per place. [2024-06-27 17:56:56,046 INFO L140 encePairwiseOnDemand]: 38/45 looper letters, 34 selfloop transitions, 4 changer transitions 0/51 dead transitions. [2024-06-27 17:56:56,046 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 51 transitions, 193 flow [2024-06-27 17:56:56,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 17:56:56,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 17:56:56,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 92 transitions. [2024-06-27 17:56:56,060 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6814814814814815 [2024-06-27 17:56:56,062 INFO L175 Difference]: Start difference. First operand has 49 places, 39 transitions, 87 flow. Second operand 3 states and 92 transitions. [2024-06-27 17:56:56,063 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 51 transitions, 193 flow [2024-06-27 17:56:56,066 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 51 transitions, 188 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-27 17:56:56,072 INFO L231 Difference]: Finished difference. Result has 49 places, 42 transitions, 114 flow [2024-06-27 17:56:56,074 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=114, PETRI_PLACES=49, PETRI_TRANSITIONS=42} [2024-06-27 17:56:56,079 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 0 predicate places. [2024-06-27 17:56:56,079 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 42 transitions, 114 flow [2024-06-27 17:56:56,080 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 17:56:56,080 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:56:56,080 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:56:56,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 17:56:56,081 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:56:56,083 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:56:56,084 INFO L85 PathProgramCache]: Analyzing trace with hash 1376198433, now seen corresponding path program 1 times [2024-06-27 17:56:56,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:56:56,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433159108] [2024-06-27 17:56:56,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:56:56,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:56:56,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:56:56,265 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:56:56,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:56:56,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433159108] [2024-06-27 17:56:56,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433159108] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:56:56,267 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:56:56,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 17:56:56,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730286382] [2024-06-27 17:56:56,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:56:56,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 17:56:56,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:56:56,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 17:56:56,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-27 17:56:56,309 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:56:56,310 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 42 transitions, 114 flow. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:56:56,310 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:56:56,310 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:56:56,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:56:56,656 INFO L124 PetriNetUnfolderBase]: 1540/2709 cut-off events. [2024-06-27 17:56:56,657 INFO L125 PetriNetUnfolderBase]: For 413/413 co-relation queries the response was YES. [2024-06-27 17:56:56,663 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5636 conditions, 2709 events. 1540/2709 cut-off events. For 413/413 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 16440 event pairs, 1008 based on Foata normal form. 3/2656 useless extension candidates. Maximal degree in co-relation 5624. Up to 2251 conditions per place. [2024-06-27 17:56:56,680 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 43 selfloop transitions, 7 changer transitions 0/63 dead transitions. [2024-06-27 17:56:56,680 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 63 transitions, 268 flow [2024-06-27 17:56:56,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 17:56:56,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 17:56:56,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 121 transitions. [2024-06-27 17:56:56,684 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6722222222222223 [2024-06-27 17:56:56,685 INFO L175 Difference]: Start difference. First operand has 49 places, 42 transitions, 114 flow. Second operand 4 states and 121 transitions. [2024-06-27 17:56:56,685 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 63 transitions, 268 flow [2024-06-27 17:56:56,686 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 63 transitions, 264 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 17:56:56,688 INFO L231 Difference]: Finished difference. Result has 52 places, 45 transitions, 150 flow [2024-06-27 17:56:56,688 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=150, PETRI_PLACES=52, PETRI_TRANSITIONS=45} [2024-06-27 17:56:56,689 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 3 predicate places. [2024-06-27 17:56:56,689 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 45 transitions, 150 flow [2024-06-27 17:56:56,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:56:56,690 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:56:56,690 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:56:56,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 17:56:56,691 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:56:56,691 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:56:56,691 INFO L85 PathProgramCache]: Analyzing trace with hash -287520835, now seen corresponding path program 1 times [2024-06-27 17:56:56,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:56:56,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000068767] [2024-06-27 17:56:56,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:56:56,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:56:56,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:56:56,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:56:56,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:56:56,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000068767] [2024-06-27 17:56:56,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000068767] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:56:56,778 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:56:56,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 17:56:56,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487621301] [2024-06-27 17:56:56,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:56:56,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 17:56:56,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:56:56,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 17:56:56,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 17:56:56,813 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:56:56,815 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 45 transitions, 150 flow. Second operand has 5 states, 5 states have (on average 18.2) internal successors, (91), 5 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:56:56,815 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:56:56,815 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:56:56,815 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:56:57,105 INFO L124 PetriNetUnfolderBase]: 1554/2529 cut-off events. [2024-06-27 17:56:57,105 INFO L125 PetriNetUnfolderBase]: For 1171/1171 co-relation queries the response was YES. [2024-06-27 17:56:57,110 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6047 conditions, 2529 events. 1554/2529 cut-off events. For 1171/1171 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 14603 event pairs, 572 based on Foata normal form. 5/2509 useless extension candidates. Maximal degree in co-relation 6033. Up to 2183 conditions per place. [2024-06-27 17:56:57,125 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 58 selfloop transitions, 16 changer transitions 0/87 dead transitions. [2024-06-27 17:56:57,125 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 87 transitions, 430 flow [2024-06-27 17:56:57,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:56:57,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:56:57,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 158 transitions. [2024-06-27 17:56:57,130 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7022222222222222 [2024-06-27 17:56:57,130 INFO L175 Difference]: Start difference. First operand has 52 places, 45 transitions, 150 flow. Second operand 5 states and 158 transitions. [2024-06-27 17:56:57,130 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 87 transitions, 430 flow [2024-06-27 17:56:57,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 87 transitions, 416 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-27 17:56:57,136 INFO L231 Difference]: Finished difference. Result has 57 places, 56 transitions, 249 flow [2024-06-27 17:56:57,136 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=249, PETRI_PLACES=57, PETRI_TRANSITIONS=56} [2024-06-27 17:56:57,137 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 8 predicate places. [2024-06-27 17:56:57,137 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 56 transitions, 249 flow [2024-06-27 17:56:57,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 5 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:56:57,138 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:56:57,138 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:56:57,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 17:56:57,138 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:56:57,139 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:56:57,140 INFO L85 PathProgramCache]: Analyzing trace with hash -571312120, now seen corresponding path program 1 times [2024-06-27 17:56:57,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:56:57,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120703868] [2024-06-27 17:56:57,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:56:57,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:56:57,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:56:57,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:56:57,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:56:57,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120703868] [2024-06-27 17:56:57,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120703868] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:56:57,241 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:56:57,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:56:57,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723024764] [2024-06-27 17:56:57,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:56:57,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:56:57,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:56:57,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:56:57,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:56:57,300 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:56:57,302 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 56 transitions, 249 flow. Second operand has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 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 17:56:57,302 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:56:57,302 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:56:57,302 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:56:57,614 INFO L124 PetriNetUnfolderBase]: 1576/2731 cut-off events. [2024-06-27 17:56:57,614 INFO L125 PetriNetUnfolderBase]: For 2903/2906 co-relation queries the response was YES. [2024-06-27 17:56:57,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7399 conditions, 2731 events. 1576/2731 cut-off events. For 2903/2906 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 16615 event pairs, 555 based on Foata normal form. 12/2694 useless extension candidates. Maximal degree in co-relation 7382. Up to 2149 conditions per place. [2024-06-27 17:56:57,636 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 64 selfloop transitions, 19 changer transitions 0/96 dead transitions. [2024-06-27 17:56:57,637 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 96 transitions, 541 flow [2024-06-27 17:56:57,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:56:57,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:56:57,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 184 transitions. [2024-06-27 17:56:57,639 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6814814814814815 [2024-06-27 17:56:57,639 INFO L175 Difference]: Start difference. First operand has 57 places, 56 transitions, 249 flow. Second operand 6 states and 184 transitions. [2024-06-27 17:56:57,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 96 transitions, 541 flow [2024-06-27 17:56:57,646 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 96 transitions, 533 flow, removed 4 selfloop flow, removed 0 redundant places. [2024-06-27 17:56:57,648 INFO L231 Difference]: Finished difference. Result has 62 places, 58 transitions, 305 flow [2024-06-27 17:56:57,648 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=233, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=305, PETRI_PLACES=62, PETRI_TRANSITIONS=58} [2024-06-27 17:56:57,649 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 13 predicate places. [2024-06-27 17:56:57,650 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 58 transitions, 305 flow [2024-06-27 17:56:57,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 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 17:56:57,650 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:56:57,650 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:56:57,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 17:56:57,651 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:56:57,651 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:56:57,651 INFO L85 PathProgramCache]: Analyzing trace with hash -1813654217, now seen corresponding path program 1 times [2024-06-27 17:56:57,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:56:57,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491748449] [2024-06-27 17:56:57,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:56:57,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:56:57,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:56:57,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:56:57,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:56:57,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491748449] [2024-06-27 17:56:57,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491748449] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:56:57,771 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:56:57,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 17:56:57,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806400653] [2024-06-27 17:56:57,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:56:57,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 17:56:57,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:56:57,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 17:56:57,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-27 17:56:57,793 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:56:57,793 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 58 transitions, 305 flow. Second operand has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:56:57,793 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:56:57,793 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:56:57,794 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:56:58,042 INFO L124 PetriNetUnfolderBase]: 1571/2503 cut-off events. [2024-06-27 17:56:58,042 INFO L125 PetriNetUnfolderBase]: For 4049/4049 co-relation queries the response was YES. [2024-06-27 17:56:58,047 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7792 conditions, 2503 events. 1571/2503 cut-off events. For 4049/4049 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 14153 event pairs, 498 based on Foata normal form. 2/2484 useless extension candidates. Maximal degree in co-relation 7772. Up to 2304 conditions per place. [2024-06-27 17:56:58,063 INFO L140 encePairwiseOnDemand]: 38/45 looper letters, 53 selfloop transitions, 7 changer transitions 0/73 dead transitions. [2024-06-27 17:56:58,064 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 73 transitions, 461 flow [2024-06-27 17:56:58,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 17:56:58,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 17:56:58,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 116 transitions. [2024-06-27 17:56:58,065 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6444444444444445 [2024-06-27 17:56:58,065 INFO L175 Difference]: Start difference. First operand has 62 places, 58 transitions, 305 flow. Second operand 4 states and 116 transitions. [2024-06-27 17:56:58,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 73 transitions, 461 flow [2024-06-27 17:56:58,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 73 transitions, 411 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-27 17:56:58,074 INFO L231 Difference]: Finished difference. Result has 62 places, 58 transitions, 277 flow [2024-06-27 17:56:58,075 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=255, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=277, PETRI_PLACES=62, PETRI_TRANSITIONS=58} [2024-06-27 17:56:58,077 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 13 predicate places. [2024-06-27 17:56:58,077 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 58 transitions, 277 flow [2024-06-27 17:56:58,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:56:58,078 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:56:58,078 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:56:58,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 17:56:58,078 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:56:58,078 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:56:58,079 INFO L85 PathProgramCache]: Analyzing trace with hash -389223331, now seen corresponding path program 1 times [2024-06-27 17:56:58,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:56:58,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072924482] [2024-06-27 17:56:58,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:56:58,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:56:58,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:56:58,185 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 17:56:58,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:56:58,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072924482] [2024-06-27 17:56:58,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072924482] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:56:58,186 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:56:58,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 17:56:58,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350862950] [2024-06-27 17:56:58,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:56:58,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 17:56:58,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:56:58,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 17:56:58,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 17:56:58,212 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:56:58,212 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 58 transitions, 277 flow. Second operand has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:56:58,212 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:56:58,213 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:56:58,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:56:58,473 INFO L124 PetriNetUnfolderBase]: 1579/2532 cut-off events. [2024-06-27 17:56:58,473 INFO L125 PetriNetUnfolderBase]: For 4427/4427 co-relation queries the response was YES. [2024-06-27 17:56:58,478 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7735 conditions, 2532 events. 1579/2532 cut-off events. For 4427/4427 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 14228 event pairs, 473 based on Foata normal form. 3/2533 useless extension candidates. Maximal degree in co-relation 7714. Up to 2265 conditions per place. [2024-06-27 17:56:58,494 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 63 selfloop transitions, 16 changer transitions 0/92 dead transitions. [2024-06-27 17:56:58,494 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 92 transitions, 563 flow [2024-06-27 17:56:58,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:56:58,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:56:58,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 148 transitions. [2024-06-27 17:56:58,496 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6577777777777778 [2024-06-27 17:56:58,496 INFO L175 Difference]: Start difference. First operand has 62 places, 58 transitions, 277 flow. Second operand 5 states and 148 transitions. [2024-06-27 17:56:58,496 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 92 transitions, 563 flow [2024-06-27 17:56:58,500 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 92 transitions, 543 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-27 17:56:58,503 INFO L231 Difference]: Finished difference. Result has 66 places, 69 transitions, 380 flow [2024-06-27 17:56:58,504 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=257, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=380, PETRI_PLACES=66, PETRI_TRANSITIONS=69} [2024-06-27 17:56:58,506 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 17 predicate places. [2024-06-27 17:56:58,506 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 69 transitions, 380 flow [2024-06-27 17:56:58,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:56:58,507 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:56:58,507 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:56:58,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 17:56:58,507 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:56:58,508 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:56:58,508 INFO L85 PathProgramCache]: Analyzing trace with hash 770916584, now seen corresponding path program 1 times [2024-06-27 17:56:58,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:56:58,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429464759] [2024-06-27 17:56:58,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:56:58,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:56:58,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:56:58,595 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:56:58,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:56:58,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429464759] [2024-06-27 17:56:58,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429464759] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:56:58,596 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:56:58,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 17:56:58,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379439415] [2024-06-27 17:56:58,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:56:58,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 17:56:58,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:56:58,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 17:56:58,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 17:56:58,625 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:56:58,626 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 69 transitions, 380 flow. Second operand has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:56:58,626 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:56:58,626 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:56:58,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:56:58,918 INFO L124 PetriNetUnfolderBase]: 1591/2559 cut-off events. [2024-06-27 17:56:58,918 INFO L125 PetriNetUnfolderBase]: For 6638/6644 co-relation queries the response was YES. [2024-06-27 17:56:58,923 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8753 conditions, 2559 events. 1591/2559 cut-off events. For 6638/6644 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 14398 event pairs, 475 based on Foata normal form. 8/2561 useless extension candidates. Maximal degree in co-relation 8730. Up to 2231 conditions per place. [2024-06-27 17:56:58,938 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 67 selfloop transitions, 18 changer transitions 0/98 dead transitions. [2024-06-27 17:56:58,938 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 98 transitions, 658 flow [2024-06-27 17:56:58,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:56:58,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:56:58,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 151 transitions. [2024-06-27 17:56:58,940 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6711111111111111 [2024-06-27 17:56:58,940 INFO L175 Difference]: Start difference. First operand has 66 places, 69 transitions, 380 flow. Second operand 5 states and 151 transitions. [2024-06-27 17:56:58,940 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 98 transitions, 658 flow [2024-06-27 17:56:58,949 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 98 transitions, 644 flow, removed 7 selfloop flow, removed 0 redundant places. [2024-06-27 17:56:58,951 INFO L231 Difference]: Finished difference. Result has 71 places, 72 transitions, 436 flow [2024-06-27 17:56:58,951 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=366, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=436, PETRI_PLACES=71, PETRI_TRANSITIONS=72} [2024-06-27 17:56:58,952 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 22 predicate places. [2024-06-27 17:56:58,953 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 72 transitions, 436 flow [2024-06-27 17:56:58,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:56:58,953 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:56:58,953 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:56:58,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 17:56:58,954 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:56:58,954 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:56:58,955 INFO L85 PathProgramCache]: Analyzing trace with hash 835059350, now seen corresponding path program 2 times [2024-06-27 17:56:58,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:56:58,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068439565] [2024-06-27 17:56:58,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:56:58,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:56:58,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:56:59,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:56:59,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:56:59,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068439565] [2024-06-27 17:56:59,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068439565] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:56:59,055 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:56:59,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 17:56:59,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524960855] [2024-06-27 17:56:59,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:56:59,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 17:56:59,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:56:59,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 17:56:59,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 17:56:59,077 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:56:59,078 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 72 transitions, 436 flow. Second operand has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:56:59,078 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:56:59,078 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:56:59,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:56:59,335 INFO L124 PetriNetUnfolderBase]: 1579/2540 cut-off events. [2024-06-27 17:56:59,335 INFO L125 PetriNetUnfolderBase]: For 7388/7392 co-relation queries the response was YES. [2024-06-27 17:56:59,341 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8834 conditions, 2540 events. 1579/2540 cut-off events. For 7388/7392 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 14301 event pairs, 493 based on Foata normal form. 3/2533 useless extension candidates. Maximal degree in co-relation 8808. Up to 2215 conditions per place. [2024-06-27 17:56:59,355 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 61 selfloop transitions, 19 changer transitions 0/93 dead transitions. [2024-06-27 17:56:59,356 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 93 transitions, 646 flow [2024-06-27 17:56:59,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:56:59,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:56:59,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 147 transitions. [2024-06-27 17:56:59,359 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6533333333333333 [2024-06-27 17:56:59,359 INFO L175 Difference]: Start difference. First operand has 71 places, 72 transitions, 436 flow. Second operand 5 states and 147 transitions. [2024-06-27 17:56:59,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 93 transitions, 646 flow [2024-06-27 17:56:59,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 93 transitions, 619 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-27 17:56:59,372 INFO L231 Difference]: Finished difference. Result has 74 places, 72 transitions, 455 flow [2024-06-27 17:56:59,372 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=409, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=455, PETRI_PLACES=74, PETRI_TRANSITIONS=72} [2024-06-27 17:56:59,374 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 25 predicate places. [2024-06-27 17:56:59,374 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 72 transitions, 455 flow [2024-06-27 17:56:59,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:56:59,374 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:56:59,375 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:56:59,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-27 17:56:59,375 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:56:59,376 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:56:59,376 INFO L85 PathProgramCache]: Analyzing trace with hash 1059048542, now seen corresponding path program 1 times [2024-06-27 17:56:59,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:56:59,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632435282] [2024-06-27 17:56:59,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:56:59,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:56:59,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:56:59,457 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 17:56:59,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:56:59,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632435282] [2024-06-27 17:56:59,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632435282] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:56:59,458 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:56:59,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:56:59,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995925985] [2024-06-27 17:56:59,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:56:59,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:56:59,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:56:59,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:56:59,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:56:59,487 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:56:59,488 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 72 transitions, 455 flow. Second operand has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 6 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:56:59,488 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:56:59,488 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:56:59,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:56:59,798 INFO L124 PetriNetUnfolderBase]: 1833/2997 cut-off events. [2024-06-27 17:56:59,799 INFO L125 PetriNetUnfolderBase]: For 9417/9417 co-relation queries the response was YES. [2024-06-27 17:56:59,807 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10310 conditions, 2997 events. 1833/2997 cut-off events. For 9417/9417 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 17644 event pairs, 466 based on Foata normal form. 8/2981 useless extension candidates. Maximal degree in co-relation 10283. Up to 1997 conditions per place. [2024-06-27 17:56:59,821 INFO L140 encePairwiseOnDemand]: 33/45 looper letters, 85 selfloop transitions, 35 changer transitions 0/133 dead transitions. [2024-06-27 17:56:59,821 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 133 transitions, 993 flow [2024-06-27 17:56:59,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:56:59,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:56:59,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 193 transitions. [2024-06-27 17:56:59,823 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7148148148148148 [2024-06-27 17:56:59,823 INFO L175 Difference]: Start difference. First operand has 74 places, 72 transitions, 455 flow. Second operand 6 states and 193 transitions. [2024-06-27 17:56:59,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 133 transitions, 993 flow [2024-06-27 17:56:59,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 133 transitions, 930 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-27 17:56:59,839 INFO L231 Difference]: Finished difference. Result has 78 places, 93 transitions, 641 flow [2024-06-27 17:56:59,839 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=392, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=641, PETRI_PLACES=78, PETRI_TRANSITIONS=93} [2024-06-27 17:56:59,840 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 29 predicate places. [2024-06-27 17:56:59,840 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 93 transitions, 641 flow [2024-06-27 17:56:59,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 6 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:56:59,841 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:56:59,841 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:56:59,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-27 17:56:59,841 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:56:59,842 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:56:59,842 INFO L85 PathProgramCache]: Analyzing trace with hash 117037562, now seen corresponding path program 2 times [2024-06-27 17:56:59,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:56:59,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170667270] [2024-06-27 17:56:59,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:56:59,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:56:59,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:56:59,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:56:59,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:56:59,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170667270] [2024-06-27 17:56:59,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170667270] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:56:59,939 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:56:59,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:56:59,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561037814] [2024-06-27 17:56:59,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:56:59,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:56:59,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:56:59,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:56:59,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:56:59,976 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:56:59,977 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 93 transitions, 641 flow. Second operand has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 6 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:56:59,977 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:56:59,977 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:56:59,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:00,305 INFO L124 PetriNetUnfolderBase]: 1904/3079 cut-off events. [2024-06-27 17:57:00,305 INFO L125 PetriNetUnfolderBase]: For 14147/14151 co-relation queries the response was YES. [2024-06-27 17:57:00,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12821 conditions, 3079 events. 1904/3079 cut-off events. For 14147/14151 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 18029 event pairs, 482 based on Foata normal form. 5/3066 useless extension candidates. Maximal degree in co-relation 12790. Up to 2044 conditions per place. [2024-06-27 17:57:00,333 INFO L140 encePairwiseOnDemand]: 33/45 looper letters, 87 selfloop transitions, 46 changer transitions 0/146 dead transitions. [2024-06-27 17:57:00,333 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 146 transitions, 1266 flow [2024-06-27 17:57:00,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:57:00,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:57:00,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 189 transitions. [2024-06-27 17:57:00,335 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7 [2024-06-27 17:57:00,335 INFO L175 Difference]: Start difference. First operand has 78 places, 93 transitions, 641 flow. Second operand 6 states and 189 transitions. [2024-06-27 17:57:00,335 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 146 transitions, 1266 flow [2024-06-27 17:57:00,360 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 146 transitions, 1226 flow, removed 20 selfloop flow, removed 0 redundant places. [2024-06-27 17:57:00,362 INFO L231 Difference]: Finished difference. Result has 87 places, 110 transitions, 926 flow [2024-06-27 17:57:00,362 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=609, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=926, PETRI_PLACES=87, PETRI_TRANSITIONS=110} [2024-06-27 17:57:00,363 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 38 predicate places. [2024-06-27 17:57:00,363 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 110 transitions, 926 flow [2024-06-27 17:57:00,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 6 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:00,363 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:00,363 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:00,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-27 17:57:00,364 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:57:00,364 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:00,364 INFO L85 PathProgramCache]: Analyzing trace with hash -1395744334, now seen corresponding path program 3 times [2024-06-27 17:57:00,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:00,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555099768] [2024-06-27 17:57:00,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:00,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:00,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:00,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:00,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:00,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555099768] [2024-06-27 17:57:00,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555099768] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:00,430 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:00,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:57:00,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46707586] [2024-06-27 17:57:00,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:00,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:57:00,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:00,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:57:00,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:57:00,459 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:57:00,460 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 110 transitions, 926 flow. Second operand has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 6 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:00,460 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:00,460 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:57:00,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:00,835 INFO L124 PetriNetUnfolderBase]: 1967/3187 cut-off events. [2024-06-27 17:57:00,836 INFO L125 PetriNetUnfolderBase]: For 19275/19279 co-relation queries the response was YES. [2024-06-27 17:57:00,846 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14819 conditions, 3187 events. 1967/3187 cut-off events. For 19275/19279 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 18857 event pairs, 484 based on Foata normal form. 5/3172 useless extension candidates. Maximal degree in co-relation 14782. Up to 2092 conditions per place. [2024-06-27 17:57:00,864 INFO L140 encePairwiseOnDemand]: 33/45 looper letters, 83 selfloop transitions, 58 changer transitions 0/154 dead transitions. [2024-06-27 17:57:00,864 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 154 transitions, 1512 flow [2024-06-27 17:57:00,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:57:00,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:57:00,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 189 transitions. [2024-06-27 17:57:00,866 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7 [2024-06-27 17:57:00,866 INFO L175 Difference]: Start difference. First operand has 87 places, 110 transitions, 926 flow. Second operand 6 states and 189 transitions. [2024-06-27 17:57:00,866 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 154 transitions, 1512 flow [2024-06-27 17:57:00,905 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 154 transitions, 1480 flow, removed 16 selfloop flow, removed 0 redundant places. [2024-06-27 17:57:00,908 INFO L231 Difference]: Finished difference. Result has 95 places, 121 transitions, 1210 flow [2024-06-27 17:57:00,908 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=896, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1210, PETRI_PLACES=95, PETRI_TRANSITIONS=121} [2024-06-27 17:57:00,909 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 46 predicate places. [2024-06-27 17:57:00,909 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 121 transitions, 1210 flow [2024-06-27 17:57:00,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 6 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:00,909 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:00,909 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:00,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-27 17:57:00,910 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:57:00,910 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:00,910 INFO L85 PathProgramCache]: Analyzing trace with hash -381417700, now seen corresponding path program 1 times [2024-06-27 17:57:00,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:00,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107184647] [2024-06-27 17:57:00,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:00,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:00,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:01,009 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 17:57:01,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:01,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107184647] [2024-06-27 17:57:01,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107184647] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:01,010 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:01,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:57:01,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259920250] [2024-06-27 17:57:01,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:01,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:57:01,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:01,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:57:01,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:57:01,042 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:57:01,043 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 121 transitions, 1210 flow. Second operand has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 6 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:01,043 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:01,043 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:57:01,043 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:01,450 INFO L124 PetriNetUnfolderBase]: 1980/3200 cut-off events. [2024-06-27 17:57:01,450 INFO L125 PetriNetUnfolderBase]: For 22674/22674 co-relation queries the response was YES. [2024-06-27 17:57:01,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16091 conditions, 3200 events. 1980/3200 cut-off events. For 22674/22674 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 18805 event pairs, 429 based on Foata normal form. 6/3203 useless extension candidates. Maximal degree in co-relation 16049. Up to 2771 conditions per place. [2024-06-27 17:57:01,480 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 122 selfloop transitions, 19 changer transitions 0/154 dead transitions. [2024-06-27 17:57:01,480 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 154 transitions, 1638 flow [2024-06-27 17:57:01,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:57:01,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:57:01,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 175 transitions. [2024-06-27 17:57:01,482 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6481481481481481 [2024-06-27 17:57:01,482 INFO L175 Difference]: Start difference. First operand has 95 places, 121 transitions, 1210 flow. Second operand 6 states and 175 transitions. [2024-06-27 17:57:01,482 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 154 transitions, 1638 flow [2024-06-27 17:57:01,525 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 154 transitions, 1558 flow, removed 14 selfloop flow, removed 2 redundant places. [2024-06-27 17:57:01,528 INFO L231 Difference]: Finished difference. Result has 99 places, 124 transitions, 1214 flow [2024-06-27 17:57:01,528 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1130, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1214, PETRI_PLACES=99, PETRI_TRANSITIONS=124} [2024-06-27 17:57:01,529 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 50 predicate places. [2024-06-27 17:57:01,529 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 124 transitions, 1214 flow [2024-06-27 17:57:01,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 6 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:01,529 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:01,529 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:01,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-27 17:57:01,530 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:57:01,530 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:01,530 INFO L85 PathProgramCache]: Analyzing trace with hash 1067316502, now seen corresponding path program 1 times [2024-06-27 17:57:01,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:01,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668223642] [2024-06-27 17:57:01,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:01,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:01,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:01,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:01,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:01,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668223642] [2024-06-27 17:57:01,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668223642] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:01,586 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:01,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 17:57:01,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523064171] [2024-06-27 17:57:01,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:01,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 17:57:01,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:01,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 17:57:01,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-27 17:57:01,602 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:57:01,603 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 124 transitions, 1214 flow. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 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 17:57:01,603 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:01,603 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:57:01,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:01,965 INFO L124 PetriNetUnfolderBase]: 1977/3160 cut-off events. [2024-06-27 17:57:01,965 INFO L125 PetriNetUnfolderBase]: For 22695/22695 co-relation queries the response was YES. [2024-06-27 17:57:01,978 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15841 conditions, 3160 events. 1977/3160 cut-off events. For 22695/22695 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 18345 event pairs, 440 based on Foata normal form. 1/3157 useless extension candidates. Maximal degree in co-relation 15798. Up to 2865 conditions per place. [2024-06-27 17:57:01,999 INFO L140 encePairwiseOnDemand]: 39/45 looper letters, 116 selfloop transitions, 7 changer transitions 0/136 dead transitions. [2024-06-27 17:57:01,999 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 136 transitions, 1488 flow [2024-06-27 17:57:02,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 17:57:02,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 17:57:02,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 112 transitions. [2024-06-27 17:57:02,001 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6222222222222222 [2024-06-27 17:57:02,001 INFO L175 Difference]: Start difference. First operand has 99 places, 124 transitions, 1214 flow. Second operand 4 states and 112 transitions. [2024-06-27 17:57:02,001 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 136 transitions, 1488 flow [2024-06-27 17:57:02,052 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 136 transitions, 1422 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-27 17:57:02,055 INFO L231 Difference]: Finished difference. Result has 99 places, 124 transitions, 1168 flow [2024-06-27 17:57:02,055 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1148, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1168, PETRI_PLACES=99, PETRI_TRANSITIONS=124} [2024-06-27 17:57:02,056 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 50 predicate places. [2024-06-27 17:57:02,056 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 124 transitions, 1168 flow [2024-06-27 17:57:02,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 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 17:57:02,056 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:02,056 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:02,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-27 17:57:02,057 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:57:02,057 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:02,057 INFO L85 PathProgramCache]: Analyzing trace with hash 854018702, now seen corresponding path program 1 times [2024-06-27 17:57:02,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:02,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371387456] [2024-06-27 17:57:02,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:02,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:02,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:02,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:02,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:02,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371387456] [2024-06-27 17:57:02,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371387456] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:02,126 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:02,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:57:02,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788929722] [2024-06-27 17:57:02,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:02,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:57:02,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:02,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:57:02,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:57:02,164 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:57:02,164 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 124 transitions, 1168 flow. Second operand has 6 states, 6 states have (on average 18.833333333333332) internal successors, (113), 6 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 17:57:02,165 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:02,165 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:57:02,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:02,575 INFO L124 PetriNetUnfolderBase]: 2020/3275 cut-off events. [2024-06-27 17:57:02,575 INFO L125 PetriNetUnfolderBase]: For 24846/24846 co-relation queries the response was YES. [2024-06-27 17:57:02,584 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16113 conditions, 3275 events. 2020/3275 cut-off events. For 24846/24846 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 19410 event pairs, 463 based on Foata normal form. 4/3253 useless extension candidates. Maximal degree in co-relation 16069. Up to 2150 conditions per place. [2024-06-27 17:57:02,600 INFO L140 encePairwiseOnDemand]: 33/45 looper letters, 97 selfloop transitions, 63 changer transitions 0/173 dead transitions. [2024-06-27 17:57:02,600 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 173 transitions, 1824 flow [2024-06-27 17:57:02,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:57:02,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:57:02,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 195 transitions. [2024-06-27 17:57:02,602 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7222222222222222 [2024-06-27 17:57:02,602 INFO L175 Difference]: Start difference. First operand has 99 places, 124 transitions, 1168 flow. Second operand 6 states and 195 transitions. [2024-06-27 17:57:02,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 173 transitions, 1824 flow [2024-06-27 17:57:02,647 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 173 transitions, 1802 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-27 17:57:02,650 INFO L231 Difference]: Finished difference. Result has 104 places, 134 transitions, 1463 flow [2024-06-27 17:57:02,650 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1146, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1463, PETRI_PLACES=104, PETRI_TRANSITIONS=134} [2024-06-27 17:57:02,650 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 55 predicate places. [2024-06-27 17:57:02,650 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 134 transitions, 1463 flow [2024-06-27 17:57:02,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.833333333333332) internal successors, (113), 6 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 17:57:02,651 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:02,651 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:02,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-27 17:57:02,651 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:57:02,652 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:02,652 INFO L85 PathProgramCache]: Analyzing trace with hash -801286948, now seen corresponding path program 2 times [2024-06-27 17:57:02,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:02,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187975306] [2024-06-27 17:57:02,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:02,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:02,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:02,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:02,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:02,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187975306] [2024-06-27 17:57:02,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187975306] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:02,713 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:02,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:57:02,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961309625] [2024-06-27 17:57:02,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:02,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:57:02,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:02,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:57:02,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:57:02,757 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:57:02,758 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 134 transitions, 1463 flow. Second operand has 6 states, 6 states have (on average 18.833333333333332) internal successors, (113), 6 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 17:57:02,758 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:02,758 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:57:02,758 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:03,163 INFO L124 PetriNetUnfolderBase]: 2063/3378 cut-off events. [2024-06-27 17:57:03,163 INFO L125 PetriNetUnfolderBase]: For 31350/31350 co-relation queries the response was YES. [2024-06-27 17:57:03,178 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18153 conditions, 3378 events. 2063/3378 cut-off events. For 31350/31350 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 20336 event pairs, 485 based on Foata normal form. 4/3348 useless extension candidates. Maximal degree in co-relation 18107. Up to 2189 conditions per place. [2024-06-27 17:57:03,198 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 96 selfloop transitions, 65 changer transitions 0/174 dead transitions. [2024-06-27 17:57:03,198 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 174 transitions, 2049 flow [2024-06-27 17:57:03,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:57:03,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:57:03,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 190 transitions. [2024-06-27 17:57:03,200 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7037037037037037 [2024-06-27 17:57:03,200 INFO L175 Difference]: Start difference. First operand has 104 places, 134 transitions, 1463 flow. Second operand 6 states and 190 transitions. [2024-06-27 17:57:03,200 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 174 transitions, 2049 flow [2024-06-27 17:57:03,260 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 174 transitions, 1952 flow, removed 16 selfloop flow, removed 2 redundant places. [2024-06-27 17:57:03,263 INFO L231 Difference]: Finished difference. Result has 108 places, 139 transitions, 1577 flow [2024-06-27 17:57:03,264 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1372, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1577, PETRI_PLACES=108, PETRI_TRANSITIONS=139} [2024-06-27 17:57:03,264 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 59 predicate places. [2024-06-27 17:57:03,264 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 139 transitions, 1577 flow [2024-06-27 17:57:03,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.833333333333332) internal successors, (113), 6 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 17:57:03,265 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:03,265 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:03,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-27 17:57:03,265 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:57:03,266 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:03,266 INFO L85 PathProgramCache]: Analyzing trace with hash 180301248, now seen corresponding path program 3 times [2024-06-27 17:57:03,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:03,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264608142] [2024-06-27 17:57:03,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:03,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:03,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:03,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:03,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:03,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264608142] [2024-06-27 17:57:03,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264608142] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:03,329 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:03,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:57:03,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014984802] [2024-06-27 17:57:03,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:03,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:57:03,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:03,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:57:03,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:57:03,366 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:57:03,367 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 139 transitions, 1577 flow. Second operand has 6 states, 6 states have (on average 18.833333333333332) internal successors, (113), 6 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 17:57:03,367 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:03,367 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:57:03,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:03,745 INFO L124 PetriNetUnfolderBase]: 2098/3454 cut-off events. [2024-06-27 17:57:03,745 INFO L125 PetriNetUnfolderBase]: For 35885/35897 co-relation queries the response was YES. [2024-06-27 17:57:03,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18824 conditions, 3454 events. 2098/3454 cut-off events. For 35885/35897 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 21120 event pairs, 554 based on Foata normal form. 10/3434 useless extension candidates. Maximal degree in co-relation 18777. Up to 2225 conditions per place. [2024-06-27 17:57:03,779 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 100 selfloop transitions, 64 changer transitions 0/177 dead transitions. [2024-06-27 17:57:03,779 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 177 transitions, 2153 flow [2024-06-27 17:57:03,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:57:03,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:57:03,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 184 transitions. [2024-06-27 17:57:03,781 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6814814814814815 [2024-06-27 17:57:03,781 INFO L175 Difference]: Start difference. First operand has 108 places, 139 transitions, 1577 flow. Second operand 6 states and 184 transitions. [2024-06-27 17:57:03,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 177 transitions, 2153 flow [2024-06-27 17:57:03,854 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 177 transitions, 2034 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-27 17:57:03,857 INFO L231 Difference]: Finished difference. Result has 112 places, 148 transitions, 1758 flow [2024-06-27 17:57:03,858 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1468, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1758, PETRI_PLACES=112, PETRI_TRANSITIONS=148} [2024-06-27 17:57:03,858 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 63 predicate places. [2024-06-27 17:57:03,858 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 148 transitions, 1758 flow [2024-06-27 17:57:03,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.833333333333332) internal successors, (113), 6 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 17:57:03,858 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:03,859 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:03,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-27 17:57:03,859 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:57:03,859 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:03,859 INFO L85 PathProgramCache]: Analyzing trace with hash -1272924982, now seen corresponding path program 1 times [2024-06-27 17:57:03,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:03,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197675530] [2024-06-27 17:57:03,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:03,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:03,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:03,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:03,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:03,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197675530] [2024-06-27 17:57:03,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197675530] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:03,920 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:03,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 17:57:03,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247970421] [2024-06-27 17:57:03,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:03,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 17:57:03,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:03,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 17:57:03,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 17:57:03,952 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:57:03,953 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 148 transitions, 1758 flow. Second operand has 5 states, 5 states have (on average 19.4) internal successors, (97), 5 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 17:57:03,953 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:03,953 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:57:03,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:04,323 INFO L124 PetriNetUnfolderBase]: 2094/3411 cut-off events. [2024-06-27 17:57:04,323 INFO L125 PetriNetUnfolderBase]: For 38097/38106 co-relation queries the response was YES. [2024-06-27 17:57:04,337 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19386 conditions, 3411 events. 2094/3411 cut-off events. For 38097/38106 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 20402 event pairs, 743 based on Foata normal form. 10/3397 useless extension candidates. Maximal degree in co-relation 19337. Up to 2974 conditions per place. [2024-06-27 17:57:04,357 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 137 selfloop transitions, 16 changer transitions 0/166 dead transitions. [2024-06-27 17:57:04,357 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 166 transitions, 2163 flow [2024-06-27 17:57:04,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:57:04,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:57:04,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 140 transitions. [2024-06-27 17:57:04,359 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6222222222222222 [2024-06-27 17:57:04,359 INFO L175 Difference]: Start difference. First operand has 112 places, 148 transitions, 1758 flow. Second operand 5 states and 140 transitions. [2024-06-27 17:57:04,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 166 transitions, 2163 flow [2024-06-27 17:57:04,443 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 166 transitions, 2085 flow, removed 14 selfloop flow, removed 2 redundant places. [2024-06-27 17:57:04,445 INFO L231 Difference]: Finished difference. Result has 115 places, 150 transitions, 1755 flow [2024-06-27 17:57:04,446 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1681, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1755, PETRI_PLACES=115, PETRI_TRANSITIONS=150} [2024-06-27 17:57:04,446 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 66 predicate places. [2024-06-27 17:57:04,446 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 150 transitions, 1755 flow [2024-06-27 17:57:04,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.4) internal successors, (97), 5 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 17:57:04,446 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:04,447 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:04,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-27 17:57:04,447 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:57:04,447 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:04,447 INFO L85 PathProgramCache]: Analyzing trace with hash -1995849601, now seen corresponding path program 1 times [2024-06-27 17:57:04,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:04,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232597925] [2024-06-27 17:57:04,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:04,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:04,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:04,518 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 17:57:04,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:04,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232597925] [2024-06-27 17:57:04,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232597925] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:04,519 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:04,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:57:04,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10459577] [2024-06-27 17:57:04,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:04,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:57:04,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:04,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:57:04,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:57:04,568 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:57:04,569 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 150 transitions, 1755 flow. Second operand has 6 states, 6 states have (on average 18.833333333333332) internal successors, (113), 6 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 17:57:04,569 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:04,569 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:57:04,569 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:04,984 INFO L124 PetriNetUnfolderBase]: 2121/3514 cut-off events. [2024-06-27 17:57:04,984 INFO L125 PetriNetUnfolderBase]: For 40980/40986 co-relation queries the response was YES. [2024-06-27 17:57:04,994 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19289 conditions, 3514 events. 2121/3514 cut-off events. For 40980/40986 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 21482 event pairs, 527 based on Foata normal form. 8/3483 useless extension candidates. Maximal degree in co-relation 19238. Up to 2837 conditions per place. [2024-06-27 17:57:05,011 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 153 selfloop transitions, 22 changer transitions 0/188 dead transitions. [2024-06-27 17:57:05,011 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 188 transitions, 2329 flow [2024-06-27 17:57:05,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:57:05,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:57:05,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 177 transitions. [2024-06-27 17:57:05,013 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6555555555555556 [2024-06-27 17:57:05,013 INFO L175 Difference]: Start difference. First operand has 115 places, 150 transitions, 1755 flow. Second operand 6 states and 177 transitions. [2024-06-27 17:57:05,013 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 188 transitions, 2329 flow [2024-06-27 17:57:05,107 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 188 transitions, 2233 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-06-27 17:57:05,110 INFO L231 Difference]: Finished difference. Result has 118 places, 154 transitions, 1794 flow [2024-06-27 17:57:05,110 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1659, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1794, PETRI_PLACES=118, PETRI_TRANSITIONS=154} [2024-06-27 17:57:05,111 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 69 predicate places. [2024-06-27 17:57:05,111 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 154 transitions, 1794 flow [2024-06-27 17:57:05,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.833333333333332) internal successors, (113), 6 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 17:57:05,112 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:05,112 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:05,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-27 17:57:05,112 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:57:05,113 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:05,113 INFO L85 PathProgramCache]: Analyzing trace with hash 88985335, now seen corresponding path program 2 times [2024-06-27 17:57:05,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:05,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522187808] [2024-06-27 17:57:05,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:05,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:05,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:05,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:05,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:05,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522187808] [2024-06-27 17:57:05,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522187808] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:05,197 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:05,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:57:05,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856001571] [2024-06-27 17:57:05,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:05,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:57:05,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:05,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:57:05,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:57:05,225 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:57:05,226 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 154 transitions, 1794 flow. Second operand has 6 states, 6 states have (on average 18.833333333333332) internal successors, (113), 6 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 17:57:05,226 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:05,226 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:57:05,226 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:05,584 INFO L124 PetriNetUnfolderBase]: 2113/3398 cut-off events. [2024-06-27 17:57:05,584 INFO L125 PetriNetUnfolderBase]: For 42122/42128 co-relation queries the response was YES. [2024-06-27 17:57:05,594 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18958 conditions, 3398 events. 2113/3398 cut-off events. For 42122/42128 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 20162 event pairs, 387 based on Foata normal form. 8/3401 useless extension candidates. Maximal degree in co-relation 18907. Up to 2928 conditions per place. [2024-06-27 17:57:05,626 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 152 selfloop transitions, 20 changer transitions 0/185 dead transitions. [2024-06-27 17:57:05,626 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 185 transitions, 2212 flow [2024-06-27 17:57:05,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:57:05,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:57:05,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 175 transitions. [2024-06-27 17:57:05,628 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6481481481481481 [2024-06-27 17:57:05,628 INFO L175 Difference]: Start difference. First operand has 118 places, 154 transitions, 1794 flow. Second operand 6 states and 175 transitions. [2024-06-27 17:57:05,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 185 transitions, 2212 flow [2024-06-27 17:57:05,741 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 185 transitions, 2091 flow, removed 34 selfloop flow, removed 3 redundant places. [2024-06-27 17:57:05,745 INFO L231 Difference]: Finished difference. Result has 121 places, 154 transitions, 1720 flow [2024-06-27 17:57:05,745 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1673, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1720, PETRI_PLACES=121, PETRI_TRANSITIONS=154} [2024-06-27 17:57:05,745 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 72 predicate places. [2024-06-27 17:57:05,746 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 154 transitions, 1720 flow [2024-06-27 17:57:05,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.833333333333332) internal successors, (113), 6 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 17:57:05,746 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:05,746 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:05,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-27 17:57:05,746 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:57:05,747 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:05,747 INFO L85 PathProgramCache]: Analyzing trace with hash 93638683, now seen corresponding path program 1 times [2024-06-27 17:57:05,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:05,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303529145] [2024-06-27 17:57:05,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:05,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:05,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:05,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:05,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:05,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303529145] [2024-06-27 17:57:05,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303529145] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:05,861 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:05,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:57:05,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960020799] [2024-06-27 17:57:05,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:05,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:57:05,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:05,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:57:05,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:57:05,902 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:57:05,903 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 154 transitions, 1720 flow. Second operand has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:05,903 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:05,903 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:57:05,903 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:06,397 INFO L124 PetriNetUnfolderBase]: 2606/4255 cut-off events. [2024-06-27 17:57:06,397 INFO L125 PetriNetUnfolderBase]: For 60235/60235 co-relation queries the response was YES. [2024-06-27 17:57:06,410 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21516 conditions, 4255 events. 2606/4255 cut-off events. For 60235/60235 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 26698 event pairs, 561 based on Foata normal form. 64/4283 useless extension candidates. Maximal degree in co-relation 21464. Up to 2346 conditions per place. [2024-06-27 17:57:06,431 INFO L140 encePairwiseOnDemand]: 33/45 looper letters, 115 selfloop transitions, 74 changer transitions 0/202 dead transitions. [2024-06-27 17:57:06,432 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 202 transitions, 2372 flow [2024-06-27 17:57:06,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:57:06,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:57:06,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 224 transitions. [2024-06-27 17:57:06,434 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7111111111111111 [2024-06-27 17:57:06,434 INFO L175 Difference]: Start difference. First operand has 121 places, 154 transitions, 1720 flow. Second operand 7 states and 224 transitions. [2024-06-27 17:57:06,435 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 202 transitions, 2372 flow [2024-06-27 17:57:06,546 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 202 transitions, 2324 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-27 17:57:06,549 INFO L231 Difference]: Finished difference. Result has 123 places, 157 transitions, 1882 flow [2024-06-27 17:57:06,550 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1672, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1882, PETRI_PLACES=123, PETRI_TRANSITIONS=157} [2024-06-27 17:57:06,550 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 74 predicate places. [2024-06-27 17:57:06,550 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 157 transitions, 1882 flow [2024-06-27 17:57:06,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:06,550 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:06,551 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:06,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-27 17:57:06,551 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:57:06,551 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:06,551 INFO L85 PathProgramCache]: Analyzing trace with hash 640839279, now seen corresponding path program 1 times [2024-06-27 17:57:06,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:06,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960825880] [2024-06-27 17:57:06,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:06,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:06,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:06,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:06,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:06,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960825880] [2024-06-27 17:57:06,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960825880] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:06,624 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:06,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 17:57:06,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228203600] [2024-06-27 17:57:06,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:06,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 17:57:06,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:06,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 17:57:06,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 17:57:06,654 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:57:06,654 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 157 transitions, 1882 flow. Second operand has 5 states, 5 states have (on average 19.4) internal successors, (97), 5 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 17:57:06,654 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:06,654 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:57:06,654 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:07,078 INFO L124 PetriNetUnfolderBase]: 2617/4199 cut-off events. [2024-06-27 17:57:07,079 INFO L125 PetriNetUnfolderBase]: For 53444/53444 co-relation queries the response was YES. [2024-06-27 17:57:07,093 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22804 conditions, 4199 events. 2617/4199 cut-off events. For 53444/53444 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 25701 event pairs, 506 based on Foata normal form. 1/4195 useless extension candidates. Maximal degree in co-relation 22751. Up to 3794 conditions per place. [2024-06-27 17:57:07,110 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 150 selfloop transitions, 19 changer transitions 0/182 dead transitions. [2024-06-27 17:57:07,111 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 182 transitions, 2357 flow [2024-06-27 17:57:07,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:57:07,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:57:07,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 147 transitions. [2024-06-27 17:57:07,112 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6533333333333333 [2024-06-27 17:57:07,112 INFO L175 Difference]: Start difference. First operand has 123 places, 157 transitions, 1882 flow. Second operand 5 states and 147 transitions. [2024-06-27 17:57:07,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 182 transitions, 2357 flow [2024-06-27 17:57:07,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 182 transitions, 2177 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-27 17:57:07,257 INFO L231 Difference]: Finished difference. Result has 123 places, 160 transitions, 1791 flow [2024-06-27 17:57:07,257 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1706, PETRI_DIFFERENCE_MINUEND_PLACES=118, 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=5, PETRI_FLOW=1791, PETRI_PLACES=123, PETRI_TRANSITIONS=160} [2024-06-27 17:57:07,258 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 74 predicate places. [2024-06-27 17:57:07,258 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 160 transitions, 1791 flow [2024-06-27 17:57:07,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.4) internal successors, (97), 5 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 17:57:07,258 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:07,259 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:07,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-27 17:57:07,259 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:57:07,259 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:07,259 INFO L85 PathProgramCache]: Analyzing trace with hash -1481662437, now seen corresponding path program 2 times [2024-06-27 17:57:07,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:07,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101210560] [2024-06-27 17:57:07,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:07,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:07,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:07,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:07,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:07,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101210560] [2024-06-27 17:57:07,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101210560] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:07,335 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:07,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:57:07,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189763503] [2024-06-27 17:57:07,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:07,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:57:07,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:07,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:57:07,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:57:07,371 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:57:07,371 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 160 transitions, 1791 flow. Second operand has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:07,371 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:07,372 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:57:07,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:07,905 INFO L124 PetriNetUnfolderBase]: 2739/4436 cut-off events. [2024-06-27 17:57:07,905 INFO L125 PetriNetUnfolderBase]: For 55842/55846 co-relation queries the response was YES. [2024-06-27 17:57:07,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22310 conditions, 4436 events. 2739/4436 cut-off events. For 55842/55846 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 27637 event pairs, 618 based on Foata normal form. 15/4417 useless extension candidates. Maximal degree in co-relation 22256. Up to 3096 conditions per place. [2024-06-27 17:57:07,934 INFO L140 encePairwiseOnDemand]: 33/45 looper letters, 115 selfloop transitions, 75 changer transitions 0/203 dead transitions. [2024-06-27 17:57:07,934 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 203 transitions, 2447 flow [2024-06-27 17:57:07,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:57:07,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:57:07,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 217 transitions. [2024-06-27 17:57:07,935 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6888888888888889 [2024-06-27 17:57:07,935 INFO L175 Difference]: Start difference. First operand has 123 places, 160 transitions, 1791 flow. Second operand 7 states and 217 transitions. [2024-06-27 17:57:07,936 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 203 transitions, 2447 flow [2024-06-27 17:57:08,009 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 203 transitions, 2325 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-27 17:57:08,012 INFO L231 Difference]: Finished difference. Result has 126 places, 163 transitions, 1886 flow [2024-06-27 17:57:08,012 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1669, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1886, PETRI_PLACES=126, PETRI_TRANSITIONS=163} [2024-06-27 17:57:08,013 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 77 predicate places. [2024-06-27 17:57:08,013 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 163 transitions, 1886 flow [2024-06-27 17:57:08,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:08,013 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:08,013 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:08,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-27 17:57:08,014 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:57:08,014 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:08,014 INFO L85 PathProgramCache]: Analyzing trace with hash -1253761287, now seen corresponding path program 3 times [2024-06-27 17:57:08,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:08,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552245166] [2024-06-27 17:57:08,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:08,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:08,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:08,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:08,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:08,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552245166] [2024-06-27 17:57:08,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552245166] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:08,093 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:08,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:57:08,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506281986] [2024-06-27 17:57:08,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:08,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:57:08,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:08,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:57:08,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:57:08,153 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:57:08,154 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 163 transitions, 1886 flow. Second operand has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:08,154 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:08,154 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:57:08,155 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:08,715 INFO L124 PetriNetUnfolderBase]: 2861/4620 cut-off events. [2024-06-27 17:57:08,715 INFO L125 PetriNetUnfolderBase]: For 62369/62373 co-relation queries the response was YES. [2024-06-27 17:57:08,729 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24279 conditions, 4620 events. 2861/4620 cut-off events. For 62369/62373 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 28985 event pairs, 614 based on Foata normal form. 15/4606 useless extension candidates. Maximal degree in co-relation 24224. Up to 3282 conditions per place. [2024-06-27 17:57:08,745 INFO L140 encePairwiseOnDemand]: 33/45 looper letters, 115 selfloop transitions, 78 changer transitions 0/206 dead transitions. [2024-06-27 17:57:08,746 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 206 transitions, 2560 flow [2024-06-27 17:57:08,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:57:08,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:57:08,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 218 transitions. [2024-06-27 17:57:08,747 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.692063492063492 [2024-06-27 17:57:08,747 INFO L175 Difference]: Start difference. First operand has 126 places, 163 transitions, 1886 flow. Second operand 7 states and 218 transitions. [2024-06-27 17:57:08,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 206 transitions, 2560 flow [2024-06-27 17:57:08,904 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 206 transitions, 2373 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-27 17:57:08,906 INFO L231 Difference]: Finished difference. Result has 128 places, 166 transitions, 1928 flow [2024-06-27 17:57:08,907 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1699, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1928, PETRI_PLACES=128, PETRI_TRANSITIONS=166} [2024-06-27 17:57:08,907 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 79 predicate places. [2024-06-27 17:57:08,907 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 166 transitions, 1928 flow [2024-06-27 17:57:08,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:08,907 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:08,907 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:08,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-27 17:57:08,908 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:57:08,908 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:08,908 INFO L85 PathProgramCache]: Analyzing trace with hash -1245190407, now seen corresponding path program 4 times [2024-06-27 17:57:08,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:08,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794277152] [2024-06-27 17:57:08,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:08,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:08,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:08,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:08,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:08,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794277152] [2024-06-27 17:57:08,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794277152] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:08,984 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:08,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:57:08,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272900510] [2024-06-27 17:57:08,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:08,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:57:08,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:08,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:57:08,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:57:09,020 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:57:09,021 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 166 transitions, 1928 flow. Second operand has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:09,021 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:09,021 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:57:09,021 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:09,590 INFO L124 PetriNetUnfolderBase]: 3341/5437 cut-off events. [2024-06-27 17:57:09,590 INFO L125 PetriNetUnfolderBase]: For 78346/78350 co-relation queries the response was YES. [2024-06-27 17:57:09,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27833 conditions, 5437 events. 3341/5437 cut-off events. For 78346/78350 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 35759 event pairs, 699 based on Foata normal form. 15/5422 useless extension candidates. Maximal degree in co-relation 27777. Up to 2344 conditions per place. [2024-06-27 17:57:09,629 INFO L140 encePairwiseOnDemand]: 33/45 looper letters, 120 selfloop transitions, 85 changer transitions 0/218 dead transitions. [2024-06-27 17:57:09,630 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 218 transitions, 2734 flow [2024-06-27 17:57:09,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:57:09,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:57:09,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 224 transitions. [2024-06-27 17:57:09,632 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7111111111111111 [2024-06-27 17:57:09,632 INFO L175 Difference]: Start difference. First operand has 128 places, 166 transitions, 1928 flow. Second operand 7 states and 224 transitions. [2024-06-27 17:57:09,632 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 218 transitions, 2734 flow [2024-06-27 17:57:09,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 218 transitions, 2535 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-27 17:57:09,861 INFO L231 Difference]: Finished difference. Result has 131 places, 171 transitions, 2028 flow [2024-06-27 17:57:09,861 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1729, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2028, PETRI_PLACES=131, PETRI_TRANSITIONS=171} [2024-06-27 17:57:09,862 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 82 predicate places. [2024-06-27 17:57:09,862 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 171 transitions, 2028 flow [2024-06-27 17:57:09,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:09,862 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:09,862 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:09,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-27 17:57:09,863 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:57:09,863 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:09,863 INFO L85 PathProgramCache]: Analyzing trace with hash -805087081, now seen corresponding path program 2 times [2024-06-27 17:57:09,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:09,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573401234] [2024-06-27 17:57:09,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:09,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:09,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:09,925 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 17:57:09,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:09,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573401234] [2024-06-27 17:57:09,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573401234] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:09,926 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:09,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 17:57:09,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442463569] [2024-06-27 17:57:09,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:09,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 17:57:09,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:09,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 17:57:09,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 17:57:09,951 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:57:09,952 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 171 transitions, 2028 flow. Second operand has 5 states, 5 states have (on average 19.4) internal successors, (97), 5 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 17:57:09,952 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:09,952 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:57:09,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:10,664 INFO L124 PetriNetUnfolderBase]: 3333/5428 cut-off events. [2024-06-27 17:57:10,664 INFO L125 PetriNetUnfolderBase]: For 78360/78367 co-relation queries the response was YES. [2024-06-27 17:57:10,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28420 conditions, 5428 events. 3333/5428 cut-off events. For 78360/78367 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 35730 event pairs, 1308 based on Foata normal form. 8/5414 useless extension candidates. Maximal degree in co-relation 28362. Up to 4894 conditions per place. [2024-06-27 17:57:10,707 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 155 selfloop transitions, 18 changer transitions 0/186 dead transitions. [2024-06-27 17:57:10,707 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 186 transitions, 2408 flow [2024-06-27 17:57:10,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:57:10,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:57:10,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 139 transitions. [2024-06-27 17:57:10,708 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6177777777777778 [2024-06-27 17:57:10,708 INFO L175 Difference]: Start difference. First operand has 131 places, 171 transitions, 2028 flow. Second operand 5 states and 139 transitions. [2024-06-27 17:57:10,708 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 186 transitions, 2408 flow [2024-06-27 17:57:10,834 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 186 transitions, 2190 flow, removed 37 selfloop flow, removed 4 redundant places. [2024-06-27 17:57:10,836 INFO L231 Difference]: Finished difference. Result has 132 places, 171 transitions, 1854 flow [2024-06-27 17:57:10,836 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1810, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1854, PETRI_PLACES=132, PETRI_TRANSITIONS=171} [2024-06-27 17:57:10,836 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 83 predicate places. [2024-06-27 17:57:10,836 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 171 transitions, 1854 flow [2024-06-27 17:57:10,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.4) internal successors, (97), 5 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 17:57:10,837 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:10,837 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:10,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-27 17:57:10,837 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:57:10,837 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:10,837 INFO L85 PathProgramCache]: Analyzing trace with hash 1189323865, now seen corresponding path program 1 times [2024-06-27 17:57:10,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:10,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111375214] [2024-06-27 17:57:10,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:10,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:10,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:10,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:10,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:10,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111375214] [2024-06-27 17:57:10,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111375214] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:10,896 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:10,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 17:57:10,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497155886] [2024-06-27 17:57:10,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:10,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 17:57:10,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:10,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 17:57:10,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 17:57:10,920 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:57:10,921 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 171 transitions, 1854 flow. Second operand has 5 states, 5 states have (on average 19.4) internal successors, (97), 5 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 17:57:10,921 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:10,921 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:57:10,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:11,436 INFO L124 PetriNetUnfolderBase]: 3341/5462 cut-off events. [2024-06-27 17:57:11,436 INFO L125 PetriNetUnfolderBase]: For 75090/75090 co-relation queries the response was YES. [2024-06-27 17:57:11,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27124 conditions, 5462 events. 3341/5462 cut-off events. For 75090/75090 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 36269 event pairs, 1326 based on Foata normal form. 2/5443 useless extension candidates. Maximal degree in co-relation 27065. Up to 4903 conditions per place. [2024-06-27 17:57:11,478 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 162 selfloop transitions, 18 changer transitions 0/193 dead transitions. [2024-06-27 17:57:11,478 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 193 transitions, 2346 flow [2024-06-27 17:57:11,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:57:11,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:57:11,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 143 transitions. [2024-06-27 17:57:11,479 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6355555555555555 [2024-06-27 17:57:11,479 INFO L175 Difference]: Start difference. First operand has 132 places, 171 transitions, 1854 flow. Second operand 5 states and 143 transitions. [2024-06-27 17:57:11,479 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 193 transitions, 2346 flow [2024-06-27 17:57:11,584 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 193 transitions, 2294 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-27 17:57:11,587 INFO L231 Difference]: Finished difference. Result has 132 places, 174 transitions, 1886 flow [2024-06-27 17:57:11,587 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1802, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1886, PETRI_PLACES=132, PETRI_TRANSITIONS=174} [2024-06-27 17:57:11,588 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 83 predicate places. [2024-06-27 17:57:11,588 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 174 transitions, 1886 flow [2024-06-27 17:57:11,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.4) internal successors, (97), 5 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 17:57:11,588 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:11,588 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:11,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-27 17:57:11,588 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:57:11,589 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:11,589 INFO L85 PathProgramCache]: Analyzing trace with hash -805974859, now seen corresponding path program 2 times [2024-06-27 17:57:11,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:11,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417261430] [2024-06-27 17:57:11,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:11,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:11,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:11,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:11,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:11,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417261430] [2024-06-27 17:57:11,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417261430] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:11,645 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:11,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 17:57:11,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117389369] [2024-06-27 17:57:11,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:11,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 17:57:11,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:11,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 17:57:11,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 17:57:11,676 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:57:11,676 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 174 transitions, 1886 flow. Second operand has 5 states, 5 states have (on average 19.4) internal successors, (97), 5 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 17:57:11,676 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:11,676 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:57:11,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:12,234 INFO L124 PetriNetUnfolderBase]: 3323/5337 cut-off events. [2024-06-27 17:57:12,234 INFO L125 PetriNetUnfolderBase]: For 78160/78160 co-relation queries the response was YES. [2024-06-27 17:57:12,254 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27020 conditions, 5337 events. 3323/5337 cut-off events. For 78160/78160 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 34686 event pairs, 770 based on Foata normal form. 1/5329 useless extension candidates. Maximal degree in co-relation 26960. Up to 4877 conditions per place. [2024-06-27 17:57:12,274 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 157 selfloop transitions, 19 changer transitions 0/189 dead transitions. [2024-06-27 17:57:12,274 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 189 transitions, 2272 flow [2024-06-27 17:57:12,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:57:12,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:57:12,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 140 transitions. [2024-06-27 17:57:12,275 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6222222222222222 [2024-06-27 17:57:12,275 INFO L175 Difference]: Start difference. First operand has 132 places, 174 transitions, 1886 flow. Second operand 5 states and 140 transitions. [2024-06-27 17:57:12,275 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 189 transitions, 2272 flow [2024-06-27 17:57:12,396 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 189 transitions, 2241 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-06-27 17:57:12,400 INFO L231 Difference]: Finished difference. Result has 135 places, 174 transitions, 1899 flow [2024-06-27 17:57:12,400 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1855, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1899, PETRI_PLACES=135, PETRI_TRANSITIONS=174} [2024-06-27 17:57:12,401 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 86 predicate places. [2024-06-27 17:57:12,401 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 174 transitions, 1899 flow [2024-06-27 17:57:12,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.4) internal successors, (97), 5 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 17:57:12,401 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:12,401 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:12,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-27 17:57:12,402 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:57:12,402 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:12,402 INFO L85 PathProgramCache]: Analyzing trace with hash -765517007, now seen corresponding path program 1 times [2024-06-27 17:57:12,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:12,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470318793] [2024-06-27 17:57:12,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:12,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:12,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:12,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:12,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:12,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470318793] [2024-06-27 17:57:12,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470318793] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:12,471 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:12,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:57:12,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899815730] [2024-06-27 17:57:12,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:12,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:57:12,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:12,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:57:12,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:57:12,527 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:57:12,528 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 174 transitions, 1899 flow. Second operand has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:12,528 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:12,528 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:57:12,528 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:13,430 INFO L124 PetriNetUnfolderBase]: 4555/7359 cut-off events. [2024-06-27 17:57:13,431 INFO L125 PetriNetUnfolderBase]: For 146105/146105 co-relation queries the response was YES. [2024-06-27 17:57:13,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37750 conditions, 7359 events. 4555/7359 cut-off events. For 146105/146105 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 51348 event pairs, 778 based on Foata normal form. 48/7329 useless extension candidates. Maximal degree in co-relation 37689. Up to 2673 conditions per place. [2024-06-27 17:57:13,482 INFO L140 encePairwiseOnDemand]: 33/45 looper letters, 155 selfloop transitions, 76 changer transitions 0/244 dead transitions. [2024-06-27 17:57:13,482 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 244 transitions, 2995 flow [2024-06-27 17:57:13,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:57:13,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:57:13,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 234 transitions. [2024-06-27 17:57:13,483 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7428571428571429 [2024-06-27 17:57:13,484 INFO L175 Difference]: Start difference. First operand has 135 places, 174 transitions, 1899 flow. Second operand 7 states and 234 transitions. [2024-06-27 17:57:13,484 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 244 transitions, 2995 flow [2024-06-27 17:57:13,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 244 transitions, 2926 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-27 17:57:13,691 INFO L231 Difference]: Finished difference. Result has 138 places, 182 transitions, 2191 flow [2024-06-27 17:57:13,691 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1830, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2191, PETRI_PLACES=138, PETRI_TRANSITIONS=182} [2024-06-27 17:57:13,691 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 89 predicate places. [2024-06-27 17:57:13,691 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 182 transitions, 2191 flow [2024-06-27 17:57:13,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:13,692 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:13,692 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:13,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-27 17:57:13,692 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:57:13,692 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:13,693 INFO L85 PathProgramCache]: Analyzing trace with hash -763643057, now seen corresponding path program 2 times [2024-06-27 17:57:13,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:13,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500607603] [2024-06-27 17:57:13,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:13,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:13,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:13,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:13,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:13,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500607603] [2024-06-27 17:57:13,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500607603] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:13,761 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:13,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:57:13,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004410172] [2024-06-27 17:57:13,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:13,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:57:13,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:13,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:57:13,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:57:13,803 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:57:13,804 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 182 transitions, 2191 flow. Second operand has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:13,804 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:13,804 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:57:13,804 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:14,735 INFO L124 PetriNetUnfolderBase]: 5143/8317 cut-off events. [2024-06-27 17:57:14,735 INFO L125 PetriNetUnfolderBase]: For 180322/180322 co-relation queries the response was YES. [2024-06-27 17:57:14,758 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44915 conditions, 8317 events. 5143/8317 cut-off events. For 180322/180322 co-relation queries the response was YES. Maximal size of possible extension queue 566. Compared 59456 event pairs, 1242 based on Foata normal form. 48/8307 useless extension candidates. Maximal degree in co-relation 44852. Up to 5357 conditions per place. [2024-06-27 17:57:14,784 INFO L140 encePairwiseOnDemand]: 33/45 looper letters, 147 selfloop transitions, 80 changer transitions 0/240 dead transitions. [2024-06-27 17:57:14,784 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 240 transitions, 3141 flow [2024-06-27 17:57:14,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:57:14,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:57:14,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 229 transitions. [2024-06-27 17:57:14,785 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.726984126984127 [2024-06-27 17:57:14,785 INFO L175 Difference]: Start difference. First operand has 138 places, 182 transitions, 2191 flow. Second operand 7 states and 229 transitions. [2024-06-27 17:57:14,785 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 240 transitions, 3141 flow [2024-06-27 17:57:15,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 240 transitions, 2986 flow, removed 36 selfloop flow, removed 2 redundant places. [2024-06-27 17:57:15,141 INFO L231 Difference]: Finished difference. Result has 144 places, 188 transitions, 2361 flow [2024-06-27 17:57:15,141 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2036, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2361, PETRI_PLACES=144, PETRI_TRANSITIONS=188} [2024-06-27 17:57:15,142 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 95 predicate places. [2024-06-27 17:57:15,142 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 188 transitions, 2361 flow [2024-06-27 17:57:15,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:15,142 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:15,142 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:15,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-27 17:57:15,143 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:57:15,143 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:15,143 INFO L85 PathProgramCache]: Analyzing trace with hash -1609115909, now seen corresponding path program 1 times [2024-06-27 17:57:15,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:15,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830850217] [2024-06-27 17:57:15,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:15,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:15,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:15,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:15,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:15,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830850217] [2024-06-27 17:57:15,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830850217] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:15,203 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:15,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:57:15,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373422996] [2024-06-27 17:57:15,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:15,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:57:15,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:15,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:57:15,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:57:15,235 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:57:15,235 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 188 transitions, 2361 flow. Second operand has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:15,235 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:15,236 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:57:15,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:16,345 INFO L124 PetriNetUnfolderBase]: 5176/8405 cut-off events. [2024-06-27 17:57:16,345 INFO L125 PetriNetUnfolderBase]: For 171383/171383 co-relation queries the response was YES. [2024-06-27 17:57:16,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46177 conditions, 8405 events. 5176/8405 cut-off events. For 171383/171383 co-relation queries the response was YES. Maximal size of possible extension queue 569. Compared 60534 event pairs, 1479 based on Foata normal form. 3/8378 useless extension candidates. Maximal degree in co-relation 46111. Up to 6966 conditions per place. [2024-06-27 17:57:16,397 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 129 selfloop transitions, 84 changer transitions 0/226 dead transitions. [2024-06-27 17:57:16,397 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 226 transitions, 3121 flow [2024-06-27 17:57:16,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:57:16,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:57:16,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 190 transitions. [2024-06-27 17:57:16,401 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7037037037037037 [2024-06-27 17:57:16,401 INFO L175 Difference]: Start difference. First operand has 144 places, 188 transitions, 2361 flow. Second operand 6 states and 190 transitions. [2024-06-27 17:57:16,401 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 226 transitions, 3121 flow [2024-06-27 17:57:16,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 226 transitions, 2940 flow, removed 38 selfloop flow, removed 3 redundant places. [2024-06-27 17:57:16,770 INFO L231 Difference]: Finished difference. Result has 147 places, 193 transitions, 2443 flow [2024-06-27 17:57:16,770 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2186, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2443, PETRI_PLACES=147, PETRI_TRANSITIONS=193} [2024-06-27 17:57:16,771 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 98 predicate places. [2024-06-27 17:57:16,771 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 193 transitions, 2443 flow [2024-06-27 17:57:16,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:16,771 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:16,771 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:16,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-27 17:57:16,772 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:57:16,772 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:16,772 INFO L85 PathProgramCache]: Analyzing trace with hash -1397892273, now seen corresponding path program 3 times [2024-06-27 17:57:16,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:16,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456381921] [2024-06-27 17:57:16,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:16,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:16,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:16,838 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 17:57:16,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:16,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456381921] [2024-06-27 17:57:16,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456381921] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:16,839 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:16,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:57:16,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321250324] [2024-06-27 17:57:16,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:16,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:57:16,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:16,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:57:16,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:57:16,876 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:57:16,877 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 193 transitions, 2443 flow. Second operand has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:16,877 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:16,877 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:57:16,877 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:18,220 INFO L124 PetriNetUnfolderBase]: 5948/9805 cut-off events. [2024-06-27 17:57:18,220 INFO L125 PetriNetUnfolderBase]: For 222269/222269 co-relation queries the response was YES. [2024-06-27 17:57:18,255 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52739 conditions, 9805 events. 5948/9805 cut-off events. For 222269/222269 co-relation queries the response was YES. Maximal size of possible extension queue 671. Compared 74179 event pairs, 1483 based on Foata normal form. 42/9810 useless extension candidates. Maximal degree in co-relation 52671. Up to 6575 conditions per place. [2024-06-27 17:57:18,289 INFO L140 encePairwiseOnDemand]: 33/45 looper letters, 156 selfloop transitions, 86 changer transitions 0/255 dead transitions. [2024-06-27 17:57:18,289 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 255 transitions, 3517 flow [2024-06-27 17:57:18,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:57:18,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:57:18,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 232 transitions. [2024-06-27 17:57:18,291 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7365079365079366 [2024-06-27 17:57:18,291 INFO L175 Difference]: Start difference. First operand has 147 places, 193 transitions, 2443 flow. Second operand 7 states and 232 transitions. [2024-06-27 17:57:18,291 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 255 transitions, 3517 flow [2024-06-27 17:57:18,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 255 transitions, 3376 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-27 17:57:18,735 INFO L231 Difference]: Finished difference. Result has 152 places, 198 transitions, 2627 flow [2024-06-27 17:57:18,735 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2302, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2627, PETRI_PLACES=152, PETRI_TRANSITIONS=198} [2024-06-27 17:57:18,736 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 103 predicate places. [2024-06-27 17:57:18,736 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 198 transitions, 2627 flow [2024-06-27 17:57:18,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:18,736 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:18,736 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:18,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-27 17:57:18,736 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:57:18,736 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:18,737 INFO L85 PathProgramCache]: Analyzing trace with hash -1848593555, now seen corresponding path program 4 times [2024-06-27 17:57:18,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:18,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226195676] [2024-06-27 17:57:18,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:18,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:18,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:18,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:18,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:18,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226195676] [2024-06-27 17:57:18,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226195676] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:18,802 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:18,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:57:18,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455717043] [2024-06-27 17:57:18,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:18,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:57:18,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:18,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:57:18,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:57:18,836 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:57:18,837 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 198 transitions, 2627 flow. Second operand has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:18,837 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:18,837 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:57:18,837 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:20,199 INFO L124 PetriNetUnfolderBase]: 6319/10406 cut-off events. [2024-06-27 17:57:20,199 INFO L125 PetriNetUnfolderBase]: For 250533/250533 co-relation queries the response was YES. [2024-06-27 17:57:20,235 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56545 conditions, 10406 events. 6319/10406 cut-off events. For 250533/250533 co-relation queries the response was YES. Maximal size of possible extension queue 719. Compared 79535 event pairs, 1975 based on Foata normal form. 50/10417 useless extension candidates. Maximal degree in co-relation 56475. Up to 8227 conditions per place. [2024-06-27 17:57:20,271 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 150 selfloop transitions, 81 changer transitions 0/244 dead transitions. [2024-06-27 17:57:20,271 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 244 transitions, 3391 flow [2024-06-27 17:57:20,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:57:20,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:57:20,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 220 transitions. [2024-06-27 17:57:20,273 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6984126984126984 [2024-06-27 17:57:20,273 INFO L175 Difference]: Start difference. First operand has 152 places, 198 transitions, 2627 flow. Second operand 7 states and 220 transitions. [2024-06-27 17:57:20,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 244 transitions, 3391 flow [2024-06-27 17:57:20,854 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 244 transitions, 3214 flow, removed 32 selfloop flow, removed 3 redundant places. [2024-06-27 17:57:20,857 INFO L231 Difference]: Finished difference. Result has 156 places, 200 transitions, 2691 flow [2024-06-27 17:57:20,857 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2452, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2691, PETRI_PLACES=156, PETRI_TRANSITIONS=200} [2024-06-27 17:57:20,858 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 107 predicate places. [2024-06-27 17:57:20,858 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 200 transitions, 2691 flow [2024-06-27 17:57:20,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:20,858 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:20,858 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:20,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-27 17:57:20,859 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:57:20,859 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:20,859 INFO L85 PathProgramCache]: Analyzing trace with hash -1397888553, now seen corresponding path program 5 times [2024-06-27 17:57:20,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:20,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930491567] [2024-06-27 17:57:20,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:20,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:20,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:20,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:20,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:20,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930491567] [2024-06-27 17:57:20,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930491567] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:20,936 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:20,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:57:20,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410805513] [2024-06-27 17:57:20,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:20,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:57:20,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:20,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:57:20,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:57:20,980 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:57:20,980 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 200 transitions, 2691 flow. Second operand has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:20,980 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:20,980 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:57:20,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:22,464 INFO L124 PetriNetUnfolderBase]: 6690/10981 cut-off events. [2024-06-27 17:57:22,464 INFO L125 PetriNetUnfolderBase]: For 266944/266944 co-relation queries the response was YES. [2024-06-27 17:57:22,509 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59332 conditions, 10981 events. 6690/10981 cut-off events. For 266944/266944 co-relation queries the response was YES. Maximal size of possible extension queue 764. Compared 84336 event pairs, 2101 based on Foata normal form. 50/10994 useless extension candidates. Maximal degree in co-relation 59260. Up to 8824 conditions per place. [2024-06-27 17:57:22,555 INFO L140 encePairwiseOnDemand]: 33/45 looper letters, 152 selfloop transitions, 85 changer transitions 0/250 dead transitions. [2024-06-27 17:57:22,555 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 250 transitions, 3547 flow [2024-06-27 17:57:22,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:57:22,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:57:22,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 225 transitions. [2024-06-27 17:57:22,556 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7142857142857143 [2024-06-27 17:57:22,557 INFO L175 Difference]: Start difference. First operand has 156 places, 200 transitions, 2691 flow. Second operand 7 states and 225 transitions. [2024-06-27 17:57:22,557 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 250 transitions, 3547 flow [2024-06-27 17:57:23,058 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 250 transitions, 3342 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-27 17:57:23,061 INFO L231 Difference]: Finished difference. Result has 158 places, 202 transitions, 2737 flow [2024-06-27 17:57:23,061 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2486, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2737, PETRI_PLACES=158, PETRI_TRANSITIONS=202} [2024-06-27 17:57:23,061 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 109 predicate places. [2024-06-27 17:57:23,061 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 202 transitions, 2737 flow [2024-06-27 17:57:23,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:23,062 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:23,062 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:23,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-27 17:57:23,062 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:57:23,062 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:23,062 INFO L85 PathProgramCache]: Analyzing trace with hash -1392166821, now seen corresponding path program 1 times [2024-06-27 17:57:23,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:23,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990210302] [2024-06-27 17:57:23,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:23,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:23,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:23,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:23,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:23,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990210302] [2024-06-27 17:57:23,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990210302] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:23,140 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:23,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:57:23,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307087737] [2024-06-27 17:57:23,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:23,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:57:23,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:23,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:57:23,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:57:23,203 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:57:23,204 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 202 transitions, 2737 flow. Second operand has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:23,204 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:23,204 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:57:23,204 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:24,786 INFO L124 PetriNetUnfolderBase]: 6992/11531 cut-off events. [2024-06-27 17:57:24,786 INFO L125 PetriNetUnfolderBase]: For 282900/282900 co-relation queries the response was YES. [2024-06-27 17:57:24,832 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61306 conditions, 11531 events. 6992/11531 cut-off events. For 282900/282900 co-relation queries the response was YES. Maximal size of possible extension queue 805. Compared 90063 event pairs, 1965 based on Foata normal form. 42/11509 useless extension candidates. Maximal degree in co-relation 61233. Up to 7370 conditions per place. [2024-06-27 17:57:24,874 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 152 selfloop transitions, 89 changer transitions 0/254 dead transitions. [2024-06-27 17:57:24,874 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 254 transitions, 3554 flow [2024-06-27 17:57:24,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:57:24,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:57:24,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 224 transitions. [2024-06-27 17:57:24,875 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7111111111111111 [2024-06-27 17:57:24,875 INFO L175 Difference]: Start difference. First operand has 158 places, 202 transitions, 2737 flow. Second operand 7 states and 224 transitions. [2024-06-27 17:57:24,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 254 transitions, 3554 flow [2024-06-27 17:57:25,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 254 transitions, 3337 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-27 17:57:25,268 INFO L231 Difference]: Finished difference. Result has 160 places, 204 transitions, 2779 flow [2024-06-27 17:57:25,268 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2520, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2779, PETRI_PLACES=160, PETRI_TRANSITIONS=204} [2024-06-27 17:57:25,268 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 111 predicate places. [2024-06-27 17:57:25,268 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 204 transitions, 2779 flow [2024-06-27 17:57:25,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:25,269 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:25,269 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:25,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-27 17:57:25,269 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:57:25,269 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:25,269 INFO L85 PathProgramCache]: Analyzing trace with hash 934190201, now seen corresponding path program 2 times [2024-06-27 17:57:25,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:25,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914695621] [2024-06-27 17:57:25,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:25,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:25,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:25,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:25,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:25,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914695621] [2024-06-27 17:57:25,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914695621] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:25,329 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:25,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:57:25,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496813448] [2024-06-27 17:57:25,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:25,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:57:25,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:25,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:57:25,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:57:25,359 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:57:25,360 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 204 transitions, 2779 flow. Second operand has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:25,360 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:25,360 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:57:25,360 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:27,019 INFO L124 PetriNetUnfolderBase]: 7085/11667 cut-off events. [2024-06-27 17:57:27,019 INFO L125 PetriNetUnfolderBase]: For 267724/267724 co-relation queries the response was YES. [2024-06-27 17:57:27,068 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62477 conditions, 11667 events. 7085/11667 cut-off events. For 267724/267724 co-relation queries the response was YES. Maximal size of possible extension queue 808. Compared 90686 event pairs, 2280 based on Foata normal form. 3/11627 useless extension candidates. Maximal degree in co-relation 62403. Up to 9911 conditions per place. [2024-06-27 17:57:27,116 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 140 selfloop transitions, 91 changer transitions 0/244 dead transitions. [2024-06-27 17:57:27,116 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 244 transitions, 3736 flow [2024-06-27 17:57:27,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:57:27,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:57:27,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 183 transitions. [2024-06-27 17:57:27,117 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6777777777777778 [2024-06-27 17:57:27,117 INFO L175 Difference]: Start difference. First operand has 160 places, 204 transitions, 2779 flow. Second operand 6 states and 183 transitions. [2024-06-27 17:57:27,117 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 244 transitions, 3736 flow [2024-06-27 17:57:27,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 244 transitions, 3486 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-06-27 17:57:27,688 INFO L231 Difference]: Finished difference. Result has 162 places, 217 transitions, 2988 flow [2024-06-27 17:57:27,688 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2549, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2988, PETRI_PLACES=162, PETRI_TRANSITIONS=217} [2024-06-27 17:57:27,689 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 113 predicate places. [2024-06-27 17:57:27,689 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 217 transitions, 2988 flow [2024-06-27 17:57:27,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:27,689 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:27,689 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:27,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-27 17:57:27,690 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:57:27,690 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:27,690 INFO L85 PathProgramCache]: Analyzing trace with hash 1923827453, now seen corresponding path program 6 times [2024-06-27 17:57:27,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:27,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596666728] [2024-06-27 17:57:27,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:27,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:27,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:27,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:27,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:27,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596666728] [2024-06-27 17:57:27,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596666728] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:27,808 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:27,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:57:27,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482848865] [2024-06-27 17:57:27,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:27,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:57:27,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:27,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:57:27,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:57:27,856 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:57:27,856 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 217 transitions, 2988 flow. Second operand has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:27,856 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:27,856 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:57:27,856 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:29,650 INFO L124 PetriNetUnfolderBase]: 7324/12055 cut-off events. [2024-06-27 17:57:29,650 INFO L125 PetriNetUnfolderBase]: For 295906/295916 co-relation queries the response was YES. [2024-06-27 17:57:29,695 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62749 conditions, 12055 events. 7324/12055 cut-off events. For 295906/295916 co-relation queries the response was YES. Maximal size of possible extension queue 846. Compared 94273 event pairs, 2407 based on Foata normal form. 55/12068 useless extension candidates. Maximal degree in co-relation 62673. Up to 9744 conditions per place. [2024-06-27 17:57:29,736 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 169 selfloop transitions, 78 changer transitions 0/260 dead transitions. [2024-06-27 17:57:29,737 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 260 transitions, 3800 flow [2024-06-27 17:57:29,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:57:29,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:57:29,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 215 transitions. [2024-06-27 17:57:29,737 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6825396825396826 [2024-06-27 17:57:29,738 INFO L175 Difference]: Start difference. First operand has 162 places, 217 transitions, 2988 flow. Second operand 7 states and 215 transitions. [2024-06-27 17:57:29,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 260 transitions, 3800 flow [2024-06-27 17:57:30,204 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 260 transitions, 3683 flow, removed 14 selfloop flow, removed 2 redundant places. [2024-06-27 17:57:30,207 INFO L231 Difference]: Finished difference. Result has 167 places, 219 transitions, 3114 flow [2024-06-27 17:57:30,208 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2871, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3114, PETRI_PLACES=167, PETRI_TRANSITIONS=219} [2024-06-27 17:57:30,208 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 118 predicate places. [2024-06-27 17:57:30,208 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 219 transitions, 3114 flow [2024-06-27 17:57:30,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:30,208 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:30,209 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:30,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-27 17:57:30,209 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:57:30,209 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:30,209 INFO L85 PathProgramCache]: Analyzing trace with hash 1924042655, now seen corresponding path program 2 times [2024-06-27 17:57:30,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:30,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624468719] [2024-06-27 17:57:30,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:30,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:30,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:30,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:30,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:30,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624468719] [2024-06-27 17:57:30,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624468719] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:30,281 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:30,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:57:30,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092073905] [2024-06-27 17:57:30,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:30,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:57:30,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:30,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:57:30,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:57:30,319 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:57:30,319 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 219 transitions, 3114 flow. Second operand has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:30,320 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:30,320 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:57:30,320 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:32,115 INFO L124 PetriNetUnfolderBase]: 7532/12437 cut-off events. [2024-06-27 17:57:32,115 INFO L125 PetriNetUnfolderBase]: For 303798/303808 co-relation queries the response was YES. [2024-06-27 17:57:32,161 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63946 conditions, 12437 events. 7532/12437 cut-off events. For 303798/303808 co-relation queries the response was YES. Maximal size of possible extension queue 879. Compared 98332 event pairs, 2372 based on Foata normal form. 47/12442 useless extension candidates. Maximal degree in co-relation 63869. Up to 9465 conditions per place. [2024-06-27 17:57:32,209 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 173 selfloop transitions, 82 changer transitions 0/268 dead transitions. [2024-06-27 17:57:32,209 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 268 transitions, 3969 flow [2024-06-27 17:57:32,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:57:32,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:57:32,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 220 transitions. [2024-06-27 17:57:32,210 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6984126984126984 [2024-06-27 17:57:32,210 INFO L175 Difference]: Start difference. First operand has 167 places, 219 transitions, 3114 flow. Second operand 7 states and 220 transitions. [2024-06-27 17:57:32,210 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 268 transitions, 3969 flow [2024-06-27 17:57:32,793 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 268 transitions, 3760 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-27 17:57:32,796 INFO L231 Difference]: Finished difference. Result has 169 places, 221 transitions, 3155 flow [2024-06-27 17:57:32,796 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2905, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3155, PETRI_PLACES=169, PETRI_TRANSITIONS=221} [2024-06-27 17:57:32,796 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 120 predicate places. [2024-06-27 17:57:32,796 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 221 transitions, 3155 flow [2024-06-27 17:57:32,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:32,797 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:32,797 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:32,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-27 17:57:32,797 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:57:32,797 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:32,797 INFO L85 PathProgramCache]: Analyzing trace with hash -2105227361, now seen corresponding path program 3 times [2024-06-27 17:57:32,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:32,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39135927] [2024-06-27 17:57:32,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:32,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:32,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:32,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:32,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:32,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39135927] [2024-06-27 17:57:32,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39135927] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:32,867 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:32,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:57:32,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789654759] [2024-06-27 17:57:32,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:32,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:57:32,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:32,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:57:32,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:57:32,904 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:57:32,904 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 221 transitions, 3155 flow. Second operand has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:32,905 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:32,905 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:57:32,905 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:34,662 INFO L124 PetriNetUnfolderBase]: 7969/13191 cut-off events. [2024-06-27 17:57:34,662 INFO L125 PetriNetUnfolderBase]: For 323030/323040 co-relation queries the response was YES. [2024-06-27 17:57:34,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66036 conditions, 13191 events. 7969/13191 cut-off events. For 323030/323040 co-relation queries the response was YES. Maximal size of possible extension queue 952. Compared 104971 event pairs, 2396 based on Foata normal form. 47/13196 useless extension candidates. Maximal degree in co-relation 65958. Up to 5706 conditions per place. [2024-06-27 17:57:34,774 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 173 selfloop transitions, 87 changer transitions 0/273 dead transitions. [2024-06-27 17:57:34,774 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 273 transitions, 3997 flow [2024-06-27 17:57:34,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:57:34,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:57:34,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 222 transitions. [2024-06-27 17:57:34,775 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7047619047619048 [2024-06-27 17:57:34,775 INFO L175 Difference]: Start difference. First operand has 169 places, 221 transitions, 3155 flow. Second operand 7 states and 222 transitions. [2024-06-27 17:57:34,775 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 273 transitions, 3997 flow [2024-06-27 17:57:35,657 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 273 transitions, 3774 flow, removed 31 selfloop flow, removed 5 redundant places. [2024-06-27 17:57:35,661 INFO L231 Difference]: Finished difference. Result has 170 places, 221 transitions, 3071 flow [2024-06-27 17:57:35,661 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2872, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3071, PETRI_PLACES=170, PETRI_TRANSITIONS=221} [2024-06-27 17:57:35,661 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 121 predicate places. [2024-06-27 17:57:35,661 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 221 transitions, 3071 flow [2024-06-27 17:57:35,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:35,662 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:35,662 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:35,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-27 17:57:35,662 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:57:35,662 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:35,663 INFO L85 PathProgramCache]: Analyzing trace with hash 812105717, now seen corresponding path program 3 times [2024-06-27 17:57:35,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:35,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130773736] [2024-06-27 17:57:35,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:35,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:35,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:35,717 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:35,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:35,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130773736] [2024-06-27 17:57:35,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130773736] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:35,718 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:35,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:57:35,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419848976] [2024-06-27 17:57:35,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:35,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:57:35,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:35,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:57:35,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:57:35,755 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:57:35,755 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 221 transitions, 3071 flow. Second operand has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:35,755 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:35,755 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:57:35,755 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:37,333 INFO L124 PetriNetUnfolderBase]: 7959/13183 cut-off events. [2024-06-27 17:57:37,334 INFO L125 PetriNetUnfolderBase]: For 297268/297272 co-relation queries the response was YES. [2024-06-27 17:57:37,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65656 conditions, 13183 events. 7959/13183 cut-off events. For 297268/297272 co-relation queries the response was YES. Maximal size of possible extension queue 956. Compared 105751 event pairs, 2759 based on Foata normal form. 7/13150 useless extension candidates. Maximal degree in co-relation 65577. Up to 11332 conditions per place. [2024-06-27 17:57:37,451 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 143 selfloop transitions, 86 changer transitions 0/242 dead transitions. [2024-06-27 17:57:37,452 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 242 transitions, 3803 flow [2024-06-27 17:57:37,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:57:37,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:57:37,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 178 transitions. [2024-06-27 17:57:37,454 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6592592592592592 [2024-06-27 17:57:37,454 INFO L175 Difference]: Start difference. First operand has 170 places, 221 transitions, 3071 flow. Second operand 6 states and 178 transitions. [2024-06-27 17:57:37,454 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 242 transitions, 3803 flow [2024-06-27 17:57:38,306 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 242 transitions, 3564 flow, removed 34 selfloop flow, removed 5 redundant places. [2024-06-27 17:57:38,311 INFO L231 Difference]: Finished difference. Result has 171 places, 221 transitions, 3015 flow [2024-06-27 17:57:38,311 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2832, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3015, PETRI_PLACES=171, PETRI_TRANSITIONS=221} [2024-06-27 17:57:38,312 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 122 predicate places. [2024-06-27 17:57:38,312 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 221 transitions, 3015 flow [2024-06-27 17:57:38,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:38,312 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:38,312 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:38,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-27 17:57:38,313 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:57:38,313 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:38,313 INFO L85 PathProgramCache]: Analyzing trace with hash -323932765, now seen corresponding path program 1 times [2024-06-27 17:57:38,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:38,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413078917] [2024-06-27 17:57:38,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:38,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:38,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:38,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:38,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:38,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413078917] [2024-06-27 17:57:38,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413078917] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:38,373 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:38,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:57:38,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369249375] [2024-06-27 17:57:38,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:38,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:57:38,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:38,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:57:38,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:57:38,410 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:57:38,410 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 221 transitions, 3015 flow. Second operand has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:38,411 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:38,411 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:57:38,411 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:40,362 INFO L124 PetriNetUnfolderBase]: 7818/12949 cut-off events. [2024-06-27 17:57:40,362 INFO L125 PetriNetUnfolderBase]: For 287632/287634 co-relation queries the response was YES. [2024-06-27 17:57:40,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64289 conditions, 12949 events. 7818/12949 cut-off events. For 287632/287634 co-relation queries the response was YES. Maximal size of possible extension queue 926. Compared 103427 event pairs, 2685 based on Foata normal form. 6/12910 useless extension candidates. Maximal degree in co-relation 64209. Up to 11000 conditions per place. [2024-06-27 17:57:40,470 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 150 selfloop transitions, 95 changer transitions 0/258 dead transitions. [2024-06-27 17:57:40,470 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 258 transitions, 4028 flow [2024-06-27 17:57:40,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:57:40,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:57:40,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 181 transitions. [2024-06-27 17:57:40,472 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6703703703703704 [2024-06-27 17:57:40,472 INFO L175 Difference]: Start difference. First operand has 171 places, 221 transitions, 3015 flow. Second operand 6 states and 181 transitions. [2024-06-27 17:57:40,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 258 transitions, 4028 flow [2024-06-27 17:57:41,036 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 258 transitions, 3540 flow, removed 28 selfloop flow, removed 9 redundant places. [2024-06-27 17:57:41,039 INFO L231 Difference]: Finished difference. Result has 169 places, 234 transitions, 3001 flow [2024-06-27 17:57:41,040 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2577, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3001, PETRI_PLACES=169, PETRI_TRANSITIONS=234} [2024-06-27 17:57:41,040 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 120 predicate places. [2024-06-27 17:57:41,040 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 234 transitions, 3001 flow [2024-06-27 17:57:41,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:41,040 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:41,040 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:41,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-27 17:57:41,040 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:57:41,041 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:41,041 INFO L85 PathProgramCache]: Analyzing trace with hash 817652981, now seen corresponding path program 2 times [2024-06-27 17:57:41,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:41,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706219182] [2024-06-27 17:57:41,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:41,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:41,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:41,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:41,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:41,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706219182] [2024-06-27 17:57:41,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706219182] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:41,093 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:41,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:57:41,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074294656] [2024-06-27 17:57:41,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:41,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:57:41,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:41,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:57:41,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:57:41,118 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:57:41,119 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 234 transitions, 3001 flow. Second operand has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:41,119 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:41,119 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:57:41,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:43,059 INFO L124 PetriNetUnfolderBase]: 7855/12971 cut-off events. [2024-06-27 17:57:43,060 INFO L125 PetriNetUnfolderBase]: For 286248/286250 co-relation queries the response was YES. [2024-06-27 17:57:43,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64319 conditions, 12971 events. 7855/12971 cut-off events. For 286248/286250 co-relation queries the response was YES. Maximal size of possible extension queue 917. Compared 103176 event pairs, 2708 based on Foata normal form. 3/12934 useless extension candidates. Maximal degree in co-relation 64240. Up to 11019 conditions per place. [2024-06-27 17:57:43,156 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 146 selfloop transitions, 101 changer transitions 0/260 dead transitions. [2024-06-27 17:57:43,156 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 260 transitions, 3864 flow [2024-06-27 17:57:43,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:57:43,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:57:43,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 176 transitions. [2024-06-27 17:57:43,157 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6518518518518519 [2024-06-27 17:57:43,157 INFO L175 Difference]: Start difference. First operand has 169 places, 234 transitions, 3001 flow. Second operand 6 states and 176 transitions. [2024-06-27 17:57:43,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 260 transitions, 3864 flow [2024-06-27 17:57:43,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 260 transitions, 3735 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-06-27 17:57:43,692 INFO L231 Difference]: Finished difference. Result has 173 places, 239 transitions, 3170 flow [2024-06-27 17:57:43,692 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2875, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3170, PETRI_PLACES=173, PETRI_TRANSITIONS=239} [2024-06-27 17:57:43,693 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 124 predicate places. [2024-06-27 17:57:43,693 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 239 transitions, 3170 flow [2024-06-27 17:57:43,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:43,693 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:43,693 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:43,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-27 17:57:43,693 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:57:43,694 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:43,694 INFO L85 PathProgramCache]: Analyzing trace with hash 1288875275, now seen corresponding path program 3 times [2024-06-27 17:57:43,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:43,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385842191] [2024-06-27 17:57:43,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:43,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:43,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:43,754 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:43,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:43,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385842191] [2024-06-27 17:57:43,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385842191] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:43,755 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:43,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:57:43,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934583526] [2024-06-27 17:57:43,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:43,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:57:43,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:43,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:57:43,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:57:43,801 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:57:43,801 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 239 transitions, 3170 flow. Second operand has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:43,801 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:43,801 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:57:43,801 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:45,484 INFO L124 PetriNetUnfolderBase]: 7848/12962 cut-off events. [2024-06-27 17:57:45,485 INFO L125 PetriNetUnfolderBase]: For 297295/297297 co-relation queries the response was YES. [2024-06-27 17:57:45,553 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64507 conditions, 12962 events. 7848/12962 cut-off events. For 297295/297297 co-relation queries the response was YES. Maximal size of possible extension queue 917. Compared 103144 event pairs, 2715 based on Foata normal form. 3/12925 useless extension candidates. Maximal degree in co-relation 64427. Up to 11017 conditions per place. [2024-06-27 17:57:45,608 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 143 selfloop transitions, 104 changer transitions 0/260 dead transitions. [2024-06-27 17:57:45,608 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 260 transitions, 3956 flow [2024-06-27 17:57:45,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:57:45,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:57:45,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 177 transitions. [2024-06-27 17:57:45,612 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6555555555555556 [2024-06-27 17:57:45,613 INFO L175 Difference]: Start difference. First operand has 173 places, 239 transitions, 3170 flow. Second operand 6 states and 177 transitions. [2024-06-27 17:57:45,614 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 260 transitions, 3956 flow [2024-06-27 17:57:46,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 260 transitions, 3664 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-27 17:57:46,259 INFO L231 Difference]: Finished difference. Result has 173 places, 239 transitions, 3095 flow [2024-06-27 17:57:46,259 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2878, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3095, PETRI_PLACES=173, PETRI_TRANSITIONS=239} [2024-06-27 17:57:46,260 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 124 predicate places. [2024-06-27 17:57:46,260 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 239 transitions, 3095 flow [2024-06-27 17:57:46,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:46,260 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:46,260 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:46,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-27 17:57:46,261 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:57:46,261 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:46,261 INFO L85 PathProgramCache]: Analyzing trace with hash 1288884203, now seen corresponding path program 1 times [2024-06-27 17:57:46,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:46,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985837888] [2024-06-27 17:57:46,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:46,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:46,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:46,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:46,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:46,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985837888] [2024-06-27 17:57:46,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985837888] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:46,328 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:46,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:57:46,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946819326] [2024-06-27 17:57:46,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:46,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:57:46,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:46,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:57:46,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:57:46,373 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:57:46,373 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 239 transitions, 3095 flow. Second operand has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:46,373 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:46,373 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:57:46,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:48,200 INFO L124 PetriNetUnfolderBase]: 7861/12983 cut-off events. [2024-06-27 17:57:48,200 INFO L125 PetriNetUnfolderBase]: For 307757/307762 co-relation queries the response was YES. [2024-06-27 17:57:48,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64566 conditions, 12983 events. 7861/12983 cut-off events. For 307757/307762 co-relation queries the response was YES. Maximal size of possible extension queue 924. Compared 103209 event pairs, 4177 based on Foata normal form. 8/12958 useless extension candidates. Maximal degree in co-relation 64487. Up to 12000 conditions per place. [2024-06-27 17:57:48,293 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 226 selfloop transitions, 22 changer transitions 0/261 dead transitions. [2024-06-27 17:57:48,294 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 261 transitions, 3683 flow [2024-06-27 17:57:48,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:57:48,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:57:48,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 162 transitions. [2024-06-27 17:57:48,295 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-27 17:57:48,295 INFO L175 Difference]: Start difference. First operand has 173 places, 239 transitions, 3095 flow. Second operand 6 states and 162 transitions. [2024-06-27 17:57:48,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 261 transitions, 3683 flow [2024-06-27 17:57:48,898 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 261 transitions, 3404 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-27 17:57:48,901 INFO L231 Difference]: Finished difference. Result has 173 places, 242 transitions, 2922 flow [2024-06-27 17:57:48,901 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2816, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2922, PETRI_PLACES=173, PETRI_TRANSITIONS=242} [2024-06-27 17:57:48,902 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 124 predicate places. [2024-06-27 17:57:48,902 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 242 transitions, 2922 flow [2024-06-27 17:57:48,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:48,902 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:48,902 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:48,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-27 17:57:48,903 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:57:48,903 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:48,903 INFO L85 PathProgramCache]: Analyzing trace with hash -1208023541, now seen corresponding path program 1 times [2024-06-27 17:57:48,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:48,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865313477] [2024-06-27 17:57:48,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:48,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:48,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:48,954 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:48,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:48,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865313477] [2024-06-27 17:57:48,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865313477] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:48,954 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:48,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:57:48,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296477762] [2024-06-27 17:57:48,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:48,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:57:48,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:48,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:57:48,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:57:48,981 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:57:48,981 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 242 transitions, 2922 flow. Second operand has 6 states, 6 states have (on average 19.333333333333332) internal successors, (116), 6 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:48,982 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:48,982 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:57:48,982 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:50,575 INFO L124 PetriNetUnfolderBase]: 7894/13062 cut-off events. [2024-06-27 17:57:50,575 INFO L125 PetriNetUnfolderBase]: For 316640/316645 co-relation queries the response was YES. [2024-06-27 17:57:50,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64545 conditions, 13062 events. 7894/13062 cut-off events. For 316640/316645 co-relation queries the response was YES. Maximal size of possible extension queue 923. Compared 104187 event pairs, 2683 based on Foata normal form. 7/13013 useless extension candidates. Maximal degree in co-relation 64467. Up to 11064 conditions per place. [2024-06-27 17:57:50,697 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 170 selfloop transitions, 90 changer transitions 0/273 dead transitions. [2024-06-27 17:57:50,697 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 273 transitions, 3749 flow [2024-06-27 17:57:50,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:57:50,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:57:50,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 179 transitions. [2024-06-27 17:57:50,698 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.662962962962963 [2024-06-27 17:57:50,699 INFO L175 Difference]: Start difference. First operand has 173 places, 242 transitions, 2922 flow. Second operand 6 states and 179 transitions. [2024-06-27 17:57:50,699 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 273 transitions, 3749 flow [2024-06-27 17:57:51,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 273 transitions, 3665 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-27 17:57:51,702 INFO L231 Difference]: Finished difference. Result has 175 places, 247 transitions, 3103 flow [2024-06-27 17:57:51,702 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2838, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3103, PETRI_PLACES=175, PETRI_TRANSITIONS=247} [2024-06-27 17:57:51,703 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 126 predicate places. [2024-06-27 17:57:51,703 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 247 transitions, 3103 flow [2024-06-27 17:57:51,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.333333333333332) internal successors, (116), 6 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:51,703 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:51,703 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:51,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-27 17:57:51,704 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:57:51,704 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:51,704 INFO L85 PathProgramCache]: Analyzing trace with hash 688919670, now seen corresponding path program 1 times [2024-06-27 17:57:51,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:51,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630489336] [2024-06-27 17:57:51,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:51,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:51,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:51,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:51,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:51,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630489336] [2024-06-27 17:57:51,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630489336] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:51,761 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:51,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:57:51,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749601817] [2024-06-27 17:57:51,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:51,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:57:51,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:51,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:57:51,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:57:51,798 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:57:51,798 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 247 transitions, 3103 flow. Second operand has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:51,798 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:51,798 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:57:51,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:53,570 INFO L124 PetriNetUnfolderBase]: 7878/13042 cut-off events. [2024-06-27 17:57:53,570 INFO L125 PetriNetUnfolderBase]: For 328810/328810 co-relation queries the response was YES. [2024-06-27 17:57:53,629 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65056 conditions, 13042 events. 7878/13042 cut-off events. For 328810/328810 co-relation queries the response was YES. Maximal size of possible extension queue 928. Compared 104051 event pairs, 2616 based on Foata normal form. 4/12993 useless extension candidates. Maximal degree in co-relation 64977. Up to 11055 conditions per place. [2024-06-27 17:57:53,677 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 163 selfloop transitions, 101 changer transitions 0/277 dead transitions. [2024-06-27 17:57:53,677 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 277 transitions, 3965 flow [2024-06-27 17:57:53,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:57:53,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:57:53,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 186 transitions. [2024-06-27 17:57:53,680 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6888888888888889 [2024-06-27 17:57:53,680 INFO L175 Difference]: Start difference. First operand has 175 places, 247 transitions, 3103 flow. Second operand 6 states and 186 transitions. [2024-06-27 17:57:53,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 277 transitions, 3965 flow [2024-06-27 17:57:54,311 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 277 transitions, 3767 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-27 17:57:54,314 INFO L231 Difference]: Finished difference. Result has 177 places, 247 transitions, 3116 flow [2024-06-27 17:57:54,314 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2905, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3116, PETRI_PLACES=177, PETRI_TRANSITIONS=247} [2024-06-27 17:57:54,314 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 128 predicate places. [2024-06-27 17:57:54,315 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 247 transitions, 3116 flow [2024-06-27 17:57:54,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:54,315 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:54,315 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:54,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-27 17:57:54,315 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:57:54,316 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:54,316 INFO L85 PathProgramCache]: Analyzing trace with hash -104760580, now seen corresponding path program 2 times [2024-06-27 17:57:54,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:54,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693955755] [2024-06-27 17:57:54,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:54,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:54,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:54,366 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:54,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:54,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693955755] [2024-06-27 17:57:54,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693955755] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:54,367 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:54,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:57:54,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465353902] [2024-06-27 17:57:54,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:54,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:57:54,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:54,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:57:54,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:57:54,395 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:57:54,396 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 247 transitions, 3116 flow. Second operand has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:54,396 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:54,396 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:57:54,396 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:56,029 INFO L124 PetriNetUnfolderBase]: 7872/12986 cut-off events. [2024-06-27 17:57:56,029 INFO L125 PetriNetUnfolderBase]: For 335982/335982 co-relation queries the response was YES. [2024-06-27 17:57:56,095 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65273 conditions, 12986 events. 7872/12986 cut-off events. For 335982/335982 co-relation queries the response was YES. Maximal size of possible extension queue 921. Compared 103381 event pairs, 2588 based on Foata normal form. 2/12949 useless extension candidates. Maximal degree in co-relation 65194. Up to 11054 conditions per place. [2024-06-27 17:57:56,141 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 156 selfloop transitions, 105 changer transitions 0/274 dead transitions. [2024-06-27 17:57:56,142 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 274 transitions, 3970 flow [2024-06-27 17:57:56,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:57:56,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:57:56,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 181 transitions. [2024-06-27 17:57:56,142 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6703703703703704 [2024-06-27 17:57:56,142 INFO L175 Difference]: Start difference. First operand has 177 places, 247 transitions, 3116 flow. Second operand 6 states and 181 transitions. [2024-06-27 17:57:56,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 274 transitions, 3970 flow [2024-06-27 17:57:57,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 274 transitions, 3795 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-27 17:57:57,151 INFO L231 Difference]: Finished difference. Result has 180 places, 247 transitions, 3160 flow [2024-06-27 17:57:57,151 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2941, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3160, PETRI_PLACES=180, PETRI_TRANSITIONS=247} [2024-06-27 17:57:57,151 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 131 predicate places. [2024-06-27 17:57:57,151 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 247 transitions, 3160 flow [2024-06-27 17:57:57,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:57,152 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:57,152 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:57,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-27 17:57:57,152 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:57:57,152 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:57,153 INFO L85 PathProgramCache]: Analyzing trace with hash 822133313, now seen corresponding path program 2 times [2024-06-27 17:57:57,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:57,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606530989] [2024-06-27 17:57:57,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:57,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:57,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:57,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:57,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:57,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606530989] [2024-06-27 17:57:57,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606530989] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:57,205 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:57,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:57:57,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695850918] [2024-06-27 17:57:57,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:57,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:57:57,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:57,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:57:57,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:57:57,246 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:57:57,246 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 247 transitions, 3160 flow. Second operand has 6 states, 6 states have (on average 19.333333333333332) internal successors, (116), 6 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:57,246 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:57,246 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:57:57,246 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:58,954 INFO L124 PetriNetUnfolderBase]: 7909/13062 cut-off events. [2024-06-27 17:57:58,954 INFO L125 PetriNetUnfolderBase]: For 351825/351827 co-relation queries the response was YES. [2024-06-27 17:57:59,019 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66118 conditions, 13062 events. 7909/13062 cut-off events. For 351825/351827 co-relation queries the response was YES. Maximal size of possible extension queue 922. Compared 104021 event pairs, 2642 based on Foata normal form. 3/13025 useless extension candidates. Maximal degree in co-relation 66038. Up to 11087 conditions per place. [2024-06-27 17:57:59,073 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 151 selfloop transitions, 109 changer transitions 0/273 dead transitions. [2024-06-27 17:57:59,074 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 273 transitions, 4085 flow [2024-06-27 17:57:59,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:57:59,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:57:59,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 176 transitions. [2024-06-27 17:57:59,075 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6518518518518519 [2024-06-27 17:57:59,075 INFO L175 Difference]: Start difference. First operand has 180 places, 247 transitions, 3160 flow. Second operand 6 states and 176 transitions. [2024-06-27 17:57:59,075 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 273 transitions, 4085 flow [2024-06-27 17:57:59,906 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 273 transitions, 3902 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-27 17:57:59,910 INFO L231 Difference]: Finished difference. Result has 183 places, 252 transitions, 3287 flow [2024-06-27 17:57:59,910 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2983, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3287, PETRI_PLACES=183, PETRI_TRANSITIONS=252} [2024-06-27 17:57:59,911 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 134 predicate places. [2024-06-27 17:57:59,911 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 252 transitions, 3287 flow [2024-06-27 17:57:59,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.333333333333332) internal successors, (116), 6 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:59,911 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:59,911 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:59,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-27 17:57:59,912 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:57:59,912 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:59,912 INFO L85 PathProgramCache]: Analyzing trace with hash -1198757951, now seen corresponding path program 3 times [2024-06-27 17:57:59,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:59,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310203741] [2024-06-27 17:57:59,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:59,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:59,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:59,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:59,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:59,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310203741] [2024-06-27 17:57:59,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310203741] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:59,972 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:59,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:57:59,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519144059] [2024-06-27 17:57:59,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:59,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:57:59,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:59,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:57:59,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:57:59,996 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:57:59,996 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 252 transitions, 3287 flow. Second operand has 6 states, 6 states have (on average 19.333333333333332) internal successors, (116), 6 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:59,997 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:59,997 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:57:59,997 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand