./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-atomic/peterson.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/peterson.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-atomic/peterson.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/peterson.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 [2024-06-28 00:51:40,640 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-28 00:51:40,703 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-28 00:51:40,716 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-28 00:51:40,717 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-28 00:51:40,743 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-28 00:51:40,743 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-28 00:51:40,744 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-28 00:51:40,744 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-28 00:51:40,747 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-28 00:51:40,747 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-28 00:51:40,748 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-28 00:51:40,748 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-28 00:51:40,749 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-28 00:51:40,749 INFO L153 SettingsManager]: * Use SBE=true [2024-06-28 00:51:40,750 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-28 00:51:40,750 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-28 00:51:40,750 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-28 00:51:40,750 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-28 00:51:40,750 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-28 00:51:40,751 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-28 00:51:40,751 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-28 00:51:40,751 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-28 00:51:40,751 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-28 00:51:40,752 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-28 00:51:40,752 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-28 00:51:40,752 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-28 00:51:40,752 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-28 00:51:40,753 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-28 00:51:40,753 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-28 00:51:40,753 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-28 00:51:40,754 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-28 00:51:40,754 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-28 00:51:40,754 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-28 00:51:40,754 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-28 00:51:40,754 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-28 00:51:40,755 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-28 00:51:40,755 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-28 00:51:40,755 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-28 00:51:40,755 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-28 00:51:40,755 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-28 00:51:40,755 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-28 00:51:40,756 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-28 00:51:40,756 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-06-28 00:51:40,980 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-28 00:51:41,012 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-28 00:51:41,014 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-28 00:51:41,015 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-28 00:51:41,015 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-28 00:51:41,016 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/peterson.yml/witness.yml [2024-06-28 00:51:41,106 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-28 00:51:41,106 INFO L274 PluginConnector]: CDTParser initialized [2024-06-28 00:51:41,106 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-atomic/peterson.i [2024-06-28 00:51:42,107 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-28 00:51:42,352 INFO L384 CDTParser]: Found 1 translation units. [2024-06-28 00:51:42,352 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-atomic/peterson.i [2024-06-28 00:51:42,363 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8cf8c4c88/e4dcaaf7aad145199acece6aab3175fb/FLAG7c6602b94 [2024-06-28 00:51:42,375 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8cf8c4c88/e4dcaaf7aad145199acece6aab3175fb [2024-06-28 00:51:42,375 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-28 00:51:42,376 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-28 00:51:42,377 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-28 00:51:42,377 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-28 00:51:42,381 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-28 00:51:42,381 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 12:51:41" (1/2) ... [2024-06-28 00:51:42,382 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5c2f4126 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:51:42, skipping insertion in model container [2024-06-28 00:51:42,382 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 12:51:41" (1/2) ... [2024-06-28 00:51:42,383 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@59139c6f and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:51:42, skipping insertion in model container [2024-06-28 00:51:42,384 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.06 12:51:42" (2/2) ... [2024-06-28 00:51:42,384 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5c2f4126 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 12:51:42, skipping insertion in model container [2024-06-28 00:51:42,384 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.06 12:51:42" (2/2) ... [2024-06-28 00:51:42,384 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-28 00:51:42,427 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-28 00:51:42,428 INFO L97 edCorrectnessWitness]: Location invariant before [L763-L763] ((((! multithreaded || (turn == 0 || turn == 1)) && (! multithreaded || (flag2 == 0 || flag2 == 1))) && (! multithreaded || (flag1 == 0 || flag1 == 1))) && (! multithreaded || (((flag1 == 0 || flag1 == 1) && (flag2 == 0 || flag2 == 1)) && (turn == 0 || turn == 1)))) && (! multithreaded || (x == 0 || x == 1)) [2024-06-28 00:51:42,428 INFO L97 edCorrectnessWitness]: Location invariant before [L762-L762] ((((! multithreaded || (turn == 0 || turn == 1)) && (! multithreaded || (flag2 == 0 || flag2 == 1))) && (! multithreaded || (flag1 == 0 || flag1 == 1))) && (! multithreaded || (((flag1 == 0 || flag1 == 1) && (flag2 == 0 || flag2 == 1)) && (turn == 0 || turn == 1)))) && (! multithreaded || (x == 0 || x == 1)) [2024-06-28 00:51:42,428 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-28 00:51:42,429 INFO L106 edCorrectnessWitness]: ghost_update [L761-L761] multithreaded = 1; [2024-06-28 00:51:42,472 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-28 00:51:42,729 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-atomic/peterson.i[30997,31010] [2024-06-28 00:51:42,733 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-atomic/peterson.i[31682,31695] [2024-06-28 00:51:42,736 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-28 00:51:42,742 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local [2024-06-28 00:51:42,795 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-atomic/peterson.i[30997,31010] [2024-06-28 00:51:42,797 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-atomic/peterson.i[31682,31695] Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-28 00:51:42,808 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-28 00:51:42,831 INFO L206 MainTranslator]: Completed translation [2024-06-28 00:51:42,831 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 12:51:42 WrapperNode [2024-06-28 00:51:42,832 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-28 00:51:42,832 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-28 00:51:42,832 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-28 00:51:42,833 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-28 00:51:42,837 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 12:51:42" (1/1) ... [2024-06-28 00:51:42,847 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 12:51:42" (1/1) ... [2024-06-28 00:51:42,868 INFO L138 Inliner]: procedures = 169, calls = 36, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 35 [2024-06-28 00:51:42,869 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-28 00:51:42,869 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-28 00:51:42,869 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-28 00:51:42,869 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-28 00:51:42,876 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 12:51:42" (1/1) ... [2024-06-28 00:51:42,876 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 12:51:42" (1/1) ... [2024-06-28 00:51:42,878 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 12:51:42" (1/1) ... [2024-06-28 00:51:42,886 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]. [2024-06-28 00:51:42,887 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 12:51:42" (1/1) ... [2024-06-28 00:51:42,887 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 12:51:42" (1/1) ... [2024-06-28 00:51:42,890 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 12:51:42" (1/1) ... [2024-06-28 00:51:42,892 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 12:51:42" (1/1) ... [2024-06-28 00:51:42,893 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 12:51:42" (1/1) ... [2024-06-28 00:51:42,894 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 12:51:42" (1/1) ... [2024-06-28 00:51:42,895 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-28 00:51:42,896 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-28 00:51:42,896 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-28 00:51:42,896 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-28 00:51:42,897 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 12:51:42" (1/1) ... [2024-06-28 00:51:42,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-28 00:51:42,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 00:51:42,917 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) [2024-06-28 00:51:42,931 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 [2024-06-28 00:51:42,946 INFO L130 BoogieDeclarations]: Found specification of procedure thr2 [2024-06-28 00:51:42,946 INFO L138 BoogieDeclarations]: Found implementation of procedure thr2 [2024-06-28 00:51:42,946 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2024-06-28 00:51:42,946 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2024-06-28 00:51:42,946 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-28 00:51:42,946 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-28 00:51:42,946 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-28 00:51:42,946 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-28 00:51:42,946 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-28 00:51:42,947 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-28 00:51:42,947 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-28 00:51:43,049 INFO L244 CfgBuilder]: Building ICFG [2024-06-28 00:51:43,051 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-28 00:51:43,179 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-28 00:51:43,179 INFO L293 CfgBuilder]: Performing block encoding [2024-06-28 00:51:43,276 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-28 00:51:43,276 INFO L320 CfgBuilder]: Removed 2 assume(true) statements. [2024-06-28 00:51:43,276 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.06 12:51:43 BoogieIcfgContainer [2024-06-28 00:51:43,276 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-28 00:51:43,278 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-28 00:51:43,278 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-28 00:51:43,280 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-28 00:51:43,281 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 12:51:41" (1/4) ... [2024-06-28 00:51:43,281 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@302d02e6 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 28.06 12:51:43, skipping insertion in model container [2024-06-28 00:51:43,281 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.06 12:51:42" (2/4) ... [2024-06-28 00:51:43,281 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@302d02e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.06 12:51:43, skipping insertion in model container [2024-06-28 00:51:43,281 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 12:51:42" (3/4) ... [2024-06-28 00:51:43,282 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@302d02e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.06 12:51:43, skipping insertion in model container [2024-06-28 00:51:43,282 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.06 12:51:43" (4/4) ... [2024-06-28 00:51:43,282 INFO L112 eAbstractionObserver]: Analyzing ICFG peterson.i [2024-06-28 00:51:43,295 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-28 00:51:43,295 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-28 00:51:43,295 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-28 00:51:43,325 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-06-28 00:51:43,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 48 places, 45 transitions, 104 flow [2024-06-28 00:51:43,393 INFO L124 PetriNetUnfolderBase]: 4/43 cut-off events. [2024-06-28 00:51:43,395 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-06-28 00:51:43,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52 conditions, 43 events. 4/43 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 71 event pairs, 0 based on Foata normal form. 0/35 useless extension candidates. Maximal degree in co-relation 39. Up to 2 conditions per place. [2024-06-28 00:51:43,398 INFO L82 GeneralOperation]: Start removeDead. Operand has 48 places, 45 transitions, 104 flow [2024-06-28 00:51:43,400 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 44 places, 41 transitions, 91 flow [2024-06-28 00:51:43,407 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-28 00:51:43,420 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;@1a3a6d26, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-28 00:51:43,421 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-06-28 00:51:43,423 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-28 00:51:43,423 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-28 00:51:43,423 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-28 00:51:43,424 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:51:43,424 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-28 00:51:43,424 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 00:51:43,428 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:51:43,428 INFO L85 PathProgramCache]: Analyzing trace with hash 191911206, now seen corresponding path program 1 times [2024-06-28 00:51:43,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:51:43,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922337018] [2024-06-28 00:51:43,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:51:43,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:51:43,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:51:43,689 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:51:43,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:51:43,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922337018] [2024-06-28 00:51:43,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922337018] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:51:43,691 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:51:43,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-28 00:51:43,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463622850] [2024-06-28 00:51:43,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:51:43,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-28 00:51:43,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:51:43,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-28 00:51:43,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-28 00:51:43,757 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 45 [2024-06-28 00:51:43,759 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 41 transitions, 91 flow. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 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) [2024-06-28 00:51:43,760 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:51:43,760 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 45 [2024-06-28 00:51:43,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:51:43,888 INFO L124 PetriNetUnfolderBase]: 154/407 cut-off events. [2024-06-28 00:51:43,888 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2024-06-28 00:51:43,893 INFO L83 FinitePrefix]: Finished finitePrefix Result has 687 conditions, 407 events. 154/407 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 2148 event pairs, 83 based on Foata normal form. 32/415 useless extension candidates. Maximal degree in co-relation 653. Up to 252 conditions per place. [2024-06-28 00:51:43,896 INFO L140 encePairwiseOnDemand]: 38/45 looper letters, 21 selfloop transitions, 3 changer transitions 0/45 dead transitions. [2024-06-28 00:51:43,897 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 45 transitions, 150 flow [2024-06-28 00:51:43,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-28 00:51:43,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-28 00:51:43,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 97 transitions. [2024-06-28 00:51:43,909 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7185185185185186 [2024-06-28 00:51:43,911 INFO L175 Difference]: Start difference. First operand has 44 places, 41 transitions, 91 flow. Second operand 3 states and 97 transitions. [2024-06-28 00:51:43,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 45 transitions, 150 flow [2024-06-28 00:51:43,915 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 45 transitions, 144 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-28 00:51:43,922 INFO L231 Difference]: Finished difference. Result has 44 places, 41 transitions, 103 flow [2024-06-28 00:51:43,924 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=103, PETRI_PLACES=44, PETRI_TRANSITIONS=41} [2024-06-28 00:51:43,928 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 0 predicate places. [2024-06-28 00:51:43,928 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 41 transitions, 103 flow [2024-06-28 00:51:43,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 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) [2024-06-28 00:51:43,929 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:51:43,930 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:51:43,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-28 00:51:43,930 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 00:51:43,933 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:51:43,933 INFO L85 PathProgramCache]: Analyzing trace with hash -256883995, now seen corresponding path program 1 times [2024-06-28 00:51:43,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:51:43,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709145184] [2024-06-28 00:51:43,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:51:43,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:51:43,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:51:44,043 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:51:44,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:51:44,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709145184] [2024-06-28 00:51:44,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709145184] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:51:44,045 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:51:44,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-28 00:51:44,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542091376] [2024-06-28 00:51:44,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:51:44,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-28 00:51:44,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:51:44,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-28 00:51:44,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-28 00:51:44,116 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 45 [2024-06-28 00:51:44,117 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 41 transitions, 103 flow. Second operand has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:51:44,117 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:51:44,117 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 45 [2024-06-28 00:51:44,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:51:44,192 INFO L124 PetriNetUnfolderBase]: 177/445 cut-off events. [2024-06-28 00:51:44,193 INFO L125 PetriNetUnfolderBase]: For 63/63 co-relation queries the response was YES. [2024-06-28 00:51:44,194 INFO L83 FinitePrefix]: Finished finitePrefix Result has 844 conditions, 445 events. 177/445 cut-off events. For 63/63 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 2311 event pairs, 86 based on Foata normal form. 2/427 useless extension candidates. Maximal degree in co-relation 690. Up to 283 conditions per place. [2024-06-28 00:51:44,196 INFO L140 encePairwiseOnDemand]: 39/45 looper letters, 26 selfloop transitions, 5 changer transitions 0/51 dead transitions. [2024-06-28 00:51:44,196 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 51 transitions, 191 flow [2024-06-28 00:51:44,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-28 00:51:44,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-28 00:51:44,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 121 transitions. [2024-06-28 00:51:44,201 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6722222222222223 [2024-06-28 00:51:44,202 INFO L175 Difference]: Start difference. First operand has 44 places, 41 transitions, 103 flow. Second operand 4 states and 121 transitions. [2024-06-28 00:51:44,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 51 transitions, 191 flow [2024-06-28 00:51:44,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 51 transitions, 188 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-28 00:51:44,204 INFO L231 Difference]: Finished difference. Result has 47 places, 43 transitions, 127 flow [2024-06-28 00:51:44,204 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=127, PETRI_PLACES=47, PETRI_TRANSITIONS=43} [2024-06-28 00:51:44,205 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 3 predicate places. [2024-06-28 00:51:44,205 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 43 transitions, 127 flow [2024-06-28 00:51:44,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:51:44,206 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:51:44,206 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:51:44,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-28 00:51:44,209 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 00:51:44,211 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:51:44,211 INFO L85 PathProgramCache]: Analyzing trace with hash 626532082, now seen corresponding path program 1 times [2024-06-28 00:51:44,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:51:44,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139277885] [2024-06-28 00:51:44,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:51:44,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:51:44,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:51:44,303 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:51:44,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:51:44,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139277885] [2024-06-28 00:51:44,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139277885] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:51:44,304 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:51:44,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 00:51:44,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931166045] [2024-06-28 00:51:44,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:51:44,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 00:51:44,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:51:44,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 00:51:44,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-28 00:51:44,347 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 45 [2024-06-28 00:51:44,349 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 43 transitions, 127 flow. Second operand has 5 states, 5 states have (on average 22.2) internal successors, (111), 5 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:51:44,349 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:51:44,349 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 45 [2024-06-28 00:51:44,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:51:44,463 INFO L124 PetriNetUnfolderBase]: 193/445 cut-off events. [2024-06-28 00:51:44,463 INFO L125 PetriNetUnfolderBase]: For 189/189 co-relation queries the response was YES. [2024-06-28 00:51:44,464 INFO L83 FinitePrefix]: Finished finitePrefix Result has 951 conditions, 445 events. 193/445 cut-off events. For 189/189 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 2212 event pairs, 81 based on Foata normal form. 9/444 useless extension candidates. Maximal degree in co-relation 770. Up to 269 conditions per place. [2024-06-28 00:51:44,467 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 31 selfloop transitions, 8 changer transitions 0/58 dead transitions. [2024-06-28 00:51:44,467 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 58 transitions, 248 flow [2024-06-28 00:51:44,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 00:51:44,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 00:51:44,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 146 transitions. [2024-06-28 00:51:44,470 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6488888888888888 [2024-06-28 00:51:44,471 INFO L175 Difference]: Start difference. First operand has 47 places, 43 transitions, 127 flow. Second operand 5 states and 146 transitions. [2024-06-28 00:51:44,471 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 58 transitions, 248 flow [2024-06-28 00:51:44,472 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 58 transitions, 239 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-06-28 00:51:44,473 INFO L231 Difference]: Finished difference. Result has 50 places, 45 transitions, 153 flow [2024-06-28 00:51:44,474 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=153, PETRI_PLACES=50, PETRI_TRANSITIONS=45} [2024-06-28 00:51:44,474 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 6 predicate places. [2024-06-28 00:51:44,475 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 45 transitions, 153 flow [2024-06-28 00:51:44,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.2) internal successors, (111), 5 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:51:44,476 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:51:44,476 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:51:44,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-28 00:51:44,476 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 00:51:44,476 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:51:44,477 INFO L85 PathProgramCache]: Analyzing trace with hash -184907021, now seen corresponding path program 1 times [2024-06-28 00:51:44,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:51:44,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424852808] [2024-06-28 00:51:44,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:51:44,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:51:44,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:51:44,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:51:44,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:51:44,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424852808] [2024-06-28 00:51:44,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424852808] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:51:44,552 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:51:44,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-28 00:51:44,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763578388] [2024-06-28 00:51:44,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:51:44,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-28 00:51:44,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:51:44,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-28 00:51:44,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-28 00:51:44,588 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 45 [2024-06-28 00:51:44,589 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 45 transitions, 153 flow. Second operand has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:51:44,589 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:51:44,589 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 45 [2024-06-28 00:51:44,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:51:44,652 INFO L124 PetriNetUnfolderBase]: 172/406 cut-off events. [2024-06-28 00:51:44,653 INFO L125 PetriNetUnfolderBase]: For 315/325 co-relation queries the response was YES. [2024-06-28 00:51:44,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 954 conditions, 406 events. 172/406 cut-off events. For 315/325 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1987 event pairs, 77 based on Foata normal form. 1/392 useless extension candidates. Maximal degree in co-relation 822. Up to 279 conditions per place. [2024-06-28 00:51:44,655 INFO L140 encePairwiseOnDemand]: 40/45 looper letters, 26 selfloop transitions, 5 changer transitions 0/52 dead transitions. [2024-06-28 00:51:44,655 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 52 transitions, 233 flow [2024-06-28 00:51:44,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-28 00:51:44,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-28 00:51:44,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 117 transitions. [2024-06-28 00:51:44,657 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.65 [2024-06-28 00:51:44,657 INFO L175 Difference]: Start difference. First operand has 50 places, 45 transitions, 153 flow. Second operand 4 states and 117 transitions. [2024-06-28 00:51:44,657 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 52 transitions, 233 flow [2024-06-28 00:51:44,660 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 52 transitions, 221 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-28 00:51:44,662 INFO L231 Difference]: Finished difference. Result has 52 places, 47 transitions, 166 flow [2024-06-28 00:51:44,662 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=141, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=166, PETRI_PLACES=52, PETRI_TRANSITIONS=47} [2024-06-28 00:51:44,663 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 8 predicate places. [2024-06-28 00:51:44,663 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 47 transitions, 166 flow [2024-06-28 00:51:44,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:51:44,663 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:51:44,664 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:51:44,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-28 00:51:44,664 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 00:51:44,665 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:51:44,666 INFO L85 PathProgramCache]: Analyzing trace with hash -2030934318, now seen corresponding path program 1 times [2024-06-28 00:51:44,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:51:44,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027062429] [2024-06-28 00:51:44,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:51:44,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:51:44,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:51:44,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:51:44,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:51:44,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027062429] [2024-06-28 00:51:44,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027062429] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:51:44,749 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:51:44,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 00:51:44,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147009777] [2024-06-28 00:51:44,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:51:44,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 00:51:44,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:51:44,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 00:51:44,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-28 00:51:44,781 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 45 [2024-06-28 00:51:44,781 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 47 transitions, 166 flow. Second operand has 5 states, 5 states have (on average 22.8) internal successors, (114), 5 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:51:44,781 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:51:44,781 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 45 [2024-06-28 00:51:44,781 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:51:44,845 INFO L124 PetriNetUnfolderBase]: 193/433 cut-off events. [2024-06-28 00:51:44,845 INFO L125 PetriNetUnfolderBase]: For 499/514 co-relation queries the response was YES. [2024-06-28 00:51:44,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1095 conditions, 433 events. 193/433 cut-off events. For 499/514 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 2057 event pairs, 87 based on Foata normal form. 3/423 useless extension candidates. Maximal degree in co-relation 950. Up to 304 conditions per place. [2024-06-28 00:51:44,848 INFO L140 encePairwiseOnDemand]: 39/45 looper letters, 32 selfloop transitions, 10 changer transitions 0/61 dead transitions. [2024-06-28 00:51:44,848 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 61 transitions, 298 flow [2024-06-28 00:51:44,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 00:51:44,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 00:51:44,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 144 transitions. [2024-06-28 00:51:44,850 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.64 [2024-06-28 00:51:44,850 INFO L175 Difference]: Start difference. First operand has 52 places, 47 transitions, 166 flow. Second operand 5 states and 144 transitions. [2024-06-28 00:51:44,850 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 61 transitions, 298 flow [2024-06-28 00:51:44,851 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 61 transitions, 289 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-06-28 00:51:44,852 INFO L231 Difference]: Finished difference. Result has 55 places, 51 transitions, 202 flow [2024-06-28 00:51:44,852 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=157, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=202, PETRI_PLACES=55, PETRI_TRANSITIONS=51} [2024-06-28 00:51:44,862 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 11 predicate places. [2024-06-28 00:51:44,863 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 51 transitions, 202 flow [2024-06-28 00:51:44,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.8) internal successors, (114), 5 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:51:44,864 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:51:44,864 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:51:44,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-28 00:51:44,864 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 00:51:44,864 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:51:44,864 INFO L85 PathProgramCache]: Analyzing trace with hash -1585841898, now seen corresponding path program 2 times [2024-06-28 00:51:44,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:51:44,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981097694] [2024-06-28 00:51:44,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:51:44,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:51:44,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:51:44,941 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:51:44,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:51:44,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981097694] [2024-06-28 00:51:44,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981097694] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:51:44,942 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:51:44,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 00:51:44,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964105843] [2024-06-28 00:51:44,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:51:44,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 00:51:44,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:51:44,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 00:51:44,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-28 00:51:44,982 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 45 [2024-06-28 00:51:44,983 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 51 transitions, 202 flow. Second operand has 5 states, 5 states have (on average 22.8) internal successors, (114), 5 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:51:44,983 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:51:44,983 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 45 [2024-06-28 00:51:44,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:51:45,028 INFO L124 PetriNetUnfolderBase]: 192/437 cut-off events. [2024-06-28 00:51:45,028 INFO L125 PetriNetUnfolderBase]: For 748/762 co-relation queries the response was YES. [2024-06-28 00:51:45,029 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1171 conditions, 437 events. 192/437 cut-off events. For 748/762 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 2098 event pairs, 90 based on Foata normal form. 7/432 useless extension candidates. Maximal degree in co-relation 845. Up to 302 conditions per place. [2024-06-28 00:51:45,031 INFO L140 encePairwiseOnDemand]: 39/45 looper letters, 28 selfloop transitions, 10 changer transitions 0/57 dead transitions. [2024-06-28 00:51:45,031 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 57 transitions, 292 flow [2024-06-28 00:51:45,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 00:51:45,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 00:51:45,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 140 transitions. [2024-06-28 00:51:45,032 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6222222222222222 [2024-06-28 00:51:45,032 INFO L175 Difference]: Start difference. First operand has 55 places, 51 transitions, 202 flow. Second operand 5 states and 140 transitions. [2024-06-28 00:51:45,032 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 57 transitions, 292 flow [2024-06-28 00:51:45,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 57 transitions, 282 flow, removed 3 selfloop flow, removed 1 redundant places. [2024-06-28 00:51:45,034 INFO L231 Difference]: Finished difference. Result has 59 places, 51 transitions, 217 flow [2024-06-28 00:51:45,035 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=217, PETRI_PLACES=59, PETRI_TRANSITIONS=51} [2024-06-28 00:51:45,035 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 15 predicate places. [2024-06-28 00:51:45,035 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 51 transitions, 217 flow [2024-06-28 00:51:45,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.8) internal successors, (114), 5 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:51:45,036 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:51:45,036 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:51:45,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-28 00:51:45,036 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 00:51:45,036 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:51:45,036 INFO L85 PathProgramCache]: Analyzing trace with hash -2014839169, now seen corresponding path program 1 times [2024-06-28 00:51:45,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:51:45,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944730776] [2024-06-28 00:51:45,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:51:45,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:51:45,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:51:45,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:51:45,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:51:45,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944730776] [2024-06-28 00:51:45,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944730776] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:51:45,101 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:51:45,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:51:45,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888860191] [2024-06-28 00:51:45,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:51:45,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:51:45,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:51:45,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:51:45,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:51:45,144 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 45 [2024-06-28 00:51:45,145 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 51 transitions, 217 flow. Second operand has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 6 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) [2024-06-28 00:51:45,145 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:51:45,145 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 45 [2024-06-28 00:51:45,145 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:51:45,241 INFO L124 PetriNetUnfolderBase]: 268/631 cut-off events. [2024-06-28 00:51:45,241 INFO L125 PetriNetUnfolderBase]: For 1299/1314 co-relation queries the response was YES. [2024-06-28 00:51:45,243 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1702 conditions, 631 events. 268/631 cut-off events. For 1299/1314 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 3457 event pairs, 58 based on Foata normal form. 43/660 useless extension candidates. Maximal degree in co-relation 1490. Up to 212 conditions per place. [2024-06-28 00:51:45,245 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 42 selfloop transitions, 20 changer transitions 0/80 dead transitions. [2024-06-28 00:51:45,246 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 80 transitions, 456 flow [2024-06-28 00:51:45,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:51:45,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:51:45,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 180 transitions. [2024-06-28 00:51:45,247 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-06-28 00:51:45,247 INFO L175 Difference]: Start difference. First operand has 59 places, 51 transitions, 217 flow. Second operand 6 states and 180 transitions. [2024-06-28 00:51:45,247 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 80 transitions, 456 flow [2024-06-28 00:51:45,249 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 80 transitions, 431 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-06-28 00:51:45,250 INFO L231 Difference]: Finished difference. Result has 65 places, 60 transitions, 328 flow [2024-06-28 00:51:45,250 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=328, PETRI_PLACES=65, PETRI_TRANSITIONS=60} [2024-06-28 00:51:45,251 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 21 predicate places. [2024-06-28 00:51:45,251 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 60 transitions, 328 flow [2024-06-28 00:51:45,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 6 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) [2024-06-28 00:51:45,251 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:51:45,251 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:51:45,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-28 00:51:45,252 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 00:51:45,252 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:51:45,252 INFO L85 PathProgramCache]: Analyzing trace with hash -2033273521, now seen corresponding path program 2 times [2024-06-28 00:51:45,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:51:45,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366553382] [2024-06-28 00:51:45,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:51:45,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:51:45,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:51:45,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:51:45,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:51:45,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366553382] [2024-06-28 00:51:45,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366553382] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:51:45,328 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:51:45,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:51:45,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338228754] [2024-06-28 00:51:45,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:51:45,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:51:45,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:51:45,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:51:45,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:51:45,364 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 45 [2024-06-28 00:51:45,364 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 60 transitions, 328 flow. Second operand has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 6 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) [2024-06-28 00:51:45,364 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:51:45,364 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 45 [2024-06-28 00:51:45,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:51:45,454 INFO L124 PetriNetUnfolderBase]: 298/711 cut-off events. [2024-06-28 00:51:45,454 INFO L125 PetriNetUnfolderBase]: For 2376/2399 co-relation queries the response was YES. [2024-06-28 00:51:45,456 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2243 conditions, 711 events. 298/711 cut-off events. For 2376/2399 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 4059 event pairs, 63 based on Foata normal form. 16/709 useless extension candidates. Maximal degree in co-relation 2009. Up to 222 conditions per place. [2024-06-28 00:51:45,458 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 43 selfloop transitions, 22 changer transitions 0/83 dead transitions. [2024-06-28 00:51:45,459 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 83 transitions, 593 flow [2024-06-28 00:51:45,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:51:45,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:51:45,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 173 transitions. [2024-06-28 00:51:45,460 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6407407407407407 [2024-06-28 00:51:45,460 INFO L175 Difference]: Start difference. First operand has 65 places, 60 transitions, 328 flow. Second operand 6 states and 173 transitions. [2024-06-28 00:51:45,460 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 83 transitions, 593 flow [2024-06-28 00:51:45,463 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 83 transitions, 587 flow, removed 3 selfloop flow, removed 0 redundant places. [2024-06-28 00:51:45,464 INFO L231 Difference]: Finished difference. Result has 71 places, 65 transitions, 416 flow [2024-06-28 00:51:45,464 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=324, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=416, PETRI_PLACES=71, PETRI_TRANSITIONS=65} [2024-06-28 00:51:45,465 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 27 predicate places. [2024-06-28 00:51:45,466 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 65 transitions, 416 flow [2024-06-28 00:51:45,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 6 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) [2024-06-28 00:51:45,466 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:51:45,466 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:51:45,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-28 00:51:45,466 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 00:51:45,467 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:51:45,467 INFO L85 PathProgramCache]: Analyzing trace with hash -1944162307, now seen corresponding path program 3 times [2024-06-28 00:51:45,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:51:45,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394908217] [2024-06-28 00:51:45,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:51:45,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:51:45,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:51:45,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:51:45,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:51:45,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394908217] [2024-06-28 00:51:45,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394908217] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:51:45,534 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:51:45,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:51:45,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513074318] [2024-06-28 00:51:45,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:51:45,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:51:45,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:51:45,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:51:45,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:51:45,575 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 45 [2024-06-28 00:51:45,575 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 65 transitions, 416 flow. Second operand has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 6 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) [2024-06-28 00:51:45,575 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:51:45,575 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 45 [2024-06-28 00:51:45,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:51:45,662 INFO L124 PetriNetUnfolderBase]: 289/694 cut-off events. [2024-06-28 00:51:45,663 INFO L125 PetriNetUnfolderBase]: For 3034/3060 co-relation queries the response was YES. [2024-06-28 00:51:45,664 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2314 conditions, 694 events. 289/694 cut-off events. For 3034/3060 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 3934 event pairs, 56 based on Foata normal form. 10/692 useless extension candidates. Maximal degree in co-relation 1644. Up to 220 conditions per place. [2024-06-28 00:51:45,667 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 45 selfloop transitions, 19 changer transitions 0/82 dead transitions. [2024-06-28 00:51:45,667 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 82 transitions, 638 flow [2024-06-28 00:51:45,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:51:45,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:51:45,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 172 transitions. [2024-06-28 00:51:45,669 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6370370370370371 [2024-06-28 00:51:45,669 INFO L175 Difference]: Start difference. First operand has 71 places, 65 transitions, 416 flow. Second operand 6 states and 172 transitions. [2024-06-28 00:51:45,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 82 transitions, 638 flow [2024-06-28 00:51:45,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 82 transitions, 610 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-28 00:51:45,675 INFO L231 Difference]: Finished difference. Result has 75 places, 65 transitions, 432 flow [2024-06-28 00:51:45,675 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=388, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=432, PETRI_PLACES=75, PETRI_TRANSITIONS=65} [2024-06-28 00:51:45,675 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 31 predicate places. [2024-06-28 00:51:45,676 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 65 transitions, 432 flow [2024-06-28 00:51:45,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 6 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) [2024-06-28 00:51:45,677 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:51:45,678 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:51:45,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-28 00:51:45,679 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 00:51:45,679 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:51:45,679 INFO L85 PathProgramCache]: Analyzing trace with hash 361545120, now seen corresponding path program 1 times [2024-06-28 00:51:45,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:51:45,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28911569] [2024-06-28 00:51:45,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:51:45,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:51:45,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:51:45,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:51:45,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:51:45,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28911569] [2024-06-28 00:51:45,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28911569] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:51:45,764 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:51:45,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:51:45,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535414125] [2024-06-28 00:51:45,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:51:45,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:51:45,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:51:45,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:51:45,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:51:45,803 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 45 [2024-06-28 00:51:45,803 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 65 transitions, 432 flow. Second operand has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:51:45,803 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:51:45,803 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 45 [2024-06-28 00:51:45,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:51:45,894 INFO L124 PetriNetUnfolderBase]: 316/785 cut-off events. [2024-06-28 00:51:45,895 INFO L125 PetriNetUnfolderBase]: For 3765/3796 co-relation queries the response was YES. [2024-06-28 00:51:45,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2542 conditions, 785 events. 316/785 cut-off events. For 3765/3796 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 4708 event pairs, 52 based on Foata normal form. 14/788 useless extension candidates. Maximal degree in co-relation 1847. Up to 270 conditions per place. [2024-06-28 00:51:45,899 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 65 selfloop transitions, 13 changer transitions 1/97 dead transitions. [2024-06-28 00:51:45,900 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 97 transitions, 764 flow [2024-06-28 00:51:45,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:51:45,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:51:45,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 175 transitions. [2024-06-28 00:51:45,901 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6481481481481481 [2024-06-28 00:51:45,901 INFO L175 Difference]: Start difference. First operand has 75 places, 65 transitions, 432 flow. Second operand 6 states and 175 transitions. [2024-06-28 00:51:45,901 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 97 transitions, 764 flow [2024-06-28 00:51:45,906 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 97 transitions, 714 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-28 00:51:45,909 INFO L231 Difference]: Finished difference. Result has 79 places, 69 transitions, 467 flow [2024-06-28 00:51:45,909 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=381, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=467, PETRI_PLACES=79, PETRI_TRANSITIONS=69} [2024-06-28 00:51:45,910 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 35 predicate places. [2024-06-28 00:51:45,910 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 69 transitions, 467 flow [2024-06-28 00:51:45,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:51:45,911 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:51:45,911 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:51:45,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-28 00:51:45,911 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 00:51:45,911 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:51:45,912 INFO L85 PathProgramCache]: Analyzing trace with hash 1979690051, now seen corresponding path program 1 times [2024-06-28 00:51:45,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:51:45,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403977616] [2024-06-28 00:51:45,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:51:45,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:51:45,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:51:45,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:51:45,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:51:45,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403977616] [2024-06-28 00:51:45,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403977616] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:51:45,982 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:51:45,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:51:45,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356673329] [2024-06-28 00:51:45,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:51:45,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:51:45,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:51:45,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:51:45,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:51:46,018 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 45 [2024-06-28 00:51:46,018 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 69 transitions, 467 flow. Second operand has 6 states, 6 states have (on average 21.833333333333332) internal successors, (131), 6 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) [2024-06-28 00:51:46,019 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:51:46,019 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 45 [2024-06-28 00:51:46,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:51:46,104 INFO L124 PetriNetUnfolderBase]: 307/764 cut-off events. [2024-06-28 00:51:46,104 INFO L125 PetriNetUnfolderBase]: For 3998/4021 co-relation queries the response was YES. [2024-06-28 00:51:46,106 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2622 conditions, 764 events. 307/764 cut-off events. For 3998/4021 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 4511 event pairs, 81 based on Foata normal form. 18/766 useless extension candidates. Maximal degree in co-relation 2032. Up to 225 conditions per place. [2024-06-28 00:51:46,109 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 43 selfloop transitions, 26 changer transitions 0/87 dead transitions. [2024-06-28 00:51:46,109 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 87 transitions, 712 flow [2024-06-28 00:51:46,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:51:46,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:51:46,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 171 transitions. [2024-06-28 00:51:46,110 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6333333333333333 [2024-06-28 00:51:46,111 INFO L175 Difference]: Start difference. First operand has 79 places, 69 transitions, 467 flow. Second operand 6 states and 171 transitions. [2024-06-28 00:51:46,111 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 87 transitions, 712 flow [2024-06-28 00:51:46,115 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 87 transitions, 698 flow, removed 3 selfloop flow, removed 1 redundant places. [2024-06-28 00:51:46,117 INFO L231 Difference]: Finished difference. Result has 85 places, 71 transitions, 546 flow [2024-06-28 00:51:46,117 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=454, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=546, PETRI_PLACES=85, PETRI_TRANSITIONS=71} [2024-06-28 00:51:46,118 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 41 predicate places. [2024-06-28 00:51:46,118 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 71 transitions, 546 flow [2024-06-28 00:51:46,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.833333333333332) internal successors, (131), 6 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) [2024-06-28 00:51:46,118 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:51:46,118 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:51:46,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-28 00:51:46,119 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 00:51:46,119 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:51:46,119 INFO L85 PathProgramCache]: Analyzing trace with hash -139487933, now seen corresponding path program 2 times [2024-06-28 00:51:46,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:51:46,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397835093] [2024-06-28 00:51:46,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:51:46,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:51:46,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:51:46,182 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:51:46,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:51:46,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397835093] [2024-06-28 00:51:46,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397835093] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:51:46,183 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:51:46,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:51:46,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558971520] [2024-06-28 00:51:46,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:51:46,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:51:46,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:51:46,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:51:46,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:51:46,217 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 45 [2024-06-28 00:51:46,217 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 71 transitions, 546 flow. Second operand has 6 states, 6 states have (on average 21.833333333333332) internal successors, (131), 6 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) [2024-06-28 00:51:46,218 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:51:46,218 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 45 [2024-06-28 00:51:46,218 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:51:46,314 INFO L124 PetriNetUnfolderBase]: 310/779 cut-off events. [2024-06-28 00:51:46,315 INFO L125 PetriNetUnfolderBase]: For 4857/4879 co-relation queries the response was YES. [2024-06-28 00:51:46,317 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2783 conditions, 779 events. 310/779 cut-off events. For 4857/4879 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 4641 event pairs, 76 based on Foata normal form. 10/780 useless extension candidates. Maximal degree in co-relation 2064. Up to 225 conditions per place. [2024-06-28 00:51:46,320 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 47 selfloop transitions, 23 changer transitions 0/88 dead transitions. [2024-06-28 00:51:46,320 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 88 transitions, 801 flow [2024-06-28 00:51:46,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:51:46,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:51:46,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 170 transitions. [2024-06-28 00:51:46,321 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6296296296296297 [2024-06-28 00:51:46,321 INFO L175 Difference]: Start difference. First operand has 85 places, 71 transitions, 546 flow. Second operand 6 states and 170 transitions. [2024-06-28 00:51:46,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 88 transitions, 801 flow [2024-06-28 00:51:46,326 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 88 transitions, 733 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-28 00:51:46,327 INFO L231 Difference]: Finished difference. Result has 87 places, 74 transitions, 574 flow [2024-06-28 00:51:46,327 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=482, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=574, PETRI_PLACES=87, PETRI_TRANSITIONS=74} [2024-06-28 00:51:46,328 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 43 predicate places. [2024-06-28 00:51:46,328 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 74 transitions, 574 flow [2024-06-28 00:51:46,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.833333333333332) internal successors, (131), 6 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) [2024-06-28 00:51:46,328 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:51:46,328 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:51:46,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-28 00:51:46,329 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 00:51:46,329 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:51:46,329 INFO L85 PathProgramCache]: Analyzing trace with hash 1627104240, now seen corresponding path program 1 times [2024-06-28 00:51:46,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:51:46,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289456424] [2024-06-28 00:51:46,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:51:46,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:51:46,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:51:46,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:51:46,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:51:46,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289456424] [2024-06-28 00:51:46,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289456424] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:51:46,392 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:51:46,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:51:46,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971214562] [2024-06-28 00:51:46,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:51:46,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:51:46,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:51:46,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:51:46,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:51:46,434 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 45 [2024-06-28 00:51:46,435 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 74 transitions, 574 flow. Second operand has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 6 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) [2024-06-28 00:51:46,435 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:51:46,435 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 45 [2024-06-28 00:51:46,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:51:46,536 INFO L124 PetriNetUnfolderBase]: 409/952 cut-off events. [2024-06-28 00:51:46,536 INFO L125 PetriNetUnfolderBase]: For 6925/6946 co-relation queries the response was YES. [2024-06-28 00:51:46,538 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3516 conditions, 952 events. 409/952 cut-off events. For 6925/6946 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 5770 event pairs, 140 based on Foata normal form. 20/961 useless extension candidates. Maximal degree in co-relation 2933. Up to 372 conditions per place. [2024-06-28 00:51:46,542 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 57 selfloop transitions, 21 changer transitions 2/98 dead transitions. [2024-06-28 00:51:46,542 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 98 transitions, 898 flow [2024-06-28 00:51:46,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:51:46,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:51:46,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 170 transitions. [2024-06-28 00:51:46,544 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6296296296296297 [2024-06-28 00:51:46,544 INFO L175 Difference]: Start difference. First operand has 87 places, 74 transitions, 574 flow. Second operand 6 states and 170 transitions. [2024-06-28 00:51:46,544 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 98 transitions, 898 flow [2024-06-28 00:51:46,551 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 98 transitions, 849 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-28 00:51:46,552 INFO L231 Difference]: Finished difference. Result has 91 places, 79 transitions, 636 flow [2024-06-28 00:51:46,552 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=529, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=636, PETRI_PLACES=91, PETRI_TRANSITIONS=79} [2024-06-28 00:51:46,553 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 47 predicate places. [2024-06-28 00:51:46,553 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 79 transitions, 636 flow [2024-06-28 00:51:46,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 6 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) [2024-06-28 00:51:46,553 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:51:46,553 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:51:46,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-28 00:51:46,554 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 00:51:46,554 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:51:46,554 INFO L85 PathProgramCache]: Analyzing trace with hash -1605125583, now seen corresponding path program 1 times [2024-06-28 00:51:46,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:51:46,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17275630] [2024-06-28 00:51:46,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:51:46,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:51:46,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:51:46,605 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:51:46,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:51:46,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17275630] [2024-06-28 00:51:46,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17275630] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:51:46,606 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:51:46,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:51:46,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127445588] [2024-06-28 00:51:46,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:51:46,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:51:46,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:51:46,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:51:46,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:51:46,631 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 45 [2024-06-28 00:51:46,631 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 79 transitions, 636 flow. Second operand has 6 states, 6 states have (on average 22.833333333333332) internal successors, (137), 6 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:51:46,631 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:51:46,631 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 45 [2024-06-28 00:51:46,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:51:46,795 INFO L124 PetriNetUnfolderBase]: 499/1128 cut-off events. [2024-06-28 00:51:46,795 INFO L125 PetriNetUnfolderBase]: For 5785/5792 co-relation queries the response was YES. [2024-06-28 00:51:46,798 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3859 conditions, 1128 events. 499/1128 cut-off events. For 5785/5792 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 7088 event pairs, 131 based on Foata normal form. 33/1130 useless extension candidates. Maximal degree in co-relation 3286. Up to 292 conditions per place. [2024-06-28 00:51:46,802 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 63 selfloop transitions, 41 changer transitions 0/127 dead transitions. [2024-06-28 00:51:46,802 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 127 transitions, 1044 flow [2024-06-28 00:51:46,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 00:51:46,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 00:51:46,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 285 transitions. [2024-06-28 00:51:46,804 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6333333333333333 [2024-06-28 00:51:46,804 INFO L175 Difference]: Start difference. First operand has 91 places, 79 transitions, 636 flow. Second operand 10 states and 285 transitions. [2024-06-28 00:51:46,804 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 127 transitions, 1044 flow [2024-06-28 00:51:46,812 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 127 transitions, 1012 flow, removed 5 selfloop flow, removed 1 redundant places. [2024-06-28 00:51:46,814 INFO L231 Difference]: Finished difference. Result has 107 places, 95 transitions, 895 flow [2024-06-28 00:51:46,814 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=571, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=895, PETRI_PLACES=107, PETRI_TRANSITIONS=95} [2024-06-28 00:51:46,815 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 63 predicate places. [2024-06-28 00:51:46,815 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 95 transitions, 895 flow [2024-06-28 00:51:46,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.833333333333332) internal successors, (137), 6 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:51:46,815 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:51:46,815 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:51:46,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-28 00:51:46,816 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 00:51:46,816 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:51:46,816 INFO L85 PathProgramCache]: Analyzing trace with hash -1724650609, now seen corresponding path program 2 times [2024-06-28 00:51:46,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:51:46,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630932388] [2024-06-28 00:51:46,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:51:46,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:51:46,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:51:46,873 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:51:46,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:51:46,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630932388] [2024-06-28 00:51:46,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630932388] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:51:46,873 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:51:46,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:51:46,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501949097] [2024-06-28 00:51:46,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:51:46,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:51:46,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:51:46,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:51:46,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:51:46,922 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 45 [2024-06-28 00:51:46,923 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 95 transitions, 895 flow. Second operand has 6 states, 6 states have (on average 21.833333333333332) internal successors, (131), 6 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) [2024-06-28 00:51:46,923 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:51:46,923 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 45 [2024-06-28 00:51:46,923 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:51:47,052 INFO L124 PetriNetUnfolderBase]: 511/1199 cut-off events. [2024-06-28 00:51:47,052 INFO L125 PetriNetUnfolderBase]: For 11036/11074 co-relation queries the response was YES. [2024-06-28 00:51:47,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5255 conditions, 1199 events. 511/1199 cut-off events. For 11036/11074 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 7804 event pairs, 189 based on Foata normal form. 11/1191 useless extension candidates. Maximal degree in co-relation 4443. Up to 341 conditions per place. [2024-06-28 00:51:47,061 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 62 selfloop transitions, 30 changer transitions 1/120 dead transitions. [2024-06-28 00:51:47,061 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 120 transitions, 1287 flow [2024-06-28 00:51:47,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:51:47,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:51:47,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 172 transitions. [2024-06-28 00:51:47,062 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6370370370370371 [2024-06-28 00:51:47,062 INFO L175 Difference]: Start difference. First operand has 107 places, 95 transitions, 895 flow. Second operand 6 states and 172 transitions. [2024-06-28 00:51:47,063 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 120 transitions, 1287 flow [2024-06-28 00:51:47,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 120 transitions, 1287 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-06-28 00:51:47,079 INFO L231 Difference]: Finished difference. Result has 114 places, 100 transitions, 1008 flow [2024-06-28 00:51:47,080 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=895, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1008, PETRI_PLACES=114, PETRI_TRANSITIONS=100} [2024-06-28 00:51:47,080 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 70 predicate places. [2024-06-28 00:51:47,081 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 100 transitions, 1008 flow [2024-06-28 00:51:47,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.833333333333332) internal successors, (131), 6 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) [2024-06-28 00:51:47,081 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:51:47,081 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:51:47,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-28 00:51:47,081 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 00:51:47,081 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:51:47,081 INFO L85 PathProgramCache]: Analyzing trace with hash 279137903, now seen corresponding path program 3 times [2024-06-28 00:51:47,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:51:47,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796319317] [2024-06-28 00:51:47,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:51:47,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:51:47,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:51:47,138 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:51:47,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:51:47,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796319317] [2024-06-28 00:51:47,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796319317] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:51:47,140 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:51:47,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:51:47,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693920271] [2024-06-28 00:51:47,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:51:47,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:51:47,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:51:47,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:51:47,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:51:47,181 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 45 [2024-06-28 00:51:47,182 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 100 transitions, 1008 flow. Second operand has 6 states, 6 states have (on average 21.833333333333332) internal successors, (131), 6 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) [2024-06-28 00:51:47,182 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:51:47,182 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 45 [2024-06-28 00:51:47,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:51:47,319 INFO L124 PetriNetUnfolderBase]: 529/1221 cut-off events. [2024-06-28 00:51:47,319 INFO L125 PetriNetUnfolderBase]: For 12911/12971 co-relation queries the response was YES. [2024-06-28 00:51:47,323 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5693 conditions, 1221 events. 529/1221 cut-off events. For 12911/12971 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 7893 event pairs, 177 based on Foata normal form. 20/1214 useless extension candidates. Maximal degree in co-relation 4774. Up to 379 conditions per place. [2024-06-28 00:51:47,331 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 60 selfloop transitions, 31 changer transitions 2/120 dead transitions. [2024-06-28 00:51:47,331 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 120 transitions, 1366 flow [2024-06-28 00:51:47,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:51:47,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:51:47,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 172 transitions. [2024-06-28 00:51:47,332 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6370370370370371 [2024-06-28 00:51:47,332 INFO L175 Difference]: Start difference. First operand has 114 places, 100 transitions, 1008 flow. Second operand 6 states and 172 transitions. [2024-06-28 00:51:47,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 120 transitions, 1366 flow [2024-06-28 00:51:47,348 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 120 transitions, 1330 flow, removed 8 selfloop flow, removed 2 redundant places. [2024-06-28 00:51:47,350 INFO L231 Difference]: Finished difference. Result has 120 places, 101 transitions, 1089 flow [2024-06-28 00:51:47,350 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=972, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1089, PETRI_PLACES=120, PETRI_TRANSITIONS=101} [2024-06-28 00:51:47,351 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 76 predicate places. [2024-06-28 00:51:47,351 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 101 transitions, 1089 flow [2024-06-28 00:51:47,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.833333333333332) internal successors, (131), 6 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) [2024-06-28 00:51:47,351 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:51:47,351 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:51:47,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-28 00:51:47,352 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 00:51:47,352 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:51:47,352 INFO L85 PathProgramCache]: Analyzing trace with hash -2011655972, now seen corresponding path program 1 times [2024-06-28 00:51:47,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:51:47,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692143867] [2024-06-28 00:51:47,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:51:47,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:51:47,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:51:47,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:51:47,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:51:47,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692143867] [2024-06-28 00:51:47,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692143867] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:51:47,421 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:51:47,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:51:47,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795453990] [2024-06-28 00:51:47,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:51:47,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:51:47,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:51:47,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:51:47,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:51:47,463 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 45 [2024-06-28 00:51:47,463 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 101 transitions, 1089 flow. Second operand has 6 states, 6 states have (on average 21.833333333333332) internal successors, (131), 6 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) [2024-06-28 00:51:47,463 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:51:47,463 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 45 [2024-06-28 00:51:47,463 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:51:47,592 INFO L124 PetriNetUnfolderBase]: 550/1281 cut-off events. [2024-06-28 00:51:47,592 INFO L125 PetriNetUnfolderBase]: For 16321/16385 co-relation queries the response was YES. [2024-06-28 00:51:47,596 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6220 conditions, 1281 events. 550/1281 cut-off events. For 16321/16385 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 8470 event pairs, 119 based on Foata normal form. 12/1259 useless extension candidates. Maximal degree in co-relation 5995. Up to 405 conditions per place. [2024-06-28 00:51:47,605 INFO L140 encePairwiseOnDemand]: 38/45 looper letters, 69 selfloop transitions, 29 changer transitions 2/127 dead transitions. [2024-06-28 00:51:47,605 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 127 transitions, 1489 flow [2024-06-28 00:51:47,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:51:47,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:51:47,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 173 transitions. [2024-06-28 00:51:47,606 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6407407407407407 [2024-06-28 00:51:47,606 INFO L175 Difference]: Start difference. First operand has 120 places, 101 transitions, 1089 flow. Second operand 6 states and 173 transitions. [2024-06-28 00:51:47,607 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 127 transitions, 1489 flow [2024-06-28 00:51:47,624 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 127 transitions, 1449 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-28 00:51:47,626 INFO L231 Difference]: Finished difference. Result has 127 places, 104 transitions, 1196 flow [2024-06-28 00:51:47,626 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1053, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1196, PETRI_PLACES=127, PETRI_TRANSITIONS=104} [2024-06-28 00:51:47,626 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 83 predicate places. [2024-06-28 00:51:47,626 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 104 transitions, 1196 flow [2024-06-28 00:51:47,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.833333333333332) internal successors, (131), 6 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) [2024-06-28 00:51:47,627 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:51:47,627 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:51:47,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-28 00:51:47,627 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 00:51:47,627 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:51:47,627 INFO L85 PathProgramCache]: Analyzing trace with hash -944535814, now seen corresponding path program 1 times [2024-06-28 00:51:47,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:51:47,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347175987] [2024-06-28 00:51:47,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:51:47,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:51:47,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:51:47,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:51:47,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:51:47,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347175987] [2024-06-28 00:51:47,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347175987] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:51:47,682 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:51:47,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:51:47,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987727657] [2024-06-28 00:51:47,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:51:47,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:51:47,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:51:47,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:51:47,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:51:47,710 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 45 [2024-06-28 00:51:47,711 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 104 transitions, 1196 flow. Second operand has 6 states, 6 states have (on average 22.0) internal successors, (132), 6 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:51:47,711 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:51:47,711 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 45 [2024-06-28 00:51:47,711 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:51:47,868 INFO L124 PetriNetUnfolderBase]: 545/1317 cut-off events. [2024-06-28 00:51:47,868 INFO L125 PetriNetUnfolderBase]: For 19641/19695 co-relation queries the response was YES. [2024-06-28 00:51:47,872 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6529 conditions, 1317 events. 545/1317 cut-off events. For 19641/19695 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 9103 event pairs, 219 based on Foata normal form. 23/1313 useless extension candidates. Maximal degree in co-relation 5814. Up to 479 conditions per place. [2024-06-28 00:51:47,877 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 64 selfloop transitions, 35 changer transitions 0/126 dead transitions. [2024-06-28 00:51:47,877 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 126 transitions, 1572 flow [2024-06-28 00:51:47,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:51:47,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:51:47,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 173 transitions. [2024-06-28 00:51:47,878 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6407407407407407 [2024-06-28 00:51:47,878 INFO L175 Difference]: Start difference. First operand has 127 places, 104 transitions, 1196 flow. Second operand 6 states and 173 transitions. [2024-06-28 00:51:47,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 126 transitions, 1572 flow [2024-06-28 00:51:47,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 126 transitions, 1486 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-28 00:51:47,930 INFO L231 Difference]: Finished difference. Result has 130 places, 109 transitions, 1257 flow [2024-06-28 00:51:47,930 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1114, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1257, PETRI_PLACES=130, PETRI_TRANSITIONS=109} [2024-06-28 00:51:47,931 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 86 predicate places. [2024-06-28 00:51:47,931 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 109 transitions, 1257 flow [2024-06-28 00:51:47,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.0) internal successors, (132), 6 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:51:47,931 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:51:47,931 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:51:47,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-28 00:51:47,932 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 00:51:47,932 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:51:47,932 INFO L85 PathProgramCache]: Analyzing trace with hash 1629207832, now seen corresponding path program 2 times [2024-06-28 00:51:47,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:51:47,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595497350] [2024-06-28 00:51:47,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:51:47,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:51:47,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:51:47,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:51:47,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:51:47,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595497350] [2024-06-28 00:51:47,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595497350] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:51:47,982 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:51:47,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:51:47,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201471098] [2024-06-28 00:51:47,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:51:47,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:51:47,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:51:47,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:51:47,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:51:48,023 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 45 [2024-06-28 00:51:48,023 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 109 transitions, 1257 flow. Second operand has 6 states, 6 states have (on average 22.0) internal successors, (132), 6 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:51:48,023 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:51:48,023 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 45 [2024-06-28 00:51:48,023 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:51:48,156 INFO L124 PetriNetUnfolderBase]: 535/1281 cut-off events. [2024-06-28 00:51:48,157 INFO L125 PetriNetUnfolderBase]: For 19496/19555 co-relation queries the response was YES. [2024-06-28 00:51:48,161 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6513 conditions, 1281 events. 535/1281 cut-off events. For 19496/19555 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 8691 event pairs, 182 based on Foata normal form. 21/1273 useless extension candidates. Maximal degree in co-relation 5806. Up to 408 conditions per place. [2024-06-28 00:51:48,166 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 65 selfloop transitions, 36 changer transitions 1/129 dead transitions. [2024-06-28 00:51:48,166 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 129 transitions, 1652 flow [2024-06-28 00:51:48,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:51:48,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:51:48,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 173 transitions. [2024-06-28 00:51:48,167 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6407407407407407 [2024-06-28 00:51:48,167 INFO L175 Difference]: Start difference. First operand has 130 places, 109 transitions, 1257 flow. Second operand 6 states and 173 transitions. [2024-06-28 00:51:48,167 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 129 transitions, 1652 flow [2024-06-28 00:51:48,189 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 129 transitions, 1607 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-28 00:51:48,191 INFO L231 Difference]: Finished difference. Result has 135 places, 114 transitions, 1374 flow [2024-06-28 00:51:48,191 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1214, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1374, PETRI_PLACES=135, PETRI_TRANSITIONS=114} [2024-06-28 00:51:48,191 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 91 predicate places. [2024-06-28 00:51:48,191 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 114 transitions, 1374 flow [2024-06-28 00:51:48,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.0) internal successors, (132), 6 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:51:48,192 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:51:48,192 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:51:48,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-28 00:51:48,192 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 00:51:48,192 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:51:48,193 INFO L85 PathProgramCache]: Analyzing trace with hash -1668275360, now seen corresponding path program 3 times [2024-06-28 00:51:48,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:51:48,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775870152] [2024-06-28 00:51:48,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:51:48,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:51:48,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:51:48,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:51:48,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:51:48,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775870152] [2024-06-28 00:51:48,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775870152] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:51:48,227 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:51:48,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:51:48,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712263742] [2024-06-28 00:51:48,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:51:48,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:51:48,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:51:48,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:51:48,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:51:48,263 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 45 [2024-06-28 00:51:48,263 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 114 transitions, 1374 flow. Second operand has 6 states, 6 states have (on average 23.0) internal successors, (138), 6 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:51:48,263 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:51:48,263 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 45 [2024-06-28 00:51:48,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:51:48,483 INFO L124 PetriNetUnfolderBase]: 671/1508 cut-off events. [2024-06-28 00:51:48,484 INFO L125 PetriNetUnfolderBase]: For 17339/17391 co-relation queries the response was YES. [2024-06-28 00:51:48,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7063 conditions, 1508 events. 671/1508 cut-off events. For 17339/17391 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 10296 event pairs, 151 based on Foata normal form. 21/1494 useless extension candidates. Maximal degree in co-relation 6831. Up to 436 conditions per place. [2024-06-28 00:51:48,494 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 91 selfloop transitions, 43 changer transitions 2/167 dead transitions. [2024-06-28 00:51:48,494 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 167 transitions, 1960 flow [2024-06-28 00:51:48,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:51:48,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:51:48,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 238 transitions. [2024-06-28 00:51:48,496 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6611111111111111 [2024-06-28 00:51:48,496 INFO L175 Difference]: Start difference. First operand has 135 places, 114 transitions, 1374 flow. Second operand 8 states and 238 transitions. [2024-06-28 00:51:48,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 167 transitions, 1960 flow [2024-06-28 00:51:48,525 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 167 transitions, 1909 flow, removed 8 selfloop flow, removed 2 redundant places. [2024-06-28 00:51:48,527 INFO L231 Difference]: Finished difference. Result has 146 places, 130 transitions, 1633 flow [2024-06-28 00:51:48,527 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1326, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1633, PETRI_PLACES=146, PETRI_TRANSITIONS=130} [2024-06-28 00:51:48,527 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 102 predicate places. [2024-06-28 00:51:48,528 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 130 transitions, 1633 flow [2024-06-28 00:51:48,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.0) internal successors, (138), 6 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:51:48,528 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:51:48,528 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:51:48,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-28 00:51:48,528 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 00:51:48,528 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:51:48,529 INFO L85 PathProgramCache]: Analyzing trace with hash -1924559422, now seen corresponding path program 4 times [2024-06-28 00:51:48,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:51:48,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618670714] [2024-06-28 00:51:48,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:51:48,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:51:48,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:51:48,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:51:48,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:51:48,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618670714] [2024-06-28 00:51:48,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618670714] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:51:48,598 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:51:48,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:51:48,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391021054] [2024-06-28 00:51:48,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:51:48,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:51:48,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:51:48,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:51:48,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:51:48,632 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 45 [2024-06-28 00:51:48,633 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 130 transitions, 1633 flow. Second operand has 6 states, 6 states have (on average 22.0) internal successors, (132), 6 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:51:48,633 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:51:48,633 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 45 [2024-06-28 00:51:48,633 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:51:48,793 INFO L124 PetriNetUnfolderBase]: 610/1451 cut-off events. [2024-06-28 00:51:48,793 INFO L125 PetriNetUnfolderBase]: For 24906/24990 co-relation queries the response was YES. [2024-06-28 00:51:48,799 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7946 conditions, 1451 events. 610/1451 cut-off events. For 24906/24990 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 10139 event pairs, 206 based on Foata normal form. 5/1421 useless extension candidates. Maximal degree in co-relation 7047. Up to 454 conditions per place. [2024-06-28 00:51:48,805 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 71 selfloop transitions, 32 changer transitions 1/145 dead transitions. [2024-06-28 00:51:48,805 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 145 transitions, 1996 flow [2024-06-28 00:51:48,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:51:48,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:51:48,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 169 transitions. [2024-06-28 00:51:48,806 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6259259259259259 [2024-06-28 00:51:48,806 INFO L175 Difference]: Start difference. First operand has 146 places, 130 transitions, 1633 flow. Second operand 6 states and 169 transitions. [2024-06-28 00:51:48,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 145 transitions, 1996 flow [2024-06-28 00:51:48,844 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 145 transitions, 1967 flow, removed 4 selfloop flow, removed 1 redundant places. [2024-06-28 00:51:48,846 INFO L231 Difference]: Finished difference. Result has 151 places, 132 transitions, 1699 flow [2024-06-28 00:51:48,846 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1604, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1699, PETRI_PLACES=151, PETRI_TRANSITIONS=132} [2024-06-28 00:51:48,847 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 107 predicate places. [2024-06-28 00:51:48,847 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 132 transitions, 1699 flow [2024-06-28 00:51:48,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.0) internal successors, (132), 6 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:51:48,847 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:51:48,847 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:51:48,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-28 00:51:48,847 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 00:51:48,848 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:51:48,848 INFO L85 PathProgramCache]: Analyzing trace with hash 2092707574, now seen corresponding path program 5 times [2024-06-28 00:51:48,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:51:48,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740141096] [2024-06-28 00:51:48,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:51:48,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:51:48,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:51:48,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:51:48,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:51:48,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740141096] [2024-06-28 00:51:48,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740141096] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:51:48,926 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:51:48,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:51:48,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253905062] [2024-06-28 00:51:48,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:51:48,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:51:48,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:51:48,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:51:48,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:51:48,966 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 45 [2024-06-28 00:51:48,966 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 132 transitions, 1699 flow. Second operand has 6 states, 6 states have (on average 22.0) internal successors, (132), 6 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:51:48,966 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:51:48,966 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 45 [2024-06-28 00:51:48,966 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:51:49,148 INFO L124 PetriNetUnfolderBase]: 594/1425 cut-off events. [2024-06-28 00:51:49,148 INFO L125 PetriNetUnfolderBase]: For 26721/26782 co-relation queries the response was YES. [2024-06-28 00:51:49,155 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7975 conditions, 1425 events. 594/1425 cut-off events. For 26721/26782 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 9908 event pairs, 187 based on Foata normal form. 12/1406 useless extension candidates. Maximal degree in co-relation 7144. Up to 493 conditions per place. [2024-06-28 00:51:49,160 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 71 selfloop transitions, 32 changer transitions 2/146 dead transitions. [2024-06-28 00:51:49,160 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 146 transitions, 2052 flow [2024-06-28 00:51:49,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:51:49,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:51:49,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 167 transitions. [2024-06-28 00:51:49,162 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6185185185185185 [2024-06-28 00:51:49,162 INFO L175 Difference]: Start difference. First operand has 151 places, 132 transitions, 1699 flow. Second operand 6 states and 167 transitions. [2024-06-28 00:51:49,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 146 transitions, 2052 flow [2024-06-28 00:51:49,199 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 146 transitions, 1992 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-28 00:51:49,202 INFO L231 Difference]: Finished difference. Result has 155 places, 135 transitions, 1773 flow [2024-06-28 00:51:49,202 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1642, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1773, PETRI_PLACES=155, PETRI_TRANSITIONS=135} [2024-06-28 00:51:49,202 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 111 predicate places. [2024-06-28 00:51:49,202 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 135 transitions, 1773 flow [2024-06-28 00:51:49,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.0) internal successors, (132), 6 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:51:49,203 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:51:49,203 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:51:49,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-28 00:51:49,203 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 00:51:49,203 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:51:49,203 INFO L85 PathProgramCache]: Analyzing trace with hash -1467255031, now seen corresponding path program 1 times [2024-06-28 00:51:49,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:51:49,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484036823] [2024-06-28 00:51:49,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:51:49,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:51:49,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:51:49,256 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:51:49,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:51:49,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484036823] [2024-06-28 00:51:49,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484036823] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:51:49,257 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:51:49,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:51:49,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206645804] [2024-06-28 00:51:49,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:51:49,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:51:49,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:51:49,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:51:49,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:51:49,299 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 45 [2024-06-28 00:51:49,300 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 135 transitions, 1773 flow. Second operand has 6 states, 6 states have (on average 22.0) internal successors, (132), 6 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:51:49,300 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:51:49,300 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 45 [2024-06-28 00:51:49,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:51:49,533 INFO L124 PetriNetUnfolderBase]: 602/1455 cut-off events. [2024-06-28 00:51:49,533 INFO L125 PetriNetUnfolderBase]: For 30664/30738 co-relation queries the response was YES. [2024-06-28 00:51:49,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8186 conditions, 1455 events. 602/1455 cut-off events. For 30664/30738 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 10215 event pairs, 152 based on Foata normal form. 8/1436 useless extension candidates. Maximal degree in co-relation 7505. Up to 331 conditions per place. [2024-06-28 00:51:49,544 INFO L140 encePairwiseOnDemand]: 38/45 looper letters, 79 selfloop transitions, 45 changer transitions 2/167 dead transitions. [2024-06-28 00:51:49,544 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 167 transitions, 2318 flow [2024-06-28 00:51:49,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:51:49,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:51:49,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 183 transitions. [2024-06-28 00:51:49,545 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6777777777777778 [2024-06-28 00:51:49,545 INFO L175 Difference]: Start difference. First operand has 155 places, 135 transitions, 1773 flow. Second operand 6 states and 183 transitions. [2024-06-28 00:51:49,545 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 167 transitions, 2318 flow [2024-06-28 00:51:49,582 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 167 transitions, 2266 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-06-28 00:51:49,584 INFO L231 Difference]: Finished difference. Result has 160 places, 141 transitions, 1983 flow [2024-06-28 00:51:49,585 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1721, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1983, PETRI_PLACES=160, PETRI_TRANSITIONS=141} [2024-06-28 00:51:49,585 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 116 predicate places. [2024-06-28 00:51:49,585 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 141 transitions, 1983 flow [2024-06-28 00:51:49,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.0) internal successors, (132), 6 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:51:49,586 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:51:49,586 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:51:49,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-28 00:51:49,586 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 00:51:49,586 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:51:49,586 INFO L85 PathProgramCache]: Analyzing trace with hash -1956722607, now seen corresponding path program 2 times [2024-06-28 00:51:49,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:51:49,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602698292] [2024-06-28 00:51:49,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:51:49,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:51:49,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:51:49,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:51:49,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:51:49,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602698292] [2024-06-28 00:51:49,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602698292] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:51:49,635 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:51:49,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:51:49,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212831993] [2024-06-28 00:51:49,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:51:49,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:51:49,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:51:49,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:51:49,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:51:49,673 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 45 [2024-06-28 00:51:49,673 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 141 transitions, 1983 flow. Second operand has 6 states, 6 states have (on average 22.0) internal successors, (132), 6 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:51:49,674 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:51:49,674 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 45 [2024-06-28 00:51:49,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:51:49,875 INFO L124 PetriNetUnfolderBase]: 606/1462 cut-off events. [2024-06-28 00:51:49,875 INFO L125 PetriNetUnfolderBase]: For 34871/34963 co-relation queries the response was YES. [2024-06-28 00:51:49,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8574 conditions, 1462 events. 606/1462 cut-off events. For 34871/34963 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 10266 event pairs, 159 based on Foata normal form. 16/1449 useless extension candidates. Maximal degree in co-relation 7893. Up to 338 conditions per place. [2024-06-28 00:51:49,887 INFO L140 encePairwiseOnDemand]: 38/45 looper letters, 84 selfloop transitions, 39 changer transitions 3/167 dead transitions. [2024-06-28 00:51:49,888 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 167 transitions, 2434 flow [2024-06-28 00:51:49,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:51:49,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:51:49,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 178 transitions. [2024-06-28 00:51:49,889 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6592592592592592 [2024-06-28 00:51:49,889 INFO L175 Difference]: Start difference. First operand has 160 places, 141 transitions, 1983 flow. Second operand 6 states and 178 transitions. [2024-06-28 00:51:49,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 167 transitions, 2434 flow [2024-06-28 00:51:49,931 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 167 transitions, 2344 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-28 00:51:49,934 INFO L231 Difference]: Finished difference. Result has 163 places, 144 transitions, 2041 flow [2024-06-28 00:51:49,934 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1901, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2041, PETRI_PLACES=163, PETRI_TRANSITIONS=144} [2024-06-28 00:51:49,934 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 119 predicate places. [2024-06-28 00:51:49,934 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 144 transitions, 2041 flow [2024-06-28 00:51:49,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.0) internal successors, (132), 6 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:51:49,935 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:51:49,935 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:51:49,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-28 00:51:49,935 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 00:51:49,935 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:51:49,935 INFO L85 PathProgramCache]: Analyzing trace with hash -550191859, now seen corresponding path program 3 times [2024-06-28 00:51:49,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:51:49,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000026285] [2024-06-28 00:51:49,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:51:49,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:51:49,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:51:49,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:51:49,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:51:49,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000026285] [2024-06-28 00:51:49,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000026285] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:51:49,998 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:51:49,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:51:49,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819487494] [2024-06-28 00:51:49,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:51:49,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:51:49,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:51:49,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:51:49,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:51:50,037 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 45 [2024-06-28 00:51:50,038 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 144 transitions, 2041 flow. Second operand has 6 states, 6 states have (on average 22.0) internal successors, (132), 6 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:51:50,038 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:51:50,038 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 45 [2024-06-28 00:51:50,038 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:51:50,207 INFO L124 PetriNetUnfolderBase]: 606/1453 cut-off events. [2024-06-28 00:51:50,208 INFO L125 PetriNetUnfolderBase]: For 37034/37130 co-relation queries the response was YES. [2024-06-28 00:51:50,213 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8628 conditions, 1453 events. 606/1453 cut-off events. For 37034/37130 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 10131 event pairs, 184 based on Foata normal form. 12/1434 useless extension candidates. Maximal degree in co-relation 7964. Up to 616 conditions per place. [2024-06-28 00:51:50,218 INFO L140 encePairwiseOnDemand]: 39/45 looper letters, 88 selfloop transitions, 31 changer transitions 2/162 dead transitions. [2024-06-28 00:51:50,219 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 162 transitions, 2395 flow [2024-06-28 00:51:50,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:51:50,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:51:50,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 169 transitions. [2024-06-28 00:51:50,220 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6259259259259259 [2024-06-28 00:51:50,220 INFO L175 Difference]: Start difference. First operand has 163 places, 144 transitions, 2041 flow. Second operand 6 states and 169 transitions. [2024-06-28 00:51:50,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 162 transitions, 2395 flow [2024-06-28 00:51:50,259 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 162 transitions, 2367 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-06-28 00:51:50,262 INFO L231 Difference]: Finished difference. Result has 169 places, 146 transitions, 2118 flow [2024-06-28 00:51:50,262 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2014, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2118, PETRI_PLACES=169, PETRI_TRANSITIONS=146} [2024-06-28 00:51:50,263 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 125 predicate places. [2024-06-28 00:51:50,263 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 146 transitions, 2118 flow [2024-06-28 00:51:50,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.0) internal successors, (132), 6 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:51:50,263 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:51:50,263 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:51:50,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-28 00:51:50,263 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 00:51:50,264 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:51:50,264 INFO L85 PathProgramCache]: Analyzing trace with hash -914008819, now seen corresponding path program 4 times [2024-06-28 00:51:50,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:51:50,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687058743] [2024-06-28 00:51:50,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:51:50,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:51:50,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:51:50,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:51:50,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:51:50,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687058743] [2024-06-28 00:51:50,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687058743] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:51:50,299 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:51:50,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:51:50,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714373358] [2024-06-28 00:51:50,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:51:50,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:51:50,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:51:50,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:51:50,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:51:50,326 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 45 [2024-06-28 00:51:50,326 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 146 transitions, 2118 flow. Second operand has 6 states, 6 states have (on average 22.833333333333332) internal successors, (137), 6 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:51:50,326 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:51:50,326 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 45 [2024-06-28 00:51:50,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:51:50,527 INFO L124 PetriNetUnfolderBase]: 532/1225 cut-off events. [2024-06-28 00:51:50,528 INFO L125 PetriNetUnfolderBase]: For 19587/19633 co-relation queries the response was YES. [2024-06-28 00:51:50,533 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6214 conditions, 1225 events. 532/1225 cut-off events. For 19587/19633 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 7863 event pairs, 125 based on Foata normal form. 40/1241 useless extension candidates. Maximal degree in co-relation 5682. Up to 266 conditions per place. [2024-06-28 00:51:50,537 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 65 selfloop transitions, 50 changer transitions 1/163 dead transitions. [2024-06-28 00:51:50,537 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 163 transitions, 2218 flow [2024-06-28 00:51:50,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 00:51:50,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 00:51:50,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 278 transitions. [2024-06-28 00:51:50,538 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6177777777777778 [2024-06-28 00:51:50,538 INFO L175 Difference]: Start difference. First operand has 169 places, 146 transitions, 2118 flow. Second operand 10 states and 278 transitions. [2024-06-28 00:51:50,538 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 163 transitions, 2218 flow [2024-06-28 00:51:50,576 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 163 transitions, 1880 flow, removed 16 selfloop flow, removed 16 redundant places. [2024-06-28 00:51:50,578 INFO L231 Difference]: Finished difference. Result has 166 places, 134 transitions, 1735 flow [2024-06-28 00:51:50,578 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1364, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1735, PETRI_PLACES=166, PETRI_TRANSITIONS=134} [2024-06-28 00:51:50,579 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 122 predicate places. [2024-06-28 00:51:50,579 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 134 transitions, 1735 flow [2024-06-28 00:51:50,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.833333333333332) internal successors, (137), 6 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:51:50,579 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:51:50,579 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:51:50,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-28 00:51:50,579 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 00:51:50,580 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:51:50,580 INFO L85 PathProgramCache]: Analyzing trace with hash 1475122651, now seen corresponding path program 1 times [2024-06-28 00:51:50,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:51:50,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717363489] [2024-06-28 00:51:50,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:51:50,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:51:50,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:51:50,630 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:51:50,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:51:50,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717363489] [2024-06-28 00:51:50,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717363489] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:51:50,631 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:51:50,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:51:50,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671476234] [2024-06-28 00:51:50,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:51:50,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:51:50,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:51:50,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:51:50,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:51:50,664 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 45 [2024-06-28 00:51:50,665 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 134 transitions, 1735 flow. Second operand has 6 states, 6 states have (on average 22.0) internal successors, (132), 6 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:51:50,665 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:51:50,665 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 45 [2024-06-28 00:51:50,665 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:51:50,788 INFO L124 PetriNetUnfolderBase]: 411/1058 cut-off events. [2024-06-28 00:51:50,788 INFO L125 PetriNetUnfolderBase]: For 20467/20526 co-relation queries the response was YES. [2024-06-28 00:51:50,793 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5817 conditions, 1058 events. 411/1058 cut-off events. For 20467/20526 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 7037 event pairs, 101 based on Foata normal form. 6/1037 useless extension candidates. Maximal degree in co-relation 5516. Up to 335 conditions per place. [2024-06-28 00:51:50,796 INFO L140 encePairwiseOnDemand]: 38/45 looper letters, 74 selfloop transitions, 37 changer transitions 1/153 dead transitions. [2024-06-28 00:51:50,796 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 153 transitions, 2111 flow [2024-06-28 00:51:50,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:51:50,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:51:50,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 171 transitions. [2024-06-28 00:51:50,797 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6333333333333333 [2024-06-28 00:51:50,797 INFO L175 Difference]: Start difference. First operand has 166 places, 134 transitions, 1735 flow. Second operand 6 states and 171 transitions. [2024-06-28 00:51:50,797 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 153 transitions, 2111 flow [2024-06-28 00:51:50,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 153 transitions, 2051 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-06-28 00:51:50,831 INFO L231 Difference]: Finished difference. Result has 169 places, 135 transitions, 1768 flow [2024-06-28 00:51:50,832 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1676, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1768, PETRI_PLACES=169, PETRI_TRANSITIONS=135} [2024-06-28 00:51:50,832 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 125 predicate places. [2024-06-28 00:51:50,832 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 135 transitions, 1768 flow [2024-06-28 00:51:50,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.0) internal successors, (132), 6 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:51:50,833 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:51:50,833 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:51:50,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-28 00:51:50,833 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 00:51:50,833 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:51:50,833 INFO L85 PathProgramCache]: Analyzing trace with hash 1277740013, now seen corresponding path program 2 times [2024-06-28 00:51:50,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:51:50,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475265519] [2024-06-28 00:51:50,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:51:50,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:51:50,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:51:50,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:51:50,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:51:50,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475265519] [2024-06-28 00:51:50,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475265519] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:51:50,879 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:51:50,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:51:50,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591269829] [2024-06-28 00:51:50,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:51:50,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:51:50,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:51:50,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:51:50,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:51:50,918 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 45 [2024-06-28 00:51:50,919 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 135 transitions, 1768 flow. Second operand has 6 states, 6 states have (on average 22.0) internal successors, (132), 6 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:51:50,919 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:51:50,919 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 45 [2024-06-28 00:51:50,919 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:51:51,044 INFO L124 PetriNetUnfolderBase]: 419/1085 cut-off events. [2024-06-28 00:51:51,045 INFO L125 PetriNetUnfolderBase]: For 21818/21880 co-relation queries the response was YES. [2024-06-28 00:51:51,050 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5954 conditions, 1085 events. 419/1085 cut-off events. For 21818/21880 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 7241 event pairs, 74 based on Foata normal form. 8/1070 useless extension candidates. Maximal degree in co-relation 5511. Up to 339 conditions per place. [2024-06-28 00:51:51,053 INFO L140 encePairwiseOnDemand]: 38/45 looper letters, 73 selfloop transitions, 38 changer transitions 2/154 dead transitions. [2024-06-28 00:51:51,053 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 154 transitions, 2198 flow [2024-06-28 00:51:51,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:51:51,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:51:51,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 169 transitions. [2024-06-28 00:51:51,054 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6259259259259259 [2024-06-28 00:51:51,055 INFO L175 Difference]: Start difference. First operand has 169 places, 135 transitions, 1768 flow. Second operand 6 states and 169 transitions. [2024-06-28 00:51:51,055 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 154 transitions, 2198 flow [2024-06-28 00:51:51,091 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 154 transitions, 2142 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-28 00:51:51,093 INFO L231 Difference]: Finished difference. Result has 172 places, 136 transitions, 1808 flow [2024-06-28 00:51:51,094 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1713, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1808, PETRI_PLACES=172, PETRI_TRANSITIONS=136} [2024-06-28 00:51:51,094 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 128 predicate places. [2024-06-28 00:51:51,094 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 136 transitions, 1808 flow [2024-06-28 00:51:51,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.0) internal successors, (132), 6 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:51:51,094 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:51:51,095 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:51:51,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-28 00:51:51,095 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 00:51:51,095 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:51:51,095 INFO L85 PathProgramCache]: Analyzing trace with hash 1272115373, now seen corresponding path program 3 times [2024-06-28 00:51:51,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:51:51,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301961880] [2024-06-28 00:51:51,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:51:51,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:51:51,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:51:51,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:51:51,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:51:51,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301961880] [2024-06-28 00:51:51,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301961880] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:51:51,139 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:51:51,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:51:51,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370393219] [2024-06-28 00:51:51,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:51:51,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:51:51,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:51:51,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:51:51,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:51:51,181 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 45 [2024-06-28 00:51:51,182 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 136 transitions, 1808 flow. Second operand has 6 states, 6 states have (on average 22.0) internal successors, (132), 6 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:51:51,182 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:51:51,182 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 45 [2024-06-28 00:51:51,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:51:51,320 INFO L124 PetriNetUnfolderBase]: 416/1080 cut-off events. [2024-06-28 00:51:51,320 INFO L125 PetriNetUnfolderBase]: For 22743/22805 co-relation queries the response was YES. [2024-06-28 00:51:51,325 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5952 conditions, 1080 events. 416/1080 cut-off events. For 22743/22805 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 7211 event pairs, 74 based on Foata normal form. 8/1065 useless extension candidates. Maximal degree in co-relation 5506. Up to 337 conditions per place. [2024-06-28 00:51:51,328 INFO L140 encePairwiseOnDemand]: 38/45 looper letters, 70 selfloop transitions, 41 changer transitions 3/155 dead transitions. [2024-06-28 00:51:51,328 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 155 transitions, 2233 flow [2024-06-28 00:51:51,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:51:51,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:51:51,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 170 transitions. [2024-06-28 00:51:51,329 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6296296296296297 [2024-06-28 00:51:51,329 INFO L175 Difference]: Start difference. First operand has 172 places, 136 transitions, 1808 flow. Second operand 6 states and 170 transitions. [2024-06-28 00:51:51,330 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 155 transitions, 2233 flow [2024-06-28 00:51:51,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 155 transitions, 2134 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-28 00:51:51,370 INFO L231 Difference]: Finished difference. Result has 174 places, 136 transitions, 1795 flow [2024-06-28 00:51:51,370 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1709, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1795, PETRI_PLACES=174, PETRI_TRANSITIONS=136} [2024-06-28 00:51:51,371 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 130 predicate places. [2024-06-28 00:51:51,371 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 136 transitions, 1795 flow [2024-06-28 00:51:51,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.0) internal successors, (132), 6 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:51:51,371 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:51:51,371 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:51:51,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-28 00:51:51,372 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 00:51:51,372 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:51:51,372 INFO L85 PathProgramCache]: Analyzing trace with hash -1281110039, now seen corresponding path program 1 times [2024-06-28 00:51:51,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:51:51,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158594116] [2024-06-28 00:51:51,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:51:51,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:51:51,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:51:51,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:51:51,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:51:51,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158594116] [2024-06-28 00:51:51,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158594116] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:51:51,414 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:51:51,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:51:51,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302181240] [2024-06-28 00:51:51,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:51:51,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:51:51,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:51:51,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:51:51,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:51:51,446 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 45 [2024-06-28 00:51:51,447 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 136 transitions, 1795 flow. Second operand has 6 states, 6 states have (on average 22.166666666666668) internal successors, (133), 6 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:51:51,447 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:51:51,447 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 45 [2024-06-28 00:51:51,447 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:51:51,577 INFO L124 PetriNetUnfolderBase]: 432/1128 cut-off events. [2024-06-28 00:51:51,577 INFO L125 PetriNetUnfolderBase]: For 23965/24015 co-relation queries the response was YES. [2024-06-28 00:51:51,582 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6169 conditions, 1128 events. 432/1128 cut-off events. For 23965/24015 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 7649 event pairs, 55 based on Foata normal form. 8/1122 useless extension candidates. Maximal degree in co-relation 5673. Up to 295 conditions per place. [2024-06-28 00:51:51,585 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 78 selfloop transitions, 25 changer transitions 9/153 dead transitions. [2024-06-28 00:51:51,586 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 153 transitions, 2162 flow [2024-06-28 00:51:51,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:51:51,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:51:51,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 167 transitions. [2024-06-28 00:51:51,587 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6185185185185185 [2024-06-28 00:51:51,587 INFO L175 Difference]: Start difference. First operand has 174 places, 136 transitions, 1795 flow. Second operand 6 states and 167 transitions. [2024-06-28 00:51:51,587 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 153 transitions, 2162 flow [2024-06-28 00:51:51,625 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 153 transitions, 2053 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-28 00:51:51,627 INFO L231 Difference]: Finished difference. Result has 174 places, 132 transitions, 1670 flow [2024-06-28 00:51:51,627 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1686, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1670, PETRI_PLACES=174, PETRI_TRANSITIONS=132} [2024-06-28 00:51:51,628 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 130 predicate places. [2024-06-28 00:51:51,628 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 132 transitions, 1670 flow [2024-06-28 00:51:51,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.166666666666668) internal successors, (133), 6 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:51:51,628 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:51:51,628 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:51:51,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-28 00:51:51,629 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 00:51:51,629 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:51:51,629 INFO L85 PathProgramCache]: Analyzing trace with hash -468453027, now seen corresponding path program 2 times [2024-06-28 00:51:51,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:51:51,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202189391] [2024-06-28 00:51:51,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:51:51,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:51:51,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:51:51,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:51:51,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:51:51,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202189391] [2024-06-28 00:51:51,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202189391] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:51:51,676 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:51:51,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:51:51,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365406883] [2024-06-28 00:51:51,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:51:51,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:51:51,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:51:51,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:51:51,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:51:51,729 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 45 [2024-06-28 00:51:51,729 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 132 transitions, 1670 flow. Second operand has 6 states, 6 states have (on average 22.166666666666668) internal successors, (133), 6 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:51:51,729 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:51:51,729 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 45 [2024-06-28 00:51:51,730 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:51:51,855 INFO L124 PetriNetUnfolderBase]: 395/1035 cut-off events. [2024-06-28 00:51:51,855 INFO L125 PetriNetUnfolderBase]: For 23804/23857 co-relation queries the response was YES. [2024-06-28 00:51:51,860 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5476 conditions, 1035 events. 395/1035 cut-off events. For 23804/23857 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 6884 event pairs, 47 based on Foata normal form. 23/1039 useless extension candidates. Maximal degree in co-relation 5072. Up to 270 conditions per place. [2024-06-28 00:51:51,863 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 60 selfloop transitions, 43 changer transitions 3/147 dead transitions. [2024-06-28 00:51:51,863 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 147 transitions, 2024 flow [2024-06-28 00:51:51,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:51:51,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:51:51,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 168 transitions. [2024-06-28 00:51:51,864 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6222222222222222 [2024-06-28 00:51:51,864 INFO L175 Difference]: Start difference. First operand has 174 places, 132 transitions, 1670 flow. Second operand 6 states and 168 transitions. [2024-06-28 00:51:51,864 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 147 transitions, 2024 flow [2024-06-28 00:51:51,901 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 147 transitions, 1949 flow, removed 8 selfloop flow, removed 9 redundant places. [2024-06-28 00:51:51,903 INFO L231 Difference]: Finished difference. Result has 170 places, 132 transitions, 1698 flow [2024-06-28 00:51:51,904 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1603, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1698, PETRI_PLACES=170, PETRI_TRANSITIONS=132} [2024-06-28 00:51:51,904 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 126 predicate places. [2024-06-28 00:51:51,904 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 132 transitions, 1698 flow [2024-06-28 00:51:51,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.166666666666668) internal successors, (133), 6 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:51:51,904 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:51:51,905 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:51:51,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-28 00:51:51,905 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 00:51:51,905 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:51:51,905 INFO L85 PathProgramCache]: Analyzing trace with hash 1754200157, now seen corresponding path program 3 times [2024-06-28 00:51:51,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:51:51,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507588649] [2024-06-28 00:51:51,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:51:51,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:51:51,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:51:51,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:51:51,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:51:51,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507588649] [2024-06-28 00:51:51,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507588649] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:51:51,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:51:51,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:51:51,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742762826] [2024-06-28 00:51:51,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:51:51,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:51:51,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:51:51,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:51:51,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:51:51,984 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 45 [2024-06-28 00:51:51,985 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 132 transitions, 1698 flow. Second operand has 6 states, 6 states have (on average 22.166666666666668) internal successors, (133), 6 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:51:51,985 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:51:51,985 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 45 [2024-06-28 00:51:51,985 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:51:52,103 INFO L124 PetriNetUnfolderBase]: 387/1017 cut-off events. [2024-06-28 00:51:52,103 INFO L125 PetriNetUnfolderBase]: For 19776/19823 co-relation queries the response was YES. [2024-06-28 00:51:52,108 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5354 conditions, 1017 events. 387/1017 cut-off events. For 19776/19823 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 6733 event pairs, 47 based on Foata normal form. 9/1009 useless extension candidates. Maximal degree in co-relation 4959. Up to 266 conditions per place. [2024-06-28 00:51:52,110 INFO L140 encePairwiseOnDemand]: 38/45 looper letters, 77 selfloop transitions, 24 changer transitions 2/144 dead transitions. [2024-06-28 00:51:52,111 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 144 transitions, 1983 flow [2024-06-28 00:51:52,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:51:52,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:51:52,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 162 transitions. [2024-06-28 00:51:52,112 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-28 00:51:52,112 INFO L175 Difference]: Start difference. First operand has 170 places, 132 transitions, 1698 flow. Second operand 6 states and 162 transitions. [2024-06-28 00:51:52,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 144 transitions, 1983 flow [2024-06-28 00:51:52,145 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 144 transitions, 1894 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-28 00:51:52,147 INFO L231 Difference]: Finished difference. Result has 171 places, 132 transitions, 1662 flow [2024-06-28 00:51:52,148 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1609, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1662, PETRI_PLACES=171, PETRI_TRANSITIONS=132} [2024-06-28 00:51:52,148 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 127 predicate places. [2024-06-28 00:51:52,148 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 132 transitions, 1662 flow [2024-06-28 00:51:52,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.166666666666668) internal successors, (133), 6 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:51:52,148 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:51:52,148 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:51:52,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-28 00:51:52,149 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 00:51:52,149 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:51:52,149 INFO L85 PathProgramCache]: Analyzing trace with hash -1782666858, now seen corresponding path program 1 times [2024-06-28 00:51:52,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:51:52,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792890525] [2024-06-28 00:51:52,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:51:52,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:51:52,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:51:52,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:51:52,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:51:52,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792890525] [2024-06-28 00:51:52,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792890525] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:51:52,209 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:51:52,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:51:52,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146870072] [2024-06-28 00:51:52,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:51:52,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:51:52,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:51:52,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:51:52,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:51:52,249 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 45 [2024-06-28 00:51:52,249 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 132 transitions, 1662 flow. Second operand has 6 states, 6 states have (on average 22.166666666666668) internal successors, (133), 6 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:51:52,249 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:51:52,249 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 45 [2024-06-28 00:51:52,249 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:51:52,380 INFO L124 PetriNetUnfolderBase]: 385/1009 cut-off events. [2024-06-28 00:51:52,380 INFO L125 PetriNetUnfolderBase]: For 20699/20740 co-relation queries the response was YES. [2024-06-28 00:51:52,385 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5253 conditions, 1009 events. 385/1009 cut-off events. For 20699/20740 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 6706 event pairs, 90 based on Foata normal form. 18/1012 useless extension candidates. Maximal degree in co-relation 5016. Up to 223 conditions per place. [2024-06-28 00:51:52,388 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 56 selfloop transitions, 51 changer transitions 0/148 dead transitions. [2024-06-28 00:51:52,388 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 148 transitions, 1990 flow [2024-06-28 00:51:52,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:51:52,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:51:52,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 167 transitions. [2024-06-28 00:51:52,389 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6185185185185185 [2024-06-28 00:51:52,389 INFO L175 Difference]: Start difference. First operand has 171 places, 132 transitions, 1662 flow. Second operand 6 states and 167 transitions. [2024-06-28 00:51:52,389 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 148 transitions, 1990 flow [2024-06-28 00:51:52,425 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 148 transitions, 1885 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-28 00:51:52,427 INFO L231 Difference]: Finished difference. Result has 169 places, 133 transitions, 1692 flow [2024-06-28 00:51:52,427 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1559, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1692, PETRI_PLACES=169, PETRI_TRANSITIONS=133} [2024-06-28 00:51:52,427 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 125 predicate places. [2024-06-28 00:51:52,428 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 133 transitions, 1692 flow [2024-06-28 00:51:52,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.166666666666668) internal successors, (133), 6 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:51:52,428 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:51:52,428 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:51:52,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-28 00:51:52,428 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 00:51:52,429 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:51:52,429 INFO L85 PathProgramCache]: Analyzing trace with hash -1387505444, now seen corresponding path program 2 times [2024-06-28 00:51:52,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:51:52,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744795184] [2024-06-28 00:51:52,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:51:52,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:51:52,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:51:52,478 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:51:52,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:51:52,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744795184] [2024-06-28 00:51:52,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744795184] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:51:52,479 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:51:52,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:51:52,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248174374] [2024-06-28 00:51:52,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:51:52,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:51:52,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:51:52,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:51:52,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:51:52,515 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 45 [2024-06-28 00:51:52,516 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 133 transitions, 1692 flow. Second operand has 6 states, 6 states have (on average 22.166666666666668) internal successors, (133), 6 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:51:52,516 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:51:52,516 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 45 [2024-06-28 00:51:52,516 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:51:52,641 INFO L124 PetriNetUnfolderBase]: 408/1088 cut-off events. [2024-06-28 00:51:52,641 INFO L125 PetriNetUnfolderBase]: For 22837/22883 co-relation queries the response was YES. [2024-06-28 00:51:52,646 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5593 conditions, 1088 events. 408/1088 cut-off events. For 22837/22883 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 7471 event pairs, 91 based on Foata normal form. 14/1084 useless extension candidates. Maximal degree in co-relation 5356. Up to 314 conditions per place. [2024-06-28 00:51:52,649 INFO L140 encePairwiseOnDemand]: 38/45 looper letters, 80 selfloop transitions, 27 changer transitions 0/148 dead transitions. [2024-06-28 00:51:52,650 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 148 transitions, 2080 flow [2024-06-28 00:51:52,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:51:52,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:51:52,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 163 transitions. [2024-06-28 00:51:52,651 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6037037037037037 [2024-06-28 00:51:52,651 INFO L175 Difference]: Start difference. First operand has 169 places, 133 transitions, 1692 flow. Second operand 6 states and 163 transitions. [2024-06-28 00:51:52,651 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 148 transitions, 2080 flow [2024-06-28 00:51:52,691 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 148 transitions, 1975 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-28 00:51:52,693 INFO L231 Difference]: Finished difference. Result has 172 places, 135 transitions, 1691 flow [2024-06-28 00:51:52,693 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1587, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1691, PETRI_PLACES=172, PETRI_TRANSITIONS=135} [2024-06-28 00:51:52,694 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 128 predicate places. [2024-06-28 00:51:52,694 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 135 transitions, 1691 flow [2024-06-28 00:51:52,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.166666666666668) internal successors, (133), 6 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:51:52,694 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:51:52,694 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:51:52,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-28 00:51:52,695 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 00:51:52,695 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:51:52,695 INFO L85 PathProgramCache]: Analyzing trace with hash 95929876, now seen corresponding path program 3 times [2024-06-28 00:51:52,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:51:52,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003723790] [2024-06-28 00:51:52,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:51:52,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:51:52,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:51:52,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:51:52,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:51:52,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003723790] [2024-06-28 00:51:52,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003723790] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:51:52,736 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:51:52,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:51:52,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255916818] [2024-06-28 00:51:52,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:51:52,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:51:52,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:51:52,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:51:52,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:51:52,777 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 45 [2024-06-28 00:51:52,777 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 135 transitions, 1691 flow. Second operand has 6 states, 6 states have (on average 22.166666666666668) internal successors, (133), 6 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:51:52,778 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:51:52,778 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 45 [2024-06-28 00:51:52,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:51:52,916 INFO L124 PetriNetUnfolderBase]: 410/1096 cut-off events. [2024-06-28 00:51:52,916 INFO L125 PetriNetUnfolderBase]: For 20386/20437 co-relation queries the response was YES. [2024-06-28 00:51:52,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5548 conditions, 1096 events. 410/1096 cut-off events. For 20386/20437 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 7537 event pairs, 95 based on Foata normal form. 12/1092 useless extension candidates. Maximal degree in co-relation 5312. Up to 313 conditions per place. [2024-06-28 00:51:52,923 INFO L140 encePairwiseOnDemand]: 38/45 looper letters, 72 selfloop transitions, 33 changer transitions 0/146 dead transitions. [2024-06-28 00:51:52,923 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 146 transitions, 1983 flow [2024-06-28 00:51:52,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:51:52,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:51:52,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 160 transitions. [2024-06-28 00:51:52,924 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5925925925925926 [2024-06-28 00:51:52,924 INFO L175 Difference]: Start difference. First operand has 172 places, 135 transitions, 1691 flow. Second operand 6 states and 160 transitions. [2024-06-28 00:51:52,924 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 146 transitions, 1983 flow [2024-06-28 00:51:52,965 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 146 transitions, 1927 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-28 00:51:52,967 INFO L231 Difference]: Finished difference. Result has 175 places, 135 transitions, 1705 flow [2024-06-28 00:51:52,967 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1635, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1705, PETRI_PLACES=175, PETRI_TRANSITIONS=135} [2024-06-28 00:51:52,967 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 131 predicate places. [2024-06-28 00:51:52,967 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 135 transitions, 1705 flow [2024-06-28 00:51:52,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.166666666666668) internal successors, (133), 6 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:51:52,967 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:51:52,967 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:51:52,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-28 00:51:52,968 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 00:51:52,968 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:51:52,968 INFO L85 PathProgramCache]: Analyzing trace with hash 782746754, now seen corresponding path program 4 times [2024-06-28 00:51:52,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:51:52,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163671136] [2024-06-28 00:51:52,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:51:52,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:51:52,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:51:53,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:51:53,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:51:53,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163671136] [2024-06-28 00:51:53,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163671136] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:51:53,009 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:51:53,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:51:53,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941003809] [2024-06-28 00:51:53,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:51:53,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:51:53,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:51:53,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:51:53,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:51:53,049 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 45 [2024-06-28 00:51:53,050 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 135 transitions, 1705 flow. Second operand has 6 states, 6 states have (on average 22.166666666666668) internal successors, (133), 6 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:51:53,050 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:51:53,050 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 45 [2024-06-28 00:51:53,050 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:51:53,171 INFO L124 PetriNetUnfolderBase]: 414/1113 cut-off events. [2024-06-28 00:51:53,171 INFO L125 PetriNetUnfolderBase]: For 21380/21435 co-relation queries the response was YES. [2024-06-28 00:51:53,177 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5641 conditions, 1113 events. 414/1113 cut-off events. For 21380/21435 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 7694 event pairs, 108 based on Foata normal form. 7/1100 useless extension candidates. Maximal degree in co-relation 5248. Up to 377 conditions per place. [2024-06-28 00:51:53,180 INFO L140 encePairwiseOnDemand]: 39/45 looper letters, 88 selfloop transitions, 19 changer transitions 1/149 dead transitions. [2024-06-28 00:51:53,180 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 149 transitions, 2142 flow [2024-06-28 00:51:53,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:51:53,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:51:53,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 162 transitions. [2024-06-28 00:51:53,181 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-28 00:51:53,181 INFO L175 Difference]: Start difference. First operand has 175 places, 135 transitions, 1705 flow. Second operand 6 states and 162 transitions. [2024-06-28 00:51:53,181 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 149 transitions, 2142 flow [2024-06-28 00:51:53,228 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 149 transitions, 2072 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-28 00:51:53,230 INFO L231 Difference]: Finished difference. Result has 176 places, 136 transitions, 1691 flow [2024-06-28 00:51:53,231 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1635, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1691, PETRI_PLACES=176, PETRI_TRANSITIONS=136} [2024-06-28 00:51:53,231 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 132 predicate places. [2024-06-28 00:51:53,231 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 136 transitions, 1691 flow [2024-06-28 00:51:53,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.166666666666668) internal successors, (133), 6 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:51:53,231 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:51:53,231 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:51:53,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-28 00:51:53,232 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 00:51:53,232 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:51:53,232 INFO L85 PathProgramCache]: Analyzing trace with hash 955471004, now seen corresponding path program 5 times [2024-06-28 00:51:53,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:51:53,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141506760] [2024-06-28 00:51:53,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:51:53,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:51:53,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:51:53,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:51:53,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:51:53,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141506760] [2024-06-28 00:51:53,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141506760] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:51:53,278 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:51:53,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:51:53,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064117008] [2024-06-28 00:51:53,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:51:53,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:51:53,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:51:53,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:51:53,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:51:53,310 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 45 [2024-06-28 00:51:53,311 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 136 transitions, 1691 flow. Second operand has 6 states, 6 states have (on average 22.166666666666668) internal successors, (133), 6 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:51:53,311 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:51:53,311 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 45 [2024-06-28 00:51:53,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:51:53,454 INFO L124 PetriNetUnfolderBase]: 408/1099 cut-off events. [2024-06-28 00:51:53,454 INFO L125 PetriNetUnfolderBase]: For 21016/21053 co-relation queries the response was YES. [2024-06-28 00:51:53,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5337 conditions, 1099 events. 408/1099 cut-off events. For 21016/21053 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 7587 event pairs, 104 based on Foata normal form. 13/1093 useless extension candidates. Maximal degree in co-relation 4951. Up to 375 conditions per place. [2024-06-28 00:51:53,462 INFO L140 encePairwiseOnDemand]: 39/45 looper letters, 86 selfloop transitions, 20 changer transitions 1/148 dead transitions. [2024-06-28 00:51:53,462 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 148 transitions, 2054 flow [2024-06-28 00:51:53,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:51:53,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:51:53,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 160 transitions. [2024-06-28 00:51:53,464 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5925925925925926 [2024-06-28 00:51:53,464 INFO L175 Difference]: Start difference. First operand has 176 places, 136 transitions, 1691 flow. Second operand 6 states and 160 transitions. [2024-06-28 00:51:53,464 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 148 transitions, 2054 flow [2024-06-28 00:51:53,512 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 148 transitions, 1984 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-28 00:51:53,513 INFO L231 Difference]: Finished difference. Result has 177 places, 136 transitions, 1667 flow [2024-06-28 00:51:53,514 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1621, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1667, PETRI_PLACES=177, PETRI_TRANSITIONS=136} [2024-06-28 00:51:53,514 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 133 predicate places. [2024-06-28 00:51:53,514 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 136 transitions, 1667 flow [2024-06-28 00:51:53,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.166666666666668) internal successors, (133), 6 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:51:53,514 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:51:53,514 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:51:53,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-28 00:51:53,515 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 00:51:53,515 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:51:53,515 INFO L85 PathProgramCache]: Analyzing trace with hash 780872804, now seen corresponding path program 6 times [2024-06-28 00:51:53,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:51:53,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030341828] [2024-06-28 00:51:53,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:51:53,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:51:53,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:51:53,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:51:53,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:51:53,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030341828] [2024-06-28 00:51:53,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030341828] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:51:53,559 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:51:53,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:51:53,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463043756] [2024-06-28 00:51:53,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:51:53,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:51:53,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:51:53,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:51:53,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:51:53,596 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 45 [2024-06-28 00:51:53,597 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 136 transitions, 1667 flow. Second operand has 6 states, 6 states have (on average 22.166666666666668) internal successors, (133), 6 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:51:53,597 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:51:53,597 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 45 [2024-06-28 00:51:53,597 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:51:53,730 INFO L124 PetriNetUnfolderBase]: 405/1094 cut-off events. [2024-06-28 00:51:53,731 INFO L125 PetriNetUnfolderBase]: For 17460/17497 co-relation queries the response was YES. [2024-06-28 00:51:53,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5206 conditions, 1094 events. 405/1094 cut-off events. For 17460/17497 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 7541 event pairs, 102 based on Foata normal form. 7/1084 useless extension candidates. Maximal degree in co-relation 4822. Up to 373 conditions per place. [2024-06-28 00:51:53,738 INFO L140 encePairwiseOnDemand]: 39/45 looper letters, 75 selfloop transitions, 31 changer transitions 2/149 dead transitions. [2024-06-28 00:51:53,739 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 149 transitions, 2039 flow [2024-06-28 00:51:53,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:51:53,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:51:53,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 160 transitions. [2024-06-28 00:51:53,740 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5925925925925926 [2024-06-28 00:51:53,740 INFO L175 Difference]: Start difference. First operand has 177 places, 136 transitions, 1667 flow. Second operand 6 states and 160 transitions. [2024-06-28 00:51:53,740 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 149 transitions, 2039 flow [2024-06-28 00:51:53,784 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 149 transitions, 2005 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-28 00:51:53,786 INFO L231 Difference]: Finished difference. Result has 179 places, 136 transitions, 1699 flow [2024-06-28 00:51:53,786 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1633, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1699, PETRI_PLACES=179, PETRI_TRANSITIONS=136} [2024-06-28 00:51:53,786 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 135 predicate places. [2024-06-28 00:51:53,786 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 136 transitions, 1699 flow [2024-06-28 00:51:53,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.166666666666668) internal successors, (133), 6 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:51:53,787 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:51:53,787 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:51:53,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-28 00:51:53,787 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 00:51:53,787 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:51:53,787 INFO L85 PathProgramCache]: Analyzing trace with hash 1777773252, now seen corresponding path program 1 times [2024-06-28 00:51:53,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:51:53,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625283035] [2024-06-28 00:51:53,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:51:53,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:51:53,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:51:53,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:51:53,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:51:53,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625283035] [2024-06-28 00:51:53,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625283035] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:51:53,833 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:51:53,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:51:53,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571238305] [2024-06-28 00:51:53,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:51:53,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:51:53,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:51:53,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:51:53,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:51:53,879 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 45 [2024-06-28 00:51:53,880 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 136 transitions, 1699 flow. Second operand has 6 states, 6 states have (on average 22.5) internal successors, (135), 6 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:51:53,880 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:51:53,880 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 45 [2024-06-28 00:51:53,880 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:51:54,023 INFO L124 PetriNetUnfolderBase]: 395/1088 cut-off events. [2024-06-28 00:51:54,023 INFO L125 PetriNetUnfolderBase]: For 17423/17453 co-relation queries the response was YES. [2024-06-28 00:51:54,027 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5171 conditions, 1088 events. 395/1088 cut-off events. For 17423/17453 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 7575 event pairs, 122 based on Foata normal form. 9/1080 useless extension candidates. Maximal degree in co-relation 4775. Up to 345 conditions per place. [2024-06-28 00:51:54,029 INFO L140 encePairwiseOnDemand]: 38/45 looper letters, 53 selfloop transitions, 54 changer transitions 3/151 dead transitions. [2024-06-28 00:51:54,029 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 151 transitions, 2027 flow [2024-06-28 00:51:54,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:51:54,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:51:54,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 167 transitions. [2024-06-28 00:51:54,030 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6185185185185185 [2024-06-28 00:51:54,030 INFO L175 Difference]: Start difference. First operand has 179 places, 136 transitions, 1699 flow. Second operand 6 states and 167 transitions. [2024-06-28 00:51:54,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 151 transitions, 2027 flow [2024-06-28 00:51:54,070 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 151 transitions, 1952 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-28 00:51:54,072 INFO L231 Difference]: Finished difference. Result has 179 places, 136 transitions, 1736 flow [2024-06-28 00:51:54,072 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1624, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1736, PETRI_PLACES=179, PETRI_TRANSITIONS=136} [2024-06-28 00:51:54,073 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 135 predicate places. [2024-06-28 00:51:54,073 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 136 transitions, 1736 flow [2024-06-28 00:51:54,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.5) internal successors, (135), 6 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:51:54,073 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:51:54,073 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:51:54,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-28 00:51:54,073 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 00:51:54,074 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:51:54,074 INFO L85 PathProgramCache]: Analyzing trace with hash -1796847664, now seen corresponding path program 2 times [2024-06-28 00:51:54,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:51:54,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893630695] [2024-06-28 00:51:54,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:51:54,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:51:54,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:51:54,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:51:54,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:51:54,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893630695] [2024-06-28 00:51:54,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893630695] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:51:54,115 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:51:54,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:51:54,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653668449] [2024-06-28 00:51:54,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:51:54,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:51:54,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:51:54,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:51:54,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:51:54,145 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 45 [2024-06-28 00:51:54,145 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 136 transitions, 1736 flow. Second operand has 6 states, 6 states have (on average 22.5) internal successors, (135), 6 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:51:54,145 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:51:54,145 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 45 [2024-06-28 00:51:54,145 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:51:54,264 INFO L124 PetriNetUnfolderBase]: 392/1076 cut-off events. [2024-06-28 00:51:54,264 INFO L125 PetriNetUnfolderBase]: For 17216/17246 co-relation queries the response was YES. [2024-06-28 00:51:54,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5143 conditions, 1076 events. 392/1076 cut-off events. For 17216/17246 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 7492 event pairs, 125 based on Foata normal form. 5/1064 useless extension candidates. Maximal degree in co-relation 4740. Up to 339 conditions per place. [2024-06-28 00:51:54,272 INFO L140 encePairwiseOnDemand]: 39/45 looper letters, 66 selfloop transitions, 27 changer transitions 13/147 dead transitions. [2024-06-28 00:51:54,272 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 147 transitions, 1977 flow [2024-06-28 00:51:54,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:51:54,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:51:54,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 160 transitions. [2024-06-28 00:51:54,274 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5925925925925926 [2024-06-28 00:51:54,274 INFO L175 Difference]: Start difference. First operand has 179 places, 136 transitions, 1736 flow. Second operand 6 states and 160 transitions. [2024-06-28 00:51:54,274 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 147 transitions, 1977 flow [2024-06-28 00:51:54,316 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 147 transitions, 1808 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-28 00:51:54,318 INFO L231 Difference]: Finished difference. Result has 177 places, 130 transitions, 1553 flow [2024-06-28 00:51:54,319 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1567, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1553, PETRI_PLACES=177, PETRI_TRANSITIONS=130} [2024-06-28 00:51:54,319 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 133 predicate places. [2024-06-28 00:51:54,319 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 130 transitions, 1553 flow [2024-06-28 00:51:54,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.5) internal successors, (135), 6 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:51:54,319 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:51:54,320 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:51:54,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-28 00:51:54,320 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 00:51:54,320 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:51:54,320 INFO L85 PathProgramCache]: Analyzing trace with hash 1912445358, now seen corresponding path program 1 times [2024-06-28 00:51:54,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:51:54,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841779403] [2024-06-28 00:51:54,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:51:54,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:51:54,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:51:54,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:51:54,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:51:54,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841779403] [2024-06-28 00:51:54,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841779403] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:51:54,366 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:51:54,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:51:54,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282019999] [2024-06-28 00:51:54,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:51:54,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:51:54,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:51:54,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:51:54,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:51:54,400 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 45 [2024-06-28 00:51:54,400 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 130 transitions, 1553 flow. Second operand has 6 states, 6 states have (on average 22.5) internal successors, (135), 6 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:51:54,400 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:51:54,400 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 45 [2024-06-28 00:51:54,400 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:51:54,511 INFO L124 PetriNetUnfolderBase]: 357/994 cut-off events. [2024-06-28 00:51:54,511 INFO L125 PetriNetUnfolderBase]: For 14965/14998 co-relation queries the response was YES. [2024-06-28 00:51:54,515 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4525 conditions, 994 events. 357/994 cut-off events. For 14965/14998 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 6757 event pairs, 59 based on Foata normal form. 10/993 useless extension candidates. Maximal degree in co-relation 4304. Up to 161 conditions per place. [2024-06-28 00:51:54,518 INFO L140 encePairwiseOnDemand]: 38/45 looper letters, 51 selfloop transitions, 55 changer transitions 0/147 dead transitions. [2024-06-28 00:51:54,518 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 147 transitions, 1873 flow [2024-06-28 00:51:54,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:51:54,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:51:54,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 169 transitions. [2024-06-28 00:51:54,519 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6259259259259259 [2024-06-28 00:51:54,519 INFO L175 Difference]: Start difference. First operand has 177 places, 130 transitions, 1553 flow. Second operand 6 states and 169 transitions. [2024-06-28 00:51:54,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 147 transitions, 1873 flow [2024-06-28 00:51:54,555 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 147 transitions, 1790 flow, removed 8 selfloop flow, removed 10 redundant places. [2024-06-28 00:51:54,557 INFO L231 Difference]: Finished difference. Result has 168 places, 130 transitions, 1594 flow [2024-06-28 00:51:54,557 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1478, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1594, PETRI_PLACES=168, PETRI_TRANSITIONS=130} [2024-06-28 00:51:54,558 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 124 predicate places. [2024-06-28 00:51:54,558 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 130 transitions, 1594 flow [2024-06-28 00:51:54,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.5) internal successors, (135), 6 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:51:54,558 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:51:54,558 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:51:54,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-28 00:51:54,558 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 00:51:54,558 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:51:54,558 INFO L85 PathProgramCache]: Analyzing trace with hash -525861268, now seen corresponding path program 2 times [2024-06-28 00:51:54,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:51:54,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100911498] [2024-06-28 00:51:54,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:51:54,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:51:54,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:51:54,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:51:54,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:51:54,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100911498] [2024-06-28 00:51:54,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100911498] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:51:54,598 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:51:54,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:51:54,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865640041] [2024-06-28 00:51:54,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:51:54,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:51:54,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:51:54,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:51:54,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:51:54,628 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 45 [2024-06-28 00:51:54,629 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 130 transitions, 1594 flow. Second operand has 6 states, 6 states have (on average 22.5) internal successors, (135), 6 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:51:54,629 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:51:54,629 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 45 [2024-06-28 00:51:54,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:51:54,746 INFO L124 PetriNetUnfolderBase]: 364/1007 cut-off events. [2024-06-28 00:51:54,746 INFO L125 PetriNetUnfolderBase]: For 14193/14228 co-relation queries the response was YES. [2024-06-28 00:51:54,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4649 conditions, 1007 events. 364/1007 cut-off events. For 14193/14228 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 6876 event pairs, 66 based on Foata normal form. 6/1002 useless extension candidates. Maximal degree in co-relation 4425. Up to 225 conditions per place. [2024-06-28 00:51:54,753 INFO L140 encePairwiseOnDemand]: 39/45 looper letters, 66 selfloop transitions, 26 changer transitions 11/144 dead transitions. [2024-06-28 00:51:54,753 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 144 transitions, 1910 flow [2024-06-28 00:51:54,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:51:54,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:51:54,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 162 transitions. [2024-06-28 00:51:54,757 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-28 00:51:54,757 INFO L175 Difference]: Start difference. First operand has 168 places, 130 transitions, 1594 flow. Second operand 6 states and 162 transitions. [2024-06-28 00:51:54,757 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 144 transitions, 1910 flow [2024-06-28 00:51:54,794 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 144 transitions, 1757 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-28 00:51:54,796 INFO L231 Difference]: Finished difference. Result has 167 places, 124 transitions, 1434 flow [2024-06-28 00:51:54,796 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1446, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1434, PETRI_PLACES=167, PETRI_TRANSITIONS=124} [2024-06-28 00:51:54,797 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 123 predicate places. [2024-06-28 00:51:54,801 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 124 transitions, 1434 flow [2024-06-28 00:51:54,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.5) internal successors, (135), 6 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:51:54,802 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:51:54,802 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:51:54,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-28 00:51:54,802 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 00:51:54,803 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:51:54,803 INFO L85 PathProgramCache]: Analyzing trace with hash 218265558, now seen corresponding path program 3 times [2024-06-28 00:51:54,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:51:54,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527725169] [2024-06-28 00:51:54,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:51:54,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:51:54,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:51:54,876 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:51:54,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:51:54,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527725169] [2024-06-28 00:51:54,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527725169] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:51:54,878 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:51:54,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:51:54,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661371554] [2024-06-28 00:51:54,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:51:54,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:51:54,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:51:54,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:51:54,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:51:54,914 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 45 [2024-06-28 00:51:54,915 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 124 transitions, 1434 flow. Second operand has 6 states, 6 states have (on average 22.5) internal successors, (135), 6 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:51:54,915 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:51:54,915 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 45 [2024-06-28 00:51:54,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:51:55,027 INFO L124 PetriNetUnfolderBase]: 322/910 cut-off events. [2024-06-28 00:51:55,028 INFO L125 PetriNetUnfolderBase]: For 11333/11362 co-relation queries the response was YES. [2024-06-28 00:51:55,032 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3987 conditions, 910 events. 322/910 cut-off events. For 11333/11362 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 6163 event pairs, 72 based on Foata normal form. 10/906 useless extension candidates. Maximal degree in co-relation 3772. Up to 237 conditions per place. [2024-06-28 00:51:55,034 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 70 selfloop transitions, 22 changer transitions 9/142 dead transitions. [2024-06-28 00:51:55,034 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 142 transitions, 1679 flow [2024-06-28 00:51:55,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:51:55,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:51:55,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 167 transitions. [2024-06-28 00:51:55,035 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6185185185185185 [2024-06-28 00:51:55,035 INFO L175 Difference]: Start difference. First operand has 167 places, 124 transitions, 1434 flow. Second operand 6 states and 167 transitions. [2024-06-28 00:51:55,035 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 142 transitions, 1679 flow [2024-06-28 00:51:55,059 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 142 transitions, 1613 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-06-28 00:51:55,061 INFO L231 Difference]: Finished difference. Result has 159 places, 119 transitions, 1358 flow [2024-06-28 00:51:55,061 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1368, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1358, PETRI_PLACES=159, PETRI_TRANSITIONS=119} [2024-06-28 00:51:55,061 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 115 predicate places. [2024-06-28 00:51:55,061 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 119 transitions, 1358 flow [2024-06-28 00:51:55,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.5) internal successors, (135), 6 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:51:55,061 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:51:55,062 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:51:55,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-28 00:51:55,062 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 00:51:55,062 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:51:55,062 INFO L85 PathProgramCache]: Analyzing trace with hash 104787516, now seen corresponding path program 1 times [2024-06-28 00:51:55,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:51:55,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855620516] [2024-06-28 00:51:55,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:51:55,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:51:55,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:51:55,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:51:55,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:51:55,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855620516] [2024-06-28 00:51:55,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855620516] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:51:55,114 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:51:55,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:51:55,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860047427] [2024-06-28 00:51:55,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:51:55,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:51:55,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:51:55,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:51:55,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:51:55,156 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 45 [2024-06-28 00:51:55,157 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 119 transitions, 1358 flow. Second operand has 6 states, 6 states have (on average 22.666666666666668) internal successors, (136), 6 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:51:55,157 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:51:55,157 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 45 [2024-06-28 00:51:55,157 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:51:55,254 INFO L124 PetriNetUnfolderBase]: 295/822 cut-off events. [2024-06-28 00:51:55,254 INFO L125 PetriNetUnfolderBase]: For 7793/7822 co-relation queries the response was YES. [2024-06-28 00:51:55,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3538 conditions, 822 events. 295/822 cut-off events. For 7793/7822 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 5442 event pairs, 27 based on Foata normal form. 10/821 useless extension candidates. Maximal degree in co-relation 3349. Up to 243 conditions per place. [2024-06-28 00:51:55,259 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 39 selfloop transitions, 18 changer transitions 47/137 dead transitions. [2024-06-28 00:51:55,259 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 137 transitions, 1593 flow [2024-06-28 00:51:55,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:51:55,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:51:55,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 168 transitions. [2024-06-28 00:51:55,262 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6222222222222222 [2024-06-28 00:51:55,262 INFO L175 Difference]: Start difference. First operand has 159 places, 119 transitions, 1358 flow. Second operand 6 states and 168 transitions. [2024-06-28 00:51:55,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 137 transitions, 1593 flow [2024-06-28 00:51:55,280 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 137 transitions, 1515 flow, removed 6 selfloop flow, removed 12 redundant places. [2024-06-28 00:51:55,282 INFO L231 Difference]: Finished difference. Result has 149 places, 84 transitions, 882 flow [2024-06-28 00:51:55,282 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1280, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=882, PETRI_PLACES=149, PETRI_TRANSITIONS=84} [2024-06-28 00:51:55,282 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 105 predicate places. [2024-06-28 00:51:55,282 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 84 transitions, 882 flow [2024-06-28 00:51:55,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.666666666666668) internal successors, (136), 6 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:51:55,282 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:51:55,283 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:51:55,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-28 00:51:55,283 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 00:51:55,283 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:51:55,283 INFO L85 PathProgramCache]: Analyzing trace with hash -1143288428, now seen corresponding path program 2 times [2024-06-28 00:51:55,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:51:55,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829350440] [2024-06-28 00:51:55,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:51:55,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:51:55,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:51:55,338 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:51:55,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:51:55,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829350440] [2024-06-28 00:51:55,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829350440] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:51:55,338 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:51:55,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:51:55,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840424521] [2024-06-28 00:51:55,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:51:55,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:51:55,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:51:55,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:51:55,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:51:55,379 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 45 [2024-06-28 00:51:55,379 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 84 transitions, 882 flow. Second operand has 6 states, 6 states have (on average 22.666666666666668) internal successors, (136), 6 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:51:55,379 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:51:55,379 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 45 [2024-06-28 00:51:55,379 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:51:55,427 INFO L124 PetriNetUnfolderBase]: 178/499 cut-off events. [2024-06-28 00:51:55,427 INFO L125 PetriNetUnfolderBase]: For 4317/4333 co-relation queries the response was YES. [2024-06-28 00:51:55,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2091 conditions, 499 events. 178/499 cut-off events. For 4317/4333 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2842 event pairs, 23 based on Foata normal form. 4/494 useless extension candidates. Maximal degree in co-relation 2038. Up to 80 conditions per place. [2024-06-28 00:51:55,429 INFO L140 encePairwiseOnDemand]: 40/45 looper letters, 0 selfloop transitions, 0 changer transitions 90/90 dead transitions. [2024-06-28 00:51:55,429 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 90 transitions, 958 flow [2024-06-28 00:51:55,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:51:55,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:51:55,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 146 transitions. [2024-06-28 00:51:55,430 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5407407407407407 [2024-06-28 00:51:55,430 INFO L175 Difference]: Start difference. First operand has 149 places, 84 transitions, 882 flow. Second operand 6 states and 146 transitions. [2024-06-28 00:51:55,430 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 90 transitions, 958 flow [2024-06-28 00:51:55,436 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 90 transitions, 711 flow, removed 9 selfloop flow, removed 40 redundant places. [2024-06-28 00:51:55,437 INFO L231 Difference]: Finished difference. Result has 101 places, 0 transitions, 0 flow [2024-06-28 00:51:55,437 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=583, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=0, PETRI_PLACES=101, PETRI_TRANSITIONS=0} [2024-06-28 00:51:55,438 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 57 predicate places. [2024-06-28 00:51:55,438 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 0 transitions, 0 flow [2024-06-28 00:51:55,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.666666666666668) internal successors, (136), 6 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:51:55,441 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr2Err0ASSERT_VIOLATIONERROR_FUNCTION (7 of 8 remaining) [2024-06-28 00:51:55,441 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (6 of 8 remaining) [2024-06-28 00:51:55,443 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (5 of 8 remaining) [2024-06-28 00:51:55,443 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (4 of 8 remaining) [2024-06-28 00:51:55,443 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 8 remaining) [2024-06-28 00:51:55,443 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 8 remaining) [2024-06-28 00:51:55,443 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr2Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 8 remaining) [2024-06-28 00:51:55,444 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 8 remaining) [2024-06-28 00:51:55,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-28 00:51:55,444 INFO L445 BasicCegarLoop]: Path program histogram: [6, 5, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:51:55,448 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2024-06-28 00:51:55,448 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2024-06-28 00:51:55,451 INFO L507 ceAbstractionStarter]: Automizer considered 2 witness invariants [2024-06-28 00:51:55,451 INFO L508 ceAbstractionStarter]: WitnessConsidered=2 [2024-06-28 00:51:55,451 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.06 12:51:55 BasicIcfg [2024-06-28 00:51:55,451 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-06-28 00:51:55,452 INFO L158 Benchmark]: Toolchain (without parser) took 13076.03ms. Allocated memory was 148.9MB in the beginning and 450.9MB in the end (delta: 302.0MB). Free memory was 87.4MB in the beginning and 379.9MB in the end (delta: -292.4MB). Peak memory consumption was 10.8MB. Max. memory is 16.1GB. [2024-06-28 00:51:55,452 INFO L158 Benchmark]: Witness Parser took 0.16ms. Allocated memory is still 148.9MB. Free memory is still 113.4MB. There was no memory consumed. Max. memory is 16.1GB. [2024-06-28 00:51:55,452 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 148.9MB. Free memory is still 109.9MB. There was no memory consumed. Max. memory is 16.1GB. [2024-06-28 00:51:55,452 INFO L158 Benchmark]: CACSL2BoogieTranslator took 455.05ms. Allocated memory is still 148.9MB. Free memory was 87.4MB in the beginning and 61.7MB in the end (delta: 25.7MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. [2024-06-28 00:51:55,453 INFO L158 Benchmark]: Boogie Procedure Inliner took 36.30ms. Allocated memory is still 148.9MB. Free memory was 61.4MB in the beginning and 59.6MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-06-28 00:51:55,453 INFO L158 Benchmark]: Boogie Preprocessor took 26.34ms. Allocated memory is still 148.9MB. Free memory was 59.6MB in the beginning and 57.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-06-28 00:51:55,453 INFO L158 Benchmark]: RCFGBuilder took 380.63ms. Allocated memory was 148.9MB in the beginning and 255.9MB in the end (delta: 107.0MB). Free memory was 57.5MB in the beginning and 224.2MB in the end (delta: -166.7MB). Peak memory consumption was 30.1MB. Max. memory is 16.1GB. [2024-06-28 00:51:55,453 INFO L158 Benchmark]: TraceAbstraction took 12173.49ms. Allocated memory was 255.9MB in the beginning and 450.9MB in the end (delta: 195.0MB). Free memory was 223.2MB in the beginning and 379.9MB in the end (delta: -156.7MB). Peak memory consumption was 37.3MB. Max. memory is 16.1GB. [2024-06-28 00:51:55,457 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Witness Parser took 0.16ms. Allocated memory is still 148.9MB. Free memory is still 113.4MB. There was no memory consumed. Max. memory is 16.1GB. * CDTParser took 0.14ms. Allocated memory is still 148.9MB. Free memory is still 109.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 455.05ms. Allocated memory is still 148.9MB. Free memory was 87.4MB in the beginning and 61.7MB in the end (delta: 25.7MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 36.30ms. Allocated memory is still 148.9MB. Free memory was 61.4MB in the beginning and 59.6MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 26.34ms. Allocated memory is still 148.9MB. Free memory was 59.6MB in the beginning and 57.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 380.63ms. Allocated memory was 148.9MB in the beginning and 255.9MB in the end (delta: 107.0MB). Free memory was 57.5MB in the beginning and 224.2MB in the end (delta: -166.7MB). Peak memory consumption was 30.1MB. Max. memory is 16.1GB. * TraceAbstraction took 12173.49ms. Allocated memory was 255.9MB in the beginning and 450.9MB in the end (delta: 195.0MB). Free memory was 223.2MB in the beginning and 379.9MB in the end (delta: -156.7MB). Peak memory consumption was 37.3MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 753]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - PositiveResult [Line: 725]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - PositiveResult [Line: 762]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 763]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 72 locations, 8 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 12.1s, OverallIterations: 45, TraceHistogramMax: 1, PathProgramHistogramMax: 6, EmptinessCheckTime: 0.0s, AutomataDifference: 9.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 4223 SdHoareTripleChecker+Valid, 3.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2996 mSDsluCounter, 1737 SdHoareTripleChecker+Invalid, 2.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1175 mSDsCounter, 298 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 6320 IncrementalHoareTripleChecker+Invalid, 6618 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 298 mSolverCounterUnsat, 562 mSDtfsCounter, 6320 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 222 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=2118occurred in iteration=25, InterpolantAutomatonStates: 270, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 2.4s InterpolantComputationTime, 752 NumberOfCodeBlocks, 752 NumberOfCodeBlocksAsserted, 45 NumberOfCheckSat, 707 ConstructedInterpolants, 0 QuantifiedInterpolants, 3040 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 45 InterpolantComputations, 45 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 4 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2024-06-28 00:51:55,486 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE