./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe024_tso.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/protection/safe024_tso.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb4cb34f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe024_tso.i ./goblint.2024-06-19_11-23-25.files/protection/safe024_tso.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-eb4cb34-m [2024-06-21 15:56:10,725 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-21 15:56:10,801 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-21 15:56:10,807 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-21 15:56:10,808 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-21 15:56:10,858 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-21 15:56:10,858 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-21 15:56:10,859 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-21 15:56:10,860 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-21 15:56:10,863 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-21 15:56:10,864 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-21 15:56:10,864 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-21 15:56:10,865 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-21 15:56:10,866 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-21 15:56:10,867 INFO L153 SettingsManager]: * Use SBE=true [2024-06-21 15:56:10,867 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-21 15:56:10,867 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-21 15:56:10,873 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-21 15:56:10,874 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-21 15:56:10,874 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-21 15:56:10,874 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-21 15:56:10,875 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-21 15:56:10,875 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-21 15:56:10,875 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-21 15:56:10,876 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-21 15:56:10,876 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-21 15:56:10,876 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-21 15:56:10,876 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-21 15:56:10,877 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-21 15:56:10,877 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-21 15:56:10,878 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-21 15:56:10,879 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-21 15:56:10,879 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 15:56:10,879 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-21 15:56:10,879 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-21 15:56:10,879 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-21 15:56:10,880 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-21 15:56:10,881 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-21 15:56:10,881 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-21 15:56:10,881 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-21 15:56:10,882 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-21 15:56:10,882 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-21 15:56:10,882 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-21 15:56:10,882 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-21 15:56:11,128 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-21 15:56:11,148 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-21 15:56:11,150 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-21 15:56:11,152 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-21 15:56:11,156 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-21 15:56:11,157 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/safe024_tso.yml/witness.yml [2024-06-21 15:56:11,295 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-21 15:56:11,297 INFO L274 PluginConnector]: CDTParser initialized [2024-06-21 15:56:11,298 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe024_tso.i [2024-06-21 15:56:12,451 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-21 15:56:12,715 INFO L384 CDTParser]: Found 1 translation units. [2024-06-21 15:56:12,715 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe024_tso.i [2024-06-21 15:56:12,730 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/21d132b6b/b74ae6a6054f4d458ddec20d653ab623/FLAG77467d1d2 [2024-06-21 15:56:12,741 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/21d132b6b/b74ae6a6054f4d458ddec20d653ab623 [2024-06-21 15:56:12,742 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-21 15:56:12,743 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-21 15:56:12,745 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-21 15:56:12,746 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-21 15:56:12,750 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-21 15:56:12,751 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 03:56:11" (1/2) ... [2024-06-21 15:56:12,752 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@39a64f6f and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 03:56:12, skipping insertion in model container [2024-06-21 15:56:12,752 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 03:56:11" (1/2) ... [2024-06-21 15:56:12,754 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@6dd5bac and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 03:56:12, skipping insertion in model container [2024-06-21 15:56:12,755 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 03:56:12" (2/2) ... [2024-06-21 15:56:12,755 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@39a64f6f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 03:56:12, skipping insertion in model container [2024-06-21 15:56:12,755 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 03:56:12" (2/2) ... [2024-06-21 15:56:12,755 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-21 15:56:12,803 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-21 15:56:12,804 INFO L97 edCorrectnessWitness]: Location invariant before [L787-L787] ((((((! multithreaded || (y == 0 || y == 1)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) [2024-06-21 15:56:12,805 INFO L97 edCorrectnessWitness]: Location invariant before [L788-L788] ((((((! multithreaded || (y == 0 || y == 1)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) [2024-06-21 15:56:12,805 INFO L97 edCorrectnessWitness]: Location invariant before [L785-L785] ((((((! multithreaded || (y == 0 || y == 1)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) [2024-06-21 15:56:12,805 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-21 15:56:12,805 INFO L106 edCorrectnessWitness]: ghost_update [L783-L783] multithreaded = 1; [2024-06-21 15:56:12,848 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-21 15:56:13,225 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 15:56:13,235 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-21 15:56:13,326 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 15:56:13,371 INFO L206 MainTranslator]: Completed translation [2024-06-21 15:56:13,371 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 03:56:13 WrapperNode [2024-06-21 15:56:13,372 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-21 15:56:13,373 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-21 15:56:13,373 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-21 15:56:13,373 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-21 15:56:13,379 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 03:56:13" (1/1) ... [2024-06-21 15:56:13,411 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 03:56:13" (1/1) ... [2024-06-21 15:56:13,443 INFO L138 Inliner]: procedures = 175, calls = 44, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 67 [2024-06-21 15:56:13,444 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-21 15:56:13,445 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-21 15:56:13,445 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-21 15:56:13,445 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-21 15:56:13,455 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 03:56:13" (1/1) ... [2024-06-21 15:56:13,455 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 03:56:13" (1/1) ... [2024-06-21 15:56:13,466 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 03:56:13" (1/1) ... [2024-06-21 15:56:13,488 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]. [2024-06-21 15:56:13,489 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 03:56:13" (1/1) ... [2024-06-21 15:56:13,490 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 03:56:13" (1/1) ... [2024-06-21 15:56:13,500 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 03:56:13" (1/1) ... [2024-06-21 15:56:13,505 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 03:56:13" (1/1) ... [2024-06-21 15:56:13,509 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 03:56:13" (1/1) ... [2024-06-21 15:56:13,510 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 03:56:13" (1/1) ... [2024-06-21 15:56:13,512 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-21 15:56:13,518 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-21 15:56:13,518 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-21 15:56:13,518 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-21 15:56:13,519 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 03:56:13" (1/1) ... [2024-06-21 15:56:13,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 15:56:13,531 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-21 15:56:13,549 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) [2024-06-21 15:56:13,581 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 [2024-06-21 15:56:13,597 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-21 15:56:13,597 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-21 15:56:13,597 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-21 15:56:13,597 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-21 15:56:13,598 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-21 15:56:13,598 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-21 15:56:13,598 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-21 15:56:13,599 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-21 15:56:13,599 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-21 15:56:13,599 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-21 15:56:13,599 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-21 15:56:13,599 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-21 15:56:13,601 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-21 15:56:13,739 INFO L244 CfgBuilder]: Building ICFG [2024-06-21 15:56:13,742 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-21 15:56:13,925 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-21 15:56:13,926 INFO L293 CfgBuilder]: Performing block encoding [2024-06-21 15:56:14,032 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-21 15:56:14,032 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-21 15:56:14,033 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 03:56:14 BoogieIcfgContainer [2024-06-21 15:56:14,033 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-21 15:56:14,035 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-21 15:56:14,035 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-21 15:56:14,039 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-21 15:56:14,039 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 03:56:11" (1/4) ... [2024-06-21 15:56:14,040 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26479fce and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 03:56:14, skipping insertion in model container [2024-06-21 15:56:14,040 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.06 03:56:12" (2/4) ... [2024-06-21 15:56:14,040 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26479fce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 03:56:14, skipping insertion in model container [2024-06-21 15:56:14,040 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 03:56:13" (3/4) ... [2024-06-21 15:56:14,040 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26479fce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 03:56:14, skipping insertion in model container [2024-06-21 15:56:14,040 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 03:56:14" (4/4) ... [2024-06-21 15:56:14,042 INFO L112 eAbstractionObserver]: Analyzing ICFG safe024_tso.i [2024-06-21 15:56:14,057 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-21 15:56:14,057 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-21 15:56:14,057 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-21 15:56:14,140 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-21 15:56:14,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 51 places, 41 transitions, 94 flow [2024-06-21 15:56:14,233 INFO L124 PetriNetUnfolderBase]: 0/38 cut-off events. [2024-06-21 15:56:14,233 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 15:56:14,235 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48 conditions, 38 events. 0/38 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 69 event pairs, 0 based on Foata normal form. 0/35 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-21 15:56:14,235 INFO L82 GeneralOperation]: Start removeDead. Operand has 51 places, 41 transitions, 94 flow [2024-06-21 15:56:14,238 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 42 places, 32 transitions, 73 flow [2024-06-21 15:56:14,251 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-21 15:56:14,258 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;@30820535, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-21 15:56:14,258 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-21 15:56:14,262 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-21 15:56:14,262 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-21 15:56:14,262 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 15:56:14,262 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:56:14,263 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-21 15:56:14,263 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:56:14,268 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:56:14,268 INFO L85 PathProgramCache]: Analyzing trace with hash 221397332, now seen corresponding path program 1 times [2024-06-21 15:56:14,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:56:14,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747506970] [2024-06-21 15:56:14,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:56:14,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:56:14,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:56:14,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:56:14,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:56:14,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747506970] [2024-06-21 15:56:14,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747506970] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:56:14,621 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:56:14,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-21 15:56:14,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692333319] [2024-06-21 15:56:14,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:56:14,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-21 15:56:14,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:56:14,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-21 15:56:14,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-21 15:56:14,696 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 41 [2024-06-21 15:56:14,698 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 32 transitions, 73 flow. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:56:14,699 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:56:14,699 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 41 [2024-06-21 15:56:14,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:56:14,890 INFO L124 PetriNetUnfolderBase]: 470/794 cut-off events. [2024-06-21 15:56:14,891 INFO L125 PetriNetUnfolderBase]: For 23/23 co-relation queries the response was YES. [2024-06-21 15:56:14,898 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1593 conditions, 794 events. 470/794 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 3834 event pairs, 281 based on Foata normal form. 1/752 useless extension candidates. Maximal degree in co-relation 1581. Up to 736 conditions per place. [2024-06-21 15:56:14,904 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 27 selfloop transitions, 4 changer transitions 0/42 dead transitions. [2024-06-21 15:56:14,905 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 42 transitions, 161 flow [2024-06-21 15:56:14,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-21 15:56:14,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-21 15:56:14,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 88 transitions. [2024-06-21 15:56:14,916 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7154471544715447 [2024-06-21 15:56:14,918 INFO L175 Difference]: Start difference. First operand has 42 places, 32 transitions, 73 flow. Second operand 3 states and 88 transitions. [2024-06-21 15:56:14,919 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 42 transitions, 161 flow [2024-06-21 15:56:14,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 42 transitions, 156 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-21 15:56:14,924 INFO L231 Difference]: Finished difference. Result has 42 places, 35 transitions, 100 flow [2024-06-21 15:56:14,926 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=100, PETRI_PLACES=42, PETRI_TRANSITIONS=35} [2024-06-21 15:56:14,929 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 0 predicate places. [2024-06-21 15:56:14,930 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 35 transitions, 100 flow [2024-06-21 15:56:14,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:56:14,930 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:56:14,930 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:56:14,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-21 15:56:14,931 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:56:14,932 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:56:14,932 INFO L85 PathProgramCache]: Analyzing trace with hash -1985513421, now seen corresponding path program 1 times [2024-06-21 15:56:14,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:56:14,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229253471] [2024-06-21 15:56:14,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:56:14,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:56:14,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:56:15,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:56:15,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:56:15,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229253471] [2024-06-21 15:56:15,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229253471] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:56:15,130 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:56:15,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 15:56:15,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014643686] [2024-06-21 15:56:15,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:56:15,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 15:56:15,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:56:15,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 15:56:15,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-21 15:56:15,194 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 41 [2024-06-21 15:56:15,195 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 35 transitions, 100 flow. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:56:15,195 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:56:15,195 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 41 [2024-06-21 15:56:15,196 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:56:15,362 INFO L124 PetriNetUnfolderBase]: 594/1007 cut-off events. [2024-06-21 15:56:15,362 INFO L125 PetriNetUnfolderBase]: For 220/258 co-relation queries the response was YES. [2024-06-21 15:56:15,364 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2300 conditions, 1007 events. 594/1007 cut-off events. For 220/258 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 5078 event pairs, 319 based on Foata normal form. 3/985 useless extension candidates. Maximal degree in co-relation 2288. Up to 901 conditions per place. [2024-06-21 15:56:15,369 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 38 selfloop transitions, 7 changer transitions 0/55 dead transitions. [2024-06-21 15:56:15,370 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 55 transitions, 246 flow [2024-06-21 15:56:15,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 15:56:15,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 15:56:15,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 113 transitions. [2024-06-21 15:56:15,375 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6890243902439024 [2024-06-21 15:56:15,375 INFO L175 Difference]: Start difference. First operand has 42 places, 35 transitions, 100 flow. Second operand 4 states and 113 transitions. [2024-06-21 15:56:15,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 55 transitions, 246 flow [2024-06-21 15:56:15,376 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 55 transitions, 240 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-21 15:56:15,378 INFO L231 Difference]: Finished difference. Result has 46 places, 41 transitions, 152 flow [2024-06-21 15:56:15,378 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=152, PETRI_PLACES=46, PETRI_TRANSITIONS=41} [2024-06-21 15:56:15,379 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 4 predicate places. [2024-06-21 15:56:15,379 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 41 transitions, 152 flow [2024-06-21 15:56:15,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:56:15,380 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:56:15,380 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:56:15,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-21 15:56:15,380 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:56:15,381 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:56:15,381 INFO L85 PathProgramCache]: Analyzing trace with hash -350924833, now seen corresponding path program 1 times [2024-06-21 15:56:15,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:56:15,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719580771] [2024-06-21 15:56:15,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:56:15,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:56:15,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:56:15,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:56:15,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:56:15,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719580771] [2024-06-21 15:56:15,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719580771] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:56:15,523 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:56:15,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 15:56:15,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313308451] [2024-06-21 15:56:15,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:56:15,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 15:56:15,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:56:15,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 15:56:15,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-21 15:56:15,558 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 41 [2024-06-21 15:56:15,559 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 41 transitions, 152 flow. Second operand has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:56:15,559 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:56:15,560 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 41 [2024-06-21 15:56:15,560 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:56:15,720 INFO L124 PetriNetUnfolderBase]: 632/1055 cut-off events. [2024-06-21 15:56:15,720 INFO L125 PetriNetUnfolderBase]: For 583/710 co-relation queries the response was YES. [2024-06-21 15:56:15,723 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2727 conditions, 1055 events. 632/1055 cut-off events. For 583/710 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 5315 event pairs, 334 based on Foata normal form. 2/1009 useless extension candidates. Maximal degree in co-relation 2712. Up to 968 conditions per place. [2024-06-21 15:56:15,729 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 34 selfloop transitions, 9 changer transitions 0/55 dead transitions. [2024-06-21 15:56:15,729 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 55 transitions, 276 flow [2024-06-21 15:56:15,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 15:56:15,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 15:56:15,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 109 transitions. [2024-06-21 15:56:15,732 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6646341463414634 [2024-06-21 15:56:15,732 INFO L175 Difference]: Start difference. First operand has 46 places, 41 transitions, 152 flow. Second operand 4 states and 109 transitions. [2024-06-21 15:56:15,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 55 transitions, 276 flow [2024-06-21 15:56:15,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 55 transitions, 274 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-06-21 15:56:15,735 INFO L231 Difference]: Finished difference. Result has 50 places, 44 transitions, 193 flow [2024-06-21 15:56:15,735 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=193, PETRI_PLACES=50, PETRI_TRANSITIONS=44} [2024-06-21 15:56:15,736 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 8 predicate places. [2024-06-21 15:56:15,736 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 44 transitions, 193 flow [2024-06-21 15:56:15,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:56:15,736 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:56:15,736 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:56:15,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-21 15:56:15,737 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:56:15,740 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:56:15,741 INFO L85 PathProgramCache]: Analyzing trace with hash -50837007, now seen corresponding path program 1 times [2024-06-21 15:56:15,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:56:15,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261845573] [2024-06-21 15:56:15,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:56:15,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:56:15,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:56:15,965 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:56:15,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:56:15,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261845573] [2024-06-21 15:56:15,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261845573] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:56:15,971 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:56:15,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:56:15,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591376608] [2024-06-21 15:56:15,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:56:15,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:56:15,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:56:15,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:56:15,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:56:16,041 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-21 15:56:16,043 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 44 transitions, 193 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:56:16,043 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:56:16,044 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-21 15:56:16,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:56:16,212 INFO L124 PetriNetUnfolderBase]: 744/1240 cut-off events. [2024-06-21 15:56:16,213 INFO L125 PetriNetUnfolderBase]: For 1143/1153 co-relation queries the response was YES. [2024-06-21 15:56:16,216 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3517 conditions, 1240 events. 744/1240 cut-off events. For 1143/1153 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 6144 event pairs, 223 based on Foata normal form. 12/1250 useless extension candidates. Maximal degree in co-relation 3499. Up to 1078 conditions per place. [2024-06-21 15:56:16,221 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 53 selfloop transitions, 12 changer transitions 0/74 dead transitions. [2024-06-21 15:56:16,222 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 74 transitions, 405 flow [2024-06-21 15:56:16,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:56:16,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:56:16,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 158 transitions. [2024-06-21 15:56:16,223 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6422764227642277 [2024-06-21 15:56:16,224 INFO L175 Difference]: Start difference. First operand has 50 places, 44 transitions, 193 flow. Second operand 6 states and 158 transitions. [2024-06-21 15:56:16,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 74 transitions, 405 flow [2024-06-21 15:56:16,226 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 74 transitions, 388 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-21 15:56:16,227 INFO L231 Difference]: Finished difference. Result has 54 places, 48 transitions, 233 flow [2024-06-21 15:56:16,227 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=233, PETRI_PLACES=54, PETRI_TRANSITIONS=48} [2024-06-21 15:56:16,228 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 12 predicate places. [2024-06-21 15:56:16,228 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 48 transitions, 233 flow [2024-06-21 15:56:16,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:56:16,229 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:56:16,229 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:56:16,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-21 15:56:16,229 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:56:16,229 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:56:16,230 INFO L85 PathProgramCache]: Analyzing trace with hash 2043769812, now seen corresponding path program 1 times [2024-06-21 15:56:16,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:56:16,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346081029] [2024-06-21 15:56:16,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:56:16,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:56:16,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:56:16,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:56:16,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:56:16,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346081029] [2024-06-21 15:56:16,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346081029] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:56:16,380 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:56:16,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 15:56:16,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184351463] [2024-06-21 15:56:16,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:56:16,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 15:56:16,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:56:16,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 15:56:16,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 15:56:16,416 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-21 15:56:16,417 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 48 transitions, 233 flow. Second operand has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:56:16,417 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:56:16,417 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-21 15:56:16,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:56:16,563 INFO L124 PetriNetUnfolderBase]: 793/1338 cut-off events. [2024-06-21 15:56:16,564 INFO L125 PetriNetUnfolderBase]: For 2097/2109 co-relation queries the response was YES. [2024-06-21 15:56:16,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4100 conditions, 1338 events. 793/1338 cut-off events. For 2097/2109 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 6846 event pairs, 323 based on Foata normal form. 2/1320 useless extension candidates. Maximal degree in co-relation 4080. Up to 1167 conditions per place. [2024-06-21 15:56:16,574 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 49 selfloop transitions, 10 changer transitions 0/72 dead transitions. [2024-06-21 15:56:16,574 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 72 transitions, 433 flow [2024-06-21 15:56:16,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 15:56:16,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 15:56:16,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 128 transitions. [2024-06-21 15:56:16,576 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.624390243902439 [2024-06-21 15:56:16,576 INFO L175 Difference]: Start difference. First operand has 54 places, 48 transitions, 233 flow. Second operand 5 states and 128 transitions. [2024-06-21 15:56:16,577 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 72 transitions, 433 flow [2024-06-21 15:56:16,582 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 72 transitions, 404 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-21 15:56:16,585 INFO L231 Difference]: Finished difference. Result has 58 places, 57 transitions, 298 flow [2024-06-21 15:56:16,586 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=208, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=298, PETRI_PLACES=58, PETRI_TRANSITIONS=57} [2024-06-21 15:56:16,588 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 16 predicate places. [2024-06-21 15:56:16,588 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 57 transitions, 298 flow [2024-06-21 15:56:16,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:56:16,593 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:56:16,593 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:56:16,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-21 15:56:16,594 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:56:16,594 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:56:16,594 INFO L85 PathProgramCache]: Analyzing trace with hash -1036609678, now seen corresponding path program 1 times [2024-06-21 15:56:16,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:56:16,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603586759] [2024-06-21 15:56:16,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:56:16,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:56:16,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:56:16,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:56:16,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:56:16,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603586759] [2024-06-21 15:56:16,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603586759] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:56:16,762 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:56:16,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 15:56:16,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588933714] [2024-06-21 15:56:16,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:56:16,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 15:56:16,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:56:16,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 15:56:16,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 15:56:16,811 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-21 15:56:16,811 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 57 transitions, 298 flow. Second operand has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:56:16,812 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:56:16,812 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-21 15:56:16,812 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:56:16,987 INFO L124 PetriNetUnfolderBase]: 845/1403 cut-off events. [2024-06-21 15:56:16,987 INFO L125 PetriNetUnfolderBase]: For 2617/2634 co-relation queries the response was YES. [2024-06-21 15:56:16,991 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4642 conditions, 1403 events. 845/1403 cut-off events. For 2617/2634 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 7112 event pairs, 307 based on Foata normal form. 14/1404 useless extension candidates. Maximal degree in co-relation 4619. Up to 1231 conditions per place. [2024-06-21 15:56:16,999 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 56 selfloop transitions, 18 changer transitions 0/86 dead transitions. [2024-06-21 15:56:17,000 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 86 transitions, 562 flow [2024-06-21 15:56:17,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 15:56:17,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 15:56:17,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 135 transitions. [2024-06-21 15:56:17,001 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6585365853658537 [2024-06-21 15:56:17,001 INFO L175 Difference]: Start difference. First operand has 58 places, 57 transitions, 298 flow. Second operand 5 states and 135 transitions. [2024-06-21 15:56:17,001 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 86 transitions, 562 flow [2024-06-21 15:56:17,005 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 86 transitions, 558 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-06-21 15:56:17,008 INFO L231 Difference]: Finished difference. Result has 64 places, 66 transitions, 403 flow [2024-06-21 15:56:17,009 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=294, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=403, PETRI_PLACES=64, PETRI_TRANSITIONS=66} [2024-06-21 15:56:17,011 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 22 predicate places. [2024-06-21 15:56:17,012 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 66 transitions, 403 flow [2024-06-21 15:56:17,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:56:17,012 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:56:17,012 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:56:17,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-21 15:56:17,013 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:56:17,013 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:56:17,013 INFO L85 PathProgramCache]: Analyzing trace with hash -1029222688, now seen corresponding path program 2 times [2024-06-21 15:56:17,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:56:17,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25452394] [2024-06-21 15:56:17,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:56:17,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:56:17,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:56:17,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:56:17,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:56:17,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25452394] [2024-06-21 15:56:17,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25452394] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:56:17,167 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:56:17,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 15:56:17,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614077256] [2024-06-21 15:56:17,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:56:17,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 15:56:17,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:56:17,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 15:56:17,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 15:56:17,195 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-21 15:56:17,195 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 66 transitions, 403 flow. Second operand has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:56:17,195 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:56:17,196 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-21 15:56:17,196 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:56:17,410 INFO L124 PetriNetUnfolderBase]: 860/1424 cut-off events. [2024-06-21 15:56:17,411 INFO L125 PetriNetUnfolderBase]: For 3787/3806 co-relation queries the response was YES. [2024-06-21 15:56:17,416 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5202 conditions, 1424 events. 860/1424 cut-off events. For 3787/3806 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 7232 event pairs, 306 based on Foata normal form. 14/1427 useless extension candidates. Maximal degree in co-relation 5175. Up to 1256 conditions per place. [2024-06-21 15:56:17,426 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 51 selfloop transitions, 18 changer transitions 0/81 dead transitions. [2024-06-21 15:56:17,426 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 81 transitions, 579 flow [2024-06-21 15:56:17,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 15:56:17,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 15:56:17,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 130 transitions. [2024-06-21 15:56:17,428 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6341463414634146 [2024-06-21 15:56:17,428 INFO L175 Difference]: Start difference. First operand has 64 places, 66 transitions, 403 flow. Second operand 5 states and 130 transitions. [2024-06-21 15:56:17,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 81 transitions, 579 flow [2024-06-21 15:56:17,434 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 81 transitions, 559 flow, removed 10 selfloop flow, removed 0 redundant places. [2024-06-21 15:56:17,435 INFO L231 Difference]: Finished difference. Result has 69 places, 66 transitions, 428 flow [2024-06-21 15:56:17,435 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=383, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=428, PETRI_PLACES=69, PETRI_TRANSITIONS=66} [2024-06-21 15:56:17,436 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 27 predicate places. [2024-06-21 15:56:17,437 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 66 transitions, 428 flow [2024-06-21 15:56:17,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:56:17,437 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:56:17,437 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:56:17,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-21 15:56:17,438 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:56:17,438 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:56:17,438 INFO L85 PathProgramCache]: Analyzing trace with hash 1619305173, now seen corresponding path program 1 times [2024-06-21 15:56:17,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:56:17,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974126077] [2024-06-21 15:56:17,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:56:17,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:56:17,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:56:17,599 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:56:17,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:56:17,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974126077] [2024-06-21 15:56:17,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974126077] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:56:17,600 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:56:17,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:56:17,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668152034] [2024-06-21 15:56:17,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:56:17,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:56:17,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:56:17,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:56:17,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:56:17,638 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:56:17,638 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 66 transitions, 428 flow. Second operand has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:56:17,639 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:56:17,639 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:56:17,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:56:17,826 INFO L124 PetriNetUnfolderBase]: 911/1494 cut-off events. [2024-06-21 15:56:17,826 INFO L125 PetriNetUnfolderBase]: For 4561/4561 co-relation queries the response was YES. [2024-06-21 15:56:17,832 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5449 conditions, 1494 events. 911/1494 cut-off events. For 4561/4561 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 7401 event pairs, 339 based on Foata normal form. 2/1494 useless extension candidates. Maximal degree in co-relation 5419. Up to 1305 conditions per place. [2024-06-21 15:56:17,842 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 75 selfloop transitions, 20 changer transitions 0/103 dead transitions. [2024-06-21 15:56:17,844 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 103 transitions, 784 flow [2024-06-21 15:56:17,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:56:17,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:56:17,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 155 transitions. [2024-06-21 15:56:17,845 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6300813008130082 [2024-06-21 15:56:17,847 INFO L175 Difference]: Start difference. First operand has 69 places, 66 transitions, 428 flow. Second operand 6 states and 155 transitions. [2024-06-21 15:56:17,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 103 transitions, 784 flow [2024-06-21 15:56:17,855 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 103 transitions, 728 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-21 15:56:17,857 INFO L231 Difference]: Finished difference. Result has 73 places, 78 transitions, 522 flow [2024-06-21 15:56:17,857 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=387, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=522, PETRI_PLACES=73, PETRI_TRANSITIONS=78} [2024-06-21 15:56:17,859 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 31 predicate places. [2024-06-21 15:56:17,859 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 78 transitions, 522 flow [2024-06-21 15:56:17,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:56:17,860 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:56:17,860 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:56:17,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-21 15:56:17,860 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:56:17,861 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:56:17,861 INFO L85 PathProgramCache]: Analyzing trace with hash -1840864259, now seen corresponding path program 2 times [2024-06-21 15:56:17,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:56:17,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499356643] [2024-06-21 15:56:17,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:56:17,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:56:17,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:56:18,006 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:56:18,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:56:18,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499356643] [2024-06-21 15:56:18,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499356643] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:56:18,007 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:56:18,008 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:56:18,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874718055] [2024-06-21 15:56:18,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:56:18,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:56:18,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:56:18,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:56:18,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:56:18,037 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:56:18,038 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 78 transitions, 522 flow. Second operand has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:56:18,038 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:56:18,038 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:56:18,038 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:56:18,252 INFO L124 PetriNetUnfolderBase]: 922/1510 cut-off events. [2024-06-21 15:56:18,253 INFO L125 PetriNetUnfolderBase]: For 5725/5725 co-relation queries the response was YES. [2024-06-21 15:56:18,259 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5912 conditions, 1510 events. 922/1510 cut-off events. For 5725/5725 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 7513 event pairs, 338 based on Foata normal form. 2/1510 useless extension candidates. Maximal degree in co-relation 5880. Up to 1317 conditions per place. [2024-06-21 15:56:18,269 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 71 selfloop transitions, 26 changer transitions 0/105 dead transitions. [2024-06-21 15:56:18,270 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 105 transitions, 840 flow [2024-06-21 15:56:18,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:56:18,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:56:18,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 151 transitions. [2024-06-21 15:56:18,271 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6138211382113821 [2024-06-21 15:56:18,271 INFO L175 Difference]: Start difference. First operand has 73 places, 78 transitions, 522 flow. Second operand 6 states and 151 transitions. [2024-06-21 15:56:18,271 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 105 transitions, 840 flow [2024-06-21 15:56:18,282 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 105 transitions, 806 flow, removed 9 selfloop flow, removed 2 redundant places. [2024-06-21 15:56:18,286 INFO L231 Difference]: Finished difference. Result has 78 places, 84 transitions, 600 flow [2024-06-21 15:56:18,286 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=494, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=600, PETRI_PLACES=78, PETRI_TRANSITIONS=84} [2024-06-21 15:56:18,287 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 36 predicate places. [2024-06-21 15:56:18,287 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 84 transitions, 600 flow [2024-06-21 15:56:18,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:56:18,288 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:56:18,288 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:56:18,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-21 15:56:18,288 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:56:18,289 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:56:18,289 INFO L85 PathProgramCache]: Analyzing trace with hash 3684067, now seen corresponding path program 3 times [2024-06-21 15:56:18,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:56:18,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670090620] [2024-06-21 15:56:18,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:56:18,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:56:18,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:56:18,444 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:56:18,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:56:18,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670090620] [2024-06-21 15:56:18,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670090620] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:56:18,445 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:56:18,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:56:18,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079534461] [2024-06-21 15:56:18,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:56:18,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:56:18,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:56:18,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:56:18,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:56:18,480 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:56:18,481 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 84 transitions, 600 flow. Second operand has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:56:18,481 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:56:18,481 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:56:18,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:56:18,681 INFO L124 PetriNetUnfolderBase]: 917/1503 cut-off events. [2024-06-21 15:56:18,681 INFO L125 PetriNetUnfolderBase]: For 6714/6714 co-relation queries the response was YES. [2024-06-21 15:56:18,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6033 conditions, 1503 events. 917/1503 cut-off events. For 6714/6714 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 7483 event pairs, 338 based on Foata normal form. 2/1503 useless extension candidates. Maximal degree in co-relation 5999. Up to 1312 conditions per place. [2024-06-21 15:56:18,704 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 70 selfloop transitions, 25 changer transitions 0/103 dead transitions. [2024-06-21 15:56:18,704 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 103 transitions, 838 flow [2024-06-21 15:56:18,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:56:18,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:56:18,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-21 15:56:18,706 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-21 15:56:18,706 INFO L175 Difference]: Start difference. First operand has 78 places, 84 transitions, 600 flow. Second operand 6 states and 150 transitions. [2024-06-21 15:56:18,706 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 103 transitions, 838 flow [2024-06-21 15:56:18,720 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 103 transitions, 810 flow, removed 4 selfloop flow, removed 1 redundant places. [2024-06-21 15:56:18,722 INFO L231 Difference]: Finished difference. Result has 83 places, 84 transitions, 630 flow [2024-06-21 15:56:18,723 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=572, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=630, PETRI_PLACES=83, PETRI_TRANSITIONS=84} [2024-06-21 15:56:18,724 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 41 predicate places. [2024-06-21 15:56:18,724 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 84 transitions, 630 flow [2024-06-21 15:56:18,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:56:18,725 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:56:18,725 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:56:18,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-21 15:56:18,725 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:56:18,726 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:56:18,726 INFO L85 PathProgramCache]: Analyzing trace with hash -450221025, now seen corresponding path program 1 times [2024-06-21 15:56:18,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:56:18,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85648597] [2024-06-21 15:56:18,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:56:18,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:56:18,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:56:18,892 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:56:18,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:56:18,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85648597] [2024-06-21 15:56:18,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85648597] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:56:18,893 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:56:18,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:56:18,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847121821] [2024-06-21 15:56:18,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:56:18,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:56:18,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:56:18,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:56:18,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:56:18,935 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-21 15:56:18,935 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 84 transitions, 630 flow. Second operand has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:56:18,936 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:56:18,936 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-21 15:56:18,936 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:56:19,128 INFO L124 PetriNetUnfolderBase]: 848/1431 cut-off events. [2024-06-21 15:56:19,128 INFO L125 PetriNetUnfolderBase]: For 8389/8389 co-relation queries the response was YES. [2024-06-21 15:56:19,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5885 conditions, 1431 events. 848/1431 cut-off events. For 8389/8389 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 7258 event pairs, 290 based on Foata normal form. 4/1420 useless extension candidates. Maximal degree in co-relation 5849. Up to 1217 conditions per place. [2024-06-21 15:56:19,144 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 78 selfloop transitions, 12 changer transitions 0/106 dead transitions. [2024-06-21 15:56:19,144 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 106 transitions, 872 flow [2024-06-21 15:56:19,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:56:19,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:56:19,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 151 transitions. [2024-06-21 15:56:19,146 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6138211382113821 [2024-06-21 15:56:19,146 INFO L175 Difference]: Start difference. First operand has 83 places, 84 transitions, 630 flow. Second operand 6 states and 151 transitions. [2024-06-21 15:56:19,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 106 transitions, 872 flow [2024-06-21 15:56:19,157 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 106 transitions, 822 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-21 15:56:19,159 INFO L231 Difference]: Finished difference. Result has 85 places, 86 transitions, 627 flow [2024-06-21 15:56:19,160 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=580, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=627, PETRI_PLACES=85, PETRI_TRANSITIONS=86} [2024-06-21 15:56:19,160 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 43 predicate places. [2024-06-21 15:56:19,160 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 86 transitions, 627 flow [2024-06-21 15:56:19,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:56:19,161 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:56:19,161 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:56:19,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-21 15:56:19,161 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:56:19,161 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:56:19,162 INFO L85 PathProgramCache]: Analyzing trace with hash 254524877, now seen corresponding path program 1 times [2024-06-21 15:56:19,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:56:19,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638919864] [2024-06-21 15:56:19,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:56:19,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:56:19,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:56:19,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:56:19,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:56:19,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638919864] [2024-06-21 15:56:19,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638919864] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:56:19,305 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:56:19,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:56:19,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355073243] [2024-06-21 15:56:19,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:56:19,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:56:19,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:56:19,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:56:19,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:56:19,347 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-21 15:56:19,349 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 86 transitions, 627 flow. Second operand has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:56:19,349 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:56:19,349 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-21 15:56:19,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:56:19,582 INFO L124 PetriNetUnfolderBase]: 875/1466 cut-off events. [2024-06-21 15:56:19,582 INFO L125 PetriNetUnfolderBase]: For 9843/9864 co-relation queries the response was YES. [2024-06-21 15:56:19,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6243 conditions, 1466 events. 875/1466 cut-off events. For 9843/9864 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 7567 event pairs, 275 based on Foata normal form. 17/1439 useless extension candidates. Maximal degree in co-relation 6206. Up to 1250 conditions per place. [2024-06-21 15:56:19,594 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 78 selfloop transitions, 17 changer transitions 0/114 dead transitions. [2024-06-21 15:56:19,594 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 114 transitions, 899 flow [2024-06-21 15:56:19,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:56:19,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:56:19,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 157 transitions. [2024-06-21 15:56:19,595 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6382113821138211 [2024-06-21 15:56:19,596 INFO L175 Difference]: Start difference. First operand has 85 places, 86 transitions, 627 flow. Second operand 6 states and 157 transitions. [2024-06-21 15:56:19,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 114 transitions, 899 flow [2024-06-21 15:56:19,607 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 114 transitions, 870 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-21 15:56:19,609 INFO L231 Difference]: Finished difference. Result has 87 places, 89 transitions, 664 flow [2024-06-21 15:56:19,609 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=598, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=664, PETRI_PLACES=87, PETRI_TRANSITIONS=89} [2024-06-21 15:56:19,609 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 45 predicate places. [2024-06-21 15:56:19,610 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 89 transitions, 664 flow [2024-06-21 15:56:19,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:56:19,610 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:56:19,610 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:56:19,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-21 15:56:19,610 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:56:19,611 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:56:19,611 INFO L85 PathProgramCache]: Analyzing trace with hash 1103140509, now seen corresponding path program 2 times [2024-06-21 15:56:19,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:56:19,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204614462] [2024-06-21 15:56:19,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:56:19,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:56:19,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:56:19,726 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:56:19,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:56:19,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204614462] [2024-06-21 15:56:19,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204614462] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:56:19,727 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:56:19,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:56:19,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46829641] [2024-06-21 15:56:19,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:56:19,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:56:19,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:56:19,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:56:19,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:56:19,764 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-21 15:56:19,764 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 89 transitions, 664 flow. Second operand has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:56:19,764 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:56:19,765 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-21 15:56:19,765 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:56:19,955 INFO L124 PetriNetUnfolderBase]: 888/1494 cut-off events. [2024-06-21 15:56:19,955 INFO L125 PetriNetUnfolderBase]: For 11707/11739 co-relation queries the response was YES. [2024-06-21 15:56:19,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6674 conditions, 1494 events. 888/1494 cut-off events. For 11707/11739 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 7797 event pairs, 279 based on Foata normal form. 24/1471 useless extension candidates. Maximal degree in co-relation 6636. Up to 1210 conditions per place. [2024-06-21 15:56:19,968 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 68 selfloop transitions, 32 changer transitions 0/119 dead transitions. [2024-06-21 15:56:19,968 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 119 transitions, 1020 flow [2024-06-21 15:56:19,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:56:19,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:56:19,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 160 transitions. [2024-06-21 15:56:19,970 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6504065040650406 [2024-06-21 15:56:19,970 INFO L175 Difference]: Start difference. First operand has 87 places, 89 transitions, 664 flow. Second operand 6 states and 160 transitions. [2024-06-21 15:56:19,970 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 119 transitions, 1020 flow [2024-06-21 15:56:19,984 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 119 transitions, 978 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-21 15:56:19,986 INFO L231 Difference]: Finished difference. Result has 89 places, 95 transitions, 749 flow [2024-06-21 15:56:19,986 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=622, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=749, PETRI_PLACES=89, PETRI_TRANSITIONS=95} [2024-06-21 15:56:19,987 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 47 predicate places. [2024-06-21 15:56:19,987 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 95 transitions, 749 flow [2024-06-21 15:56:19,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:56:19,988 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:56:19,988 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:56:19,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-21 15:56:19,988 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:56:19,989 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:56:19,989 INFO L85 PathProgramCache]: Analyzing trace with hash -270800167, now seen corresponding path program 3 times [2024-06-21 15:56:19,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:56:19,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621620693] [2024-06-21 15:56:19,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:56:19,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:56:20,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:56:20,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:56:20,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:56:20,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621620693] [2024-06-21 15:56:20,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621620693] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:56:20,166 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:56:20,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:56:20,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768838474] [2024-06-21 15:56:20,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:56:20,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:56:20,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:56:20,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:56:20,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:56:20,206 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-21 15:56:20,207 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 95 transitions, 749 flow. Second operand has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:56:20,207 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:56:20,207 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-21 15:56:20,207 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:56:20,392 INFO L124 PetriNetUnfolderBase]: 892/1492 cut-off events. [2024-06-21 15:56:20,392 INFO L125 PetriNetUnfolderBase]: For 13750/13780 co-relation queries the response was YES. [2024-06-21 15:56:20,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7050 conditions, 1492 events. 892/1492 cut-off events. For 13750/13780 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 7765 event pairs, 290 based on Foata normal form. 18/1459 useless extension candidates. Maximal degree in co-relation 7011. Up to 1219 conditions per place. [2024-06-21 15:56:20,405 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 63 selfloop transitions, 32 changer transitions 0/114 dead transitions. [2024-06-21 15:56:20,406 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 114 transitions, 987 flow [2024-06-21 15:56:20,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:56:20,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:56:20,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 155 transitions. [2024-06-21 15:56:20,407 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6300813008130082 [2024-06-21 15:56:20,407 INFO L175 Difference]: Start difference. First operand has 89 places, 95 transitions, 749 flow. Second operand 6 states and 155 transitions. [2024-06-21 15:56:20,407 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 114 transitions, 987 flow [2024-06-21 15:56:20,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 114 transitions, 937 flow, removed 15 selfloop flow, removed 2 redundant places. [2024-06-21 15:56:20,424 INFO L231 Difference]: Finished difference. Result has 93 places, 95 transitions, 772 flow [2024-06-21 15:56:20,424 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=699, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=772, PETRI_PLACES=93, PETRI_TRANSITIONS=95} [2024-06-21 15:56:20,425 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 51 predicate places. [2024-06-21 15:56:20,425 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 95 transitions, 772 flow [2024-06-21 15:56:20,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:56:20,425 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:56:20,425 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:56:20,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-21 15:56:20,425 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:56:20,426 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:56:20,426 INFO L85 PathProgramCache]: Analyzing trace with hash 2017711574, now seen corresponding path program 1 times [2024-06-21 15:56:20,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:56:20,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161689069] [2024-06-21 15:56:20,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:56:20,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:56:20,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:56:20,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:56:20,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:56:20,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161689069] [2024-06-21 15:56:20,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161689069] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:56:20,557 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:56:20,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:56:20,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575126606] [2024-06-21 15:56:20,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:56:20,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:56:20,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:56:20,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:56:20,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:56:20,597 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:56:20,598 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 95 transitions, 772 flow. Second operand has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:56:20,598 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:56:20,598 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:56:20,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:56:20,831 INFO L124 PetriNetUnfolderBase]: 944/1564 cut-off events. [2024-06-21 15:56:20,832 INFO L125 PetriNetUnfolderBase]: For 13690/13690 co-relation queries the response was YES. [2024-06-21 15:56:20,869 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7286 conditions, 1564 events. 944/1564 cut-off events. For 13690/13690 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 7884 event pairs, 298 based on Foata normal form. 2/1565 useless extension candidates. Maximal degree in co-relation 7245. Up to 1381 conditions per place. [2024-06-21 15:56:20,876 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 109 selfloop transitions, 16 changer transitions 0/133 dead transitions. [2024-06-21 15:56:20,876 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 133 transitions, 1163 flow [2024-06-21 15:56:20,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:56:20,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:56:20,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-06-21 15:56:20,878 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6062717770034843 [2024-06-21 15:56:20,878 INFO L175 Difference]: Start difference. First operand has 93 places, 95 transitions, 772 flow. Second operand 7 states and 174 transitions. [2024-06-21 15:56:20,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 133 transitions, 1163 flow [2024-06-21 15:56:20,894 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 133 transitions, 1058 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-21 15:56:20,899 INFO L231 Difference]: Finished difference. Result has 96 places, 104 transitions, 796 flow [2024-06-21 15:56:20,899 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=679, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=796, PETRI_PLACES=96, PETRI_TRANSITIONS=104} [2024-06-21 15:56:20,900 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 54 predicate places. [2024-06-21 15:56:20,901 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 104 transitions, 796 flow [2024-06-21 15:56:20,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:56:20,901 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:56:20,901 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:56:20,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-21 15:56:20,901 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:56:20,902 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:56:20,902 INFO L85 PathProgramCache]: Analyzing trace with hash 925055864, now seen corresponding path program 2 times [2024-06-21 15:56:20,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:56:20,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019585685] [2024-06-21 15:56:20,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:56:20,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:56:20,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:56:21,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:56:21,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:56:21,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019585685] [2024-06-21 15:56:21,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019585685] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:56:21,039 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:56:21,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:56:21,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420768969] [2024-06-21 15:56:21,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:56:21,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:56:21,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:56:21,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:56:21,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:56:21,081 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:56:21,082 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 104 transitions, 796 flow. Second operand has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:56:21,082 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:56:21,082 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:56:21,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:56:21,336 INFO L124 PetriNetUnfolderBase]: 971/1611 cut-off events. [2024-06-21 15:56:21,336 INFO L125 PetriNetUnfolderBase]: For 15947/15947 co-relation queries the response was YES. [2024-06-21 15:56:21,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7751 conditions, 1611 events. 971/1611 cut-off events. For 15947/15947 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 8165 event pairs, 300 based on Foata normal form. 2/1611 useless extension candidates. Maximal degree in co-relation 7708. Up to 1298 conditions per place. [2024-06-21 15:56:21,351 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 98 selfloop transitions, 42 changer transitions 0/148 dead transitions. [2024-06-21 15:56:21,351 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 148 transitions, 1376 flow [2024-06-21 15:56:21,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:56:21,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:56:21,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 182 transitions. [2024-06-21 15:56:21,353 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6341463414634146 [2024-06-21 15:56:21,353 INFO L175 Difference]: Start difference. First operand has 96 places, 104 transitions, 796 flow. Second operand 7 states and 182 transitions. [2024-06-21 15:56:21,353 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 148 transitions, 1376 flow [2024-06-21 15:56:21,376 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 148 transitions, 1330 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-21 15:56:21,378 INFO L231 Difference]: Finished difference. Result has 102 places, 117 transitions, 982 flow [2024-06-21 15:56:21,379 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=750, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=982, PETRI_PLACES=102, PETRI_TRANSITIONS=117} [2024-06-21 15:56:21,379 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 60 predicate places. [2024-06-21 15:56:21,380 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 117 transitions, 982 flow [2024-06-21 15:56:21,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:56:21,380 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:56:21,380 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:56:21,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-21 15:56:21,381 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:56:21,381 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:56:21,381 INFO L85 PathProgramCache]: Analyzing trace with hash -162381502, now seen corresponding path program 3 times [2024-06-21 15:56:21,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:56:21,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668454550] [2024-06-21 15:56:21,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:56:21,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:56:21,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:56:21,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:56:21,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:56:21,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668454550] [2024-06-21 15:56:21,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668454550] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:56:21,523 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:56:21,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:56:21,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769938751] [2024-06-21 15:56:21,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:56:21,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:56:21,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:56:21,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:56:21,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:56:21,558 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:56:21,559 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 117 transitions, 982 flow. Second operand has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:56:21,559 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:56:21,559 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:56:21,559 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:56:21,797 INFO L124 PetriNetUnfolderBase]: 966/1604 cut-off events. [2024-06-21 15:56:21,797 INFO L125 PetriNetUnfolderBase]: For 18236/18236 co-relation queries the response was YES. [2024-06-21 15:56:21,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8217 conditions, 1604 events. 966/1604 cut-off events. For 18236/18236 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 8180 event pairs, 300 based on Foata normal form. 2/1604 useless extension candidates. Maximal degree in co-relation 8171. Up to 1293 conditions per place. [2024-06-21 15:56:21,813 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 97 selfloop transitions, 41 changer transitions 0/146 dead transitions. [2024-06-21 15:56:21,813 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 146 transitions, 1397 flow [2024-06-21 15:56:21,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:56:21,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:56:21,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-21 15:56:21,815 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6306620209059234 [2024-06-21 15:56:21,815 INFO L175 Difference]: Start difference. First operand has 102 places, 117 transitions, 982 flow. Second operand 7 states and 181 transitions. [2024-06-21 15:56:21,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 146 transitions, 1397 flow [2024-06-21 15:56:21,840 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 146 transitions, 1355 flow, removed 17 selfloop flow, removed 1 redundant places. [2024-06-21 15:56:21,842 INFO L231 Difference]: Finished difference. Result has 108 places, 117 transitions, 1030 flow [2024-06-21 15:56:21,843 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=940, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1030, PETRI_PLACES=108, PETRI_TRANSITIONS=117} [2024-06-21 15:56:21,843 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 66 predicate places. [2024-06-21 15:56:21,843 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 117 transitions, 1030 flow [2024-06-21 15:56:21,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:56:21,844 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:56:21,844 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:56:21,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-21 15:56:21,844 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:56:21,844 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:56:21,845 INFO L85 PathProgramCache]: Analyzing trace with hash -162166176, now seen corresponding path program 1 times [2024-06-21 15:56:21,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:56:21,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016776292] [2024-06-21 15:56:21,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:56:21,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:56:21,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:56:21,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:56:21,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:56:22,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016776292] [2024-06-21 15:56:22,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016776292] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:56:22,000 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:56:22,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:56:22,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869212415] [2024-06-21 15:56:22,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:56:22,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:56:22,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:56:22,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:56:22,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:56:22,069 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:56:22,069 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 117 transitions, 1030 flow. Second operand has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:56:22,069 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:56:22,069 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:56:22,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:56:22,358 INFO L124 PetriNetUnfolderBase]: 983/1631 cut-off events. [2024-06-21 15:56:22,358 INFO L125 PetriNetUnfolderBase]: For 20499/20499 co-relation queries the response was YES. [2024-06-21 15:56:22,367 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8497 conditions, 1631 events. 983/1631 cut-off events. For 20499/20499 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 8296 event pairs, 296 based on Foata normal form. 4/1633 useless extension candidates. Maximal degree in co-relation 8449. Up to 1392 conditions per place. [2024-06-21 15:56:22,375 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 111 selfloop transitions, 27 changer transitions 0/146 dead transitions. [2024-06-21 15:56:22,375 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 146 transitions, 1388 flow [2024-06-21 15:56:22,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:56:22,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:56:22,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-21 15:56:22,377 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-21 15:56:22,378 INFO L175 Difference]: Start difference. First operand has 108 places, 117 transitions, 1030 flow. Second operand 7 states and 175 transitions. [2024-06-21 15:56:22,378 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 146 transitions, 1388 flow [2024-06-21 15:56:22,408 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 146 transitions, 1292 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-21 15:56:22,412 INFO L231 Difference]: Finished difference. Result has 110 places, 119 transitions, 1013 flow [2024-06-21 15:56:22,412 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=934, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1013, PETRI_PLACES=110, PETRI_TRANSITIONS=119} [2024-06-21 15:56:22,413 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 68 predicate places. [2024-06-21 15:56:22,413 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 119 transitions, 1013 flow [2024-06-21 15:56:22,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:56:22,413 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:56:22,413 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:56:22,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-21 15:56:22,414 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:56:22,414 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:56:22,414 INFO L85 PathProgramCache]: Analyzing trace with hash 206650254, now seen corresponding path program 4 times [2024-06-21 15:56:22,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:56:22,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298269444] [2024-06-21 15:56:22,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:56:22,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:56:22,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:56:22,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:56:22,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:56:22,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298269444] [2024-06-21 15:56:22,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298269444] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:56:22,557 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:56:22,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:56:22,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132907998] [2024-06-21 15:56:22,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:56:22,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:56:22,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:56:22,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:56:22,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:56:22,603 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:56:22,603 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 119 transitions, 1013 flow. Second operand has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:56:22,603 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:56:22,603 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:56:22,604 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:56:22,840 INFO L124 PetriNetUnfolderBase]: 994/1642 cut-off events. [2024-06-21 15:56:22,840 INFO L125 PetriNetUnfolderBase]: For 22116/22116 co-relation queries the response was YES. [2024-06-21 15:56:22,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8755 conditions, 1642 events. 994/1642 cut-off events. For 22116/22116 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 8369 event pairs, 304 based on Foata normal form. 2/1641 useless extension candidates. Maximal degree in co-relation 8706. Up to 1332 conditions per place. [2024-06-21 15:56:22,857 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 93 selfloop transitions, 48 changer transitions 0/149 dead transitions. [2024-06-21 15:56:22,857 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 149 transitions, 1480 flow [2024-06-21 15:56:22,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:56:22,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:56:22,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-21 15:56:22,859 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6132404181184669 [2024-06-21 15:56:22,859 INFO L175 Difference]: Start difference. First operand has 110 places, 119 transitions, 1013 flow. Second operand 7 states and 176 transitions. [2024-06-21 15:56:22,859 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 149 transitions, 1480 flow [2024-06-21 15:56:22,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 149 transitions, 1419 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-21 15:56:22,895 INFO L231 Difference]: Finished difference. Result has 113 places, 124 transitions, 1127 flow [2024-06-21 15:56:22,895 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=952, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1127, PETRI_PLACES=113, PETRI_TRANSITIONS=124} [2024-06-21 15:56:22,896 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 71 predicate places. [2024-06-21 15:56:22,896 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 124 transitions, 1127 flow [2024-06-21 15:56:22,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:56:22,896 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:56:22,897 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:56:22,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-21 15:56:22,897 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:56:22,897 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:56:22,897 INFO L85 PathProgramCache]: Analyzing trace with hash 863084302, now seen corresponding path program 5 times [2024-06-21 15:56:22,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:56:22,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711523214] [2024-06-21 15:56:22,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:56:22,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:56:22,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:56:23,031 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:56:23,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:56:23,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711523214] [2024-06-21 15:56:23,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711523214] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:56:23,032 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:56:23,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:56:23,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968346420] [2024-06-21 15:56:23,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:56:23,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:56:23,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:56:23,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:56:23,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:56:23,074 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:56:23,074 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 124 transitions, 1127 flow. Second operand has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:56:23,074 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:56:23,074 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:56:23,075 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:56:23,321 INFO L124 PetriNetUnfolderBase]: 1005/1663 cut-off events. [2024-06-21 15:56:23,322 INFO L125 PetriNetUnfolderBase]: For 24666/24666 co-relation queries the response was YES. [2024-06-21 15:56:23,345 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9109 conditions, 1663 events. 1005/1663 cut-off events. For 24666/24666 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 8505 event pairs, 304 based on Foata normal form. 2/1662 useless extension candidates. Maximal degree in co-relation 9058. Up to 1344 conditions per place. [2024-06-21 15:56:23,354 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 96 selfloop transitions, 48 changer transitions 0/152 dead transitions. [2024-06-21 15:56:23,355 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 152 transitions, 1594 flow [2024-06-21 15:56:23,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:56:23,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:56:23,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-21 15:56:23,356 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6202090592334495 [2024-06-21 15:56:23,356 INFO L175 Difference]: Start difference. First operand has 113 places, 124 transitions, 1127 flow. Second operand 7 states and 178 transitions. [2024-06-21 15:56:23,356 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 152 transitions, 1594 flow [2024-06-21 15:56:23,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 152 transitions, 1516 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-06-21 15:56:23,398 INFO L231 Difference]: Finished difference. Result has 117 places, 127 transitions, 1194 flow [2024-06-21 15:56:23,398 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1054, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1194, PETRI_PLACES=117, PETRI_TRANSITIONS=127} [2024-06-21 15:56:23,399 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 75 predicate places. [2024-06-21 15:56:23,399 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 127 transitions, 1194 flow [2024-06-21 15:56:23,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:56:23,399 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:56:23,399 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:56:23,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-21 15:56:23,400 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:56:23,400 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:56:23,400 INFO L85 PathProgramCache]: Analyzing trace with hash 863078722, now seen corresponding path program 6 times [2024-06-21 15:56:23,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:56:23,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187013709] [2024-06-21 15:56:23,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:56:23,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:56:23,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:56:23,535 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:56:23,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:56:23,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187013709] [2024-06-21 15:56:23,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187013709] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:56:23,536 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:56:23,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:56:23,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244303184] [2024-06-21 15:56:23,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:56:23,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:56:23,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:56:23,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:56:23,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:56:23,572 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:56:23,573 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 127 transitions, 1194 flow. Second operand has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:56:23,573 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:56:23,573 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:56:23,573 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:56:23,823 INFO L124 PetriNetUnfolderBase]: 1000/1656 cut-off events. [2024-06-21 15:56:23,823 INFO L125 PetriNetUnfolderBase]: For 26611/26611 co-relation queries the response was YES. [2024-06-21 15:56:23,833 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9134 conditions, 1656 events. 1000/1656 cut-off events. For 26611/26611 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 8462 event pairs, 304 based on Foata normal form. 2/1655 useless extension candidates. Maximal degree in co-relation 9082. Up to 1339 conditions per place. [2024-06-21 15:56:23,842 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 93 selfloop transitions, 49 changer transitions 0/150 dead transitions. [2024-06-21 15:56:23,842 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 150 transitions, 1536 flow [2024-06-21 15:56:23,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:56:23,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:56:23,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-21 15:56:23,845 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-21 15:56:23,845 INFO L175 Difference]: Start difference. First operand has 117 places, 127 transitions, 1194 flow. Second operand 7 states and 175 transitions. [2024-06-21 15:56:23,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 150 transitions, 1536 flow [2024-06-21 15:56:23,888 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 150 transitions, 1366 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-21 15:56:23,891 INFO L231 Difference]: Finished difference. Result has 118 places, 127 transitions, 1130 flow [2024-06-21 15:56:23,891 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1024, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1130, PETRI_PLACES=118, PETRI_TRANSITIONS=127} [2024-06-21 15:56:23,892 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 76 predicate places. [2024-06-21 15:56:23,892 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 127 transitions, 1130 flow [2024-06-21 15:56:23,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:56:23,892 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:56:23,892 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:56:23,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-21 15:56:23,893 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:56:23,893 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:56:23,893 INFO L85 PathProgramCache]: Analyzing trace with hash 863294048, now seen corresponding path program 2 times [2024-06-21 15:56:23,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:56:23,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841752140] [2024-06-21 15:56:23,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:56:23,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:56:23,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:56:24,036 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:56:24,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:56:24,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841752140] [2024-06-21 15:56:24,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841752140] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:56:24,037 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:56:24,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:56:24,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184574551] [2024-06-21 15:56:24,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:56:24,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:56:24,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:56:24,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:56:24,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:56:24,077 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:56:24,077 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 127 transitions, 1130 flow. Second operand has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:56:24,078 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:56:24,078 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:56:24,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:56:24,352 INFO L124 PetriNetUnfolderBase]: 1017/1688 cut-off events. [2024-06-21 15:56:24,352 INFO L125 PetriNetUnfolderBase]: For 28848/28848 co-relation queries the response was YES. [2024-06-21 15:56:24,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9241 conditions, 1688 events. 1017/1688 cut-off events. For 28848/28848 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 8612 event pairs, 297 based on Foata normal form. 4/1690 useless extension candidates. Maximal degree in co-relation 9189. Up to 1444 conditions per place. [2024-06-21 15:56:24,371 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 118 selfloop transitions, 27 changer transitions 0/153 dead transitions. [2024-06-21 15:56:24,371 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 153 transitions, 1498 flow [2024-06-21 15:56:24,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:56:24,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:56:24,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-21 15:56:24,372 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5993031358885017 [2024-06-21 15:56:24,372 INFO L175 Difference]: Start difference. First operand has 118 places, 127 transitions, 1130 flow. Second operand 7 states and 172 transitions. [2024-06-21 15:56:24,372 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 153 transitions, 1498 flow [2024-06-21 15:56:24,423 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 153 transitions, 1402 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-21 15:56:24,426 INFO L231 Difference]: Finished difference. Result has 120 places, 129 transitions, 1117 flow [2024-06-21 15:56:24,426 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1034, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1117, PETRI_PLACES=120, PETRI_TRANSITIONS=129} [2024-06-21 15:56:24,427 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 78 predicate places. [2024-06-21 15:56:24,427 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 129 transitions, 1117 flow [2024-06-21 15:56:24,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:56:24,427 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:56:24,427 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:56:24,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-21 15:56:24,428 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:56:24,428 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:56:24,428 INFO L85 PathProgramCache]: Analyzing trace with hash 897202958, now seen corresponding path program 3 times [2024-06-21 15:56:24,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:56:24,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656054151] [2024-06-21 15:56:24,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:56:24,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:56:24,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:56:24,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:56:24,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:56:24,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656054151] [2024-06-21 15:56:24,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656054151] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:56:24,570 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:56:24,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:56:24,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630177402] [2024-06-21 15:56:24,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:56:24,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:56:24,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:56:24,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:56:24,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:56:24,616 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:56:24,617 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 129 transitions, 1117 flow. Second operand has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:56:24,617 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:56:24,617 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:56:24,617 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:56:24,878 INFO L124 PetriNetUnfolderBase]: 1034/1725 cut-off events. [2024-06-21 15:56:24,878 INFO L125 PetriNetUnfolderBase]: For 31373/31373 co-relation queries the response was YES. [2024-06-21 15:56:24,890 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9531 conditions, 1725 events. 1034/1725 cut-off events. For 31373/31373 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 8890 event pairs, 302 based on Foata normal form. 4/1727 useless extension candidates. Maximal degree in co-relation 9478. Up to 1471 conditions per place. [2024-06-21 15:56:24,898 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 119 selfloop transitions, 28 changer transitions 0/155 dead transitions. [2024-06-21 15:56:24,899 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 155 transitions, 1493 flow [2024-06-21 15:56:24,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:56:24,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:56:24,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-21 15:56:24,900 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5958188153310104 [2024-06-21 15:56:24,900 INFO L175 Difference]: Start difference. First operand has 120 places, 129 transitions, 1117 flow. Second operand 7 states and 171 transitions. [2024-06-21 15:56:24,900 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 155 transitions, 1493 flow [2024-06-21 15:56:24,947 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 155 transitions, 1428 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-21 15:56:24,949 INFO L231 Difference]: Finished difference. Result has 122 places, 131 transitions, 1141 flow [2024-06-21 15:56:24,949 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1052, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1141, PETRI_PLACES=122, PETRI_TRANSITIONS=131} [2024-06-21 15:56:24,950 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 80 predicate places. [2024-06-21 15:56:24,950 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 131 transitions, 1141 flow [2024-06-21 15:56:24,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:56:24,950 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:56:24,950 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:56:24,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-21 15:56:24,951 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:56:24,951 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:56:24,951 INFO L85 PathProgramCache]: Analyzing trace with hash 1129317758, now seen corresponding path program 4 times [2024-06-21 15:56:24,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:56:24,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271146031] [2024-06-21 15:56:24,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:56:24,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:56:24,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:56:25,076 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:56:25,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:56:25,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271146031] [2024-06-21 15:56:25,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271146031] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:56:25,077 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:56:25,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:56:25,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490845795] [2024-06-21 15:56:25,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:56:25,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:56:25,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:56:25,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:56:25,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:56:25,132 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:56:25,132 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 131 transitions, 1141 flow. Second operand has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:56:25,133 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:56:25,133 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:56:25,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:56:25,375 INFO L124 PetriNetUnfolderBase]: 1026/1713 cut-off events. [2024-06-21 15:56:25,375 INFO L125 PetriNetUnfolderBase]: For 32976/32976 co-relation queries the response was YES. [2024-06-21 15:56:25,384 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9584 conditions, 1713 events. 1026/1713 cut-off events. For 32976/32976 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 8892 event pairs, 271 based on Foata normal form. 4/1715 useless extension candidates. Maximal degree in co-relation 9530. Up to 1382 conditions per place. [2024-06-21 15:56:25,392 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 115 selfloop transitions, 35 changer transitions 0/158 dead transitions. [2024-06-21 15:56:25,392 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 158 transitions, 1529 flow [2024-06-21 15:56:25,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:56:25,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:56:25,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-21 15:56:25,393 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5993031358885017 [2024-06-21 15:56:25,394 INFO L175 Difference]: Start difference. First operand has 122 places, 131 transitions, 1141 flow. Second operand 7 states and 172 transitions. [2024-06-21 15:56:25,394 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 158 transitions, 1529 flow [2024-06-21 15:56:25,450 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 158 transitions, 1458 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-21 15:56:25,452 INFO L231 Difference]: Finished difference. Result has 124 places, 133 transitions, 1177 flow [2024-06-21 15:56:25,452 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1070, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1177, PETRI_PLACES=124, PETRI_TRANSITIONS=133} [2024-06-21 15:56:25,453 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 82 predicate places. [2024-06-21 15:56:25,453 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 133 transitions, 1177 flow [2024-06-21 15:56:25,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:56:25,453 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:56:25,453 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:56:25,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-21 15:56:25,453 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:56:25,454 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:56:25,454 INFO L85 PathProgramCache]: Analyzing trace with hash 2090210172, now seen corresponding path program 1 times [2024-06-21 15:56:25,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:56:25,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854081250] [2024-06-21 15:56:25,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:56:25,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:56:25,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:56:25,602 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:56:25,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:56:25,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854081250] [2024-06-21 15:56:25,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854081250] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:56:25,602 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:56:25,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:56:25,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584340381] [2024-06-21 15:56:25,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:56:25,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:56:25,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:56:25,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:56:25,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:56:25,674 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-21 15:56:25,674 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 133 transitions, 1177 flow. Second operand has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:56:25,674 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:56:25,674 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-21 15:56:25,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:56:25,960 INFO L124 PetriNetUnfolderBase]: 1032/1742 cut-off events. [2024-06-21 15:56:25,960 INFO L125 PetriNetUnfolderBase]: For 40949/40989 co-relation queries the response was YES. [2024-06-21 15:56:25,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10184 conditions, 1742 events. 1032/1742 cut-off events. For 40949/40989 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 9269 event pairs, 170 based on Foata normal form. 10/1703 useless extension candidates. Maximal degree in co-relation 10129. Up to 1380 conditions per place. [2024-06-21 15:56:25,978 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 114 selfloop transitions, 27 changer transitions 0/174 dead transitions. [2024-06-21 15:56:25,979 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 174 transitions, 1687 flow [2024-06-21 15:56:25,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:56:25,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:56:25,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 206 transitions. [2024-06-21 15:56:25,980 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6280487804878049 [2024-06-21 15:56:25,980 INFO L175 Difference]: Start difference. First operand has 124 places, 133 transitions, 1177 flow. Second operand 8 states and 206 transitions. [2024-06-21 15:56:25,980 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 174 transitions, 1687 flow [2024-06-21 15:56:26,033 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 174 transitions, 1598 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-21 15:56:26,035 INFO L231 Difference]: Finished difference. Result has 127 places, 137 transitions, 1193 flow [2024-06-21 15:56:26,035 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1088, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1193, PETRI_PLACES=127, PETRI_TRANSITIONS=137} [2024-06-21 15:56:26,036 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 85 predicate places. [2024-06-21 15:56:26,036 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 137 transitions, 1193 flow [2024-06-21 15:56:26,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:56:26,037 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:56:26,037 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:56:26,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-21 15:56:26,037 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:56:26,037 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:56:26,038 INFO L85 PathProgramCache]: Analyzing trace with hash -1022589922, now seen corresponding path program 2 times [2024-06-21 15:56:26,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:56:26,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282483879] [2024-06-21 15:56:26,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:56:26,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:56:26,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:56:26,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:56:26,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:56:26,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282483879] [2024-06-21 15:56:26,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282483879] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:56:26,184 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:56:26,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:56:26,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218905716] [2024-06-21 15:56:26,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:56:26,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:56:26,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:56:26,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:56:26,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:56:26,239 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-21 15:56:26,239 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 137 transitions, 1193 flow. Second operand has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:56:26,239 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:56:26,239 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-21 15:56:26,239 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:56:26,548 INFO L124 PetriNetUnfolderBase]: 1019/1718 cut-off events. [2024-06-21 15:56:26,548 INFO L125 PetriNetUnfolderBase]: For 42471/42510 co-relation queries the response was YES. [2024-06-21 15:56:26,557 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10102 conditions, 1718 events. 1019/1718 cut-off events. For 42471/42510 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 9103 event pairs, 237 based on Foata normal form. 8/1676 useless extension candidates. Maximal degree in co-relation 10046. Up to 1429 conditions per place. [2024-06-21 15:56:26,564 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 111 selfloop transitions, 23 changer transitions 0/167 dead transitions. [2024-06-21 15:56:26,565 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 167 transitions, 1537 flow [2024-06-21 15:56:26,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:56:26,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:56:26,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-06-21 15:56:26,567 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.627177700348432 [2024-06-21 15:56:26,567 INFO L175 Difference]: Start difference. First operand has 127 places, 137 transitions, 1193 flow. Second operand 7 states and 180 transitions. [2024-06-21 15:56:26,567 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 167 transitions, 1537 flow [2024-06-21 15:56:26,626 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 167 transitions, 1480 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-21 15:56:26,628 INFO L231 Difference]: Finished difference. Result has 130 places, 137 transitions, 1190 flow [2024-06-21 15:56:26,629 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1136, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1190, PETRI_PLACES=130, PETRI_TRANSITIONS=137} [2024-06-21 15:56:26,629 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 88 predicate places. [2024-06-21 15:56:26,630 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 137 transitions, 1190 flow [2024-06-21 15:56:26,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:56:26,630 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:56:26,630 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:56:26,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-21 15:56:26,630 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:56:26,631 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:56:26,631 INFO L85 PathProgramCache]: Analyzing trace with hash -1394472220, now seen corresponding path program 3 times [2024-06-21 15:56:26,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:56:26,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027261004] [2024-06-21 15:56:26,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:56:26,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:56:26,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:56:26,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:56:26,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:56:26,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027261004] [2024-06-21 15:56:26,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027261004] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:56:26,761 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:56:26,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:56:26,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806922850] [2024-06-21 15:56:26,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:56:26,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:56:26,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:56:26,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:56:26,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:56:26,812 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-21 15:56:26,812 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 137 transitions, 1190 flow. Second operand has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:56:26,812 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:56:26,813 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-21 15:56:26,813 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:56:27,090 INFO L124 PetriNetUnfolderBase]: 1038/1750 cut-off events. [2024-06-21 15:56:27,091 INFO L125 PetriNetUnfolderBase]: For 46168/46201 co-relation queries the response was YES. [2024-06-21 15:56:27,100 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10343 conditions, 1750 events. 1038/1750 cut-off events. For 46168/46201 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 9290 event pairs, 241 based on Foata normal form. 6/1701 useless extension candidates. Maximal degree in co-relation 10285. Up to 1403 conditions per place. [2024-06-21 15:56:27,109 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 91 selfloop transitions, 42 changer transitions 0/166 dead transitions. [2024-06-21 15:56:27,109 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 166 transitions, 1548 flow [2024-06-21 15:56:27,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:56:27,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:56:27,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-21 15:56:27,110 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6306620209059234 [2024-06-21 15:56:27,110 INFO L175 Difference]: Start difference. First operand has 130 places, 137 transitions, 1190 flow. Second operand 7 states and 181 transitions. [2024-06-21 15:56:27,111 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 166 transitions, 1548 flow [2024-06-21 15:56:27,217 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 166 transitions, 1496 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-21 15:56:27,219 INFO L231 Difference]: Finished difference. Result has 131 places, 139 transitions, 1258 flow [2024-06-21 15:56:27,219 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1138, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1258, PETRI_PLACES=131, PETRI_TRANSITIONS=139} [2024-06-21 15:56:27,220 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 89 predicate places. [2024-06-21 15:56:27,220 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 139 transitions, 1258 flow [2024-06-21 15:56:27,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:56:27,220 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:56:27,220 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:56:27,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-21 15:56:27,221 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:56:27,221 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:56:27,221 INFO L85 PathProgramCache]: Analyzing trace with hash -1455807966, now seen corresponding path program 1 times [2024-06-21 15:56:27,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:56:27,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393516124] [2024-06-21 15:56:27,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:56:27,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:56:27,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:56:27,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:56:27,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:56:27,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393516124] [2024-06-21 15:56:27,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393516124] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:56:27,344 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:56:27,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:56:27,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567841573] [2024-06-21 15:56:27,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:56:27,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:56:27,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:56:27,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:56:27,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:56:27,388 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-21 15:56:27,389 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 139 transitions, 1258 flow. Second operand has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:56:27,389 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:56:27,389 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-21 15:56:27,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:56:27,645 INFO L124 PetriNetUnfolderBase]: 1053/1798 cut-off events. [2024-06-21 15:56:27,646 INFO L125 PetriNetUnfolderBase]: For 44186/44186 co-relation queries the response was YES. [2024-06-21 15:56:27,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10607 conditions, 1798 events. 1053/1798 cut-off events. For 44186/44186 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 9614 event pairs, 273 based on Foata normal form. 2/1799 useless extension candidates. Maximal degree in co-relation 10548. Up to 1489 conditions per place. [2024-06-21 15:56:27,665 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 118 selfloop transitions, 27 changer transitions 0/167 dead transitions. [2024-06-21 15:56:27,666 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 167 transitions, 1746 flow [2024-06-21 15:56:27,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:56:27,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:56:27,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 152 transitions. [2024-06-21 15:56:27,668 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6178861788617886 [2024-06-21 15:56:27,668 INFO L175 Difference]: Start difference. First operand has 131 places, 139 transitions, 1258 flow. Second operand 6 states and 152 transitions. [2024-06-21 15:56:27,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 167 transitions, 1746 flow [2024-06-21 15:56:27,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 167 transitions, 1636 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-21 15:56:27,736 INFO L231 Difference]: Finished difference. Result has 133 places, 150 transitions, 1328 flow [2024-06-21 15:56:27,736 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1158, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1328, PETRI_PLACES=133, PETRI_TRANSITIONS=150} [2024-06-21 15:56:27,737 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 91 predicate places. [2024-06-21 15:56:27,738 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 150 transitions, 1328 flow [2024-06-21 15:56:27,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:56:27,738 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:56:27,738 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:56:27,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-21 15:56:27,738 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:56:27,739 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:56:27,739 INFO L85 PathProgramCache]: Analyzing trace with hash 985632764, now seen corresponding path program 4 times [2024-06-21 15:56:27,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:56:27,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529989774] [2024-06-21 15:56:27,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:56:27,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:56:27,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:56:27,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:56:27,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:56:27,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529989774] [2024-06-21 15:56:27,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529989774] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:56:27,873 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:56:27,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:56:27,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165593021] [2024-06-21 15:56:27,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:56:27,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:56:27,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:56:27,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:56:27,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:56:27,916 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-21 15:56:27,917 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 150 transitions, 1328 flow. Second operand has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:56:27,917 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:56:27,917 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-21 15:56:27,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:56:28,238 INFO L124 PetriNetUnfolderBase]: 1046/1755 cut-off events. [2024-06-21 15:56:28,238 INFO L125 PetriNetUnfolderBase]: For 50773/50806 co-relation queries the response was YES. [2024-06-21 15:56:28,247 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10695 conditions, 1755 events. 1046/1755 cut-off events. For 50773/50806 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 9374 event pairs, 246 based on Foata normal form. 6/1702 useless extension candidates. Maximal degree in co-relation 10634. Up to 1407 conditions per place. [2024-06-21 15:56:28,254 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 96 selfloop transitions, 47 changer transitions 0/176 dead transitions. [2024-06-21 15:56:28,254 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 176 transitions, 1702 flow [2024-06-21 15:56:28,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:56:28,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:56:28,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-21 15:56:28,256 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6202090592334495 [2024-06-21 15:56:28,256 INFO L175 Difference]: Start difference. First operand has 133 places, 150 transitions, 1328 flow. Second operand 7 states and 178 transitions. [2024-06-21 15:56:28,256 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 176 transitions, 1702 flow [2024-06-21 15:56:28,320 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 176 transitions, 1670 flow, removed 12 selfloop flow, removed 1 redundant places. [2024-06-21 15:56:28,322 INFO L231 Difference]: Finished difference. Result has 139 places, 152 transitions, 1430 flow [2024-06-21 15:56:28,322 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1296, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1430, PETRI_PLACES=139, PETRI_TRANSITIONS=152} [2024-06-21 15:56:28,323 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 97 predicate places. [2024-06-21 15:56:28,323 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 152 transitions, 1430 flow [2024-06-21 15:56:28,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:56:28,324 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:56:28,324 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:56:28,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-21 15:56:28,324 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:56:28,324 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:56:28,325 INFO L85 PathProgramCache]: Analyzing trace with hash -803414114, now seen corresponding path program 2 times [2024-06-21 15:56:28,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:56:28,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390735767] [2024-06-21 15:56:28,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:56:28,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:56:28,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:56:28,435 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:56:28,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:56:28,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390735767] [2024-06-21 15:56:28,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390735767] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:56:28,436 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:56:28,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:56:28,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23377972] [2024-06-21 15:56:28,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:56:28,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:56:28,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:56:28,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:56:28,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:56:28,477 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-21 15:56:28,478 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 152 transitions, 1430 flow. Second operand has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:56:28,478 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:56:28,478 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-21 15:56:28,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:56:28,736 INFO L124 PetriNetUnfolderBase]: 1045/1792 cut-off events. [2024-06-21 15:56:28,736 INFO L125 PetriNetUnfolderBase]: For 48116/48116 co-relation queries the response was YES. [2024-06-21 15:56:28,748 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10866 conditions, 1792 events. 1045/1792 cut-off events. For 48116/48116 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 9607 event pairs, 269 based on Foata normal form. 2/1793 useless extension candidates. Maximal degree in co-relation 10803. Up to 1476 conditions per place. [2024-06-21 15:56:28,755 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 119 selfloop transitions, 30 changer transitions 0/171 dead transitions. [2024-06-21 15:56:28,756 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 171 transitions, 1858 flow [2024-06-21 15:56:28,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 15:56:28,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 15:56:28,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 132 transitions. [2024-06-21 15:56:28,757 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6439024390243903 [2024-06-21 15:56:28,757 INFO L175 Difference]: Start difference. First operand has 139 places, 152 transitions, 1430 flow. Second operand 5 states and 132 transitions. [2024-06-21 15:56:28,757 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 171 transitions, 1858 flow [2024-06-21 15:56:28,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 171 transitions, 1744 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-21 15:56:28,828 INFO L231 Difference]: Finished difference. Result has 139 places, 155 transitions, 1420 flow [2024-06-21 15:56:28,828 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1316, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1420, PETRI_PLACES=139, PETRI_TRANSITIONS=155} [2024-06-21 15:56:28,829 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 97 predicate places. [2024-06-21 15:56:28,829 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 155 transitions, 1420 flow [2024-06-21 15:56:28,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:56:28,830 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:56:28,830 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:56:28,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-21 15:56:28,830 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:56:28,833 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:56:28,833 INFO L85 PathProgramCache]: Analyzing trace with hash 1210047240, now seen corresponding path program 3 times [2024-06-21 15:56:28,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:56:28,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952794959] [2024-06-21 15:56:28,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:56:28,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:56:28,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:56:28,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:56:28,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:56:28,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952794959] [2024-06-21 15:56:28,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952794959] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:56:28,982 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:56:28,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:56:28,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324228430] [2024-06-21 15:56:28,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:56:28,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:56:28,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:56:28,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:56:28,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:56:29,032 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-21 15:56:29,032 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 155 transitions, 1420 flow. Second operand has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:56:29,033 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:56:29,033 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-21 15:56:29,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:56:29,277 INFO L124 PetriNetUnfolderBase]: 1039/1784 cut-off events. [2024-06-21 15:56:29,278 INFO L125 PetriNetUnfolderBase]: For 49462/49462 co-relation queries the response was YES. [2024-06-21 15:56:29,290 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10714 conditions, 1784 events. 1039/1784 cut-off events. For 49462/49462 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 9540 event pairs, 268 based on Foata normal form. 2/1785 useless extension candidates. Maximal degree in co-relation 10650. Up to 1483 conditions per place. [2024-06-21 15:56:29,297 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 123 selfloop transitions, 24 changer transitions 0/169 dead transitions. [2024-06-21 15:56:29,298 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 169 transitions, 1750 flow [2024-06-21 15:56:29,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 15:56:29,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 15:56:29,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 111 transitions. [2024-06-21 15:56:29,299 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.676829268292683 [2024-06-21 15:56:29,299 INFO L175 Difference]: Start difference. First operand has 139 places, 155 transitions, 1420 flow. Second operand 4 states and 111 transitions. [2024-06-21 15:56:29,299 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 169 transitions, 1750 flow [2024-06-21 15:56:29,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 169 transitions, 1680 flow, removed 17 selfloop flow, removed 3 redundant places. [2024-06-21 15:56:29,390 INFO L231 Difference]: Finished difference. Result has 140 places, 155 transitions, 1419 flow [2024-06-21 15:56:29,391 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1350, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1419, PETRI_PLACES=140, PETRI_TRANSITIONS=155} [2024-06-21 15:56:29,391 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 98 predicate places. [2024-06-21 15:56:29,391 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 155 transitions, 1419 flow [2024-06-21 15:56:29,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:56:29,392 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:56:29,392 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:56:29,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-21 15:56:29,392 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:56:29,392 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:56:29,393 INFO L85 PathProgramCache]: Analyzing trace with hash -1249059418, now seen corresponding path program 1 times [2024-06-21 15:56:29,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:56:29,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903289992] [2024-06-21 15:56:29,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:56:29,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:56:29,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:56:29,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:56:29,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:56:29,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903289992] [2024-06-21 15:56:29,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903289992] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:56:29,501 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:56:29,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:56:29,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253387917] [2024-06-21 15:56:29,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:56:29,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:56:29,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:56:29,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:56:29,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:56:29,557 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-21 15:56:29,557 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 155 transitions, 1419 flow. Second operand has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:56:29,557 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:56:29,558 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-21 15:56:29,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:56:29,773 INFO L124 PetriNetUnfolderBase]: 1059/1810 cut-off events. [2024-06-21 15:56:29,773 INFO L125 PetriNetUnfolderBase]: For 50874/50874 co-relation queries the response was YES. [2024-06-21 15:56:29,785 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10916 conditions, 1810 events. 1059/1810 cut-off events. For 50874/50874 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 9734 event pairs, 241 based on Foata normal form. 2/1808 useless extension candidates. Maximal degree in co-relation 10852. Up to 1510 conditions per place. [2024-06-21 15:56:29,792 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 129 selfloop transitions, 24 changer transitions 0/178 dead transitions. [2024-06-21 15:56:29,792 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 178 transitions, 1883 flow [2024-06-21 15:56:29,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:56:29,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:56:29,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 151 transitions. [2024-06-21 15:56:29,793 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6138211382113821 [2024-06-21 15:56:29,793 INFO L175 Difference]: Start difference. First operand has 140 places, 155 transitions, 1419 flow. Second operand 6 states and 151 transitions. [2024-06-21 15:56:29,793 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 178 transitions, 1883 flow [2024-06-21 15:56:29,883 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 178 transitions, 1835 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-21 15:56:29,885 INFO L231 Difference]: Finished difference. Result has 143 places, 161 transitions, 1487 flow [2024-06-21 15:56:29,885 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1371, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1487, PETRI_PLACES=143, PETRI_TRANSITIONS=161} [2024-06-21 15:56:29,885 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 101 predicate places. [2024-06-21 15:56:29,886 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 161 transitions, 1487 flow [2024-06-21 15:56:29,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:56:29,886 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:56:29,886 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:56:29,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-21 15:56:29,886 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:56:29,886 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:56:29,887 INFO L85 PathProgramCache]: Analyzing trace with hash -82496380, now seen corresponding path program 2 times [2024-06-21 15:56:29,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:56:29,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82188031] [2024-06-21 15:56:29,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:56:29,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:56:29,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:56:30,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:56:30,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:56:30,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82188031] [2024-06-21 15:56:30,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82188031] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:56:30,025 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:56:30,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:56:30,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835623319] [2024-06-21 15:56:30,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:56:30,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:56:30,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:56:30,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:56:30,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:56:30,066 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-21 15:56:30,067 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 161 transitions, 1487 flow. Second operand has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:56:30,067 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:56:30,067 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-21 15:56:30,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:56:30,344 INFO L124 PetriNetUnfolderBase]: 1079/1842 cut-off events. [2024-06-21 15:56:30,344 INFO L125 PetriNetUnfolderBase]: For 54255/54255 co-relation queries the response was YES. [2024-06-21 15:56:30,356 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11342 conditions, 1842 events. 1079/1842 cut-off events. For 54255/54255 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 9930 event pairs, 241 based on Foata normal form. 2/1840 useless extension candidates. Maximal degree in co-relation 11277. Up to 1546 conditions per place. [2024-06-21 15:56:30,365 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 133 selfloop transitions, 24 changer transitions 0/182 dead transitions. [2024-06-21 15:56:30,365 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 182 transitions, 1915 flow [2024-06-21 15:56:30,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:56:30,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:56:30,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 146 transitions. [2024-06-21 15:56:30,366 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5934959349593496 [2024-06-21 15:56:30,366 INFO L175 Difference]: Start difference. First operand has 143 places, 161 transitions, 1487 flow. Second operand 6 states and 146 transitions. [2024-06-21 15:56:30,367 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 182 transitions, 1915 flow [2024-06-21 15:56:30,440 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 182 transitions, 1866 flow, removed 13 selfloop flow, removed 2 redundant places. [2024-06-21 15:56:30,443 INFO L231 Difference]: Finished difference. Result has 147 places, 169 transitions, 1581 flow [2024-06-21 15:56:30,443 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1445, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1581, PETRI_PLACES=147, PETRI_TRANSITIONS=169} [2024-06-21 15:56:30,444 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 105 predicate places. [2024-06-21 15:56:30,444 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 169 transitions, 1581 flow [2024-06-21 15:56:30,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:56:30,444 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:56:30,444 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:56:30,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-21 15:56:30,445 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:56:30,445 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:56:30,445 INFO L85 PathProgramCache]: Analyzing trace with hash -827214426, now seen corresponding path program 3 times [2024-06-21 15:56:30,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:56:30,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368392387] [2024-06-21 15:56:30,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:56:30,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:56:30,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:56:30,562 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:56:30,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:56:30,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368392387] [2024-06-21 15:56:30,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368392387] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:56:30,563 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:56:30,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:56:30,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737703435] [2024-06-21 15:56:30,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:56:30,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:56:30,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:56:30,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:56:30,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:56:30,603 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-21 15:56:30,603 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 169 transitions, 1581 flow. Second operand has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:56:30,603 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:56:30,603 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-21 15:56:30,604 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:56:30,863 INFO L124 PetriNetUnfolderBase]: 1072/1835 cut-off events. [2024-06-21 15:56:30,863 INFO L125 PetriNetUnfolderBase]: For 56295/56295 co-relation queries the response was YES. [2024-06-21 15:56:30,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11378 conditions, 1835 events. 1072/1835 cut-off events. For 56295/56295 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 9917 event pairs, 241 based on Foata normal form. 2/1833 useless extension candidates. Maximal degree in co-relation 11311. Up to 1524 conditions per place. [2024-06-21 15:56:30,882 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 130 selfloop transitions, 29 changer transitions 0/184 dead transitions. [2024-06-21 15:56:30,882 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 184 transitions, 1937 flow [2024-06-21 15:56:30,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 15:56:30,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 15:56:30,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 130 transitions. [2024-06-21 15:56:30,884 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6341463414634146 [2024-06-21 15:56:30,884 INFO L175 Difference]: Start difference. First operand has 147 places, 169 transitions, 1581 flow. Second operand 5 states and 130 transitions. [2024-06-21 15:56:30,884 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 184 transitions, 1937 flow [2024-06-21 15:56:30,937 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 184 transitions, 1860 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-06-21 15:56:30,939 INFO L231 Difference]: Finished difference. Result has 149 places, 169 transitions, 1578 flow [2024-06-21 15:56:30,939 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1504, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1578, PETRI_PLACES=149, PETRI_TRANSITIONS=169} [2024-06-21 15:56:30,939 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 107 predicate places. [2024-06-21 15:56:30,939 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 169 transitions, 1578 flow [2024-06-21 15:56:30,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:56:30,940 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:56:30,940 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:56:30,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-21 15:56:30,940 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:56:30,940 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:56:30,941 INFO L85 PathProgramCache]: Analyzing trace with hash -826968162, now seen corresponding path program 1 times [2024-06-21 15:56:30,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:56:30,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562536123] [2024-06-21 15:56:30,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:56:30,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:56:30,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:56:31,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:56:31,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:56:31,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562536123] [2024-06-21 15:56:31,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562536123] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:56:31,053 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:56:31,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:56:31,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858557871] [2024-06-21 15:56:31,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:56:31,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:56:31,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:56:31,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:56:31,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:56:31,112 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-21 15:56:31,112 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 169 transitions, 1578 flow. Second operand has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:56:31,112 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:56:31,112 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-21 15:56:31,112 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:56:31,298 INFO L124 PetriNetUnfolderBase]: 1058/1821 cut-off events. [2024-06-21 15:56:31,299 INFO L125 PetriNetUnfolderBase]: For 57067/57067 co-relation queries the response was YES. [2024-06-21 15:56:31,308 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11258 conditions, 1821 events. 1058/1821 cut-off events. For 57067/57067 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 9819 event pairs, 265 based on Foata normal form. 2/1822 useless extension candidates. Maximal degree in co-relation 11190. Up to 1531 conditions per place. [2024-06-21 15:56:31,313 INFO L140 encePairwiseOnDemand]: 36/41 looper letters, 148 selfloop transitions, 10 changer transitions 0/180 dead transitions. [2024-06-21 15:56:31,313 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 180 transitions, 1938 flow [2024-06-21 15:56:31,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 15:56:31,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 15:56:31,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 103 transitions. [2024-06-21 15:56:31,314 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6280487804878049 [2024-06-21 15:56:31,314 INFO L175 Difference]: Start difference. First operand has 149 places, 169 transitions, 1578 flow. Second operand 4 states and 103 transitions. [2024-06-21 15:56:31,314 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 180 transitions, 1938 flow [2024-06-21 15:56:31,382 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 180 transitions, 1878 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-06-21 15:56:31,384 INFO L231 Difference]: Finished difference. Result has 149 places, 171 transitions, 1569 flow [2024-06-21 15:56:31,384 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1518, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1569, PETRI_PLACES=149, PETRI_TRANSITIONS=171} [2024-06-21 15:56:31,385 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 107 predicate places. [2024-06-21 15:56:31,385 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 171 transitions, 1569 flow [2024-06-21 15:56:31,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:56:31,385 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:56:31,385 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:56:31,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-21 15:56:31,385 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:56:31,386 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:56:31,386 INFO L85 PathProgramCache]: Analyzing trace with hash -1637389373, now seen corresponding path program 1 times [2024-06-21 15:56:31,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:56:31,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008945740] [2024-06-21 15:56:31,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:56:31,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:56:31,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:56:31,582 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:56:31,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:56:31,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008945740] [2024-06-21 15:56:31,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008945740] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:56:31,583 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:56:31,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:56:31,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045082584] [2024-06-21 15:56:31,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:56:31,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:56:31,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:56:31,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:56:31,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:56:31,647 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:56:31,648 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 171 transitions, 1569 flow. Second operand has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 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) [2024-06-21 15:56:31,648 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:56:31,648 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:56:31,648 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:56:32,005 INFO L124 PetriNetUnfolderBase]: 1258/2107 cut-off events. [2024-06-21 15:56:32,006 INFO L125 PetriNetUnfolderBase]: For 71475/71475 co-relation queries the response was YES. [2024-06-21 15:56:32,016 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13085 conditions, 2107 events. 1258/2107 cut-off events. For 71475/71475 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 11445 event pairs, 198 based on Foata normal form. 12/2118 useless extension candidates. Maximal degree in co-relation 13016. Up to 1601 conditions per place. [2024-06-21 15:56:32,024 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 196 selfloop transitions, 20 changer transitions 0/224 dead transitions. [2024-06-21 15:56:32,024 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 224 transitions, 2333 flow [2024-06-21 15:56:32,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 15:56:32,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 15:56:32,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 226 transitions. [2024-06-21 15:56:32,032 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6124661246612466 [2024-06-21 15:56:32,033 INFO L175 Difference]: Start difference. First operand has 149 places, 171 transitions, 1569 flow. Second operand 9 states and 226 transitions. [2024-06-21 15:56:32,033 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 224 transitions, 2333 flow [2024-06-21 15:56:32,105 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 224 transitions, 2298 flow, removed 9 selfloop flow, removed 2 redundant places. [2024-06-21 15:56:32,108 INFO L231 Difference]: Finished difference. Result has 158 places, 176 transitions, 1654 flow [2024-06-21 15:56:32,108 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1534, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1654, PETRI_PLACES=158, PETRI_TRANSITIONS=176} [2024-06-21 15:56:32,108 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 116 predicate places. [2024-06-21 15:56:32,109 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 176 transitions, 1654 flow [2024-06-21 15:56:32,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 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) [2024-06-21 15:56:32,109 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:56:32,109 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:56:32,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-21 15:56:32,110 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:56:32,110 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:56:32,110 INFO L85 PathProgramCache]: Analyzing trace with hash -397869605, now seen corresponding path program 2 times [2024-06-21 15:56:32,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:56:32,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553516325] [2024-06-21 15:56:32,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:56:32,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:56:32,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:56:32,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:56:32,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:56:32,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553516325] [2024-06-21 15:56:32,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553516325] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:56:32,256 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:56:32,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:56:32,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569981264] [2024-06-21 15:56:32,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:56:32,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:56:32,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:56:32,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:56:32,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:56:32,308 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:56:32,309 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 176 transitions, 1654 flow. Second operand has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 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) [2024-06-21 15:56:32,309 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:56:32,309 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:56:32,309 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:56:32,676 INFO L124 PetriNetUnfolderBase]: 1299/2186 cut-off events. [2024-06-21 15:56:32,677 INFO L125 PetriNetUnfolderBase]: For 75427/75427 co-relation queries the response was YES. [2024-06-21 15:56:32,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13697 conditions, 2186 events. 1299/2186 cut-off events. For 75427/75427 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 12000 event pairs, 279 based on Foata normal form. 12/2197 useless extension candidates. Maximal degree in co-relation 13625. Up to 1735 conditions per place. [2024-06-21 15:56:32,694 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 195 selfloop transitions, 18 changer transitions 0/221 dead transitions. [2024-06-21 15:56:32,694 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 221 transitions, 2383 flow [2024-06-21 15:56:32,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:56:32,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:56:32,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 203 transitions. [2024-06-21 15:56:32,695 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6189024390243902 [2024-06-21 15:56:32,695 INFO L175 Difference]: Start difference. First operand has 158 places, 176 transitions, 1654 flow. Second operand 8 states and 203 transitions. [2024-06-21 15:56:32,695 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 221 transitions, 2383 flow [2024-06-21 15:56:32,815 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 221 transitions, 2341 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-21 15:56:32,817 INFO L231 Difference]: Finished difference. Result has 163 places, 179 transitions, 1706 flow [2024-06-21 15:56:32,818 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1612, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1706, PETRI_PLACES=163, PETRI_TRANSITIONS=179} [2024-06-21 15:56:32,818 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 121 predicate places. [2024-06-21 15:56:32,818 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 179 transitions, 1706 flow [2024-06-21 15:56:32,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 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) [2024-06-21 15:56:32,819 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:56:32,819 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:56:32,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-21 15:56:32,819 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:56:32,819 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:56:32,819 INFO L85 PathProgramCache]: Analyzing trace with hash -397721735, now seen corresponding path program 3 times [2024-06-21 15:56:32,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:56:32,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155362204] [2024-06-21 15:56:32,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:56:32,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:56:32,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:56:32,960 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:56:32,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:56:32,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155362204] [2024-06-21 15:56:32,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155362204] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:56:32,960 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:56:32,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:56:32,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044392055] [2024-06-21 15:56:32,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:56:32,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:56:32,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:56:32,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:56:32,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:56:33,011 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:56:33,012 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 179 transitions, 1706 flow. Second operand has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 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) [2024-06-21 15:56:33,012 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:56:33,012 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:56:33,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:56:33,347 INFO L124 PetriNetUnfolderBase]: 1271/2142 cut-off events. [2024-06-21 15:56:33,347 INFO L125 PetriNetUnfolderBase]: For 74242/74242 co-relation queries the response was YES. [2024-06-21 15:56:33,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13137 conditions, 2142 events. 1271/2142 cut-off events. For 74242/74242 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 11701 event pairs, 280 based on Foata normal form. 16/2157 useless extension candidates. Maximal degree in co-relation 13062. Up to 1814 conditions per place. [2024-06-21 15:56:33,364 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 192 selfloop transitions, 17 changer transitions 0/217 dead transitions. [2024-06-21 15:56:33,365 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 217 transitions, 2260 flow [2024-06-21 15:56:33,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:56:33,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:56:33,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-06-21 15:56:33,366 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6036585365853658 [2024-06-21 15:56:33,366 INFO L175 Difference]: Start difference. First operand has 163 places, 179 transitions, 1706 flow. Second operand 8 states and 198 transitions. [2024-06-21 15:56:33,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 217 transitions, 2260 flow [2024-06-21 15:56:33,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 217 transitions, 2202 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-06-21 15:56:33,472 INFO L231 Difference]: Finished difference. Result has 167 places, 180 transitions, 1713 flow [2024-06-21 15:56:33,472 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1658, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1713, PETRI_PLACES=167, PETRI_TRANSITIONS=180} [2024-06-21 15:56:33,472 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 125 predicate places. [2024-06-21 15:56:33,472 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 180 transitions, 1713 flow [2024-06-21 15:56:33,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 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) [2024-06-21 15:56:33,472 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:56:33,473 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:56:33,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-21 15:56:33,473 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:56:33,473 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:56:33,473 INFO L85 PathProgramCache]: Analyzing trace with hash -1358389153, now seen corresponding path program 4 times [2024-06-21 15:56:33,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:56:33,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854888649] [2024-06-21 15:56:33,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:56:33,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:56:33,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:56:33,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:56:33,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:56:33,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854888649] [2024-06-21 15:56:33,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854888649] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:56:33,621 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:56:33,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:56:33,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595130794] [2024-06-21 15:56:33,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:56:33,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:56:33,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:56:33,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:56:33,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:56:33,676 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:56:33,676 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 180 transitions, 1713 flow. Second operand has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 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) [2024-06-21 15:56:33,676 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:56:33,676 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:56:33,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:56:34,009 INFO L124 PetriNetUnfolderBase]: 1329/2250 cut-off events. [2024-06-21 15:56:34,009 INFO L125 PetriNetUnfolderBase]: For 77964/77964 co-relation queries the response was YES. [2024-06-21 15:56:34,019 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13601 conditions, 2250 events. 1329/2250 cut-off events. For 77964/77964 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 12500 event pairs, 305 based on Foata normal form. 16/2264 useless extension candidates. Maximal degree in co-relation 13524. Up to 1786 conditions per place. [2024-06-21 15:56:34,025 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 157 selfloop transitions, 50 changer transitions 0/215 dead transitions. [2024-06-21 15:56:34,025 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 215 transitions, 2251 flow [2024-06-21 15:56:34,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:56:34,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:56:34,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-06-21 15:56:34,026 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6158536585365854 [2024-06-21 15:56:34,027 INFO L175 Difference]: Start difference. First operand has 167 places, 180 transitions, 1713 flow. Second operand 8 states and 202 transitions. [2024-06-21 15:56:34,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 215 transitions, 2251 flow [2024-06-21 15:56:34,121 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 215 transitions, 2220 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-21 15:56:34,123 INFO L231 Difference]: Finished difference. Result has 169 places, 181 transitions, 1809 flow [2024-06-21 15:56:34,123 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1682, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1809, PETRI_PLACES=169, PETRI_TRANSITIONS=181} [2024-06-21 15:56:34,124 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 127 predicate places. [2024-06-21 15:56:34,124 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 181 transitions, 1809 flow [2024-06-21 15:56:34,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 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) [2024-06-21 15:56:34,124 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:56:34,124 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:56:34,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-21 15:56:34,125 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:56:34,125 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:56:34,125 INFO L85 PathProgramCache]: Analyzing trace with hash -1429915061, now seen corresponding path program 5 times [2024-06-21 15:56:34,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:56:34,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972014300] [2024-06-21 15:56:34,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:56:34,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:56:34,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:56:34,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:56:34,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:56:34,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972014300] [2024-06-21 15:56:34,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972014300] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:56:34,300 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:56:34,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:56:34,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676760638] [2024-06-21 15:56:34,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:56:34,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:56:34,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:56:34,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:56:34,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:56:34,351 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:56:34,352 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 181 transitions, 1809 flow. Second operand has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 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) [2024-06-21 15:56:34,352 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:56:34,352 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:56:34,352 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:56:34,656 INFO L124 PetriNetUnfolderBase]: 1387/2358 cut-off events. [2024-06-21 15:56:34,656 INFO L125 PetriNetUnfolderBase]: For 83862/83862 co-relation queries the response was YES. [2024-06-21 15:56:34,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14354 conditions, 2358 events. 1387/2358 cut-off events. For 83862/83862 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 13336 event pairs, 320 based on Foata normal form. 16/2372 useless extension candidates. Maximal degree in co-relation 14276. Up to 1884 conditions per place. [2024-06-21 15:56:34,676 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 159 selfloop transitions, 49 changer transitions 0/216 dead transitions. [2024-06-21 15:56:34,676 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 216 transitions, 2351 flow [2024-06-21 15:56:34,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:56:34,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:56:34,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 203 transitions. [2024-06-21 15:56:34,677 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6189024390243902 [2024-06-21 15:56:34,677 INFO L175 Difference]: Start difference. First operand has 169 places, 181 transitions, 1809 flow. Second operand 8 states and 203 transitions. [2024-06-21 15:56:34,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 216 transitions, 2351 flow [2024-06-21 15:56:34,789 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 216 transitions, 2242 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-21 15:56:34,792 INFO L231 Difference]: Finished difference. Result has 171 places, 182 transitions, 1827 flow [2024-06-21 15:56:34,793 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1700, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1827, PETRI_PLACES=171, PETRI_TRANSITIONS=182} [2024-06-21 15:56:34,793 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 129 predicate places. [2024-06-21 15:56:34,793 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 182 transitions, 1827 flow [2024-06-21 15:56:34,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 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) [2024-06-21 15:56:34,793 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:56:34,793 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:56:34,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-21 15:56:34,793 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:56:34,794 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:56:34,794 INFO L85 PathProgramCache]: Analyzing trace with hash -815540721, now seen corresponding path program 6 times [2024-06-21 15:56:34,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:56:34,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484472298] [2024-06-21 15:56:34,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:56:34,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:56:34,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:56:34,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:56:34,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:56:34,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484472298] [2024-06-21 15:56:34,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484472298] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:56:34,924 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:56:34,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:56:34,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75400751] [2024-06-21 15:56:34,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:56:34,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:56:34,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:56:34,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:56:34,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:56:34,970 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:56:34,971 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 182 transitions, 1827 flow. Second operand has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 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) [2024-06-21 15:56:34,971 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:56:34,971 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:56:34,971 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:56:35,321 INFO L124 PetriNetUnfolderBase]: 1428/2429 cut-off events. [2024-06-21 15:56:35,321 INFO L125 PetriNetUnfolderBase]: For 85668/85668 co-relation queries the response was YES. [2024-06-21 15:56:35,334 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14734 conditions, 2429 events. 1428/2429 cut-off events. For 85668/85668 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 13894 event pairs, 313 based on Foata normal form. 12/2439 useless extension candidates. Maximal degree in co-relation 14655. Up to 1776 conditions per place. [2024-06-21 15:56:35,341 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 162 selfloop transitions, 52 changer transitions 0/222 dead transitions. [2024-06-21 15:56:35,341 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 222 transitions, 2425 flow [2024-06-21 15:56:35,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:56:35,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:56:35,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 205 transitions. [2024-06-21 15:56:35,343 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-21 15:56:35,343 INFO L175 Difference]: Start difference. First operand has 171 places, 182 transitions, 1827 flow. Second operand 8 states and 205 transitions. [2024-06-21 15:56:35,343 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 222 transitions, 2425 flow [2024-06-21 15:56:35,479 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 222 transitions, 2316 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-21 15:56:35,482 INFO L231 Difference]: Finished difference. Result has 174 places, 185 transitions, 1889 flow [2024-06-21 15:56:35,482 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1718, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1889, PETRI_PLACES=174, PETRI_TRANSITIONS=185} [2024-06-21 15:56:35,483 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 132 predicate places. [2024-06-21 15:56:35,483 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 185 transitions, 1889 flow [2024-06-21 15:56:35,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 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) [2024-06-21 15:56:35,483 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:56:35,483 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:56:35,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-21 15:56:35,483 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:56:35,484 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:56:35,484 INFO L85 PathProgramCache]: Analyzing trace with hash -1156825231, now seen corresponding path program 1 times [2024-06-21 15:56:35,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:56:35,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337044132] [2024-06-21 15:56:35,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:56:35,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:56:35,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:56:35,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:56:35,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:56:35,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337044132] [2024-06-21 15:56:35,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337044132] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:56:35,610 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:56:35,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:56:35,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831712725] [2024-06-21 15:56:35,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:56:35,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:56:35,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:56:35,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:56:35,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:56:35,676 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:56:35,677 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 185 transitions, 1889 flow. Second operand has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 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) [2024-06-21 15:56:35,677 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:56:35,677 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:56:35,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:56:36,084 INFO L124 PetriNetUnfolderBase]: 1469/2500 cut-off events. [2024-06-21 15:56:36,084 INFO L125 PetriNetUnfolderBase]: For 90580/90580 co-relation queries the response was YES. [2024-06-21 15:56:36,097 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15205 conditions, 2500 events. 1469/2500 cut-off events. For 90580/90580 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 14431 event pairs, 321 based on Foata normal form. 12/2510 useless extension candidates. Maximal degree in co-relation 15124. Up to 1755 conditions per place. [2024-06-21 15:56:36,105 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 161 selfloop transitions, 54 changer transitions 0/223 dead transitions. [2024-06-21 15:56:36,105 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 223 transitions, 2467 flow [2024-06-21 15:56:36,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:56:36,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:56:36,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 204 transitions. [2024-06-21 15:56:36,106 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6219512195121951 [2024-06-21 15:56:36,106 INFO L175 Difference]: Start difference. First operand has 174 places, 185 transitions, 1889 flow. Second operand 8 states and 204 transitions. [2024-06-21 15:56:36,106 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 223 transitions, 2467 flow [2024-06-21 15:56:36,233 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 223 transitions, 2385 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-21 15:56:36,235 INFO L231 Difference]: Finished difference. Result has 178 places, 186 transitions, 1947 flow [2024-06-21 15:56:36,236 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1807, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1947, PETRI_PLACES=178, PETRI_TRANSITIONS=186} [2024-06-21 15:56:36,236 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 136 predicate places. [2024-06-21 15:56:36,236 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 186 transitions, 1947 flow [2024-06-21 15:56:36,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 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) [2024-06-21 15:56:36,237 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:56:36,237 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:56:36,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-21 15:56:36,237 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:56:36,238 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:56:36,238 INFO L85 PathProgramCache]: Analyzing trace with hash -1258816957, now seen corresponding path program 7 times [2024-06-21 15:56:36,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:56:36,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039497410] [2024-06-21 15:56:36,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:56:36,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:56:36,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:56:36,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:56:36,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:56:36,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039497410] [2024-06-21 15:56:36,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039497410] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:56:36,378 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:56:36,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:56:36,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439118577] [2024-06-21 15:56:36,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:56:36,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:56:36,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:56:36,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:56:36,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:56:36,424 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:56:36,425 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 186 transitions, 1947 flow. Second operand has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 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) [2024-06-21 15:56:36,425 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:56:36,425 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:56:36,425 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:56:36,747 INFO L124 PetriNetUnfolderBase]: 1527/2598 cut-off events. [2024-06-21 15:56:36,747 INFO L125 PetriNetUnfolderBase]: For 98603/98603 co-relation queries the response was YES. [2024-06-21 15:56:36,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15959 conditions, 2598 events. 1527/2598 cut-off events. For 98603/98603 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 15255 event pairs, 361 based on Foata normal form. 16/2611 useless extension candidates. Maximal degree in co-relation 15876. Up to 2124 conditions per place. [2024-06-21 15:56:36,769 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 161 selfloop transitions, 49 changer transitions 0/218 dead transitions. [2024-06-21 15:56:36,769 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 218 transitions, 2491 flow [2024-06-21 15:56:36,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:56:36,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:56:36,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 200 transitions. [2024-06-21 15:56:36,770 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-21 15:56:36,771 INFO L175 Difference]: Start difference. First operand has 178 places, 186 transitions, 1947 flow. Second operand 8 states and 200 transitions. [2024-06-21 15:56:36,771 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 218 transitions, 2491 flow [2024-06-21 15:56:36,903 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 218 transitions, 2365 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-21 15:56:36,906 INFO L231 Difference]: Finished difference. Result has 180 places, 187 transitions, 1954 flow [2024-06-21 15:56:36,906 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1821, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1954, PETRI_PLACES=180, PETRI_TRANSITIONS=187} [2024-06-21 15:56:36,907 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 138 predicate places. [2024-06-21 15:56:36,907 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 187 transitions, 1954 flow [2024-06-21 15:56:36,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 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) [2024-06-21 15:56:36,907 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:56:36,907 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:56:36,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-21 15:56:36,907 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:56:36,908 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:56:36,908 INFO L85 PathProgramCache]: Analyzing trace with hash 1990936287, now seen corresponding path program 8 times [2024-06-21 15:56:36,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:56:36,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601869910] [2024-06-21 15:56:36,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:56:36,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:56:36,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:56:37,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:56:37,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:56:37,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601869910] [2024-06-21 15:56:37,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601869910] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:56:37,056 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:56:37,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:56:37,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508549758] [2024-06-21 15:56:37,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:56:37,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:56:37,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:56:37,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:56:37,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:56:37,109 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:56:37,109 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 187 transitions, 1954 flow. Second operand has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 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) [2024-06-21 15:56:37,109 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:56:37,110 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:56:37,110 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:56:37,476 INFO L124 PetriNetUnfolderBase]: 1585/2696 cut-off events. [2024-06-21 15:56:37,477 INFO L125 PetriNetUnfolderBase]: For 104372/104372 co-relation queries the response was YES. [2024-06-21 15:56:37,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16461 conditions, 2696 events. 1585/2696 cut-off events. For 104372/104372 co-relation queries the response was YES. Maximal size of possible extension queue 180. Compared 15950 event pairs, 371 based on Foata normal form. 16/2709 useless extension candidates. Maximal degree in co-relation 16377. Up to 2222 conditions per place. [2024-06-21 15:56:37,496 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 161 selfloop transitions, 50 changer transitions 0/219 dead transitions. [2024-06-21 15:56:37,496 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 219 transitions, 2502 flow [2024-06-21 15:56:37,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:56:37,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:56:37,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-06-21 15:56:37,497 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6067073170731707 [2024-06-21 15:56:37,497 INFO L175 Difference]: Start difference. First operand has 180 places, 187 transitions, 1954 flow. Second operand 8 states and 199 transitions. [2024-06-21 15:56:37,498 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 219 transitions, 2502 flow [2024-06-21 15:56:37,660 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 219 transitions, 2387 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-21 15:56:37,662 INFO L231 Difference]: Finished difference. Result has 182 places, 188 transitions, 1976 flow [2024-06-21 15:56:37,663 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1839, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1976, PETRI_PLACES=182, PETRI_TRANSITIONS=188} [2024-06-21 15:56:37,663 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 140 predicate places. [2024-06-21 15:56:37,663 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 188 transitions, 1976 flow [2024-06-21 15:56:37,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 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) [2024-06-21 15:56:37,664 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:56:37,664 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:56:37,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-21 15:56:37,664 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:56:37,664 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:56:37,664 INFO L85 PathProgramCache]: Analyzing trace with hash 471443875, now seen corresponding path program 9 times [2024-06-21 15:56:37,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:56:37,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009181093] [2024-06-21 15:56:37,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:56:37,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:56:37,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:56:37,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:56:37,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:56:37,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009181093] [2024-06-21 15:56:37,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009181093] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:56:37,797 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:56:37,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:56:37,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097193524] [2024-06-21 15:56:37,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:56:37,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:56:37,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:56:37,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:56:37,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:56:37,864 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:56:37,864 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 188 transitions, 1976 flow. Second operand has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 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) [2024-06-21 15:56:37,864 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:56:37,864 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:56:37,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:56:38,208 INFO L124 PetriNetUnfolderBase]: 1643/2804 cut-off events. [2024-06-21 15:56:38,208 INFO L125 PetriNetUnfolderBase]: For 109664/109664 co-relation queries the response was YES. [2024-06-21 15:56:38,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17015 conditions, 2804 events. 1643/2804 cut-off events. For 109664/109664 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 16801 event pairs, 386 based on Foata normal form. 16/2817 useless extension candidates. Maximal degree in co-relation 16930. Up to 2320 conditions per place. [2024-06-21 15:56:38,231 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 160 selfloop transitions, 52 changer transitions 0/220 dead transitions. [2024-06-21 15:56:38,232 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 220 transitions, 2528 flow [2024-06-21 15:56:38,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:56:38,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:56:38,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-06-21 15:56:38,235 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6036585365853658 [2024-06-21 15:56:38,235 INFO L175 Difference]: Start difference. First operand has 182 places, 188 transitions, 1976 flow. Second operand 8 states and 198 transitions. [2024-06-21 15:56:38,235 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 220 transitions, 2528 flow [2024-06-21 15:56:38,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 220 transitions, 2409 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-21 15:56:38,409 INFO L231 Difference]: Finished difference. Result has 184 places, 189 transitions, 2000 flow [2024-06-21 15:56:38,409 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1857, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2000, PETRI_PLACES=184, PETRI_TRANSITIONS=189} [2024-06-21 15:56:38,409 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 142 predicate places. [2024-06-21 15:56:38,409 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 189 transitions, 2000 flow [2024-06-21 15:56:38,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 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) [2024-06-21 15:56:38,410 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:56:38,410 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:56:38,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-21 15:56:38,410 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:56:38,410 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:56:38,410 INFO L85 PathProgramCache]: Analyzing trace with hash 1990932567, now seen corresponding path program 10 times [2024-06-21 15:56:38,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:56:38,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137575035] [2024-06-21 15:56:38,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:56:38,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:56:38,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:56:38,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:56:38,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:56:38,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137575035] [2024-06-21 15:56:38,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137575035] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:56:38,593 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:56:38,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:56:38,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938690379] [2024-06-21 15:56:38,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:56:38,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:56:38,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:56:38,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:56:38,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:56:38,647 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:56:38,648 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 189 transitions, 2000 flow. Second operand has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 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) [2024-06-21 15:56:38,648 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:56:38,648 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:56:38,648 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:56:39,080 INFO L124 PetriNetUnfolderBase]: 1659/2836 cut-off events. [2024-06-21 15:56:39,080 INFO L125 PetriNetUnfolderBase]: For 107821/107821 co-relation queries the response was YES. [2024-06-21 15:56:39,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16982 conditions, 2836 events. 1659/2836 cut-off events. For 107821/107821 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 17056 event pairs, 377 based on Foata normal form. 12/2845 useless extension candidates. Maximal degree in co-relation 16896. Up to 2081 conditions per place. [2024-06-21 15:56:39,111 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 164 selfloop transitions, 54 changer transitions 0/226 dead transitions. [2024-06-21 15:56:39,111 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 226 transitions, 2618 flow [2024-06-21 15:56:39,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:56:39,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:56:39,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 201 transitions. [2024-06-21 15:56:39,112 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6128048780487805 [2024-06-21 15:56:39,112 INFO L175 Difference]: Start difference. First operand has 184 places, 189 transitions, 2000 flow. Second operand 8 states and 201 transitions. [2024-06-21 15:56:39,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 226 transitions, 2618 flow [2024-06-21 15:56:39,299 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 226 transitions, 2493 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-21 15:56:39,302 INFO L231 Difference]: Finished difference. Result has 187 places, 192 transitions, 2073 flow [2024-06-21 15:56:39,303 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1875, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2073, PETRI_PLACES=187, PETRI_TRANSITIONS=192} [2024-06-21 15:56:39,303 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 145 predicate places. [2024-06-21 15:56:39,303 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 192 transitions, 2073 flow [2024-06-21 15:56:39,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 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) [2024-06-21 15:56:39,303 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:56:39,304 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:56:39,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-21 15:56:39,304 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:56:39,304 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:56:39,304 INFO L85 PathProgramCache]: Analyzing trace with hash -413106319, now seen corresponding path program 2 times [2024-06-21 15:56:39,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:56:39,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935991012] [2024-06-21 15:56:39,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:56:39,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:56:39,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:56:39,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:56:39,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:56:39,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935991012] [2024-06-21 15:56:39,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935991012] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:56:39,434 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:56:39,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:56:39,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517685705] [2024-06-21 15:56:39,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:56:39,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:56:39,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:56:39,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:56:39,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:56:39,484 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:56:39,484 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 192 transitions, 2073 flow. Second operand has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 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) [2024-06-21 15:56:39,484 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:56:39,485 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:56:39,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:56:39,969 INFO L124 PetriNetUnfolderBase]: 1700/2912 cut-off events. [2024-06-21 15:56:39,969 INFO L125 PetriNetUnfolderBase]: For 113297/113297 co-relation queries the response was YES. [2024-06-21 15:56:39,983 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17446 conditions, 2912 events. 1700/2912 cut-off events. For 113297/113297 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 17692 event pairs, 394 based on Foata normal form. 12/2921 useless extension candidates. Maximal degree in co-relation 17358. Up to 2336 conditions per place. [2024-06-21 15:56:39,990 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 165 selfloop transitions, 54 changer transitions 0/227 dead transitions. [2024-06-21 15:56:39,990 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 227 transitions, 2661 flow [2024-06-21 15:56:39,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:56:39,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:56:39,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 201 transitions. [2024-06-21 15:56:39,991 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6128048780487805 [2024-06-21 15:56:39,991 INFO L175 Difference]: Start difference. First operand has 187 places, 192 transitions, 2073 flow. Second operand 8 states and 201 transitions. [2024-06-21 15:56:39,991 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 227 transitions, 2661 flow [2024-06-21 15:56:40,174 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 227 transitions, 2559 flow, removed 23 selfloop flow, removed 4 redundant places. [2024-06-21 15:56:40,177 INFO L231 Difference]: Finished difference. Result has 191 places, 193 transitions, 2121 flow [2024-06-21 15:56:40,177 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1971, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2121, PETRI_PLACES=191, PETRI_TRANSITIONS=193} [2024-06-21 15:56:40,177 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 149 predicate places. [2024-06-21 15:56:40,178 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 193 transitions, 2121 flow [2024-06-21 15:56:40,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 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) [2024-06-21 15:56:40,178 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:56:40,178 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:56:40,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-21 15:56:40,178 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:56:40,179 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:56:40,179 INFO L85 PathProgramCache]: Analyzing trace with hash 148754289, now seen corresponding path program 3 times [2024-06-21 15:56:40,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:56:40,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380911984] [2024-06-21 15:56:40,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:56:40,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:56:40,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:56:40,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:56:40,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:56:40,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380911984] [2024-06-21 15:56:40,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380911984] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:56:40,317 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:56:40,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:56:40,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587847650] [2024-06-21 15:56:40,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:56:40,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:56:40,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:56:40,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:56:40,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:56:40,382 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:56:40,382 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 193 transitions, 2121 flow. Second operand has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 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) [2024-06-21 15:56:40,382 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:56:40,383 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:56:40,383 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:56:40,796 INFO L124 PetriNetUnfolderBase]: 1741/3003 cut-off events. [2024-06-21 15:56:40,796 INFO L125 PetriNetUnfolderBase]: For 118015/118015 co-relation queries the response was YES. [2024-06-21 15:56:40,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18007 conditions, 3003 events. 1741/3003 cut-off events. For 118015/118015 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 18477 event pairs, 368 based on Foata normal form. 12/3012 useless extension candidates. Maximal degree in co-relation 17917. Up to 1637 conditions per place. [2024-06-21 15:56:40,828 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 156 selfloop transitions, 66 changer transitions 0/230 dead transitions. [2024-06-21 15:56:40,828 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 230 transitions, 2811 flow [2024-06-21 15:56:40,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:56:40,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:56:40,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-06-21 15:56:40,829 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6158536585365854 [2024-06-21 15:56:40,829 INFO L175 Difference]: Start difference. First operand has 191 places, 193 transitions, 2121 flow. Second operand 8 states and 202 transitions. [2024-06-21 15:56:40,829 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 230 transitions, 2811 flow [2024-06-21 15:56:41,001 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 230 transitions, 2675 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-21 15:56:41,003 INFO L231 Difference]: Finished difference. Result has 193 places, 194 transitions, 2159 flow [2024-06-21 15:56:41,003 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1985, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2159, PETRI_PLACES=193, PETRI_TRANSITIONS=194} [2024-06-21 15:56:41,004 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 151 predicate places. [2024-06-21 15:56:41,004 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 194 transitions, 2159 flow [2024-06-21 15:56:41,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 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) [2024-06-21 15:56:41,004 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:56:41,004 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:56:41,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-21 15:56:41,004 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:56:41,005 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:56:41,005 INFO L85 PathProgramCache]: Analyzing trace with hash -2096960557, now seen corresponding path program 4 times [2024-06-21 15:56:41,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:56:41,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536108194] [2024-06-21 15:56:41,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:56:41,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:56:41,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:56:41,135 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:56:41,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:56:41,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536108194] [2024-06-21 15:56:41,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536108194] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:56:41,136 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:56:41,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:56:41,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165662816] [2024-06-21 15:56:41,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:56:41,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:56:41,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:56:41,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:56:41,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:56:41,212 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:56:41,213 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 194 transitions, 2159 flow. Second operand has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 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) [2024-06-21 15:56:41,213 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:56:41,213 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:56:41,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:56:41,615 INFO L124 PetriNetUnfolderBase]: 1721/2961 cut-off events. [2024-06-21 15:56:41,615 INFO L125 PetriNetUnfolderBase]: For 110823/110823 co-relation queries the response was YES. [2024-06-21 15:56:41,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17359 conditions, 2961 events. 1721/2961 cut-off events. For 110823/110823 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 18139 event pairs, 395 based on Foata normal form. 12/2970 useless extension candidates. Maximal degree in co-relation 17268. Up to 2283 conditions per place. [2024-06-21 15:56:41,640 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 167 selfloop transitions, 52 changer transitions 0/227 dead transitions. [2024-06-21 15:56:41,640 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 227 transitions, 2629 flow [2024-06-21 15:56:41,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:56:41,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:56:41,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 201 transitions. [2024-06-21 15:56:41,641 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6128048780487805 [2024-06-21 15:56:41,641 INFO L175 Difference]: Start difference. First operand has 193 places, 194 transitions, 2159 flow. Second operand 8 states and 201 transitions. [2024-06-21 15:56:41,641 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 227 transitions, 2629 flow [2024-06-21 15:56:41,867 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 227 transitions, 2495 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-21 15:56:41,869 INFO L231 Difference]: Finished difference. Result has 195 places, 193 transitions, 2049 flow [2024-06-21 15:56:41,870 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1941, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2049, PETRI_PLACES=195, PETRI_TRANSITIONS=193} [2024-06-21 15:56:41,870 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 153 predicate places. [2024-06-21 15:56:41,870 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 193 transitions, 2049 flow [2024-06-21 15:56:41,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 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) [2024-06-21 15:56:41,870 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:56:41,871 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:56:41,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-21 15:56:41,871 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:56:41,871 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:56:41,871 INFO L85 PathProgramCache]: Analyzing trace with hash 1010034501, now seen corresponding path program 1 times [2024-06-21 15:56:41,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:56:41,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700501941] [2024-06-21 15:56:41,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:56:41,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:56:41,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:56:41,987 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:56:41,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:56:41,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700501941] [2024-06-21 15:56:41,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700501941] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:56:41,988 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:56:41,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:56:41,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068110355] [2024-06-21 15:56:41,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:56:41,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:56:41,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:56:41,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:56:41,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:56:42,036 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:56:42,037 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 193 transitions, 2049 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:56:42,037 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:56:42,037 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:56:42,037 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:56:42,360 INFO L124 PetriNetUnfolderBase]: 1734/2991 cut-off events. [2024-06-21 15:56:42,361 INFO L125 PetriNetUnfolderBase]: For 104134/104134 co-relation queries the response was YES. [2024-06-21 15:56:42,378 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17389 conditions, 2991 events. 1734/2991 cut-off events. For 104134/104134 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 18370 event pairs, 409 based on Foata normal form. 1/2990 useless extension candidates. Maximal degree in co-relation 17297. Up to 2609 conditions per place. [2024-06-21 15:56:42,386 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 178 selfloop transitions, 48 changer transitions 0/234 dead transitions. [2024-06-21 15:56:42,386 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 234 transitions, 2939 flow [2024-06-21 15:56:42,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:56:42,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:56:42,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-21 15:56:42,387 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6132404181184669 [2024-06-21 15:56:42,387 INFO L175 Difference]: Start difference. First operand has 195 places, 193 transitions, 2049 flow. Second operand 7 states and 176 transitions. [2024-06-21 15:56:42,387 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 234 transitions, 2939 flow [2024-06-21 15:56:42,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 234 transitions, 2686 flow, removed 15 selfloop flow, removed 10 redundant places. [2024-06-21 15:56:42,636 INFO L231 Difference]: Finished difference. Result has 193 places, 209 transitions, 2121 flow [2024-06-21 15:56:42,636 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1796, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2121, PETRI_PLACES=193, PETRI_TRANSITIONS=209} [2024-06-21 15:56:42,636 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 151 predicate places. [2024-06-21 15:56:42,636 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 209 transitions, 2121 flow [2024-06-21 15:56:42,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:56:42,636 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:56:42,636 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:56:42,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-21 15:56:42,637 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:56:42,637 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:56:42,637 INFO L85 PathProgramCache]: Analyzing trace with hash -793976159, now seen corresponding path program 1 times [2024-06-21 15:56:42,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:56:42,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174966135] [2024-06-21 15:56:42,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:56:42,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:56:42,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:56:42,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:56:42,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:56:42,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174966135] [2024-06-21 15:56:42,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174966135] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:56:42,739 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:56:42,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:56:42,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490119739] [2024-06-21 15:56:42,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:56:42,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:56:42,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:56:42,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:56:42,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:56:42,773 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:56:42,774 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 209 transitions, 2121 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:56:42,774 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:56:42,774 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:56:42,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:56:43,130 INFO L124 PetriNetUnfolderBase]: 1752/3019 cut-off events. [2024-06-21 15:56:43,130 INFO L125 PetriNetUnfolderBase]: For 108021/108023 co-relation queries the response was YES. [2024-06-21 15:56:43,147 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17274 conditions, 3019 events. 1752/3019 cut-off events. For 108021/108023 co-relation queries the response was YES. Maximal size of possible extension queue 212. Compared 18583 event pairs, 404 based on Foata normal form. 3/3021 useless extension candidates. Maximal degree in co-relation 17183. Up to 2658 conditions per place. [2024-06-21 15:56:43,156 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 192 selfloop transitions, 49 changer transitions 0/249 dead transitions. [2024-06-21 15:56:43,156 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 249 transitions, 3045 flow [2024-06-21 15:56:43,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:56:43,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:56:43,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-21 15:56:43,157 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6027874564459931 [2024-06-21 15:56:43,157 INFO L175 Difference]: Start difference. First operand has 193 places, 209 transitions, 2121 flow. Second operand 7 states and 173 transitions. [2024-06-21 15:56:43,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 249 transitions, 3045 flow [2024-06-21 15:56:43,415 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 249 transitions, 2978 flow, removed 28 selfloop flow, removed 1 redundant places. [2024-06-21 15:56:43,418 INFO L231 Difference]: Finished difference. Result has 201 places, 227 transitions, 2404 flow [2024-06-21 15:56:43,418 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2057, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2404, PETRI_PLACES=201, PETRI_TRANSITIONS=227} [2024-06-21 15:56:43,418 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 159 predicate places. [2024-06-21 15:56:43,419 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 227 transitions, 2404 flow [2024-06-21 15:56:43,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:56:43,419 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:56:43,419 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:56:43,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-21 15:56:43,419 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:56:43,420 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:56:43,420 INFO L85 PathProgramCache]: Analyzing trace with hash 950531785, now seen corresponding path program 2 times [2024-06-21 15:56:43,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:56:43,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061973781] [2024-06-21 15:56:43,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:56:43,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:56:43,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:56:43,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:56:43,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:56:43,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061973781] [2024-06-21 15:56:43,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061973781] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:56:43,547 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:56:43,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:56:43,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100136005] [2024-06-21 15:56:43,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:56:43,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:56:43,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:56:43,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:56:43,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:56:43,597 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:56:43,597 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 227 transitions, 2404 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:56:43,598 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:56:43,598 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:56:43,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:56:44,170 INFO L124 PetriNetUnfolderBase]: 1757/3028 cut-off events. [2024-06-21 15:56:44,170 INFO L125 PetriNetUnfolderBase]: For 113353/113355 co-relation queries the response was YES. [2024-06-21 15:56:44,191 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17696 conditions, 3028 events. 1757/3028 cut-off events. For 113353/113355 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 18635 event pairs, 401 based on Foata normal form. 3/3030 useless extension candidates. Maximal degree in co-relation 17600. Up to 2703 conditions per place. [2024-06-21 15:56:44,198 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 207 selfloop transitions, 35 changer transitions 0/250 dead transitions. [2024-06-21 15:56:44,198 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 250 transitions, 2976 flow [2024-06-21 15:56:44,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:56:44,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:56:44,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-21 15:56:44,199 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-21 15:56:44,199 INFO L175 Difference]: Start difference. First operand has 201 places, 227 transitions, 2404 flow. Second operand 7 states and 168 transitions. [2024-06-21 15:56:44,199 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 250 transitions, 2976 flow [2024-06-21 15:56:44,420 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 250 transitions, 2911 flow, removed 24 selfloop flow, removed 1 redundant places. [2024-06-21 15:56:44,423 INFO L231 Difference]: Finished difference. Result has 207 places, 230 transitions, 2459 flow [2024-06-21 15:56:44,423 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2339, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2459, PETRI_PLACES=207, PETRI_TRANSITIONS=230} [2024-06-21 15:56:44,423 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 165 predicate places. [2024-06-21 15:56:44,423 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 230 transitions, 2459 flow [2024-06-21 15:56:44,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:56:44,424 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:56:44,424 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:56:44,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-21 15:56:44,424 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:56:44,424 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:56:44,424 INFO L85 PathProgramCache]: Analyzing trace with hash 2132536043, now seen corresponding path program 2 times [2024-06-21 15:56:44,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:56:44,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029512475] [2024-06-21 15:56:44,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:56:44,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:56:44,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:56:44,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:56:44,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:56:44,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029512475] [2024-06-21 15:56:44,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029512475] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:56:44,541 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:56:44,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:56:44,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254061636] [2024-06-21 15:56:44,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:56:44,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:56:44,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:56:44,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:56:44,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:56:44,575 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:56:44,575 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 230 transitions, 2459 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:56:44,575 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:56:44,575 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:56:44,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:56:44,993 INFO L124 PetriNetUnfolderBase]: 1788/3077 cut-off events. [2024-06-21 15:56:44,993 INFO L125 PetriNetUnfolderBase]: For 120421/120423 co-relation queries the response was YES. [2024-06-21 15:56:45,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18281 conditions, 3077 events. 1788/3077 cut-off events. For 120421/120423 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 18936 event pairs, 404 based on Foata normal form. 3/3079 useless extension candidates. Maximal degree in co-relation 18183. Up to 2697 conditions per place. [2024-06-21 15:56:45,023 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 194 selfloop transitions, 63 changer transitions 0/265 dead transitions. [2024-06-21 15:56:45,023 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 265 transitions, 3446 flow [2024-06-21 15:56:45,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:56:45,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:56:45,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-21 15:56:45,024 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5923344947735192 [2024-06-21 15:56:45,024 INFO L175 Difference]: Start difference. First operand has 207 places, 230 transitions, 2459 flow. Second operand 7 states and 170 transitions. [2024-06-21 15:56:45,024 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 265 transitions, 3446 flow [2024-06-21 15:56:45,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 265 transitions, 3330 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-21 15:56:45,308 INFO L231 Difference]: Finished difference. Result has 209 places, 246 transitions, 2720 flow [2024-06-21 15:56:45,308 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2359, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2720, PETRI_PLACES=209, PETRI_TRANSITIONS=246} [2024-06-21 15:56:45,309 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 167 predicate places. [2024-06-21 15:56:45,309 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 246 transitions, 2720 flow [2024-06-21 15:56:45,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:56:45,309 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:56:45,309 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:56:45,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-21 15:56:45,309 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:56:45,309 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:56:45,309 INFO L85 PathProgramCache]: Analyzing trace with hash 2132298893, now seen corresponding path program 3 times [2024-06-21 15:56:45,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:56:45,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617592612] [2024-06-21 15:56:45,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:56:45,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:56:45,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:56:45,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:56:45,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:56:45,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617592612] [2024-06-21 15:56:45,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617592612] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:56:45,408 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:56:45,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:56:45,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114227266] [2024-06-21 15:56:45,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:56:45,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:56:45,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:56:45,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:56:45,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:56:45,448 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:56:45,449 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 246 transitions, 2720 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:56:45,449 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:56:45,449 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:56:45,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:56:45,844 INFO L124 PetriNetUnfolderBase]: 1785/3075 cut-off events. [2024-06-21 15:56:45,845 INFO L125 PetriNetUnfolderBase]: For 123570/123572 co-relation queries the response was YES. [2024-06-21 15:56:45,865 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18343 conditions, 3075 events. 1785/3075 cut-off events. For 123570/123572 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 19002 event pairs, 404 based on Foata normal form. 3/3077 useless extension candidates. Maximal degree in co-relation 18244. Up to 2694 conditions per place. [2024-06-21 15:56:45,875 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 196 selfloop transitions, 61 changer transitions 0/265 dead transitions. [2024-06-21 15:56:45,876 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 265 transitions, 3484 flow [2024-06-21 15:56:45,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:56:45,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:56:45,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-21 15:56:45,877 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5958188153310104 [2024-06-21 15:56:45,877 INFO L175 Difference]: Start difference. First operand has 209 places, 246 transitions, 2720 flow. Second operand 7 states and 171 transitions. [2024-06-21 15:56:45,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 265 transitions, 3484 flow [2024-06-21 15:56:46,226 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 265 transitions, 3362 flow, removed 29 selfloop flow, removed 2 redundant places. [2024-06-21 15:56:46,229 INFO L231 Difference]: Finished difference. Result has 214 places, 246 transitions, 2726 flow [2024-06-21 15:56:46,229 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2598, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2726, PETRI_PLACES=214, PETRI_TRANSITIONS=246} [2024-06-21 15:56:46,230 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 172 predicate places. [2024-06-21 15:56:46,230 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 246 transitions, 2726 flow [2024-06-21 15:56:46,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:56:46,230 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:56:46,230 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:56:46,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-21 15:56:46,231 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:56:46,231 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:56:46,231 INFO L85 PathProgramCache]: Analyzing trace with hash 2132298707, now seen corresponding path program 3 times [2024-06-21 15:56:46,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:56:46,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930665733] [2024-06-21 15:56:46,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:56:46,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:56:46,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:56:46,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:56:46,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:56:46,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930665733] [2024-06-21 15:56:46,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930665733] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:56:46,345 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:56:46,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:56:46,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705792087] [2024-06-21 15:56:46,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:56:46,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:56:46,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:56:46,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:56:46,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:56:46,409 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:56:46,410 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 246 transitions, 2726 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:56:46,410 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:56:46,410 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:56:46,410 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:56:46,838 INFO L124 PetriNetUnfolderBase]: 1798/3095 cut-off events. [2024-06-21 15:56:46,838 INFO L125 PetriNetUnfolderBase]: For 129706/129708 co-relation queries the response was YES. [2024-06-21 15:56:46,922 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18590 conditions, 3095 events. 1798/3095 cut-off events. For 129706/129708 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 19133 event pairs, 401 based on Foata normal form. 3/3097 useless extension candidates. Maximal degree in co-relation 18490. Up to 2751 conditions per place. [2024-06-21 15:56:46,933 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 215 selfloop transitions, 48 changer transitions 0/271 dead transitions. [2024-06-21 15:56:46,933 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 271 transitions, 3492 flow [2024-06-21 15:56:46,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:56:46,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:56:46,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 185 transitions. [2024-06-21 15:56:46,934 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5640243902439024 [2024-06-21 15:56:46,934 INFO L175 Difference]: Start difference. First operand has 214 places, 246 transitions, 2726 flow. Second operand 8 states and 185 transitions. [2024-06-21 15:56:46,934 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 271 transitions, 3492 flow [2024-06-21 15:56:47,336 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 271 transitions, 3373 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-06-21 15:56:47,339 INFO L231 Difference]: Finished difference. Result has 220 places, 252 transitions, 2819 flow [2024-06-21 15:56:47,339 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2607, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2819, PETRI_PLACES=220, PETRI_TRANSITIONS=252} [2024-06-21 15:56:47,339 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 178 predicate places. [2024-06-21 15:56:47,339 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 252 transitions, 2819 flow [2024-06-21 15:56:47,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:56:47,340 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:56:47,340 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:56:47,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-21 15:56:47,340 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:56:47,340 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:56:47,340 INFO L85 PathProgramCache]: Analyzing trace with hash 2132544971, now seen corresponding path program 1 times [2024-06-21 15:56:47,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:56:47,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279120202] [2024-06-21 15:56:47,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:56:47,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:56:47,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:56:47,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:56:47,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:56:47,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279120202] [2024-06-21 15:56:47,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279120202] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:56:47,467 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:56:47,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:56:47,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055736411] [2024-06-21 15:56:47,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:56:47,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:56:47,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:56:47,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:56:47,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:56:47,534 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-21 15:56:47,535 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 252 transitions, 2819 flow. Second operand has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:56:47,535 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:56:47,535 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-21 15:56:47,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:56:47,994 INFO L124 PetriNetUnfolderBase]: 1733/3015 cut-off events. [2024-06-21 15:56:47,995 INFO L125 PetriNetUnfolderBase]: For 146227/146227 co-relation queries the response was YES. [2024-06-21 15:56:48,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18365 conditions, 3015 events. 1733/3015 cut-off events. For 146227/146227 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 18760 event pairs, 382 based on Foata normal form. 10/2993 useless extension candidates. Maximal degree in co-relation 18263. Up to 2546 conditions per place. [2024-06-21 15:56:48,023 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 199 selfloop transitions, 37 changer transitions 0/274 dead transitions. [2024-06-21 15:56:48,023 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 274 transitions, 3375 flow [2024-06-21 15:56:48,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:56:48,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:56:48,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-21 15:56:48,024 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5993031358885017 [2024-06-21 15:56:48,024 INFO L175 Difference]: Start difference. First operand has 220 places, 252 transitions, 2819 flow. Second operand 7 states and 172 transitions. [2024-06-21 15:56:48,024 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 274 transitions, 3375 flow [2024-06-21 15:56:48,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 274 transitions, 3240 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-21 15:56:48,280 INFO L231 Difference]: Finished difference. Result has 222 places, 253 transitions, 2778 flow [2024-06-21 15:56:48,280 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2684, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2778, PETRI_PLACES=222, PETRI_TRANSITIONS=253} [2024-06-21 15:56:48,281 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 180 predicate places. [2024-06-21 15:56:48,281 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 253 transitions, 2778 flow [2024-06-21 15:56:48,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:56:48,281 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:56:48,281 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:56:48,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-21 15:56:48,281 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:56:48,282 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:56:48,282 INFO L85 PathProgramCache]: Analyzing trace with hash -2097270655, now seen corresponding path program 4 times [2024-06-21 15:56:48,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:56:48,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309691724] [2024-06-21 15:56:48,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:56:48,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:56:48,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:56:48,372 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:56:48,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:56:48,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309691724] [2024-06-21 15:56:48,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309691724] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:56:48,373 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:56:48,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:56:48,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73469539] [2024-06-21 15:56:48,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:56:48,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:56:48,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:56:48,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:56:48,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:56:48,421 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:56:48,421 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 253 transitions, 2778 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:56:48,421 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:56:48,421 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:56:48,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:56:48,869 INFO L124 PetriNetUnfolderBase]: 1847/3165 cut-off events. [2024-06-21 15:56:48,869 INFO L125 PetriNetUnfolderBase]: For 141241/141241 co-relation queries the response was YES. [2024-06-21 15:56:48,886 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19216 conditions, 3165 events. 1847/3165 cut-off events. For 141241/141241 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 19563 event pairs, 408 based on Foata normal form. 1/3164 useless extension candidates. Maximal degree in co-relation 19114. Up to 2756 conditions per place. [2024-06-21 15:56:48,894 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 198 selfloop transitions, 75 changer transitions 0/281 dead transitions. [2024-06-21 15:56:48,895 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 281 transitions, 3698 flow [2024-06-21 15:56:48,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:56:48,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:56:48,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-21 15:56:48,896 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5993031358885017 [2024-06-21 15:56:48,896 INFO L175 Difference]: Start difference. First operand has 222 places, 253 transitions, 2778 flow. Second operand 7 states and 172 transitions. [2024-06-21 15:56:48,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 281 transitions, 3698 flow [2024-06-21 15:56:49,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 281 transitions, 3624 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-21 15:56:49,213 INFO L231 Difference]: Finished difference. Result has 224 places, 259 transitions, 2964 flow [2024-06-21 15:56:49,213 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2704, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2964, PETRI_PLACES=224, PETRI_TRANSITIONS=259} [2024-06-21 15:56:49,213 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 182 predicate places. [2024-06-21 15:56:49,213 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 259 transitions, 2964 flow [2024-06-21 15:56:49,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:56:49,214 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:56:49,214 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:56:49,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-21 15:56:49,214 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:56:49,214 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:56:49,214 INFO L85 PathProgramCache]: Analyzing trace with hash -2084890495, now seen corresponding path program 5 times [2024-06-21 15:56:49,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:56:49,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80899785] [2024-06-21 15:56:49,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:56:49,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:56:49,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:56:49,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:56:49,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:56:49,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80899785] [2024-06-21 15:56:49,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80899785] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:56:49,310 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:56:49,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:56:49,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76076432] [2024-06-21 15:56:49,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:56:49,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:56:49,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:56:49,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:56:49,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:56:49,357 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:56:49,357 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 259 transitions, 2964 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:56:49,357 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:56:49,358 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:56:49,358 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:56:49,793 INFO L124 PetriNetUnfolderBase]: 1860/3191 cut-off events. [2024-06-21 15:56:49,793 INFO L125 PetriNetUnfolderBase]: For 147476/147476 co-relation queries the response was YES. [2024-06-21 15:56:49,816 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19611 conditions, 3191 events. 1860/3191 cut-off events. For 147476/147476 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 19759 event pairs, 412 based on Foata normal form. 1/3190 useless extension candidates. Maximal degree in co-relation 19508. Up to 2771 conditions per place. [2024-06-21 15:56:49,828 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 195 selfloop transitions, 82 changer transitions 0/285 dead transitions. [2024-06-21 15:56:49,828 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 285 transitions, 3913 flow [2024-06-21 15:56:49,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:56:49,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:56:49,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-06-21 15:56:49,829 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5888501742160279 [2024-06-21 15:56:49,829 INFO L175 Difference]: Start difference. First operand has 224 places, 259 transitions, 2964 flow. Second operand 7 states and 169 transitions. [2024-06-21 15:56:49,829 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 285 transitions, 3913 flow [2024-06-21 15:56:50,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 285 transitions, 3715 flow, removed 48 selfloop flow, removed 3 redundant places. [2024-06-21 15:56:50,242 INFO L231 Difference]: Finished difference. Result has 228 places, 266 transitions, 3065 flow [2024-06-21 15:56:50,242 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2801, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3065, PETRI_PLACES=228, PETRI_TRANSITIONS=266} [2024-06-21 15:56:50,242 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 186 predicate places. [2024-06-21 15:56:50,243 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 266 transitions, 3065 flow [2024-06-21 15:56:50,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:56:50,243 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:56:50,243 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:56:50,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-21 15:56:50,243 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:56:50,244 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:56:50,244 INFO L85 PathProgramCache]: Analyzing trace with hash 1941196131, now seen corresponding path program 6 times [2024-06-21 15:56:50,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:56:50,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989020180] [2024-06-21 15:56:50,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:56:50,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:56:50,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:56:50,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:56:50,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:56:50,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989020180] [2024-06-21 15:56:50,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989020180] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:56:50,337 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:56:50,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:56:50,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991795155] [2024-06-21 15:56:50,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:56:50,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:56:50,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:56:50,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:56:50,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:56:50,375 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:56:50,375 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 266 transitions, 3065 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:56:50,375 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:56:50,375 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:56:50,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:56:50,836 INFO L124 PetriNetUnfolderBase]: 1857/3187 cut-off events. [2024-06-21 15:56:50,836 INFO L125 PetriNetUnfolderBase]: For 150565/150565 co-relation queries the response was YES. [2024-06-21 15:56:50,855 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19542 conditions, 3187 events. 1857/3187 cut-off events. For 150565/150565 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 19755 event pairs, 412 based on Foata normal form. 1/3186 useless extension candidates. Maximal degree in co-relation 19438. Up to 2768 conditions per place. [2024-06-21 15:56:50,864 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 203 selfloop transitions, 78 changer transitions 0/289 dead transitions. [2024-06-21 15:56:50,865 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 289 transitions, 4019 flow [2024-06-21 15:56:50,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:56:50,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:56:50,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-06-21 15:56:50,866 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6062717770034843 [2024-06-21 15:56:50,866 INFO L175 Difference]: Start difference. First operand has 228 places, 266 transitions, 3065 flow. Second operand 7 states and 174 transitions. [2024-06-21 15:56:50,866 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 289 transitions, 4019 flow [2024-06-21 15:56:51,286 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 289 transitions, 3859 flow, removed 29 selfloop flow, removed 3 redundant places. [2024-06-21 15:56:51,290 INFO L231 Difference]: Finished difference. Result has 232 places, 266 transitions, 3067 flow [2024-06-21 15:56:51,290 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2905, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3067, PETRI_PLACES=232, PETRI_TRANSITIONS=266} [2024-06-21 15:56:51,291 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 190 predicate places. [2024-06-21 15:56:51,291 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 266 transitions, 3067 flow [2024-06-21 15:56:51,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:56:51,291 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:56:51,291 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:56:51,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-21 15:56:51,292 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:56:51,292 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:56:51,292 INFO L85 PathProgramCache]: Analyzing trace with hash 1941316287, now seen corresponding path program 4 times [2024-06-21 15:56:51,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:56:51,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999084323] [2024-06-21 15:56:51,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:56:51,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:56:51,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:56:51,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:56:51,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:56:51,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999084323] [2024-06-21 15:56:51,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999084323] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:56:51,390 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:56:51,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:56:51,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659053787] [2024-06-21 15:56:51,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:56:51,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:56:51,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:56:51,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:56:51,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:56:51,423 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:56:51,424 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 266 transitions, 3067 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:56:51,424 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:56:51,424 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:56:51,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:56:51,832 INFO L124 PetriNetUnfolderBase]: 1854/3183 cut-off events. [2024-06-21 15:56:51,833 INFO L125 PetriNetUnfolderBase]: For 154047/154047 co-relation queries the response was YES. [2024-06-21 15:56:51,865 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19527 conditions, 3183 events. 1854/3183 cut-off events. For 154047/154047 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 19776 event pairs, 416 based on Foata normal form. 1/3182 useless extension candidates. Maximal degree in co-relation 19422. Up to 2797 conditions per place. [2024-06-21 15:56:51,878 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 214 selfloop transitions, 65 changer transitions 0/287 dead transitions. [2024-06-21 15:56:51,878 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 287 transitions, 3934 flow [2024-06-21 15:56:51,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:56:51,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:56:51,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-21 15:56:51,879 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5923344947735192 [2024-06-21 15:56:51,879 INFO L175 Difference]: Start difference. First operand has 232 places, 266 transitions, 3067 flow. Second operand 7 states and 170 transitions. [2024-06-21 15:56:51,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 287 transitions, 3934 flow [2024-06-21 15:56:52,300 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 287 transitions, 3762 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-21 15:56:52,304 INFO L231 Difference]: Finished difference. Result has 235 places, 268 transitions, 3066 flow [2024-06-21 15:56:52,304 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2903, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3066, PETRI_PLACES=235, PETRI_TRANSITIONS=268} [2024-06-21 15:56:52,304 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 193 predicate places. [2024-06-21 15:56:52,305 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 268 transitions, 3066 flow [2024-06-21 15:56:52,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:56:52,305 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:56:52,305 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:56:52,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-21 15:56:52,305 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:56:52,306 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:56:52,306 INFO L85 PathProgramCache]: Analyzing trace with hash 512415925, now seen corresponding path program 7 times [2024-06-21 15:56:52,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:56:52,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207652813] [2024-06-21 15:56:52,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:56:52,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:56:52,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:56:52,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:56:52,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:56:52,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207652813] [2024-06-21 15:56:52,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207652813] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:56:52,418 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:56:52,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:56:52,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773317844] [2024-06-21 15:56:52,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:56:52,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:56:52,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:56:52,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:56:52,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:56:52,475 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:56:52,475 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 268 transitions, 3066 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:56:52,476 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:56:52,476 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:56:52,476 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:56:52,946 INFO L124 PetriNetUnfolderBase]: 1851/3179 cut-off events. [2024-06-21 15:56:52,946 INFO L125 PetriNetUnfolderBase]: For 156795/156795 co-relation queries the response was YES. [2024-06-21 15:56:52,967 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19455 conditions, 3179 events. 1851/3179 cut-off events. For 156795/156795 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 19725 event pairs, 412 based on Foata normal form. 1/3178 useless extension candidates. Maximal degree in co-relation 19349. Up to 2838 conditions per place. [2024-06-21 15:56:52,977 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 235 selfloop transitions, 42 changer transitions 0/285 dead transitions. [2024-06-21 15:56:52,977 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 285 transitions, 3662 flow [2024-06-21 15:56:52,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:56:52,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:56:52,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 165 transitions. [2024-06-21 15:56:52,978 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5749128919860628 [2024-06-21 15:56:52,978 INFO L175 Difference]: Start difference. First operand has 235 places, 268 transitions, 3066 flow. Second operand 7 states and 165 transitions. [2024-06-21 15:56:52,978 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 285 transitions, 3662 flow [2024-06-21 15:56:53,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 285 transitions, 3538 flow, removed 17 selfloop flow, removed 2 redundant places. [2024-06-21 15:56:53,470 INFO L231 Difference]: Finished difference. Result has 240 places, 268 transitions, 3032 flow [2024-06-21 15:56:53,471 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2942, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3032, PETRI_PLACES=240, PETRI_TRANSITIONS=268} [2024-06-21 15:56:53,471 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 198 predicate places. [2024-06-21 15:56:53,471 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 268 transitions, 3032 flow [2024-06-21 15:56:53,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:56:53,471 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:56:53,472 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:56:53,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-21 15:56:53,472 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:56:53,472 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:56:53,472 INFO L85 PathProgramCache]: Analyzing trace with hash -1969599325, now seen corresponding path program 8 times [2024-06-21 15:56:53,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:56:53,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241792868] [2024-06-21 15:56:53,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:56:53,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:56:53,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:56:53,595 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:56:53,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:56:53,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241792868] [2024-06-21 15:56:53,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241792868] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:56:53,595 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:56:53,595 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:56:53,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123346477] [2024-06-21 15:56:53,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:56:53,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:56:53,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:56:53,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:56:53,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:56:53,640 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:56:53,641 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 268 transitions, 3032 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:56:53,641 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:56:53,641 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:56:53,641 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:56:54,069 INFO L124 PetriNetUnfolderBase]: 1869/3210 cut-off events. [2024-06-21 15:56:54,069 INFO L125 PetriNetUnfolderBase]: For 163834/163834 co-relation queries the response was YES. [2024-06-21 15:56:54,093 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19719 conditions, 3210 events. 1869/3210 cut-off events. For 163834/163834 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 19975 event pairs, 412 based on Foata normal form. 1/3209 useless extension candidates. Maximal degree in co-relation 19611. Up to 2849 conditions per place. [2024-06-21 15:56:54,103 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 229 selfloop transitions, 57 changer transitions 0/294 dead transitions. [2024-06-21 15:56:54,104 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 294 transitions, 3917 flow [2024-06-21 15:56:54,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:56:54,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:56:54,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 164 transitions. [2024-06-21 15:56:54,104 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-21 15:56:54,105 INFO L175 Difference]: Start difference. First operand has 240 places, 268 transitions, 3032 flow. Second operand 7 states and 164 transitions. [2024-06-21 15:56:54,105 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 294 transitions, 3917 flow [2024-06-21 15:56:54,594 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 294 transitions, 3819 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-21 15:56:54,597 INFO L231 Difference]: Finished difference. Result has 242 places, 279 transitions, 3243 flow [2024-06-21 15:56:54,597 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2942, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3243, PETRI_PLACES=242, PETRI_TRANSITIONS=279} [2024-06-21 15:56:54,598 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 200 predicate places. [2024-06-21 15:56:54,598 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 279 transitions, 3243 flow [2024-06-21 15:56:54,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:56:54,598 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:56:54,598 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:56:54,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-21 15:56:54,598 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:56:54,598 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:56:54,599 INFO L85 PathProgramCache]: Analyzing trace with hash -1935190141, now seen corresponding path program 5 times [2024-06-21 15:56:54,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:56:54,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015316379] [2024-06-21 15:56:54,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:56:54,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:56:54,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:56:54,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:56:54,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:56:54,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015316379] [2024-06-21 15:56:54,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015316379] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:56:54,709 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:56:54,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:56:54,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579757650] [2024-06-21 15:56:54,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:56:54,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:56:54,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:56:54,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:56:54,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:56:54,742 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:56:54,742 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 279 transitions, 3243 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:56:54,742 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:56:54,742 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:56:54,742 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:56:55,239 INFO L124 PetriNetUnfolderBase]: 1882/3232 cut-off events. [2024-06-21 15:56:55,239 INFO L125 PetriNetUnfolderBase]: For 171198/171198 co-relation queries the response was YES. [2024-06-21 15:56:55,265 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20085 conditions, 3232 events. 1882/3232 cut-off events. For 171198/171198 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 20128 event pairs, 416 based on Foata normal form. 1/3231 useless extension candidates. Maximal degree in co-relation 19975. Up to 2830 conditions per place. [2024-06-21 15:56:55,277 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 221 selfloop transitions, 72 changer transitions 0/301 dead transitions. [2024-06-21 15:56:55,278 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 301 transitions, 4209 flow [2024-06-21 15:56:55,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:56:55,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:56:55,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-21 15:56:55,279 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-21 15:56:55,279 INFO L175 Difference]: Start difference. First operand has 242 places, 279 transitions, 3243 flow. Second operand 7 states and 168 transitions. [2024-06-21 15:56:55,279 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 301 transitions, 4209 flow [2024-06-21 15:56:55,802 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 301 transitions, 4111 flow, removed 21 selfloop flow, removed 2 redundant places. [2024-06-21 15:56:55,807 INFO L231 Difference]: Finished difference. Result has 247 places, 285 transitions, 3397 flow [2024-06-21 15:56:55,807 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3145, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3397, PETRI_PLACES=247, PETRI_TRANSITIONS=285} [2024-06-21 15:56:55,808 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 205 predicate places. [2024-06-21 15:56:55,808 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 285 transitions, 3397 flow [2024-06-21 15:56:55,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:56:55,808 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:56:55,809 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:56:55,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-21 15:56:55,809 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:56:55,809 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:56:55,809 INFO L85 PathProgramCache]: Analyzing trace with hash -1282452093, now seen corresponding path program 9 times [2024-06-21 15:56:55,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:56:55,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724951516] [2024-06-21 15:56:55,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:56:55,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:56:55,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:56:55,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:56:55,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:56:55,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724951516] [2024-06-21 15:56:55,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724951516] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:56:55,933 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:56:55,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:56:55,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178076965] [2024-06-21 15:56:55,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:56:55,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:56:55,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:56:55,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:56:55,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:56:55,981 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:56:55,981 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 285 transitions, 3397 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:56:55,981 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:56:55,982 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:56:55,982 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:56:56,482 INFO L124 PetriNetUnfolderBase]: 1879/3228 cut-off events. [2024-06-21 15:56:56,482 INFO L125 PetriNetUnfolderBase]: For 174698/174698 co-relation queries the response was YES. [2024-06-21 15:56:56,507 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20113 conditions, 3228 events. 1879/3228 cut-off events. For 174698/174698 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 20115 event pairs, 412 based on Foata normal form. 1/3227 useless extension candidates. Maximal degree in co-relation 20002. Up to 2864 conditions per place. [2024-06-21 15:56:56,517 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 235 selfloop transitions, 58 changer transitions 0/301 dead transitions. [2024-06-21 15:56:56,517 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 301 transitions, 4021 flow [2024-06-21 15:56:56,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 15:56:56,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 15:56:56,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 201 transitions. [2024-06-21 15:56:56,518 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5447154471544715 [2024-06-21 15:56:56,518 INFO L175 Difference]: Start difference. First operand has 247 places, 285 transitions, 3397 flow. Second operand 9 states and 201 transitions. [2024-06-21 15:56:56,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 301 transitions, 4021 flow [2024-06-21 15:56:57,012 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 301 transitions, 3875 flow, removed 26 selfloop flow, removed 3 redundant places. [2024-06-21 15:56:57,016 INFO L231 Difference]: Finished difference. Result has 253 places, 285 transitions, 3373 flow [2024-06-21 15:56:57,016 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3251, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3373, PETRI_PLACES=253, PETRI_TRANSITIONS=285} [2024-06-21 15:56:57,017 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 211 predicate places. [2024-06-21 15:56:57,017 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 285 transitions, 3373 flow [2024-06-21 15:56:57,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:56:57,017 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:56:57,017 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:56:57,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-21 15:56:57,017 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:56:57,018 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:56:57,018 INFO L85 PathProgramCache]: Analyzing trace with hash -1935177121, now seen corresponding path program 6 times [2024-06-21 15:56:57,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:56:57,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872727166] [2024-06-21 15:56:57,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:56:57,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:56:57,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:56:57,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:56:57,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:56:57,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872727166] [2024-06-21 15:56:57,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872727166] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:56:57,128 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:56:57,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:56:57,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081467441] [2024-06-21 15:56:57,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:56:57,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:56:57,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:56:57,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:56:57,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:56:57,169 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:56:57,170 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 285 transitions, 3373 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:56:57,170 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:56:57,170 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:56:57,170 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:56:57,656 INFO L124 PetriNetUnfolderBase]: 1876/3225 cut-off events. [2024-06-21 15:56:57,657 INFO L125 PetriNetUnfolderBase]: For 177986/177986 co-relation queries the response was YES. [2024-06-21 15:56:57,676 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20055 conditions, 3225 events. 1876/3225 cut-off events. For 177986/177986 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 20089 event pairs, 400 based on Foata normal form. 1/3225 useless extension candidates. Maximal degree in co-relation 19943. Up to 2918 conditions per place. [2024-06-21 15:56:57,684 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 266 selfloop transitions, 25 changer transitions 0/299 dead transitions. [2024-06-21 15:56:57,684 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 299 transitions, 3989 flow [2024-06-21 15:56:57,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:56:57,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:56:57,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 161 transitions. [2024-06-21 15:56:57,685 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5609756097560976 [2024-06-21 15:56:57,686 INFO L175 Difference]: Start difference. First operand has 253 places, 285 transitions, 3373 flow. Second operand 7 states and 161 transitions. [2024-06-21 15:56:57,686 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 299 transitions, 3989 flow [2024-06-21 15:56:58,195 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 299 transitions, 3841 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-21 15:56:58,200 INFO L231 Difference]: Finished difference. Result has 253 places, 285 transitions, 3281 flow [2024-06-21 15:56:58,200 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3225, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=260, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3281, PETRI_PLACES=253, PETRI_TRANSITIONS=285} [2024-06-21 15:56:58,200 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 211 predicate places. [2024-06-21 15:56:58,201 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 285 transitions, 3281 flow [2024-06-21 15:56:58,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:56:58,201 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:56:58,201 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:56:58,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-21 15:56:58,201 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:56:58,202 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:56:58,202 INFO L85 PathProgramCache]: Analyzing trace with hash -1093234325, now seen corresponding path program 7 times [2024-06-21 15:56:58,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:56:58,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221084445] [2024-06-21 15:56:58,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:56:58,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:56:58,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:56:58,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:56:58,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:56:58,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221084445] [2024-06-21 15:56:58,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221084445] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:56:58,308 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:56:58,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:56:58,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3642069] [2024-06-21 15:56:58,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:56:58,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:56:58,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:56:58,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:56:58,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:56:58,345 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:56:58,345 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 285 transitions, 3281 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:56:58,345 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:56:58,345 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:56:58,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:56:58,776 INFO L124 PetriNetUnfolderBase]: 1897/3261 cut-off events. [2024-06-21 15:56:58,776 INFO L125 PetriNetUnfolderBase]: For 187967/187969 co-relation queries the response was YES. [2024-06-21 15:56:58,800 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20376 conditions, 3261 events. 1897/3261 cut-off events. For 187967/187969 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 20353 event pairs, 408 based on Foata normal form. 3/3263 useless extension candidates. Maximal degree in co-relation 20264. Up to 2847 conditions per place. [2024-06-21 15:56:58,810 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 220 selfloop transitions, 85 changer transitions 0/313 dead transitions. [2024-06-21 15:56:58,811 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 313 transitions, 4350 flow [2024-06-21 15:56:58,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:56:58,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:56:58,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-21 15:56:58,811 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-21 15:56:58,811 INFO L175 Difference]: Start difference. First operand has 253 places, 285 transitions, 3281 flow. Second operand 6 states and 150 transitions. [2024-06-21 15:56:58,812 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 313 transitions, 4350 flow [2024-06-21 15:56:59,399 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 313 transitions, 4274 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-21 15:56:59,402 INFO L231 Difference]: Finished difference. Result has 253 places, 295 transitions, 3548 flow [2024-06-21 15:56:59,402 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3205, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3548, PETRI_PLACES=253, PETRI_TRANSITIONS=295} [2024-06-21 15:56:59,403 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 211 predicate places. [2024-06-21 15:56:59,403 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 295 transitions, 3548 flow [2024-06-21 15:56:59,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:56:59,403 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:56:59,403 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:56:59,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-21 15:56:59,403 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:56:59,403 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:56:59,403 INFO L85 PathProgramCache]: Analyzing trace with hash -1087894265, now seen corresponding path program 8 times [2024-06-21 15:56:59,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:56:59,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377439580] [2024-06-21 15:56:59,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:56:59,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:56:59,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:56:59,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:56:59,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:56:59,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377439580] [2024-06-21 15:56:59,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377439580] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:56:59,515 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:56:59,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:56:59,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268200367] [2024-06-21 15:56:59,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:56:59,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:56:59,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:56:59,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:56:59,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:56:59,549 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:56:59,549 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 295 transitions, 3548 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:56:59,549 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:56:59,550 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:56:59,550 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:57:00,002 INFO L124 PetriNetUnfolderBase]: 1907/3280 cut-off events. [2024-06-21 15:57:00,003 INFO L125 PetriNetUnfolderBase]: For 193256/193256 co-relation queries the response was YES. [2024-06-21 15:57:00,027 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20718 conditions, 3280 events. 1907/3280 cut-off events. For 193256/193256 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 20511 event pairs, 404 based on Foata normal form. 1/3280 useless extension candidates. Maximal degree in co-relation 20605. Up to 2957 conditions per place. [2024-06-21 15:57:00,037 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 275 selfloop transitions, 31 changer transitions 0/314 dead transitions. [2024-06-21 15:57:00,038 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 314 transitions, 4286 flow [2024-06-21 15:57:00,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:57:00,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:57:00,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 142 transitions. [2024-06-21 15:57:00,038 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5772357723577236 [2024-06-21 15:57:00,038 INFO L175 Difference]: Start difference. First operand has 253 places, 295 transitions, 3548 flow. Second operand 6 states and 142 transitions. [2024-06-21 15:57:00,039 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 314 transitions, 4286 flow [2024-06-21 15:57:00,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 314 transitions, 4132 flow, removed 29 selfloop flow, removed 3 redundant places. [2024-06-21 15:57:00,688 INFO L231 Difference]: Finished difference. Result has 256 places, 301 transitions, 3566 flow [2024-06-21 15:57:00,689 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3402, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=267, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3566, PETRI_PLACES=256, PETRI_TRANSITIONS=301} [2024-06-21 15:57:00,689 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 214 predicate places. [2024-06-21 15:57:00,689 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 301 transitions, 3566 flow [2024-06-21 15:57:00,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:00,690 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:57:00,690 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:57:00,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-21 15:57:00,690 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:57:00,691 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:57:00,691 INFO L85 PathProgramCache]: Analyzing trace with hash 1489905931, now seen corresponding path program 9 times [2024-06-21 15:57:00,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:57:00,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761362564] [2024-06-21 15:57:00,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:57:00,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:57:00,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:57:00,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:57:00,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:57:00,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761362564] [2024-06-21 15:57:00,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761362564] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:57:00,803 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:57:00,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:57:00,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127188240] [2024-06-21 15:57:00,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:57:00,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:57:00,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:57:00,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:57:00,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:57:00,848 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:57:00,849 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 301 transitions, 3566 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:00,849 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:57:00,849 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:57:00,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:57:01,327 INFO L124 PetriNetUnfolderBase]: 1904/3272 cut-off events. [2024-06-21 15:57:01,327 INFO L125 PetriNetUnfolderBase]: For 191402/191402 co-relation queries the response was YES. [2024-06-21 15:57:01,350 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20467 conditions, 3272 events. 1904/3272 cut-off events. For 191402/191402 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 20423 event pairs, 400 based on Foata normal form. 1/3272 useless extension candidates. Maximal degree in co-relation 20354. Up to 2886 conditions per place. [2024-06-21 15:57:01,361 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 252 selfloop transitions, 68 changer transitions 0/328 dead transitions. [2024-06-21 15:57:01,361 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 328 transitions, 4402 flow [2024-06-21 15:57:01,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:57:01,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:57:01,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-06-21 15:57:01,362 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.627177700348432 [2024-06-21 15:57:01,362 INFO L175 Difference]: Start difference. First operand has 256 places, 301 transitions, 3566 flow. Second operand 7 states and 180 transitions. [2024-06-21 15:57:01,362 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 328 transitions, 4402 flow [2024-06-21 15:57:01,779 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 328 transitions, 4328 flow, removed 19 selfloop flow, removed 3 redundant places. [2024-06-21 15:57:01,782 INFO L231 Difference]: Finished difference. Result has 260 places, 301 transitions, 3658 flow [2024-06-21 15:57:01,783 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3494, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=301, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3658, PETRI_PLACES=260, PETRI_TRANSITIONS=301} [2024-06-21 15:57:01,783 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 218 predicate places. [2024-06-21 15:57:01,783 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 301 transitions, 3658 flow [2024-06-21 15:57:01,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:01,783 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:57:01,783 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:57:01,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-21 15:57:01,783 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:57:01,784 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:57:01,784 INFO L85 PathProgramCache]: Analyzing trace with hash -2106281405, now seen corresponding path program 10 times [2024-06-21 15:57:01,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:57:01,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922604690] [2024-06-21 15:57:01,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:57:01,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:57:01,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:57:01,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:57:01,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:57:01,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922604690] [2024-06-21 15:57:01,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922604690] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:57:01,890 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:57:01,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:57:01,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519477710] [2024-06-21 15:57:01,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:57:01,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:57:01,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:57:01,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:57:01,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:57:01,919 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:57:01,920 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 301 transitions, 3658 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:01,920 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:57:01,920 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:57:01,920 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:57:02,331 INFO L124 PetriNetUnfolderBase]: 1901/3263 cut-off events. [2024-06-21 15:57:02,332 INFO L125 PetriNetUnfolderBase]: For 189910/189910 co-relation queries the response was YES. [2024-06-21 15:57:02,354 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20495 conditions, 3263 events. 1901/3263 cut-off events. For 189910/189910 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 20362 event pairs, 412 based on Foata normal form. 1/3262 useless extension candidates. Maximal degree in co-relation 20382. Up to 2851 conditions per place. [2024-06-21 15:57:02,365 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 220 selfloop transitions, 90 changer transitions 0/318 dead transitions. [2024-06-21 15:57:02,365 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 318 transitions, 4448 flow [2024-06-21 15:57:02,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:57:02,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:57:02,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-21 15:57:02,366 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-21 15:57:02,366 INFO L175 Difference]: Start difference. First operand has 260 places, 301 transitions, 3658 flow. Second operand 6 states and 150 transitions. [2024-06-21 15:57:02,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 318 transitions, 4448 flow [2024-06-21 15:57:02,854 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 318 transitions, 4258 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-21 15:57:02,858 INFO L231 Difference]: Finished difference. Result has 261 places, 301 transitions, 3666 flow [2024-06-21 15:57:02,859 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3472, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=301, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3666, PETRI_PLACES=261, PETRI_TRANSITIONS=301} [2024-06-21 15:57:02,859 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 219 predicate places. [2024-06-21 15:57:02,859 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 301 transitions, 3666 flow [2024-06-21 15:57:02,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:02,859 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:57:02,859 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:57:02,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-21 15:57:02,859 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:57:02,860 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:57:02,860 INFO L85 PathProgramCache]: Analyzing trace with hash -1093471475, now seen corresponding path program 11 times [2024-06-21 15:57:02,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:57:02,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66399765] [2024-06-21 15:57:02,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:57:02,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:57:02,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:57:02,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:57:02,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:57:02,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66399765] [2024-06-21 15:57:02,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66399765] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:57:02,950 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:57:02,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:57:02,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066121550] [2024-06-21 15:57:02,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:57:02,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:57:02,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:57:02,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:57:02,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:57:02,987 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:57:02,987 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 301 transitions, 3666 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:02,987 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:57:02,987 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:57:02,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:57:03,417 INFO L124 PetriNetUnfolderBase]: 1898/3269 cut-off events. [2024-06-21 15:57:03,417 INFO L125 PetriNetUnfolderBase]: For 182207/182209 co-relation queries the response was YES. [2024-06-21 15:57:03,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20335 conditions, 3269 events. 1898/3269 cut-off events. For 182207/182209 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 20464 event pairs, 413 based on Foata normal form. 3/3271 useless extension candidates. Maximal degree in co-relation 20222. Up to 2848 conditions per place. [2024-06-21 15:57:03,450 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 223 selfloop transitions, 90 changer transitions 0/321 dead transitions. [2024-06-21 15:57:03,451 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 321 transitions, 4468 flow [2024-06-21 15:57:03,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:57:03,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:57:03,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-06-21 15:57:03,452 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6219512195121951 [2024-06-21 15:57:03,452 INFO L175 Difference]: Start difference. First operand has 261 places, 301 transitions, 3666 flow. Second operand 6 states and 153 transitions. [2024-06-21 15:57:03,452 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 321 transitions, 4468 flow [2024-06-21 15:57:03,972 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 321 transitions, 4264 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-21 15:57:03,975 INFO L231 Difference]: Finished difference. Result has 261 places, 301 transitions, 3660 flow [2024-06-21 15:57:03,976 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3466, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=301, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3660, PETRI_PLACES=261, PETRI_TRANSITIONS=301} [2024-06-21 15:57:03,976 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 219 predicate places. [2024-06-21 15:57:03,976 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 301 transitions, 3660 flow [2024-06-21 15:57:03,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:03,976 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:57:03,976 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:57:03,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-21 15:57:03,976 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:57:03,977 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:57:03,977 INFO L85 PathProgramCache]: Analyzing trace with hash -1118575215, now seen corresponding path program 12 times [2024-06-21 15:57:03,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:57:03,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965697666] [2024-06-21 15:57:03,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:57:03,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:57:03,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:57:04,101 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:57:04,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:57:04,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965697666] [2024-06-21 15:57:04,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965697666] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:57:04,101 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:57:04,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:57:04,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323244630] [2024-06-21 15:57:04,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:57:04,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:57:04,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:57:04,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:57:04,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:57:04,144 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:57:04,144 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 301 transitions, 3660 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:04,144 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:57:04,144 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:57:04,144 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:57:04,585 INFO L124 PetriNetUnfolderBase]: 1895/3261 cut-off events. [2024-06-21 15:57:04,586 INFO L125 PetriNetUnfolderBase]: For 175321/175323 co-relation queries the response was YES. [2024-06-21 15:57:04,611 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20150 conditions, 3261 events. 1895/3261 cut-off events. For 175321/175323 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 20403 event pairs, 409 based on Foata normal form. 3/3263 useless extension candidates. Maximal degree in co-relation 20038. Up to 2875 conditions per place. [2024-06-21 15:57:04,622 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 246 selfloop transitions, 65 changer transitions 0/319 dead transitions. [2024-06-21 15:57:04,622 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 319 transitions, 4328 flow [2024-06-21 15:57:04,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 15:57:04,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 15:57:04,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 133 transitions. [2024-06-21 15:57:04,623 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6487804878048781 [2024-06-21 15:57:04,623 INFO L175 Difference]: Start difference. First operand has 261 places, 301 transitions, 3660 flow. Second operand 5 states and 133 transitions. [2024-06-21 15:57:04,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 319 transitions, 4328 flow [2024-06-21 15:57:05,162 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 319 transitions, 4128 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-21 15:57:05,166 INFO L231 Difference]: Finished difference. Result has 260 places, 301 transitions, 3610 flow [2024-06-21 15:57:05,166 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3460, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=301, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3610, PETRI_PLACES=260, PETRI_TRANSITIONS=301} [2024-06-21 15:57:05,166 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 218 predicate places. [2024-06-21 15:57:05,166 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 301 transitions, 3610 flow [2024-06-21 15:57:05,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:05,167 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:57:05,167 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:57:05,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-21 15:57:05,167 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:57:05,167 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:57:05,167 INFO L85 PathProgramCache]: Analyzing trace with hash -1093471661, now seen corresponding path program 10 times [2024-06-21 15:57:05,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:57:05,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247317960] [2024-06-21 15:57:05,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:57:05,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:57:05,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:57:05,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:57:05,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:57:05,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247317960] [2024-06-21 15:57:05,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247317960] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:57:05,268 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:57:05,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:57:05,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579298341] [2024-06-21 15:57:05,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:57:05,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:57:05,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:57:05,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:57:05,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:57:05,298 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:57:05,298 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 301 transitions, 3610 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:05,298 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:57:05,298 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:57:05,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:57:05,813 INFO L124 PetriNetUnfolderBase]: 1892/3257 cut-off events. [2024-06-21 15:57:05,814 INFO L125 PetriNetUnfolderBase]: For 168225/168227 co-relation queries the response was YES. [2024-06-21 15:57:05,836 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19933 conditions, 3257 events. 1892/3257 cut-off events. For 168225/168227 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 20368 event pairs, 405 based on Foata normal form. 3/3259 useless extension candidates. Maximal degree in co-relation 19822. Up to 2830 conditions per place. [2024-06-21 15:57:05,845 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 240 selfloop transitions, 84 changer transitions 0/332 dead transitions. [2024-06-21 15:57:05,845 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 332 transitions, 4458 flow [2024-06-21 15:57:05,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:57:05,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:57:05,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 200 transitions. [2024-06-21 15:57:05,846 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-21 15:57:05,846 INFO L175 Difference]: Start difference. First operand has 260 places, 301 transitions, 3610 flow. Second operand 8 states and 200 transitions. [2024-06-21 15:57:05,846 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 332 transitions, 4458 flow [2024-06-21 15:57:06,383 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 332 transitions, 4290 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-21 15:57:06,387 INFO L231 Difference]: Finished difference. Result has 263 places, 301 transitions, 3630 flow [2024-06-21 15:57:06,388 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3444, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=301, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3630, PETRI_PLACES=263, PETRI_TRANSITIONS=301} [2024-06-21 15:57:06,388 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 221 predicate places. [2024-06-21 15:57:06,389 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 301 transitions, 3630 flow [2024-06-21 15:57:06,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:06,389 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:57:06,389 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:57:06,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-21 15:57:06,389 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:57:06,390 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:57:06,390 INFO L85 PathProgramCache]: Analyzing trace with hash 1483204165, now seen corresponding path program 11 times [2024-06-21 15:57:06,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:57:06,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316134659] [2024-06-21 15:57:06,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:57:06,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:57:06,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:57:06,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:57:06,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:57:06,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316134659] [2024-06-21 15:57:06,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316134659] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:57:06,486 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:57:06,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:57:06,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739046507] [2024-06-21 15:57:06,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:57:06,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:57:06,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:57:06,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:57:06,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:57:06,542 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:57:06,542 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 301 transitions, 3630 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:06,542 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:57:06,543 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:57:06,543 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:57:07,012 INFO L124 PetriNetUnfolderBase]: 1889/3247 cut-off events. [2024-06-21 15:57:07,013 INFO L125 PetriNetUnfolderBase]: For 166300/166300 co-relation queries the response was YES. [2024-06-21 15:57:07,041 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19886 conditions, 3247 events. 1889/3247 cut-off events. For 166300/166300 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 20291 event pairs, 408 based on Foata normal form. 1/3246 useless extension candidates. Maximal degree in co-relation 19775. Up to 2827 conditions per place. [2024-06-21 15:57:07,052 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 237 selfloop transitions, 84 changer transitions 0/329 dead transitions. [2024-06-21 15:57:07,052 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 329 transitions, 4464 flow [2024-06-21 15:57:07,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:57:07,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:57:07,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-06-21 15:57:07,053 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6036585365853658 [2024-06-21 15:57:07,053 INFO L175 Difference]: Start difference. First operand has 263 places, 301 transitions, 3630 flow. Second operand 8 states and 198 transitions. [2024-06-21 15:57:07,053 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 329 transitions, 4464 flow [2024-06-21 15:57:07,624 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 329 transitions, 4250 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-21 15:57:07,628 INFO L231 Difference]: Finished difference. Result has 264 places, 301 transitions, 3608 flow [2024-06-21 15:57:07,628 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3422, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=301, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3608, PETRI_PLACES=264, PETRI_TRANSITIONS=301} [2024-06-21 15:57:07,628 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 222 predicate places. [2024-06-21 15:57:07,628 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 301 transitions, 3608 flow [2024-06-21 15:57:07,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:07,629 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:57:07,629 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:57:07,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-21 15:57:07,629 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:57:07,629 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:57:07,629 INFO L85 PathProgramCache]: Analyzing trace with hash 912006947, now seen corresponding path program 12 times [2024-06-21 15:57:07,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:57:07,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785632197] [2024-06-21 15:57:07,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:57:07,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:57:07,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:57:07,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:57:07,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:57:07,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785632197] [2024-06-21 15:57:07,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785632197] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:57:07,744 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:57:07,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:57:07,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141509664] [2024-06-21 15:57:07,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:57:07,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:57:07,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:57:07,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:57:07,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:57:07,793 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:57:07,793 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 301 transitions, 3608 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:07,793 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:57:07,793 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:57:07,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:57:08,252 INFO L124 PetriNetUnfolderBase]: 1886/3243 cut-off events. [2024-06-21 15:57:08,252 INFO L125 PetriNetUnfolderBase]: For 154571/154571 co-relation queries the response was YES. [2024-06-21 15:57:08,275 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19628 conditions, 3243 events. 1886/3243 cut-off events. For 154571/154571 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 20278 event pairs, 408 based on Foata normal form. 1/3242 useless extension candidates. Maximal degree in co-relation 19517. Up to 2824 conditions per place. [2024-06-21 15:57:08,285 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 231 selfloop transitions, 81 changer transitions 0/320 dead transitions. [2024-06-21 15:57:08,285 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 320 transitions, 4280 flow [2024-06-21 15:57:08,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:57:08,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:57:08,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 151 transitions. [2024-06-21 15:57:08,286 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6138211382113821 [2024-06-21 15:57:08,286 INFO L175 Difference]: Start difference. First operand has 264 places, 301 transitions, 3608 flow. Second operand 6 states and 151 transitions. [2024-06-21 15:57:08,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 320 transitions, 4280 flow [2024-06-21 15:57:08,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 320 transitions, 4042 flow, removed 13 selfloop flow, removed 11 redundant places. [2024-06-21 15:57:08,800 INFO L231 Difference]: Finished difference. Result has 259 places, 301 transitions, 3546 flow [2024-06-21 15:57:08,801 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3370, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=301, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3546, PETRI_PLACES=259, PETRI_TRANSITIONS=301} [2024-06-21 15:57:08,801 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 217 predicate places. [2024-06-21 15:57:08,801 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 301 transitions, 3546 flow [2024-06-21 15:57:08,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:08,801 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:57:08,801 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:57:08,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-21 15:57:08,802 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:57:08,802 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:57:08,802 INFO L85 PathProgramCache]: Analyzing trace with hash -590777185, now seen corresponding path program 2 times [2024-06-21 15:57:08,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:57:08,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966916657] [2024-06-21 15:57:08,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:57:08,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:57:08,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:57:08,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:57:08,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:57:08,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966916657] [2024-06-21 15:57:08,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966916657] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:57:08,905 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:57:08,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:57:08,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839643873] [2024-06-21 15:57:08,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:57:08,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:57:08,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:57:08,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:57:08,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:57:08,940 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-21 15:57:08,940 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 301 transitions, 3546 flow. Second operand has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:08,940 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:57:08,941 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-21 15:57:08,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:57:09,374 INFO L124 PetriNetUnfolderBase]: 1819/3167 cut-off events. [2024-06-21 15:57:09,375 INFO L125 PetriNetUnfolderBase]: For 158901/158901 co-relation queries the response was YES. [2024-06-21 15:57:09,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19092 conditions, 3167 events. 1819/3167 cut-off events. For 158901/158901 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 19938 event pairs, 386 based on Foata normal form. 10/3145 useless extension candidates. Maximal degree in co-relation 18983. Up to 2614 conditions per place. [2024-06-21 15:57:09,409 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 230 selfloop transitions, 38 changer transitions 0/322 dead transitions. [2024-06-21 15:57:09,410 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 322 transitions, 4166 flow [2024-06-21 15:57:09,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:57:09,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:57:09,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 152 transitions. [2024-06-21 15:57:09,411 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6178861788617886 [2024-06-21 15:57:09,411 INFO L175 Difference]: Start difference. First operand has 259 places, 301 transitions, 3546 flow. Second operand 6 states and 152 transitions. [2024-06-21 15:57:09,411 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 322 transitions, 4166 flow [2024-06-21 15:57:09,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 322 transitions, 3996 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-21 15:57:09,772 INFO L231 Difference]: Finished difference. Result has 259 places, 302 transitions, 3478 flow [2024-06-21 15:57:09,772 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3376, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=301, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3478, PETRI_PLACES=259, PETRI_TRANSITIONS=302} [2024-06-21 15:57:09,772 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 217 predicate places. [2024-06-21 15:57:09,773 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 302 transitions, 3478 flow [2024-06-21 15:57:09,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:09,773 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:57:09,773 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:57:09,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-21 15:57:09,773 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:57:09,773 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:57:09,773 INFO L85 PathProgramCache]: Analyzing trace with hash -162680515, now seen corresponding path program 3 times [2024-06-21 15:57:09,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:57:09,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28094005] [2024-06-21 15:57:09,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:57:09,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:57:09,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:57:09,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:57:09,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:57:09,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28094005] [2024-06-21 15:57:09,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28094005] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:57:09,902 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:57:09,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:57:09,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047990508] [2024-06-21 15:57:09,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:57:09,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:57:09,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:57:09,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:57:09,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:57:09,941 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-21 15:57:09,941 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 302 transitions, 3478 flow. Second operand has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:09,941 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:57:09,941 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-21 15:57:09,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:57:10,410 INFO L124 PetriNetUnfolderBase]: 1848/3217 cut-off events. [2024-06-21 15:57:10,410 INFO L125 PetriNetUnfolderBase]: For 154392/154392 co-relation queries the response was YES. [2024-06-21 15:57:10,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19259 conditions, 3217 events. 1848/3217 cut-off events. For 154392/154392 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 20394 event pairs, 316 based on Foata normal form. 9/3192 useless extension candidates. Maximal degree in co-relation 19150. Up to 2670 conditions per place. [2024-06-21 15:57:10,444 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 241 selfloop transitions, 30 changer transitions 0/325 dead transitions. [2024-06-21 15:57:10,445 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 325 transitions, 4112 flow [2024-06-21 15:57:10,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 15:57:10,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 15:57:10,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 137 transitions. [2024-06-21 15:57:10,445 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6682926829268293 [2024-06-21 15:57:10,446 INFO L175 Difference]: Start difference. First operand has 259 places, 302 transitions, 3478 flow. Second operand 5 states and 137 transitions. [2024-06-21 15:57:10,446 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 325 transitions, 4112 flow [2024-06-21 15:57:10,969 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 325 transitions, 4034 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-21 15:57:10,972 INFO L231 Difference]: Finished difference. Result has 260 places, 303 transitions, 3490 flow [2024-06-21 15:57:10,973 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3402, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=302, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3490, PETRI_PLACES=260, PETRI_TRANSITIONS=303} [2024-06-21 15:57:10,973 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 218 predicate places. [2024-06-21 15:57:10,973 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 303 transitions, 3490 flow [2024-06-21 15:57:10,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:10,973 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:57:10,974 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:57:10,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-21 15:57:10,974 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:57:10,974 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:57:10,974 INFO L85 PathProgramCache]: Analyzing trace with hash -147443395, now seen corresponding path program 4 times [2024-06-21 15:57:10,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:57:10,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905063984] [2024-06-21 15:57:10,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:57:10,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:57:10,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:57:11,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:57:11,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:57:11,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905063984] [2024-06-21 15:57:11,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905063984] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:57:11,083 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:57:11,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:57:11,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823028894] [2024-06-21 15:57:11,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:57:11,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:57:11,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:57:11,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:57:11,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:57:11,135 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-21 15:57:11,136 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 303 transitions, 3490 flow. Second operand has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:11,136 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:57:11,136 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-21 15:57:11,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:57:11,659 INFO L124 PetriNetUnfolderBase]: 1850/3229 cut-off events. [2024-06-21 15:57:11,659 INFO L125 PetriNetUnfolderBase]: For 144971/144971 co-relation queries the response was YES. [2024-06-21 15:57:11,685 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19036 conditions, 3229 events. 1850/3229 cut-off events. For 144971/144971 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 20490 event pairs, 310 based on Foata normal form. 8/3206 useless extension candidates. Maximal degree in co-relation 18926. Up to 2648 conditions per place. [2024-06-21 15:57:11,696 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 243 selfloop transitions, 33 changer transitions 0/330 dead transitions. [2024-06-21 15:57:11,697 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 330 transitions, 4154 flow [2024-06-21 15:57:11,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:57:11,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:57:11,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 159 transitions. [2024-06-21 15:57:11,697 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6463414634146342 [2024-06-21 15:57:11,698 INFO L175 Difference]: Start difference. First operand has 260 places, 303 transitions, 3490 flow. Second operand 6 states and 159 transitions. [2024-06-21 15:57:11,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 330 transitions, 4154 flow [2024-06-21 15:57:12,121 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 330 transitions, 4100 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-21 15:57:12,125 INFO L231 Difference]: Finished difference. Result has 263 places, 304 transitions, 3524 flow [2024-06-21 15:57:12,125 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3436, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3524, PETRI_PLACES=263, PETRI_TRANSITIONS=304} [2024-06-21 15:57:12,125 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 221 predicate places. [2024-06-21 15:57:12,125 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 304 transitions, 3524 flow [2024-06-21 15:57:12,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:12,126 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:57:12,126 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:57:12,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-21 15:57:12,126 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:57:12,126 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:57:12,126 INFO L85 PathProgramCache]: Analyzing trace with hash -2087737535, now seen corresponding path program 1 times [2024-06-21 15:57:12,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:57:12,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360468016] [2024-06-21 15:57:12,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:57:12,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:57:12,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:57:12,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:57:12,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:57:12,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360468016] [2024-06-21 15:57:12,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360468016] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:57:12,233 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:57:12,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:57:12,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3326126] [2024-06-21 15:57:12,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:57:12,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:57:12,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:57:12,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:57:12,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:57:12,297 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-21 15:57:12,298 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 304 transitions, 3524 flow. Second operand has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:12,298 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:57:12,298 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-21 15:57:12,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:57:12,752 INFO L124 PetriNetUnfolderBase]: 1962/3426 cut-off events. [2024-06-21 15:57:12,752 INFO L125 PetriNetUnfolderBase]: For 162281/162281 co-relation queries the response was YES. [2024-06-21 15:57:12,775 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20384 conditions, 3426 events. 1962/3426 cut-off events. For 162281/162281 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 21978 event pairs, 386 based on Foata normal form. 8/3430 useless extension candidates. Maximal degree in co-relation 20273. Up to 2837 conditions per place. [2024-06-21 15:57:12,786 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 245 selfloop transitions, 44 changer transitions 0/334 dead transitions. [2024-06-21 15:57:12,786 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 334 transitions, 4342 flow [2024-06-21 15:57:12,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:57:12,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:57:12,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-21 15:57:12,787 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6167247386759582 [2024-06-21 15:57:12,787 INFO L175 Difference]: Start difference. First operand has 263 places, 304 transitions, 3524 flow. Second operand 7 states and 177 transitions. [2024-06-21 15:57:12,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 334 transitions, 4342 flow [2024-06-21 15:57:13,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 334 transitions, 4268 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-21 15:57:13,148 INFO L231 Difference]: Finished difference. Result has 266 places, 306 transitions, 3572 flow [2024-06-21 15:57:13,148 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3450, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=304, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3572, PETRI_PLACES=266, PETRI_TRANSITIONS=306} [2024-06-21 15:57:13,149 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 224 predicate places. [2024-06-21 15:57:13,149 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 306 transitions, 3572 flow [2024-06-21 15:57:13,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:13,149 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:57:13,149 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:57:13,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-21 15:57:13,150 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:57:13,150 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:57:13,150 INFO L85 PathProgramCache]: Analyzing trace with hash -2084880575, now seen corresponding path program 2 times [2024-06-21 15:57:13,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:57:13,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223287372] [2024-06-21 15:57:13,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:57:13,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:57:13,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:57:13,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:57:13,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:57:13,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223287372] [2024-06-21 15:57:13,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223287372] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:57:13,268 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:57:13,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:57:13,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974842027] [2024-06-21 15:57:13,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:57:13,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:57:13,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:57:13,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:57:13,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:57:13,313 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-21 15:57:13,313 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 306 transitions, 3572 flow. Second operand has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:13,313 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:57:13,313 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-21 15:57:13,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:57:13,853 INFO L124 PetriNetUnfolderBase]: 1996/3480 cut-off events. [2024-06-21 15:57:13,853 INFO L125 PetriNetUnfolderBase]: For 171379/171379 co-relation queries the response was YES. [2024-06-21 15:57:13,879 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20755 conditions, 3480 events. 1996/3480 cut-off events. For 171379/171379 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 22357 event pairs, 416 based on Foata normal form. 10/3486 useless extension candidates. Maximal degree in co-relation 20643. Up to 2964 conditions per place. [2024-06-21 15:57:13,890 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 241 selfloop transitions, 42 changer transitions 0/328 dead transitions. [2024-06-21 15:57:13,891 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 328 transitions, 4226 flow [2024-06-21 15:57:13,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:57:13,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:57:13,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-21 15:57:13,891 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5958188153310104 [2024-06-21 15:57:13,892 INFO L175 Difference]: Start difference. First operand has 266 places, 306 transitions, 3572 flow. Second operand 7 states and 171 transitions. [2024-06-21 15:57:13,892 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 328 transitions, 4226 flow [2024-06-21 15:57:14,405 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 328 transitions, 4171 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-21 15:57:14,408 INFO L231 Difference]: Finished difference. Result has 270 places, 307 transitions, 3625 flow [2024-06-21 15:57:14,409 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3517, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=306, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3625, PETRI_PLACES=270, PETRI_TRANSITIONS=307} [2024-06-21 15:57:14,409 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 228 predicate places. [2024-06-21 15:57:14,409 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 307 transitions, 3625 flow [2024-06-21 15:57:14,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:14,409 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:57:14,409 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:57:14,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-21 15:57:14,409 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:57:14,410 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:57:14,410 INFO L85 PathProgramCache]: Analyzing trace with hash -1934913497, now seen corresponding path program 3 times [2024-06-21 15:57:14,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:57:14,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444305241] [2024-06-21 15:57:14,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:57:14,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:57:14,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:57:14,528 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:57:14,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:57:14,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444305241] [2024-06-21 15:57:14,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444305241] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:57:14,528 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:57:14,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:57:14,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328805538] [2024-06-21 15:57:14,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:57:14,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:57:14,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:57:14,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:57:14,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:57:14,566 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-21 15:57:14,566 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 307 transitions, 3625 flow. Second operand has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:14,566 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:57:14,567 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-21 15:57:14,567 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:57:15,071 INFO L124 PetriNetUnfolderBase]: 2023/3527 cut-off events. [2024-06-21 15:57:15,071 INFO L125 PetriNetUnfolderBase]: For 177361/177361 co-relation queries the response was YES. [2024-06-21 15:57:15,099 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21224 conditions, 3527 events. 2023/3527 cut-off events. For 177361/177361 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 22757 event pairs, 420 based on Foata normal form. 10/3531 useless extension candidates. Maximal degree in co-relation 21110. Up to 3027 conditions per place. [2024-06-21 15:57:15,111 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 251 selfloop transitions, 30 changer transitions 0/326 dead transitions. [2024-06-21 15:57:15,112 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 326 transitions, 4269 flow [2024-06-21 15:57:15,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:57:15,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:57:15,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-21 15:57:15,112 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5818815331010453 [2024-06-21 15:57:15,112 INFO L175 Difference]: Start difference. First operand has 270 places, 307 transitions, 3625 flow. Second operand 7 states and 167 transitions. [2024-06-21 15:57:15,113 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 326 transitions, 4269 flow [2024-06-21 15:57:15,518 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 326 transitions, 4185 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-21 15:57:15,521 INFO L231 Difference]: Finished difference. Result has 272 places, 308 transitions, 3627 flow [2024-06-21 15:57:15,522 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3541, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=307, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3627, PETRI_PLACES=272, PETRI_TRANSITIONS=308} [2024-06-21 15:57:15,522 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 230 predicate places. [2024-06-21 15:57:15,522 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 308 transitions, 3627 flow [2024-06-21 15:57:15,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:15,522 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:57:15,522 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:57:15,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-21 15:57:15,522 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:57:15,523 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:57:15,523 INFO L85 PathProgramCache]: Analyzing trace with hash -1934728799, now seen corresponding path program 1 times [2024-06-21 15:57:15,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:57:15,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613183612] [2024-06-21 15:57:15,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:57:15,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:57:15,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:57:15,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:57:15,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:57:15,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613183612] [2024-06-21 15:57:15,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613183612] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:57:15,634 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:57:15,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:57:15,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928292287] [2024-06-21 15:57:15,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:57:15,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:57:15,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:57:15,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:57:15,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:57:15,663 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:57:15,663 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 308 transitions, 3627 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:15,663 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:57:15,663 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:57:15,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:57:16,172 INFO L124 PetriNetUnfolderBase]: 2101/3613 cut-off events. [2024-06-21 15:57:16,172 INFO L125 PetriNetUnfolderBase]: For 167959/167959 co-relation queries the response was YES. [2024-06-21 15:57:16,199 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21761 conditions, 3613 events. 2101/3613 cut-off events. For 167959/167959 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 22970 event pairs, 439 based on Foata normal form. 2/3614 useless extension candidates. Maximal degree in co-relation 21646. Up to 3266 conditions per place. [2024-06-21 15:57:16,211 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 290 selfloop transitions, 27 changer transitions 0/325 dead transitions. [2024-06-21 15:57:16,211 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 325 transitions, 4331 flow [2024-06-21 15:57:16,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:57:16,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:57:16,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 161 transitions. [2024-06-21 15:57:16,212 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5609756097560976 [2024-06-21 15:57:16,212 INFO L175 Difference]: Start difference. First operand has 272 places, 308 transitions, 3627 flow. Second operand 7 states and 161 transitions. [2024-06-21 15:57:16,212 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 325 transitions, 4331 flow [2024-06-21 15:57:16,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 325 transitions, 4269 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-21 15:57:16,737 INFO L231 Difference]: Finished difference. Result has 274 places, 310 transitions, 3662 flow [2024-06-21 15:57:16,738 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3565, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3662, PETRI_PLACES=274, PETRI_TRANSITIONS=310} [2024-06-21 15:57:16,738 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 232 predicate places. [2024-06-21 15:57:16,738 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 310 transitions, 3662 flow [2024-06-21 15:57:16,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:16,738 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:57:16,738 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:57:16,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-21 15:57:16,738 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:57:16,739 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:57:16,739 INFO L85 PathProgramCache]: Analyzing trace with hash -2106004761, now seen corresponding path program 4 times [2024-06-21 15:57:16,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:57:16,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329582776] [2024-06-21 15:57:16,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:57:16,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:57:16,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:57:16,862 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:57:16,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:57:16,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329582776] [2024-06-21 15:57:16,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329582776] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:57:16,862 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:57:16,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:57:16,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979706183] [2024-06-21 15:57:16,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:57:16,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:57:16,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:57:16,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:57:16,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:57:16,902 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-21 15:57:16,902 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 310 transitions, 3662 flow. Second operand has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:16,902 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:57:16,902 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-21 15:57:16,902 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:57:17,397 INFO L124 PetriNetUnfolderBase]: 2009/3507 cut-off events. [2024-06-21 15:57:17,397 INFO L125 PetriNetUnfolderBase]: For 169616/169616 co-relation queries the response was YES. [2024-06-21 15:57:17,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20669 conditions, 3507 events. 2009/3507 cut-off events. For 169616/169616 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 22633 event pairs, 383 based on Foata normal form. 10/3511 useless extension candidates. Maximal degree in co-relation 20553. Up to 2936 conditions per place. [2024-06-21 15:57:17,435 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 248 selfloop transitions, 40 changer transitions 0/333 dead transitions. [2024-06-21 15:57:17,435 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 333 transitions, 4316 flow [2024-06-21 15:57:17,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:57:17,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:57:17,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 155 transitions. [2024-06-21 15:57:17,436 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6300813008130082 [2024-06-21 15:57:17,436 INFO L175 Difference]: Start difference. First operand has 274 places, 310 transitions, 3662 flow. Second operand 6 states and 155 transitions. [2024-06-21 15:57:17,436 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 333 transitions, 4316 flow [2024-06-21 15:57:17,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 333 transitions, 4233 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-21 15:57:17,963 INFO L231 Difference]: Finished difference. Result has 275 places, 310 transitions, 3672 flow [2024-06-21 15:57:17,963 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3579, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=310, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3672, PETRI_PLACES=275, PETRI_TRANSITIONS=310} [2024-06-21 15:57:17,963 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 233 predicate places. [2024-06-21 15:57:17,963 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 310 transitions, 3672 flow [2024-06-21 15:57:17,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:17,963 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:57:17,964 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:57:17,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-21 15:57:17,964 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:57:17,964 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:57:17,964 INFO L85 PathProgramCache]: Analyzing trace with hash -156007331, now seen corresponding path program 2 times [2024-06-21 15:57:17,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:57:17,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515985509] [2024-06-21 15:57:17,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:57:17,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:57:17,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:57:18,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:57:18,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:57:18,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515985509] [2024-06-21 15:57:18,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515985509] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:57:18,083 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:57:18,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:57:18,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708338168] [2024-06-21 15:57:18,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:57:18,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:57:18,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:57:18,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:57:18,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:57:18,140 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:57:18,141 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 310 transitions, 3672 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:18,141 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:57:18,141 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:57:18,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:57:18,668 INFO L124 PetriNetUnfolderBase]: 2086/3592 cut-off events. [2024-06-21 15:57:18,668 INFO L125 PetriNetUnfolderBase]: For 159408/159408 co-relation queries the response was YES. [2024-06-21 15:57:18,694 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21252 conditions, 3592 events. 2086/3592 cut-off events. For 159408/159408 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 22820 event pairs, 432 based on Foata normal form. 2/3593 useless extension candidates. Maximal degree in co-relation 21135. Up to 3237 conditions per place. [2024-06-21 15:57:18,705 INFO L140 encePairwiseOnDemand]: 35/41 looper letters, 290 selfloop transitions, 27 changer transitions 0/325 dead transitions. [2024-06-21 15:57:18,706 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 325 transitions, 4376 flow [2024-06-21 15:57:18,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 15:57:18,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 15:57:18,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 123 transitions. [2024-06-21 15:57:18,706 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-21 15:57:18,707 INFO L175 Difference]: Start difference. First operand has 275 places, 310 transitions, 3672 flow. Second operand 5 states and 123 transitions. [2024-06-21 15:57:18,707 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 325 transitions, 4376 flow [2024-06-21 15:57:19,326 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 325 transitions, 4288 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-21 15:57:19,330 INFO L231 Difference]: Finished difference. Result has 275 places, 312 transitions, 3689 flow [2024-06-21 15:57:19,331 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3584, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=310, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=283, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3689, PETRI_PLACES=275, PETRI_TRANSITIONS=312} [2024-06-21 15:57:19,331 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 233 predicate places. [2024-06-21 15:57:19,331 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 312 transitions, 3689 flow [2024-06-21 15:57:19,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:19,331 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:57:19,331 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:57:19,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-21 15:57:19,332 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:57:19,332 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:57:19,332 INFO L85 PathProgramCache]: Analyzing trace with hash -147436451, now seen corresponding path program 3 times [2024-06-21 15:57:19,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:57:19,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092913375] [2024-06-21 15:57:19,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:57:19,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:57:19,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:57:19,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:57:19,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:57:19,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092913375] [2024-06-21 15:57:19,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092913375] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:57:19,443 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:57:19,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:57:19,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646823951] [2024-06-21 15:57:19,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:57:19,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:57:19,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:57:19,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:57:19,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:57:19,473 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:57:19,474 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 312 transitions, 3689 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:19,474 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:57:19,474 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:57:19,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:57:19,953 INFO L124 PetriNetUnfolderBase]: 2081/3588 cut-off events. [2024-06-21 15:57:19,953 INFO L125 PetriNetUnfolderBase]: For 155709/155711 co-relation queries the response was YES. [2024-06-21 15:57:19,980 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21063 conditions, 3588 events. 2081/3588 cut-off events. For 155709/155711 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 22825 event pairs, 423 based on Foata normal form. 4/3591 useless extension candidates. Maximal degree in co-relation 20945. Up to 3216 conditions per place. [2024-06-21 15:57:19,991 INFO L140 encePairwiseOnDemand]: 35/41 looper letters, 289 selfloop transitions, 28 changer transitions 0/325 dead transitions. [2024-06-21 15:57:19,991 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 325 transitions, 4391 flow [2024-06-21 15:57:19,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 15:57:19,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 15:57:19,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 120 transitions. [2024-06-21 15:57:19,992 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-21 15:57:19,992 INFO L175 Difference]: Start difference. First operand has 275 places, 312 transitions, 3689 flow. Second operand 5 states and 120 transitions. [2024-06-21 15:57:19,992 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 325 transitions, 4391 flow [2024-06-21 15:57:20,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 325 transitions, 4304 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-06-21 15:57:20,560 INFO L231 Difference]: Finished difference. Result has 277 places, 314 transitions, 3709 flow [2024-06-21 15:57:20,560 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3606, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=312, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3709, PETRI_PLACES=277, PETRI_TRANSITIONS=314} [2024-06-21 15:57:20,560 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 235 predicate places. [2024-06-21 15:57:20,561 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 314 transitions, 3709 flow [2024-06-21 15:57:20,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:20,561 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:57:20,561 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:57:20,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-21 15:57:20,561 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:57:20,562 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:57:20,562 INFO L85 PathProgramCache]: Analyzing trace with hash -602004014, now seen corresponding path program 1 times [2024-06-21 15:57:20,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:57:20,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900580284] [2024-06-21 15:57:20,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:57:20,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:57:20,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:57:20,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:57:20,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:57:20,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900580284] [2024-06-21 15:57:20,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900580284] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:57:20,657 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:57:20,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:57:20,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471869606] [2024-06-21 15:57:20,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:57:20,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:57:20,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:57:20,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:57:20,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:57:20,698 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:57:20,699 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 314 transitions, 3709 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 15:57:20,699 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:57:20,699 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:57:20,699 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:57:21,239 INFO L124 PetriNetUnfolderBase]: 2094/3609 cut-off events. [2024-06-21 15:57:21,239 INFO L125 PetriNetUnfolderBase]: For 155821/155821 co-relation queries the response was YES. [2024-06-21 15:57:21,265 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21213 conditions, 3609 events. 2094/3609 cut-off events. For 155821/155821 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 23018 event pairs, 451 based on Foata normal form. 1/3608 useless extension candidates. Maximal degree in co-relation 21094. Up to 3005 conditions per place. [2024-06-21 15:57:21,276 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 212 selfloop transitions, 129 changer transitions 0/349 dead transitions. [2024-06-21 15:57:21,276 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 349 transitions, 4835 flow [2024-06-21 15:57:21,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:57:21,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:57:21,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-06-21 15:57:21,277 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6067073170731707 [2024-06-21 15:57:21,277 INFO L175 Difference]: Start difference. First operand has 277 places, 314 transitions, 3709 flow. Second operand 8 states and 199 transitions. [2024-06-21 15:57:21,277 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 349 transitions, 4835 flow [2024-06-21 15:57:21,864 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 349 transitions, 4748 flow, removed 17 selfloop flow, removed 3 redundant places. [2024-06-21 15:57:21,868 INFO L231 Difference]: Finished difference. Result has 282 places, 323 transitions, 4024 flow [2024-06-21 15:57:21,869 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3622, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=314, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4024, PETRI_PLACES=282, PETRI_TRANSITIONS=323} [2024-06-21 15:57:21,869 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 240 predicate places. [2024-06-21 15:57:21,869 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 323 transitions, 4024 flow [2024-06-21 15:57:21,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 15:57:21,869 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:57:21,869 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:57:21,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-21 15:57:21,870 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:57:21,870 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:57:21,870 INFO L85 PathProgramCache]: Analyzing trace with hash -598279364, now seen corresponding path program 2 times [2024-06-21 15:57:21,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:57:21,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435925400] [2024-06-21 15:57:21,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:57:21,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:57:21,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:57:21,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:57:21,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:57:21,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435925400] [2024-06-21 15:57:21,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435925400] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:57:21,984 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:57:21,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:57:21,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029832823] [2024-06-21 15:57:21,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:57:21,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:57:21,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:57:21,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:57:21,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:57:22,026 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:57:22,027 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 323 transitions, 4024 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 15:57:22,027 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:57:22,027 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:57:22,027 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:57:22,547 INFO L124 PetriNetUnfolderBase]: 2107/3632 cut-off events. [2024-06-21 15:57:22,547 INFO L125 PetriNetUnfolderBase]: For 164649/164651 co-relation queries the response was YES. [2024-06-21 15:57:22,573 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21960 conditions, 3632 events. 2107/3632 cut-off events. For 164649/164651 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 23149 event pairs, 441 based on Foata normal form. 3/3634 useless extension candidates. Maximal degree in co-relation 21840. Up to 3168 conditions per place. [2024-06-21 15:57:22,584 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 247 selfloop transitions, 98 changer transitions 0/353 dead transitions. [2024-06-21 15:57:22,584 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 353 transitions, 4998 flow [2024-06-21 15:57:22,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 15:57:22,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 15:57:22,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 229 transitions. [2024-06-21 15:57:22,586 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5585365853658537 [2024-06-21 15:57:22,586 INFO L175 Difference]: Start difference. First operand has 282 places, 323 transitions, 4024 flow. Second operand 10 states and 229 transitions. [2024-06-21 15:57:22,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 353 transitions, 4998 flow [2024-06-21 15:57:23,132 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 353 transitions, 4853 flow, removed 39 selfloop flow, removed 3 redundant places. [2024-06-21 15:57:23,136 INFO L231 Difference]: Finished difference. Result has 289 places, 329 transitions, 4187 flow [2024-06-21 15:57:23,136 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3903, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=323, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4187, PETRI_PLACES=289, PETRI_TRANSITIONS=329} [2024-06-21 15:57:23,137 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 247 predicate places. [2024-06-21 15:57:23,137 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 329 transitions, 4187 flow [2024-06-21 15:57:23,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 15:57:23,137 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:57:23,137 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:57:23,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-21 15:57:23,138 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:57:23,138 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:57:23,138 INFO L85 PathProgramCache]: Analyzing trace with hash -598284944, now seen corresponding path program 3 times [2024-06-21 15:57:23,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:57:23,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337228444] [2024-06-21 15:57:23,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:57:23,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:57:23,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:57:23,254 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:57:23,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:57:23,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337228444] [2024-06-21 15:57:23,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337228444] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:57:23,255 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:57:23,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:57:23,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919604129] [2024-06-21 15:57:23,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:57:23,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:57:23,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:57:23,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:57:23,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:57:23,296 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:57:23,296 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 329 transitions, 4187 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 15:57:23,296 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:57:23,296 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:57:23,297 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:57:23,826 INFO L124 PetriNetUnfolderBase]: 2104/3628 cut-off events. [2024-06-21 15:57:23,827 INFO L125 PetriNetUnfolderBase]: For 167371/167373 co-relation queries the response was YES. [2024-06-21 15:57:23,855 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22079 conditions, 3628 events. 2104/3628 cut-off events. For 167371/167373 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 23151 event pairs, 441 based on Foata normal form. 3/3630 useless extension candidates. Maximal degree in co-relation 21957. Up to 3165 conditions per place. [2024-06-21 15:57:23,867 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 245 selfloop transitions, 97 changer transitions 0/350 dead transitions. [2024-06-21 15:57:23,867 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 350 transitions, 4923 flow [2024-06-21 15:57:23,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:57:23,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:57:23,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-06-21 15:57:23,868 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-21 15:57:23,868 INFO L175 Difference]: Start difference. First operand has 289 places, 329 transitions, 4187 flow. Second operand 8 states and 192 transitions. [2024-06-21 15:57:23,868 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 350 transitions, 4923 flow [2024-06-21 15:57:24,584 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 350 transitions, 4761 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-21 15:57:24,588 INFO L231 Difference]: Finished difference. Result has 291 places, 329 transitions, 4225 flow [2024-06-21 15:57:24,589 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4025, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=329, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4225, PETRI_PLACES=291, PETRI_TRANSITIONS=329} [2024-06-21 15:57:24,589 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 249 predicate places. [2024-06-21 15:57:24,589 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 329 transitions, 4225 flow [2024-06-21 15:57:24,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 15:57:24,589 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:57:24,589 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:57:24,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-21 15:57:24,590 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:57:24,590 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:57:24,590 INFO L85 PathProgramCache]: Analyzing trace with hash 605182110, now seen corresponding path program 4 times [2024-06-21 15:57:24,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:57:24,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831934926] [2024-06-21 15:57:24,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:57:24,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:57:24,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:57:24,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:57:24,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:57:24,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831934926] [2024-06-21 15:57:24,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831934926] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:57:24,691 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:57:24,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:57:24,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625692307] [2024-06-21 15:57:24,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:57:24,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:57:24,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:57:24,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:57:24,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:57:24,733 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:57:24,733 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 329 transitions, 4225 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 15:57:24,733 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:57:24,733 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:57:24,733 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:57:25,279 INFO L124 PetriNetUnfolderBase]: 2125/3663 cut-off events. [2024-06-21 15:57:25,279 INFO L125 PetriNetUnfolderBase]: For 176359/176361 co-relation queries the response was YES. [2024-06-21 15:57:25,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22632 conditions, 3663 events. 2125/3663 cut-off events. For 176359/176361 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 23369 event pairs, 441 based on Foata normal form. 3/3665 useless extension candidates. Maximal degree in co-relation 22508. Up to 3173 conditions per place. [2024-06-21 15:57:25,320 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 238 selfloop transitions, 113 changer transitions 0/359 dead transitions. [2024-06-21 15:57:25,320 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 359 transitions, 5241 flow [2024-06-21 15:57:25,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 15:57:25,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 15:57:25,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 226 transitions. [2024-06-21 15:57:25,321 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.551219512195122 [2024-06-21 15:57:25,321 INFO L175 Difference]: Start difference. First operand has 291 places, 329 transitions, 4225 flow. Second operand 10 states and 226 transitions. [2024-06-21 15:57:25,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 359 transitions, 5241 flow [2024-06-21 15:57:25,843 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 359 transitions, 5047 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-21 15:57:25,847 INFO L231 Difference]: Finished difference. Result has 295 places, 338 transitions, 4427 flow [2024-06-21 15:57:25,848 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4031, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=329, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4427, PETRI_PLACES=295, PETRI_TRANSITIONS=338} [2024-06-21 15:57:25,848 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 253 predicate places. [2024-06-21 15:57:25,848 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 338 transitions, 4427 flow [2024-06-21 15:57:25,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 15:57:25,848 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:57:25,848 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:57:25,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-21 15:57:25,849 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:57:25,849 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:57:25,849 INFO L85 PathProgramCache]: Analyzing trace with hash 597830460, now seen corresponding path program 5 times [2024-06-21 15:57:25,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:57:25,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737297119] [2024-06-21 15:57:25,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:57:25,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:57:25,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:57:25,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:57:25,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:57:25,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737297119] [2024-06-21 15:57:25,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737297119] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:57:25,950 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:57:25,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:57:25,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076137577] [2024-06-21 15:57:25,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:57:25,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:57:25,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:57:25,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:57:25,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:57:25,988 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:57:25,988 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 338 transitions, 4427 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 15:57:25,988 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:57:25,988 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:57:25,988 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:57:26,552 INFO L124 PetriNetUnfolderBase]: 2130/3672 cut-off events. [2024-06-21 15:57:26,553 INFO L125 PetriNetUnfolderBase]: For 181453/181455 co-relation queries the response was YES. [2024-06-21 15:57:26,583 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22862 conditions, 3672 events. 2130/3672 cut-off events. For 181453/181455 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 23491 event pairs, 441 based on Foata normal form. 3/3674 useless extension candidates. Maximal degree in co-relation 22736. Up to 3179 conditions per place. [2024-06-21 15:57:26,594 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 244 selfloop transitions, 112 changer transitions 0/364 dead transitions. [2024-06-21 15:57:26,595 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 364 transitions, 5510 flow [2024-06-21 15:57:26,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 15:57:26,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 15:57:26,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 249 transitions. [2024-06-21 15:57:26,595 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5521064301552107 [2024-06-21 15:57:26,595 INFO L175 Difference]: Start difference. First operand has 295 places, 338 transitions, 4427 flow. Second operand 11 states and 249 transitions. [2024-06-21 15:57:26,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 364 transitions, 5510 flow [2024-06-21 15:57:27,172 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 364 transitions, 5316 flow, removed 38 selfloop flow, removed 6 redundant places. [2024-06-21 15:57:27,176 INFO L231 Difference]: Finished difference. Result has 300 places, 341 transitions, 4516 flow [2024-06-21 15:57:27,176 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4243, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4516, PETRI_PLACES=300, PETRI_TRANSITIONS=341} [2024-06-21 15:57:27,176 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 258 predicate places. [2024-06-21 15:57:27,176 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 341 transitions, 4516 flow [2024-06-21 15:57:27,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 15:57:27,177 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:57:27,177 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:57:27,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-21 15:57:27,177 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:57:27,177 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:57:27,177 INFO L85 PathProgramCache]: Analyzing trace with hash 624531976, now seen corresponding path program 6 times [2024-06-21 15:57:27,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:57:27,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470575291] [2024-06-21 15:57:27,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:57:27,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:57:27,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:57:27,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:57:27,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:57:27,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470575291] [2024-06-21 15:57:27,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470575291] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:57:27,277 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:57:27,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:57:27,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681897373] [2024-06-21 15:57:27,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:57:27,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:57:27,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:57:27,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:57:27,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:57:27,313 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:57:27,314 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 341 transitions, 4516 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 15:57:27,314 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:57:27,314 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:57:27,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:57:27,876 INFO L124 PetriNetUnfolderBase]: 2127/3668 cut-off events. [2024-06-21 15:57:27,876 INFO L125 PetriNetUnfolderBase]: For 183835/183837 co-relation queries the response was YES. [2024-06-21 15:57:27,922 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22961 conditions, 3668 events. 2127/3668 cut-off events. For 183835/183837 co-relation queries the response was YES. Maximal size of possible extension queue 280. Compared 23490 event pairs, 441 based on Foata normal form. 3/3670 useless extension candidates. Maximal degree in co-relation 22833. Up to 3176 conditions per place. [2024-06-21 15:57:27,939 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 242 selfloop transitions, 111 changer transitions 0/361 dead transitions. [2024-06-21 15:57:27,939 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 361 transitions, 5404 flow [2024-06-21 15:57:27,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 15:57:27,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 15:57:27,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 210 transitions. [2024-06-21 15:57:27,940 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5691056910569106 [2024-06-21 15:57:27,940 INFO L175 Difference]: Start difference. First operand has 300 places, 341 transitions, 4516 flow. Second operand 9 states and 210 transitions. [2024-06-21 15:57:27,940 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 361 transitions, 5404 flow [2024-06-21 15:57:28,655 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 361 transitions, 5083 flow, removed 22 selfloop flow, removed 8 redundant places. [2024-06-21 15:57:28,659 INFO L231 Difference]: Finished difference. Result has 301 places, 341 transitions, 4423 flow [2024-06-21 15:57:28,659 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4195, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=341, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4423, PETRI_PLACES=301, PETRI_TRANSITIONS=341} [2024-06-21 15:57:28,659 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 259 predicate places. [2024-06-21 15:57:28,660 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 341 transitions, 4423 flow [2024-06-21 15:57:28,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 15:57:28,660 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:57:28,660 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:57:28,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-21 15:57:28,660 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:57:28,661 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:57:28,661 INFO L85 PathProgramCache]: Analyzing trace with hash 1810448022, now seen corresponding path program 7 times [2024-06-21 15:57:28,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:57:28,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244143705] [2024-06-21 15:57:28,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:57:28,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:57:28,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:57:28,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:57:28,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:57:28,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244143705] [2024-06-21 15:57:28,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244143705] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:57:28,762 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:57:28,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:57:28,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487127954] [2024-06-21 15:57:28,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:57:28,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:57:28,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:57:28,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:57:28,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:57:28,803 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:57:28,803 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 341 transitions, 4423 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 15:57:28,803 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:57:28,803 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:57:28,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:57:29,324 INFO L124 PetriNetUnfolderBase]: 2140/3684 cut-off events. [2024-06-21 15:57:29,324 INFO L125 PetriNetUnfolderBase]: For 191224/191224 co-relation queries the response was YES. [2024-06-21 15:57:29,356 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23047 conditions, 3684 events. 2140/3684 cut-off events. For 191224/191224 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 23582 event pairs, 444 based on Foata normal form. 1/3683 useless extension candidates. Maximal degree in co-relation 22919. Up to 3059 conditions per place. [2024-06-21 15:57:29,368 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 210 selfloop transitions, 153 changer transitions 0/371 dead transitions. [2024-06-21 15:57:29,368 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 371 transitions, 5719 flow [2024-06-21 15:57:29,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:57:29,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:57:29,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-21 15:57:29,369 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.600609756097561 [2024-06-21 15:57:29,369 INFO L175 Difference]: Start difference. First operand has 301 places, 341 transitions, 4423 flow. Second operand 8 states and 197 transitions. [2024-06-21 15:57:29,369 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 371 transitions, 5719 flow [2024-06-21 15:57:29,985 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 371 transitions, 5497 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-21 15:57:29,989 INFO L231 Difference]: Finished difference. Result has 301 places, 347 transitions, 4617 flow [2024-06-21 15:57:29,990 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4201, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=341, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4617, PETRI_PLACES=301, PETRI_TRANSITIONS=347} [2024-06-21 15:57:29,990 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 259 predicate places. [2024-06-21 15:57:29,990 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 347 transitions, 4617 flow [2024-06-21 15:57:29,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 15:57:29,991 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:57:29,991 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:57:29,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-21 15:57:29,991 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:57:29,991 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:57:29,991 INFO L85 PathProgramCache]: Analyzing trace with hash 51263360, now seen corresponding path program 8 times [2024-06-21 15:57:29,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:57:29,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640814747] [2024-06-21 15:57:29,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:57:29,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:57:29,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:57:30,101 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:57:30,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:57:30,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640814747] [2024-06-21 15:57:30,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640814747] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:57:30,102 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:57:30,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:57:30,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362754527] [2024-06-21 15:57:30,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:57:30,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:57:30,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:57:30,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:57:30,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:57:30,180 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:57:30,181 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 347 transitions, 4617 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 15:57:30,181 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:57:30,181 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:57:30,181 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:57:30,819 INFO L124 PetriNetUnfolderBase]: 2145/3693 cut-off events. [2024-06-21 15:57:30,820 INFO L125 PetriNetUnfolderBase]: For 196850/196850 co-relation queries the response was YES. [2024-06-21 15:57:30,846 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23294 conditions, 3693 events. 2145/3693 cut-off events. For 196850/196850 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 23641 event pairs, 444 based on Foata normal form. 1/3692 useless extension candidates. Maximal degree in co-relation 23165. Up to 3221 conditions per place. [2024-06-21 15:57:30,856 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 265 selfloop transitions, 98 changer transitions 0/371 dead transitions. [2024-06-21 15:57:30,857 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 371 transitions, 5577 flow [2024-06-21 15:57:30,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 15:57:30,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 15:57:30,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 226 transitions. [2024-06-21 15:57:30,857 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.551219512195122 [2024-06-21 15:57:30,858 INFO L175 Difference]: Start difference. First operand has 301 places, 347 transitions, 4617 flow. Second operand 10 states and 226 transitions. [2024-06-21 15:57:30,858 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 371 transitions, 5577 flow [2024-06-21 15:57:31,518 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 371 transitions, 5211 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-06-21 15:57:31,524 INFO L231 Difference]: Finished difference. Result has 306 places, 350 transitions, 4499 flow [2024-06-21 15:57:31,524 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4257, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4499, PETRI_PLACES=306, PETRI_TRANSITIONS=350} [2024-06-21 15:57:31,525 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 264 predicate places. [2024-06-21 15:57:31,525 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 350 transitions, 4499 flow [2024-06-21 15:57:31,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 15:57:31,525 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:57:31,525 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:57:31,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-21 15:57:31,526 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:57:31,526 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:57:31,526 INFO L85 PathProgramCache]: Analyzing trace with hash 484073076, now seen corresponding path program 9 times [2024-06-21 15:57:31,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:57:31,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367713255] [2024-06-21 15:57:31,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:57:31,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:57:31,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:57:31,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:57:31,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:57:31,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367713255] [2024-06-21 15:57:31,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367713255] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:57:31,646 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:57:31,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:57:31,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441069670] [2024-06-21 15:57:31,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:57:31,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:57:31,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:57:31,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:57:31,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:57:31,686 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:57:31,686 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 350 transitions, 4499 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 15:57:31,687 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:57:31,687 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:57:31,687 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:57:32,225 INFO L124 PetriNetUnfolderBase]: 2150/3702 cut-off events. [2024-06-21 15:57:32,225 INFO L125 PetriNetUnfolderBase]: For 200725/200725 co-relation queries the response was YES. [2024-06-21 15:57:32,256 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23234 conditions, 3702 events. 2150/3702 cut-off events. For 200725/200725 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 23720 event pairs, 444 based on Foata normal form. 1/3701 useless extension candidates. Maximal degree in co-relation 23104. Up to 3071 conditions per place. [2024-06-21 15:57:32,268 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 199 selfloop transitions, 169 changer transitions 0/376 dead transitions. [2024-06-21 15:57:32,268 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 376 transitions, 5615 flow [2024-06-21 15:57:32,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:57:32,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:57:32,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 195 transitions. [2024-06-21 15:57:32,269 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5945121951219512 [2024-06-21 15:57:32,269 INFO L175 Difference]: Start difference. First operand has 306 places, 350 transitions, 4499 flow. Second operand 8 states and 195 transitions. [2024-06-21 15:57:32,269 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 376 transitions, 5615 flow [2024-06-21 15:57:32,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 376 transitions, 5367 flow, removed 8 selfloop flow, removed 9 redundant places. [2024-06-21 15:57:32,947 INFO L231 Difference]: Finished difference. Result has 305 places, 353 transitions, 4639 flow [2024-06-21 15:57:32,947 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4251, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=350, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=166, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4639, PETRI_PLACES=305, PETRI_TRANSITIONS=353} [2024-06-21 15:57:32,947 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 263 predicate places. [2024-06-21 15:57:32,948 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 353 transitions, 4639 flow [2024-06-21 15:57:32,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 15:57:32,948 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:57:32,948 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:57:32,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-21 15:57:32,948 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:57:32,948 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:57:32,949 INFO L85 PathProgramCache]: Analyzing trace with hash -1294974716, now seen corresponding path program 10 times [2024-06-21 15:57:32,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:57:32,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105485824] [2024-06-21 15:57:32,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:57:32,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:57:32,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:57:33,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:57:33,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:57:33,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105485824] [2024-06-21 15:57:33,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105485824] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:57:33,062 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:57:33,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:57:33,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400787310] [2024-06-21 15:57:33,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:57:33,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:57:33,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:57:33,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:57:33,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:57:33,105 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:57:33,105 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 353 transitions, 4639 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 15:57:33,105 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:57:33,106 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:57:33,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:57:33,631 INFO L124 PetriNetUnfolderBase]: 2147/3698 cut-off events. [2024-06-21 15:57:33,632 INFO L125 PetriNetUnfolderBase]: For 203829/203829 co-relation queries the response was YES. [2024-06-21 15:57:33,663 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23355 conditions, 3698 events. 2147/3698 cut-off events. For 203829/203829 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 23681 event pairs, 444 based on Foata normal form. 1/3697 useless extension candidates. Maximal degree in co-relation 23224. Up to 3225 conditions per place. [2024-06-21 15:57:33,675 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 266 selfloop transitions, 97 changer transitions 0/371 dead transitions. [2024-06-21 15:57:33,675 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 371 transitions, 5409 flow [2024-06-21 15:57:33,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:57:33,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:57:33,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 189 transitions. [2024-06-21 15:57:33,676 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5762195121951219 [2024-06-21 15:57:33,676 INFO L175 Difference]: Start difference. First operand has 305 places, 353 transitions, 4639 flow. Second operand 8 states and 189 transitions. [2024-06-21 15:57:33,676 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 371 transitions, 5409 flow [2024-06-21 15:57:34,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 371 transitions, 4985 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-21 15:57:34,519 INFO L231 Difference]: Finished difference. Result has 307 places, 353 transitions, 4415 flow [2024-06-21 15:57:34,520 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4215, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=353, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4415, PETRI_PLACES=307, PETRI_TRANSITIONS=353} [2024-06-21 15:57:34,520 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 265 predicate places. [2024-06-21 15:57:34,520 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 353 transitions, 4415 flow [2024-06-21 15:57:34,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 15:57:34,520 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:57:34,520 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:57:34,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-21 15:57:34,520 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:57:34,521 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:57:34,521 INFO L85 PathProgramCache]: Analyzing trace with hash -207095112, now seen corresponding path program 11 times [2024-06-21 15:57:34,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:57:34,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723281518] [2024-06-21 15:57:34,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:57:34,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:57:34,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:57:34,617 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:57:34,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:57:34,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723281518] [2024-06-21 15:57:34,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723281518] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:57:34,618 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:57:34,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:57:34,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845645779] [2024-06-21 15:57:34,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:57:34,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:57:34,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:57:34,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:57:34,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:57:34,651 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:57:34,651 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 353 transitions, 4415 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 15:57:34,651 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:57:34,651 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:57:34,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:57:35,175 INFO L124 PetriNetUnfolderBase]: 2160/3720 cut-off events. [2024-06-21 15:57:35,176 INFO L125 PetriNetUnfolderBase]: For 210586/210586 co-relation queries the response was YES. [2024-06-21 15:57:35,208 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23382 conditions, 3720 events. 2160/3720 cut-off events. For 210586/210586 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 23870 event pairs, 444 based on Foata normal form. 1/3719 useless extension candidates. Maximal degree in co-relation 23250. Up to 3083 conditions per place. [2024-06-21 15:57:35,220 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 198 selfloop transitions, 173 changer transitions 0/379 dead transitions. [2024-06-21 15:57:35,220 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 379 transitions, 5569 flow [2024-06-21 15:57:35,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:57:35,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:57:35,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 193 transitions. [2024-06-21 15:57:35,221 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5884146341463414 [2024-06-21 15:57:35,221 INFO L175 Difference]: Start difference. First operand has 307 places, 353 transitions, 4415 flow. Second operand 8 states and 193 transitions. [2024-06-21 15:57:35,221 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 379 transitions, 5569 flow [2024-06-21 15:57:36,135 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 379 transitions, 5375 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-21 15:57:36,140 INFO L231 Difference]: Finished difference. Result has 308 places, 359 transitions, 4649 flow [2024-06-21 15:57:36,140 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4221, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=353, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=167, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4649, PETRI_PLACES=308, PETRI_TRANSITIONS=359} [2024-06-21 15:57:36,140 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 266 predicate places. [2024-06-21 15:57:36,140 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 359 transitions, 4649 flow [2024-06-21 15:57:36,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 15:57:36,141 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:57:36,141 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:57:36,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-21 15:57:36,141 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:57:36,141 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:57:36,141 INFO L85 PathProgramCache]: Analyzing trace with hash -207082092, now seen corresponding path program 12 times [2024-06-21 15:57:36,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:57:36,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139569840] [2024-06-21 15:57:36,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:57:36,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:57:36,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:57:36,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:57:36,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:57:36,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139569840] [2024-06-21 15:57:36,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139569840] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:57:36,253 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:57:36,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:57:36,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972751201] [2024-06-21 15:57:36,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:57:36,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:57:36,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:57:36,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:57:36,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:57:36,308 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:57:36,309 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 359 transitions, 4649 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 15:57:36,309 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:57:36,309 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:57:36,309 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:57:36,879 INFO L124 PetriNetUnfolderBase]: 2157/3721 cut-off events. [2024-06-21 15:57:36,879 INFO L125 PetriNetUnfolderBase]: For 213479/213479 co-relation queries the response was YES. [2024-06-21 15:57:36,912 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23549 conditions, 3721 events. 2157/3721 cut-off events. For 213479/213479 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 23898 event pairs, 432 based on Foata normal form. 1/3721 useless extension candidates. Maximal degree in co-relation 23416. Up to 3314 conditions per place. [2024-06-21 15:57:36,924 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 324 selfloop transitions, 45 changer transitions 0/377 dead transitions. [2024-06-21 15:57:36,924 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 377 transitions, 5431 flow [2024-06-21 15:57:36,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:57:36,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:57:36,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 185 transitions. [2024-06-21 15:57:36,925 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5640243902439024 [2024-06-21 15:57:36,925 INFO L175 Difference]: Start difference. First operand has 308 places, 359 transitions, 4649 flow. Second operand 8 states and 185 transitions. [2024-06-21 15:57:36,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 377 transitions, 5431 flow [2024-06-21 15:57:37,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 377 transitions, 5138 flow, removed 24 selfloop flow, removed 4 redundant places. [2024-06-21 15:57:37,780 INFO L231 Difference]: Finished difference. Result has 312 places, 359 transitions, 4452 flow [2024-06-21 15:57:37,781 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4356, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=359, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=314, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4452, PETRI_PLACES=312, PETRI_TRANSITIONS=359} [2024-06-21 15:57:37,781 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 270 predicate places. [2024-06-21 15:57:37,781 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 359 transitions, 4452 flow [2024-06-21 15:57:37,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 15:57:37,781 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:57:37,781 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:57:37,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-21 15:57:37,782 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:57:37,782 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:57:37,782 INFO L85 PathProgramCache]: Analyzing trace with hash 146917010, now seen corresponding path program 13 times [2024-06-21 15:57:37,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:57:37,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051926585] [2024-06-21 15:57:37,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:57:37,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:57:37,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:57:37,894 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:57:37,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:57:37,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051926585] [2024-06-21 15:57:37,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051926585] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:57:37,895 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:57:37,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:57:37,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719702878] [2024-06-21 15:57:37,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:57:37,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:57:37,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:57:37,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:57:37,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:57:37,958 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:57:37,958 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 359 transitions, 4452 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 15:57:37,958 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:57:37,958 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:57:37,958 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:57:38,611 INFO L124 PetriNetUnfolderBase]: 2178/3747 cut-off events. [2024-06-21 15:57:38,612 INFO L125 PetriNetUnfolderBase]: For 224255/224255 co-relation queries the response was YES. [2024-06-21 15:57:38,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23695 conditions, 3747 events. 2178/3747 cut-off events. For 224255/224255 co-relation queries the response was YES. Maximal size of possible extension queue 290. Compared 24048 event pairs, 442 based on Foata normal form. 1/3746 useless extension candidates. Maximal degree in co-relation 23561. Up to 3230 conditions per place. [2024-06-21 15:57:38,657 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 258 selfloop transitions, 119 changer transitions 0/385 dead transitions. [2024-06-21 15:57:38,657 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 385 transitions, 5671 flow [2024-06-21 15:57:38,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:57:38,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:57:38,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 189 transitions. [2024-06-21 15:57:38,658 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5762195121951219 [2024-06-21 15:57:38,658 INFO L175 Difference]: Start difference. First operand has 312 places, 359 transitions, 4452 flow. Second operand 8 states and 189 transitions. [2024-06-21 15:57:38,658 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 385 transitions, 5671 flow [2024-06-21 15:57:39,472 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 385 transitions, 5443 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-06-21 15:57:39,477 INFO L231 Difference]: Finished difference. Result has 311 places, 368 transitions, 4644 flow [2024-06-21 15:57:39,477 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4224, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=359, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=243, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4644, PETRI_PLACES=311, PETRI_TRANSITIONS=368} [2024-06-21 15:57:39,477 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 269 predicate places. [2024-06-21 15:57:39,477 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 368 transitions, 4644 flow [2024-06-21 15:57:39,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 15:57:39,477 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:57:39,477 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:57:39,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-21 15:57:39,478 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:57:39,478 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:57:39,478 INFO L85 PathProgramCache]: Analyzing trace with hash -936310348, now seen corresponding path program 14 times [2024-06-21 15:57:39,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:57:39,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325722115] [2024-06-21 15:57:39,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:57:39,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:57:39,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:57:39,581 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:57:39,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:57:39,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325722115] [2024-06-21 15:57:39,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325722115] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:57:39,582 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:57:39,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:57:39,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569600088] [2024-06-21 15:57:39,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:57:39,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:57:39,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:57:39,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:57:39,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:57:39,635 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:57:39,635 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 368 transitions, 4644 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 15:57:39,635 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:57:39,635 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:57:39,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:57:40,216 INFO L124 PetriNetUnfolderBase]: 2183/3760 cut-off events. [2024-06-21 15:57:40,216 INFO L125 PetriNetUnfolderBase]: For 229924/229924 co-relation queries the response was YES. [2024-06-21 15:57:40,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24016 conditions, 3760 events. 2183/3760 cut-off events. For 229924/229924 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 24175 event pairs, 444 based on Foata normal form. 1/3759 useless extension candidates. Maximal degree in co-relation 23881. Up to 3236 conditions per place. [2024-06-21 15:57:40,267 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 258 selfloop transitions, 124 changer transitions 0/390 dead transitions. [2024-06-21 15:57:40,267 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 390 transitions, 5808 flow [2024-06-21 15:57:40,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 15:57:40,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 15:57:40,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 229 transitions. [2024-06-21 15:57:40,268 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5585365853658537 [2024-06-21 15:57:40,268 INFO L175 Difference]: Start difference. First operand has 311 places, 368 transitions, 4644 flow. Second operand 10 states and 229 transitions. [2024-06-21 15:57:40,268 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 390 transitions, 5808 flow [2024-06-21 15:57:41,544 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 390 transitions, 5668 flow, removed 22 selfloop flow, removed 3 redundant places. [2024-06-21 15:57:41,548 INFO L231 Difference]: Finished difference. Result has 318 places, 371 transitions, 4814 flow [2024-06-21 15:57:41,549 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4510, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=368, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4814, PETRI_PLACES=318, PETRI_TRANSITIONS=371} [2024-06-21 15:57:41,549 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 276 predicate places. [2024-06-21 15:57:41,549 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 371 transitions, 4814 flow [2024-06-21 15:57:41,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 15:57:41,549 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:57:41,549 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:57:41,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-21 15:57:41,549 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:57:41,550 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:57:41,550 INFO L85 PathProgramCache]: Analyzing trace with hash 152457950, now seen corresponding path program 15 times [2024-06-21 15:57:41,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:57:41,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799576497] [2024-06-21 15:57:41,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:57:41,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:57:41,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:57:41,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:57:41,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:57:41,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799576497] [2024-06-21 15:57:41,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799576497] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:57:41,675 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:57:41,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:57:41,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556899022] [2024-06-21 15:57:41,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:57:41,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:57:41,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:57:41,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:57:41,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:57:41,714 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:57:41,714 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 371 transitions, 4814 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 15:57:41,715 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:57:41,715 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:57:41,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:57:42,389 INFO L124 PetriNetUnfolderBase]: 2188/3774 cut-off events. [2024-06-21 15:57:42,389 INFO L125 PetriNetUnfolderBase]: For 235221/235221 co-relation queries the response was YES. [2024-06-21 15:57:42,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24368 conditions, 3774 events. 2188/3774 cut-off events. For 235221/235221 co-relation queries the response was YES. Maximal size of possible extension queue 294. Compared 24307 event pairs, 432 based on Foata normal form. 1/3774 useless extension candidates. Maximal degree in co-relation 24231. Up to 3375 conditions per place. [2024-06-21 15:57:42,436 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 344 selfloop transitions, 40 changer transitions 0/392 dead transitions. [2024-06-21 15:57:42,436 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 392 transitions, 5832 flow [2024-06-21 15:57:42,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 15:57:42,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 15:57:42,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 220 transitions. [2024-06-21 15:57:42,437 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5365853658536586 [2024-06-21 15:57:42,437 INFO L175 Difference]: Start difference. First operand has 318 places, 371 transitions, 4814 flow. Second operand 10 states and 220 transitions. [2024-06-21 15:57:42,437 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 392 transitions, 5832 flow [2024-06-21 15:57:43,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 392 transitions, 5515 flow, removed 19 selfloop flow, removed 8 redundant places. [2024-06-21 15:57:43,481 INFO L231 Difference]: Finished difference. Result has 320 places, 374 transitions, 4645 flow [2024-06-21 15:57:43,482 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4509, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=371, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=331, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4645, PETRI_PLACES=320, PETRI_TRANSITIONS=374} [2024-06-21 15:57:43,482 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 278 predicate places. [2024-06-21 15:57:43,482 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 374 transitions, 4645 flow [2024-06-21 15:57:43,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 15:57:43,482 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:57:43,482 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:57:43,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-21 15:57:43,483 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:57:43,483 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:57:43,483 INFO L85 PathProgramCache]: Analyzing trace with hash 152724860, now seen corresponding path program 16 times [2024-06-21 15:57:43,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:57:43,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432676719] [2024-06-21 15:57:43,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:57:43,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:57:43,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:57:43,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:57:43,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:57:43,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432676719] [2024-06-21 15:57:43,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432676719] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:57:43,592 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:57:43,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:57:43,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2372598] [2024-06-21 15:57:43,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:57:43,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:57:43,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:57:43,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:57:43,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:57:43,637 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:57:43,638 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 374 transitions, 4645 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 15:57:43,638 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:57:43,638 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:57:43,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:57:44,294 INFO L124 PetriNetUnfolderBase]: 2198/3792 cut-off events. [2024-06-21 15:57:44,294 INFO L125 PetriNetUnfolderBase]: For 240136/240136 co-relation queries the response was YES. [2024-06-21 15:57:44,328 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24344 conditions, 3792 events. 2198/3792 cut-off events. For 240136/240136 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 24420 event pairs, 432 based on Foata normal form. 1/3792 useless extension candidates. Maximal degree in co-relation 24206. Up to 3385 conditions per place. [2024-06-21 15:57:44,340 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 346 selfloop transitions, 46 changer transitions 0/400 dead transitions. [2024-06-21 15:57:44,340 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 400 transitions, 5727 flow [2024-06-21 15:57:44,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 15:57:44,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 15:57:44,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 258 transitions. [2024-06-21 15:57:44,341 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.524390243902439 [2024-06-21 15:57:44,341 INFO L175 Difference]: Start difference. First operand has 320 places, 374 transitions, 4645 flow. Second operand 12 states and 258 transitions. [2024-06-21 15:57:44,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 400 transitions, 5727 flow [2024-06-21 15:57:45,291 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 400 transitions, 5605 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-21 15:57:45,296 INFO L231 Difference]: Finished difference. Result has 325 places, 380 transitions, 4719 flow [2024-06-21 15:57:45,297 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4539, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=374, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=334, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4719, PETRI_PLACES=325, PETRI_TRANSITIONS=380} [2024-06-21 15:57:45,297 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 283 predicate places. [2024-06-21 15:57:45,297 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 380 transitions, 4719 flow [2024-06-21 15:57:45,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 15:57:45,298 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:57:45,298 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:57:45,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-21 15:57:45,298 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:57:45,298 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:57:45,299 INFO L85 PathProgramCache]: Analyzing trace with hash 138648380, now seen corresponding path program 17 times [2024-06-21 15:57:45,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:57:45,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656559994] [2024-06-21 15:57:45,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:57:45,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:57:45,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:57:45,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:57:45,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:57:45,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656559994] [2024-06-21 15:57:45,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656559994] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:57:45,399 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:57:45,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:57:45,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271258782] [2024-06-21 15:57:45,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:57:45,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:57:45,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:57:45,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:57:45,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:57:45,434 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:57:45,434 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 380 transitions, 4719 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 15:57:45,434 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:57:45,434 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:57:45,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:57:46,037 INFO L124 PetriNetUnfolderBase]: 2195/3783 cut-off events. [2024-06-21 15:57:46,037 INFO L125 PetriNetUnfolderBase]: For 243010/243010 co-relation queries the response was YES. [2024-06-21 15:57:46,072 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24278 conditions, 3783 events. 2195/3783 cut-off events. For 243010/243010 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 24361 event pairs, 444 based on Foata normal form. 1/3782 useless extension candidates. Maximal degree in co-relation 24139. Up to 3249 conditions per place. [2024-06-21 15:57:46,084 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 256 selfloop transitions, 135 changer transitions 0/399 dead transitions. [2024-06-21 15:57:46,085 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 399 transitions, 5701 flow [2024-06-21 15:57:46,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 15:57:46,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 15:57:46,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 246 transitions. [2024-06-21 15:57:46,087 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5454545454545454 [2024-06-21 15:57:46,087 INFO L175 Difference]: Start difference. First operand has 325 places, 380 transitions, 4719 flow. Second operand 11 states and 246 transitions. [2024-06-21 15:57:46,087 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 399 transitions, 5701 flow [2024-06-21 15:57:47,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 399 transitions, 5577 flow, removed 16 selfloop flow, removed 9 redundant places. [2024-06-21 15:57:47,224 INFO L231 Difference]: Finished difference. Result has 327 places, 380 transitions, 4871 flow [2024-06-21 15:57:47,224 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4595, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=380, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4871, PETRI_PLACES=327, PETRI_TRANSITIONS=380} [2024-06-21 15:57:47,225 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 285 predicate places. [2024-06-21 15:57:47,225 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 380 transitions, 4871 flow [2024-06-21 15:57:47,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 15:57:47,225 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:57:47,225 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:57:47,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-21 15:57:47,225 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:57:47,225 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:57:47,226 INFO L85 PathProgramCache]: Analyzing trace with hash 147362480, now seen corresponding path program 18 times [2024-06-21 15:57:47,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:57:47,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113404838] [2024-06-21 15:57:47,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:57:47,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:57:47,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:57:47,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:57:47,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:57:47,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113404838] [2024-06-21 15:57:47,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113404838] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:57:47,370 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:57:47,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:57:47,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076480630] [2024-06-21 15:57:47,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:57:47,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:57:47,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:57:47,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:57:47,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:57:47,428 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:57:47,428 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 380 transitions, 4871 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 15:57:47,428 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:57:47,428 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:57:47,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:57:48,036 INFO L124 PetriNetUnfolderBase]: 2192/3784 cut-off events. [2024-06-21 15:57:48,037 INFO L125 PetriNetUnfolderBase]: For 245791/245791 co-relation queries the response was YES. [2024-06-21 15:57:48,072 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24417 conditions, 3784 events. 2192/3784 cut-off events. For 245791/245791 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 24408 event pairs, 432 based on Foata normal form. 1/3784 useless extension candidates. Maximal degree in co-relation 24277. Up to 3387 conditions per place. [2024-06-21 15:57:48,085 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 351 selfloop transitions, 36 changer transitions 0/395 dead transitions. [2024-06-21 15:57:48,086 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 395 transitions, 5681 flow [2024-06-21 15:57:48,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:57:48,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:57:48,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 182 transitions. [2024-06-21 15:57:48,086 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5548780487804879 [2024-06-21 15:57:48,087 INFO L175 Difference]: Start difference. First operand has 327 places, 380 transitions, 4871 flow. Second operand 8 states and 182 transitions. [2024-06-21 15:57:48,087 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 395 transitions, 5681 flow [2024-06-21 15:57:49,211 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 395 transitions, 5377 flow, removed 13 selfloop flow, removed 10 redundant places. [2024-06-21 15:57:49,216 INFO L231 Difference]: Finished difference. Result has 325 places, 380 transitions, 4645 flow [2024-06-21 15:57:49,216 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4567, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=380, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=344, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4645, PETRI_PLACES=325, PETRI_TRANSITIONS=380} [2024-06-21 15:57:49,216 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 283 predicate places. [2024-06-21 15:57:49,216 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 380 transitions, 4645 flow [2024-06-21 15:57:49,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 15:57:49,216 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:57:49,216 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:57:49,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-21 15:57:49,217 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:57:49,217 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:57:49,217 INFO L85 PathProgramCache]: Analyzing trace with hash -748404830, now seen corresponding path program 19 times [2024-06-21 15:57:49,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:57:49,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935650004] [2024-06-21 15:57:49,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:57:49,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:57:49,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:57:49,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:57:49,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:57:49,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935650004] [2024-06-21 15:57:49,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935650004] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:57:49,323 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:57:49,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:57:49,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723528096] [2024-06-21 15:57:49,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:57:49,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:57:49,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:57:49,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:57:49,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:57:49,371 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:57:49,371 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 380 transitions, 4645 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 15:57:49,371 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:57:49,372 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:57:49,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:57:49,975 INFO L124 PetriNetUnfolderBase]: 2213/3820 cut-off events. [2024-06-21 15:57:49,975 INFO L125 PetriNetUnfolderBase]: For 258180/258182 co-relation queries the response was YES. [2024-06-21 15:57:50,009 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24642 conditions, 3820 events. 2213/3820 cut-off events. For 258180/258182 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 24682 event pairs, 441 based on Foata normal form. 3/3822 useless extension candidates. Maximal degree in co-relation 24501. Up to 3276 conditions per place. [2024-06-21 15:57:50,021 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 300 selfloop transitions, 108 changer transitions 0/416 dead transitions. [2024-06-21 15:57:50,021 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 416 transitions, 5836 flow [2024-06-21 15:57:50,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:57:50,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:57:50,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 183 transitions. [2024-06-21 15:57:50,022 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6376306620209059 [2024-06-21 15:57:50,022 INFO L175 Difference]: Start difference. First operand has 325 places, 380 transitions, 4645 flow. Second operand 7 states and 183 transitions. [2024-06-21 15:57:50,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 416 transitions, 5836 flow [2024-06-21 15:57:51,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 416 transitions, 5748 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-21 15:57:51,156 INFO L231 Difference]: Finished difference. Result has 325 places, 389 transitions, 5021 flow [2024-06-21 15:57:51,157 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4557, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=380, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5021, PETRI_PLACES=325, PETRI_TRANSITIONS=389} [2024-06-21 15:57:51,157 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 283 predicate places. [2024-06-21 15:57:51,157 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 389 transitions, 5021 flow [2024-06-21 15:57:51,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 15:57:51,158 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:57:51,158 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:57:51,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-21 15:57:51,158 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:57:51,158 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:57:51,158 INFO L85 PathProgramCache]: Analyzing trace with hash -541751390, now seen corresponding path program 20 times [2024-06-21 15:57:51,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:57:51,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263565737] [2024-06-21 15:57:51,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:57:51,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:57:51,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:57:51,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:57:51,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:57:51,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263565737] [2024-06-21 15:57:51,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263565737] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:57:51,270 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:57:51,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:57:51,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373822454] [2024-06-21 15:57:51,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:57:51,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:57:51,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:57:51,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:57:51,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:57:51,320 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:57:51,320 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 389 transitions, 5021 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 15:57:51,321 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:57:51,321 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:57:51,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:57:51,966 INFO L124 PetriNetUnfolderBase]: 2210/3815 cut-off events. [2024-06-21 15:57:51,966 INFO L125 PetriNetUnfolderBase]: For 261320/261320 co-relation queries the response was YES. [2024-06-21 15:57:52,000 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24970 conditions, 3815 events. 2210/3815 cut-off events. For 261320/261320 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 24688 event pairs, 432 based on Foata normal form. 1/3815 useless extension candidates. Maximal degree in co-relation 24827. Up to 3273 conditions per place. [2024-06-21 15:57:52,012 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 302 selfloop transitions, 114 changer transitions 0/424 dead transitions. [2024-06-21 15:57:52,012 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 424 transitions, 6103 flow [2024-06-21 15:57:52,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 15:57:52,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 15:57:52,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 230 transitions. [2024-06-21 15:57:52,013 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6233062330623306 [2024-06-21 15:57:52,013 INFO L175 Difference]: Start difference. First operand has 325 places, 389 transitions, 5021 flow. Second operand 9 states and 230 transitions. [2024-06-21 15:57:52,013 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 424 transitions, 6103 flow [2024-06-21 15:57:53,302 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 424 transitions, 5914 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-21 15:57:53,307 INFO L231 Difference]: Finished difference. Result has 328 places, 389 transitions, 5083 flow [2024-06-21 15:57:53,307 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4832, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5083, PETRI_PLACES=328, PETRI_TRANSITIONS=389} [2024-06-21 15:57:53,307 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 286 predicate places. [2024-06-21 15:57:53,307 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 389 transitions, 5083 flow [2024-06-21 15:57:53,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 15:57:53,307 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:57:53,307 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:57:53,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-21 15:57:53,307 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:57:53,308 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:57:53,308 INFO L85 PathProgramCache]: Analyzing trace with hash -541484480, now seen corresponding path program 21 times [2024-06-21 15:57:53,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:57:53,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251876997] [2024-06-21 15:57:53,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:57:53,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:57:53,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:57:53,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:57:53,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:57:53,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251876997] [2024-06-21 15:57:53,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251876997] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:57:53,413 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:57:53,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:57:53,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412729797] [2024-06-21 15:57:53,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:57:53,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:57:53,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:57:53,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:57:53,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:57:53,461 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:57:53,462 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 389 transitions, 5083 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 15:57:53,462 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:57:53,462 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:57:53,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:57:54,111 INFO L124 PetriNetUnfolderBase]: 2207/3811 cut-off events. [2024-06-21 15:57:54,111 INFO L125 PetriNetUnfolderBase]: For 264327/264327 co-relation queries the response was YES. [2024-06-21 15:57:54,147 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24975 conditions, 3811 events. 2207/3811 cut-off events. For 264327/264327 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 24652 event pairs, 432 based on Foata normal form. 1/3811 useless extension candidates. Maximal degree in co-relation 24833. Up to 3270 conditions per place. [2024-06-21 15:57:54,161 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 298 selfloop transitions, 117 changer transitions 0/423 dead transitions. [2024-06-21 15:57:54,161 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 423 transitions, 5999 flow [2024-06-21 15:57:54,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 15:57:54,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 15:57:54,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 227 transitions. [2024-06-21 15:57:54,162 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6151761517615176 [2024-06-21 15:57:54,162 INFO L175 Difference]: Start difference. First operand has 328 places, 389 transitions, 5083 flow. Second operand 9 states and 227 transitions. [2024-06-21 15:57:54,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 423 transitions, 5999 flow [2024-06-21 15:57:55,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 423 transitions, 5731 flow, removed 17 selfloop flow, removed 8 redundant places. [2024-06-21 15:57:55,519 INFO L231 Difference]: Finished difference. Result has 329 places, 389 transitions, 5075 flow [2024-06-21 15:57:55,519 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4815, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5075, PETRI_PLACES=329, PETRI_TRANSITIONS=389} [2024-06-21 15:57:55,519 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 287 predicate places. [2024-06-21 15:57:55,519 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 389 transitions, 5075 flow [2024-06-21 15:57:55,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 15:57:55,519 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:57:55,519 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:57:55,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-21 15:57:55,519 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:57:55,520 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:57:55,520 INFO L85 PathProgramCache]: Analyzing trace with hash 969437982, now seen corresponding path program 22 times [2024-06-21 15:57:55,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:57:55,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828161895] [2024-06-21 15:57:55,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:57:55,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:57:55,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:57:55,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:57:55,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:57:55,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828161895] [2024-06-21 15:57:55,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828161895] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:57:55,620 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:57:55,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:57:55,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237323410] [2024-06-21 15:57:55,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:57:55,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:57:55,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:57:55,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:57:55,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:57:55,675 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:57:55,675 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 389 transitions, 5075 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 15:57:55,675 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:57:55,676 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:57:55,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:57:56,413 INFO L124 PetriNetUnfolderBase]: 2212/3815 cut-off events. [2024-06-21 15:57:56,413 INFO L125 PetriNetUnfolderBase]: For 264466/264466 co-relation queries the response was YES. [2024-06-21 15:57:56,442 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25052 conditions, 3815 events. 2212/3815 cut-off events. For 264466/264466 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 24690 event pairs, 444 based on Foata normal form. 1/3814 useless extension candidates. Maximal degree in co-relation 24910. Up to 3177 conditions per place. [2024-06-21 15:57:56,452 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 216 selfloop transitions, 196 changer transitions 0/420 dead transitions. [2024-06-21 15:57:56,452 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 420 transitions, 6354 flow [2024-06-21 15:57:56,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 15:57:56,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 15:57:56,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 238 transitions. [2024-06-21 15:57:56,453 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5804878048780487 [2024-06-21 15:57:56,453 INFO L175 Difference]: Start difference. First operand has 329 places, 389 transitions, 5075 flow. Second operand 10 states and 238 transitions. [2024-06-21 15:57:56,453 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 420 transitions, 6354 flow [2024-06-21 15:57:57,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 420 transitions, 6142 flow, removed 9 selfloop flow, removed 9 redundant places. [2024-06-21 15:57:57,646 INFO L231 Difference]: Finished difference. Result has 330 places, 392 transitions, 5340 flow [2024-06-21 15:57:57,646 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4875, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=193, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5340, PETRI_PLACES=330, PETRI_TRANSITIONS=392} [2024-06-21 15:57:57,647 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 288 predicate places. [2024-06-21 15:57:57,647 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 392 transitions, 5340 flow [2024-06-21 15:57:57,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 15:57:57,647 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:57:57,647 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:57:57,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-21 15:57:57,647 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:57:57,647 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:57:57,647 INFO L85 PathProgramCache]: Analyzing trace with hash 634838200, now seen corresponding path program 23 times [2024-06-21 15:57:57,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:57:57,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561029565] [2024-06-21 15:57:57,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:57:57,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:57:57,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:57:57,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:57:57,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:57:57,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561029565] [2024-06-21 15:57:57,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561029565] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:57:57,746 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:57:57,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:57:57,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177968472] [2024-06-21 15:57:57,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:57:57,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:57:57,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:57:57,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:57:57,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:57:57,792 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:57:57,792 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 392 transitions, 5340 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 15:57:57,792 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:57:57,792 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:57:57,792 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:57:58,443 INFO L124 PetriNetUnfolderBase]: 2209/3811 cut-off events. [2024-06-21 15:57:58,444 INFO L125 PetriNetUnfolderBase]: For 250382/250382 co-relation queries the response was YES. [2024-06-21 15:57:58,478 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24975 conditions, 3811 events. 2209/3811 cut-off events. For 250382/250382 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 24670 event pairs, 444 based on Foata normal form. 1/3810 useless extension candidates. Maximal degree in co-relation 24835. Up to 3174 conditions per place. [2024-06-21 15:57:58,491 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 221 selfloop transitions, 184 changer transitions 0/413 dead transitions. [2024-06-21 15:57:58,491 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 413 transitions, 6362 flow [2024-06-21 15:57:58,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:57:58,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:57:58,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-21 15:57:58,493 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-21 15:57:58,493 INFO L175 Difference]: Start difference. First operand has 330 places, 392 transitions, 5340 flow. Second operand 7 states and 175 transitions. [2024-06-21 15:57:58,493 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 413 transitions, 6362 flow [2024-06-21 15:57:59,593 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 413 transitions, 5716 flow, removed 44 selfloop flow, removed 11 redundant places. [2024-06-21 15:57:59,597 INFO L231 Difference]: Finished difference. Result has 326 places, 392 transitions, 5076 flow [2024-06-21 15:57:59,598 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4698, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=392, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=184, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5076, PETRI_PLACES=326, PETRI_TRANSITIONS=392} [2024-06-21 15:57:59,598 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 284 predicate places. [2024-06-21 15:57:59,598 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 392 transitions, 5076 flow [2024-06-21 15:57:59,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 15:57:59,598 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:57:59,598 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:57:59,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-21 15:57:59,599 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:57:59,599 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:57:59,599 INFO L85 PathProgramCache]: Analyzing trace with hash -1134499712, now seen corresponding path program 24 times [2024-06-21 15:57:59,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:57:59,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876241718] [2024-06-21 15:57:59,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:57:59,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:57:59,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:57:59,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:57:59,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:57:59,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876241718] [2024-06-21 15:57:59,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876241718] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:57:59,696 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:57:59,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:57:59,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072155267] [2024-06-21 15:57:59,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:57:59,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:57:59,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:57:59,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:57:59,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:57:59,728 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:57:59,729 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 392 transitions, 5076 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 15:57:59,729 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:57:59,729 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:57:59,729 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:58:00,378 INFO L124 PetriNetUnfolderBase]: 2214/3826 cut-off events. [2024-06-21 15:58:00,378 INFO L125 PetriNetUnfolderBase]: For 243722/243724 co-relation queries the response was YES. [2024-06-21 15:58:00,413 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24682 conditions, 3826 events. 2214/3826 cut-off events. For 243722/243724 co-relation queries the response was YES. Maximal size of possible extension queue 306. Compared 24802 event pairs, 441 based on Foata normal form. 3/3828 useless extension candidates. Maximal degree in co-relation 24544. Up to 3180 conditions per place. [2024-06-21 15:58:00,426 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 211 selfloop transitions, 203 changer transitions 0/422 dead transitions. [2024-06-21 15:58:00,427 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 422 transitions, 6184 flow [2024-06-21 15:58:00,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 15:58:00,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 15:58:00,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 235 transitions. [2024-06-21 15:58:00,428 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.573170731707317 [2024-06-21 15:58:00,428 INFO L175 Difference]: Start difference. First operand has 326 places, 392 transitions, 5076 flow. Second operand 10 states and 235 transitions. [2024-06-21 15:58:00,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 422 transitions, 6184 flow [2024-06-21 15:58:01,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 422 transitions, 5772 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-21 15:58:01,648 INFO L231 Difference]: Finished difference. Result has 329 places, 395 transitions, 5138 flow [2024-06-21 15:58:01,648 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4672, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=392, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=200, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5138, PETRI_PLACES=329, PETRI_TRANSITIONS=395} [2024-06-21 15:58:01,648 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 287 predicate places. [2024-06-21 15:58:01,648 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 395 transitions, 5138 flow [2024-06-21 15:58:01,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 15:58:01,648 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:58:01,648 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:58:01,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-21 15:58:01,649 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:58:01,649 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:58:01,649 INFO L85 PathProgramCache]: Analyzing trace with hash -378720418, now seen corresponding path program 25 times [2024-06-21 15:58:01,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:58:01,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123760362] [2024-06-21 15:58:01,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:58:01,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:58:01,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:58:01,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:58:01,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:58:01,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123760362] [2024-06-21 15:58:01,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123760362] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:58:01,774 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:58:01,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:58:01,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192165019] [2024-06-21 15:58:01,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:58:01,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:58:01,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:58:01,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:58:01,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:58:01,818 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:58:01,818 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 395 transitions, 5138 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 15:58:01,818 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:58:01,818 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:58:01,818 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:58:02,436 INFO L124 PetriNetUnfolderBase]: 2219/3835 cut-off events. [2024-06-21 15:58:02,436 INFO L125 PetriNetUnfolderBase]: For 243621/243623 co-relation queries the response was YES. [2024-06-21 15:58:02,470 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24774 conditions, 3835 events. 2219/3835 cut-off events. For 243621/243623 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 24853 event pairs, 441 based on Foata normal form. 3/3837 useless extension candidates. Maximal degree in co-relation 24636. Up to 3186 conditions per place. [2024-06-21 15:58:02,482 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 226 selfloop transitions, 197 changer transitions 0/431 dead transitions. [2024-06-21 15:58:02,482 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 431 transitions, 6438 flow [2024-06-21 15:58:02,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 15:58:02,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 15:58:02,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 226 transitions. [2024-06-21 15:58:02,483 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6124661246612466 [2024-06-21 15:58:02,483 INFO L175 Difference]: Start difference. First operand has 329 places, 395 transitions, 5138 flow. Second operand 9 states and 226 transitions. [2024-06-21 15:58:02,483 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 431 transitions, 6438 flow [2024-06-21 15:58:03,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 431 transitions, 6028 flow, removed 29 selfloop flow, removed 8 redundant places. [2024-06-21 15:58:03,618 INFO L231 Difference]: Finished difference. Result has 330 places, 398 transitions, 5196 flow [2024-06-21 15:58:03,618 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4745, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=395, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=194, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5196, PETRI_PLACES=330, PETRI_TRANSITIONS=398} [2024-06-21 15:58:03,618 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 288 predicate places. [2024-06-21 15:58:03,618 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 398 transitions, 5196 flow [2024-06-21 15:58:03,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 15:58:03,618 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:58:03,619 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:58:03,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-21 15:58:03,619 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:58:03,619 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:58:03,619 INFO L85 PathProgramCache]: Analyzing trace with hash -1141851362, now seen corresponding path program 26 times [2024-06-21 15:58:03,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:58:03,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65159155] [2024-06-21 15:58:03,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:58:03,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:58:03,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:58:03,717 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:58:03,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:58:03,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65159155] [2024-06-21 15:58:03,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65159155] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:58:03,718 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:58:03,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:58:03,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568558823] [2024-06-21 15:58:03,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:58:03,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:58:03,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:58:03,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:58:03,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:58:03,759 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:58:03,759 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 398 transitions, 5196 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 15:58:03,759 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:58:03,759 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:58:03,759 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:58:04,378 INFO L124 PetriNetUnfolderBase]: 2216/3831 cut-off events. [2024-06-21 15:58:04,378 INFO L125 PetriNetUnfolderBase]: For 240612/240614 co-relation queries the response was YES. [2024-06-21 15:58:04,411 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24639 conditions, 3831 events. 2216/3831 cut-off events. For 240612/240614 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 24834 event pairs, 441 based on Foata normal form. 3/3833 useless extension candidates. Maximal degree in co-relation 24501. Up to 3183 conditions per place. [2024-06-21 15:58:04,423 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 224 selfloop transitions, 200 changer transitions 0/432 dead transitions. [2024-06-21 15:58:04,423 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 432 transitions, 6286 flow [2024-06-21 15:58:04,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 15:58:04,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 15:58:04,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 263 transitions. [2024-06-21 15:58:04,424 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5831485587583148 [2024-06-21 15:58:04,424 INFO L175 Difference]: Start difference. First operand has 330 places, 398 transitions, 5196 flow. Second operand 11 states and 263 transitions. [2024-06-21 15:58:04,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 432 transitions, 6286 flow [2024-06-21 15:58:05,542 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 432 transitions, 5844 flow, removed 23 selfloop flow, removed 9 redundant places. [2024-06-21 15:58:05,546 INFO L231 Difference]: Finished difference. Result has 332 places, 398 transitions, 5172 flow [2024-06-21 15:58:05,547 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4758, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=398, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=200, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5172, PETRI_PLACES=332, PETRI_TRANSITIONS=398} [2024-06-21 15:58:05,547 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 290 predicate places. [2024-06-21 15:58:05,547 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 398 transitions, 5172 flow [2024-06-21 15:58:05,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 15:58:05,547 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:58:05,547 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:58:05,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-21 15:58:05,547 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:58:05,548 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:58:05,548 INFO L85 PathProgramCache]: Analyzing trace with hash 969432402, now seen corresponding path program 27 times [2024-06-21 15:58:05,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:58:05,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849803312] [2024-06-21 15:58:05,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:58:05,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:58:05,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:58:05,673 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:58:05,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:58:05,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849803312] [2024-06-21 15:58:05,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849803312] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:58:05,673 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:58:05,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:58:05,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297137958] [2024-06-21 15:58:05,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:58:05,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:58:05,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:58:05,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:58:05,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:58:05,717 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:58:05,717 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 398 transitions, 5172 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 15:58:05,717 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:58:05,717 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:58:05,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:58:06,419 INFO L124 PetriNetUnfolderBase]: 2213/3821 cut-off events. [2024-06-21 15:58:06,419 INFO L125 PetriNetUnfolderBase]: For 231784/231784 co-relation queries the response was YES. [2024-06-21 15:58:06,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24436 conditions, 3821 events. 2213/3821 cut-off events. For 231784/231784 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 24758 event pairs, 444 based on Foata normal form. 1/3820 useless extension candidates. Maximal degree in co-relation 24299. Up to 3180 conditions per place. [2024-06-21 15:58:06,468 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 221 selfloop transitions, 197 changer transitions 0/426 dead transitions. [2024-06-21 15:58:06,468 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 426 transitions, 6078 flow [2024-06-21 15:58:06,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 15:58:06,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 15:58:06,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 222 transitions. [2024-06-21 15:58:06,469 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6016260162601627 [2024-06-21 15:58:06,469 INFO L175 Difference]: Start difference. First operand has 332 places, 398 transitions, 5172 flow. Second operand 9 states and 222 transitions. [2024-06-21 15:58:06,470 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 426 transitions, 6078 flow [2024-06-21 15:58:07,608 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 426 transitions, 5560 flow, removed 13 selfloop flow, removed 13 redundant places. [2024-06-21 15:58:07,612 INFO L231 Difference]: Finished difference. Result has 328 places, 398 transitions, 5062 flow [2024-06-21 15:58:07,612 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4654, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=398, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=197, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5062, PETRI_PLACES=328, PETRI_TRANSITIONS=398} [2024-06-21 15:58:07,613 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 286 predicate places. [2024-06-21 15:58:07,613 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 398 transitions, 5062 flow [2024-06-21 15:58:07,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 15:58:07,613 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:58:07,613 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:58:07,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-21 15:58:07,613 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:58:07,614 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:58:07,614 INFO L85 PathProgramCache]: Analyzing trace with hash 152949982, now seen corresponding path program 1 times [2024-06-21 15:58:07,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:58:07,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62253075] [2024-06-21 15:58:07,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:58:07,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:58:07,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:58:07,740 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:58:07,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:58:07,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62253075] [2024-06-21 15:58:07,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62253075] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:58:07,740 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:58:07,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:58:07,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026199534] [2024-06-21 15:58:07,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:58:07,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:58:07,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:58:07,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:58:07,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:58:07,800 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:58:07,800 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 398 transitions, 5062 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 15:58:07,800 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:58:07,800 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:58:07,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:58:08,457 INFO L124 PetriNetUnfolderBase]: 2253/3898 cut-off events. [2024-06-21 15:58:08,457 INFO L125 PetriNetUnfolderBase]: For 241158/241158 co-relation queries the response was YES. [2024-06-21 15:58:08,493 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24681 conditions, 3898 events. 2253/3898 cut-off events. For 241158/241158 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 25341 event pairs, 438 based on Foata normal form. 6/3903 useless extension candidates. Maximal degree in co-relation 24545. Up to 3418 conditions per place. [2024-06-21 15:58:08,507 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 378 selfloop transitions, 38 changer transitions 0/424 dead transitions. [2024-06-21 15:58:08,507 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 424 transitions, 6023 flow [2024-06-21 15:58:08,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 15:58:08,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 15:58:08,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 222 transitions. [2024-06-21 15:58:08,508 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5414634146341464 [2024-06-21 15:58:08,508 INFO L175 Difference]: Start difference. First operand has 328 places, 398 transitions, 5062 flow. Second operand 10 states and 222 transitions. [2024-06-21 15:58:08,508 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 424 transitions, 6023 flow [2024-06-21 15:58:09,504 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 424 transitions, 5566 flow, removed 2 selfloop flow, removed 11 redundant places. [2024-06-21 15:58:09,509 INFO L231 Difference]: Finished difference. Result has 328 places, 400 transitions, 4732 flow [2024-06-21 15:58:09,509 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4605, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=398, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=360, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4732, PETRI_PLACES=328, PETRI_TRANSITIONS=400} [2024-06-21 15:58:09,509 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 286 predicate places. [2024-06-21 15:58:09,509 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 400 transitions, 4732 flow [2024-06-21 15:58:09,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 15:58:09,509 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:58:09,510 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:58:09,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-21 15:58:09,510 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:58:09,510 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:58:09,510 INFO L85 PathProgramCache]: Analyzing trace with hash 983739584, now seen corresponding path program 2 times [2024-06-21 15:58:09,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:58:09,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459928828] [2024-06-21 15:58:09,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:58:09,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:58:09,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:58:09,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:58:09,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:58:09,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459928828] [2024-06-21 15:58:09,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459928828] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:58:09,623 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:58:09,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:58:09,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327108287] [2024-06-21 15:58:09,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:58:09,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:58:09,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:58:09,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:58:09,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:58:09,660 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:58:09,660 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 400 transitions, 4732 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 15:58:09,660 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:58:09,660 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:58:09,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:58:10,309 INFO L124 PetriNetUnfolderBase]: 2314/3999 cut-off events. [2024-06-21 15:58:10,309 INFO L125 PetriNetUnfolderBase]: For 235900/235900 co-relation queries the response was YES. [2024-06-21 15:58:10,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24898 conditions, 3999 events. 2314/3999 cut-off events. For 235900/235900 co-relation queries the response was YES. Maximal size of possible extension queue 323. Compared 26118 event pairs, 442 based on Foata normal form. 6/4004 useless extension candidates. Maximal degree in co-relation 24762. Up to 3431 conditions per place. [2024-06-21 15:58:10,356 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 371 selfloop transitions, 54 changer transitions 0/433 dead transitions. [2024-06-21 15:58:10,356 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 433 transitions, 5776 flow [2024-06-21 15:58:10,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 15:58:10,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 15:58:10,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 208 transitions. [2024-06-21 15:58:10,357 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5636856368563685 [2024-06-21 15:58:10,357 INFO L175 Difference]: Start difference. First operand has 328 places, 400 transitions, 4732 flow. Second operand 9 states and 208 transitions. [2024-06-21 15:58:10,357 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 433 transitions, 5776 flow [2024-06-21 15:58:11,217 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 433 transitions, 5696 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-21 15:58:11,222 INFO L231 Difference]: Finished difference. Result has 331 places, 407 transitions, 4882 flow [2024-06-21 15:58:11,222 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4652, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=400, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=349, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4882, PETRI_PLACES=331, PETRI_TRANSITIONS=407} [2024-06-21 15:58:11,222 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 289 predicate places. [2024-06-21 15:58:11,222 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 407 transitions, 4882 flow [2024-06-21 15:58:11,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 15:58:11,222 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:58:11,222 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:58:11,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-21 15:58:11,223 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:58:11,223 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:58:11,223 INFO L85 PathProgramCache]: Analyzing trace with hash -541259358, now seen corresponding path program 3 times [2024-06-21 15:58:11,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:58:11,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979507105] [2024-06-21 15:58:11,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:58:11,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:58:11,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:58:11,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:58:11,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:58:11,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979507105] [2024-06-21 15:58:11,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979507105] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:58:11,333 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:58:11,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:58:11,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957314059] [2024-06-21 15:58:11,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:58:11,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:58:11,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:58:11,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:58:11,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:58:11,371 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:58:11,371 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 407 transitions, 4882 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 15:58:11,371 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:58:11,371 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:58:11,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:58:12,032 INFO L124 PetriNetUnfolderBase]: 2334/4035 cut-off events. [2024-06-21 15:58:12,032 INFO L125 PetriNetUnfolderBase]: For 242687/242687 co-relation queries the response was YES. [2024-06-21 15:58:12,067 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25311 conditions, 4035 events. 2334/4035 cut-off events. For 242687/242687 co-relation queries the response was YES. Maximal size of possible extension queue 326. Compared 26432 event pairs, 414 based on Foata normal form. 6/4040 useless extension candidates. Maximal degree in co-relation 25173. Up to 3343 conditions per place. [2024-06-21 15:58:12,081 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 371 selfloop transitions, 57 changer transitions 0/436 dead transitions. [2024-06-21 15:58:12,081 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 436 transitions, 5884 flow [2024-06-21 15:58:12,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:58:12,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:58:12,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-21 15:58:12,081 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-21 15:58:12,081 INFO L175 Difference]: Start difference. First operand has 331 places, 407 transitions, 4882 flow. Second operand 7 states and 175 transitions. [2024-06-21 15:58:12,082 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 436 transitions, 5884 flow [2024-06-21 15:58:13,078 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 436 transitions, 5760 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-21 15:58:13,083 INFO L231 Difference]: Finished difference. Result has 333 places, 408 transitions, 4906 flow [2024-06-21 15:58:13,084 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4760, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=407, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=350, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4906, PETRI_PLACES=333, PETRI_TRANSITIONS=408} [2024-06-21 15:58:13,084 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 291 predicate places. [2024-06-21 15:58:13,084 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 408 transitions, 4906 flow [2024-06-21 15:58:13,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 15:58:13,085 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:58:13,085 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:58:13,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-21 15:58:13,085 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:58:13,085 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:58:13,085 INFO L85 PathProgramCache]: Analyzing trace with hash -275562078, now seen corresponding path program 4 times [2024-06-21 15:58:13,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:58:13,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048144719] [2024-06-21 15:58:13,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:58:13,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:58:13,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:58:13,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:58:13,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:58:13,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048144719] [2024-06-21 15:58:13,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048144719] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:58:13,223 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:58:13,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:58:13,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028236053] [2024-06-21 15:58:13,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:58:13,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:58:13,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:58:13,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:58:13,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:58:13,279 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:58:13,279 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 408 transitions, 4906 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 15:58:13,279 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:58:13,279 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:58:13,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:58:13,909 INFO L124 PetriNetUnfolderBase]: 2321/4017 cut-off events. [2024-06-21 15:58:13,909 INFO L125 PetriNetUnfolderBase]: For 225548/225550 co-relation queries the response was YES. [2024-06-21 15:58:13,947 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24727 conditions, 4017 events. 2321/4017 cut-off events. For 225548/225550 co-relation queries the response was YES. Maximal size of possible extension queue 326. Compared 26351 event pairs, 418 based on Foata normal form. 8/4024 useless extension candidates. Maximal degree in co-relation 24588. Up to 3286 conditions per place. [2024-06-21 15:58:13,960 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 370 selfloop transitions, 56 changer transitions 0/434 dead transitions. [2024-06-21 15:58:13,960 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 434 transitions, 5874 flow [2024-06-21 15:58:13,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:58:13,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:58:13,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-21 15:58:13,961 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5993031358885017 [2024-06-21 15:58:13,961 INFO L175 Difference]: Start difference. First operand has 333 places, 408 transitions, 4906 flow. Second operand 7 states and 172 transitions. [2024-06-21 15:58:13,961 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 434 transitions, 5874 flow [2024-06-21 15:58:14,950 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 334 places, 434 transitions, 5748 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-21 15:58:14,954 INFO L231 Difference]: Finished difference. Result has 335 places, 408 transitions, 4896 flow [2024-06-21 15:58:14,954 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4780, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=408, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=352, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4896, PETRI_PLACES=335, PETRI_TRANSITIONS=408} [2024-06-21 15:58:14,954 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 293 predicate places. [2024-06-21 15:58:14,955 INFO L495 AbstractCegarLoop]: Abstraction has has 335 places, 408 transitions, 4896 flow [2024-06-21 15:58:14,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 15:58:14,955 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:58:14,955 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:58:14,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-21 15:58:14,955 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:58:14,956 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:58:14,956 INFO L85 PathProgramCache]: Analyzing trace with hash 1207237920, now seen corresponding path program 1 times [2024-06-21 15:58:14,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:58:14,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001848530] [2024-06-21 15:58:14,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:58:14,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:58:14,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:58:15,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:58:15,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:58:15,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001848530] [2024-06-21 15:58:15,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001848530] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:58:15,055 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:58:15,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:58:15,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729055188] [2024-06-21 15:58:15,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:58:15,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:58:15,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:58:15,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:58:15,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:58:15,090 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:58:15,091 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 335 places, 408 transitions, 4896 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 15:58:15,091 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:58:15,091 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:58:15,091 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:58:15,719 INFO L124 PetriNetUnfolderBase]: 2334/4036 cut-off events. [2024-06-21 15:58:15,719 INFO L125 PetriNetUnfolderBase]: For 213103/213103 co-relation queries the response was YES. [2024-06-21 15:58:15,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24882 conditions, 4036 events. 2334/4036 cut-off events. For 213103/213103 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 26449 event pairs, 451 based on Foata normal form. 1/4036 useless extension candidates. Maximal degree in co-relation 24742. Up to 3570 conditions per place. [2024-06-21 15:58:15,768 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 401 selfloop transitions, 36 changer transitions 0/445 dead transitions. [2024-06-21 15:58:15,768 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 445 transitions, 6098 flow [2024-06-21 15:58:15,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:58:15,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:58:15,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-21 15:58:15,769 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.600609756097561 [2024-06-21 15:58:15,769 INFO L175 Difference]: Start difference. First operand has 335 places, 408 transitions, 4896 flow. Second operand 8 states and 197 transitions. [2024-06-21 15:58:15,769 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 445 transitions, 6098 flow [2024-06-21 15:58:16,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 445 transitions, 5942 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-21 15:58:16,753 INFO L231 Difference]: Finished difference. Result has 337 places, 414 transitions, 4920 flow [2024-06-21 15:58:16,753 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4740, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=408, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=375, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4920, PETRI_PLACES=337, PETRI_TRANSITIONS=414} [2024-06-21 15:58:16,753 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 295 predicate places. [2024-06-21 15:58:16,753 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 414 transitions, 4920 flow [2024-06-21 15:58:16,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 15:58:16,753 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:58:16,754 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:58:16,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-21 15:58:16,754 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:58:16,754 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:58:16,754 INFO L85 PathProgramCache]: Analyzing trace with hash 693214508, now seen corresponding path program 1 times [2024-06-21 15:58:16,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:58:16,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974800077] [2024-06-21 15:58:16,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:58:16,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:58:16,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:58:16,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:58:16,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:58:16,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974800077] [2024-06-21 15:58:16,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974800077] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:58:16,872 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:58:16,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:58:16,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460364618] [2024-06-21 15:58:16,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:58:16,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:58:16,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:58:16,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:58:16,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:58:16,919 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:58:16,919 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 414 transitions, 4920 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 15:58:16,919 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:58:16,919 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:58:16,919 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:58:17,568 INFO L124 PetriNetUnfolderBase]: 2352/4065 cut-off events. [2024-06-21 15:58:17,568 INFO L125 PetriNetUnfolderBase]: For 222672/222672 co-relation queries the response was YES. [2024-06-21 15:58:17,605 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25209 conditions, 4065 events. 2352/4065 cut-off events. For 222672/222672 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 26671 event pairs, 451 based on Foata normal form. 1/4065 useless extension candidates. Maximal degree in co-relation 25069. Up to 3572 conditions per place. [2024-06-21 15:58:17,617 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 391 selfloop transitions, 52 changer transitions 0/451 dead transitions. [2024-06-21 15:58:17,618 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 451 transitions, 6165 flow [2024-06-21 15:58:17,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:58:17,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:58:17,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-21 15:58:17,618 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.600609756097561 [2024-06-21 15:58:17,618 INFO L175 Difference]: Start difference. First operand has 337 places, 414 transitions, 4920 flow. Second operand 8 states and 197 transitions. [2024-06-21 15:58:17,618 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 451 transitions, 6165 flow [2024-06-21 15:58:18,446 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 340 places, 451 transitions, 6061 flow, removed 33 selfloop flow, removed 4 redundant places. [2024-06-21 15:58:18,451 INFO L231 Difference]: Finished difference. Result has 342 places, 423 transitions, 5073 flow [2024-06-21 15:58:18,451 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4821, PETRI_DIFFERENCE_MINUEND_PLACES=333, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=414, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=367, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5073, PETRI_PLACES=342, PETRI_TRANSITIONS=423} [2024-06-21 15:58:18,451 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 300 predicate places. [2024-06-21 15:58:18,451 INFO L495 AbstractCegarLoop]: Abstraction has has 342 places, 423 transitions, 5073 flow [2024-06-21 15:58:18,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 15:58:18,452 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:58:18,452 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:58:18,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-21 15:58:18,452 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:58:18,452 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:58:18,452 INFO L85 PathProgramCache]: Analyzing trace with hash -1810829494, now seen corresponding path program 2 times [2024-06-21 15:58:18,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:58:18,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61732252] [2024-06-21 15:58:18,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:58:18,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:58:18,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:58:18,561 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:58:18,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:58:18,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61732252] [2024-06-21 15:58:18,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61732252] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:58:18,562 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:58:18,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:58:18,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673043479] [2024-06-21 15:58:18,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:58:18,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:58:18,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:58:18,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:58:18,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:58:18,607 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:58:18,608 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 342 places, 423 transitions, 5073 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 15:58:18,608 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:58:18,608 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:58:18,608 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:58:19,244 INFO L124 PetriNetUnfolderBase]: 2357/4072 cut-off events. [2024-06-21 15:58:19,244 INFO L125 PetriNetUnfolderBase]: For 224771/224771 co-relation queries the response was YES. [2024-06-21 15:58:19,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25581 conditions, 4072 events. 2357/4072 cut-off events. For 224771/224771 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 26749 event pairs, 450 based on Foata normal form. 1/4072 useless extension candidates. Maximal degree in co-relation 25438. Up to 3614 conditions per place. [2024-06-21 15:58:19,292 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 411 selfloop transitions, 34 changer transitions 0/453 dead transitions. [2024-06-21 15:58:19,292 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 453 transitions, 6065 flow [2024-06-21 15:58:19,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:58:19,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:58:19,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-06-21 15:58:19,293 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-21 15:58:19,293 INFO L175 Difference]: Start difference. First operand has 342 places, 423 transitions, 5073 flow. Second operand 8 states and 192 transitions. [2024-06-21 15:58:19,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 453 transitions, 6065 flow [2024-06-21 15:58:20,308 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 453 transitions, 5861 flow, removed 38 selfloop flow, removed 4 redundant places. [2024-06-21 15:58:20,313 INFO L231 Difference]: Finished difference. Result has 346 places, 426 transitions, 4983 flow [2024-06-21 15:58:20,313 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4869, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=423, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=389, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4983, PETRI_PLACES=346, PETRI_TRANSITIONS=426} [2024-06-21 15:58:20,314 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 304 predicate places. [2024-06-21 15:58:20,314 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 426 transitions, 4983 flow [2024-06-21 15:58:20,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 15:58:20,314 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:58:20,314 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:58:20,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-21 15:58:20,315 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:58:20,315 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:58:20,315 INFO L85 PathProgramCache]: Analyzing trace with hash 1401307282, now seen corresponding path program 2 times [2024-06-21 15:58:20,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:58:20,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138559339] [2024-06-21 15:58:20,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:58:20,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:58:20,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:58:20,421 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:58:20,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:58:20,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138559339] [2024-06-21 15:58:20,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138559339] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:58:20,422 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:58:20,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:58:20,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602503620] [2024-06-21 15:58:20,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:58:20,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:58:20,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:58:20,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:58:20,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:58:20,468 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:58:20,469 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 426 transitions, 4983 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 15:58:20,469 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:58:20,469 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:58:20,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:58:21,146 INFO L124 PetriNetUnfolderBase]: 2385/4121 cut-off events. [2024-06-21 15:58:21,146 INFO L125 PetriNetUnfolderBase]: For 232659/232659 co-relation queries the response was YES. [2024-06-21 15:58:21,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25933 conditions, 4121 events. 2385/4121 cut-off events. For 232659/232659 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 27069 event pairs, 453 based on Foata normal form. 1/4121 useless extension candidates. Maximal degree in co-relation 25790. Up to 3604 conditions per place. [2024-06-21 15:58:21,198 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 397 selfloop transitions, 68 changer transitions 0/473 dead transitions. [2024-06-21 15:58:21,198 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 473 transitions, 6515 flow [2024-06-21 15:58:21,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 15:58:21,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 15:58:21,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 255 transitions. [2024-06-21 15:58:21,199 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.565410199556541 [2024-06-21 15:58:21,199 INFO L175 Difference]: Start difference. First operand has 346 places, 426 transitions, 4983 flow. Second operand 11 states and 255 transitions. [2024-06-21 15:58:21,199 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 473 transitions, 6515 flow [2024-06-21 15:58:22,266 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 473 transitions, 6407 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-21 15:58:22,271 INFO L231 Difference]: Finished difference. Result has 352 places, 441 transitions, 5241 flow [2024-06-21 15:58:22,272 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4889, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=426, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=371, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5241, PETRI_PLACES=352, PETRI_TRANSITIONS=441} [2024-06-21 15:58:22,272 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 310 predicate places. [2024-06-21 15:58:22,272 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 441 transitions, 5241 flow [2024-06-21 15:58:22,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 15:58:22,272 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:58:22,273 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:58:22,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-21 15:58:22,273 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:58:22,273 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:58:22,273 INFO L85 PathProgramCache]: Analyzing trace with hash -60332038, now seen corresponding path program 3 times [2024-06-21 15:58:22,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:58:22,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763564075] [2024-06-21 15:58:22,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:58:22,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:58:22,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:58:22,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:58:22,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:58:22,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763564075] [2024-06-21 15:58:22,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763564075] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:58:22,390 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:58:22,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:58:22,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191904589] [2024-06-21 15:58:22,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:58:22,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:58:22,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:58:22,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:58:22,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:58:22,425 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:58:22,425 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 441 transitions, 5241 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 15:58:22,425 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:58:22,425 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:58:22,425 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:58:23,106 INFO L124 PetriNetUnfolderBase]: 2382/4119 cut-off events. [2024-06-21 15:58:23,106 INFO L125 PetriNetUnfolderBase]: For 234842/234842 co-relation queries the response was YES. [2024-06-21 15:58:23,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25953 conditions, 4119 events. 2382/4119 cut-off events. For 234842/234842 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 27141 event pairs, 453 based on Foata normal form. 1/4119 useless extension candidates. Maximal degree in co-relation 25808. Up to 3601 conditions per place. [2024-06-21 15:58:23,157 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 397 selfloop transitions, 66 changer transitions 0/471 dead transitions. [2024-06-21 15:58:23,157 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 471 transitions, 6401 flow [2024-06-21 15:58:23,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 15:58:23,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 15:58:23,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 238 transitions. [2024-06-21 15:58:23,158 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5804878048780487 [2024-06-21 15:58:23,158 INFO L175 Difference]: Start difference. First operand has 352 places, 441 transitions, 5241 flow. Second operand 10 states and 238 transitions. [2024-06-21 15:58:23,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 471 transitions, 6401 flow [2024-06-21 15:58:24,259 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 471 transitions, 6235 flow, removed 34 selfloop flow, removed 4 redundant places. [2024-06-21 15:58:24,264 INFO L231 Difference]: Finished difference. Result has 358 places, 441 transitions, 5213 flow [2024-06-21 15:58:24,264 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5075, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=441, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=375, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5213, PETRI_PLACES=358, PETRI_TRANSITIONS=441} [2024-06-21 15:58:24,265 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 316 predicate places. [2024-06-21 15:58:24,265 INFO L495 AbstractCegarLoop]: Abstraction has has 358 places, 441 transitions, 5213 flow [2024-06-21 15:58:24,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 15:58:24,265 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:58:24,265 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:58:24,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-21 15:58:24,265 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:58:24,266 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:58:24,266 INFO L85 PathProgramCache]: Analyzing trace with hash 697855952, now seen corresponding path program 3 times [2024-06-21 15:58:24,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:58:24,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840712946] [2024-06-21 15:58:24,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:58:24,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:58:24,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:58:24,384 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:58:24,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:58:24,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840712946] [2024-06-21 15:58:24,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840712946] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:58:24,385 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:58:24,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:58:24,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781234402] [2024-06-21 15:58:24,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:58:24,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:58:24,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:58:24,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:58:24,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:58:24,433 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:58:24,433 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 358 places, 441 transitions, 5213 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 15:58:24,433 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:58:24,433 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:58:24,433 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:58:25,139 INFO L124 PetriNetUnfolderBase]: 2387/4124 cut-off events. [2024-06-21 15:58:25,139 INFO L125 PetriNetUnfolderBase]: For 239989/239989 co-relation queries the response was YES. [2024-06-21 15:58:25,178 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26028 conditions, 4124 events. 2387/4124 cut-off events. For 239989/239989 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 27181 event pairs, 450 based on Foata normal form. 1/4124 useless extension candidates. Maximal degree in co-relation 25882. Up to 3649 conditions per place. [2024-06-21 15:58:25,192 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 422 selfloop transitions, 44 changer transitions 0/474 dead transitions. [2024-06-21 15:58:25,192 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 474 transitions, 6259 flow [2024-06-21 15:58:25,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 15:58:25,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 15:58:25,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 249 transitions. [2024-06-21 15:58:25,193 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5521064301552107 [2024-06-21 15:58:25,193 INFO L175 Difference]: Start difference. First operand has 358 places, 441 transitions, 5213 flow. Second operand 11 states and 249 transitions. [2024-06-21 15:58:25,193 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 474 transitions, 6259 flow [2024-06-21 15:58:26,274 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 359 places, 474 transitions, 6107 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-21 15:58:26,279 INFO L231 Difference]: Finished difference. Result has 360 places, 444 transitions, 5201 flow [2024-06-21 15:58:26,279 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5061, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=441, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=397, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5201, PETRI_PLACES=360, PETRI_TRANSITIONS=444} [2024-06-21 15:58:26,280 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 318 predicate places. [2024-06-21 15:58:26,280 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 444 transitions, 5201 flow [2024-06-21 15:58:26,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 15:58:26,280 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:58:26,280 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:58:26,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-21 15:58:26,280 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:58:26,280 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:58:26,280 INFO L85 PathProgramCache]: Analyzing trace with hash 214164340, now seen corresponding path program 4 times [2024-06-21 15:58:26,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:58:26,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528662243] [2024-06-21 15:58:26,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:58:26,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:58:26,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:58:26,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:58:26,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:58:26,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528662243] [2024-06-21 15:58:26,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528662243] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:58:26,374 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:58:26,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:58:26,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800102420] [2024-06-21 15:58:26,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:58:26,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:58:26,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:58:26,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:58:26,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:58:26,416 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:58:26,416 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 444 transitions, 5201 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 15:58:26,416 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:58:26,416 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:58:26,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:58:27,062 INFO L124 PetriNetUnfolderBase]: 2408/4153 cut-off events. [2024-06-21 15:58:27,062 INFO L125 PetriNetUnfolderBase]: For 252893/252893 co-relation queries the response was YES. [2024-06-21 15:58:27,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26467 conditions, 4153 events. 2408/4153 cut-off events. For 252893/252893 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 27312 event pairs, 463 based on Foata normal form. 1/4152 useless extension candidates. Maximal degree in co-relation 26320. Up to 3404 conditions per place. [2024-06-21 15:58:27,116 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 349 selfloop transitions, 130 changer transitions 0/487 dead transitions. [2024-06-21 15:58:27,116 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 367 places, 487 transitions, 7115 flow [2024-06-21 15:58:27,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:58:27,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:58:27,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 205 transitions. [2024-06-21 15:58:27,117 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-21 15:58:27,117 INFO L175 Difference]: Start difference. First operand has 360 places, 444 transitions, 5201 flow. Second operand 8 states and 205 transitions. [2024-06-21 15:58:27,117 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 367 places, 487 transitions, 7115 flow [2024-06-21 15:58:28,573 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 487 transitions, 6969 flow, removed 16 selfloop flow, removed 12 redundant places. [2024-06-21 15:58:28,578 INFO L231 Difference]: Finished difference. Result has 356 places, 456 transitions, 5551 flow [2024-06-21 15:58:28,578 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5055, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=444, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=323, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5551, PETRI_PLACES=356, PETRI_TRANSITIONS=456} [2024-06-21 15:58:28,578 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 314 predicate places. [2024-06-21 15:58:28,579 INFO L495 AbstractCegarLoop]: Abstraction has has 356 places, 456 transitions, 5551 flow [2024-06-21 15:58:28,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 15:58:28,579 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:58:28,579 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:58:28,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-21 15:58:28,579 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:58:28,579 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:58:28,579 INFO L85 PathProgramCache]: Analyzing trace with hash 1690022356, now seen corresponding path program 5 times [2024-06-21 15:58:28,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:58:28,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006132092] [2024-06-21 15:58:28,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:58:28,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:58:28,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:58:28,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:58:28,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:58:28,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006132092] [2024-06-21 15:58:28,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006132092] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:58:28,681 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:58:28,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:58:28,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928717847] [2024-06-21 15:58:28,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:58:28,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:58:28,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:58:28,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:58:28,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:58:28,727 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:58:28,727 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 356 places, 456 transitions, 5551 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 15:58:28,727 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:58:28,727 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:58:28,727 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:58:29,380 INFO L124 PetriNetUnfolderBase]: 2418/4172 cut-off events. [2024-06-21 15:58:29,380 INFO L125 PetriNetUnfolderBase]: For 261892/261894 co-relation queries the response was YES. [2024-06-21 15:58:29,419 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27212 conditions, 4172 events. 2418/4172 cut-off events. For 261892/261894 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 27520 event pairs, 456 based on Foata normal form. 3/4174 useless extension candidates. Maximal degree in co-relation 27066. Up to 3607 conditions per place. [2024-06-21 15:58:29,433 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 404 selfloop transitions, 74 changer transitions 0/486 dead transitions. [2024-06-21 15:58:29,433 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 363 places, 486 transitions, 6656 flow [2024-06-21 15:58:29,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:58:29,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:58:29,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 193 transitions. [2024-06-21 15:58:29,434 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5884146341463414 [2024-06-21 15:58:29,434 INFO L175 Difference]: Start difference. First operand has 356 places, 456 transitions, 5551 flow. Second operand 8 states and 193 transitions. [2024-06-21 15:58:29,434 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 363 places, 486 transitions, 6656 flow [2024-06-21 15:58:30,714 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 486 transitions, 6455 flow, removed 66 selfloop flow, removed 2 redundant places. [2024-06-21 15:58:30,719 INFO L231 Difference]: Finished difference. Result has 362 places, 462 transitions, 5599 flow [2024-06-21 15:58:30,720 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5378, PETRI_DIFFERENCE_MINUEND_PLACES=354, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=456, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=385, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5599, PETRI_PLACES=362, PETRI_TRANSITIONS=462} [2024-06-21 15:58:30,720 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 320 predicate places. [2024-06-21 15:58:30,720 INFO L495 AbstractCegarLoop]: Abstraction has has 362 places, 462 transitions, 5599 flow [2024-06-21 15:58:30,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 15:58:30,720 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:58:30,720 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:58:30,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-21 15:58:30,720 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:58:30,720 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:58:30,721 INFO L85 PathProgramCache]: Analyzing trace with hash 1690022542, now seen corresponding path program 4 times [2024-06-21 15:58:30,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:58:30,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999504489] [2024-06-21 15:58:30,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:58:30,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:58:30,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:58:30,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:58:30,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:58:30,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999504489] [2024-06-21 15:58:30,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999504489] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:58:30,813 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:58:30,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:58:30,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771752322] [2024-06-21 15:58:30,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:58:30,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:58:30,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:58:30,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:58:30,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:58:30,848 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:58:30,848 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 462 transitions, 5599 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 15:58:30,848 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:58:30,848 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:58:30,848 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:58:31,503 INFO L124 PetriNetUnfolderBase]: 2431/4198 cut-off events. [2024-06-21 15:58:31,503 INFO L125 PetriNetUnfolderBase]: For 270917/270919 co-relation queries the response was YES. [2024-06-21 15:58:31,545 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27577 conditions, 4198 events. 2431/4198 cut-off events. For 270917/270919 co-relation queries the response was YES. Maximal size of possible extension queue 356. Compared 27773 event pairs, 462 based on Foata normal form. 3/4200 useless extension candidates. Maximal degree in co-relation 27429. Up to 3501 conditions per place. [2024-06-21 15:58:31,559 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 358 selfloop transitions, 132 changer transitions 0/498 dead transitions. [2024-06-21 15:58:31,559 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 498 transitions, 7329 flow [2024-06-21 15:58:31,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:58:31,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:58:31,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 200 transitions. [2024-06-21 15:58:31,560 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-21 15:58:31,560 INFO L175 Difference]: Start difference. First operand has 362 places, 462 transitions, 5599 flow. Second operand 8 states and 200 transitions. [2024-06-21 15:58:31,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 498 transitions, 7329 flow [2024-06-21 15:58:33,263 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 498 transitions, 7161 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-21 15:58:33,268 INFO L231 Difference]: Finished difference. Result has 365 places, 471 transitions, 5887 flow [2024-06-21 15:58:33,268 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5431, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=462, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=336, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5887, PETRI_PLACES=365, PETRI_TRANSITIONS=471} [2024-06-21 15:58:33,269 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 323 predicate places. [2024-06-21 15:58:33,269 INFO L495 AbstractCegarLoop]: Abstraction has has 365 places, 471 transitions, 5887 flow [2024-06-21 15:58:33,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 15:58:33,269 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:58:33,269 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:58:33,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-21 15:58:33,269 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:58:33,269 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:58:33,269 INFO L85 PathProgramCache]: Analyzing trace with hash -1686682252, now seen corresponding path program 6 times [2024-06-21 15:58:33,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:58:33,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372706339] [2024-06-21 15:58:33,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:58:33,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:58:33,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:58:33,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:58:33,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:58:33,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372706339] [2024-06-21 15:58:33,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372706339] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:58:33,366 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:58:33,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:58:33,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202901969] [2024-06-21 15:58:33,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:58:33,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:58:33,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:58:33,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:58:33,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:58:33,405 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:58:33,405 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 471 transitions, 5887 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 15:58:33,405 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:58:33,405 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:58:33,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:58:34,143 INFO L124 PetriNetUnfolderBase]: 2436/4206 cut-off events. [2024-06-21 15:58:34,143 INFO L125 PetriNetUnfolderBase]: For 279275/279275 co-relation queries the response was YES. [2024-06-21 15:58:34,180 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28068 conditions, 4206 events. 2436/4206 cut-off events. For 279275/279275 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 27849 event pairs, 465 based on Foata normal form. 1/4205 useless extension candidates. Maximal degree in co-relation 27919. Up to 3438 conditions per place. [2024-06-21 15:58:34,193 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 353 selfloop transitions, 143 changer transitions 0/504 dead transitions. [2024-06-21 15:58:34,193 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 504 transitions, 7501 flow [2024-06-21 15:58:34,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:58:34,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:58:34,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 203 transitions. [2024-06-21 15:58:34,194 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6189024390243902 [2024-06-21 15:58:34,194 INFO L175 Difference]: Start difference. First operand has 365 places, 471 transitions, 5887 flow. Second operand 8 states and 203 transitions. [2024-06-21 15:58:34,194 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 504 transitions, 7501 flow [2024-06-21 15:58:35,865 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 504 transitions, 7337 flow, removed 40 selfloop flow, removed 3 redundant places. [2024-06-21 15:58:35,871 INFO L231 Difference]: Finished difference. Result has 370 places, 474 transitions, 6053 flow [2024-06-21 15:58:35,871 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5723, PETRI_DIFFERENCE_MINUEND_PLACES=362, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=471, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=140, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=331, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6053, PETRI_PLACES=370, PETRI_TRANSITIONS=474} [2024-06-21 15:58:35,871 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 328 predicate places. [2024-06-21 15:58:35,871 INFO L495 AbstractCegarLoop]: Abstraction has has 370 places, 474 transitions, 6053 flow [2024-06-21 15:58:35,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 15:58:35,871 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:58:35,871 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:58:35,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-21 15:58:35,872 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:58:35,872 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:58:35,872 INFO L85 PathProgramCache]: Analyzing trace with hash -1482267322, now seen corresponding path program 7 times [2024-06-21 15:58:35,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:58:35,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101661840] [2024-06-21 15:58:35,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:58:35,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:58:35,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:58:35,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:58:35,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:58:35,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101661840] [2024-06-21 15:58:35,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101661840] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:58:35,979 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:58:35,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:58:35,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534293173] [2024-06-21 15:58:35,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:58:35,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:58:35,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:58:35,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:58:35,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:58:36,028 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:58:36,028 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 370 places, 474 transitions, 6053 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 15:58:36,029 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:58:36,029 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:58:36,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:58:36,698 INFO L124 PetriNetUnfolderBase]: 2441/4215 cut-off events. [2024-06-21 15:58:36,698 INFO L125 PetriNetUnfolderBase]: For 285600/285600 co-relation queries the response was YES. [2024-06-21 15:58:36,742 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28458 conditions, 4215 events. 2441/4215 cut-off events. For 285600/285600 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 27896 event pairs, 465 based on Foata normal form. 1/4214 useless extension candidates. Maximal degree in co-relation 28307. Up to 3444 conditions per place. [2024-06-21 15:58:36,757 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 350 selfloop transitions, 145 changer transitions 0/503 dead transitions. [2024-06-21 15:58:36,757 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 377 places, 503 transitions, 7495 flow [2024-06-21 15:58:36,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:58:36,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:58:36,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-06-21 15:58:36,758 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6067073170731707 [2024-06-21 15:58:36,758 INFO L175 Difference]: Start difference. First operand has 370 places, 474 transitions, 6053 flow. Second operand 8 states and 199 transitions. [2024-06-21 15:58:36,758 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 377 places, 503 transitions, 7495 flow [2024-06-21 15:58:38,471 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 503 transitions, 7159 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-21 15:58:38,477 INFO L231 Difference]: Finished difference. Result has 372 places, 477 transitions, 6057 flow [2024-06-21 15:58:38,477 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5727, PETRI_DIFFERENCE_MINUEND_PLACES=364, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=474, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=332, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6057, PETRI_PLACES=372, PETRI_TRANSITIONS=477} [2024-06-21 15:58:38,477 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 330 predicate places. [2024-06-21 15:58:38,477 INFO L495 AbstractCegarLoop]: Abstraction has has 372 places, 477 transitions, 6057 flow [2024-06-21 15:58:38,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 15:58:38,477 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:58:38,477 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:58:38,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-21 15:58:38,478 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:58:38,478 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:58:38,478 INFO L85 PathProgramCache]: Analyzing trace with hash -1366976152, now seen corresponding path program 8 times [2024-06-21 15:58:38,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:58:38,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592557944] [2024-06-21 15:58:38,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:58:38,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:58:38,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:58:38,581 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:58:38,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:58:38,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592557944] [2024-06-21 15:58:38,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592557944] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:58:38,582 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:58:38,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:58:38,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063008644] [2024-06-21 15:58:38,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:58:38,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:58:38,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:58:38,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:58:38,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:58:38,626 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:58:38,627 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 372 places, 477 transitions, 6057 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 15:58:38,627 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:58:38,627 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:58:38,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:58:39,330 INFO L124 PetriNetUnfolderBase]: 2459/4243 cut-off events. [2024-06-21 15:58:39,330 INFO L125 PetriNetUnfolderBase]: For 295228/295230 co-relation queries the response was YES. [2024-06-21 15:58:39,375 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28751 conditions, 4243 events. 2459/4243 cut-off events. For 295228/295230 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 28152 event pairs, 456 based on Foata normal form. 3/4245 useless extension candidates. Maximal degree in co-relation 28599. Up to 3650 conditions per place. [2024-06-21 15:58:39,389 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 413 selfloop transitions, 87 changer transitions 0/508 dead transitions. [2024-06-21 15:58:39,389 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 508 transitions, 7405 flow [2024-06-21 15:58:39,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:58:39,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:58:39,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-06-21 15:58:39,390 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-21 15:58:39,390 INFO L175 Difference]: Start difference. First operand has 372 places, 477 transitions, 6057 flow. Second operand 8 states and 192 transitions. [2024-06-21 15:58:39,390 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 508 transitions, 7405 flow [2024-06-21 15:58:41,357 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 374 places, 508 transitions, 7132 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-21 15:58:41,362 INFO L231 Difference]: Finished difference. Result has 376 places, 486 transitions, 6112 flow [2024-06-21 15:58:41,362 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5795, PETRI_DIFFERENCE_MINUEND_PLACES=367, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=477, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=393, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6112, PETRI_PLACES=376, PETRI_TRANSITIONS=486} [2024-06-21 15:58:41,363 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 334 predicate places. [2024-06-21 15:58:41,363 INFO L495 AbstractCegarLoop]: Abstraction has has 376 places, 486 transitions, 6112 flow [2024-06-21 15:58:41,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 15:58:41,363 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:58:41,363 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:58:41,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-21 15:58:41,364 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:58:41,364 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:58:41,364 INFO L85 PathProgramCache]: Analyzing trace with hash -1367183356, now seen corresponding path program 5 times [2024-06-21 15:58:41,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:58:41,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136553606] [2024-06-21 15:58:41,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:58:41,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:58:41,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:58:41,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:58:41,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:58:41,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136553606] [2024-06-21 15:58:41,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136553606] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:58:41,461 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:58:41,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:58:41,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694577892] [2024-06-21 15:58:41,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:58:41,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:58:41,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:58:41,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:58:41,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:58:41,493 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:58:41,494 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 376 places, 486 transitions, 6112 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 15:58:41,494 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:58:41,494 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:58:41,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:58:42,168 INFO L124 PetriNetUnfolderBase]: 2472/4265 cut-off events. [2024-06-21 15:58:42,168 INFO L125 PetriNetUnfolderBase]: For 305114/305116 co-relation queries the response was YES. [2024-06-21 15:58:42,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28916 conditions, 4265 events. 2472/4265 cut-off events. For 305114/305116 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 28323 event pairs, 460 based on Foata normal form. 3/4267 useless extension candidates. Maximal degree in co-relation 28762. Up to 3552 conditions per place. [2024-06-21 15:58:42,229 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 374 selfloop transitions, 134 changer transitions 0/516 dead transitions. [2024-06-21 15:58:42,229 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 383 places, 516 transitions, 7798 flow [2024-06-21 15:58:42,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:58:42,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:58:42,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-06-21 15:58:42,230 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6036585365853658 [2024-06-21 15:58:42,230 INFO L175 Difference]: Start difference. First operand has 376 places, 486 transitions, 6112 flow. Second operand 8 states and 198 transitions. [2024-06-21 15:58:42,230 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 383 places, 516 transitions, 7798 flow [2024-06-21 15:58:44,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 380 places, 516 transitions, 7656 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-21 15:58:44,328 INFO L231 Difference]: Finished difference. Result has 381 places, 492 transitions, 6328 flow [2024-06-21 15:58:44,328 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5970, PETRI_DIFFERENCE_MINUEND_PLACES=373, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=486, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=358, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6328, PETRI_PLACES=381, PETRI_TRANSITIONS=492} [2024-06-21 15:58:44,328 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 339 predicate places. [2024-06-21 15:58:44,328 INFO L495 AbstractCegarLoop]: Abstraction has has 381 places, 492 transitions, 6328 flow [2024-06-21 15:58:44,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 15:58:44,329 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:58:44,329 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:58:44,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-21 15:58:44,329 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:58:44,329 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:58:44,330 INFO L85 PathProgramCache]: Analyzing trace with hash -1367183542, now seen corresponding path program 9 times [2024-06-21 15:58:44,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:58:44,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892188255] [2024-06-21 15:58:44,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:58:44,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:58:44,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:58:44,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:58:44,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:58:44,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892188255] [2024-06-21 15:58:44,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892188255] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:58:44,442 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:58:44,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:58:44,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206160080] [2024-06-21 15:58:44,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:58:44,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:58:44,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:58:44,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:58:44,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:58:44,486 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:58:44,487 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 381 places, 492 transitions, 6328 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 15:58:44,487 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:58:44,487 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:58:44,487 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:58:45,210 INFO L124 PetriNetUnfolderBase]: 2469/4261 cut-off events. [2024-06-21 15:58:45,210 INFO L125 PetriNetUnfolderBase]: For 307920/307922 co-relation queries the response was YES. [2024-06-21 15:58:45,252 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28985 conditions, 4261 events. 2469/4261 cut-off events. For 307920/307922 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 28292 event pairs, 456 based on Foata normal form. 3/4263 useless extension candidates. Maximal degree in co-relation 28830. Up to 3665 conditions per place. [2024-06-21 15:58:45,267 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 419 selfloop transitions, 88 changer transitions 0/515 dead transitions. [2024-06-21 15:58:45,267 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 390 places, 515 transitions, 7398 flow [2024-06-21 15:58:45,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 15:58:45,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 15:58:45,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 229 transitions. [2024-06-21 15:58:45,268 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5585365853658537 [2024-06-21 15:58:45,268 INFO L175 Difference]: Start difference. First operand has 381 places, 492 transitions, 6328 flow. Second operand 10 states and 229 transitions. [2024-06-21 15:58:45,268 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 390 places, 515 transitions, 7398 flow [2024-06-21 15:58:46,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 386 places, 515 transitions, 7144 flow, removed 25 selfloop flow, removed 4 redundant places. [2024-06-21 15:58:46,963 INFO L231 Difference]: Finished difference. Result has 387 places, 492 transitions, 6256 flow [2024-06-21 15:58:46,964 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6074, PETRI_DIFFERENCE_MINUEND_PLACES=377, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=492, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=404, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6256, PETRI_PLACES=387, PETRI_TRANSITIONS=492} [2024-06-21 15:58:46,964 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 345 predicate places. [2024-06-21 15:58:46,964 INFO L495 AbstractCegarLoop]: Abstraction has has 387 places, 492 transitions, 6256 flow [2024-06-21 15:58:46,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 15:58:46,964 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:58:46,965 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:58:46,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-21 15:58:46,965 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:58:46,965 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:58:46,965 INFO L85 PathProgramCache]: Analyzing trace with hash -1765674116, now seen corresponding path program 6 times [2024-06-21 15:58:46,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:58:46,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564868747] [2024-06-21 15:58:46,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:58:46,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:58:46,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:58:47,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:58:47,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:58:47,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564868747] [2024-06-21 15:58:47,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564868747] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:58:47,072 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:58:47,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:58:47,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756217192] [2024-06-21 15:58:47,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:58:47,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:58:47,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:58:47,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:58:47,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:58:47,119 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:58:47,119 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 387 places, 492 transitions, 6256 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 15:58:47,119 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:58:47,119 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:58:47,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:58:47,845 INFO L124 PetriNetUnfolderBase]: 2466/4257 cut-off events. [2024-06-21 15:58:47,845 INFO L125 PetriNetUnfolderBase]: For 309692/309694 co-relation queries the response was YES. [2024-06-21 15:58:47,887 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28831 conditions, 4257 events. 2466/4257 cut-off events. For 309692/309694 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 28308 event pairs, 460 based on Foata normal form. 3/4259 useless extension candidates. Maximal degree in co-relation 28675. Up to 3545 conditions per place. [2024-06-21 15:58:47,900 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 371 selfloop transitions, 136 changer transitions 0/515 dead transitions. [2024-06-21 15:58:47,900 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 394 places, 515 transitions, 7686 flow [2024-06-21 15:58:47,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:58:47,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:58:47,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-21 15:58:47,901 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5975609756097561 [2024-06-21 15:58:47,901 INFO L175 Difference]: Start difference. First operand has 387 places, 492 transitions, 6256 flow. Second operand 8 states and 196 transitions. [2024-06-21 15:58:47,901 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 394 places, 515 transitions, 7686 flow [2024-06-21 15:58:49,668 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 385 places, 515 transitions, 7460 flow, removed 14 selfloop flow, removed 9 redundant places. [2024-06-21 15:58:49,674 INFO L231 Difference]: Finished difference. Result has 386 places, 492 transitions, 6308 flow [2024-06-21 15:58:49,674 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6030, PETRI_DIFFERENCE_MINUEND_PLACES=378, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=492, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=356, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6308, PETRI_PLACES=386, PETRI_TRANSITIONS=492} [2024-06-21 15:58:49,674 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 344 predicate places. [2024-06-21 15:58:49,674 INFO L495 AbstractCegarLoop]: Abstraction has has 386 places, 492 transitions, 6308 flow [2024-06-21 15:58:49,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 15:58:49,675 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:58:49,675 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:58:49,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-21 15:58:49,675 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:58:49,675 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:58:49,676 INFO L85 PathProgramCache]: Analyzing trace with hash -1329888000, now seen corresponding path program 7 times [2024-06-21 15:58:49,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:58:49,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336902876] [2024-06-21 15:58:49,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:58:49,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:58:49,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:58:49,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:58:49,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:58:49,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336902876] [2024-06-21 15:58:49,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336902876] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:58:49,778 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:58:49,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:58:49,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758308878] [2024-06-21 15:58:49,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:58:49,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:58:49,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:58:49,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:58:49,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:58:49,812 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:58:49,813 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 386 places, 492 transitions, 6308 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 15:58:49,813 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:58:49,813 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:58:49,813 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:58:50,543 INFO L124 PetriNetUnfolderBase]: 2497/4303 cut-off events. [2024-06-21 15:58:50,543 INFO L125 PetriNetUnfolderBase]: For 324395/324395 co-relation queries the response was YES. [2024-06-21 15:58:50,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29528 conditions, 4303 events. 2497/4303 cut-off events. For 324395/324395 co-relation queries the response was YES. Maximal size of possible extension queue 374. Compared 28521 event pairs, 451 based on Foata normal form. 1/4303 useless extension candidates. Maximal degree in co-relation 29371. Up to 3785 conditions per place. [2024-06-21 15:58:50,601 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 464 selfloop transitions, 57 changer transitions 0/529 dead transitions. [2024-06-21 15:58:50,601 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 395 places, 529 transitions, 8022 flow [2024-06-21 15:58:50,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 15:58:50,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 15:58:50,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 228 transitions. [2024-06-21 15:58:50,602 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5560975609756098 [2024-06-21 15:58:50,602 INFO L175 Difference]: Start difference. First operand has 386 places, 492 transitions, 6308 flow. Second operand 10 states and 228 transitions. [2024-06-21 15:58:50,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 395 places, 529 transitions, 8022 flow [2024-06-21 15:58:52,530 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 388 places, 529 transitions, 7712 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-21 15:58:52,536 INFO L231 Difference]: Finished difference. Result has 390 places, 507 transitions, 6394 flow [2024-06-21 15:58:52,536 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6026, PETRI_DIFFERENCE_MINUEND_PLACES=379, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=492, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=444, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6394, PETRI_PLACES=390, PETRI_TRANSITIONS=507} [2024-06-21 15:58:52,536 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 348 predicate places. [2024-06-21 15:58:52,536 INFO L495 AbstractCegarLoop]: Abstraction has has 390 places, 507 transitions, 6394 flow [2024-06-21 15:58:52,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 15:58:52,536 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:58:52,536 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:58:52,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-21 15:58:52,537 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:58:52,537 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:58:52,537 INFO L85 PathProgramCache]: Analyzing trace with hash -1330125150, now seen corresponding path program 8 times [2024-06-21 15:58:52,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:58:52,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144065546] [2024-06-21 15:58:52,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:58:52,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:58:52,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:58:52,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:58:52,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:58:52,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144065546] [2024-06-21 15:58:52,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144065546] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:58:52,638 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:58:52,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:58:52,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801251138] [2024-06-21 15:58:52,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:58:52,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:58:52,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:58:52,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:58:52,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:58:52,671 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:58:52,672 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 390 places, 507 transitions, 6394 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 15:58:52,672 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:58:52,672 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:58:52,672 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:58:53,411 INFO L124 PetriNetUnfolderBase]: 2494/4299 cut-off events. [2024-06-21 15:58:53,412 INFO L125 PetriNetUnfolderBase]: For 325863/325863 co-relation queries the response was YES. [2024-06-21 15:58:53,458 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29281 conditions, 4299 events. 2494/4299 cut-off events. For 325863/325863 co-relation queries the response was YES. Maximal size of possible extension queue 374. Compared 28555 event pairs, 451 based on Foata normal form. 1/4299 useless extension candidates. Maximal degree in co-relation 29122. Up to 3782 conditions per place. [2024-06-21 15:58:53,605 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 462 selfloop transitions, 56 changer transitions 0/526 dead transitions. [2024-06-21 15:58:53,605 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 397 places, 526 transitions, 7660 flow [2024-06-21 15:58:53,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:58:53,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:58:53,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 189 transitions. [2024-06-21 15:58:53,606 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5762195121951219 [2024-06-21 15:58:53,606 INFO L175 Difference]: Start difference. First operand has 390 places, 507 transitions, 6394 flow. Second operand 8 states and 189 transitions. [2024-06-21 15:58:53,606 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 397 places, 526 transitions, 7660 flow [2024-06-21 15:58:55,525 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 395 places, 526 transitions, 7561 flow, removed 35 selfloop flow, removed 2 redundant places. [2024-06-21 15:58:55,531 INFO L231 Difference]: Finished difference. Result has 396 places, 507 transitions, 6413 flow [2024-06-21 15:58:55,531 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6295, PETRI_DIFFERENCE_MINUEND_PLACES=388, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=507, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=451, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6413, PETRI_PLACES=396, PETRI_TRANSITIONS=507} [2024-06-21 15:58:55,531 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 354 predicate places. [2024-06-21 15:58:55,531 INFO L495 AbstractCegarLoop]: Abstraction has has 396 places, 507 transitions, 6413 flow [2024-06-21 15:58:55,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 15:58:55,531 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:58:55,532 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:58:55,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-21 15:58:55,532 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:58:55,532 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:58:55,532 INFO L85 PathProgramCache]: Analyzing trace with hash 291852756, now seen corresponding path program 10 times [2024-06-21 15:58:55,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:58:55,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641284590] [2024-06-21 15:58:55,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:58:55,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:58:55,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:58:55,639 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:58:55,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:58:55,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641284590] [2024-06-21 15:58:55,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641284590] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:58:55,640 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:58:55,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:58:55,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034453306] [2024-06-21 15:58:55,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:58:55,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:58:55,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:58:55,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:58:55,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:58:55,683 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:58:55,683 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 396 places, 507 transitions, 6413 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 15:58:55,683 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:58:55,683 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:58:55,683 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:58:56,435 INFO L124 PetriNetUnfolderBase]: 2499/4312 cut-off events. [2024-06-21 15:58:56,435 INFO L125 PetriNetUnfolderBase]: For 332391/332391 co-relation queries the response was YES. [2024-06-21 15:58:56,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29475 conditions, 4312 events. 2499/4312 cut-off events. For 332391/332391 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 28686 event pairs, 452 based on Foata normal form. 1/4312 useless extension candidates. Maximal degree in co-relation 29314. Up to 3825 conditions per place. [2024-06-21 15:58:56,498 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 489 selfloop transitions, 31 changer transitions 0/528 dead transitions. [2024-06-21 15:58:56,498 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 403 places, 528 transitions, 7549 flow [2024-06-21 15:58:56,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:58:56,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:58:56,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 183 transitions. [2024-06-21 15:58:56,499 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5579268292682927 [2024-06-21 15:58:56,499 INFO L175 Difference]: Start difference. First operand has 396 places, 507 transitions, 6413 flow. Second operand 8 states and 183 transitions. [2024-06-21 15:58:56,499 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 403 places, 528 transitions, 7549 flow [2024-06-21 15:58:58,391 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 396 places, 528 transitions, 7437 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-21 15:58:58,396 INFO L231 Difference]: Finished difference. Result has 397 places, 510 transitions, 6427 flow [2024-06-21 15:58:58,396 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6301, PETRI_DIFFERENCE_MINUEND_PLACES=389, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=507, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=476, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6427, PETRI_PLACES=397, PETRI_TRANSITIONS=510} [2024-06-21 15:58:58,397 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 355 predicate places. [2024-06-21 15:58:58,397 INFO L495 AbstractCegarLoop]: Abstraction has has 397 places, 510 transitions, 6427 flow [2024-06-21 15:58:58,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 15:58:58,397 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:58:58,397 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:58:58,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-21 15:58:58,397 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:58:58,398 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:58:58,398 INFO L85 PathProgramCache]: Analyzing trace with hash 439467936, now seen corresponding path program 11 times [2024-06-21 15:58:58,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:58:58,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148531287] [2024-06-21 15:58:58,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:58:58,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:58:58,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:58:58,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:58:58,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:58:58,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148531287] [2024-06-21 15:58:58,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148531287] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:58:58,502 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:58:58,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:58:58,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478570744] [2024-06-21 15:58:58,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:58:58,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:58:58,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:58:58,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:58:58,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:58:58,556 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:58:58,557 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 397 places, 510 transitions, 6427 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 15:58:58,557 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:58:58,557 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:58:58,557 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:58:59,288 INFO L124 PetriNetUnfolderBase]: 2530/4362 cut-off events. [2024-06-21 15:58:59,289 INFO L125 PetriNetUnfolderBase]: For 348498/348500 co-relation queries the response was YES. [2024-06-21 15:58:59,333 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30019 conditions, 4362 events. 2530/4362 cut-off events. For 348498/348500 co-relation queries the response was YES. Maximal size of possible extension queue 384. Compared 29086 event pairs, 456 based on Foata normal form. 3/4364 useless extension candidates. Maximal degree in co-relation 29857. Up to 3722 conditions per place. [2024-06-21 15:58:59,347 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 423 selfloop transitions, 115 changer transitions 0/546 dead transitions. [2024-06-21 15:58:59,348 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 405 places, 546 transitions, 8144 flow [2024-06-21 15:58:59,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 15:58:59,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 15:58:59,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 210 transitions. [2024-06-21 15:58:59,348 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5691056910569106 [2024-06-21 15:58:59,349 INFO L175 Difference]: Start difference. First operand has 397 places, 510 transitions, 6427 flow. Second operand 9 states and 210 transitions. [2024-06-21 15:58:59,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 405 places, 546 transitions, 8144 flow [2024-06-21 15:59:01,510 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 401 places, 546 transitions, 8058 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-21 15:59:01,516 INFO L231 Difference]: Finished difference. Result has 404 places, 525 transitions, 6851 flow [2024-06-21 15:59:01,516 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6341, PETRI_DIFFERENCE_MINUEND_PLACES=393, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=510, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=401, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6851, PETRI_PLACES=404, PETRI_TRANSITIONS=525} [2024-06-21 15:59:01,516 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 362 predicate places. [2024-06-21 15:59:01,516 INFO L495 AbstractCegarLoop]: Abstraction has has 404 places, 525 transitions, 6851 flow [2024-06-21 15:59:01,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 15:59:01,517 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:59:01,517 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:59:01,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-21 15:59:01,517 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:59:01,517 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:59:01,517 INFO L85 PathProgramCache]: Analyzing trace with hash 667749642, now seen corresponding path program 9 times [2024-06-21 15:59:01,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:59:01,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476339457] [2024-06-21 15:59:01,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:59:01,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:59:01,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:59:01,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:59:01,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:59:01,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476339457] [2024-06-21 15:59:01,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476339457] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:59:01,612 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:59:01,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:59:01,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264532674] [2024-06-21 15:59:01,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:59:01,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:59:01,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:59:01,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:59:01,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:59:01,654 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:59:01,654 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 404 places, 525 transitions, 6851 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 15:59:01,654 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:59:01,654 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:59:01,654 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:59:02,402 INFO L124 PetriNetUnfolderBase]: 2551/4401 cut-off events. [2024-06-21 15:59:02,403 INFO L125 PetriNetUnfolderBase]: For 365732/365734 co-relation queries the response was YES. [2024-06-21 15:59:02,451 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30787 conditions, 4401 events. 2551/4401 cut-off events. For 365732/365734 co-relation queries the response was YES. Maximal size of possible extension queue 391. Compared 29437 event pairs, 462 based on Foata normal form. 3/4403 useless extension candidates. Maximal degree in co-relation 30623. Up to 3642 conditions per place. [2024-06-21 15:59:02,466 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 382 selfloop transitions, 165 changer transitions 0/555 dead transitions. [2024-06-21 15:59:02,466 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 411 places, 555 transitions, 8719 flow [2024-06-21 15:59:02,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:59:02,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:59:02,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-21 15:59:02,467 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5914634146341463 [2024-06-21 15:59:02,467 INFO L175 Difference]: Start difference. First operand has 404 places, 525 transitions, 6851 flow. Second operand 8 states and 194 transitions. [2024-06-21 15:59:02,467 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 411 places, 555 transitions, 8719 flow [2024-06-21 15:59:04,625 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 408 places, 555 transitions, 8540 flow, removed 35 selfloop flow, removed 3 redundant places. [2024-06-21 15:59:04,631 INFO L231 Difference]: Finished difference. Result has 409 places, 534 transitions, 7162 flow [2024-06-21 15:59:04,631 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6672, PETRI_DIFFERENCE_MINUEND_PLACES=401, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=525, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=156, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=369, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7162, PETRI_PLACES=409, PETRI_TRANSITIONS=534} [2024-06-21 15:59:04,632 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 367 predicate places. [2024-06-21 15:59:04,632 INFO L495 AbstractCegarLoop]: Abstraction has has 409 places, 534 transitions, 7162 flow [2024-06-21 15:59:04,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 15:59:04,632 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:59:04,632 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:59:04,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-21 15:59:04,632 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:59:04,632 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:59:04,632 INFO L85 PathProgramCache]: Analyzing trace with hash 1576008320, now seen corresponding path program 10 times [2024-06-21 15:59:04,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:59:04,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270968656] [2024-06-21 15:59:04,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:59:04,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:59:04,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:59:04,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:59:04,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:59:04,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270968656] [2024-06-21 15:59:04,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270968656] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:59:04,740 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:59:04,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:59:04,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573565374] [2024-06-21 15:59:04,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:59:04,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:59:04,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:59:04,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:59:04,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:59:04,786 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:59:04,786 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 409 places, 534 transitions, 7162 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 15:59:04,786 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:59:04,786 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:59:04,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:59:05,552 INFO L124 PetriNetUnfolderBase]: 2548/4396 cut-off events. [2024-06-21 15:59:05,552 INFO L125 PetriNetUnfolderBase]: For 368403/368403 co-relation queries the response was YES. [2024-06-21 15:59:05,598 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30808 conditions, 4396 events. 2548/4396 cut-off events. For 368403/368403 co-relation queries the response was YES. Maximal size of possible extension queue 391. Compared 29378 event pairs, 453 based on Foata normal form. 1/4396 useless extension candidates. Maximal degree in co-relation 30644. Up to 3867 conditions per place. [2024-06-21 15:59:05,613 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 495 selfloop transitions, 49 changer transitions 0/552 dead transitions. [2024-06-21 15:59:05,613 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 416 places, 552 transitions, 8294 flow [2024-06-21 15:59:05,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:59:05,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:59:05,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 186 transitions. [2024-06-21 15:59:05,614 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5670731707317073 [2024-06-21 15:59:05,614 INFO L175 Difference]: Start difference. First operand has 409 places, 534 transitions, 7162 flow. Second operand 8 states and 186 transitions. [2024-06-21 15:59:05,614 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 416 places, 552 transitions, 8294 flow [2024-06-21 15:59:07,815 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 413 places, 552 transitions, 8022 flow, removed 41 selfloop flow, removed 3 redundant places. [2024-06-21 15:59:07,821 INFO L231 Difference]: Finished difference. Result has 414 places, 534 transitions, 6994 flow [2024-06-21 15:59:07,821 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6890, PETRI_DIFFERENCE_MINUEND_PLACES=406, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=534, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=485, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6994, PETRI_PLACES=414, PETRI_TRANSITIONS=534} [2024-06-21 15:59:07,822 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 372 predicate places. [2024-06-21 15:59:07,822 INFO L495 AbstractCegarLoop]: Abstraction has has 414 places, 534 transitions, 6994 flow [2024-06-21 15:59:07,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 15:59:07,822 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:59:07,822 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:59:07,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-21 15:59:07,823 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:59:07,823 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:59:07,823 INFO L85 PathProgramCache]: Analyzing trace with hash 1352868770, now seen corresponding path program 11 times [2024-06-21 15:59:07,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:59:07,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664559951] [2024-06-21 15:59:07,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:59:07,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:59:07,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:59:07,925 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:59:07,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:59:07,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664559951] [2024-06-21 15:59:07,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664559951] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:59:07,925 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:59:07,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:59:07,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186638867] [2024-06-21 15:59:07,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:59:07,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:59:07,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:59:07,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:59:07,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:59:07,966 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:59:07,966 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 414 places, 534 transitions, 6994 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 15:59:07,966 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:59:07,966 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:59:07,966 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:59:08,757 INFO L124 PetriNetUnfolderBase]: 2553/4402 cut-off events. [2024-06-21 15:59:08,757 INFO L125 PetriNetUnfolderBase]: For 375783/375785 co-relation queries the response was YES. [2024-06-21 15:59:08,806 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30630 conditions, 4402 events. 2553/4402 cut-off events. For 375783/375785 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 29486 event pairs, 460 based on Foata normal form. 3/4404 useless extension candidates. Maximal degree in co-relation 30465. Up to 3645 conditions per place. [2024-06-21 15:59:08,822 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 388 selfloop transitions, 162 changer transitions 0/558 dead transitions. [2024-06-21 15:59:08,822 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 421 places, 558 transitions, 8766 flow [2024-06-21 15:59:08,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:59:08,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:59:08,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 195 transitions. [2024-06-21 15:59:08,823 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5945121951219512 [2024-06-21 15:59:08,824 INFO L175 Difference]: Start difference. First operand has 414 places, 534 transitions, 6994 flow. Second operand 8 states and 195 transitions. [2024-06-21 15:59:08,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 421 places, 558 transitions, 8766 flow [2024-06-21 15:59:11,052 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 413 places, 558 transitions, 8642 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-21 15:59:11,058 INFO L231 Difference]: Finished difference. Result has 414 places, 537 transitions, 7240 flow [2024-06-21 15:59:11,058 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6870, PETRI_DIFFERENCE_MINUEND_PLACES=406, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=534, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=159, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=375, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7240, PETRI_PLACES=414, PETRI_TRANSITIONS=537} [2024-06-21 15:59:11,058 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 372 predicate places. [2024-06-21 15:59:11,058 INFO L495 AbstractCegarLoop]: Abstraction has has 414 places, 537 transitions, 7240 flow [2024-06-21 15:59:11,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 15:59:11,058 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:59:11,058 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:59:11,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-21 15:59:11,059 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:59:11,059 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:59:11,059 INFO L85 PathProgramCache]: Analyzing trace with hash 439462542, now seen corresponding path program 12 times [2024-06-21 15:59:11,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:59:11,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202126512] [2024-06-21 15:59:11,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:59:11,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:59:11,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:59:11,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:59:11,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:59:11,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202126512] [2024-06-21 15:59:11,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202126512] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:59:11,154 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:59:11,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:59:11,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432095585] [2024-06-21 15:59:11,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:59:11,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:59:11,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:59:11,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:59:11,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:59:11,186 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:59:11,186 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 414 places, 537 transitions, 7240 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 15:59:11,186 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:59:11,186 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:59:11,186 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:59:11,951 INFO L124 PetriNetUnfolderBase]: 2550/4398 cut-off events. [2024-06-21 15:59:11,951 INFO L125 PetriNetUnfolderBase]: For 379037/379039 co-relation queries the response was YES. [2024-06-21 15:59:12,000 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30836 conditions, 4398 events. 2550/4398 cut-off events. For 379037/379039 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 29443 event pairs, 460 based on Foata normal form. 3/4400 useless extension candidates. Maximal degree in co-relation 30670. Up to 3642 conditions per place. [2024-06-21 15:59:12,016 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 388 selfloop transitions, 161 changer transitions 0/557 dead transitions. [2024-06-21 15:59:12,016 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 421 places, 557 transitions, 8778 flow [2024-06-21 15:59:12,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:59:12,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:59:12,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-21 15:59:12,017 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5914634146341463 [2024-06-21 15:59:12,017 INFO L175 Difference]: Start difference. First operand has 414 places, 537 transitions, 7240 flow. Second operand 8 states and 194 transitions. [2024-06-21 15:59:12,017 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 421 places, 557 transitions, 8778 flow [2024-06-21 15:59:14,154 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 417 places, 557 transitions, 8482 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-21 15:59:14,160 INFO L231 Difference]: Finished difference. Result has 418 places, 537 transitions, 7272 flow [2024-06-21 15:59:14,160 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6944, PETRI_DIFFERENCE_MINUEND_PLACES=410, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=537, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=376, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7272, PETRI_PLACES=418, PETRI_TRANSITIONS=537} [2024-06-21 15:59:14,160 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 376 predicate places. [2024-06-21 15:59:14,160 INFO L495 AbstractCegarLoop]: Abstraction has has 418 places, 537 transitions, 7272 flow [2024-06-21 15:59:14,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 15:59:14,160 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:59:14,161 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:59:14,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-21 15:59:14,161 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:59:14,161 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:59:14,161 INFO L85 PathProgramCache]: Analyzing trace with hash 439462356, now seen corresponding path program 12 times [2024-06-21 15:59:14,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:59:14,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534589339] [2024-06-21 15:59:14,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:59:14,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:59:14,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:59:14,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:59:14,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:59:14,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534589339] [2024-06-21 15:59:14,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534589339] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:59:14,272 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:59:14,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:59:14,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779701118] [2024-06-21 15:59:14,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:59:14,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:59:14,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:59:14,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:59:14,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:59:14,315 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:59:14,316 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 418 places, 537 transitions, 7272 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 15:59:14,316 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:59:14,316 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:59:14,316 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:59:15,195 INFO L124 PetriNetUnfolderBase]: 2547/4394 cut-off events. [2024-06-21 15:59:15,195 INFO L125 PetriNetUnfolderBase]: For 381607/381609 co-relation queries the response was YES. [2024-06-21 15:59:15,237 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30767 conditions, 4394 events. 2547/4394 cut-off events. For 381607/381609 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 29398 event pairs, 456 based on Foata normal form. 3/4396 useless extension candidates. Maximal degree in co-relation 30600. Up to 3747 conditions per place. [2024-06-21 15:59:15,252 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 435 selfloop transitions, 116 changer transitions 0/559 dead transitions. [2024-06-21 15:59:15,252 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 428 places, 559 transitions, 8624 flow [2024-06-21 15:59:15,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 15:59:15,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 15:59:15,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 247 transitions. [2024-06-21 15:59:15,253 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5476718403547672 [2024-06-21 15:59:15,253 INFO L175 Difference]: Start difference. First operand has 418 places, 537 transitions, 7272 flow. Second operand 11 states and 247 transitions. [2024-06-21 15:59:15,253 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 428 places, 559 transitions, 8624 flow [2024-06-21 15:59:17,646 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 422 places, 559 transitions, 8278 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-21 15:59:17,652 INFO L231 Difference]: Finished difference. Result has 423 places, 537 transitions, 7164 flow [2024-06-21 15:59:17,653 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6926, PETRI_DIFFERENCE_MINUEND_PLACES=412, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=537, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=421, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7164, PETRI_PLACES=423, PETRI_TRANSITIONS=537} [2024-06-21 15:59:17,653 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 381 predicate places. [2024-06-21 15:59:17,653 INFO L495 AbstractCegarLoop]: Abstraction has has 423 places, 537 transitions, 7164 flow [2024-06-21 15:59:17,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 15:59:17,653 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:59:17,653 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:59:17,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-21 15:59:17,653 INFO L420 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:59:17,653 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:59:17,654 INFO L85 PathProgramCache]: Analyzing trace with hash -1899487324, now seen corresponding path program 1 times [2024-06-21 15:59:17,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:59:17,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115974042] [2024-06-21 15:59:17,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:59:17,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:59:17,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:59:17,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:59:17,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:59:17,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115974042] [2024-06-21 15:59:17,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115974042] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:59:17,759 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:59:17,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:59:17,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484561425] [2024-06-21 15:59:17,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:59:17,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:59:17,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:59:17,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:59:17,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:59:17,810 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:59:17,811 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 423 places, 537 transitions, 7164 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 15:59:17,811 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:59:17,811 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:59:17,811 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:59:18,624 INFO L124 PetriNetUnfolderBase]: 2635/4549 cut-off events. [2024-06-21 15:59:18,625 INFO L125 PetriNetUnfolderBase]: For 413395/413395 co-relation queries the response was YES. [2024-06-21 15:59:18,673 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31472 conditions, 4549 events. 2635/4549 cut-off events. For 413395/413395 co-relation queries the response was YES. Maximal size of possible extension queue 402. Compared 30576 event pairs, 400 based on Foata normal form. 6/4554 useless extension candidates. Maximal degree in co-relation 31304. Up to 3796 conditions per place. [2024-06-21 15:59:18,689 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 515 selfloop transitions, 56 changer transitions 0/579 dead transitions. [2024-06-21 15:59:18,690 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 430 places, 579 transitions, 8715 flow [2024-06-21 15:59:18,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:59:18,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:59:18,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 200 transitions. [2024-06-21 15:59:18,690 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-21 15:59:18,691 INFO L175 Difference]: Start difference. First operand has 423 places, 537 transitions, 7164 flow. Second operand 8 states and 200 transitions. [2024-06-21 15:59:18,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 430 places, 579 transitions, 8715 flow [2024-06-21 15:59:21,053 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 419 places, 579 transitions, 8449 flow, removed 0 selfloop flow, removed 11 redundant places. [2024-06-21 15:59:21,059 INFO L231 Difference]: Finished difference. Result has 422 places, 543 transitions, 7117 flow [2024-06-21 15:59:21,059 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6898, PETRI_DIFFERENCE_MINUEND_PLACES=412, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=537, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=483, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7117, PETRI_PLACES=422, PETRI_TRANSITIONS=543} [2024-06-21 15:59:21,060 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 380 predicate places. [2024-06-21 15:59:21,060 INFO L495 AbstractCegarLoop]: Abstraction has has 422 places, 543 transitions, 7117 flow [2024-06-21 15:59:21,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 15:59:21,060 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:59:21,060 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:59:21,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-21 15:59:21,060 INFO L420 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:59:21,060 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:59:21,060 INFO L85 PathProgramCache]: Analyzing trace with hash -1633790044, now seen corresponding path program 2 times [2024-06-21 15:59:21,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:59:21,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168514378] [2024-06-21 15:59:21,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:59:21,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:59:21,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:59:21,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:59:21,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:59:21,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168514378] [2024-06-21 15:59:21,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168514378] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:59:21,179 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:59:21,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:59:21,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816475462] [2024-06-21 15:59:21,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:59:21,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:59:21,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:59:21,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:59:21,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:59:21,229 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:59:21,229 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 422 places, 543 transitions, 7117 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 15:59:21,229 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:59:21,229 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:59:21,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:59:22,174 INFO L124 PetriNetUnfolderBase]: 2691/4637 cut-off events. [2024-06-21 15:59:22,174 INFO L125 PetriNetUnfolderBase]: For 422527/422527 co-relation queries the response was YES. [2024-06-21 15:59:22,218 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32183 conditions, 4637 events. 2691/4637 cut-off events. For 422527/422527 co-relation queries the response was YES. Maximal size of possible extension queue 407. Compared 31216 event pairs, 477 based on Foata normal form. 6/4642 useless extension candidates. Maximal degree in co-relation 32012. Up to 4035 conditions per place. [2024-06-21 15:59:22,232 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 519 selfloop transitions, 51 changer transitions 0/578 dead transitions. [2024-06-21 15:59:22,232 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 429 places, 578 transitions, 8441 flow [2024-06-21 15:59:22,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:59:22,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:59:22,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-21 15:59:22,233 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5975609756097561 [2024-06-21 15:59:22,233 INFO L175 Difference]: Start difference. First operand has 422 places, 543 transitions, 7117 flow. Second operand 8 states and 196 transitions. [2024-06-21 15:59:22,233 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 429 places, 578 transitions, 8441 flow [2024-06-21 15:59:24,446 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 424 places, 578 transitions, 8322 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-21 15:59:24,453 INFO L231 Difference]: Finished difference. Result has 426 places, 547 transitions, 7176 flow [2024-06-21 15:59:24,453 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7001, PETRI_DIFFERENCE_MINUEND_PLACES=417, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=543, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=492, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7176, PETRI_PLACES=426, PETRI_TRANSITIONS=547} [2024-06-21 15:59:24,453 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 384 predicate places. [2024-06-21 15:59:24,453 INFO L495 AbstractCegarLoop]: Abstraction has has 426 places, 547 transitions, 7176 flow [2024-06-21 15:59:24,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 15:59:24,453 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:59:24,453 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:59:24,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-21 15:59:24,454 INFO L420 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:59:24,454 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:59:24,454 INFO L85 PathProgramCache]: Analyzing trace with hash 1204780964, now seen corresponding path program 3 times [2024-06-21 15:59:24,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:59:24,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513640404] [2024-06-21 15:59:24,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:59:24,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:59:24,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:59:24,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:59:24,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:59:24,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513640404] [2024-06-21 15:59:24,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513640404] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:59:24,559 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:59:24,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:59:24,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565429035] [2024-06-21 15:59:24,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:59:24,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:59:24,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:59:24,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:59:24,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:59:24,607 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:59:24,607 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 426 places, 547 transitions, 7176 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 15:59:24,607 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:59:24,607 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:59:24,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:59:25,431 INFO L124 PetriNetUnfolderBase]: 2719/4685 cut-off events. [2024-06-21 15:59:25,431 INFO L125 PetriNetUnfolderBase]: For 431089/431089 co-relation queries the response was YES. [2024-06-21 15:59:25,484 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32420 conditions, 4685 events. 2719/4685 cut-off events. For 431089/431089 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 31650 event pairs, 483 based on Foata normal form. 6/4690 useless extension candidates. Maximal degree in co-relation 32248. Up to 4075 conditions per place. [2024-06-21 15:59:25,501 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 519 selfloop transitions, 48 changer transitions 0/575 dead transitions. [2024-06-21 15:59:25,501 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 433 places, 575 transitions, 8467 flow [2024-06-21 15:59:25,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:59:25,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:59:25,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-21 15:59:25,502 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5823170731707317 [2024-06-21 15:59:25,502 INFO L175 Difference]: Start difference. First operand has 426 places, 547 transitions, 7176 flow. Second operand 8 states and 191 transitions. [2024-06-21 15:59:25,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 433 places, 575 transitions, 8467 flow [2024-06-21 15:59:27,875 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 428 places, 575 transitions, 8357 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-21 15:59:27,881 INFO L231 Difference]: Finished difference. Result has 430 places, 550 transitions, 7227 flow [2024-06-21 15:59:27,882 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7066, PETRI_DIFFERENCE_MINUEND_PLACES=421, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=547, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=499, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7227, PETRI_PLACES=430, PETRI_TRANSITIONS=550} [2024-06-21 15:59:27,882 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 388 predicate places. [2024-06-21 15:59:27,882 INFO L495 AbstractCegarLoop]: Abstraction has has 430 places, 550 transitions, 7227 flow [2024-06-21 15:59:27,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 15:59:27,882 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:59:27,882 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:59:27,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-21 15:59:27,882 INFO L420 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:59:27,882 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:59:27,883 INFO L85 PathProgramCache]: Analyzing trace with hash -1485116346, now seen corresponding path program 1 times [2024-06-21 15:59:27,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:59:27,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900067254] [2024-06-21 15:59:27,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:59:27,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:59:27,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:59:27,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:59:27,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:59:27,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900067254] [2024-06-21 15:59:27,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900067254] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:59:27,991 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:59:27,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:59:27,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938218366] [2024-06-21 15:59:27,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:59:27,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:59:27,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:59:27,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:59:27,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:59:28,032 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:59:28,032 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 430 places, 550 transitions, 7227 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 15:59:28,032 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:59:28,032 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:59:28,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:59:29,035 INFO L124 PetriNetUnfolderBase]: 2740/4713 cut-off events. [2024-06-21 15:59:29,035 INFO L125 PetriNetUnfolderBase]: For 430580/430580 co-relation queries the response was YES. [2024-06-21 15:59:29,081 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32927 conditions, 4713 events. 2740/4713 cut-off events. For 430580/430580 co-relation queries the response was YES. Maximal size of possible extension queue 416. Compared 31765 event pairs, 495 based on Foata normal form. 2/4711 useless extension candidates. Maximal degree in co-relation 32753. Up to 4052 conditions per place. [2024-06-21 15:59:29,096 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 482 selfloop transitions, 94 changer transitions 0/584 dead transitions. [2024-06-21 15:59:29,096 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 584 transitions, 8743 flow [2024-06-21 15:59:29,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:59:29,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:59:29,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-06-21 15:59:29,097 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6036585365853658 [2024-06-21 15:59:29,097 INFO L175 Difference]: Start difference. First operand has 430 places, 550 transitions, 7227 flow. Second operand 8 states and 198 transitions. [2024-06-21 15:59:29,097 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 584 transitions, 8743 flow [2024-06-21 15:59:31,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 433 places, 584 transitions, 8645 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-21 15:59:31,611 INFO L231 Difference]: Finished difference. Result has 434 places, 554 transitions, 7410 flow [2024-06-21 15:59:31,612 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7129, PETRI_DIFFERENCE_MINUEND_PLACES=426, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=550, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=458, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7410, PETRI_PLACES=434, PETRI_TRANSITIONS=554} [2024-06-21 15:59:31,612 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 392 predicate places. [2024-06-21 15:59:31,612 INFO L495 AbstractCegarLoop]: Abstraction has has 434 places, 554 transitions, 7410 flow [2024-06-21 15:59:31,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 15:59:31,613 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:59:31,613 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:59:31,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-21 15:59:31,613 INFO L420 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:59:31,614 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:59:31,614 INFO L85 PathProgramCache]: Analyzing trace with hash 1899687632, now seen corresponding path program 2 times [2024-06-21 15:59:31,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:59:31,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155674286] [2024-06-21 15:59:31,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:59:31,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:59:31,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:59:31,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:59:31,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:59:31,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155674286] [2024-06-21 15:59:31,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155674286] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:59:31,737 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:59:31,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:59:31,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490601748] [2024-06-21 15:59:31,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:59:31,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:59:31,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:59:31,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:59:31,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:59:31,771 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:59:31,771 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 434 places, 554 transitions, 7410 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 15:59:31,772 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:59:31,772 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:59:31,772 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:59:32,632 INFO L124 PetriNetUnfolderBase]: 2748/4724 cut-off events. [2024-06-21 15:59:32,633 INFO L125 PetriNetUnfolderBase]: For 437950/437950 co-relation queries the response was YES. [2024-06-21 15:59:32,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33231 conditions, 4724 events. 2748/4724 cut-off events. For 437950/437950 co-relation queries the response was YES. Maximal size of possible extension queue 415. Compared 31857 event pairs, 500 based on Foata normal form. 2/4724 useless extension candidates. Maximal degree in co-relation 33056. Up to 4099 conditions per place. [2024-06-21 15:59:32,706 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 482 selfloop transitions, 91 changer transitions 0/581 dead transitions. [2024-06-21 15:59:32,706 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 441 places, 581 transitions, 8664 flow [2024-06-21 15:59:32,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:59:32,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:59:32,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 193 transitions. [2024-06-21 15:59:32,707 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5884146341463414 [2024-06-21 15:59:32,707 INFO L175 Difference]: Start difference. First operand has 434 places, 554 transitions, 7410 flow. Second operand 8 states and 193 transitions. [2024-06-21 15:59:32,707 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 441 places, 581 transitions, 8664 flow [2024-06-21 15:59:35,904 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 437 places, 581 transitions, 8478 flow, removed 41 selfloop flow, removed 4 redundant places. [2024-06-21 15:59:35,912 INFO L231 Difference]: Finished difference. Result has 438 places, 556 transitions, 7461 flow [2024-06-21 15:59:35,912 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7246, PETRI_DIFFERENCE_MINUEND_PLACES=430, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=554, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=463, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7461, PETRI_PLACES=438, PETRI_TRANSITIONS=556} [2024-06-21 15:59:35,912 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 396 predicate places. [2024-06-21 15:59:35,913 INFO L495 AbstractCegarLoop]: Abstraction has has 438 places, 556 transitions, 7461 flow [2024-06-21 15:59:35,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 15:59:35,913 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:59:35,913 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:59:35,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-21 15:59:35,913 INFO L420 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:59:35,914 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:59:35,914 INFO L85 PathProgramCache]: Analyzing trace with hash -554256378, now seen corresponding path program 3 times [2024-06-21 15:59:35,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:59:35,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831966053] [2024-06-21 15:59:35,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:59:35,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:59:35,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:59:36,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:59:36,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:59:36,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831966053] [2024-06-21 15:59:36,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831966053] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:59:36,062 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:59:36,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:59:36,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470736844] [2024-06-21 15:59:36,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:59:36,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:59:36,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:59:36,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:59:36,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:59:36,106 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:59:36,106 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 438 places, 556 transitions, 7461 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 15:59:36,106 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:59:36,106 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:59:36,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:59:37,077 INFO L124 PetriNetUnfolderBase]: 2756/4745 cut-off events. [2024-06-21 15:59:37,078 INFO L125 PetriNetUnfolderBase]: For 445899/445901 co-relation queries the response was YES. [2024-06-21 15:59:37,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33405 conditions, 4745 events. 2756/4745 cut-off events. For 445899/445901 co-relation queries the response was YES. Maximal size of possible extension queue 418. Compared 32078 event pairs, 497 based on Foata normal form. 4/4748 useless extension candidates. Maximal degree in co-relation 33228. Up to 4189 conditions per place. [2024-06-21 15:59:37,141 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 524 selfloop transitions, 48 changer transitions 0/580 dead transitions. [2024-06-21 15:59:37,141 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 445 places, 580 transitions, 8687 flow [2024-06-21 15:59:37,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:59:37,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:59:37,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 187 transitions. [2024-06-21 15:59:37,142 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5701219512195121 [2024-06-21 15:59:37,142 INFO L175 Difference]: Start difference. First operand has 438 places, 556 transitions, 7461 flow. Second operand 8 states and 187 transitions. [2024-06-21 15:59:37,142 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 445 places, 580 transitions, 8687 flow [2024-06-21 15:59:39,641 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 439 places, 580 transitions, 8492 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-21 15:59:39,647 INFO L231 Difference]: Finished difference. Result has 440 places, 558 transitions, 7399 flow [2024-06-21 15:59:39,647 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7266, PETRI_DIFFERENCE_MINUEND_PLACES=432, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=556, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=508, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7399, PETRI_PLACES=440, PETRI_TRANSITIONS=558} [2024-06-21 15:59:39,647 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 398 predicate places. [2024-06-21 15:59:39,648 INFO L495 AbstractCegarLoop]: Abstraction has has 440 places, 558 transitions, 7399 flow [2024-06-21 15:59:39,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 15:59:39,648 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:59:39,648 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:59:39,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-21 15:59:39,648 INFO L420 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:59:39,648 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:59:39,648 INFO L85 PathProgramCache]: Analyzing trace with hash -554071680, now seen corresponding path program 1 times [2024-06-21 15:59:39,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:59:39,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905952978] [2024-06-21 15:59:39,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:59:39,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:59:39,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:59:39,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:59:39,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:59:39,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905952978] [2024-06-21 15:59:39,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905952978] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:59:39,756 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:59:39,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:59:39,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275144083] [2024-06-21 15:59:39,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:59:39,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:59:39,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:59:39,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:59:39,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:59:39,799 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:59:39,799 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 440 places, 558 transitions, 7399 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 15:59:39,799 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:59:39,800 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:59:39,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:59:40,633 INFO L124 PetriNetUnfolderBase]: 2764/4753 cut-off events. [2024-06-21 15:59:40,633 INFO L125 PetriNetUnfolderBase]: For 453629/453631 co-relation queries the response was YES. [2024-06-21 15:59:40,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33472 conditions, 4753 events. 2764/4753 cut-off events. For 453629/453631 co-relation queries the response was YES. Maximal size of possible extension queue 418. Compared 32073 event pairs, 499 based on Foata normal form. 4/4756 useless extension candidates. Maximal degree in co-relation 33294. Up to 4147 conditions per place. [2024-06-21 15:59:40,702 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 483 selfloop transitions, 91 changer transitions 0/582 dead transitions. [2024-06-21 15:59:40,703 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 447 places, 582 transitions, 8649 flow [2024-06-21 15:59:40,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:59:40,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:59:40,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 190 transitions. [2024-06-21 15:59:40,703 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5792682926829268 [2024-06-21 15:59:40,703 INFO L175 Difference]: Start difference. First operand has 440 places, 558 transitions, 7399 flow. Second operand 8 states and 190 transitions. [2024-06-21 15:59:40,704 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 447 places, 582 transitions, 8649 flow [2024-06-21 15:59:43,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 441 places, 582 transitions, 8536 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-21 15:59:43,033 INFO L231 Difference]: Finished difference. Result has 442 places, 560 transitions, 7525 flow [2024-06-21 15:59:43,033 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7286, PETRI_DIFFERENCE_MINUEND_PLACES=434, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=558, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=467, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7525, PETRI_PLACES=442, PETRI_TRANSITIONS=560} [2024-06-21 15:59:43,033 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 400 predicate places. [2024-06-21 15:59:43,033 INFO L495 AbstractCegarLoop]: Abstraction has has 442 places, 560 transitions, 7525 flow [2024-06-21 15:59:43,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 15:59:43,033 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:59:43,034 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:59:43,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-21 15:59:43,034 INFO L420 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:59:43,034 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:59:43,034 INFO L85 PathProgramCache]: Analyzing trace with hash 1352697960, now seen corresponding path program 4 times [2024-06-21 15:59:43,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:59:43,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330807249] [2024-06-21 15:59:43,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:59:43,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:59:43,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:59:43,145 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:59:43,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:59:43,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330807249] [2024-06-21 15:59:43,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330807249] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:59:43,145 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:59:43,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:59:43,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82626996] [2024-06-21 15:59:43,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:59:43,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:59:43,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:59:43,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:59:43,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:59:43,187 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:59:43,187 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 442 places, 560 transitions, 7525 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 15:59:43,187 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:59:43,188 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:59:43,188 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:59:44,121 INFO L124 PetriNetUnfolderBase]: 2772/4765 cut-off events. [2024-06-21 15:59:44,121 INFO L125 PetriNetUnfolderBase]: For 462481/462483 co-relation queries the response was YES. [2024-06-21 15:59:44,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33763 conditions, 4765 events. 2772/4765 cut-off events. For 462481/462483 co-relation queries the response was YES. Maximal size of possible extension queue 419. Compared 32178 event pairs, 495 based on Foata normal form. 4/4768 useless extension candidates. Maximal degree in co-relation 33584. Up to 4207 conditions per place. [2024-06-21 15:59:44,185 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 520 selfloop transitions, 54 changer transitions 0/582 dead transitions. [2024-06-21 15:59:44,185 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 450 places, 582 transitions, 8753 flow [2024-06-21 15:59:44,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 15:59:44,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 15:59:44,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 203 transitions. [2024-06-21 15:59:44,186 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5501355013550135 [2024-06-21 15:59:44,186 INFO L175 Difference]: Start difference. First operand has 442 places, 560 transitions, 7525 flow. Second operand 9 states and 203 transitions. [2024-06-21 15:59:44,186 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 450 places, 582 transitions, 8753 flow [2024-06-21 15:59:46,568 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 444 places, 582 transitions, 8530 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-21 15:59:46,574 INFO L231 Difference]: Finished difference. Result has 445 places, 562 transitions, 7451 flow [2024-06-21 15:59:46,574 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7302, PETRI_DIFFERENCE_MINUEND_PLACES=436, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=560, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=506, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7451, PETRI_PLACES=445, PETRI_TRANSITIONS=562} [2024-06-21 15:59:46,575 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 403 predicate places. [2024-06-21 15:59:46,575 INFO L495 AbstractCegarLoop]: Abstraction has has 445 places, 562 transitions, 7451 flow [2024-06-21 15:59:46,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 15:59:46,575 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:59:46,575 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:59:46,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-21 15:59:46,575 INFO L420 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:59:46,575 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:59:46,575 INFO L85 PathProgramCache]: Analyzing trace with hash -2114164662, now seen corresponding path program 2 times [2024-06-21 15:59:46,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:59:46,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014526596] [2024-06-21 15:59:46,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:59:46,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:59:46,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:59:46,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:59:46,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:59:46,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014526596] [2024-06-21 15:59:46,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014526596] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:59:46,683 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:59:46,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:59:46,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758473553] [2024-06-21 15:59:46,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:59:46,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:59:46,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:59:46,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:59:46,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:59:46,722 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:59:46,723 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 445 places, 562 transitions, 7451 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 15:59:46,723 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:59:46,723 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:59:46,723 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:59:47,570 INFO L124 PetriNetUnfolderBase]: 2780/4781 cut-off events. [2024-06-21 15:59:47,570 INFO L125 PetriNetUnfolderBase]: For 470226/470228 co-relation queries the response was YES. [2024-06-21 15:59:47,623 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33817 conditions, 4781 events. 2780/4781 cut-off events. For 470226/470228 co-relation queries the response was YES. Maximal size of possible extension queue 421. Compared 32293 event pairs, 501 based on Foata normal form. 4/4784 useless extension candidates. Maximal degree in co-relation 33637. Up to 4171 conditions per place. [2024-06-21 15:59:47,640 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 486 selfloop transitions, 89 changer transitions 0/583 dead transitions. [2024-06-21 15:59:47,640 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 452 places, 583 transitions, 8699 flow [2024-06-21 15:59:47,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:59:47,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:59:47,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 188 transitions. [2024-06-21 15:59:47,641 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.573170731707317 [2024-06-21 15:59:47,641 INFO L175 Difference]: Start difference. First operand has 445 places, 562 transitions, 7451 flow. Second operand 8 states and 188 transitions. [2024-06-21 15:59:47,641 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 452 places, 583 transitions, 8699 flow [2024-06-21 15:59:49,887 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 445 places, 583 transitions, 8570 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-21 15:59:49,893 INFO L231 Difference]: Finished difference. Result has 446 places, 564 transitions, 7561 flow [2024-06-21 15:59:49,893 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7322, PETRI_DIFFERENCE_MINUEND_PLACES=438, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=562, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=473, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7561, PETRI_PLACES=446, PETRI_TRANSITIONS=564} [2024-06-21 15:59:49,893 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 404 predicate places. [2024-06-21 15:59:49,894 INFO L495 AbstractCegarLoop]: Abstraction has has 446 places, 564 transitions, 7561 flow [2024-06-21 15:59:49,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 15:59:49,894 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:59:49,894 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:59:49,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-21 15:59:49,894 INFO L420 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:59:49,894 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:59:49,894 INFO L85 PathProgramCache]: Analyzing trace with hash 1580783808, now seen corresponding path program 3 times [2024-06-21 15:59:49,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:59:49,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786822230] [2024-06-21 15:59:49,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:59:49,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:59:49,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:59:50,016 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:59:50,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:59:50,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786822230] [2024-06-21 15:59:50,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786822230] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:59:50,017 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:59:50,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:59:50,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169882471] [2024-06-21 15:59:50,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:59:50,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:59:50,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:59:50,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:59:50,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:59:50,060 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:59:50,061 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 446 places, 564 transitions, 7561 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 15:59:50,061 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:59:50,061 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:59:50,061 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:59:50,962 INFO L124 PetriNetUnfolderBase]: 2788/4793 cut-off events. [2024-06-21 15:59:50,962 INFO L125 PetriNetUnfolderBase]: For 479300/479302 co-relation queries the response was YES. [2024-06-21 15:59:51,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34132 conditions, 4793 events. 2788/4793 cut-off events. For 479300/479302 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 32380 event pairs, 503 based on Foata normal form. 4/4796 useless extension candidates. Maximal degree in co-relation 33951. Up to 4183 conditions per place. [2024-06-21 15:59:51,031 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 486 selfloop transitions, 91 changer transitions 0/585 dead transitions. [2024-06-21 15:59:51,031 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 453 places, 585 transitions, 8817 flow [2024-06-21 15:59:51,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:59:51,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:59:51,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 187 transitions. [2024-06-21 15:59:51,032 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5701219512195121 [2024-06-21 15:59:51,032 INFO L175 Difference]: Start difference. First operand has 446 places, 564 transitions, 7561 flow. Second operand 8 states and 187 transitions. [2024-06-21 15:59:51,032 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 453 places, 585 transitions, 8817 flow [2024-06-21 15:59:53,494 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 448 places, 585 transitions, 8612 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-21 15:59:53,500 INFO L231 Difference]: Finished difference. Result has 449 places, 566 transitions, 7603 flow [2024-06-21 15:59:53,501 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7356, PETRI_DIFFERENCE_MINUEND_PLACES=441, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=564, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=473, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7603, PETRI_PLACES=449, PETRI_TRANSITIONS=566} [2024-06-21 15:59:53,501 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 407 predicate places. [2024-06-21 15:59:53,501 INFO L495 AbstractCegarLoop]: Abstraction has has 449 places, 566 transitions, 7603 flow [2024-06-21 15:59:53,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 15:59:53,501 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:59:53,501 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:59:53,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-06-21 15:59:53,501 INFO L420 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:59:53,501 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:59:53,502 INFO L85 PathProgramCache]: Analyzing trace with hash 1589354688, now seen corresponding path program 4 times [2024-06-21 15:59:53,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:59:53,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784161976] [2024-06-21 15:59:53,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:59:53,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:59:53,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:59:53,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:59:53,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:59:53,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784161976] [2024-06-21 15:59:53,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784161976] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:59:53,621 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:59:53,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:59:53,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407127537] [2024-06-21 15:59:53,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:59:53,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:59:53,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:59:53,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:59:53,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:59:53,681 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:59:53,681 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 449 places, 566 transitions, 7603 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 15:59:53,681 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:59:53,681 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:59:53,681 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:59:54,572 INFO L124 PetriNetUnfolderBase]: 2809/4822 cut-off events. [2024-06-21 15:59:54,572 INFO L125 PetriNetUnfolderBase]: For 501333/501335 co-relation queries the response was YES. [2024-06-21 15:59:54,628 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34771 conditions, 4822 events. 2809/4822 cut-off events. For 501333/501335 co-relation queries the response was YES. Maximal size of possible extension queue 427. Compared 32552 event pairs, 500 based on Foata normal form. 4/4825 useless extension candidates. Maximal degree in co-relation 34589. Up to 4179 conditions per place. [2024-06-21 15:59:54,645 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 485 selfloop transitions, 99 changer transitions 0/592 dead transitions. [2024-06-21 15:59:54,645 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 456 places, 592 transitions, 9175 flow [2024-06-21 15:59:54,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:59:54,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:59:54,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 189 transitions. [2024-06-21 15:59:54,646 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5762195121951219 [2024-06-21 15:59:54,646 INFO L175 Difference]: Start difference. First operand has 449 places, 566 transitions, 7603 flow. Second operand 8 states and 189 transitions. [2024-06-21 15:59:54,646 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 456 places, 592 transitions, 9175 flow [2024-06-21 15:59:57,257 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 450 places, 592 transitions, 8944 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-21 15:59:57,265 INFO L231 Difference]: Finished difference. Result has 452 places, 571 transitions, 7729 flow [2024-06-21 15:59:57,266 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7372, PETRI_DIFFERENCE_MINUEND_PLACES=443, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=566, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=469, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7729, PETRI_PLACES=452, PETRI_TRANSITIONS=571} [2024-06-21 15:59:57,266 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 410 predicate places. [2024-06-21 15:59:57,266 INFO L495 AbstractCegarLoop]: Abstraction has has 452 places, 571 transitions, 7729 flow [2024-06-21 15:59:57,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 15:59:57,266 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:59:57,267 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:59:57,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-06-21 15:59:57,267 INFO L420 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:59:57,267 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:59:57,267 INFO L85 PathProgramCache]: Analyzing trace with hash 278826242, now seen corresponding path program 13 times [2024-06-21 15:59:57,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:59:57,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319569111] [2024-06-21 15:59:57,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:59:57,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:59:57,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:59:57,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:59:57,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:59:57,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319569111] [2024-06-21 15:59:57,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319569111] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:59:57,385 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:59:57,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:59:57,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641231446] [2024-06-21 15:59:57,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:59:57,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:59:57,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:59:57,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:59:57,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:59:57,429 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:59:57,430 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 452 places, 571 transitions, 7729 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 15:59:57,430 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:59:57,430 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:59:57,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:59:58,337 INFO L124 PetriNetUnfolderBase]: 2838/4857 cut-off events. [2024-06-21 15:59:58,337 INFO L125 PetriNetUnfolderBase]: For 524456/524456 co-relation queries the response was YES. [2024-06-21 15:59:58,393 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35640 conditions, 4857 events. 2838/4857 cut-off events. For 524456/524456 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 32792 event pairs, 513 based on Foata normal form. 1/4855 useless extension candidates. Maximal degree in co-relation 35456. Up to 4012 conditions per place. [2024-06-21 15:59:58,409 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 423 selfloop transitions, 180 changer transitions 0/611 dead transitions. [2024-06-21 15:59:58,409 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 459 places, 611 transitions, 10137 flow [2024-06-21 15:59:58,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:59:58,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:59:58,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-06-21 15:59:58,410 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6158536585365854 [2024-06-21 15:59:58,410 INFO L175 Difference]: Start difference. First operand has 452 places, 571 transitions, 7729 flow. Second operand 8 states and 202 transitions. [2024-06-21 15:59:58,410 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 459 places, 611 transitions, 10137 flow [2024-06-21 16:00:01,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 455 places, 611 transitions, 9949 flow, removed 42 selfloop flow, removed 4 redundant places. [2024-06-21 16:00:01,771 INFO L231 Difference]: Finished difference. Result has 456 places, 583 transitions, 8153 flow [2024-06-21 16:00:01,771 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7541, PETRI_DIFFERENCE_MINUEND_PLACES=448, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=571, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=168, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=403, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8153, PETRI_PLACES=456, PETRI_TRANSITIONS=583} [2024-06-21 16:00:01,771 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 414 predicate places. [2024-06-21 16:00:01,771 INFO L495 AbstractCegarLoop]: Abstraction has has 456 places, 583 transitions, 8153 flow [2024-06-21 16:00:01,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 16:00:01,771 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:00:01,772 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:00:01,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2024-06-21 16:00:01,772 INFO L420 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:00:01,772 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:00:01,772 INFO L85 PathProgramCache]: Analyzing trace with hash -1147900640, now seen corresponding path program 14 times [2024-06-21 16:00:01,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:00:01,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619200380] [2024-06-21 16:00:01,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:00:01,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:00:01,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:00:01,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:00:01,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:00:01,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619200380] [2024-06-21 16:00:01,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619200380] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:00:01,868 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:00:01,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:00:01,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655923926] [2024-06-21 16:00:01,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:00:01,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:00:01,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:00:01,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:00:01,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:00:01,912 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 16:00:01,912 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 456 places, 583 transitions, 8153 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 16:00:01,912 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:00:01,912 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 16:00:01,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:00:02,821 INFO L124 PetriNetUnfolderBase]: 2843/4866 cut-off events. [2024-06-21 16:00:02,821 INFO L125 PetriNetUnfolderBase]: For 532866/532866 co-relation queries the response was YES. [2024-06-21 16:00:02,877 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36019 conditions, 4866 events. 2843/4866 cut-off events. For 532866/532866 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 32915 event pairs, 513 based on Foata normal form. 1/4864 useless extension candidates. Maximal degree in co-relation 35833. Up to 4018 conditions per place. [2024-06-21 16:00:02,895 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 407 selfloop transitions, 197 changer transitions 0/612 dead transitions. [2024-06-21 16:00:02,895 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 463 places, 612 transitions, 9945 flow [2024-06-21 16:00:02,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:00:02,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:00:02,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-06-21 16:00:02,896 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6036585365853658 [2024-06-21 16:00:02,896 INFO L175 Difference]: Start difference. First operand has 456 places, 583 transitions, 8153 flow. Second operand 8 states and 198 transitions. [2024-06-21 16:00:02,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 463 places, 612 transitions, 9945 flow [2024-06-21 16:00:06,249 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 459 places, 612 transitions, 9435 flow, removed 76 selfloop flow, removed 4 redundant places. [2024-06-21 16:00:06,256 INFO L231 Difference]: Finished difference. Result has 460 places, 586 transitions, 8115 flow [2024-06-21 16:00:06,257 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7667, PETRI_DIFFERENCE_MINUEND_PLACES=452, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=583, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=194, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=389, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8115, PETRI_PLACES=460, PETRI_TRANSITIONS=586} [2024-06-21 16:00:06,257 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 418 predicate places. [2024-06-21 16:00:06,257 INFO L495 AbstractCegarLoop]: Abstraction has has 460 places, 586 transitions, 8115 flow [2024-06-21 16:00:06,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 16:00:06,258 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:00:06,258 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:00:06,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2024-06-21 16:00:06,258 INFO L420 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:00:06,258 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:00:06,258 INFO L85 PathProgramCache]: Analyzing trace with hash 2121351396, now seen corresponding path program 15 times [2024-06-21 16:00:06,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:00:06,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820805347] [2024-06-21 16:00:06,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:00:06,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:00:06,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:00:06,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:00:06,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:00:06,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820805347] [2024-06-21 16:00:06,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820805347] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:00:06,382 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:00:06,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:00:06,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125594939] [2024-06-21 16:00:06,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:00:06,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:00:06,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:00:06,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:00:06,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:00:06,426 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 16:00:06,427 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 460 places, 586 transitions, 8115 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 16:00:06,427 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:00:06,427 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 16:00:06,427 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:00:07,399 INFO L124 PetriNetUnfolderBase]: 2848/4875 cut-off events. [2024-06-21 16:00:07,399 INFO L125 PetriNetUnfolderBase]: For 540020/540020 co-relation queries the response was YES. [2024-06-21 16:00:07,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36037 conditions, 4875 events. 2848/4875 cut-off events. For 540020/540020 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 32979 event pairs, 513 based on Foata normal form. 1/4873 useless extension candidates. Maximal degree in co-relation 35850. Up to 4024 conditions per place. [2024-06-21 16:00:07,475 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 407 selfloop transitions, 197 changer transitions 0/612 dead transitions. [2024-06-21 16:00:07,476 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 467 places, 612 transitions, 9885 flow [2024-06-21 16:00:07,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:00:07,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:00:07,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-21 16:00:07,476 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5975609756097561 [2024-06-21 16:00:07,476 INFO L175 Difference]: Start difference. First operand has 460 places, 586 transitions, 8115 flow. Second operand 8 states and 196 transitions. [2024-06-21 16:00:07,476 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 467 places, 612 transitions, 9885 flow [2024-06-21 16:00:10,389 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 461 places, 612 transitions, 9391 flow, removed 35 selfloop flow, removed 6 redundant places. [2024-06-21 16:00:10,396 INFO L231 Difference]: Finished difference. Result has 462 places, 589 transitions, 8075 flow [2024-06-21 16:00:10,396 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7641, PETRI_DIFFERENCE_MINUEND_PLACES=454, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=586, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=194, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=392, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8075, PETRI_PLACES=462, PETRI_TRANSITIONS=589} [2024-06-21 16:00:10,396 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 420 predicate places. [2024-06-21 16:00:10,396 INFO L495 AbstractCegarLoop]: Abstraction has has 462 places, 589 transitions, 8075 flow [2024-06-21 16:00:10,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 16:00:10,396 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:00:10,397 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:00:10,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2024-06-21 16:00:10,397 INFO L420 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:00:10,397 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:00:10,397 INFO L85 PathProgramCache]: Analyzing trace with hash 427320168, now seen corresponding path program 16 times [2024-06-21 16:00:10,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:00:10,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929908156] [2024-06-21 16:00:10,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:00:10,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:00:10,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:00:10,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:00:10,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:00:10,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929908156] [2024-06-21 16:00:10,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929908156] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:00:10,491 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:00:10,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:00:10,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135597369] [2024-06-21 16:00:10,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:00:10,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:00:10,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:00:10,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:00:10,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:00:10,526 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 16:00:10,527 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 462 places, 589 transitions, 8075 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 16:00:10,527 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:00:10,527 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 16:00:10,527 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:00:11,449 INFO L124 PetriNetUnfolderBase]: 2861/4893 cut-off events. [2024-06-21 16:00:11,449 INFO L125 PetriNetUnfolderBase]: For 552538/552538 co-relation queries the response was YES. [2024-06-21 16:00:11,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36000 conditions, 4893 events. 2861/4893 cut-off events. For 552538/552538 co-relation queries the response was YES. Maximal size of possible extension queue 439. Compared 33059 event pairs, 511 based on Foata normal form. 1/4891 useless extension candidates. Maximal degree in co-relation 35812. Up to 4039 conditions per place. [2024-06-21 16:00:11,522 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 422 selfloop transitions, 190 changer transitions 0/620 dead transitions. [2024-06-21 16:00:11,522 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 469 places, 620 transitions, 10371 flow [2024-06-21 16:00:11,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:00:11,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:00:11,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-06-21 16:00:11,523 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6067073170731707 [2024-06-21 16:00:11,523 INFO L175 Difference]: Start difference. First operand has 462 places, 589 transitions, 8075 flow. Second operand 8 states and 199 transitions. [2024-06-21 16:00:11,523 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 469 places, 620 transitions, 10371 flow [2024-06-21 16:00:14,565 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 464 places, 620 transitions, 9965 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-21 16:00:14,571 INFO L231 Difference]: Finished difference. Result has 465 places, 595 transitions, 8155 flow [2024-06-21 16:00:14,571 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7681, PETRI_DIFFERENCE_MINUEND_PLACES=457, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=589, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=184, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=405, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8155, PETRI_PLACES=465, PETRI_TRANSITIONS=595} [2024-06-21 16:00:14,572 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 423 predicate places. [2024-06-21 16:00:14,572 INFO L495 AbstractCegarLoop]: Abstraction has has 465 places, 595 transitions, 8155 flow [2024-06-21 16:00:14,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 16:00:14,572 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:00:14,572 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:00:14,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2024-06-21 16:00:14,572 INFO L420 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:00:14,572 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:00:14,573 INFO L85 PathProgramCache]: Analyzing trace with hash -1291099032, now seen corresponding path program 17 times [2024-06-21 16:00:14,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:00:14,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673148075] [2024-06-21 16:00:14,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:00:14,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:00:14,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:00:14,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:00:14,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:00:14,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673148075] [2024-06-21 16:00:14,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673148075] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:00:14,670 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:00:14,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:00:14,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183232273] [2024-06-21 16:00:14,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:00:14,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:00:14,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:00:14,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:00:14,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:00:14,724 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 16:00:14,724 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 465 places, 595 transitions, 8155 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 16:00:14,724 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:00:14,724 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 16:00:14,724 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:00:15,623 INFO L124 PetriNetUnfolderBase]: 2858/4889 cut-off events. [2024-06-21 16:00:15,623 INFO L125 PetriNetUnfolderBase]: For 554908/554908 co-relation queries the response was YES. [2024-06-21 16:00:15,680 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35894 conditions, 4889 events. 2858/4889 cut-off events. For 554908/554908 co-relation queries the response was YES. Maximal size of possible extension queue 439. Compared 33083 event pairs, 511 based on Foata normal form. 1/4887 useless extension candidates. Maximal degree in co-relation 35705. Up to 4036 conditions per place. [2024-06-21 16:00:15,697 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 417 selfloop transitions, 197 changer transitions 0/622 dead transitions. [2024-06-21 16:00:15,697 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 472 places, 622 transitions, 10139 flow [2024-06-21 16:00:15,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:00:15,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:00:15,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 200 transitions. [2024-06-21 16:00:15,698 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-21 16:00:15,698 INFO L175 Difference]: Start difference. First operand has 465 places, 595 transitions, 8155 flow. Second operand 8 states and 200 transitions. [2024-06-21 16:00:15,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 472 places, 622 transitions, 10139 flow [2024-06-21 16:00:19,122 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 468 places, 622 transitions, 9750 flow, removed 29 selfloop flow, removed 4 redundant places. [2024-06-21 16:00:19,128 INFO L231 Difference]: Finished difference. Result has 469 places, 595 transitions, 8166 flow [2024-06-21 16:00:19,129 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7766, PETRI_DIFFERENCE_MINUEND_PLACES=461, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=595, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=197, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=398, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8166, PETRI_PLACES=469, PETRI_TRANSITIONS=595} [2024-06-21 16:00:19,129 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 427 predicate places. [2024-06-21 16:00:19,129 INFO L495 AbstractCegarLoop]: Abstraction has has 469 places, 595 transitions, 8166 flow [2024-06-21 16:00:19,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 16:00:19,129 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:00:19,129 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:00:19,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2024-06-21 16:00:19,129 INFO L420 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:00:19,129 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:00:19,129 INFO L85 PathProgramCache]: Analyzing trace with hash 1133783268, now seen corresponding path program 18 times [2024-06-21 16:00:19,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:00:19,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135347443] [2024-06-21 16:00:19,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:00:19,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:00:19,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:00:19,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:00:19,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:00:19,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135347443] [2024-06-21 16:00:19,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135347443] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:00:19,233 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:00:19,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:00:19,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41971201] [2024-06-21 16:00:19,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:00:19,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:00:19,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:00:19,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:00:19,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:00:19,280 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 16:00:19,280 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 469 places, 595 transitions, 8166 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 16:00:19,280 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:00:19,280 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 16:00:19,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:00:20,316 INFO L124 PetriNetUnfolderBase]: 2863/4898 cut-off events. [2024-06-21 16:00:20,316 INFO L125 PetriNetUnfolderBase]: For 564140/564140 co-relation queries the response was YES. [2024-06-21 16:00:20,373 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36018 conditions, 4898 events. 2863/4898 cut-off events. For 564140/564140 co-relation queries the response was YES. Maximal size of possible extension queue 440. Compared 33149 event pairs, 511 based on Foata normal form. 1/4896 useless extension candidates. Maximal degree in co-relation 35828. Up to 4042 conditions per place. [2024-06-21 16:00:20,388 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 398 selfloop transitions, 211 changer transitions 0/617 dead transitions. [2024-06-21 16:00:20,388 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 476 places, 617 transitions, 9705 flow [2024-06-21 16:00:20,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:00:20,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:00:20,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-21 16:00:20,389 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5823170731707317 [2024-06-21 16:00:20,389 INFO L175 Difference]: Start difference. First operand has 469 places, 595 transitions, 8166 flow. Second operand 8 states and 191 transitions. [2024-06-21 16:00:20,389 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 476 places, 617 transitions, 9705 flow [2024-06-21 16:00:23,570 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 469 places, 617 transitions, 9257 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-21 16:00:23,577 INFO L231 Difference]: Finished difference. Result has 470 places, 598 transitions, 8189 flow [2024-06-21 16:00:23,577 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7724, PETRI_DIFFERENCE_MINUEND_PLACES=462, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=595, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=208, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=387, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8189, PETRI_PLACES=470, PETRI_TRANSITIONS=598} [2024-06-21 16:00:23,577 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 428 predicate places. [2024-06-21 16:00:23,577 INFO L495 AbstractCegarLoop]: Abstraction has has 470 places, 598 transitions, 8189 flow [2024-06-21 16:00:23,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 16:00:23,578 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:00:23,578 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:00:23,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2024-06-21 16:00:23,578 INFO L420 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:00:23,578 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:00:23,579 INFO L85 PathProgramCache]: Analyzing trace with hash -739517780, now seen corresponding path program 13 times [2024-06-21 16:00:23,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:00:23,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457518438] [2024-06-21 16:00:23,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:00:23,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:00:23,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:00:23,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:00:23,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:00:23,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457518438] [2024-06-21 16:00:23,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457518438] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:00:23,678 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:00:23,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:00:23,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499409980] [2024-06-21 16:00:23,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:00:23,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:00:23,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:00:23,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:00:23,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:00:23,720 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 16:00:23,720 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 470 places, 598 transitions, 8189 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 16:00:23,720 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:00:23,720 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 16:00:23,720 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:00:24,616 INFO L124 PetriNetUnfolderBase]: 2873/4916 cut-off events. [2024-06-21 16:00:24,616 INFO L125 PetriNetUnfolderBase]: For 573366/573366 co-relation queries the response was YES. [2024-06-21 16:00:24,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36194 conditions, 4916 events. 2873/4916 cut-off events. For 573366/573366 co-relation queries the response was YES. Maximal size of possible extension queue 443. Compared 33304 event pairs, 520 based on Foata normal form. 1/4914 useless extension candidates. Maximal degree in co-relation 36003. Up to 4129 conditions per place. [2024-06-21 16:00:24,693 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 444 selfloop transitions, 175 changer transitions 0/627 dead transitions. [2024-06-21 16:00:24,693 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 477 places, 627 transitions, 10046 flow [2024-06-21 16:00:24,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:00:24,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:00:24,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-21 16:00:24,694 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5975609756097561 [2024-06-21 16:00:24,694 INFO L175 Difference]: Start difference. First operand has 470 places, 598 transitions, 8189 flow. Second operand 8 states and 196 transitions. [2024-06-21 16:00:24,694 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 477 places, 627 transitions, 10046 flow [2024-06-21 16:00:27,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 472 places, 627 transitions, 9719 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-21 16:00:27,955 INFO L231 Difference]: Finished difference. Result has 474 places, 604 transitions, 8319 flow [2024-06-21 16:00:27,955 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7867, PETRI_DIFFERENCE_MINUEND_PLACES=465, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=598, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=169, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=428, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8319, PETRI_PLACES=474, PETRI_TRANSITIONS=604} [2024-06-21 16:00:27,955 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 432 predicate places. [2024-06-21 16:00:27,956 INFO L495 AbstractCegarLoop]: Abstraction has has 474 places, 604 transitions, 8319 flow [2024-06-21 16:00:27,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 16:00:27,956 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:00:27,956 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:00:27,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2024-06-21 16:00:27,956 INFO L420 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:00:27,957 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:00:27,957 INFO L85 PathProgramCache]: Analyzing trace with hash 227839818, now seen corresponding path program 19 times [2024-06-21 16:00:27,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:00:27,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740049967] [2024-06-21 16:00:27,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:00:27,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:00:27,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:00:28,058 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:00:28,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:00:28,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740049967] [2024-06-21 16:00:28,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740049967] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:00:28,058 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:00:28,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:00:28,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126511429] [2024-06-21 16:00:28,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:00:28,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:00:28,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:00:28,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:00:28,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:00:28,099 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 16:00:28,100 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 474 places, 604 transitions, 8319 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 16:00:28,100 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:00:28,100 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 16:00:28,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:00:29,045 INFO L124 PetriNetUnfolderBase]: 2878/4929 cut-off events. [2024-06-21 16:00:29,045 INFO L125 PetriNetUnfolderBase]: For 583317/583317 co-relation queries the response was YES. [2024-06-21 16:00:29,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36253 conditions, 4929 events. 2878/4929 cut-off events. For 583317/583317 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 33432 event pairs, 513 based on Foata normal form. 1/4927 useless extension candidates. Maximal degree in co-relation 36060. Up to 4284 conditions per place. [2024-06-21 16:00:29,118 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 531 selfloop transitions, 89 changer transitions 0/628 dead transitions. [2024-06-21 16:00:29,118 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 481 places, 628 transitions, 9653 flow [2024-06-21 16:00:29,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:00:29,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:00:29,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 190 transitions. [2024-06-21 16:00:29,119 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5792682926829268 [2024-06-21 16:00:29,119 INFO L175 Difference]: Start difference. First operand has 474 places, 604 transitions, 8319 flow. Second operand 8 states and 190 transitions. [2024-06-21 16:00:29,119 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 481 places, 628 transitions, 9653 flow [2024-06-21 16:00:32,706 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 475 places, 628 transitions, 9125 flow, removed 38 selfloop flow, removed 6 redundant places. [2024-06-21 16:00:32,714 INFO L231 Difference]: Finished difference. Result has 476 places, 607 transitions, 8023 flow [2024-06-21 16:00:32,715 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7791, PETRI_DIFFERENCE_MINUEND_PLACES=468, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=604, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=515, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8023, PETRI_PLACES=476, PETRI_TRANSITIONS=607} [2024-06-21 16:00:32,715 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 434 predicate places. [2024-06-21 16:00:32,715 INFO L495 AbstractCegarLoop]: Abstraction has has 476 places, 607 transitions, 8023 flow [2024-06-21 16:00:32,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 16:00:32,715 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:00:32,715 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:00:32,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2024-06-21 16:00:32,716 INFO L420 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:00:32,716 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:00:32,716 INFO L85 PathProgramCache]: Analyzing trace with hash 552581124, now seen corresponding path program 14 times [2024-06-21 16:00:32,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:00:32,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094653658] [2024-06-21 16:00:32,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:00:32,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:00:32,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:00:32,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:00:32,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:00:32,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094653658] [2024-06-21 16:00:32,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094653658] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:00:32,857 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:00:32,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:00:32,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087592071] [2024-06-21 16:00:32,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:00:32,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:00:32,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:00:32,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:00:32,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:00:32,902 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 16:00:32,903 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 476 places, 607 transitions, 8023 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 16:00:32,903 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:00:32,903 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 16:00:32,903 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:00:33,872 INFO L124 PetriNetUnfolderBase]: 2883/4938 cut-off events. [2024-06-21 16:00:33,873 INFO L125 PetriNetUnfolderBase]: For 590236/590236 co-relation queries the response was YES. [2024-06-21 16:00:33,931 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35973 conditions, 4938 events. 2883/4938 cut-off events. For 590236/590236 co-relation queries the response was YES. Maximal size of possible extension queue 446. Compared 33522 event pairs, 522 based on Foata normal form. 1/4936 useless extension candidates. Maximal degree in co-relation 35780. Up to 4142 conditions per place. [2024-06-21 16:00:33,947 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 452 selfloop transitions, 171 changer transitions 0/631 dead transitions. [2024-06-21 16:00:33,947 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 483 places, 631 transitions, 10073 flow [2024-06-21 16:00:33,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:00:33,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:00:33,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-21 16:00:33,948 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5975609756097561 [2024-06-21 16:00:33,948 INFO L175 Difference]: Start difference. First operand has 476 places, 607 transitions, 8023 flow. Second operand 8 states and 196 transitions. [2024-06-21 16:00:33,948 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 483 places, 631 transitions, 10073 flow [2024-06-21 16:00:37,661 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 476 places, 631 transitions, 9873 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-21 16:00:37,667 INFO L231 Difference]: Finished difference. Result has 477 places, 610 transitions, 8211 flow [2024-06-21 16:00:37,668 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7823, PETRI_DIFFERENCE_MINUEND_PLACES=469, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=607, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=168, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=439, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8211, PETRI_PLACES=477, PETRI_TRANSITIONS=610} [2024-06-21 16:00:37,668 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 435 predicate places. [2024-06-21 16:00:37,668 INFO L495 AbstractCegarLoop]: Abstraction has has 477 places, 610 transitions, 8211 flow [2024-06-21 16:00:37,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 16:00:37,668 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:00:37,668 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:00:37,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2024-06-21 16:00:37,669 INFO L420 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:00:37,669 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:00:37,669 INFO L85 PathProgramCache]: Analyzing trace with hash 552967074, now seen corresponding path program 15 times [2024-06-21 16:00:37,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:00:37,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049973204] [2024-06-21 16:00:37,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:00:37,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:00:37,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:00:37,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:00:37,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:00:37,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049973204] [2024-06-21 16:00:37,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049973204] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:00:37,769 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:00:37,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:00:37,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244701037] [2024-06-21 16:00:37,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:00:37,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:00:37,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:00:37,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:00:37,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:00:37,806 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 16:00:37,806 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 477 places, 610 transitions, 8211 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 16:00:37,806 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:00:37,807 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 16:00:37,807 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:00:38,769 INFO L124 PetriNetUnfolderBase]: 2880/4930 cut-off events. [2024-06-21 16:00:38,770 INFO L125 PetriNetUnfolderBase]: For 592962/592962 co-relation queries the response was YES. [2024-06-21 16:00:38,828 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36056 conditions, 4930 events. 2880/4930 cut-off events. For 592962/592962 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 33435 event pairs, 520 based on Foata normal form. 1/4928 useless extension candidates. Maximal degree in co-relation 35863. Up to 4139 conditions per place. [2024-06-21 16:00:38,846 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 450 selfloop transitions, 172 changer transitions 0/630 dead transitions. [2024-06-21 16:00:38,846 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 484 places, 630 transitions, 9983 flow [2024-06-21 16:00:38,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:00:38,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:00:38,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-21 16:00:38,847 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5914634146341463 [2024-06-21 16:00:38,847 INFO L175 Difference]: Start difference. First operand has 477 places, 610 transitions, 8211 flow. Second operand 8 states and 194 transitions. [2024-06-21 16:00:38,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 484 places, 630 transitions, 9983 flow [2024-06-21 16:00:42,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 479 places, 630 transitions, 9577 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-21 16:00:42,523 INFO L231 Difference]: Finished difference. Result has 480 places, 610 transitions, 8155 flow [2024-06-21 16:00:42,523 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7805, PETRI_DIFFERENCE_MINUEND_PLACES=472, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=610, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=172, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=438, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8155, PETRI_PLACES=480, PETRI_TRANSITIONS=610} [2024-06-21 16:00:42,523 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 438 predicate places. [2024-06-21 16:00:42,524 INFO L495 AbstractCegarLoop]: Abstraction has has 480 places, 610 transitions, 8155 flow [2024-06-21 16:00:42,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 16:00:42,524 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:00:42,524 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:00:42,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159 [2024-06-21 16:00:42,524 INFO L420 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:00:42,524 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:00:42,524 INFO L85 PathProgramCache]: Analyzing trace with hash 552788328, now seen corresponding path program 20 times [2024-06-21 16:00:42,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:00:42,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041800470] [2024-06-21 16:00:42,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:00:42,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:00:42,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:00:42,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:00:42,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:00:42,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041800470] [2024-06-21 16:00:42,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041800470] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:00:42,655 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:00:42,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:00:42,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692173434] [2024-06-21 16:00:42,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:00:42,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:00:42,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:00:42,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:00:42,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:00:42,706 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 16:00:42,706 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 480 places, 610 transitions, 8155 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 16:00:42,707 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:00:42,707 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 16:00:42,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:00:43,793 INFO L124 PetriNetUnfolderBase]: 2877/4926 cut-off events. [2024-06-21 16:00:43,793 INFO L125 PetriNetUnfolderBase]: For 594447/594447 co-relation queries the response was YES. [2024-06-21 16:00:43,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35960 conditions, 4926 events. 2877/4926 cut-off events. For 594447/594447 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 33413 event pairs, 511 based on Foata normal form. 1/4924 useless extension candidates. Maximal degree in co-relation 35766. Up to 4273 conditions per place. [2024-06-21 16:00:43,865 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 526 selfloop transitions, 95 changer transitions 0/629 dead transitions. [2024-06-21 16:00:43,865 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 487 places, 629 transitions, 9685 flow [2024-06-21 16:00:43,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:00:43,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:00:43,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 190 transitions. [2024-06-21 16:00:43,866 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5792682926829268 [2024-06-21 16:00:43,866 INFO L175 Difference]: Start difference. First operand has 480 places, 610 transitions, 8155 flow. Second operand 8 states and 190 transitions. [2024-06-21 16:00:43,866 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 487 places, 629 transitions, 9685 flow [2024-06-21 16:00:47,750 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 480 places, 629 transitions, 9257 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-21 16:00:47,757 INFO L231 Difference]: Finished difference. Result has 481 places, 610 transitions, 7923 flow [2024-06-21 16:00:47,757 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7727, PETRI_DIFFERENCE_MINUEND_PLACES=473, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=610, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=515, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7923, PETRI_PLACES=481, PETRI_TRANSITIONS=610} [2024-06-21 16:00:47,757 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 439 predicate places. [2024-06-21 16:00:47,757 INFO L495 AbstractCegarLoop]: Abstraction has has 481 places, 610 transitions, 7923 flow [2024-06-21 16:00:47,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 16:00:47,757 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:00:47,757 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:00:47,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160 [2024-06-21 16:00:47,758 INFO L420 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:00:47,758 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:00:47,758 INFO L85 PathProgramCache]: Analyzing trace with hash 1588771718, now seen corresponding path program 21 times [2024-06-21 16:00:47,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:00:47,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537869359] [2024-06-21 16:00:47,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:00:47,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:00:47,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:00:47,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:00:47,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:00:47,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537869359] [2024-06-21 16:00:47,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537869359] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:00:47,856 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:00:47,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:00:47,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952908008] [2024-06-21 16:00:47,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:00:47,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:00:47,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:00:47,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:00:47,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:00:47,889 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 16:00:47,889 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 481 places, 610 transitions, 7923 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 16:00:47,889 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:00:47,890 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 16:00:47,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:00:48,889 INFO L124 PetriNetUnfolderBase]: 2874/4922 cut-off events. [2024-06-21 16:00:48,889 INFO L125 PetriNetUnfolderBase]: For 595174/595174 co-relation queries the response was YES. [2024-06-21 16:00:48,950 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35695 conditions, 4922 events. 2874/4922 cut-off events. For 595174/595174 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 33415 event pairs, 511 based on Foata normal form. 1/4920 useless extension candidates. Maximal degree in co-relation 35500. Up to 4270 conditions per place. [2024-06-21 16:00:48,969 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 526 selfloop transitions, 96 changer transitions 0/630 dead transitions. [2024-06-21 16:00:48,969 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 490 places, 630 transitions, 9215 flow [2024-06-21 16:00:48,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:00:48,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:00:48,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 227 transitions. [2024-06-21 16:00:48,970 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5536585365853659 [2024-06-21 16:00:48,970 INFO L175 Difference]: Start difference. First operand has 481 places, 610 transitions, 7923 flow. Second operand 10 states and 227 transitions. [2024-06-21 16:00:48,970 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 490 places, 630 transitions, 9215 flow [2024-06-21 16:00:53,269 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 485 places, 630 transitions, 8988 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-21 16:00:53,276 INFO L231 Difference]: Finished difference. Result has 486 places, 610 transitions, 7894 flow [2024-06-21 16:00:53,276 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7696, PETRI_DIFFERENCE_MINUEND_PLACES=476, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=610, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=514, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7894, PETRI_PLACES=486, PETRI_TRANSITIONS=610} [2024-06-21 16:00:53,276 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 444 predicate places. [2024-06-21 16:00:53,276 INFO L495 AbstractCegarLoop]: Abstraction has has 486 places, 610 transitions, 7894 flow [2024-06-21 16:00:53,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 16:00:53,276 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:00:53,277 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:00:53,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161 [2024-06-21 16:00:53,277 INFO L420 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:00:53,277 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:00:53,277 INFO L85 PathProgramCache]: Analyzing trace with hash 1674854468, now seen corresponding path program 16 times [2024-06-21 16:00:53,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:00:53,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488497541] [2024-06-21 16:00:53,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:00:53,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:00:53,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:00:53,375 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:00:53,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:00:53,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488497541] [2024-06-21 16:00:53,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488497541] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:00:53,375 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:00:53,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:00:53,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509533749] [2024-06-21 16:00:53,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:00:53,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:00:53,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:00:53,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:00:53,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:00:53,423 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 16:00:53,423 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 486 places, 610 transitions, 7894 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 16:00:53,423 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:00:53,423 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 16:00:53,423 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:00:54,343 INFO L124 PetriNetUnfolderBase]: 2879/4941 cut-off events. [2024-06-21 16:00:54,343 INFO L125 PetriNetUnfolderBase]: For 603612/603612 co-relation queries the response was YES. [2024-06-21 16:00:54,403 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35807 conditions, 4941 events. 2879/4941 cut-off events. For 603612/603612 co-relation queries the response was YES. Maximal size of possible extension queue 446. Compared 33527 event pairs, 493 based on Foata normal form. 1/4941 useless extension candidates. Maximal degree in co-relation 35611. Up to 4414 conditions per place. [2024-06-21 16:00:54,421 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 589 selfloop transitions, 31 changer transitions 0/628 dead transitions. [2024-06-21 16:00:54,421 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 493 places, 628 transitions, 9218 flow [2024-06-21 16:00:54,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:00:54,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:00:54,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 180 transitions. [2024-06-21 16:00:54,422 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5487804878048781 [2024-06-21 16:00:54,422 INFO L175 Difference]: Start difference. First operand has 486 places, 610 transitions, 7894 flow. Second operand 8 states and 180 transitions. [2024-06-21 16:00:54,422 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 493 places, 628 transitions, 9218 flow [2024-06-21 16:00:58,436 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 483 places, 628 transitions, 8998 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-06-21 16:00:58,442 INFO L231 Difference]: Finished difference. Result has 484 places, 613 transitions, 7796 flow [2024-06-21 16:00:58,443 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7674, PETRI_DIFFERENCE_MINUEND_PLACES=476, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=610, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=579, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7796, PETRI_PLACES=484, PETRI_TRANSITIONS=613} [2024-06-21 16:00:58,443 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 442 predicate places. [2024-06-21 16:00:58,443 INFO L495 AbstractCegarLoop]: Abstraction has has 484 places, 613 transitions, 7796 flow [2024-06-21 16:00:58,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 16:00:58,443 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:00:58,443 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:00:58,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162 [2024-06-21 16:00:58,443 INFO L420 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:00:58,443 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:00:58,443 INFO L85 PathProgramCache]: Analyzing trace with hash 3126178, now seen corresponding path program 17 times [2024-06-21 16:00:58,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:00:58,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739145074] [2024-06-21 16:00:58,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:00:58,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:00:58,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:00:58,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:00:58,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:00:58,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739145074] [2024-06-21 16:00:58,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739145074] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:00:58,538 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:00:58,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:00:58,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111037196] [2024-06-21 16:00:58,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:00:58,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:00:58,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:00:58,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:00:58,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:00:58,582 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 16:00:58,582 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 484 places, 613 transitions, 7796 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 16:00:58,582 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:00:58,582 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 16:00:58,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:00:59,498 INFO L124 PetriNetUnfolderBase]: 2897/4962 cut-off events. [2024-06-21 16:00:59,499 INFO L125 PetriNetUnfolderBase]: For 621174/621174 co-relation queries the response was YES. [2024-06-21 16:00:59,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36028 conditions, 4962 events. 2897/4962 cut-off events. For 621174/621174 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 33729 event pairs, 520 based on Foata normal form. 1/4960 useless extension candidates. Maximal degree in co-relation 35831. Up to 4156 conditions per place. [2024-06-21 16:00:59,577 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 449 selfloop transitions, 182 changer transitions 0/639 dead transitions. [2024-06-21 16:00:59,577 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 491 places, 639 transitions, 9742 flow [2024-06-21 16:00:59,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:00:59,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:00:59,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-06-21 16:00:59,578 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-21 16:00:59,578 INFO L175 Difference]: Start difference. First operand has 484 places, 613 transitions, 7796 flow. Second operand 8 states and 192 transitions. [2024-06-21 16:00:59,578 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 491 places, 639 transitions, 9742 flow [2024-06-21 16:01:03,890 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 485 places, 639 transitions, 9654 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-21 16:01:03,897 INFO L231 Difference]: Finished difference. Result has 487 places, 622 transitions, 8240 flow [2024-06-21 16:01:03,898 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7708, PETRI_DIFFERENCE_MINUEND_PLACES=478, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=613, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=173, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=439, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8240, PETRI_PLACES=487, PETRI_TRANSITIONS=622} [2024-06-21 16:01:03,898 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 445 predicate places. [2024-06-21 16:01:03,898 INFO L495 AbstractCegarLoop]: Abstraction has has 487 places, 622 transitions, 8240 flow [2024-06-21 16:01:03,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 16:01:03,898 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:01:03,898 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:01:03,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163 [2024-06-21 16:01:03,899 INFO L420 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:01:03,899 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:01:03,899 INFO L85 PathProgramCache]: Analyzing trace with hash 259447942, now seen corresponding path program 22 times [2024-06-21 16:01:03,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:01:03,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153531205] [2024-06-21 16:01:03,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:01:03,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:01:03,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:01:03,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:01:03,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:01:03,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153531205] [2024-06-21 16:01:03,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153531205] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:01:03,996 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:01:03,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:01:03,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035496624] [2024-06-21 16:01:03,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:01:03,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:01:03,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:01:03,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:01:03,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:01:04,046 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 16:01:04,047 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 487 places, 622 transitions, 8240 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 16:01:04,047 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:01:04,047 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 16:01:04,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:01:05,039 INFO L124 PetriNetUnfolderBase]: 2918/4997 cut-off events. [2024-06-21 16:01:05,039 INFO L125 PetriNetUnfolderBase]: For 647795/647795 co-relation queries the response was YES. [2024-06-21 16:01:05,104 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36890 conditions, 4997 events. 2918/4997 cut-off events. For 647795/647795 co-relation queries the response was YES. Maximal size of possible extension queue 455. Compared 34001 event pairs, 511 based on Foata normal form. 1/4995 useless extension candidates. Maximal degree in co-relation 36691. Up to 4295 conditions per place. [2024-06-21 16:01:05,122 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 510 selfloop transitions, 129 changer transitions 0/647 dead transitions. [2024-06-21 16:01:05,123 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 494 places, 647 transitions, 9938 flow [2024-06-21 16:01:05,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:01:05,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:01:05,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 187 transitions. [2024-06-21 16:01:05,123 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5701219512195121 [2024-06-21 16:01:05,123 INFO L175 Difference]: Start difference. First operand has 487 places, 622 transitions, 8240 flow. Second operand 8 states and 187 transitions. [2024-06-21 16:01:05,124 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 494 places, 647 transitions, 9938 flow [2024-06-21 16:01:09,432 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 491 places, 647 transitions, 9652 flow, removed 24 selfloop flow, removed 3 redundant places. [2024-06-21 16:01:09,440 INFO L231 Difference]: Finished difference. Result has 493 places, 631 transitions, 8414 flow [2024-06-21 16:01:09,440 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7954, PETRI_DIFFERENCE_MINUEND_PLACES=484, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=622, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=493, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8414, PETRI_PLACES=493, PETRI_TRANSITIONS=631} [2024-06-21 16:01:09,441 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 451 predicate places. [2024-06-21 16:01:09,441 INFO L495 AbstractCegarLoop]: Abstraction has has 493 places, 631 transitions, 8414 flow [2024-06-21 16:01:09,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 16:01:09,441 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:01:09,441 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:01:09,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164 [2024-06-21 16:01:09,442 INFO L420 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:01:09,442 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:01:09,442 INFO L85 PathProgramCache]: Analyzing trace with hash 2947432, now seen corresponding path program 23 times [2024-06-21 16:01:09,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:01:09,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497220762] [2024-06-21 16:01:09,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:01:09,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:01:09,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:01:09,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:01:09,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:01:09,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497220762] [2024-06-21 16:01:09,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497220762] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:01:09,569 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:01:09,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:01:09,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615654070] [2024-06-21 16:01:09,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:01:09,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:01:09,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:01:09,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:01:09,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:01:09,621 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 16:01:09,621 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 493 places, 631 transitions, 8414 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 16:01:09,621 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:01:09,621 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 16:01:09,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:01:10,731 INFO L124 PetriNetUnfolderBase]: 2915/4993 cut-off events. [2024-06-21 16:01:10,731 INFO L125 PetriNetUnfolderBase]: For 649939/649939 co-relation queries the response was YES. [2024-06-21 16:01:10,793 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36814 conditions, 4993 events. 2915/4993 cut-off events. For 649939/649939 co-relation queries the response was YES. Maximal size of possible extension queue 455. Compared 33989 event pairs, 511 based on Foata normal form. 1/4991 useless extension candidates. Maximal degree in co-relation 36613. Up to 4292 conditions per place. [2024-06-21 16:01:10,811 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 511 selfloop transitions, 130 changer transitions 0/649 dead transitions. [2024-06-21 16:01:10,811 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 502 places, 649 transitions, 9990 flow [2024-06-21 16:01:10,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:01:10,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:01:10,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 228 transitions. [2024-06-21 16:01:10,811 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5560975609756098 [2024-06-21 16:01:10,812 INFO L175 Difference]: Start difference. First operand has 493 places, 631 transitions, 8414 flow. Second operand 10 states and 228 transitions. [2024-06-21 16:01:10,812 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 502 places, 649 transitions, 9990 flow [2024-06-21 16:01:15,267 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 498 places, 649 transitions, 9808 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-21 16:01:15,274 INFO L231 Difference]: Finished difference. Result has 499 places, 631 transitions, 8498 flow [2024-06-21 16:01:15,274 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8232, PETRI_DIFFERENCE_MINUEND_PLACES=489, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=631, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=501, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8498, PETRI_PLACES=499, PETRI_TRANSITIONS=631} [2024-06-21 16:01:15,274 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 457 predicate places. [2024-06-21 16:01:15,275 INFO L495 AbstractCegarLoop]: Abstraction has has 499 places, 631 transitions, 8498 flow [2024-06-21 16:01:15,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 16:01:15,275 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:01:15,275 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:01:15,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165 [2024-06-21 16:01:15,275 INFO L420 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:01:15,276 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:01:15,276 INFO L85 PathProgramCache]: Analyzing trace with hash 1038930822, now seen corresponding path program 24 times [2024-06-21 16:01:15,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:01:15,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046627953] [2024-06-21 16:01:15,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:01:15,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:01:15,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:01:15,377 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:01:15,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:01:15,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046627953] [2024-06-21 16:01:15,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046627953] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:01:15,377 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:01:15,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:01:15,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17770558] [2024-06-21 16:01:15,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:01:15,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:01:15,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:01:15,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:01:15,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:01:15,420 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 16:01:15,420 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 499 places, 631 transitions, 8498 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 16:01:15,420 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:01:15,420 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 16:01:15,420 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:01:16,453 INFO L124 PetriNetUnfolderBase]: 2912/4989 cut-off events. [2024-06-21 16:01:16,453 INFO L125 PetriNetUnfolderBase]: For 652180/652180 co-relation queries the response was YES. [2024-06-21 16:01:16,516 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36731 conditions, 4989 events. 2912/4989 cut-off events. For 652180/652180 co-relation queries the response was YES. Maximal size of possible extension queue 455. Compared 33951 event pairs, 511 based on Foata normal form. 1/4987 useless extension candidates. Maximal degree in co-relation 36530. Up to 4289 conditions per place. [2024-06-21 16:01:16,534 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 509 selfloop transitions, 132 changer transitions 0/649 dead transitions. [2024-06-21 16:01:16,534 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 509 places, 649 transitions, 9822 flow [2024-06-21 16:01:16,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:01:16,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:01:16,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 243 transitions. [2024-06-21 16:01:16,535 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5388026607538803 [2024-06-21 16:01:16,535 INFO L175 Difference]: Start difference. First operand has 499 places, 631 transitions, 8498 flow. Second operand 11 states and 243 transitions. [2024-06-21 16:01:16,535 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 509 places, 649 transitions, 9822 flow [2024-06-21 16:01:21,170 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 499 places, 649 transitions, 9410 flow, removed 24 selfloop flow, removed 10 redundant places. [2024-06-21 16:01:21,177 INFO L231 Difference]: Finished difference. Result has 500 places, 631 transitions, 8356 flow [2024-06-21 16:01:21,177 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8086, PETRI_DIFFERENCE_MINUEND_PLACES=489, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=631, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=499, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8356, PETRI_PLACES=500, PETRI_TRANSITIONS=631} [2024-06-21 16:01:21,177 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 458 predicate places. [2024-06-21 16:01:21,177 INFO L495 AbstractCegarLoop]: Abstraction has has 500 places, 631 transitions, 8356 flow [2024-06-21 16:01:21,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 16:01:21,177 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:01:21,177 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:01:21,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166 [2024-06-21 16:01:21,178 INFO L420 AbstractCegarLoop]: === Iteration 168 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:01:21,178 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:01:21,178 INFO L85 PathProgramCache]: Analyzing trace with hash 1038931008, now seen corresponding path program 18 times [2024-06-21 16:01:21,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:01:21,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938851625] [2024-06-21 16:01:21,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:01:21,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:01:21,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:01:21,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:01:21,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:01:21,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938851625] [2024-06-21 16:01:21,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938851625] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:01:21,270 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:01:21,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:01:21,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448787531] [2024-06-21 16:01:21,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:01:21,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:01:21,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:01:21,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:01:21,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:01:21,306 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 16:01:21,307 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 500 places, 631 transitions, 8356 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 16:01:21,307 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:01:21,307 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 16:01:21,307 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:01:22,287 INFO L124 PetriNetUnfolderBase]: 2909/4985 cut-off events. [2024-06-21 16:01:22,287 INFO L125 PetriNetUnfolderBase]: For 653182/653182 co-relation queries the response was YES. [2024-06-21 16:01:22,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36537 conditions, 4985 events. 2909/4985 cut-off events. For 653182/653182 co-relation queries the response was YES. Maximal size of possible extension queue 455. Compared 33939 event pairs, 520 based on Foata normal form. 1/4983 useless extension candidates. Maximal degree in co-relation 36336. Up to 4174 conditions per place. [2024-06-21 16:01:22,367 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 456 selfloop transitions, 183 changer transitions 0/647 dead transitions. [2024-06-21 16:01:22,367 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 507 places, 647 transitions, 9928 flow [2024-06-21 16:01:22,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:01:22,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:01:22,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 190 transitions. [2024-06-21 16:01:22,368 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5792682926829268 [2024-06-21 16:01:22,368 INFO L175 Difference]: Start difference. First operand has 500 places, 631 transitions, 8356 flow. Second operand 8 states and 190 transitions. [2024-06-21 16:01:22,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 507 places, 647 transitions, 9928 flow [2024-06-21 16:01:27,088 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 497 places, 647 transitions, 9630 flow, removed 14 selfloop flow, removed 10 redundant places. [2024-06-21 16:01:27,095 INFO L231 Difference]: Finished difference. Result has 498 places, 631 transitions, 8430 flow [2024-06-21 16:01:27,095 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8058, PETRI_DIFFERENCE_MINUEND_PLACES=490, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=631, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=183, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=448, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8430, PETRI_PLACES=498, PETRI_TRANSITIONS=631} [2024-06-21 16:01:27,095 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 456 predicate places. [2024-06-21 16:01:27,096 INFO L495 AbstractCegarLoop]: Abstraction has has 498 places, 631 transitions, 8430 flow [2024-06-21 16:01:27,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 16:01:27,096 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:01:27,096 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:01:27,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167 [2024-06-21 16:01:27,096 INFO L420 AbstractCegarLoop]: === Iteration 169 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:01:27,096 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:01:27,096 INFO L85 PathProgramCache]: Analyzing trace with hash -809759010, now seen corresponding path program 19 times [2024-06-21 16:01:27,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:01:27,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209831299] [2024-06-21 16:01:27,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:01:27,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:01:27,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:01:27,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:01:27,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:01:27,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209831299] [2024-06-21 16:01:27,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209831299] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:01:27,192 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:01:27,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:01:27,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695728438] [2024-06-21 16:01:27,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:01:27,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:01:27,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:01:27,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:01:27,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:01:27,231 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 16:01:27,231 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 498 places, 631 transitions, 8430 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 16:01:27,231 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:01:27,231 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 16:01:27,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:01:28,272 INFO L124 PetriNetUnfolderBase]: 2946/5059 cut-off events. [2024-06-21 16:01:28,272 INFO L125 PetriNetUnfolderBase]: For 697806/697808 co-relation queries the response was YES. [2024-06-21 16:01:28,332 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37667 conditions, 5059 events. 2946/5059 cut-off events. For 697806/697808 co-relation queries the response was YES. Maximal size of possible extension queue 464. Compared 34525 event pairs, 504 based on Foata normal form. 3/5061 useless extension candidates. Maximal degree in co-relation 37465. Up to 4216 conditions per place. [2024-06-21 16:01:28,347 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 450 selfloop transitions, 208 changer transitions 0/666 dead transitions. [2024-06-21 16:01:28,347 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 504 places, 666 transitions, 10875 flow [2024-06-21 16:01:28,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:01:28,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:01:28,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-21 16:01:28,348 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6027874564459931 [2024-06-21 16:01:28,348 INFO L175 Difference]: Start difference. First operand has 498 places, 631 transitions, 8430 flow. Second operand 7 states and 173 transitions. [2024-06-21 16:01:28,348 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 504 places, 666 transitions, 10875 flow [2024-06-21 16:01:33,081 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 497 places, 666 transitions, 10475 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-21 16:01:33,088 INFO L231 Difference]: Finished difference. Result has 498 places, 646 transitions, 8763 flow [2024-06-21 16:01:33,089 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8060, PETRI_DIFFERENCE_MINUEND_PLACES=491, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=631, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=193, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=438, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8763, PETRI_PLACES=498, PETRI_TRANSITIONS=646} [2024-06-21 16:01:33,089 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 456 predicate places. [2024-06-21 16:01:33,089 INFO L495 AbstractCegarLoop]: Abstraction has has 498 places, 646 transitions, 8763 flow [2024-06-21 16:01:33,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 16:01:33,089 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:01:33,089 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:01:33,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable168 [2024-06-21 16:01:33,089 INFO L420 AbstractCegarLoop]: === Iteration 170 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:01:33,090 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:01:33,090 INFO L85 PathProgramCache]: Analyzing trace with hash -313426686, now seen corresponding path program 25 times [2024-06-21 16:01:33,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:01:33,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434996263] [2024-06-21 16:01:33,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:01:33,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:01:33,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:01:33,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:01:33,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:01:33,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434996263] [2024-06-21 16:01:33,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434996263] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:01:33,186 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:01:33,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:01:33,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792852858] [2024-06-21 16:01:33,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:01:33,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:01:33,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:01:33,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:01:33,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:01:33,221 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 16:01:33,221 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 498 places, 646 transitions, 8763 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 16:01:33,221 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:01:33,221 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 16:01:33,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:01:34,230 INFO L124 PetriNetUnfolderBase]: 2943/5044 cut-off events. [2024-06-21 16:01:34,230 INFO L125 PetriNetUnfolderBase]: For 699539/699539 co-relation queries the response was YES. [2024-06-21 16:01:34,294 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37610 conditions, 5044 events. 2943/5044 cut-off events. For 699539/699539 co-relation queries the response was YES. Maximal size of possible extension queue 464. Compared 34430 event pairs, 513 based on Foata normal form. 1/5042 useless extension candidates. Maximal degree in co-relation 37407. Up to 4192 conditions per place. [2024-06-21 16:01:34,313 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 469 selfloop transitions, 193 changer transitions 0/670 dead transitions. [2024-06-21 16:01:34,313 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 504 places, 670 transitions, 10407 flow [2024-06-21 16:01:34,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:01:34,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:01:34,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-21 16:01:34,313 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6202090592334495 [2024-06-21 16:01:34,314 INFO L175 Difference]: Start difference. First operand has 498 places, 646 transitions, 8763 flow. Second operand 7 states and 178 transitions. [2024-06-21 16:01:34,314 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 504 places, 670 transitions, 10407 flow [2024-06-21 16:01:39,456 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 501 places, 670 transitions, 10127 flow, removed 44 selfloop flow, removed 3 redundant places. [2024-06-21 16:01:39,463 INFO L231 Difference]: Finished difference. Result has 502 places, 646 transitions, 8885 flow [2024-06-21 16:01:39,463 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8485, PETRI_DIFFERENCE_MINUEND_PLACES=495, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=646, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=193, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=453, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8885, PETRI_PLACES=502, PETRI_TRANSITIONS=646} [2024-06-21 16:01:39,463 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 460 predicate places. [2024-06-21 16:01:39,463 INFO L495 AbstractCegarLoop]: Abstraction has has 502 places, 646 transitions, 8885 flow [2024-06-21 16:01:39,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 16:01:39,464 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:01:39,464 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:01:39,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable169 [2024-06-21 16:01:39,464 INFO L420 AbstractCegarLoop]: === Iteration 171 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:01:39,464 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:01:39,464 INFO L85 PathProgramCache]: Analyzing trace with hash 415896734, now seen corresponding path program 20 times [2024-06-21 16:01:39,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:01:39,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108562738] [2024-06-21 16:01:39,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:01:39,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:01:39,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:01:39,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:01:39,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:01:39,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108562738] [2024-06-21 16:01:39,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108562738] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:01:39,565 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:01:39,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:01:39,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397273818] [2024-06-21 16:01:39,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:01:39,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:01:39,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:01:39,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:01:39,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:01:39,601 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 16:01:39,601 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 502 places, 646 transitions, 8885 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 16:01:39,601 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:01:39,601 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 16:01:39,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:01:40,630 INFO L124 PetriNetUnfolderBase]: 2948/5059 cut-off events. [2024-06-21 16:01:40,631 INFO L125 PetriNetUnfolderBase]: For 700351/700351 co-relation queries the response was YES. [2024-06-21 16:01:40,695 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37697 conditions, 5059 events. 2948/5059 cut-off events. For 700351/700351 co-relation queries the response was YES. Maximal size of possible extension queue 464. Compared 34490 event pairs, 493 based on Foata normal form. 1/5059 useless extension candidates. Maximal degree in co-relation 37494. Up to 4504 conditions per place. [2024-06-21 16:01:40,714 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 618 selfloop transitions, 37 changer transitions 0/663 dead transitions. [2024-06-21 16:01:40,714 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 508 places, 663 transitions, 10289 flow [2024-06-21 16:01:40,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:01:40,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:01:40,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 161 transitions. [2024-06-21 16:01:40,715 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5609756097560976 [2024-06-21 16:01:40,715 INFO L175 Difference]: Start difference. First operand has 502 places, 646 transitions, 8885 flow. Second operand 7 states and 161 transitions. [2024-06-21 16:01:40,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 508 places, 663 transitions, 10289 flow [2024-06-21 16:01:45,390 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 499 places, 663 transitions, 9731 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-21 16:01:45,397 INFO L231 Difference]: Finished difference. Result has 500 places, 649 transitions, 8477 flow [2024-06-21 16:01:45,398 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8327, PETRI_DIFFERENCE_MINUEND_PLACES=493, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=646, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=609, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8477, PETRI_PLACES=500, PETRI_TRANSITIONS=649} [2024-06-21 16:01:45,398 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 458 predicate places. [2024-06-21 16:01:45,398 INFO L495 AbstractCegarLoop]: Abstraction has has 500 places, 649 transitions, 8477 flow [2024-06-21 16:01:45,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 16:01:45,398 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:01:45,398 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:01:45,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170 [2024-06-21 16:01:45,398 INFO L420 AbstractCegarLoop]: === Iteration 172 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:01:45,399 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:01:45,399 INFO L85 PathProgramCache]: Analyzing trace with hash -1725719556, now seen corresponding path program 21 times [2024-06-21 16:01:45,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:01:45,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954017898] [2024-06-21 16:01:45,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:01:45,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:01:45,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:01:45,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:01:45,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:01:45,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954017898] [2024-06-21 16:01:45,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954017898] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:01:45,500 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:01:45,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:01:45,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235863046] [2024-06-21 16:01:45,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:01:45,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:01:45,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:01:45,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:01:45,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:01:45,540 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 16:01:45,540 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 500 places, 649 transitions, 8477 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 16:01:45,541 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:01:45,541 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 16:01:45,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:01:46,575 INFO L124 PetriNetUnfolderBase]: 2945/5060 cut-off events. [2024-06-21 16:01:46,576 INFO L125 PetriNetUnfolderBase]: For 679932/679934 co-relation queries the response was YES. [2024-06-21 16:01:46,642 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36986 conditions, 5060 events. 2945/5060 cut-off events. For 679932/679934 co-relation queries the response was YES. Maximal size of possible extension queue 465. Compared 34610 event pairs, 504 based on Foata normal form. 3/5062 useless extension candidates. Maximal degree in co-relation 36783. Up to 4333 conditions per place. [2024-06-21 16:01:46,660 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 540 selfloop transitions, 125 changer transitions 0/673 dead transitions. [2024-06-21 16:01:46,660 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 505 places, 673 transitions, 10383 flow [2024-06-21 16:01:46,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:01:46,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:01:46,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 161 transitions. [2024-06-21 16:01:46,661 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6544715447154471 [2024-06-21 16:01:46,661 INFO L175 Difference]: Start difference. First operand has 500 places, 649 transitions, 8477 flow. Second operand 6 states and 161 transitions. [2024-06-21 16:01:46,661 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 505 places, 673 transitions, 10383 flow [2024-06-21 16:01:50,752 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 500 places, 673 transitions, 10287 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-21 16:01:50,760 INFO L231 Difference]: Finished difference. Result has 501 places, 649 transitions, 8655 flow [2024-06-21 16:01:50,760 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8381, PETRI_DIFFERENCE_MINUEND_PLACES=495, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=649, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=524, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=8655, PETRI_PLACES=501, PETRI_TRANSITIONS=649} [2024-06-21 16:01:50,760 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 459 predicate places. [2024-06-21 16:01:50,760 INFO L495 AbstractCegarLoop]: Abstraction has has 501 places, 649 transitions, 8655 flow [2024-06-21 16:01:50,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 16:01:50,760 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:01:50,760 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:01:50,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171 [2024-06-21 16:01:50,761 INFO L420 AbstractCegarLoop]: === Iteration 173 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:01:50,761 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:01:50,761 INFO L85 PathProgramCache]: Analyzing trace with hash -12199936, now seen corresponding path program 22 times [2024-06-21 16:01:50,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:01:50,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570139617] [2024-06-21 16:01:50,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:01:50,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:01:50,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:01:50,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:01:50,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:01:50,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570139617] [2024-06-21 16:01:50,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570139617] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:01:50,857 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:01:50,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:01:50,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973907739] [2024-06-21 16:01:50,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:01:50,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:01:50,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:01:50,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:01:50,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:01:50,905 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 16:01:50,906 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 501 places, 649 transitions, 8655 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 16:01:50,906 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:01:50,906 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 16:01:50,906 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:01:51,894 INFO L124 PetriNetUnfolderBase]: 2950/5058 cut-off events. [2024-06-21 16:01:51,894 INFO L125 PetriNetUnfolderBase]: For 690954/690954 co-relation queries the response was YES. [2024-06-21 16:01:51,957 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37334 conditions, 5058 events. 2950/5058 cut-off events. For 690954/690954 co-relation queries the response was YES. Maximal size of possible extension queue 466. Compared 34573 event pairs, 522 based on Foata normal form. 1/5056 useless extension candidates. Maximal degree in co-relation 37130. Up to 4221 conditions per place. [2024-06-21 16:01:51,975 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 456 selfloop transitions, 208 changer transitions 0/672 dead transitions. [2024-06-21 16:01:51,975 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 507 places, 672 transitions, 10863 flow [2024-06-21 16:01:51,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:01:51,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:01:51,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-21 16:01:51,976 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-21 16:01:51,976 INFO L175 Difference]: Start difference. First operand has 501 places, 649 transitions, 8655 flow. Second operand 7 states and 175 transitions. [2024-06-21 16:01:51,976 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 507 places, 672 transitions, 10863 flow [2024-06-21 16:01:56,677 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 503 places, 672 transitions, 10593 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-21 16:01:56,684 INFO L231 Difference]: Finished difference. Result has 504 places, 652 transitions, 8873 flow [2024-06-21 16:01:56,684 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8391, PETRI_DIFFERENCE_MINUEND_PLACES=497, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=649, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=205, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=444, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8873, PETRI_PLACES=504, PETRI_TRANSITIONS=652} [2024-06-21 16:01:56,684 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 462 predicate places. [2024-06-21 16:01:56,684 INFO L495 AbstractCegarLoop]: Abstraction has has 504 places, 652 transitions, 8873 flow [2024-06-21 16:01:56,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 16:01:56,684 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:01:56,684 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:01:56,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172 [2024-06-21 16:01:56,685 INFO L420 AbstractCegarLoop]: === Iteration 174 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:01:56,685 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:01:56,685 INFO L85 PathProgramCache]: Analyzing trace with hash -569927196, now seen corresponding path program 26 times [2024-06-21 16:01:56,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:01:56,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510203064] [2024-06-21 16:01:56,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:01:56,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:01:56,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:01:56,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:01:56,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:01:56,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510203064] [2024-06-21 16:01:56,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510203064] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:01:56,783 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:01:56,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:01:56,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700147738] [2024-06-21 16:01:56,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:01:56,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:01:56,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:01:56,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:01:56,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:01:56,833 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 16:01:56,834 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 504 places, 652 transitions, 8873 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 16:01:56,834 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:01:56,834 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 16:01:56,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:01:57,876 INFO L124 PetriNetUnfolderBase]: 2947/5050 cut-off events. [2024-06-21 16:01:57,876 INFO L125 PetriNetUnfolderBase]: For 683117/683117 co-relation queries the response was YES. [2024-06-21 16:01:57,939 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37346 conditions, 5050 events. 2947/5050 cut-off events. For 683117/683117 co-relation queries the response was YES. Maximal size of possible extension queue 465. Compared 34499 event pairs, 511 based on Foata normal form. 1/5048 useless extension candidates. Maximal degree in co-relation 37142. Up to 4199 conditions per place. [2024-06-21 16:01:57,956 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 480 selfloop transitions, 197 changer transitions 0/685 dead transitions. [2024-06-21 16:01:57,957 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 512 places, 685 transitions, 10829 flow [2024-06-21 16:01:57,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:01:57,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:01:57,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 228 transitions. [2024-06-21 16:01:57,957 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6178861788617886 [2024-06-21 16:01:57,957 INFO L175 Difference]: Start difference. First operand has 504 places, 652 transitions, 8873 flow. Second operand 9 states and 228 transitions. [2024-06-21 16:01:57,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 512 places, 685 transitions, 10829 flow [2024-06-21 16:02:02,723 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 506 places, 685 transitions, 10363 flow, removed 29 selfloop flow, removed 6 redundant places. [2024-06-21 16:02:02,731 INFO L231 Difference]: Finished difference. Result has 507 places, 652 transitions, 8827 flow [2024-06-21 16:02:02,731 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8415, PETRI_DIFFERENCE_MINUEND_PLACES=498, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=652, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=197, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=455, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8827, PETRI_PLACES=507, PETRI_TRANSITIONS=652} [2024-06-21 16:02:02,731 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 465 predicate places. [2024-06-21 16:02:02,731 INFO L495 AbstractCegarLoop]: Abstraction has has 507 places, 652 transitions, 8827 flow [2024-06-21 16:02:02,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 16:02:02,731 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:02:02,731 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:02:02,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173 [2024-06-21 16:02:02,732 INFO L420 AbstractCegarLoop]: === Iteration 175 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:02:02,732 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:02:02,732 INFO L85 PathProgramCache]: Analyzing trace with hash 385569788, now seen corresponding path program 23 times [2024-06-21 16:02:02,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:02:02,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884507599] [2024-06-21 16:02:02,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:02:02,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:02:02,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:02:02,841 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:02:02,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:02:02,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884507599] [2024-06-21 16:02:02,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884507599] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:02:02,841 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:02:02,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:02:02,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035316755] [2024-06-21 16:02:02,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:02:02,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:02:02,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:02:02,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:02:02,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:02:02,881 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 16:02:02,882 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 507 places, 652 transitions, 8827 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 16:02:02,882 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:02:02,882 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 16:02:02,882 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:02:03,921 INFO L124 PetriNetUnfolderBase]: 2944/5056 cut-off events. [2024-06-21 16:02:03,921 INFO L125 PetriNetUnfolderBase]: For 663389/663389 co-relation queries the response was YES. [2024-06-21 16:02:03,987 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37125 conditions, 5056 events. 2944/5056 cut-off events. For 663389/663389 co-relation queries the response was YES. Maximal size of possible extension queue 465. Compared 34498 event pairs, 493 based on Foata normal form. 1/5056 useless extension candidates. Maximal degree in co-relation 36922. Up to 4333 conditions per place. [2024-06-21 16:02:04,004 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 545 selfloop transitions, 130 changer transitions 0/683 dead transitions. [2024-06-21 16:02:04,004 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 514 places, 683 transitions, 10513 flow [2024-06-21 16:02:04,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:02:04,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:02:04,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 206 transitions. [2024-06-21 16:02:04,005 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6280487804878049 [2024-06-21 16:02:04,005 INFO L175 Difference]: Start difference. First operand has 507 places, 652 transitions, 8827 flow. Second operand 8 states and 206 transitions. [2024-06-21 16:02:04,005 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 514 places, 683 transitions, 10513 flow [2024-06-21 16:02:08,257 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 502 places, 683 transitions, 10025 flow, removed 17 selfloop flow, removed 12 redundant places. [2024-06-21 16:02:08,264 INFO L231 Difference]: Finished difference. Result has 503 places, 652 transitions, 8637 flow [2024-06-21 16:02:08,264 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8345, PETRI_DIFFERENCE_MINUEND_PLACES=495, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=652, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=522, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8637, PETRI_PLACES=503, PETRI_TRANSITIONS=652} [2024-06-21 16:02:08,264 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 461 predicate places. [2024-06-21 16:02:08,264 INFO L495 AbstractCegarLoop]: Abstraction has has 503 places, 652 transitions, 8637 flow [2024-06-21 16:02:08,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 16:02:08,265 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:02:08,265 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:02:08,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174 [2024-06-21 16:02:08,265 INFO L420 AbstractCegarLoop]: === Iteration 176 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:02:08,265 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:02:08,265 INFO L85 PathProgramCache]: Analyzing trace with hash -1725897186, now seen corresponding path program 24 times [2024-06-21 16:02:08,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:02:08,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483727017] [2024-06-21 16:02:08,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:02:08,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:02:08,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:02:08,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:02:08,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:02:08,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483727017] [2024-06-21 16:02:08,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483727017] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:02:08,380 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:02:08,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:02:08,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583059783] [2024-06-21 16:02:08,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:02:08,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:02:08,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:02:08,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:02:08,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:02:08,417 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 16:02:08,417 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 503 places, 652 transitions, 8637 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 16:02:08,417 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:02:08,417 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 16:02:08,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:02:09,461 INFO L124 PetriNetUnfolderBase]: 2941/5052 cut-off events. [2024-06-21 16:02:09,462 INFO L125 PetriNetUnfolderBase]: For 635244/635244 co-relation queries the response was YES. [2024-06-21 16:02:09,712 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36607 conditions, 5052 events. 2941/5052 cut-off events. For 635244/635244 co-relation queries the response was YES. Maximal size of possible extension queue 465. Compared 34549 event pairs, 493 based on Foata normal form. 1/5052 useless extension candidates. Maximal degree in co-relation 36406. Up to 4456 conditions per place. [2024-06-21 16:02:09,729 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 619 selfloop transitions, 50 changer transitions 0/677 dead transitions. [2024-06-21 16:02:09,730 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 508 places, 677 transitions, 10039 flow [2024-06-21 16:02:09,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:02:09,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:02:09,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 158 transitions. [2024-06-21 16:02:09,731 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6422764227642277 [2024-06-21 16:02:09,731 INFO L175 Difference]: Start difference. First operand has 503 places, 652 transitions, 8637 flow. Second operand 6 states and 158 transitions. [2024-06-21 16:02:09,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 508 places, 677 transitions, 10039 flow [2024-06-21 16:02:13,961 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 500 places, 677 transitions, 9727 flow, removed 11 selfloop flow, removed 8 redundant places. [2024-06-21 16:02:13,968 INFO L231 Difference]: Finished difference. Result has 501 places, 652 transitions, 8449 flow [2024-06-21 16:02:13,968 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8325, PETRI_DIFFERENCE_MINUEND_PLACES=495, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=652, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=602, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=8449, PETRI_PLACES=501, PETRI_TRANSITIONS=652} [2024-06-21 16:02:13,968 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 459 predicate places. [2024-06-21 16:02:13,968 INFO L495 AbstractCegarLoop]: Abstraction has has 501 places, 652 transitions, 8449 flow [2024-06-21 16:02:13,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 16:02:13,969 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:02:13,969 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:02:13,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175 [2024-06-21 16:02:13,969 INFO L420 AbstractCegarLoop]: === Iteration 177 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:02:13,969 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:02:13,969 INFO L85 PathProgramCache]: Analyzing trace with hash -1207207414, now seen corresponding path program 27 times [2024-06-21 16:02:13,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:02:13,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024310164] [2024-06-21 16:02:13,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:02:13,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:02:13,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:02:14,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:02:14,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:02:14,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024310164] [2024-06-21 16:02:14,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024310164] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:02:14,065 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:02:14,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:02:14,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215650843] [2024-06-21 16:02:14,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:02:14,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:02:14,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:02:14,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:02:14,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:02:14,106 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 16:02:14,106 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 501 places, 652 transitions, 8449 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 16:02:14,106 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:02:14,106 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 16:02:14,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:02:15,154 INFO L124 PetriNetUnfolderBase]: 2938/5042 cut-off events. [2024-06-21 16:02:15,154 INFO L125 PetriNetUnfolderBase]: For 617983/617983 co-relation queries the response was YES. [2024-06-21 16:02:15,217 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36186 conditions, 5042 events. 2938/5042 cut-off events. For 617983/617983 co-relation queries the response was YES. Maximal size of possible extension queue 466. Compared 34486 event pairs, 513 based on Foata normal form. 1/5040 useless extension candidates. Maximal degree in co-relation 35985. Up to 4188 conditions per place. [2024-06-21 16:02:15,235 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 476 selfloop transitions, 204 changer transitions 0/688 dead transitions. [2024-06-21 16:02:15,236 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 510 places, 688 transitions, 10151 flow [2024-06-21 16:02:15,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:02:15,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:02:15,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 247 transitions. [2024-06-21 16:02:15,237 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6024390243902439 [2024-06-21 16:02:15,237 INFO L175 Difference]: Start difference. First operand has 501 places, 652 transitions, 8449 flow. Second operand 10 states and 247 transitions. [2024-06-21 16:02:15,237 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 510 places, 688 transitions, 10151 flow [2024-06-21 16:02:19,587 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 505 places, 688 transitions, 10009 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-21 16:02:19,595 INFO L231 Difference]: Finished difference. Result has 506 places, 652 transitions, 8737 flow [2024-06-21 16:02:19,595 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8307, PETRI_DIFFERENCE_MINUEND_PLACES=496, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=652, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=204, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=448, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8737, PETRI_PLACES=506, PETRI_TRANSITIONS=652} [2024-06-21 16:02:19,596 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 464 predicate places. [2024-06-21 16:02:19,596 INFO L495 AbstractCegarLoop]: Abstraction has has 506 places, 652 transitions, 8737 flow [2024-06-21 16:02:19,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 16:02:19,596 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:02:19,596 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:02:19,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176 [2024-06-21 16:02:19,597 INFO L420 AbstractCegarLoop]: === Iteration 178 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:02:19,597 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:02:19,597 INFO L85 PathProgramCache]: Analyzing trace with hash -12585886, now seen corresponding path program 25 times [2024-06-21 16:02:19,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:02:19,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554437811] [2024-06-21 16:02:19,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:02:19,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:02:19,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:02:19,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:02:19,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:02:19,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554437811] [2024-06-21 16:02:19,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554437811] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:02:19,700 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:02:19,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:02:19,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395945165] [2024-06-21 16:02:19,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:02:19,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:02:19,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:02:19,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:02:19,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:02:19,738 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 16:02:19,738 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 506 places, 652 transitions, 8737 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 16:02:19,738 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:02:19,738 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 16:02:19,738 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:02:20,722 INFO L124 PetriNetUnfolderBase]: 2935/5034 cut-off events. [2024-06-21 16:02:20,723 INFO L125 PetriNetUnfolderBase]: For 620032/620032 co-relation queries the response was YES. [2024-06-21 16:02:20,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36501 conditions, 5034 events. 2935/5034 cut-off events. For 620032/620032 co-relation queries the response was YES. Maximal size of possible extension queue 465. Compared 34413 event pairs, 520 based on Foata normal form. 1/5032 useless extension candidates. Maximal degree in co-relation 36299. Up to 4204 conditions per place. [2024-06-21 16:02:20,800 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 453 selfloop transitions, 212 changer transitions 0/673 dead transitions. [2024-06-21 16:02:20,801 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 512 places, 673 transitions, 10373 flow [2024-06-21 16:02:20,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:02:20,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:02:20,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-21 16:02:20,801 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6132404181184669 [2024-06-21 16:02:20,801 INFO L175 Difference]: Start difference. First operand has 506 places, 652 transitions, 8737 flow. Second operand 7 states and 176 transitions. [2024-06-21 16:02:20,801 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 512 places, 673 transitions, 10373 flow [2024-06-21 16:02:25,532 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 499 places, 673 transitions, 9905 flow, removed 22 selfloop flow, removed 13 redundant places. [2024-06-21 16:02:25,539 INFO L231 Difference]: Finished difference. Result has 500 places, 652 transitions, 8719 flow [2024-06-21 16:02:25,539 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8277, PETRI_DIFFERENCE_MINUEND_PLACES=493, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=652, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=212, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=440, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8719, PETRI_PLACES=500, PETRI_TRANSITIONS=652} [2024-06-21 16:02:25,540 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 458 predicate places. [2024-06-21 16:02:25,540 INFO L495 AbstractCegarLoop]: Abstraction has has 500 places, 652 transitions, 8719 flow [2024-06-21 16:02:25,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 16:02:25,540 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:02:25,540 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:02:25,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177 [2024-06-21 16:02:25,540 INFO L420 AbstractCegarLoop]: === Iteration 179 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:02:25,540 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:02:25,540 INFO L85 PathProgramCache]: Analyzing trace with hash 954864542, now seen corresponding path program 26 times [2024-06-21 16:02:25,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:02:25,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392145741] [2024-06-21 16:02:25,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:02:25,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:02:25,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:02:25,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:02:25,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:02:25,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392145741] [2024-06-21 16:02:25,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392145741] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:02:25,632 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:02:25,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:02:25,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786145566] [2024-06-21 16:02:25,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:02:25,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:02:25,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:02:25,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:02:25,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:02:25,663 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 16:02:25,664 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 500 places, 652 transitions, 8719 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 16:02:25,664 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:02:25,664 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 16:02:25,664 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:02:26,662 INFO L124 PetriNetUnfolderBase]: 2940/5054 cut-off events. [2024-06-21 16:02:26,663 INFO L125 PetriNetUnfolderBase]: For 593424/593426 co-relation queries the response was YES. [2024-06-21 16:02:26,723 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36271 conditions, 5054 events. 2940/5054 cut-off events. For 593424/593426 co-relation queries the response was YES. Maximal size of possible extension queue 466. Compared 34549 event pairs, 502 based on Foata normal form. 3/5056 useless extension candidates. Maximal degree in co-relation 36072. Up to 4210 conditions per place. [2024-06-21 16:02:26,741 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 457 selfloop transitions, 215 changer transitions 0/680 dead transitions. [2024-06-21 16:02:26,741 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 506 places, 680 transitions, 10673 flow [2024-06-21 16:02:26,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:02:26,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:02:26,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-06-21 16:02:26,742 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.627177700348432 [2024-06-21 16:02:26,742 INFO L175 Difference]: Start difference. First operand has 500 places, 652 transitions, 8719 flow. Second operand 7 states and 180 transitions. [2024-06-21 16:02:26,742 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 506 places, 680 transitions, 10673 flow [2024-06-21 16:02:31,279 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 497 places, 680 transitions, 10195 flow, removed 12 selfloop flow, removed 9 redundant places. [2024-06-21 16:02:31,286 INFO L231 Difference]: Finished difference. Result has 498 places, 655 transitions, 8757 flow [2024-06-21 16:02:31,286 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8263, PETRI_DIFFERENCE_MINUEND_PLACES=491, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=652, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=212, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=440, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8757, PETRI_PLACES=498, PETRI_TRANSITIONS=655} [2024-06-21 16:02:31,287 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 456 predicate places. [2024-06-21 16:02:31,287 INFO L495 AbstractCegarLoop]: Abstraction has has 498 places, 655 transitions, 8757 flow [2024-06-21 16:02:31,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 16:02:31,287 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:02:31,287 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:02:31,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable178 [2024-06-21 16:02:31,287 INFO L420 AbstractCegarLoop]: === Iteration 180 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:02:31,288 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:02:31,288 INFO L85 PathProgramCache]: Analyzing trace with hash -1038046296, now seen corresponding path program 28 times [2024-06-21 16:02:31,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:02:31,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491782013] [2024-06-21 16:02:31,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:02:31,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:02:31,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:02:31,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:02:31,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:02:31,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491782013] [2024-06-21 16:02:31,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491782013] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:02:31,393 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:02:31,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:02:31,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228303967] [2024-06-21 16:02:31,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:02:31,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:02:31,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:02:31,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:02:31,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:02:31,424 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 16:02:31,424 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 498 places, 655 transitions, 8757 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 16:02:31,424 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:02:31,424 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 16:02:31,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:02:32,422 INFO L124 PetriNetUnfolderBase]: 2937/5050 cut-off events. [2024-06-21 16:02:32,422 INFO L125 PetriNetUnfolderBase]: For 559620/559622 co-relation queries the response was YES. [2024-06-21 16:02:32,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35907 conditions, 5050 events. 2937/5050 cut-off events. For 559620/559622 co-relation queries the response was YES. Maximal size of possible extension queue 466. Compared 34507 event pairs, 498 based on Foata normal form. 3/5052 useless extension candidates. Maximal degree in co-relation 35710. Up to 4188 conditions per place. [2024-06-21 16:02:32,498 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 490 selfloop transitions, 201 changer transitions 0/699 dead transitions. [2024-06-21 16:02:32,499 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 508 places, 699 transitions, 10733 flow [2024-06-21 16:02:32,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:02:32,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:02:32,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 274 transitions. [2024-06-21 16:02:32,499 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6075388026607539 [2024-06-21 16:02:32,499 INFO L175 Difference]: Start difference. First operand has 498 places, 655 transitions, 8757 flow. Second operand 11 states and 274 transitions. [2024-06-21 16:02:32,499 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 508 places, 699 transitions, 10733 flow [2024-06-21 16:02:36,502 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 500 places, 699 transitions, 10275 flow, removed 35 selfloop flow, removed 8 redundant places. [2024-06-21 16:02:36,510 INFO L231 Difference]: Finished difference. Result has 501 places, 655 transitions, 8735 flow [2024-06-21 16:02:36,511 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8311, PETRI_DIFFERENCE_MINUEND_PLACES=490, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=655, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=201, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=454, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8735, PETRI_PLACES=501, PETRI_TRANSITIONS=655} [2024-06-21 16:02:36,511 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 459 predicate places. [2024-06-21 16:02:36,511 INFO L495 AbstractCegarLoop]: Abstraction has has 501 places, 655 transitions, 8735 flow [2024-06-21 16:02:36,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 16:02:36,512 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:02:36,512 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:02:36,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable179 [2024-06-21 16:02:36,512 INFO L420 AbstractCegarLoop]: === Iteration 181 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:02:36,512 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:02:36,512 INFO L85 PathProgramCache]: Analyzing trace with hash -1037660160, now seen corresponding path program 27 times [2024-06-21 16:02:36,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:02:36,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842401574] [2024-06-21 16:02:36,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:02:36,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:02:36,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:02:36,605 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:02:36,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:02:36,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842401574] [2024-06-21 16:02:36,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842401574] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:02:36,606 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:02:36,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:02:36,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741859237] [2024-06-21 16:02:36,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:02:36,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:02:36,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:02:36,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:02:36,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:02:36,643 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 16:02:36,643 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 501 places, 655 transitions, 8735 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 16:02:36,643 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:02:36,643 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 16:02:36,643 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:02:37,613 INFO L124 PetriNetUnfolderBase]: 2934/5050 cut-off events. [2024-06-21 16:02:37,613 INFO L125 PetriNetUnfolderBase]: For 535245/535247 co-relation queries the response was YES. [2024-06-21 16:02:37,672 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35641 conditions, 5050 events. 2934/5050 cut-off events. For 535245/535247 co-relation queries the response was YES. Maximal size of possible extension queue 467. Compared 34622 event pairs, 504 based on Foata normal form. 3/5052 useless extension candidates. Maximal degree in co-relation 35447. Up to 4203 conditions per place. [2024-06-21 16:02:37,689 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 454 selfloop transitions, 215 changer transitions 0/677 dead transitions. [2024-06-21 16:02:37,689 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 507 places, 677 transitions, 10603 flow [2024-06-21 16:02:37,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:02:37,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:02:37,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-21 16:02:37,690 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6132404181184669 [2024-06-21 16:02:37,690 INFO L175 Difference]: Start difference. First operand has 501 places, 655 transitions, 8735 flow. Second operand 7 states and 176 transitions. [2024-06-21 16:02:37,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 507 places, 677 transitions, 10603 flow [2024-06-21 16:02:41,385 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 493 places, 677 transitions, 10075 flow, removed 23 selfloop flow, removed 14 redundant places. [2024-06-21 16:02:41,392 INFO L231 Difference]: Finished difference. Result has 494 places, 655 transitions, 8667 flow [2024-06-21 16:02:41,392 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8223, PETRI_DIFFERENCE_MINUEND_PLACES=487, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=655, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=215, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=440, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8667, PETRI_PLACES=494, PETRI_TRANSITIONS=655} [2024-06-21 16:02:41,392 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 452 predicate places. [2024-06-21 16:02:41,392 INFO L495 AbstractCegarLoop]: Abstraction has has 494 places, 655 transitions, 8667 flow [2024-06-21 16:02:41,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 16:02:41,392 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:02:41,392 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:02:41,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180 [2024-06-21 16:02:41,393 INFO L420 AbstractCegarLoop]: === Iteration 182 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:02:41,393 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:02:41,393 INFO L85 PathProgramCache]: Analyzing trace with hash -814520610, now seen corresponding path program 28 times [2024-06-21 16:02:41,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:02:41,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066920843] [2024-06-21 16:02:41,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:02:41,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:02:41,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:02:41,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:02:41,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:02:41,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066920843] [2024-06-21 16:02:41,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066920843] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:02:41,502 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:02:41,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:02:41,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109444457] [2024-06-21 16:02:41,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:02:41,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:02:41,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:02:41,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:02:41,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:02:41,572 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 16:02:41,572 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 494 places, 655 transitions, 8667 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 16:02:41,572 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:02:41,572 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 16:02:41,572 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:02:42,522 INFO L124 PetriNetUnfolderBase]: 2944/5065 cut-off events. [2024-06-21 16:02:42,522 INFO L125 PetriNetUnfolderBase]: For 510275/510275 co-relation queries the response was YES. [2024-06-21 16:02:42,580 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35449 conditions, 5065 events. 2944/5065 cut-off events. For 510275/510275 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 34608 event pairs, 495 based on Foata normal form. 1/5065 useless extension candidates. Maximal degree in co-relation 35257. Up to 4458 conditions per place. [2024-06-21 16:02:42,597 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 614 selfloop transitions, 56 changer transitions 0/678 dead transitions. [2024-06-21 16:02:42,597 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 500 places, 678 transitions, 10156 flow [2024-06-21 16:02:42,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:02:42,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:02:42,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2024-06-21 16:02:42,598 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.578397212543554 [2024-06-21 16:02:42,598 INFO L175 Difference]: Start difference. First operand has 494 places, 655 transitions, 8667 flow. Second operand 7 states and 166 transitions. [2024-06-21 16:02:42,598 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 500 places, 678 transitions, 10156 flow [2024-06-21 16:02:46,465 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 491 places, 678 transitions, 9598 flow, removed 5 selfloop flow, removed 9 redundant places. [2024-06-21 16:02:46,472 INFO L231 Difference]: Finished difference. Result has 492 places, 661 transitions, 8344 flow [2024-06-21 16:02:46,472 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8124, PETRI_DIFFERENCE_MINUEND_PLACES=485, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=655, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=602, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8344, PETRI_PLACES=492, PETRI_TRANSITIONS=661} [2024-06-21 16:02:46,472 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 450 predicate places. [2024-06-21 16:02:46,472 INFO L495 AbstractCegarLoop]: Abstraction has has 492 places, 661 transitions, 8344 flow [2024-06-21 16:02:46,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 16:02:46,472 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:02:46,473 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:02:46,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181 [2024-06-21 16:02:46,473 INFO L420 AbstractCegarLoop]: === Iteration 183 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:02:46,473 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:02:46,473 INFO L85 PathProgramCache]: Analyzing trace with hash 1440733810, now seen corresponding path program 29 times [2024-06-21 16:02:46,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:02:46,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701529964] [2024-06-21 16:02:46,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:02:46,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:02:46,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:02:46,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:02:46,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:02:46,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701529964] [2024-06-21 16:02:46,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701529964] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:02:46,568 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:02:46,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:02:46,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044290423] [2024-06-21 16:02:46,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:02:46,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:02:46,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:02:46,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:02:46,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:02:46,605 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 16:02:46,606 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 492 places, 661 transitions, 8344 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 16:02:46,606 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:02:46,606 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 16:02:46,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:02:47,561 INFO L124 PetriNetUnfolderBase]: 2941/5062 cut-off events. [2024-06-21 16:02:47,561 INFO L125 PetriNetUnfolderBase]: For 494183/494185 co-relation queries the response was YES. [2024-06-21 16:02:47,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34829 conditions, 5062 events. 2941/5062 cut-off events. For 494183/494185 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 34654 event pairs, 500 based on Foata normal form. 3/5064 useless extension candidates. Maximal degree in co-relation 34639. Up to 4195 conditions per place. [2024-06-21 16:02:47,637 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 491 selfloop transitions, 197 changer transitions 0/696 dead transitions. [2024-06-21 16:02:47,637 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 500 places, 696 transitions, 10038 flow [2024-06-21 16:02:47,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:02:47,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:02:47,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 227 transitions. [2024-06-21 16:02:47,637 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6151761517615176 [2024-06-21 16:02:47,638 INFO L175 Difference]: Start difference. First operand has 492 places, 661 transitions, 8344 flow. Second operand 9 states and 227 transitions. [2024-06-21 16:02:47,638 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 500 places, 696 transitions, 10038 flow [2024-06-21 16:02:50,687 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 495 places, 696 transitions, 9890 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-21 16:02:50,694 INFO L231 Difference]: Finished difference. Result has 496 places, 661 transitions, 8610 flow [2024-06-21 16:02:50,694 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8198, PETRI_DIFFERENCE_MINUEND_PLACES=487, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=661, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=197, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=464, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8610, PETRI_PLACES=496, PETRI_TRANSITIONS=661} [2024-06-21 16:02:50,694 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 454 predicate places. [2024-06-21 16:02:50,695 INFO L495 AbstractCegarLoop]: Abstraction has has 496 places, 661 transitions, 8610 flow [2024-06-21 16:02:50,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 16:02:50,695 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:02:50,695 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:02:50,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182 [2024-06-21 16:02:50,695 INFO L420 AbstractCegarLoop]: === Iteration 184 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:02:50,695 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:02:50,695 INFO L85 PathProgramCache]: Analyzing trace with hash -1185655710, now seen corresponding path program 29 times [2024-06-21 16:02:50,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:02:50,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112683823] [2024-06-21 16:02:50,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:02:50,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:02:50,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:02:50,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:02:50,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:02:50,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112683823] [2024-06-21 16:02:50,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112683823] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:02:50,793 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:02:50,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:02:50,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056632185] [2024-06-21 16:02:50,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:02:50,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:02:50,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:02:50,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:02:50,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:02:50,841 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 16:02:50,842 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 496 places, 661 transitions, 8610 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 16:02:50,842 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:02:50,842 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 16:02:50,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:02:51,916 INFO L124 PetriNetUnfolderBase]: 2938/5053 cut-off events. [2024-06-21 16:02:51,916 INFO L125 PetriNetUnfolderBase]: For 487911/487911 co-relation queries the response was YES. [2024-06-21 16:02:51,976 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35042 conditions, 5053 events. 2938/5053 cut-off events. For 487911/487911 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 34562 event pairs, 493 based on Foata normal form. 1/5053 useless extension candidates. Maximal degree in co-relation 34852. Up to 4404 conditions per place. [2024-06-21 16:02:51,994 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 587 selfloop transitions, 93 changer transitions 0/688 dead transitions. [2024-06-21 16:02:51,994 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 502 places, 688 transitions, 10268 flow [2024-06-21 16:02:51,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:02:51,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:02:51,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-21 16:02:51,995 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6202090592334495 [2024-06-21 16:02:51,995 INFO L175 Difference]: Start difference. First operand has 496 places, 661 transitions, 8610 flow. Second operand 7 states and 178 transitions. [2024-06-21 16:02:51,996 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 502 places, 688 transitions, 10268 flow [2024-06-21 16:02:54,924 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 493 places, 688 transitions, 9836 flow, removed 17 selfloop flow, removed 9 redundant places. [2024-06-21 16:02:54,931 INFO L231 Difference]: Finished difference. Result has 494 places, 661 transitions, 8388 flow [2024-06-21 16:02:54,931 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8184, PETRI_DIFFERENCE_MINUEND_PLACES=487, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=661, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=568, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8388, PETRI_PLACES=494, PETRI_TRANSITIONS=661} [2024-06-21 16:02:54,931 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 452 predicate places. [2024-06-21 16:02:54,931 INFO L495 AbstractCegarLoop]: Abstraction has has 494 places, 661 transitions, 8388 flow [2024-06-21 16:02:54,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 16:02:54,932 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:02:54,932 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:02:54,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183 [2024-06-21 16:02:54,932 INFO L420 AbstractCegarLoop]: === Iteration 185 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:02:54,932 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:02:54,932 INFO L85 PathProgramCache]: Analyzing trace with hash 1292916820, now seen corresponding path program 30 times [2024-06-21 16:02:54,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:02:54,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021988589] [2024-06-21 16:02:54,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:02:54,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:02:54,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:02:55,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:02:55,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:02:55,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021988589] [2024-06-21 16:02:55,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021988589] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:02:55,035 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:02:55,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:02:55,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555541043] [2024-06-21 16:02:55,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:02:55,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:02:55,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:02:55,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:02:55,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:02:55,087 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 16:02:55,088 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 494 places, 661 transitions, 8388 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 16:02:55,088 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:02:55,088 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 16:02:55,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:02:56,044 INFO L124 PetriNetUnfolderBase]: 2935/5053 cut-off events. [2024-06-21 16:02:56,044 INFO L125 PetriNetUnfolderBase]: For 465279/465279 co-relation queries the response was YES. [2024-06-21 16:02:56,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34478 conditions, 5053 events. 2935/5053 cut-off events. For 465279/465279 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 34602 event pairs, 494 based on Foata normal form. 1/5053 useless extension candidates. Maximal degree in co-relation 34288. Up to 4446 conditions per place. [2024-06-21 16:02:56,119 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 633 selfloop transitions, 49 changer transitions 0/690 dead transitions. [2024-06-21 16:02:56,119 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 500 places, 690 transitions, 9826 flow [2024-06-21 16:02:56,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:02:56,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:02:56,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-21 16:02:56,120 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6167247386759582 [2024-06-21 16:02:56,120 INFO L175 Difference]: Start difference. First operand has 494 places, 661 transitions, 8388 flow. Second operand 7 states and 177 transitions. [2024-06-21 16:02:56,120 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 500 places, 690 transitions, 9826 flow [2024-06-21 16:02:59,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 493 places, 690 transitions, 9640 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-21 16:02:59,117 INFO L231 Difference]: Finished difference. Result has 494 places, 661 transitions, 8318 flow [2024-06-21 16:02:59,117 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8202, PETRI_DIFFERENCE_MINUEND_PLACES=487, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=661, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=612, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8318, PETRI_PLACES=494, PETRI_TRANSITIONS=661} [2024-06-21 16:02:59,117 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 452 predicate places. [2024-06-21 16:02:59,117 INFO L495 AbstractCegarLoop]: Abstraction has has 494 places, 661 transitions, 8318 flow [2024-06-21 16:02:59,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 16:02:59,117 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:02:59,117 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:02:59,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184 [2024-06-21 16:02:59,118 INFO L420 AbstractCegarLoop]: === Iteration 186 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:02:59,118 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:02:59,118 INFO L85 PathProgramCache]: Analyzing trace with hash -1185418560, now seen corresponding path program 30 times [2024-06-21 16:02:59,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:02:59,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541685866] [2024-06-21 16:02:59,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:02:59,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:02:59,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:02:59,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:02:59,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:02:59,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541685866] [2024-06-21 16:02:59,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541685866] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:02:59,220 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:02:59,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:02:59,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78456355] [2024-06-21 16:02:59,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:02:59,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:02:59,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:02:59,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:02:59,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:02:59,257 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 16:02:59,257 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 494 places, 661 transitions, 8318 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 16:02:59,257 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:02:59,257 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 16:02:59,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:03:00,222 INFO L124 PetriNetUnfolderBase]: 2932/5045 cut-off events. [2024-06-21 16:03:00,222 INFO L125 PetriNetUnfolderBase]: For 444191/444191 co-relation queries the response was YES. [2024-06-21 16:03:00,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34135 conditions, 5045 events. 2932/5045 cut-off events. For 444191/444191 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 34514 event pairs, 493 based on Foata normal form. 1/5045 useless extension candidates. Maximal degree in co-relation 33947. Up to 4397 conditions per place. [2024-06-21 16:03:00,297 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 585 selfloop transitions, 96 changer transitions 0/689 dead transitions. [2024-06-21 16:03:00,297 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 502 places, 689 transitions, 9750 flow [2024-06-21 16:03:00,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:03:00,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:03:00,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 215 transitions. [2024-06-21 16:03:00,298 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5826558265582655 [2024-06-21 16:03:00,298 INFO L175 Difference]: Start difference. First operand has 494 places, 661 transitions, 8318 flow. Second operand 9 states and 215 transitions. [2024-06-21 16:03:00,298 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 502 places, 689 transitions, 9750 flow [2024-06-21 16:03:03,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 496 places, 689 transitions, 9616 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-21 16:03:03,058 INFO L231 Difference]: Finished difference. Result has 497 places, 661 transitions, 8390 flow [2024-06-21 16:03:03,058 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8184, PETRI_DIFFERENCE_MINUEND_PLACES=488, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=661, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=565, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8390, PETRI_PLACES=497, PETRI_TRANSITIONS=661} [2024-06-21 16:03:03,058 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 455 predicate places. [2024-06-21 16:03:03,059 INFO L495 AbstractCegarLoop]: Abstraction has has 497 places, 661 transitions, 8390 flow [2024-06-21 16:03:03,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 16:03:03,059 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:03:03,059 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:03:03,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185 [2024-06-21 16:03:03,059 INFO L420 AbstractCegarLoop]: === Iteration 187 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:03:03,059 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:03:03,059 INFO L85 PathProgramCache]: Analyzing trace with hash -1185747966, now seen corresponding path program 4 times [2024-06-21 16:03:03,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:03:03,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609676348] [2024-06-21 16:03:03,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:03:03,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:03:03,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:03:03,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:03:03,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:03:03,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609676348] [2024-06-21 16:03:03,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609676348] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:03:03,160 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:03:03,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:03:03,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71001697] [2024-06-21 16:03:03,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:03:03,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:03:03,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:03:03,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:03:03,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:03:03,202 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 16:03:03,202 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 497 places, 661 transitions, 8390 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 16:03:03,203 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:03:03,203 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 16:03:03,203 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:03:04,123 INFO L124 PetriNetUnfolderBase]: 2919/5026 cut-off events. [2024-06-21 16:03:04,123 INFO L125 PetriNetUnfolderBase]: For 431039/431039 co-relation queries the response was YES. [2024-06-21 16:03:04,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33369 conditions, 5026 events. 2919/5026 cut-off events. For 431039/431039 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 34362 event pairs, 395 based on Foata normal form. 6/5031 useless extension candidates. Maximal degree in co-relation 33180. Up to 4141 conditions per place. [2024-06-21 16:03:04,197 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 620 selfloop transitions, 66 changer transitions 0/694 dead transitions. [2024-06-21 16:03:04,198 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 503 places, 694 transitions, 9888 flow [2024-06-21 16:03:04,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:03:04,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:03:04,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-06-21 16:03:04,198 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.627177700348432 [2024-06-21 16:03:04,198 INFO L175 Difference]: Start difference. First operand has 497 places, 661 transitions, 8390 flow. Second operand 7 states and 180 transitions. [2024-06-21 16:03:04,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 503 places, 694 transitions, 9888 flow [2024-06-21 16:03:07,260 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 493 places, 694 transitions, 9628 flow, removed 7 selfloop flow, removed 10 redundant places. [2024-06-21 16:03:07,267 INFO L231 Difference]: Finished difference. Result has 494 places, 661 transitions, 8272 flow [2024-06-21 16:03:07,268 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8130, PETRI_DIFFERENCE_MINUEND_PLACES=487, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=661, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=595, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8272, PETRI_PLACES=494, PETRI_TRANSITIONS=661} [2024-06-21 16:03:07,268 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 452 predicate places. [2024-06-21 16:03:07,268 INFO L495 AbstractCegarLoop]: Abstraction has has 494 places, 661 transitions, 8272 flow [2024-06-21 16:03:07,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 16:03:07,269 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:03:07,269 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:03:07,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186 [2024-06-21 16:03:07,269 INFO L420 AbstractCegarLoop]: === Iteration 188 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:03:07,269 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:03:07,269 INFO L85 PathProgramCache]: Analyzing trace with hash 2118502372, now seen corresponding path program 5 times [2024-06-21 16:03:07,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:03:07,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645860881] [2024-06-21 16:03:07,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:03:07,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:03:07,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:03:07,384 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:03:07,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:03:07,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645860881] [2024-06-21 16:03:07,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645860881] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:03:07,384 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:03:07,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:03:07,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404755140] [2024-06-21 16:03:07,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:03:07,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:03:07,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:03:07,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:03:07,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:03:07,419 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 16:03:07,419 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 494 places, 661 transitions, 8272 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 16:03:07,419 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:03:07,419 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 16:03:07,419 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:03:08,334 INFO L124 PetriNetUnfolderBase]: 2940/5047 cut-off events. [2024-06-21 16:03:08,334 INFO L125 PetriNetUnfolderBase]: For 414809/414809 co-relation queries the response was YES. [2024-06-21 16:03:08,394 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33864 conditions, 5047 events. 2940/5047 cut-off events. For 414809/414809 co-relation queries the response was YES. Maximal size of possible extension queue 475. Compared 34524 event pairs, 490 based on Foata normal form. 2/5047 useless extension candidates. Maximal degree in co-relation 33676. Up to 4341 conditions per place. [2024-06-21 16:03:08,411 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 586 selfloop transitions, 98 changer transitions 0/692 dead transitions. [2024-06-21 16:03:08,412 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 501 places, 692 transitions, 10032 flow [2024-06-21 16:03:08,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:03:08,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:03:08,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-21 16:03:08,417 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5914634146341463 [2024-06-21 16:03:08,417 INFO L175 Difference]: Start difference. First operand has 494 places, 661 transitions, 8272 flow. Second operand 8 states and 194 transitions. [2024-06-21 16:03:08,417 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 501 places, 692 transitions, 10032 flow [2024-06-21 16:03:11,212 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 496 places, 692 transitions, 9915 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-21 16:03:11,219 INFO L231 Difference]: Finished difference. Result has 497 places, 665 transitions, 8474 flow [2024-06-21 16:03:11,219 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8161, PETRI_DIFFERENCE_MINUEND_PLACES=489, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=661, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=565, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8474, PETRI_PLACES=497, PETRI_TRANSITIONS=665} [2024-06-21 16:03:11,219 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 455 predicate places. [2024-06-21 16:03:11,219 INFO L495 AbstractCegarLoop]: Abstraction has has 497 places, 665 transitions, 8474 flow [2024-06-21 16:03:11,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 16:03:11,220 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:03:11,220 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:03:11,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187 [2024-06-21 16:03:11,220 INFO L420 AbstractCegarLoop]: === Iteration 189 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:03:11,220 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:03:11,220 INFO L85 PathProgramCache]: Analyzing trace with hash -1137417184, now seen corresponding path program 6 times [2024-06-21 16:03:11,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:03:11,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140844374] [2024-06-21 16:03:11,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:03:11,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:03:11,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:03:11,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:03:11,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:03:11,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140844374] [2024-06-21 16:03:11,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140844374] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:03:11,329 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:03:11,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:03:11,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909069711] [2024-06-21 16:03:11,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:03:11,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:03:11,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:03:11,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:03:11,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:03:11,371 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 16:03:11,372 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 497 places, 665 transitions, 8474 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 16:03:11,372 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:03:11,372 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 16:03:11,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:03:12,275 INFO L124 PetriNetUnfolderBase]: 2948/5068 cut-off events. [2024-06-21 16:03:12,275 INFO L125 PetriNetUnfolderBase]: For 402868/402868 co-relation queries the response was YES. [2024-06-21 16:03:12,334 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33969 conditions, 5068 events. 2948/5068 cut-off events. For 402868/402868 co-relation queries the response was YES. Maximal size of possible extension queue 478. Compared 34784 event pairs, 499 based on Foata normal form. 2/5068 useless extension candidates. Maximal degree in co-relation 33781. Up to 4388 conditions per place. [2024-06-21 16:03:12,351 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 586 selfloop transitions, 95 changer transitions 0/689 dead transitions. [2024-06-21 16:03:12,351 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 504 places, 689 transitions, 9948 flow [2024-06-21 16:03:12,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:03:12,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:03:12,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 189 transitions. [2024-06-21 16:03:12,352 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5762195121951219 [2024-06-21 16:03:12,352 INFO L175 Difference]: Start difference. First operand has 497 places, 665 transitions, 8474 flow. Second operand 8 states and 189 transitions. [2024-06-21 16:03:12,352 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 504 places, 689 transitions, 9948 flow [2024-06-21 16:03:15,145 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 500 places, 689 transitions, 9730 flow, removed 53 selfloop flow, removed 4 redundant places. [2024-06-21 16:03:15,152 INFO L231 Difference]: Finished difference. Result has 501 places, 667 transitions, 8513 flow [2024-06-21 16:03:15,152 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8284, PETRI_DIFFERENCE_MINUEND_PLACES=493, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=665, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=570, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8513, PETRI_PLACES=501, PETRI_TRANSITIONS=667} [2024-06-21 16:03:15,152 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 459 predicate places. [2024-06-21 16:03:15,153 INFO L495 AbstractCegarLoop]: Abstraction has has 501 places, 667 transitions, 8513 flow [2024-06-21 16:03:15,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 16:03:15,153 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:03:15,153 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:03:15,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable188 [2024-06-21 16:03:15,153 INFO L420 AbstractCegarLoop]: === Iteration 190 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:03:15,153 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:03:15,153 INFO L85 PathProgramCache]: Analyzing trace with hash 1470838914, now seen corresponding path program 7 times [2024-06-21 16:03:15,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:03:15,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626019014] [2024-06-21 16:03:15,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:03:15,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:03:15,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:03:15,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:03:15,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:03:15,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626019014] [2024-06-21 16:03:15,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626019014] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:03:15,252 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:03:15,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:03:15,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40327776] [2024-06-21 16:03:15,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:03:15,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:03:15,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:03:15,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:03:15,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:03:15,290 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 16:03:15,291 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 501 places, 667 transitions, 8513 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 16:03:15,291 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:03:15,291 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 16:03:15,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:03:16,209 INFO L124 PetriNetUnfolderBase]: 2969/5094 cut-off events. [2024-06-21 16:03:16,209 INFO L125 PetriNetUnfolderBase]: For 421095/421095 co-relation queries the response was YES. [2024-06-21 16:03:16,270 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34540 conditions, 5094 events. 2969/5094 cut-off events. For 421095/421095 co-relation queries the response was YES. Maximal size of possible extension queue 483. Compared 34842 event pairs, 495 based on Foata normal form. 2/5094 useless extension candidates. Maximal degree in co-relation 34350. Up to 4384 conditions per place. [2024-06-21 16:03:16,286 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 596 selfloop transitions, 94 changer transitions 0/698 dead transitions. [2024-06-21 16:03:16,286 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 508 places, 698 transitions, 10291 flow [2024-06-21 16:03:16,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:03:16,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:03:16,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 195 transitions. [2024-06-21 16:03:16,286 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5945121951219512 [2024-06-21 16:03:16,287 INFO L175 Difference]: Start difference. First operand has 501 places, 667 transitions, 8513 flow. Second operand 8 states and 195 transitions. [2024-06-21 16:03:16,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 508 places, 698 transitions, 10291 flow [2024-06-21 16:03:19,211 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 502 places, 698 transitions, 10082 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-21 16:03:19,219 INFO L231 Difference]: Finished difference. Result has 503 places, 671 transitions, 8617 flow [2024-06-21 16:03:19,219 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8304, PETRI_DIFFERENCE_MINUEND_PLACES=495, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=667, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=575, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8617, PETRI_PLACES=503, PETRI_TRANSITIONS=671} [2024-06-21 16:03:19,219 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 461 predicate places. [2024-06-21 16:03:19,219 INFO L495 AbstractCegarLoop]: Abstraction has has 503 places, 671 transitions, 8617 flow [2024-06-21 16:03:19,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 16:03:19,219 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:03:19,219 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:03:19,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable189 [2024-06-21 16:03:19,220 INFO L420 AbstractCegarLoop]: === Iteration 191 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:03:19,220 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:03:19,220 INFO L85 PathProgramCache]: Analyzing trace with hash 1473695874, now seen corresponding path program 8 times [2024-06-21 16:03:19,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:03:19,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008304620] [2024-06-21 16:03:19,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:03:19,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:03:19,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:03:19,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:03:19,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:03:19,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008304620] [2024-06-21 16:03:19,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008304620] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:03:19,327 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:03:19,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:03:19,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31895393] [2024-06-21 16:03:19,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:03:19,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:03:19,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:03:19,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:03:19,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:03:19,360 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 16:03:19,361 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 503 places, 671 transitions, 8617 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 16:03:19,361 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:03:19,361 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 16:03:19,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:03:20,483 INFO L124 PetriNetUnfolderBase]: 2977/5111 cut-off events. [2024-06-21 16:03:20,483 INFO L125 PetriNetUnfolderBase]: For 429872/429872 co-relation queries the response was YES. [2024-06-21 16:03:20,536 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34822 conditions, 5111 events. 2977/5111 cut-off events. For 429872/429872 co-relation queries the response was YES. Maximal size of possible extension queue 484. Compared 35030 event pairs, 502 based on Foata normal form. 2/5111 useless extension candidates. Maximal degree in co-relation 34631. Up to 4431 conditions per place. [2024-06-21 16:03:20,551 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 596 selfloop transitions, 91 changer transitions 0/695 dead transitions. [2024-06-21 16:03:20,551 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 510 places, 695 transitions, 10107 flow [2024-06-21 16:03:20,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:03:20,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:03:20,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 190 transitions. [2024-06-21 16:03:20,552 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5792682926829268 [2024-06-21 16:03:20,552 INFO L175 Difference]: Start difference. First operand has 503 places, 671 transitions, 8617 flow. Second operand 8 states and 190 transitions. [2024-06-21 16:03:20,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 510 places, 695 transitions, 10107 flow [2024-06-21 16:03:23,798 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 506 places, 695 transitions, 9885 flow, removed 59 selfloop flow, removed 4 redundant places. [2024-06-21 16:03:23,805 INFO L231 Difference]: Finished difference. Result has 507 places, 673 transitions, 8648 flow [2024-06-21 16:03:23,805 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8427, PETRI_DIFFERENCE_MINUEND_PLACES=499, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=671, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=580, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8648, PETRI_PLACES=507, PETRI_TRANSITIONS=673} [2024-06-21 16:03:23,806 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 465 predicate places. [2024-06-21 16:03:23,806 INFO L495 AbstractCegarLoop]: Abstraction has has 507 places, 673 transitions, 8648 flow [2024-06-21 16:03:23,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 16:03:23,806 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:03:23,806 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:03:23,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable190 [2024-06-21 16:03:23,807 INFO L420 AbstractCegarLoop]: === Iteration 192 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:03:23,807 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:03:23,807 INFO L85 PathProgramCache]: Analyzing trace with hash -578413536, now seen corresponding path program 9 times [2024-06-21 16:03:23,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:03:23,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301795913] [2024-06-21 16:03:23,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:03:23,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:03:23,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:03:23,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:03:23,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:03:23,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301795913] [2024-06-21 16:03:23,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301795913] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:03:23,918 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:03:23,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:03:23,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202354455] [2024-06-21 16:03:23,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:03:23,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:03:23,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:03:23,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:03:23,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:03:23,981 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 16:03:23,981 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 507 places, 673 transitions, 8648 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 16:03:23,981 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:03:23,981 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 16:03:23,982 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:03:24,963 INFO L124 PetriNetUnfolderBase]: 2985/5135 cut-off events. [2024-06-21 16:03:24,963 INFO L125 PetriNetUnfolderBase]: For 435738/435738 co-relation queries the response was YES. [2024-06-21 16:03:25,026 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34976 conditions, 5135 events. 2985/5135 cut-off events. For 435738/435738 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 35287 event pairs, 401 based on Foata normal form. 2/5135 useless extension candidates. Maximal degree in co-relation 34783. Up to 4208 conditions per place. [2024-06-21 16:03:25,046 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 578 selfloop transitions, 125 changer transitions 0/711 dead transitions. [2024-06-21 16:03:25,046 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 514 places, 711 transitions, 10772 flow [2024-06-21 16:03:25,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:03:25,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:03:25,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-21 16:03:25,047 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5975609756097561 [2024-06-21 16:03:25,047 INFO L175 Difference]: Start difference. First operand has 507 places, 673 transitions, 8648 flow. Second operand 8 states and 196 transitions. [2024-06-21 16:03:25,047 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 514 places, 711 transitions, 10772 flow [2024-06-21 16:03:27,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 508 places, 711 transitions, 10571 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-21 16:03:27,688 INFO L231 Difference]: Finished difference. Result has 510 places, 682 transitions, 8972 flow [2024-06-21 16:03:27,688 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8447, PETRI_DIFFERENCE_MINUEND_PLACES=501, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=673, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=551, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8972, PETRI_PLACES=510, PETRI_TRANSITIONS=682} [2024-06-21 16:03:27,688 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 468 predicate places. [2024-06-21 16:03:27,688 INFO L495 AbstractCegarLoop]: Abstraction has has 510 places, 682 transitions, 8972 flow [2024-06-21 16:03:27,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 16:03:27,689 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:03:27,689 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:03:27,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191 [2024-06-21 16:03:27,689 INFO L420 AbstractCegarLoop]: === Iteration 193 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:03:27,689 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:03:27,690 INFO L85 PathProgramCache]: Analyzing trace with hash -1917818904, now seen corresponding path program 10 times [2024-06-21 16:03:27,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:03:27,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575283899] [2024-06-21 16:03:27,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:03:27,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:03:27,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:03:27,791 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:03:27,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:03:27,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575283899] [2024-06-21 16:03:27,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575283899] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:03:27,791 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:03:27,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:03:27,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987089189] [2024-06-21 16:03:27,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:03:27,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:03:27,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:03:27,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:03:27,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:03:27,830 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 16:03:27,830 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 510 places, 682 transitions, 8972 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 16:03:27,830 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:03:27,830 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 16:03:27,831 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:03:28,877 INFO L124 PetriNetUnfolderBase]: 2993/5149 cut-off events. [2024-06-21 16:03:28,878 INFO L125 PetriNetUnfolderBase]: For 444939/444939 co-relation queries the response was YES. [2024-06-21 16:03:28,939 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35647 conditions, 5149 events. 2993/5149 cut-off events. For 444939/444939 co-relation queries the response was YES. Maximal size of possible extension queue 489. Compared 35418 event pairs, 403 based on Foata normal form. 2/5149 useless extension candidates. Maximal degree in co-relation 35452. Up to 4216 conditions per place. [2024-06-21 16:03:28,958 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 574 selfloop transitions, 128 changer transitions 0/710 dead transitions. [2024-06-21 16:03:28,958 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 517 places, 710 transitions, 10755 flow [2024-06-21 16:03:28,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:03:28,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:03:28,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-06-21 16:03:28,959 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-21 16:03:28,959 INFO L175 Difference]: Start difference. First operand has 510 places, 682 transitions, 8972 flow. Second operand 8 states and 192 transitions. [2024-06-21 16:03:28,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 517 places, 710 transitions, 10755 flow [2024-06-21 16:03:31,384 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 514 places, 710 transitions, 10471 flow, removed 90 selfloop flow, removed 3 redundant places. [2024-06-21 16:03:31,392 INFO L231 Difference]: Finished difference. Result has 515 places, 685 transitions, 9046 flow [2024-06-21 16:03:31,393 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8736, PETRI_DIFFERENCE_MINUEND_PLACES=507, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=682, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=557, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9046, PETRI_PLACES=515, PETRI_TRANSITIONS=685} [2024-06-21 16:03:31,393 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 473 predicate places. [2024-06-21 16:03:31,393 INFO L495 AbstractCegarLoop]: Abstraction has has 515 places, 685 transitions, 9046 flow [2024-06-21 16:03:31,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 16:03:31,393 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:03:31,393 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:03:31,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192 [2024-06-21 16:03:31,394 INFO L420 AbstractCegarLoop]: === Iteration 194 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:03:31,394 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:03:31,394 INFO L85 PathProgramCache]: Analyzing trace with hash 1133791204, now seen corresponding path program 11 times [2024-06-21 16:03:31,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:03:31,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403221155] [2024-06-21 16:03:31,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:03:31,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:03:31,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:03:31,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:03:31,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:03:31,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403221155] [2024-06-21 16:03:31,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403221155] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:03:31,507 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:03:31,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:03:31,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096362343] [2024-06-21 16:03:31,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:03:31,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:03:31,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:03:31,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:03:31,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:03:31,540 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 16:03:31,541 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 515 places, 685 transitions, 9046 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 16:03:31,541 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:03:31,541 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 16:03:31,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:03:32,510 INFO L124 PetriNetUnfolderBase]: 3001/5159 cut-off events. [2024-06-21 16:03:32,510 INFO L125 PetriNetUnfolderBase]: For 447499/447499 co-relation queries the response was YES. [2024-06-21 16:03:32,575 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35579 conditions, 5159 events. 3001/5159 cut-off events. For 447499/447499 co-relation queries the response was YES. Maximal size of possible extension queue 491. Compared 35468 event pairs, 504 based on Foata normal form. 2/5159 useless extension candidates. Maximal degree in co-relation 35382. Up to 4467 conditions per place. [2024-06-21 16:03:32,595 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 603 selfloop transitions, 95 changer transitions 0/706 dead transitions. [2024-06-21 16:03:32,595 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 522 places, 706 transitions, 10532 flow [2024-06-21 16:03:32,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:03:32,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:03:32,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 186 transitions. [2024-06-21 16:03:32,596 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5670731707317073 [2024-06-21 16:03:32,596 INFO L175 Difference]: Start difference. First operand has 515 places, 685 transitions, 9046 flow. Second operand 8 states and 186 transitions. [2024-06-21 16:03:32,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 522 places, 706 transitions, 10532 flow [2024-06-21 16:03:35,831 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 518 places, 706 transitions, 10305 flow, removed 17 selfloop flow, removed 4 redundant places. [2024-06-21 16:03:35,838 INFO L231 Difference]: Finished difference. Result has 519 places, 687 transitions, 9062 flow [2024-06-21 16:03:35,838 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8821, PETRI_DIFFERENCE_MINUEND_PLACES=511, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=685, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=590, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9062, PETRI_PLACES=519, PETRI_TRANSITIONS=687} [2024-06-21 16:03:35,838 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 477 predicate places. [2024-06-21 16:03:35,839 INFO L495 AbstractCegarLoop]: Abstraction has has 519 places, 687 transitions, 9062 flow [2024-06-21 16:03:35,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 16:03:35,839 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:03:35,839 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:03:35,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193 [2024-06-21 16:03:35,839 INFO L420 AbstractCegarLoop]: === Iteration 195 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:03:35,839 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:03:35,840 INFO L85 PathProgramCache]: Analyzing trace with hash -507940926, now seen corresponding path program 12 times [2024-06-21 16:03:35,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:03:35,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663584723] [2024-06-21 16:03:35,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:03:35,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:03:35,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:03:35,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:03:35,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:03:35,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663584723] [2024-06-21 16:03:35,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663584723] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:03:35,951 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:03:35,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:03:35,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401241552] [2024-06-21 16:03:35,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:03:35,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:03:35,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:03:35,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:03:35,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:03:35,988 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 16:03:35,989 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 519 places, 687 transitions, 9062 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 16:03:35,989 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:03:35,989 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 16:03:35,989 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:03:36,992 INFO L124 PetriNetUnfolderBase]: 3009/5177 cut-off events. [2024-06-21 16:03:36,992 INFO L125 PetriNetUnfolderBase]: For 454015/454015 co-relation queries the response was YES. [2024-06-21 16:03:37,054 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35553 conditions, 5177 events. 3009/5177 cut-off events. For 454015/454015 co-relation queries the response was YES. Maximal size of possible extension queue 495. Compared 35648 event pairs, 504 based on Foata normal form. 2/5175 useless extension candidates. Maximal degree in co-relation 35355. Up to 4447 conditions per place. [2024-06-21 16:03:37,073 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 598 selfloop transitions, 104 changer transitions 0/710 dead transitions. [2024-06-21 16:03:37,073 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 526 places, 710 transitions, 10566 flow [2024-06-21 16:03:37,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:03:37,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:03:37,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 187 transitions. [2024-06-21 16:03:37,074 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5701219512195121 [2024-06-21 16:03:37,074 INFO L175 Difference]: Start difference. First operand has 519 places, 687 transitions, 9062 flow. Second operand 8 states and 187 transitions. [2024-06-21 16:03:37,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 526 places, 710 transitions, 10566 flow [2024-06-21 16:03:40,220 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 520 places, 710 transitions, 10353 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-21 16:03:40,228 INFO L231 Difference]: Finished difference. Result has 522 places, 690 transitions, 9135 flow [2024-06-21 16:03:40,228 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8849, PETRI_DIFFERENCE_MINUEND_PLACES=513, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=687, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=583, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9135, PETRI_PLACES=522, PETRI_TRANSITIONS=690} [2024-06-21 16:03:40,228 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 480 predicate places. [2024-06-21 16:03:40,228 INFO L495 AbstractCegarLoop]: Abstraction has has 522 places, 690 transitions, 9135 flow [2024-06-21 16:03:40,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 16:03:40,228 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:03:40,228 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:03:40,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194 [2024-06-21 16:03:40,229 INFO L420 AbstractCegarLoop]: === Iteration 196 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:03:40,229 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:03:40,229 INFO L85 PathProgramCache]: Analyzing trace with hash 552796264, now seen corresponding path program 13 times [2024-06-21 16:03:40,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:03:40,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299506806] [2024-06-21 16:03:40,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:03:40,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:03:40,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:03:40,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:03:40,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:03:40,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299506806] [2024-06-21 16:03:40,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299506806] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:03:40,340 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:03:40,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:03:40,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962900083] [2024-06-21 16:03:40,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:03:40,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:03:40,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:03:40,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:03:40,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:03:40,403 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 16:03:40,403 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 522 places, 690 transitions, 9135 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 16:03:40,404 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:03:40,404 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 16:03:40,404 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:03:41,436 INFO L124 PetriNetUnfolderBase]: 3017/5187 cut-off events. [2024-06-21 16:03:41,436 INFO L125 PetriNetUnfolderBase]: For 462291/462291 co-relation queries the response was YES. [2024-06-21 16:03:41,499 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35772 conditions, 5187 events. 3017/5187 cut-off events. For 462291/462291 co-relation queries the response was YES. Maximal size of possible extension queue 495. Compared 35711 event pairs, 506 based on Foata normal form. 2/5187 useless extension candidates. Maximal degree in co-relation 35572. Up to 4569 conditions per place. [2024-06-21 16:03:41,517 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 655 selfloop transitions, 48 changer transitions 0/711 dead transitions. [2024-06-21 16:03:41,517 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 529 places, 711 transitions, 10629 flow [2024-06-21 16:03:41,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:03:41,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:03:41,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 184 transitions. [2024-06-21 16:03:41,518 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5609756097560976 [2024-06-21 16:03:41,518 INFO L175 Difference]: Start difference. First operand has 522 places, 690 transitions, 9135 flow. Second operand 8 states and 184 transitions. [2024-06-21 16:03:41,518 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 529 places, 711 transitions, 10629 flow [2024-06-21 16:03:44,882 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 524 places, 711 transitions, 10403 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-21 16:03:44,889 INFO L231 Difference]: Finished difference. Result has 525 places, 692 transitions, 9056 flow [2024-06-21 16:03:44,889 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8909, PETRI_DIFFERENCE_MINUEND_PLACES=517, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=690, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=642, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9056, PETRI_PLACES=525, PETRI_TRANSITIONS=692} [2024-06-21 16:03:44,890 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 483 predicate places. [2024-06-21 16:03:44,890 INFO L495 AbstractCegarLoop]: Abstraction has has 525 places, 692 transitions, 9056 flow [2024-06-21 16:03:44,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 16:03:44,890 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:03:44,890 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:03:44,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195 [2024-06-21 16:03:44,890 INFO L420 AbstractCegarLoop]: === Iteration 197 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:03:44,890 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:03:44,890 INFO L85 PathProgramCache]: Analyzing trace with hash 552980962, now seen corresponding path program 5 times [2024-06-21 16:03:44,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:03:44,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499113899] [2024-06-21 16:03:44,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:03:44,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:03:44,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:03:44,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:03:44,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:03:44,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499113899] [2024-06-21 16:03:44,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499113899] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:03:44,994 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:03:44,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:03:44,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69069124] [2024-06-21 16:03:44,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:03:44,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:03:44,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:03:44,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:03:44,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:03:45,048 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 16:03:45,048 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 525 places, 692 transitions, 9056 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 16:03:45,048 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:03:45,048 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 16:03:45,048 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:03:46,060 INFO L124 PetriNetUnfolderBase]: 3012/5184 cut-off events. [2024-06-21 16:03:46,060 INFO L125 PetriNetUnfolderBase]: For 455782/455782 co-relation queries the response was YES. [2024-06-21 16:03:46,124 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35368 conditions, 5184 events. 3012/5184 cut-off events. For 455782/455782 co-relation queries the response was YES. Maximal size of possible extension queue 496. Compared 35748 event pairs, 511 based on Foata normal form. 2/5184 useless extension candidates. Maximal degree in co-relation 35167. Up to 4508 conditions per place. [2024-06-21 16:03:46,142 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 613 selfloop transitions, 91 changer transitions 0/712 dead transitions. [2024-06-21 16:03:46,143 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 532 places, 712 transitions, 10529 flow [2024-06-21 16:03:46,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:03:46,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:03:46,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 187 transitions. [2024-06-21 16:03:46,143 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5701219512195121 [2024-06-21 16:03:46,143 INFO L175 Difference]: Start difference. First operand has 525 places, 692 transitions, 9056 flow. Second operand 8 states and 187 transitions. [2024-06-21 16:03:46,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 532 places, 712 transitions, 10529 flow [2024-06-21 16:03:49,033 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 526 places, 712 transitions, 10378 flow, removed 29 selfloop flow, removed 6 redundant places. [2024-06-21 16:03:49,041 INFO L231 Difference]: Finished difference. Result has 527 places, 693 transitions, 9113 flow [2024-06-21 16:03:49,042 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8913, PETRI_DIFFERENCE_MINUEND_PLACES=519, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=692, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=601, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9113, PETRI_PLACES=527, PETRI_TRANSITIONS=693} [2024-06-21 16:03:49,042 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 485 predicate places. [2024-06-21 16:03:49,042 INFO L495 AbstractCegarLoop]: Abstraction has has 527 places, 693 transitions, 9113 flow [2024-06-21 16:03:49,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 16:03:49,042 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:03:49,043 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:03:49,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196 [2024-06-21 16:03:49,043 INFO L420 AbstractCegarLoop]: === Iteration 198 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:03:49,043 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:03:49,043 INFO L85 PathProgramCache]: Analyzing trace with hash 1295646658, now seen corresponding path program 14 times [2024-06-21 16:03:49,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:03:49,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711870835] [2024-06-21 16:03:49,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:03:49,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:03:49,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:03:49,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:03:49,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:03:49,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711870835] [2024-06-21 16:03:49,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711870835] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:03:49,164 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:03:49,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:03:49,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238380822] [2024-06-21 16:03:49,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:03:49,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:03:49,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:03:49,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:03:49,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:03:49,216 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 16:03:49,216 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 527 places, 693 transitions, 9113 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 16:03:49,216 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:03:49,216 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 16:03:49,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:03:50,361 INFO L124 PetriNetUnfolderBase]: 3020/5192 cut-off events. [2024-06-21 16:03:50,361 INFO L125 PetriNetUnfolderBase]: For 463168/463168 co-relation queries the response was YES. [2024-06-21 16:03:50,421 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35518 conditions, 5192 events. 3020/5192 cut-off events. For 463168/463168 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 35762 event pairs, 505 based on Foata normal form. 2/5192 useless extension candidates. Maximal degree in co-relation 35316. Up to 4562 conditions per place. [2024-06-21 16:03:50,441 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 644 selfloop transitions, 59 changer transitions 0/711 dead transitions. [2024-06-21 16:03:50,441 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 534 places, 711 transitions, 10603 flow [2024-06-21 16:03:50,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:03:50,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:03:50,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 182 transitions. [2024-06-21 16:03:50,442 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5548780487804879 [2024-06-21 16:03:50,442 INFO L175 Difference]: Start difference. First operand has 527 places, 693 transitions, 9113 flow. Second operand 8 states and 182 transitions. [2024-06-21 16:03:50,442 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 534 places, 711 transitions, 10603 flow [2024-06-21 16:03:53,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 529 places, 711 transitions, 10440 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-21 16:03:53,906 INFO L231 Difference]: Finished difference. Result has 530 places, 695 transitions, 9123 flow [2024-06-21 16:03:53,906 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8950, PETRI_DIFFERENCE_MINUEND_PLACES=522, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=693, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=634, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9123, PETRI_PLACES=530, PETRI_TRANSITIONS=695} [2024-06-21 16:03:53,906 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 488 predicate places. [2024-06-21 16:03:53,906 INFO L495 AbstractCegarLoop]: Abstraction has has 530 places, 695 transitions, 9123 flow [2024-06-21 16:03:53,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 16:03:53,907 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:03:53,907 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:03:53,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197 [2024-06-21 16:03:53,907 INFO L420 AbstractCegarLoop]: === Iteration 199 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:03:53,907 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:03:53,908 INFO L85 PathProgramCache]: Analyzing trace with hash 1039146148, now seen corresponding path program 15 times [2024-06-21 16:03:53,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:03:53,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757911496] [2024-06-21 16:03:53,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:03:53,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:03:53,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:03:54,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:03:54,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:03:54,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757911496] [2024-06-21 16:03:54,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757911496] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:03:54,029 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:03:54,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:03:54,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175920676] [2024-06-21 16:03:54,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:03:54,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:03:54,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:03:54,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:03:54,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:03:54,070 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 16:03:54,071 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 530 places, 695 transitions, 9123 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 16:03:54,071 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:03:54,071 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 16:03:54,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:03:55,454 INFO L124 PetriNetUnfolderBase]: 3028/5204 cut-off events. [2024-06-21 16:03:55,454 INFO L125 PetriNetUnfolderBase]: For 470678/470678 co-relation queries the response was YES. [2024-06-21 16:03:55,548 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35634 conditions, 5204 events. 3028/5204 cut-off events. For 470678/470678 co-relation queries the response was YES. Maximal size of possible extension queue 498. Compared 35825 event pairs, 505 based on Foata normal form. 2/5204 useless extension candidates. Maximal degree in co-relation 35431. Up to 4574 conditions per place. [2024-06-21 16:03:55,568 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 647 selfloop transitions, 60 changer transitions 0/715 dead transitions. [2024-06-21 16:03:55,568 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 539 places, 715 transitions, 10625 flow [2024-06-21 16:03:55,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:03:55,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:03:55,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 220 transitions. [2024-06-21 16:03:55,569 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5365853658536586 [2024-06-21 16:03:55,569 INFO L175 Difference]: Start difference. First operand has 530 places, 695 transitions, 9123 flow. Second operand 10 states and 220 transitions. [2024-06-21 16:03:55,569 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 539 places, 715 transitions, 10625 flow [2024-06-21 16:03:58,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 534 places, 715 transitions, 10504 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-21 16:03:58,956 INFO L231 Difference]: Finished difference. Result has 535 places, 697 transitions, 9177 flow [2024-06-21 16:03:58,956 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9002, PETRI_DIFFERENCE_MINUEND_PLACES=525, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=695, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=635, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9177, PETRI_PLACES=535, PETRI_TRANSITIONS=697} [2024-06-21 16:03:58,956 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 493 predicate places. [2024-06-21 16:03:58,956 INFO L495 AbstractCegarLoop]: Abstraction has has 535 places, 697 transitions, 9177 flow [2024-06-21 16:03:58,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 16:03:58,956 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:03:58,956 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:03:58,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198 [2024-06-21 16:03:58,957 INFO L420 AbstractCegarLoop]: === Iteration 200 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:03:58,957 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:03:58,957 INFO L85 PathProgramCache]: Analyzing trace with hash 1305169858, now seen corresponding path program 16 times [2024-06-21 16:03:58,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:03:58,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264797749] [2024-06-21 16:03:58,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:03:58,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:03:58,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:03:59,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:03:59,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:03:59,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264797749] [2024-06-21 16:03:59,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264797749] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:03:59,062 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:03:59,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:03:59,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752372975] [2024-06-21 16:03:59,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:03:59,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:03:59,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:03:59,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:03:59,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:03:59,110 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 16:03:59,110 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 535 places, 697 transitions, 9177 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 16:03:59,110 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:03:59,110 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 16:03:59,110 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:04:00,167 INFO L124 PetriNetUnfolderBase]: 3036/5218 cut-off events. [2024-06-21 16:04:00,167 INFO L125 PetriNetUnfolderBase]: For 477623/477623 co-relation queries the response was YES. [2024-06-21 16:04:00,232 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35762 conditions, 5218 events. 3036/5218 cut-off events. For 477623/477623 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 35980 event pairs, 503 based on Foata normal form. 2/5216 useless extension candidates. Maximal degree in co-relation 35558. Up to 4554 conditions per place. [2024-06-21 16:04:00,251 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 641 selfloop transitions, 68 changer transitions 0/717 dead transitions. [2024-06-21 16:04:00,251 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 542 places, 717 transitions, 10693 flow [2024-06-21 16:04:00,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:04:00,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:04:00,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 183 transitions. [2024-06-21 16:04:00,251 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5579268292682927 [2024-06-21 16:04:00,251 INFO L175 Difference]: Start difference. First operand has 535 places, 697 transitions, 9177 flow. Second operand 8 states and 183 transitions. [2024-06-21 16:04:00,252 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 542 places, 717 transitions, 10693 flow [2024-06-21 16:04:03,346 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 534 places, 717 transitions, 10546 flow, removed 15 selfloop flow, removed 8 redundant places. [2024-06-21 16:04:03,354 INFO L231 Difference]: Finished difference. Result has 536 places, 700 transitions, 9250 flow [2024-06-21 16:04:03,354 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9030, PETRI_DIFFERENCE_MINUEND_PLACES=527, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=697, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=629, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9250, PETRI_PLACES=536, PETRI_TRANSITIONS=700} [2024-06-21 16:04:03,355 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 494 predicate places. [2024-06-21 16:04:03,355 INFO L495 AbstractCegarLoop]: Abstraction has has 536 places, 700 transitions, 9250 flow [2024-06-21 16:04:03,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 16:04:03,355 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:04:03,355 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:04:03,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable199 [2024-06-21 16:04:03,355 INFO L420 AbstractCegarLoop]: === Iteration 201 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:04:03,355 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:04:03,355 INFO L85 PathProgramCache]: Analyzing trace with hash 1039330846, now seen corresponding path program 6 times [2024-06-21 16:04:03,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:04:03,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822665253] [2024-06-21 16:04:03,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:04:03,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:04:03,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:04:03,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:04:03,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:04:03,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822665253] [2024-06-21 16:04:03,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822665253] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:04:03,460 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:04:03,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:04:03,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22132927] [2024-06-21 16:04:03,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:04:03,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:04:03,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:04:03,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:04:03,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:04:03,509 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 16:04:03,510 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 536 places, 700 transitions, 9250 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 16:04:03,510 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:04:03,510 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 16:04:03,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:04:04,534 INFO L124 PetriNetUnfolderBase]: 3044/5236 cut-off events. [2024-06-21 16:04:04,534 INFO L125 PetriNetUnfolderBase]: For 486532/486532 co-relation queries the response was YES. [2024-06-21 16:04:04,599 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36013 conditions, 5236 events. 3044/5236 cut-off events. For 486532/486532 co-relation queries the response was YES. Maximal size of possible extension queue 503. Compared 36129 event pairs, 513 based on Foata normal form. 2/5236 useless extension candidates. Maximal degree in co-relation 35807. Up to 4556 conditions per place. [2024-06-21 16:04:04,618 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 621 selfloop transitions, 89 changer transitions 0/718 dead transitions. [2024-06-21 16:04:04,618 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 543 places, 718 transitions, 10770 flow [2024-06-21 16:04:04,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:04:04,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:04:04,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 185 transitions. [2024-06-21 16:04:04,619 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5640243902439024 [2024-06-21 16:04:04,619 INFO L175 Difference]: Start difference. First operand has 536 places, 700 transitions, 9250 flow. Second operand 8 states and 185 transitions. [2024-06-21 16:04:04,619 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 543 places, 718 transitions, 10770 flow [2024-06-21 16:04:08,432 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 538 places, 718 transitions, 10610 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-21 16:04:08,439 INFO L231 Difference]: Finished difference. Result has 539 places, 702 transitions, 9339 flow [2024-06-21 16:04:08,440 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9090, PETRI_DIFFERENCE_MINUEND_PLACES=531, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=700, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=611, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9339, PETRI_PLACES=539, PETRI_TRANSITIONS=702} [2024-06-21 16:04:08,440 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 497 predicate places. [2024-06-21 16:04:08,440 INFO L495 AbstractCegarLoop]: Abstraction has has 539 places, 702 transitions, 9339 flow [2024-06-21 16:04:08,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 16:04:08,440 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:04:08,440 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:04:08,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable200 [2024-06-21 16:04:08,441 INFO L420 AbstractCegarLoop]: === Iteration 202 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:04:08,441 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:04:08,441 INFO L85 PathProgramCache]: Analyzing trace with hash 1482159646, now seen corresponding path program 7 times [2024-06-21 16:04:08,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:04:08,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447475839] [2024-06-21 16:04:08,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:04:08,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:04:08,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:04:08,555 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:04:08,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:04:08,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447475839] [2024-06-21 16:04:08,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447475839] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:04:08,555 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:04:08,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:04:08,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121112635] [2024-06-21 16:04:08,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:04:08,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:04:08,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:04:08,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:04:08,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:04:08,615 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 16:04:08,615 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 539 places, 702 transitions, 9339 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 16:04:08,615 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:04:08,615 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 16:04:08,616 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:04:09,690 INFO L124 PetriNetUnfolderBase]: 3052/5257 cut-off events. [2024-06-21 16:04:09,690 INFO L125 PetriNetUnfolderBase]: For 495043/495043 co-relation queries the response was YES. [2024-06-21 16:04:09,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36264 conditions, 5257 events. 3052/5257 cut-off events. For 495043/495043 co-relation queries the response was YES. Maximal size of possible extension queue 505. Compared 36299 event pairs, 503 based on Foata normal form. 2/5258 useless extension candidates. Maximal degree in co-relation 36057. Up to 4667 conditions per place. [2024-06-21 16:04:09,775 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 682 selfloop transitions, 30 changer transitions 0/720 dead transitions. [2024-06-21 16:04:09,775 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 546 places, 720 transitions, 10867 flow [2024-06-21 16:04:09,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:04:09,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:04:09,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 180 transitions. [2024-06-21 16:04:09,776 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5487804878048781 [2024-06-21 16:04:09,776 INFO L175 Difference]: Start difference. First operand has 539 places, 702 transitions, 9339 flow. Second operand 8 states and 180 transitions. [2024-06-21 16:04:09,776 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 546 places, 720 transitions, 10867 flow [2024-06-21 16:04:13,616 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 540 places, 720 transitions, 10634 flow, removed 29 selfloop flow, removed 6 redundant places. [2024-06-21 16:04:13,624 INFO L231 Difference]: Finished difference. Result has 541 places, 704 transitions, 9241 flow [2024-06-21 16:04:13,624 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9106, PETRI_DIFFERENCE_MINUEND_PLACES=533, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=702, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=672, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9241, PETRI_PLACES=541, PETRI_TRANSITIONS=704} [2024-06-21 16:04:13,625 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 499 predicate places. [2024-06-21 16:04:13,625 INFO L495 AbstractCegarLoop]: Abstraction has has 541 places, 704 transitions, 9241 flow [2024-06-21 16:04:13,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 16:04:13,625 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:04:13,625 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:04:13,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable201 [2024-06-21 16:04:13,625 INFO L420 AbstractCegarLoop]: === Iteration 203 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:04:13,625 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:04:13,625 INFO L85 PathProgramCache]: Analyzing trace with hash 446473856, now seen corresponding path program 8 times [2024-06-21 16:04:13,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:04:13,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578258574] [2024-06-21 16:04:13,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:04:13,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:04:13,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:04:13,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:04:13,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:04:13,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578258574] [2024-06-21 16:04:13,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578258574] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:04:13,736 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:04:13,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:04:13,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698843065] [2024-06-21 16:04:13,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:04:13,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:04:13,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:04:13,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:04:13,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:04:13,778 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 16:04:13,778 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 541 places, 704 transitions, 9241 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 16:04:13,778 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:04:13,778 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 16:04:13,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:04:14,955 INFO L124 PetriNetUnfolderBase]: 3060/5267 cut-off events. [2024-06-21 16:04:14,956 INFO L125 PetriNetUnfolderBase]: For 502946/502946 co-relation queries the response was YES. [2024-06-21 16:04:15,019 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36316 conditions, 5267 events. 3060/5267 cut-off events. For 502946/502946 co-relation queries the response was YES. Maximal size of possible extension queue 507. Compared 36402 event pairs, 499 based on Foata normal form. 2/5268 useless extension candidates. Maximal degree in co-relation 36108. Up to 4665 conditions per place. [2024-06-21 16:04:15,036 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 682 selfloop transitions, 34 changer transitions 0/724 dead transitions. [2024-06-21 16:04:15,036 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 549 places, 724 transitions, 10785 flow [2024-06-21 16:04:15,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:04:15,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:04:15,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 200 transitions. [2024-06-21 16:04:15,037 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5420054200542005 [2024-06-21 16:04:15,037 INFO L175 Difference]: Start difference. First operand has 541 places, 704 transitions, 9241 flow. Second operand 9 states and 200 transitions. [2024-06-21 16:04:15,037 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 549 places, 724 transitions, 10785 flow [2024-06-21 16:04:19,146 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 544 places, 724 transitions, 10680 flow, removed 31 selfloop flow, removed 5 redundant places. [2024-06-21 16:04:19,153 INFO L231 Difference]: Finished difference. Result has 545 places, 706 transitions, 9283 flow [2024-06-21 16:04:19,154 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9136, PETRI_DIFFERENCE_MINUEND_PLACES=536, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=704, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=670, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9283, PETRI_PLACES=545, PETRI_TRANSITIONS=706} [2024-06-21 16:04:19,154 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 503 predicate places. [2024-06-21 16:04:19,154 INFO L495 AbstractCegarLoop]: Abstraction has has 545 places, 706 transitions, 9283 flow [2024-06-21 16:04:19,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 16:04:19,154 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:04:19,154 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:04:19,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable202 [2024-06-21 16:04:19,154 INFO L420 AbstractCegarLoop]: === Iteration 204 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:04:19,155 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:04:19,155 INFO L85 PathProgramCache]: Analyzing trace with hash -12370746, now seen corresponding path program 17 times [2024-06-21 16:04:19,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:04:19,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157048451] [2024-06-21 16:04:19,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:04:19,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:04:19,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:04:19,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:04:19,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:04:19,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157048451] [2024-06-21 16:04:19,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157048451] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:04:19,276 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:04:19,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:04:19,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168027243] [2024-06-21 16:04:19,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:04:19,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:04:19,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:04:19,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:04:19,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:04:19,311 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 16:04:19,311 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 545 places, 706 transitions, 9283 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 16:04:19,312 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:04:19,312 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 16:04:19,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:04:20,432 INFO L124 PetriNetUnfolderBase]: 3055/5252 cut-off events. [2024-06-21 16:04:20,432 INFO L125 PetriNetUnfolderBase]: For 496330/496330 co-relation queries the response was YES. [2024-06-21 16:04:20,500 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36049 conditions, 5252 events. 3055/5252 cut-off events. For 496330/496330 co-relation queries the response was YES. Maximal size of possible extension queue 508. Compared 36281 event pairs, 503 based on Foata normal form. 2/5252 useless extension candidates. Maximal degree in co-relation 35840. Up to 4534 conditions per place. [2024-06-21 16:04:20,520 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 638 selfloop transitions, 92 changer transitions 0/738 dead transitions. [2024-06-21 16:04:20,520 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 553 places, 738 transitions, 10823 flow [2024-06-21 16:04:20,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:04:20,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:04:20,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 220 transitions. [2024-06-21 16:04:20,521 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5962059620596206 [2024-06-21 16:04:20,521 INFO L175 Difference]: Start difference. First operand has 545 places, 706 transitions, 9283 flow. Second operand 9 states and 220 transitions. [2024-06-21 16:04:20,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 553 places, 738 transitions, 10823 flow [2024-06-21 16:04:24,712 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 546 places, 738 transitions, 10672 flow, removed 43 selfloop flow, removed 7 redundant places. [2024-06-21 16:04:24,719 INFO L231 Difference]: Finished difference. Result has 547 places, 706 transitions, 9330 flow [2024-06-21 16:04:24,720 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9132, PETRI_DIFFERENCE_MINUEND_PLACES=538, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=706, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=614, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9330, PETRI_PLACES=547, PETRI_TRANSITIONS=706} [2024-06-21 16:04:24,720 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 505 predicate places. [2024-06-21 16:04:24,720 INFO L495 AbstractCegarLoop]: Abstraction has has 547 places, 706 transitions, 9330 flow [2024-06-21 16:04:24,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 16:04:24,720 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:04:24,720 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:04:24,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable203 [2024-06-21 16:04:24,721 INFO L420 AbstractCegarLoop]: === Iteration 205 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:04:24,721 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:04:24,721 INFO L85 PathProgramCache]: Analyzing trace with hash -1794856416, now seen corresponding path program 18 times [2024-06-21 16:04:24,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:04:24,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326410198] [2024-06-21 16:04:24,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:04:24,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:04:24,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:04:24,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:04:24,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:04:24,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326410198] [2024-06-21 16:04:24,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326410198] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:04:24,831 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:04:24,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:04:24,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709562111] [2024-06-21 16:04:24,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:04:24,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:04:24,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:04:24,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:04:24,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:04:24,875 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 16:04:24,875 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 547 places, 706 transitions, 9330 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 16:04:24,875 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:04:24,875 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 16:04:24,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:04:25,977 INFO L124 PetriNetUnfolderBase]: 3050/5245 cut-off events. [2024-06-21 16:04:25,977 INFO L125 PetriNetUnfolderBase]: For 487888/487888 co-relation queries the response was YES. [2024-06-21 16:04:26,047 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35838 conditions, 5245 events. 3050/5245 cut-off events. For 487888/487888 co-relation queries the response was YES. Maximal size of possible extension queue 507. Compared 36279 event pairs, 502 based on Foata normal form. 2/5245 useless extension candidates. Maximal degree in co-relation 35628. Up to 4533 conditions per place. [2024-06-21 16:04:26,067 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 635 selfloop transitions, 87 changer transitions 0/730 dead transitions. [2024-06-21 16:04:26,067 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 553 places, 730 transitions, 10834 flow [2024-06-21 16:04:26,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:04:26,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:04:26,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-06-21 16:04:26,068 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6062717770034843 [2024-06-21 16:04:26,068 INFO L175 Difference]: Start difference. First operand has 547 places, 706 transitions, 9330 flow. Second operand 7 states and 174 transitions. [2024-06-21 16:04:26,068 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 553 places, 730 transitions, 10834 flow [2024-06-21 16:04:29,681 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 545 places, 730 transitions, 10619 flow, removed 14 selfloop flow, removed 8 redundant places. [2024-06-21 16:04:29,689 INFO L231 Difference]: Finished difference. Result has 546 places, 706 transitions, 9300 flow [2024-06-21 16:04:29,689 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9115, PETRI_DIFFERENCE_MINUEND_PLACES=539, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=706, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=619, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9300, PETRI_PLACES=546, PETRI_TRANSITIONS=706} [2024-06-21 16:04:29,690 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 504 predicate places. [2024-06-21 16:04:29,690 INFO L495 AbstractCegarLoop]: Abstraction has has 546 places, 706 transitions, 9300 flow [2024-06-21 16:04:29,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 16:04:29,690 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:04:29,690 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:04:29,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable204 [2024-06-21 16:04:29,690 INFO L420 AbstractCegarLoop]: === Iteration 206 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:04:29,690 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:04:29,690 INFO L85 PathProgramCache]: Analyzing trace with hash -1037830970, now seen corresponding path program 19 times [2024-06-21 16:04:29,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:04:29,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331399310] [2024-06-21 16:04:29,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:04:29,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:04:29,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:04:29,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:04:29,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:04:29,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331399310] [2024-06-21 16:04:29,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331399310] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:04:29,807 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:04:29,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:04:29,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239194744] [2024-06-21 16:04:29,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:04:29,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:04:29,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:04:29,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:04:29,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:04:29,865 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 16:04:29,865 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 546 places, 706 transitions, 9300 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 16:04:29,866 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:04:29,866 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 16:04:29,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:04:31,163 INFO L124 PetriNetUnfolderBase]: 3045/5244 cut-off events. [2024-06-21 16:04:31,163 INFO L125 PetriNetUnfolderBase]: For 465804/465806 co-relation queries the response was YES. [2024-06-21 16:04:31,225 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35453 conditions, 5244 events. 3045/5244 cut-off events. For 465804/465806 co-relation queries the response was YES. Maximal size of possible extension queue 507. Compared 36274 event pairs, 498 based on Foata normal form. 4/5247 useless extension candidates. Maximal degree in co-relation 35242. Up to 4520 conditions per place. [2024-06-21 16:04:31,242 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 641 selfloop transitions, 92 changer transitions 0/741 dead transitions. [2024-06-21 16:04:31,243 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 554 places, 741 transitions, 10854 flow [2024-06-21 16:04:31,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:04:31,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:04:31,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 222 transitions. [2024-06-21 16:04:31,243 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6016260162601627 [2024-06-21 16:04:31,243 INFO L175 Difference]: Start difference. First operand has 546 places, 706 transitions, 9300 flow. Second operand 9 states and 222 transitions. [2024-06-21 16:04:31,243 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 554 places, 741 transitions, 10854 flow [2024-06-21 16:04:34,102 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 548 places, 741 transitions, 10636 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-21 16:04:34,109 INFO L231 Difference]: Finished difference. Result has 549 places, 706 transitions, 9280 flow [2024-06-21 16:04:34,109 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9082, PETRI_DIFFERENCE_MINUEND_PLACES=540, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=706, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=614, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9280, PETRI_PLACES=549, PETRI_TRANSITIONS=706} [2024-06-21 16:04:34,110 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 507 predicate places. [2024-06-21 16:04:34,110 INFO L495 AbstractCegarLoop]: Abstraction has has 549 places, 706 transitions, 9280 flow [2024-06-21 16:04:34,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 16:04:34,110 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:04:34,110 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:04:34,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable205 [2024-06-21 16:04:34,111 INFO L420 AbstractCegarLoop]: === Iteration 207 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:04:34,111 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:04:34,111 INFO L85 PathProgramCache]: Analyzing trace with hash 253652964, now seen corresponding path program 20 times [2024-06-21 16:04:34,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:04:34,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346863304] [2024-06-21 16:04:34,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:04:34,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:04:34,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:04:34,217 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:04:34,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:04:34,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346863304] [2024-06-21 16:04:34,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346863304] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:04:34,218 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:04:34,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:04:34,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960379269] [2024-06-21 16:04:34,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:04:34,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:04:34,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:04:34,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:04:34,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:04:34,276 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 16:04:34,276 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 549 places, 706 transitions, 9280 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 16:04:34,276 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:04:34,276 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 16:04:34,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:04:35,392 INFO L124 PetriNetUnfolderBase]: 3040/5236 cut-off events. [2024-06-21 16:04:35,392 INFO L125 PetriNetUnfolderBase]: For 451056/451056 co-relation queries the response was YES. [2024-06-21 16:04:35,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35143 conditions, 5236 events. 3040/5236 cut-off events. For 451056/451056 co-relation queries the response was YES. Maximal size of possible extension queue 508. Compared 36214 event pairs, 399 based on Foata normal form. 2/5236 useless extension candidates. Maximal degree in co-relation 34931. Up to 4378 conditions per place. [2024-06-21 16:04:35,483 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 611 selfloop transitions, 112 changer transitions 0/731 dead transitions. [2024-06-21 16:04:35,483 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 555 places, 731 transitions, 10788 flow [2024-06-21 16:04:35,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:04:35,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:04:35,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-21 16:04:35,484 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-21 16:04:35,484 INFO L175 Difference]: Start difference. First operand has 549 places, 706 transitions, 9280 flow. Second operand 7 states and 175 transitions. [2024-06-21 16:04:35,484 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 555 places, 731 transitions, 10788 flow [2024-06-21 16:04:38,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 547 places, 731 transitions, 10573 flow, removed 14 selfloop flow, removed 8 redundant places. [2024-06-21 16:04:38,678 INFO L231 Difference]: Finished difference. Result has 548 places, 706 transitions, 9300 flow [2024-06-21 16:04:38,679 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9065, PETRI_DIFFERENCE_MINUEND_PLACES=541, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=706, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=594, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9300, PETRI_PLACES=548, PETRI_TRANSITIONS=706} [2024-06-21 16:04:38,679 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 506 predicate places. [2024-06-21 16:04:38,679 INFO L495 AbstractCegarLoop]: Abstraction has has 548 places, 706 transitions, 9300 flow [2024-06-21 16:04:38,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 16:04:38,679 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:04:38,679 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:04:38,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable206 [2024-06-21 16:04:38,679 INFO L420 AbstractCegarLoop]: === Iteration 208 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:04:38,679 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:04:38,680 INFO L85 PathProgramCache]: Analyzing trace with hash -12186048, now seen corresponding path program 9 times [2024-06-21 16:04:38,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:04:38,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711304623] [2024-06-21 16:04:38,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:04:38,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:04:38,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:04:38,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:04:38,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:04:38,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711304623] [2024-06-21 16:04:38,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711304623] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:04:38,785 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:04:38,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:04:38,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077203926] [2024-06-21 16:04:38,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:04:38,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:04:38,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:04:38,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:04:38,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:04:38,820 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 16:04:38,820 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 548 places, 706 transitions, 9300 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 16:04:38,821 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:04:38,821 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 16:04:38,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:04:39,887 INFO L124 PetriNetUnfolderBase]: 3048/5248 cut-off events. [2024-06-21 16:04:39,887 INFO L125 PetriNetUnfolderBase]: For 445787/445787 co-relation queries the response was YES. [2024-06-21 16:04:39,953 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35342 conditions, 5248 events. 3048/5248 cut-off events. For 445787/445787 co-relation queries the response was YES. Maximal size of possible extension queue 508. Compared 36310 event pairs, 511 based on Foata normal form. 2/5248 useless extension candidates. Maximal degree in co-relation 35129. Up to 4552 conditions per place. [2024-06-21 16:04:39,972 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 622 selfloop transitions, 96 changer transitions 0/726 dead transitions. [2024-06-21 16:04:39,972 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 554 places, 726 transitions, 10854 flow [2024-06-21 16:04:39,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:04:39,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:04:39,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-21 16:04:39,973 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-21 16:04:39,973 INFO L175 Difference]: Start difference. First operand has 548 places, 706 transitions, 9300 flow. Second operand 7 states and 168 transitions. [2024-06-21 16:04:39,973 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 554 places, 726 transitions, 10854 flow [2024-06-21 16:04:43,274 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 547 places, 726 transitions, 10582 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-21 16:04:43,282 INFO L231 Difference]: Finished difference. Result has 548 places, 708 transitions, 9309 flow [2024-06-21 16:04:43,282 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9028, PETRI_DIFFERENCE_MINUEND_PLACES=541, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=706, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=610, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9309, PETRI_PLACES=548, PETRI_TRANSITIONS=708} [2024-06-21 16:04:43,283 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 506 predicate places. [2024-06-21 16:04:43,283 INFO L495 AbstractCegarLoop]: Abstraction has has 548 places, 708 transitions, 9309 flow [2024-06-21 16:04:43,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 16:04:43,283 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:04:43,283 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] [2024-06-21 16:04:43,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207 [2024-06-21 16:04:43,283 INFO L420 AbstractCegarLoop]: === Iteration 209 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:04:43,283 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:04:43,283 INFO L85 PathProgramCache]: Analyzing trace with hash 400820796, now seen corresponding path program 10 times [2024-06-21 16:04:43,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:04:43,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075996582] [2024-06-21 16:04:43,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:04:43,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:04:43,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:04:43,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:04:43,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:04:43,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075996582] [2024-06-21 16:04:43,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075996582] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:04:43,393 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:04:43,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:04:43,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21690454] [2024-06-21 16:04:43,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:04:43,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:04:43,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:04:43,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:04:43,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:04:43,432 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 16:04:43,433 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 548 places, 708 transitions, 9309 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 16:04:43,433 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:04:43,433 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 16:04:43,433 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:04:44,574 INFO L124 PetriNetUnfolderBase]: 3069/5274 cut-off events. [2024-06-21 16:04:44,574 INFO L125 PetriNetUnfolderBase]: For 462206/462206 co-relation queries the response was YES. [2024-06-21 16:04:44,644 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35901 conditions, 5274 events. 3069/5274 cut-off events. For 462206/462206 co-relation queries the response was YES. Maximal size of possible extension queue 512. Compared 36408 event pairs, 490 based on Foata normal form. 2/5275 useless extension candidates. Maximal degree in co-relation 35688. Up to 4574 conditions per place. [2024-06-21 16:04:44,664 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 649 selfloop transitions, 82 changer transitions 0/739 dead transitions. [2024-06-21 16:04:44,665 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 555 places, 739 transitions, 11235 flow [2024-06-21 16:04:44,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:04:44,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:04:44,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 195 transitions. [2024-06-21 16:04:44,665 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5945121951219512 [2024-06-21 16:04:44,666 INFO L175 Difference]: Start difference. First operand has 548 places, 708 transitions, 9309 flow. Second operand 8 states and 195 transitions. [2024-06-21 16:04:44,666 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 555 places, 739 transitions, 11235 flow [2024-06-21 16:04:48,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 550 places, 739 transitions, 10974 flow, removed 39 selfloop flow, removed 5 redundant places. [2024-06-21 16:04:48,640 INFO L231 Difference]: Finished difference. Result has 551 places, 712 transitions, 9383 flow [2024-06-21 16:04:48,640 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9058, PETRI_DIFFERENCE_MINUEND_PLACES=543, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=708, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=628, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9383, PETRI_PLACES=551, PETRI_TRANSITIONS=712} [2024-06-21 16:04:48,641 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 509 predicate places. [2024-06-21 16:04:48,641 INFO L495 AbstractCegarLoop]: Abstraction has has 551 places, 712 transitions, 9383 flow [2024-06-21 16:04:48,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 16:04:48,641 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:04:48,641 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:04:48,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208 [2024-06-21 16:04:48,641 INFO L420 AbstractCegarLoop]: === Iteration 210 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:04:48,641 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:04:48,641 INFO L85 PathProgramCache]: Analyzing trace with hash 385583676, now seen corresponding path program 11 times [2024-06-21 16:04:48,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:04:48,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432738201] [2024-06-21 16:04:48,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:04:48,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:04:48,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:04:48,753 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:04:48,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:04:48,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432738201] [2024-06-21 16:04:48,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432738201] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:04:48,753 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:04:48,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:04:48,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670750483] [2024-06-21 16:04:48,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:04:48,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:04:48,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:04:48,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:04:48,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:04:48,790 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 16:04:48,790 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 551 places, 712 transitions, 9383 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 16:04:48,790 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:04:48,790 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 16:04:48,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:04:49,933 INFO L124 PetriNetUnfolderBase]: 3077/5296 cut-off events. [2024-06-21 16:04:49,933 INFO L125 PetriNetUnfolderBase]: For 462174/462174 co-relation queries the response was YES. [2024-06-21 16:04:50,002 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35960 conditions, 5296 events. 3077/5296 cut-off events. For 462174/462174 co-relation queries the response was YES. Maximal size of possible extension queue 515. Compared 36632 event pairs, 502 based on Foata normal form. 2/5297 useless extension candidates. Maximal degree in co-relation 35746. Up to 4629 conditions per place. [2024-06-21 16:04:50,024 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 662 selfloop transitions, 72 changer transitions 0/742 dead transitions. [2024-06-21 16:04:50,024 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 558 places, 742 transitions, 10999 flow [2024-06-21 16:04:50,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:04:50,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:04:50,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-06-21 16:04:50,025 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6036585365853658 [2024-06-21 16:04:50,025 INFO L175 Difference]: Start difference. First operand has 551 places, 712 transitions, 9383 flow. Second operand 8 states and 198 transitions. [2024-06-21 16:04:50,025 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 558 places, 742 transitions, 10999 flow [2024-06-21 16:04:53,412 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 554 places, 742 transitions, 10797 flow, removed 59 selfloop flow, removed 4 redundant places. [2024-06-21 16:04:53,420 INFO L231 Difference]: Finished difference. Result has 555 places, 714 transitions, 9416 flow [2024-06-21 16:04:53,420 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9207, PETRI_DIFFERENCE_MINUEND_PLACES=547, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=712, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=640, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9416, PETRI_PLACES=555, PETRI_TRANSITIONS=714} [2024-06-21 16:04:53,420 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 513 predicate places. [2024-06-21 16:04:53,420 INFO L495 AbstractCegarLoop]: Abstraction has has 555 places, 714 transitions, 9416 flow [2024-06-21 16:04:53,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 16:04:53,421 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:04:53,421 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:04:53,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209 [2024-06-21 16:04:53,421 INFO L420 AbstractCegarLoop]: === Iteration 211 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:04:53,421 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:04:53,421 INFO L85 PathProgramCache]: Analyzing trace with hash -1725705668, now seen corresponding path program 12 times [2024-06-21 16:04:53,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:04:53,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166949788] [2024-06-21 16:04:53,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:04:53,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:04:53,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:04:53,560 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:04:53,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:04:53,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166949788] [2024-06-21 16:04:53,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166949788] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:04:53,561 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:04:53,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:04:53,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772342874] [2024-06-21 16:04:53,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:04:53,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:04:53,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:04:53,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:04:53,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:04:53,607 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 16:04:53,607 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 555 places, 714 transitions, 9416 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 16:04:53,607 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:04:53,607 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 16:04:53,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:04:54,774 INFO L124 PetriNetUnfolderBase]: 3072/5286 cut-off events. [2024-06-21 16:04:54,774 INFO L125 PetriNetUnfolderBase]: For 452593/452595 co-relation queries the response was YES. [2024-06-21 16:04:54,841 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35609 conditions, 5286 events. 3072/5286 cut-off events. For 452593/452595 co-relation queries the response was YES. Maximal size of possible extension queue 514. Compared 36555 event pairs, 508 based on Foata normal form. 4/5289 useless extension candidates. Maximal degree in co-relation 35393. Up to 4630 conditions per place. [2024-06-21 16:04:54,860 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 659 selfloop transitions, 67 changer transitions 0/734 dead transitions. [2024-06-21 16:04:54,861 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 560 places, 734 transitions, 10918 flow [2024-06-21 16:04:54,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:04:54,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:04:54,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 152 transitions. [2024-06-21 16:04:54,861 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6178861788617886 [2024-06-21 16:04:54,861 INFO L175 Difference]: Start difference. First operand has 555 places, 714 transitions, 9416 flow. Second operand 6 states and 152 transitions. [2024-06-21 16:04:54,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 560 places, 734 transitions, 10918 flow [2024-06-21 16:04:58,600 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 554 places, 734 transitions, 10703 flow, removed 39 selfloop flow, removed 6 redundant places. [2024-06-21 16:04:58,607 INFO L231 Difference]: Finished difference. Result has 555 places, 714 transitions, 9340 flow [2024-06-21 16:04:58,608 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9201, PETRI_DIFFERENCE_MINUEND_PLACES=549, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=714, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=647, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=9340, PETRI_PLACES=555, PETRI_TRANSITIONS=714} [2024-06-21 16:04:58,608 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 513 predicate places. [2024-06-21 16:04:58,608 INFO L495 AbstractCegarLoop]: Abstraction has has 555 places, 714 transitions, 9340 flow [2024-06-21 16:04:58,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 16:04:58,608 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:04:58,608 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:04:58,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable210 [2024-06-21 16:04:58,608 INFO L420 AbstractCegarLoop]: === Iteration 212 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:04:58,608 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:04:58,609 INFO L85 PathProgramCache]: Analyzing trace with hash -1717134788, now seen corresponding path program 13 times [2024-06-21 16:04:58,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:04:58,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047975902] [2024-06-21 16:04:58,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:04:58,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:04:58,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:04:58,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:04:58,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:04:58,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047975902] [2024-06-21 16:04:58,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047975902] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:04:58,721 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:04:58,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:04:58,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058511666] [2024-06-21 16:04:58,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:04:58,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:04:58,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:04:58,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:04:58,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:04:58,773 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 16:04:58,774 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 555 places, 714 transitions, 9340 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 16:04:58,774 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:04:58,774 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 16:04:58,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:04:59,875 INFO L124 PetriNetUnfolderBase]: 3080/5296 cut-off events. [2024-06-21 16:04:59,876 INFO L125 PetriNetUnfolderBase]: For 459303/459305 co-relation queries the response was YES. [2024-06-21 16:04:59,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35674 conditions, 5296 events. 3080/5296 cut-off events. For 459303/459305 co-relation queries the response was YES. Maximal size of possible extension queue 517. Compared 36569 event pairs, 504 based on Foata normal form. 4/5299 useless extension candidates. Maximal degree in co-relation 35457. Up to 4614 conditions per place. [2024-06-21 16:04:59,967 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 657 selfloop transitions, 71 changer transitions 0/736 dead transitions. [2024-06-21 16:04:59,968 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 560 places, 736 transitions, 10970 flow [2024-06-21 16:04:59,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:04:59,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:04:59,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-21 16:04:59,968 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6016260162601627 [2024-06-21 16:04:59,968 INFO L175 Difference]: Start difference. First operand has 555 places, 714 transitions, 9340 flow. Second operand 6 states and 148 transitions. [2024-06-21 16:04:59,968 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 560 places, 736 transitions, 10970 flow [2024-06-21 16:05:04,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 555 places, 736 transitions, 10810 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-21 16:05:04,025 INFO L231 Difference]: Finished difference. Result has 557 places, 718 transitions, 9476 flow [2024-06-21 16:05:04,025 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9180, PETRI_DIFFERENCE_MINUEND_PLACES=550, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=714, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=644, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=9476, PETRI_PLACES=557, PETRI_TRANSITIONS=718} [2024-06-21 16:05:04,025 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 515 predicate places. [2024-06-21 16:05:04,025 INFO L495 AbstractCegarLoop]: Abstraction has has 557 places, 718 transitions, 9476 flow [2024-06-21 16:05:04,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 16:05:04,026 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:05:04,026 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:05:04,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable211 [2024-06-21 16:05:04,026 INFO L420 AbstractCegarLoop]: === Iteration 213 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:05:04,026 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:05:04,027 INFO L85 PathProgramCache]: Analyzing trace with hash 1440926444, now seen corresponding path program 14 times [2024-06-21 16:05:04,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:05:04,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085134408] [2024-06-21 16:05:04,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:05:04,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:05:04,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:05:04,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:05:04,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:05:04,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085134408] [2024-06-21 16:05:04,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085134408] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:05:04,161 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:05:04,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:05:04,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772159504] [2024-06-21 16:05:04,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:05:04,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:05:04,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:05:04,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:05:04,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:05:04,202 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 16:05:04,203 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 557 places, 718 transitions, 9476 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 16:05:04,203 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:05:04,203 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 16:05:04,203 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:05:05,311 INFO L124 PetriNetUnfolderBase]: 3088/5314 cut-off events. [2024-06-21 16:05:05,311 INFO L125 PetriNetUnfolderBase]: For 469397/469399 co-relation queries the response was YES. [2024-06-21 16:05:05,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36024 conditions, 5314 events. 3088/5314 cut-off events. For 469397/469399 co-relation queries the response was YES. Maximal size of possible extension queue 518. Compared 36829 event pairs, 510 based on Foata normal form. 4/5317 useless extension candidates. Maximal degree in co-relation 35805. Up to 4612 conditions per place. [2024-06-21 16:05:05,403 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 637 selfloop transitions, 96 changer transitions 0/741 dead transitions. [2024-06-21 16:05:05,404 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 563 places, 741 transitions, 11076 flow [2024-06-21 16:05:05,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:05:05,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:05:05,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-21 16:05:05,404 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5958188153310104 [2024-06-21 16:05:05,404 INFO L175 Difference]: Start difference. First operand has 557 places, 718 transitions, 9476 flow. Second operand 7 states and 171 transitions. [2024-06-21 16:05:05,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 563 places, 741 transitions, 11076 flow [2024-06-21 16:05:08,461 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 561 places, 741 transitions, 10890 flow, removed 58 selfloop flow, removed 2 redundant places. [2024-06-21 16:05:08,469 INFO L231 Difference]: Finished difference. Result has 562 places, 720 transitions, 9579 flow [2024-06-21 16:05:08,469 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9290, PETRI_DIFFERENCE_MINUEND_PLACES=555, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=718, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=622, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9579, PETRI_PLACES=562, PETRI_TRANSITIONS=720} [2024-06-21 16:05:08,469 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 520 predicate places. [2024-06-21 16:05:08,470 INFO L495 AbstractCegarLoop]: Abstraction has has 562 places, 720 transitions, 9579 flow [2024-06-21 16:05:08,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 16:05:08,470 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:05:08,470 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:05:08,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable212 [2024-06-21 16:05:08,470 INFO L420 AbstractCegarLoop]: === Iteration 214 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:05:08,470 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:05:08,470 INFO L85 PathProgramCache]: Analyzing trace with hash 47501884, now seen corresponding path program 15 times [2024-06-21 16:05:08,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:05:08,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278917435] [2024-06-21 16:05:08,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:05:08,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:05:08,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:05:08,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:05:08,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:05:08,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278917435] [2024-06-21 16:05:08,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278917435] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:05:08,577 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:05:08,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:05:08,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117517756] [2024-06-21 16:05:08,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:05:08,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:05:08,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:05:08,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:05:08,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:05:08,628 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 16:05:08,628 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 562 places, 720 transitions, 9579 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 16:05:08,628 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:05:08,628 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 16:05:08,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:05:09,957 INFO L124 PetriNetUnfolderBase]: 3109/5343 cut-off events. [2024-06-21 16:05:09,957 INFO L125 PetriNetUnfolderBase]: For 494308/494310 co-relation queries the response was YES. [2024-06-21 16:05:10,031 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36867 conditions, 5343 events. 3109/5343 cut-off events. For 494308/494310 co-relation queries the response was YES. Maximal size of possible extension queue 524. Compared 36940 event pairs, 468 based on Foata normal form. 4/5346 useless extension candidates. Maximal degree in co-relation 36646. Up to 4578 conditions per place. [2024-06-21 16:05:10,055 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 652 selfloop transitions, 87 changer transitions 0/747 dead transitions. [2024-06-21 16:05:10,055 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 568 places, 747 transitions, 11579 flow [2024-06-21 16:05:10,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:05:10,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:05:10,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-21 16:05:10,056 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5923344947735192 [2024-06-21 16:05:10,056 INFO L175 Difference]: Start difference. First operand has 562 places, 720 transitions, 9579 flow. Second operand 7 states and 170 transitions. [2024-06-21 16:05:10,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 568 places, 747 transitions, 11579 flow [2024-06-21 16:05:12,698 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 563 places, 747 transitions, 11330 flow, removed 33 selfloop flow, removed 5 redundant places. [2024-06-21 16:05:12,706 INFO L231 Difference]: Finished difference. Result has 565 places, 726 transitions, 9764 flow [2024-06-21 16:05:12,707 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9330, PETRI_DIFFERENCE_MINUEND_PLACES=557, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=720, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=636, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9764, PETRI_PLACES=565, PETRI_TRANSITIONS=726} [2024-06-21 16:05:12,707 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 523 predicate places. [2024-06-21 16:05:12,707 INFO L495 AbstractCegarLoop]: Abstraction has has 565 places, 726 transitions, 9764 flow [2024-06-21 16:05:12,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 16:05:12,707 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:05:12,707 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:05:12,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable213 [2024-06-21 16:05:12,707 INFO L420 AbstractCegarLoop]: === Iteration 215 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:05:12,708 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:05:12,708 INFO L85 PathProgramCache]: Analyzing trace with hash 40835644, now seen corresponding path program 16 times [2024-06-21 16:05:12,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:05:12,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349049140] [2024-06-21 16:05:12,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:05:12,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:05:12,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:05:12,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:05:12,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:05:12,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349049140] [2024-06-21 16:05:12,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349049140] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:05:12,828 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:05:12,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:05:12,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260539870] [2024-06-21 16:05:12,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:05:12,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:05:12,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:05:12,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:05:12,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:05:12,895 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 16:05:12,895 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 565 places, 726 transitions, 9764 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 16:05:12,895 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:05:12,895 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 16:05:12,896 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:05:14,020 INFO L124 PetriNetUnfolderBase]: 3104/5336 cut-off events. [2024-06-21 16:05:14,021 INFO L125 PetriNetUnfolderBase]: For 485470/485472 co-relation queries the response was YES. [2024-06-21 16:05:14,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36625 conditions, 5336 events. 3104/5336 cut-off events. For 485470/485472 co-relation queries the response was YES. Maximal size of possible extension queue 524. Compared 36964 event pairs, 466 based on Foata normal form. 4/5339 useless extension candidates. Maximal degree in co-relation 36402. Up to 4574 conditions per place. [2024-06-21 16:05:14,112 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 649 selfloop transitions, 89 changer transitions 0/746 dead transitions. [2024-06-21 16:05:14,112 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 571 places, 746 transitions, 11288 flow [2024-06-21 16:05:14,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:05:14,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:05:14,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-06-21 16:05:14,113 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5888501742160279 [2024-06-21 16:05:14,113 INFO L175 Difference]: Start difference. First operand has 565 places, 726 transitions, 9764 flow. Second operand 7 states and 169 transitions. [2024-06-21 16:05:14,113 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 571 places, 746 transitions, 11288 flow [2024-06-21 16:05:17,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 569 places, 746 transitions, 11018 flow, removed 100 selfloop flow, removed 2 redundant places. [2024-06-21 16:05:17,765 INFO L231 Difference]: Finished difference. Result has 570 places, 726 transitions, 9677 flow [2024-06-21 16:05:17,765 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9494, PETRI_DIFFERENCE_MINUEND_PLACES=563, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=726, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=637, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9677, PETRI_PLACES=570, PETRI_TRANSITIONS=726} [2024-06-21 16:05:17,766 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 528 predicate places. [2024-06-21 16:05:17,766 INFO L495 AbstractCegarLoop]: Abstraction has has 570 places, 726 transitions, 9677 flow [2024-06-21 16:05:17,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 16:05:17,766 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:05:17,766 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:05:17,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable214 [2024-06-21 16:05:17,766 INFO L420 AbstractCegarLoop]: === Iteration 216 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:05:17,766 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:05:17,766 INFO L85 PathProgramCache]: Analyzing trace with hash 1677101804, now seen corresponding path program 17 times [2024-06-21 16:05:17,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:05:17,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249876657] [2024-06-21 16:05:17,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:05:17,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:05:17,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:05:17,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:05:17,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:05:17,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249876657] [2024-06-21 16:05:17,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249876657] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:05:17,871 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:05:17,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:05:17,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185397881] [2024-06-21 16:05:17,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:05:17,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:05:17,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:05:17,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:05:17,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:05:17,908 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 16:05:17,908 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 570 places, 726 transitions, 9677 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 16:05:17,908 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:05:17,908 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 16:05:17,909 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:05:19,075 INFO L124 PetriNetUnfolderBase]: 3112/5350 cut-off events. [2024-06-21 16:05:19,075 INFO L125 PetriNetUnfolderBase]: For 487777/487779 co-relation queries the response was YES. [2024-06-21 16:05:19,148 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36623 conditions, 5350 events. 3112/5350 cut-off events. For 487777/487779 co-relation queries the response was YES. Maximal size of possible extension queue 526. Compared 37024 event pairs, 514 based on Foata normal form. 4/5353 useless extension candidates. Maximal degree in co-relation 36398. Up to 4654 conditions per place. [2024-06-21 16:05:19,168 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 643 selfloop transitions, 95 changer transitions 0/746 dead transitions. [2024-06-21 16:05:19,168 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 576 places, 746 transitions, 11281 flow [2024-06-21 16:05:19,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:05:19,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:05:19,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-21 16:05:19,169 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5818815331010453 [2024-06-21 16:05:19,169 INFO L175 Difference]: Start difference. First operand has 570 places, 726 transitions, 9677 flow. Second operand 7 states and 167 transitions. [2024-06-21 16:05:19,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 576 places, 746 transitions, 11281 flow [2024-06-21 16:05:22,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 570 places, 746 transitions, 11044 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-21 16:05:22,175 INFO L231 Difference]: Finished difference. Result has 571 places, 728 transitions, 9726 flow [2024-06-21 16:05:22,175 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9440, PETRI_DIFFERENCE_MINUEND_PLACES=564, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=726, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=631, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9726, PETRI_PLACES=571, PETRI_TRANSITIONS=728} [2024-06-21 16:05:22,175 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 529 predicate places. [2024-06-21 16:05:22,175 INFO L495 AbstractCegarLoop]: Abstraction has has 571 places, 728 transitions, 9726 flow [2024-06-21 16:05:22,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 16:05:22,175 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:05:22,176 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:05:22,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable215 [2024-06-21 16:05:22,176 INFO L420 AbstractCegarLoop]: === Iteration 217 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:05:22,176 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:05:22,176 INFO L85 PathProgramCache]: Analyzing trace with hash 1677398474, now seen corresponding path program 18 times [2024-06-21 16:05:22,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:05:22,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892508203] [2024-06-21 16:05:22,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:05:22,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:05:22,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:05:22,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:05:22,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:05:22,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892508203] [2024-06-21 16:05:22,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892508203] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:05:22,289 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:05:22,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:05:22,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367542688] [2024-06-21 16:05:22,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:05:22,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:05:22,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:05:22,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:05:22,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:05:22,328 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 16:05:22,329 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 571 places, 728 transitions, 9726 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 16:05:22,329 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:05:22,329 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 16:05:22,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:05:23,476 INFO L124 PetriNetUnfolderBase]: 3107/5331 cut-off events. [2024-06-21 16:05:23,476 INFO L125 PetriNetUnfolderBase]: For 479037/479039 co-relation queries the response was YES. [2024-06-21 16:05:23,556 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36197 conditions, 5331 events. 3107/5331 cut-off events. For 479037/479039 co-relation queries the response was YES. Maximal size of possible extension queue 526. Compared 36810 event pairs, 505 based on Foata normal form. 4/5334 useless extension candidates. Maximal degree in co-relation 35972. Up to 4583 conditions per place. [2024-06-21 16:05:23,576 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 630 selfloop transitions, 113 changer transitions 0/751 dead transitions. [2024-06-21 16:05:23,576 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 577 places, 751 transitions, 11402 flow [2024-06-21 16:05:23,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:05:23,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:05:23,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-21 16:05:23,577 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-21 16:05:23,577 INFO L175 Difference]: Start difference. First operand has 571 places, 728 transitions, 9726 flow. Second operand 7 states and 168 transitions. [2024-06-21 16:05:23,577 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 577 places, 751 transitions, 11402 flow [2024-06-21 16:05:26,715 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 572 places, 751 transitions, 11146 flow, removed 36 selfloop flow, removed 5 redundant places. [2024-06-21 16:05:26,723 INFO L231 Difference]: Finished difference. Result has 574 places, 732 transitions, 9884 flow [2024-06-21 16:05:26,723 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9470, PETRI_DIFFERENCE_MINUEND_PLACES=566, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=728, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=616, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9884, PETRI_PLACES=574, PETRI_TRANSITIONS=732} [2024-06-21 16:05:26,723 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 532 predicate places. [2024-06-21 16:05:26,723 INFO L495 AbstractCegarLoop]: Abstraction has has 574 places, 732 transitions, 9884 flow [2024-06-21 16:05:26,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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) [2024-06-21 16:05:26,723 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:05:26,724 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:05:26,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable216 [2024-06-21 16:05:26,724 INFO L420 AbstractCegarLoop]: === Iteration 218 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:05:26,724 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:05:26,724 INFO L85 PathProgramCache]: Analyzing trace with hash -1750053229, now seen corresponding path program 1 times [2024-06-21 16:05:26,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:05:26,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711888428] [2024-06-21 16:05:26,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:05:26,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:05:26,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:05:26,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:05:26,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:05:26,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711888428] [2024-06-21 16:05:26,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711888428] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:05:26,826 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:05:26,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:05:26,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267455190] [2024-06-21 16:05:26,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:05:26,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:05:26,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:05:26,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:05:26,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:05:26,870 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 16:05:26,870 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 574 places, 732 transitions, 9884 flow. Second operand has 9 states, 9 states have (on average 16.77777777777778) internal successors, (151), 9 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:05:26,870 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:05:26,870 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 16:05:26,870 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:05:28,039 INFO L124 PetriNetUnfolderBase]: 3120/5356 cut-off events. [2024-06-21 16:05:28,039 INFO L125 PetriNetUnfolderBase]: For 485661/485661 co-relation queries the response was YES. [2024-06-21 16:05:28,114 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36639 conditions, 5356 events. 3120/5356 cut-off events. For 485661/485661 co-relation queries the response was YES. Maximal size of possible extension queue 528. Compared 37085 event pairs, 503 based on Foata normal form. 1/5356 useless extension candidates. Maximal degree in co-relation 36412. Up to 4623 conditions per place. [2024-06-21 16:05:28,133 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 653 selfloop transitions, 109 changer transitions 0/770 dead transitions. [2024-06-21 16:05:28,133 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 582 places, 770 transitions, 11858 flow [2024-06-21 16:05:28,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:05:28,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:05:28,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 221 transitions. [2024-06-21 16:05:28,134 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5989159891598916 [2024-06-21 16:05:28,134 INFO L175 Difference]: Start difference. First operand has 574 places, 732 transitions, 9884 flow. Second operand 9 states and 221 transitions. [2024-06-21 16:05:28,134 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 582 places, 770 transitions, 11858 flow [2024-06-21 16:05:32,357 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 578 places, 770 transitions, 11631 flow, removed 59 selfloop flow, removed 4 redundant places. [2024-06-21 16:05:32,365 INFO L231 Difference]: Finished difference. Result has 579 places, 738 transitions, 10001 flow [2024-06-21 16:05:32,365 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9659, PETRI_DIFFERENCE_MINUEND_PLACES=570, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=732, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=626, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10001, PETRI_PLACES=579, PETRI_TRANSITIONS=738} [2024-06-21 16:05:32,366 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 537 predicate places. [2024-06-21 16:05:32,366 INFO L495 AbstractCegarLoop]: Abstraction has has 579 places, 738 transitions, 10001 flow [2024-06-21 16:05:32,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.77777777777778) internal successors, (151), 9 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:05:32,366 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:05:32,366 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:05:32,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable217 [2024-06-21 16:05:32,366 INFO L420 AbstractCegarLoop]: === Iteration 219 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:05:32,366 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:05:32,366 INFO L85 PathProgramCache]: Analyzing trace with hash 1460009361, now seen corresponding path program 2 times [2024-06-21 16:05:32,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:05:32,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521994301] [2024-06-21 16:05:32,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:05:32,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:05:32,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:05:32,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:05:32,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:05:32,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521994301] [2024-06-21 16:05:32,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521994301] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:05:32,484 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:05:32,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:05:32,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517234731] [2024-06-21 16:05:32,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:05:32,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:05:32,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:05:32,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:05:32,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:05:32,528 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 16:05:32,528 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 579 places, 738 transitions, 10001 flow. Second operand has 9 states, 9 states have (on average 16.77777777777778) internal successors, (151), 9 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:05:32,528 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:05:32,529 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 16:05:32,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:05:33,778 INFO L124 PetriNetUnfolderBase]: 3133/5378 cut-off events. [2024-06-21 16:05:33,778 INFO L125 PetriNetUnfolderBase]: For 495293/495293 co-relation queries the response was YES. [2024-06-21 16:05:33,858 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37371 conditions, 5378 events. 3133/5378 cut-off events. For 495293/495293 co-relation queries the response was YES. Maximal size of possible extension queue 530. Compared 37204 event pairs, 503 based on Foata normal form. 1/5378 useless extension candidates. Maximal degree in co-relation 37143. Up to 4688 conditions per place. [2024-06-21 16:05:33,877 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 667 selfloop transitions, 100 changer transitions 0/775 dead transitions. [2024-06-21 16:05:33,877 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 589 places, 775 transitions, 11993 flow [2024-06-21 16:05:33,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:05:33,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:05:33,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 254 transitions. [2024-06-21 16:05:33,878 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5631929046563193 [2024-06-21 16:05:33,878 INFO L175 Difference]: Start difference. First operand has 579 places, 738 transitions, 10001 flow. Second operand 11 states and 254 transitions. [2024-06-21 16:05:33,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 589 places, 775 transitions, 11993 flow [2024-06-21 16:05:38,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 584 places, 775 transitions, 11759 flow, removed 61 selfloop flow, removed 5 redundant places. [2024-06-21 16:05:38,034 INFO L231 Difference]: Finished difference. Result has 585 places, 744 transitions, 10103 flow [2024-06-21 16:05:38,034 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9815, PETRI_DIFFERENCE_MINUEND_PLACES=574, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=738, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=641, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=10103, PETRI_PLACES=585, PETRI_TRANSITIONS=744} [2024-06-21 16:05:38,034 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 543 predicate places. [2024-06-21 16:05:38,035 INFO L495 AbstractCegarLoop]: Abstraction has has 585 places, 744 transitions, 10103 flow [2024-06-21 16:05:38,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.77777777777778) internal successors, (151), 9 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:05:38,035 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:05:38,035 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:05:38,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable218 [2024-06-21 16:05:38,035 INFO L420 AbstractCegarLoop]: === Iteration 220 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:05:38,035 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:05:38,035 INFO L85 PathProgramCache]: Analyzing trace with hash 1460003781, now seen corresponding path program 3 times [2024-06-21 16:05:38,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:05:38,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292849318] [2024-06-21 16:05:38,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:05:38,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:05:38,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:05:38,159 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:05:38,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:05:38,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292849318] [2024-06-21 16:05:38,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292849318] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:05:38,159 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:05:38,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:05:38,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501771198] [2024-06-21 16:05:38,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:05:38,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:05:38,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:05:38,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:05:38,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:05:38,214 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 16:05:38,214 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 585 places, 744 transitions, 10103 flow. Second operand has 9 states, 9 states have (on average 16.77777777777778) internal successors, (151), 9 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:05:38,214 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:05:38,214 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 16:05:38,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:05:39,461 INFO L124 PetriNetUnfolderBase]: 3130/5378 cut-off events. [2024-06-21 16:05:39,461 INFO L125 PetriNetUnfolderBase]: For 493475/493475 co-relation queries the response was YES. [2024-06-21 16:05:39,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37321 conditions, 5378 events. 3130/5378 cut-off events. For 493475/493475 co-relation queries the response was YES. Maximal size of possible extension queue 531. Compared 37296 event pairs, 505 based on Foata normal form. 1/5378 useless extension candidates. Maximal degree in co-relation 37091. Up to 4685 conditions per place. [2024-06-21 16:05:39,563 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 665 selfloop transitions, 99 changer transitions 0/772 dead transitions. [2024-06-21 16:05:39,563 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 593 places, 772 transitions, 11701 flow [2024-06-21 16:05:39,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:05:39,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:05:39,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 217 transitions. [2024-06-21 16:05:39,564 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5880758807588076 [2024-06-21 16:05:39,564 INFO L175 Difference]: Start difference. First operand has 585 places, 744 transitions, 10103 flow. Second operand 9 states and 217 transitions. [2024-06-21 16:05:39,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 593 places, 772 transitions, 11701 flow [2024-06-21 16:05:43,601 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 586 places, 772 transitions, 11533 flow, removed 26 selfloop flow, removed 7 redundant places. [2024-06-21 16:05:43,610 INFO L231 Difference]: Finished difference. Result has 587 places, 744 transitions, 10139 flow [2024-06-21 16:05:43,610 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9935, PETRI_DIFFERENCE_MINUEND_PLACES=578, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=744, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=645, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10139, PETRI_PLACES=587, PETRI_TRANSITIONS=744} [2024-06-21 16:05:43,610 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 545 predicate places. [2024-06-21 16:05:43,610 INFO L495 AbstractCegarLoop]: Abstraction has has 587 places, 744 transitions, 10139 flow [2024-06-21 16:05:43,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.77777777777778) internal successors, (151), 9 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:05:43,611 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:05:43,611 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:05:43,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable219 [2024-06-21 16:05:43,611 INFO L420 AbstractCegarLoop]: === Iteration 221 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:05:43,611 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:05:43,611 INFO L85 PathProgramCache]: Analyzing trace with hash 894976731, now seen corresponding path program 4 times [2024-06-21 16:05:43,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:05:43,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683729355] [2024-06-21 16:05:43,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:05:43,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:05:43,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:05:43,728 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:05:43,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:05:43,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683729355] [2024-06-21 16:05:43,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683729355] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:05:43,728 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:05:43,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:05:43,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484199143] [2024-06-21 16:05:43,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:05:43,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:05:43,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:05:43,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:05:43,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:05:43,775 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 16:05:43,775 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 587 places, 744 transitions, 10139 flow. Second operand has 9 states, 9 states have (on average 16.77777777777778) internal successors, (151), 9 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:05:43,775 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:05:43,775 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 16:05:43,775 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:05:45,255 INFO L124 PetriNetUnfolderBase]: 3151/5409 cut-off events. [2024-06-21 16:05:45,255 INFO L125 PetriNetUnfolderBase]: For 517586/517586 co-relation queries the response was YES. [2024-06-21 16:05:45,325 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37973 conditions, 5409 events. 3151/5409 cut-off events. For 517586/517586 co-relation queries the response was YES. Maximal size of possible extension queue 532. Compared 37500 event pairs, 503 based on Foata normal form. 1/5409 useless extension candidates. Maximal degree in co-relation 37741. Up to 4700 conditions per place. [2024-06-21 16:05:45,343 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 668 selfloop transitions, 112 changer transitions 0/788 dead transitions. [2024-06-21 16:05:45,343 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 600 places, 788 transitions, 12439 flow [2024-06-21 16:05:45,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-21 16:05:45,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-21 16:05:45,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 317 transitions. [2024-06-21 16:05:45,344 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5522648083623694 [2024-06-21 16:05:45,344 INFO L175 Difference]: Start difference. First operand has 587 places, 744 transitions, 10139 flow. Second operand 14 states and 317 transitions. [2024-06-21 16:05:45,344 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 600 places, 788 transitions, 12439 flow [2024-06-21 16:05:49,181 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 592 places, 788 transitions, 12241 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-21 16:05:49,189 INFO L231 Difference]: Finished difference. Result has 593 places, 753 transitions, 10309 flow [2024-06-21 16:05:49,189 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9941, PETRI_DIFFERENCE_MINUEND_PLACES=579, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=744, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=638, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=10309, PETRI_PLACES=593, PETRI_TRANSITIONS=753} [2024-06-21 16:05:49,189 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 551 predicate places. [2024-06-21 16:05:49,190 INFO L495 AbstractCegarLoop]: Abstraction has has 593 places, 753 transitions, 10309 flow [2024-06-21 16:05:49,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.77777777777778) internal successors, (151), 9 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:05:49,190 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:05:49,190 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:05:49,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220 [2024-06-21 16:05:49,190 INFO L420 AbstractCegarLoop]: === Iteration 222 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:05:49,190 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:05:49,190 INFO L85 PathProgramCache]: Analyzing trace with hash 1086380389, now seen corresponding path program 5 times [2024-06-21 16:05:49,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:05:49,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836257080] [2024-06-21 16:05:49,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:05:49,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:05:49,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:05:49,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:05:49,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:05:49,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836257080] [2024-06-21 16:05:49,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836257080] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:05:49,302 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:05:49,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:05:49,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653916844] [2024-06-21 16:05:49,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:05:49,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:05:49,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:05:49,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:05:49,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:05:49,362 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 16:05:49,362 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 593 places, 753 transitions, 10309 flow. Second operand has 9 states, 9 states have (on average 16.77777777777778) internal successors, (151), 9 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:05:49,362 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:05:49,362 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 16:05:49,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:05:50,632 INFO L124 PetriNetUnfolderBase]: 3148/5405 cut-off events. [2024-06-21 16:05:50,632 INFO L125 PetriNetUnfolderBase]: For 516169/516169 co-relation queries the response was YES. [2024-06-21 16:05:50,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37913 conditions, 5405 events. 3148/5405 cut-off events. For 516169/516169 co-relation queries the response was YES. Maximal size of possible extension queue 532. Compared 37446 event pairs, 503 based on Foata normal form. 1/5405 useless extension candidates. Maximal degree in co-relation 37680. Up to 4697 conditions per place. [2024-06-21 16:05:50,733 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 666 selfloop transitions, 111 changer transitions 0/785 dead transitions. [2024-06-21 16:05:50,733 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 604 places, 785 transitions, 12205 flow [2024-06-21 16:05:50,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 16:05:50,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 16:05:50,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 278 transitions. [2024-06-21 16:05:50,734 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5650406504065041 [2024-06-21 16:05:50,734 INFO L175 Difference]: Start difference. First operand has 593 places, 753 transitions, 10309 flow. Second operand 12 states and 278 transitions. [2024-06-21 16:05:50,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 604 places, 785 transitions, 12205 flow [2024-06-21 16:05:54,823 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 594 places, 785 transitions, 11925 flow, removed 40 selfloop flow, removed 10 redundant places. [2024-06-21 16:05:54,832 INFO L231 Difference]: Finished difference. Result has 595 places, 753 transitions, 10257 flow [2024-06-21 16:05:54,832 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10029, PETRI_DIFFERENCE_MINUEND_PLACES=583, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=753, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=642, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=10257, PETRI_PLACES=595, PETRI_TRANSITIONS=753} [2024-06-21 16:05:54,832 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 553 predicate places. [2024-06-21 16:05:54,832 INFO L495 AbstractCegarLoop]: Abstraction has has 595 places, 753 transitions, 10257 flow [2024-06-21 16:05:54,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.77777777777778) internal successors, (151), 9 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:05:54,832 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:05:54,833 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:05:54,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable221 [2024-06-21 16:05:54,833 INFO L420 AbstractCegarLoop]: === Iteration 223 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:05:54,833 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:05:54,833 INFO L85 PathProgramCache]: Analyzing trace with hash 902328381, now seen corresponding path program 6 times [2024-06-21 16:05:54,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:05:54,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867328388] [2024-06-21 16:05:54,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:05:54,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:05:54,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:05:54,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:05:54,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:05:54,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867328388] [2024-06-21 16:05:54,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867328388] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:05:54,944 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:05:54,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:05:54,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127605296] [2024-06-21 16:05:54,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:05:54,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:05:54,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:05:54,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:05:54,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:05:55,001 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 16:05:55,002 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 595 places, 753 transitions, 10257 flow. Second operand has 9 states, 9 states have (on average 16.77777777777778) internal successors, (151), 9 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:05:55,002 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:05:55,002 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 16:05:55,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:05:56,329 INFO L124 PetriNetUnfolderBase]: 3145/5401 cut-off events. [2024-06-21 16:05:56,329 INFO L125 PetriNetUnfolderBase]: For 514223/514223 co-relation queries the response was YES. [2024-06-21 16:05:56,413 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37749 conditions, 5401 events. 3145/5401 cut-off events. For 514223/514223 co-relation queries the response was YES. Maximal size of possible extension queue 532. Compared 37408 event pairs, 503 based on Foata normal form. 1/5401 useless extension candidates. Maximal degree in co-relation 37515. Up to 4694 conditions per place. [2024-06-21 16:05:56,432 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 663 selfloop transitions, 115 changer transitions 0/786 dead transitions. [2024-06-21 16:05:56,432 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 608 places, 786 transitions, 11893 flow [2024-06-21 16:05:56,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-21 16:05:56,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-21 16:05:56,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 310 transitions. [2024-06-21 16:05:56,433 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5400696864111498 [2024-06-21 16:05:56,433 INFO L175 Difference]: Start difference. First operand has 595 places, 753 transitions, 10257 flow. Second operand 14 states and 310 transitions. [2024-06-21 16:05:56,433 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 608 places, 786 transitions, 11893 flow [2024-06-21 16:06:00,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 597 places, 786 transitions, 11657 flow, removed 7 selfloop flow, removed 11 redundant places. [2024-06-21 16:06:00,494 INFO L231 Difference]: Finished difference. Result has 598 places, 753 transitions, 10257 flow [2024-06-21 16:06:00,494 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10021, PETRI_DIFFERENCE_MINUEND_PLACES=584, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=753, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=638, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=10257, PETRI_PLACES=598, PETRI_TRANSITIONS=753} [2024-06-21 16:06:00,494 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 556 predicate places. [2024-06-21 16:06:00,494 INFO L495 AbstractCegarLoop]: Abstraction has has 598 places, 753 transitions, 10257 flow [2024-06-21 16:06:00,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.77777777777778) internal successors, (151), 9 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:06:00,494 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:06:00,494 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:06:00,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable222 [2024-06-21 16:06:00,494 INFO L420 AbstractCegarLoop]: === Iteration 224 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:06:00,495 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:06:00,495 INFO L85 PathProgramCache]: Analyzing trace with hash -913775247, now seen corresponding path program 7 times [2024-06-21 16:06:00,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:06:00,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011660654] [2024-06-21 16:06:00,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:06:00,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:06:00,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:06:00,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:06:00,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:06:00,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011660654] [2024-06-21 16:06:00,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011660654] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:06:00,606 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:06:00,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:06:00,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384650404] [2024-06-21 16:06:00,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:06:00,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:06:00,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:06:00,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:06:00,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:06:00,654 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 16:06:00,654 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 598 places, 753 transitions, 10257 flow. Second operand has 9 states, 9 states have (on average 16.77777777777778) internal successors, (151), 9 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:06:00,654 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:06:00,654 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 16:06:00,654 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:06:01,850 INFO L124 PetriNetUnfolderBase]: 3166/5436 cut-off events. [2024-06-21 16:06:01,850 INFO L125 PetriNetUnfolderBase]: For 540686/540686 co-relation queries the response was YES. [2024-06-21 16:06:01,929 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38358 conditions, 5436 events. 3166/5436 cut-off events. For 540686/540686 co-relation queries the response was YES. Maximal size of possible extension queue 535. Compared 37757 event pairs, 524 based on Foata normal form. 1/5435 useless extension candidates. Maximal degree in co-relation 38123. Up to 4030 conditions per place. [2024-06-21 16:06:01,948 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 414 selfloop transitions, 375 changer transitions 0/797 dead transitions. [2024-06-21 16:06:01,948 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 606 places, 797 transitions, 13233 flow [2024-06-21 16:06:01,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:06:01,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:06:01,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 229 transitions. [2024-06-21 16:06:01,949 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6205962059620597 [2024-06-21 16:06:01,949 INFO L175 Difference]: Start difference. First operand has 598 places, 753 transitions, 10257 flow. Second operand 9 states and 229 transitions. [2024-06-21 16:06:01,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 606 places, 797 transitions, 13233 flow [2024-06-21 16:06:06,611 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 593 places, 797 transitions, 12991 flow, removed 4 selfloop flow, removed 13 redundant places. [2024-06-21 16:06:06,619 INFO L231 Difference]: Finished difference. Result has 594 places, 765 transitions, 11025 flow [2024-06-21 16:06:06,619 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10015, PETRI_DIFFERENCE_MINUEND_PLACES=585, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=753, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=366, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=387, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11025, PETRI_PLACES=594, PETRI_TRANSITIONS=765} [2024-06-21 16:06:06,619 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 552 predicate places. [2024-06-21 16:06:06,620 INFO L495 AbstractCegarLoop]: Abstraction has has 594 places, 765 transitions, 11025 flow [2024-06-21 16:06:06,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.77777777777778) internal successors, (151), 9 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:06:06,620 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:06:06,620 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:06:06,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable223 [2024-06-21 16:06:06,620 INFO L420 AbstractCegarLoop]: === Iteration 225 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:06:06,621 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:06:06,621 INFO L85 PathProgramCache]: Analyzing trace with hash -910056177, now seen corresponding path program 8 times [2024-06-21 16:06:06,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:06:06,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457416633] [2024-06-21 16:06:06,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:06:06,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:06:06,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:06:06,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:06:06,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:06:06,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457416633] [2024-06-21 16:06:06,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457416633] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:06:06,735 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:06:06,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:06:06,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885014222] [2024-06-21 16:06:06,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:06:06,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:06:06,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:06:06,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:06:06,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:06:06,786 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 16:06:06,786 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 594 places, 765 transitions, 11025 flow. Second operand has 9 states, 9 states have (on average 16.77777777777778) internal successors, (151), 9 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:06:06,786 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:06:06,786 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 16:06:06,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:06:08,068 INFO L124 PetriNetUnfolderBase]: 3179/5459 cut-off events. [2024-06-21 16:06:08,069 INFO L125 PetriNetUnfolderBase]: For 563283/563285 co-relation queries the response was YES. [2024-06-21 16:06:08,150 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39757 conditions, 5459 events. 3179/5459 cut-off events. For 563283/563285 co-relation queries the response was YES. Maximal size of possible extension queue 537. Compared 37911 event pairs, 512 based on Foata normal form. 3/5461 useless extension candidates. Maximal degree in co-relation 39521. Up to 4554 conditions per place. [2024-06-21 16:06:08,172 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 562 selfloop transitions, 227 changer transitions 0/797 dead transitions. [2024-06-21 16:06:08,172 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 602 places, 797 transitions, 13073 flow [2024-06-21 16:06:08,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:06:08,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:06:08,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 219 transitions. [2024-06-21 16:06:08,173 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5934959349593496 [2024-06-21 16:06:08,173 INFO L175 Difference]: Start difference. First operand has 594 places, 765 transitions, 11025 flow. Second operand 9 states and 219 transitions. [2024-06-21 16:06:08,173 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 602 places, 797 transitions, 13073 flow [2024-06-21 16:06:13,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 599 places, 797 transitions, 12706 flow, removed 98 selfloop flow, removed 3 redundant places. [2024-06-21 16:06:13,025 INFO L231 Difference]: Finished difference. Result has 600 places, 771 transitions, 11260 flow [2024-06-21 16:06:13,025 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10726, PETRI_DIFFERENCE_MINUEND_PLACES=591, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=765, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=224, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=541, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11260, PETRI_PLACES=600, PETRI_TRANSITIONS=771} [2024-06-21 16:06:13,025 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 558 predicate places. [2024-06-21 16:06:13,025 INFO L495 AbstractCegarLoop]: Abstraction has has 600 places, 771 transitions, 11260 flow [2024-06-21 16:06:13,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.77777777777778) internal successors, (151), 9 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:06:13,026 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:06:13,026 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:06:13,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable224 [2024-06-21 16:06:13,026 INFO L420 AbstractCegarLoop]: === Iteration 226 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:06:13,026 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:06:13,026 INFO L85 PathProgramCache]: Analyzing trace with hash -910050597, now seen corresponding path program 9 times [2024-06-21 16:06:13,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:06:13,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132610150] [2024-06-21 16:06:13,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:06:13,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:06:13,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:06:13,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:06:13,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:06:13,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132610150] [2024-06-21 16:06:13,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132610150] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:06:13,131 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:06:13,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:06:13,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294751557] [2024-06-21 16:06:13,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:06:13,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:06:13,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:06:13,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:06:13,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:06:13,189 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 16:06:13,189 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 600 places, 771 transitions, 11260 flow. Second operand has 9 states, 9 states have (on average 16.77777777777778) internal successors, (151), 9 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:06:13,189 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:06:13,189 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 16:06:13,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:06:14,548 INFO L124 PetriNetUnfolderBase]: 3176/5455 cut-off events. [2024-06-21 16:06:14,548 INFO L125 PetriNetUnfolderBase]: For 557549/557551 co-relation queries the response was YES. [2024-06-21 16:06:14,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39466 conditions, 5455 events. 3176/5455 cut-off events. For 557549/557551 co-relation queries the response was YES. Maximal size of possible extension queue 537. Compared 37850 event pairs, 512 based on Foata normal form. 3/5457 useless extension candidates. Maximal degree in co-relation 39228. Up to 4551 conditions per place. [2024-06-21 16:06:14,646 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 562 selfloop transitions, 228 changer transitions 0/798 dead transitions. [2024-06-21 16:06:14,646 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 610 places, 798 transitions, 12906 flow [2024-06-21 16:06:14,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:06:14,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:06:14,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 254 transitions. [2024-06-21 16:06:14,647 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5631929046563193 [2024-06-21 16:06:14,647 INFO L175 Difference]: Start difference. First operand has 600 places, 771 transitions, 11260 flow. Second operand 11 states and 254 transitions. [2024-06-21 16:06:14,647 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 610 places, 798 transitions, 12906 flow [2024-06-21 16:06:18,358 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 605 places, 798 transitions, 12612 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-21 16:06:18,367 INFO L231 Difference]: Finished difference. Result has 606 places, 771 transitions, 11428 flow [2024-06-21 16:06:18,367 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10966, PETRI_DIFFERENCE_MINUEND_PLACES=595, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=771, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=228, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=543, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=11428, PETRI_PLACES=606, PETRI_TRANSITIONS=771} [2024-06-21 16:06:18,368 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 564 predicate places. [2024-06-21 16:06:18,368 INFO L495 AbstractCegarLoop]: Abstraction has has 606 places, 771 transitions, 11428 flow [2024-06-21 16:06:18,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.77777777777778) internal successors, (151), 9 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:06:18,368 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:06:18,368 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:06:18,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable225 [2024-06-21 16:06:18,368 INFO L420 AbstractCegarLoop]: === Iteration 227 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:06:18,369 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:06:18,369 INFO L85 PathProgramCache]: Analyzing trace with hash -1564211895, now seen corresponding path program 10 times [2024-06-21 16:06:18,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:06:18,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668059778] [2024-06-21 16:06:18,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:06:18,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:06:18,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:06:18,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:06:18,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:06:18,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668059778] [2024-06-21 16:06:18,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668059778] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:06:18,496 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:06:18,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:06:18,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867392167] [2024-06-21 16:06:18,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:06:18,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:06:18,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:06:18,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:06:18,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:06:18,569 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 16:06:18,570 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 606 places, 771 transitions, 11428 flow. Second operand has 9 states, 9 states have (on average 16.77777777777778) internal successors, (151), 9 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:06:18,570 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:06:18,570 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 16:06:18,570 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:06:19,874 INFO L124 PetriNetUnfolderBase]: 3181/5463 cut-off events. [2024-06-21 16:06:19,874 INFO L125 PetriNetUnfolderBase]: For 565053/565053 co-relation queries the response was YES. [2024-06-21 16:06:19,957 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39952 conditions, 5463 events. 3181/5463 cut-off events. For 565053/565053 co-relation queries the response was YES. Maximal size of possible extension queue 538. Compared 37924 event pairs, 524 based on Foata normal form. 1/5462 useless extension candidates. Maximal degree in co-relation 39712. Up to 4048 conditions per place. [2024-06-21 16:06:19,978 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 398 selfloop transitions, 399 changer transitions 0/805 dead transitions. [2024-06-21 16:06:19,978 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 614 places, 805 transitions, 13960 flow [2024-06-21 16:06:19,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:06:19,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:06:19,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 227 transitions. [2024-06-21 16:06:19,980 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6151761517615176 [2024-06-21 16:06:19,980 INFO L175 Difference]: Start difference. First operand has 606 places, 771 transitions, 11428 flow. Second operand 9 states and 227 transitions. [2024-06-21 16:06:19,980 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 614 places, 805 transitions, 13960 flow [2024-06-21 16:06:24,984 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 604 places, 805 transitions, 13496 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-21 16:06:24,993 INFO L231 Difference]: Finished difference. Result has 605 places, 774 transitions, 11808 flow [2024-06-21 16:06:24,993 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10964, PETRI_DIFFERENCE_MINUEND_PLACES=596, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=771, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=396, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=375, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11808, PETRI_PLACES=605, PETRI_TRANSITIONS=774} [2024-06-21 16:06:24,994 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 563 predicate places. [2024-06-21 16:06:24,994 INFO L495 AbstractCegarLoop]: Abstraction has has 605 places, 774 transitions, 11808 flow [2024-06-21 16:06:24,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.77777777777778) internal successors, (151), 9 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:06:24,994 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:06:24,994 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:06:24,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable226 [2024-06-21 16:06:24,995 INFO L420 AbstractCegarLoop]: === Iteration 228 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:06:24,995 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:06:24,995 INFO L85 PathProgramCache]: Analyzing trace with hash -1239084825, now seen corresponding path program 11 times [2024-06-21 16:06:24,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:06:24,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803955300] [2024-06-21 16:06:24,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:06:24,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:06:24,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:06:25,110 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:06:25,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:06:25,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803955300] [2024-06-21 16:06:25,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803955300] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:06:25,110 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:06:25,110 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:06:25,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632452772] [2024-06-21 16:06:25,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:06:25,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:06:25,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:06:25,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:06:25,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:06:25,153 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 16:06:25,154 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 605 places, 774 transitions, 11808 flow. Second operand has 9 states, 9 states have (on average 16.77777777777778) internal successors, (151), 9 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:06:25,154 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:06:25,154 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 16:06:25,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:06:26,471 INFO L124 PetriNetUnfolderBase]: 3194/5489 cut-off events. [2024-06-21 16:06:26,471 INFO L125 PetriNetUnfolderBase]: For 583649/583649 co-relation queries the response was YES. [2024-06-21 16:06:26,561 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40685 conditions, 5489 events. 3194/5489 cut-off events. For 583649/583649 co-relation queries the response was YES. Maximal size of possible extension queue 541. Compared 38207 event pairs, 526 based on Foata normal form. 1/5488 useless extension candidates. Maximal degree in co-relation 40444. Up to 4063 conditions per place. [2024-06-21 16:06:26,585 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 402 selfloop transitions, 398 changer transitions 0/808 dead transitions. [2024-06-21 16:06:26,585 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 613 places, 808 transitions, 14396 flow [2024-06-21 16:06:26,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:06:26,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:06:26,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 224 transitions. [2024-06-21 16:06:26,585 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6070460704607046 [2024-06-21 16:06:26,586 INFO L175 Difference]: Start difference. First operand has 605 places, 774 transitions, 11808 flow. Second operand 9 states and 224 transitions. [2024-06-21 16:06:26,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 613 places, 808 transitions, 14396 flow [2024-06-21 16:06:31,102 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 606 places, 808 transitions, 13490 flow, removed 23 selfloop flow, removed 7 redundant places. [2024-06-21 16:06:31,111 INFO L231 Difference]: Finished difference. Result has 607 places, 780 transitions, 11796 flow [2024-06-21 16:06:31,111 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10926, PETRI_DIFFERENCE_MINUEND_PLACES=598, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=774, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=392, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=382, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11796, PETRI_PLACES=607, PETRI_TRANSITIONS=780} [2024-06-21 16:06:31,111 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 565 predicate places. [2024-06-21 16:06:31,112 INFO L495 AbstractCegarLoop]: Abstraction has has 607 places, 780 transitions, 11796 flow [2024-06-21 16:06:31,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.77777777777778) internal successors, (151), 9 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:06:31,112 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:06:31,112 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:06:31,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable227 [2024-06-21 16:06:31,112 INFO L420 AbstractCegarLoop]: === Iteration 229 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:06:31,112 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:06:31,112 INFO L85 PathProgramCache]: Analyzing trace with hash -1239470775, now seen corresponding path program 12 times [2024-06-21 16:06:31,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:06:31,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810163827] [2024-06-21 16:06:31,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:06:31,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:06:31,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:06:31,235 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:06:31,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:06:31,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810163827] [2024-06-21 16:06:31,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810163827] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:06:31,235 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:06:31,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:06:31,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420497725] [2024-06-21 16:06:31,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:06:31,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:06:31,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:06:31,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:06:31,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:06:31,277 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 16:06:31,277 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 607 places, 780 transitions, 11796 flow. Second operand has 9 states, 9 states have (on average 16.77777777777778) internal successors, (151), 9 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:06:31,277 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:06:31,277 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 16:06:31,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:06:32,938 INFO L124 PetriNetUnfolderBase]: 3191/5485 cut-off events. [2024-06-21 16:06:32,938 INFO L125 PetriNetUnfolderBase]: For 581159/581159 co-relation queries the response was YES. [2024-06-21 16:06:33,012 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40493 conditions, 5485 events. 3191/5485 cut-off events. For 581159/581159 co-relation queries the response was YES. Maximal size of possible extension queue 541. Compared 38160 event pairs, 526 based on Foata normal form. 1/5484 useless extension candidates. Maximal degree in co-relation 40251. Up to 4060 conditions per place. [2024-06-21 16:06:33,029 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 404 selfloop transitions, 395 changer transitions 0/807 dead transitions. [2024-06-21 16:06:33,029 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 615 places, 807 transitions, 14016 flow [2024-06-21 16:06:33,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:06:33,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:06:33,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 224 transitions. [2024-06-21 16:06:33,030 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6070460704607046 [2024-06-21 16:06:33,030 INFO L175 Difference]: Start difference. First operand has 607 places, 780 transitions, 11796 flow. Second operand 9 states and 224 transitions. [2024-06-21 16:06:33,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 615 places, 807 transitions, 14016 flow [2024-06-21 16:06:37,857 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 611 places, 807 transitions, 13491 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-21 16:06:37,867 INFO L231 Difference]: Finished difference. Result has 612 places, 780 transitions, 12067 flow [2024-06-21 16:06:37,867 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11271, PETRI_DIFFERENCE_MINUEND_PLACES=603, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=780, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=395, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=385, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12067, PETRI_PLACES=612, PETRI_TRANSITIONS=780} [2024-06-21 16:06:37,867 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 570 predicate places. [2024-06-21 16:06:37,867 INFO L495 AbstractCegarLoop]: Abstraction has has 612 places, 780 transitions, 12067 flow [2024-06-21 16:06:37,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.77777777777778) internal successors, (151), 9 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:06:37,868 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:06:37,868 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:06:37,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable228 [2024-06-21 16:06:37,868 INFO L420 AbstractCegarLoop]: === Iteration 230 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:06:37,868 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:06:37,868 INFO L85 PathProgramCache]: Analyzing trace with hash -8752847, now seen corresponding path program 13 times [2024-06-21 16:06:37,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:06:37,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382551879] [2024-06-21 16:06:37,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:06:37,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:06:37,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:06:37,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:06:37,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:06:37,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382551879] [2024-06-21 16:06:37,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382551879] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:06:37,999 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:06:37,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:06:37,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146962546] [2024-06-21 16:06:37,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:06:37,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:06:37,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:06:37,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:06:37,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:06:38,041 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 16:06:38,042 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 612 places, 780 transitions, 12067 flow. Second operand has 9 states, 9 states have (on average 16.77777777777778) internal successors, (151), 9 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:06:38,042 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:06:38,042 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 16:06:38,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:06:39,895 INFO L124 PetriNetUnfolderBase]: 3212/5521 cut-off events. [2024-06-21 16:06:39,896 INFO L125 PetriNetUnfolderBase]: For 611292/611294 co-relation queries the response was YES. [2024-06-21 16:06:39,983 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41149 conditions, 5521 events. 3212/5521 cut-off events. For 611292/611294 co-relation queries the response was YES. Maximal size of possible extension queue 544. Compared 38457 event pairs, 514 based on Foata normal form. 3/5523 useless extension candidates. Maximal degree in co-relation 40906. Up to 4560 conditions per place. [2024-06-21 16:06:40,003 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 557 selfloop transitions, 250 changer transitions 0/815 dead transitions. [2024-06-21 16:06:40,003 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 622 places, 815 transitions, 14444 flow [2024-06-21 16:06:40,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:06:40,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:06:40,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 258 transitions. [2024-06-21 16:06:40,004 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5720620842572062 [2024-06-21 16:06:40,004 INFO L175 Difference]: Start difference. First operand has 612 places, 780 transitions, 12067 flow. Second operand 11 states and 258 transitions. [2024-06-21 16:06:40,004 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 622 places, 815 transitions, 14444 flow [2024-06-21 16:06:45,623 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 614 places, 815 transitions, 13620 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-21 16:06:45,633 INFO L231 Difference]: Finished difference. Result has 616 places, 789 transitions, 11910 flow [2024-06-21 16:06:45,633 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11261, PETRI_DIFFERENCE_MINUEND_PLACES=604, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=780, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=244, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=533, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=11910, PETRI_PLACES=616, PETRI_TRANSITIONS=789} [2024-06-21 16:06:45,634 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 574 predicate places. [2024-06-21 16:06:45,634 INFO L495 AbstractCegarLoop]: Abstraction has has 616 places, 789 transitions, 11910 flow [2024-06-21 16:06:45,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.77777777777778) internal successors, (151), 9 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:06:45,634 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:06:45,634 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:06:45,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable229 [2024-06-21 16:06:45,634 INFO L420 AbstractCegarLoop]: === Iteration 231 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:06:45,634 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:06:45,635 INFO L85 PathProgramCache]: Analyzing trace with hash 1137979187, now seen corresponding path program 14 times [2024-06-21 16:06:45,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:06:45,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642962733] [2024-06-21 16:06:45,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:06:45,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:06:45,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:06:45,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:06:45,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:06:45,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642962733] [2024-06-21 16:06:45,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642962733] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:06:45,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:06:45,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:06:45,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632772079] [2024-06-21 16:06:45,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:06:45,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:06:45,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:06:45,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:06:45,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:06:45,824 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 16:06:45,824 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 616 places, 789 transitions, 11910 flow. Second operand has 9 states, 9 states have (on average 16.77777777777778) internal successors, (151), 9 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:06:45,824 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:06:45,824 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 16:06:45,824 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:06:47,524 INFO L124 PetriNetUnfolderBase]: 3225/5539 cut-off events. [2024-06-21 16:06:47,525 INFO L125 PetriNetUnfolderBase]: For 627988/627990 co-relation queries the response was YES. [2024-06-21 16:06:47,608 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41151 conditions, 5539 events. 3225/5539 cut-off events. For 627988/627990 co-relation queries the response was YES. Maximal size of possible extension queue 545. Compared 38593 event pairs, 512 based on Foata normal form. 3/5541 useless extension candidates. Maximal degree in co-relation 40906. Up to 4575 conditions per place. [2024-06-21 16:06:47,632 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 556 selfloop transitions, 258 changer transitions 0/822 dead transitions. [2024-06-21 16:06:47,632 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 627 places, 822 transitions, 14261 flow [2024-06-21 16:06:47,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 16:06:47,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 16:06:47,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 276 transitions. [2024-06-21 16:06:47,633 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5609756097560976 [2024-06-21 16:06:47,633 INFO L175 Difference]: Start difference. First operand has 616 places, 789 transitions, 11910 flow. Second operand 12 states and 276 transitions. [2024-06-21 16:06:47,634 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 627 places, 822 transitions, 14261 flow [2024-06-21 16:06:53,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 620 places, 822 transitions, 13739 flow, removed 31 selfloop flow, removed 7 redundant places. [2024-06-21 16:06:53,287 INFO L231 Difference]: Finished difference. Result has 621 places, 795 transitions, 12005 flow [2024-06-21 16:06:53,287 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11402, PETRI_DIFFERENCE_MINUEND_PLACES=609, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=789, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=252, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=537, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=12005, PETRI_PLACES=621, PETRI_TRANSITIONS=795} [2024-06-21 16:06:53,287 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 579 predicate places. [2024-06-21 16:06:53,287 INFO L495 AbstractCegarLoop]: Abstraction has has 621 places, 795 transitions, 12005 flow [2024-06-21 16:06:53,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.77777777777778) internal successors, (151), 9 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:06:53,287 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:06:53,287 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:06:53,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230 [2024-06-21 16:06:53,288 INFO L420 AbstractCegarLoop]: === Iteration 232 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:06:53,288 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:06:53,288 INFO L85 PathProgramCache]: Analyzing trace with hash -1954870861, now seen corresponding path program 15 times [2024-06-21 16:06:53,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:06:53,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160759703] [2024-06-21 16:06:53,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:06:53,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:06:53,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:06:53,402 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:06:53,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:06:53,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160759703] [2024-06-21 16:06:53,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160759703] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:06:53,403 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:06:53,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:06:53,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472501110] [2024-06-21 16:06:53,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:06:53,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:06:53,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:06:53,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:06:53,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:06:53,447 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 16:06:53,447 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 621 places, 795 transitions, 12005 flow. Second operand has 9 states, 9 states have (on average 16.77777777777778) internal successors, (151), 9 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:06:53,448 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:06:53,448 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 16:06:53,448 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:06:55,214 INFO L124 PetriNetUnfolderBase]: 3222/5535 cut-off events. [2024-06-21 16:06:55,214 INFO L125 PetriNetUnfolderBase]: For 625894/625896 co-relation queries the response was YES. [2024-06-21 16:06:55,292 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41050 conditions, 5535 events. 3222/5535 cut-off events. For 625894/625896 co-relation queries the response was YES. Maximal size of possible extension queue 545. Compared 38544 event pairs, 512 based on Foata normal form. 3/5537 useless extension candidates. Maximal degree in co-relation 40804. Up to 4572 conditions per place. [2024-06-21 16:06:55,311 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 552 selfloop transitions, 262 changer transitions 0/822 dead transitions. [2024-06-21 16:06:55,311 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 632 places, 822 transitions, 14265 flow [2024-06-21 16:06:55,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 16:06:55,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 16:06:55,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 274 transitions. [2024-06-21 16:06:55,312 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.556910569105691 [2024-06-21 16:06:55,312 INFO L175 Difference]: Start difference. First operand has 621 places, 795 transitions, 12005 flow. Second operand 12 states and 274 transitions. [2024-06-21 16:06:55,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 632 places, 822 transitions, 14265 flow [2024-06-21 16:07:01,157 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 624 places, 822 transitions, 13742 flow, removed 18 selfloop flow, removed 8 redundant places. [2024-06-21 16:07:01,168 INFO L231 Difference]: Finished difference. Result has 625 places, 795 transitions, 12012 flow [2024-06-21 16:07:01,168 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11482, PETRI_DIFFERENCE_MINUEND_PLACES=613, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=795, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=262, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=533, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=12012, PETRI_PLACES=625, PETRI_TRANSITIONS=795} [2024-06-21 16:07:01,169 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 583 predicate places. [2024-06-21 16:07:01,169 INFO L495 AbstractCegarLoop]: Abstraction has has 625 places, 795 transitions, 12012 flow [2024-06-21 16:07:01,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.77777777777778) internal successors, (151), 9 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:07:01,169 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:07:01,169 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:07:01,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231 [2024-06-21 16:07:01,169 INFO L420 AbstractCegarLoop]: === Iteration 233 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:07:01,169 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:07:01,169 INFO L85 PathProgramCache]: Analyzing trace with hash -1954663471, now seen corresponding path program 16 times [2024-06-21 16:07:01,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:07:01,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584177742] [2024-06-21 16:07:01,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:07:01,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:07:01,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:07:01,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:07:01,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:07:01,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584177742] [2024-06-21 16:07:01,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584177742] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:07:01,289 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:07:01,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:07:01,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105678264] [2024-06-21 16:07:01,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:07:01,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:07:01,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:07:01,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:07:01,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:07:01,350 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 16:07:01,351 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 625 places, 795 transitions, 12012 flow. Second operand has 9 states, 9 states have (on average 16.77777777777778) internal successors, (151), 9 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:07:01,351 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:07:01,351 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 16:07:01,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:07:03,031 INFO L124 PetriNetUnfolderBase]: 3227/5544 cut-off events. [2024-06-21 16:07:03,031 INFO L125 PetriNetUnfolderBase]: For 634047/634049 co-relation queries the response was YES. [2024-06-21 16:07:03,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41157 conditions, 5544 events. 3227/5544 cut-off events. For 634047/634049 co-relation queries the response was YES. Maximal size of possible extension queue 546. Compared 38670 event pairs, 512 based on Foata normal form. 3/5546 useless extension candidates. Maximal degree in co-relation 40910. Up to 4578 conditions per place. [2024-06-21 16:07:03,133 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 552 selfloop transitions, 263 changer transitions 0/823 dead transitions. [2024-06-21 16:07:03,133 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 635 places, 823 transitions, 14039 flow [2024-06-21 16:07:03,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:07:03,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:07:03,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 255 transitions. [2024-06-21 16:07:03,134 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.565410199556541 [2024-06-21 16:07:03,134 INFO L175 Difference]: Start difference. First operand has 625 places, 795 transitions, 12012 flow. Second operand 11 states and 255 transitions. [2024-06-21 16:07:03,134 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 635 places, 823 transitions, 14039 flow [2024-06-21 16:07:09,364 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 624 places, 823 transitions, 13477 flow, removed 6 selfloop flow, removed 11 redundant places. [2024-06-21 16:07:09,373 INFO L231 Difference]: Finished difference. Result has 625 places, 798 transitions, 12033 flow [2024-06-21 16:07:09,373 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11460, PETRI_DIFFERENCE_MINUEND_PLACES=614, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=795, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=260, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=535, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=12033, PETRI_PLACES=625, PETRI_TRANSITIONS=798} [2024-06-21 16:07:09,374 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 583 predicate places. [2024-06-21 16:07:09,374 INFO L495 AbstractCegarLoop]: Abstraction has has 625 places, 798 transitions, 12033 flow [2024-06-21 16:07:09,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.77777777777778) internal successors, (151), 9 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:07:09,374 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:07:09,374 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:07:09,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable232 [2024-06-21 16:07:09,375 INFO L420 AbstractCegarLoop]: === Iteration 234 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:07:09,375 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:07:09,375 INFO L85 PathProgramCache]: Analyzing trace with hash -1960411801, now seen corresponding path program 17 times [2024-06-21 16:07:09,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:07:09,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523531790] [2024-06-21 16:07:09,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:07:09,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:07:09,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:07:09,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:07:09,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:07:09,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523531790] [2024-06-21 16:07:09,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523531790] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:07:09,514 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:07:09,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:07:09,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741663052] [2024-06-21 16:07:09,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:07:09,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:07:09,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:07:09,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:07:09,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:07:09,573 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 16:07:09,573 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 625 places, 798 transitions, 12033 flow. Second operand has 9 states, 9 states have (on average 16.77777777777778) internal successors, (151), 9 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:07:09,573 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:07:09,573 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 16:07:09,573 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:07:11,335 INFO L124 PetriNetUnfolderBase]: 3224/5540 cut-off events. [2024-06-21 16:07:11,335 INFO L125 PetriNetUnfolderBase]: For 631724/631726 co-relation queries the response was YES. [2024-06-21 16:07:11,414 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41021 conditions, 5540 events. 3224/5540 cut-off events. For 631724/631726 co-relation queries the response was YES. Maximal size of possible extension queue 546. Compared 38680 event pairs, 512 based on Foata normal form. 3/5542 useless extension candidates. Maximal degree in co-relation 40773. Up to 4575 conditions per place. [2024-06-21 16:07:11,434 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 556 selfloop transitions, 257 changer transitions 0/821 dead transitions. [2024-06-21 16:07:11,434 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 633 places, 821 transitions, 14003 flow [2024-06-21 16:07:11,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:07:11,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:07:11,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 217 transitions. [2024-06-21 16:07:11,435 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5880758807588076 [2024-06-21 16:07:11,435 INFO L175 Difference]: Start difference. First operand has 625 places, 798 transitions, 12033 flow. Second operand 9 states and 217 transitions. [2024-06-21 16:07:11,435 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 633 places, 821 transitions, 14003 flow [2024-06-21 16:07:17,082 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 625 places, 821 transitions, 13475 flow, removed 14 selfloop flow, removed 8 redundant places. [2024-06-21 16:07:17,092 INFO L231 Difference]: Finished difference. Result has 626 places, 798 transitions, 12025 flow [2024-06-21 16:07:17,092 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11505, PETRI_DIFFERENCE_MINUEND_PLACES=617, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=798, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=257, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=541, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12025, PETRI_PLACES=626, PETRI_TRANSITIONS=798} [2024-06-21 16:07:17,093 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 584 predicate places. [2024-06-21 16:07:17,093 INFO L495 AbstractCegarLoop]: Abstraction has has 626 places, 798 transitions, 12025 flow [2024-06-21 16:07:17,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.77777777777778) internal successors, (151), 9 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:07:17,093 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:07:17,093 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:07:17,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable233 [2024-06-21 16:07:17,093 INFO L420 AbstractCegarLoop]: === Iteration 235 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:07:17,094 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:07:17,094 INFO L85 PathProgramCache]: Analyzing trace with hash 1355097061, now seen corresponding path program 18 times [2024-06-21 16:07:17,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:07:17,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138482414] [2024-06-21 16:07:17,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:07:17,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:07:17,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:07:17,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:07:17,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:07:17,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138482414] [2024-06-21 16:07:17,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138482414] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:07:17,201 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:07:17,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:07:17,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961416811] [2024-06-21 16:07:17,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:07:17,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:07:17,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:07:17,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:07:17,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:07:17,279 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 16:07:17,279 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 626 places, 798 transitions, 12025 flow. Second operand has 9 states, 9 states have (on average 16.77777777777778) internal successors, (151), 9 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:07:17,279 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:07:17,279 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 16:07:17,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:07:18,845 INFO L124 PetriNetUnfolderBase]: 3221/5536 cut-off events. [2024-06-21 16:07:18,845 INFO L125 PetriNetUnfolderBase]: For 629300/629302 co-relation queries the response was YES. [2024-06-21 16:07:18,927 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40883 conditions, 5536 events. 3221/5536 cut-off events. For 629300/629302 co-relation queries the response was YES. Maximal size of possible extension queue 546. Compared 38641 event pairs, 512 based on Foata normal form. 3/5538 useless extension candidates. Maximal degree in co-relation 40634. Up to 4572 conditions per place. [2024-06-21 16:07:18,948 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 553 selfloop transitions, 259 changer transitions 0/820 dead transitions. [2024-06-21 16:07:18,948 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 634 places, 820 transitions, 13703 flow [2024-06-21 16:07:18,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:07:18,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:07:18,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 216 transitions. [2024-06-21 16:07:18,949 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-21 16:07:18,949 INFO L175 Difference]: Start difference. First operand has 626 places, 798 transitions, 12025 flow. Second operand 9 states and 216 transitions. [2024-06-21 16:07:18,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 634 places, 820 transitions, 13703 flow [2024-06-21 16:07:24,994 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 625 places, 820 transitions, 13157 flow, removed 7 selfloop flow, removed 9 redundant places. [2024-06-21 16:07:25,004 INFO L231 Difference]: Finished difference. Result has 626 places, 798 transitions, 12003 flow [2024-06-21 16:07:25,004 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11479, PETRI_DIFFERENCE_MINUEND_PLACES=617, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=798, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=259, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=539, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12003, PETRI_PLACES=626, PETRI_TRANSITIONS=798} [2024-06-21 16:07:25,004 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 584 predicate places. [2024-06-21 16:07:25,004 INFO L495 AbstractCegarLoop]: Abstraction has has 626 places, 798 transitions, 12003 flow [2024-06-21 16:07:25,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.77777777777778) internal successors, (151), 9 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:07:25,005 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:07:25,005 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:07:25,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable234 [2024-06-21 16:07:25,005 INFO L420 AbstractCegarLoop]: === Iteration 236 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:07:25,005 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:07:25,005 INFO L85 PathProgramCache]: Analyzing trace with hash -1909047631, now seen corresponding path program 19 times [2024-06-21 16:07:25,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:07:25,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655634324] [2024-06-21 16:07:25,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:07:25,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:07:25,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:07:25,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:07:25,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:07:25,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655634324] [2024-06-21 16:07:25,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655634324] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:07:25,124 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:07:25,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:07:25,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35710674] [2024-06-21 16:07:25,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:07:25,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:07:25,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:07:25,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:07:25,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:07:25,184 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 16:07:25,184 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 626 places, 798 transitions, 12003 flow. Second operand has 9 states, 9 states have (on average 16.77777777777778) internal successors, (151), 9 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:07:25,185 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:07:25,185 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 16:07:25,185 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:07:27,055 INFO L124 PetriNetUnfolderBase]: 3274/5623 cut-off events. [2024-06-21 16:07:27,055 INFO L125 PetriNetUnfolderBase]: For 701781/701783 co-relation queries the response was YES. [2024-06-21 16:07:27,140 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42368 conditions, 5623 events. 3274/5623 cut-off events. For 701781/701783 co-relation queries the response was YES. Maximal size of possible extension queue 551. Compared 39331 event pairs, 512 based on Foata normal form. 3/5625 useless extension candidates. Maximal degree in co-relation 42118. Up to 4541 conditions per place. [2024-06-21 16:07:27,161 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 504 selfloop transitions, 330 changer transitions 0/842 dead transitions. [2024-06-21 16:07:27,161 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 636 places, 842 transitions, 14648 flow [2024-06-21 16:07:27,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:07:27,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:07:27,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 253 transitions. [2024-06-21 16:07:27,162 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5609756097560976 [2024-06-21 16:07:27,162 INFO L175 Difference]: Start difference. First operand has 626 places, 798 transitions, 12003 flow. Second operand 11 states and 253 transitions. [2024-06-21 16:07:27,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 636 places, 842 transitions, 14648 flow [2024-06-21 16:07:33,998 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 627 places, 842 transitions, 14104 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-21 16:07:34,008 INFO L231 Difference]: Finished difference. Result has 629 places, 819 transitions, 12576 flow [2024-06-21 16:07:34,008 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11459, PETRI_DIFFERENCE_MINUEND_PLACES=617, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=798, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=318, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=477, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=12576, PETRI_PLACES=629, PETRI_TRANSITIONS=819} [2024-06-21 16:07:34,008 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 587 predicate places. [2024-06-21 16:07:34,009 INFO L495 AbstractCegarLoop]: Abstraction has has 629 places, 819 transitions, 12576 flow [2024-06-21 16:07:34,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.77777777777778) internal successors, (151), 9 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:07:34,009 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:07:34,009 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:07:34,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable235 [2024-06-21 16:07:34,009 INFO L420 AbstractCegarLoop]: === Iteration 237 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:07:34,009 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:07:34,009 INFO L85 PathProgramCache]: Analyzing trace with hash 1611618271, now seen corresponding path program 20 times [2024-06-21 16:07:34,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:07:34,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238330685] [2024-06-21 16:07:34,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:07:34,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:07:34,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:07:34,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:07:34,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:07:34,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238330685] [2024-06-21 16:07:34,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238330685] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:07:34,131 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:07:34,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:07:34,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926403165] [2024-06-21 16:07:34,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:07:34,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:07:34,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:07:34,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:07:34,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:07:34,191 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 16:07:34,192 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 629 places, 819 transitions, 12576 flow. Second operand has 9 states, 9 states have (on average 16.77777777777778) internal successors, (151), 9 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:07:34,192 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:07:34,192 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 16:07:34,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:07:35,905 INFO L124 PetriNetUnfolderBase]: 3279/5631 cut-off events. [2024-06-21 16:07:35,905 INFO L125 PetriNetUnfolderBase]: For 710593/710593 co-relation queries the response was YES. [2024-06-21 16:07:35,992 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42811 conditions, 5631 events. 3279/5631 cut-off events. For 710593/710593 co-relation queries the response was YES. Maximal size of possible extension queue 552. Compared 39390 event pairs, 503 based on Foata normal form. 1/5631 useless extension candidates. Maximal degree in co-relation 42559. Up to 4946 conditions per place. [2024-06-21 16:07:36,013 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 778 selfloop transitions, 55 changer transitions 0/841 dead transitions. [2024-06-21 16:07:36,013 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 637 places, 841 transitions, 14344 flow [2024-06-21 16:07:36,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:07:36,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:07:36,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 205 transitions. [2024-06-21 16:07:36,014 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5555555555555556 [2024-06-21 16:07:36,014 INFO L175 Difference]: Start difference. First operand has 629 places, 819 transitions, 12576 flow. Second operand 9 states and 205 transitions. [2024-06-21 16:07:36,014 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 637 places, 841 transitions, 14344 flow [2024-06-21 16:07:43,869 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 631 places, 841 transitions, 13904 flow, removed 70 selfloop flow, removed 6 redundant places. [2024-06-21 16:07:43,879 INFO L231 Difference]: Finished difference. Result has 632 places, 822 transitions, 12314 flow [2024-06-21 16:07:43,880 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12148, PETRI_DIFFERENCE_MINUEND_PLACES=623, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=819, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=764, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12314, PETRI_PLACES=632, PETRI_TRANSITIONS=822} [2024-06-21 16:07:43,880 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 590 predicate places. [2024-06-21 16:07:43,880 INFO L495 AbstractCegarLoop]: Abstraction has has 632 places, 822 transitions, 12314 flow [2024-06-21 16:07:43,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.77777777777778) internal successors, (151), 9 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:07:43,880 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:07:43,880 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:07:43,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable236 [2024-06-21 16:07:43,880 INFO L420 AbstractCegarLoop]: === Iteration 238 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:07:43,880 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:07:43,880 INFO L85 PathProgramCache]: Analyzing trace with hash 1759227871, now seen corresponding path program 21 times [2024-06-21 16:07:43,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:07:43,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515206834] [2024-06-21 16:07:43,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:07:43,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:07:43,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:07:43,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:07:43,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:07:43,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515206834] [2024-06-21 16:07:43,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515206834] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:07:43,986 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:07:43,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:07:43,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762040624] [2024-06-21 16:07:43,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:07:43,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:07:43,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:07:43,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:07:43,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:07:44,030 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 16:07:44,030 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 632 places, 822 transitions, 12314 flow. Second operand has 9 states, 9 states have (on average 16.77777777777778) internal successors, (151), 9 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:07:44,030 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:07:44,031 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 16:07:44,031 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:07:45,756 INFO L124 PetriNetUnfolderBase]: 3276/5632 cut-off events. [2024-06-21 16:07:45,756 INFO L125 PetriNetUnfolderBase]: For 706826/706828 co-relation queries the response was YES. [2024-06-21 16:07:45,838 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42564 conditions, 5632 events. 3276/5632 cut-off events. For 706826/706828 co-relation queries the response was YES. Maximal size of possible extension queue 553. Compared 39429 event pairs, 514 based on Foata normal form. 3/5634 useless extension candidates. Maximal degree in co-relation 42310. Up to 4544 conditions per place. [2024-06-21 16:07:45,856 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 505 selfloop transitions, 334 changer transitions 0/847 dead transitions. [2024-06-21 16:07:45,857 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 644 places, 847 transitions, 14642 flow [2024-06-21 16:07:45,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 16:07:45,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 16:07:45,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 291 transitions. [2024-06-21 16:07:45,857 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5459662288930581 [2024-06-21 16:07:45,858 INFO L175 Difference]: Start difference. First operand has 632 places, 822 transitions, 12314 flow. Second operand 13 states and 291 transitions. [2024-06-21 16:07:45,858 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 644 places, 847 transitions, 14642 flow [2024-06-21 16:07:53,091 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 637 places, 847 transitions, 14516 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-21 16:07:53,101 INFO L231 Difference]: Finished difference. Result has 638 places, 822 transitions, 12862 flow [2024-06-21 16:07:53,102 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12188, PETRI_DIFFERENCE_MINUEND_PLACES=625, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=822, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=334, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=488, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=12862, PETRI_PLACES=638, PETRI_TRANSITIONS=822} [2024-06-21 16:07:53,102 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 596 predicate places. [2024-06-21 16:07:53,102 INFO L495 AbstractCegarLoop]: Abstraction has has 638 places, 822 transitions, 12862 flow [2024-06-21 16:07:53,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.77777777777778) internal successors, (151), 9 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:07:53,102 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:07:53,102 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:07:53,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable237 [2024-06-21 16:07:53,102 INFO L420 AbstractCegarLoop]: === Iteration 239 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:07:53,103 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:07:53,103 INFO L85 PathProgramCache]: Analyzing trace with hash 837522101, now seen corresponding path program 22 times [2024-06-21 16:07:53,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:07:53,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596662875] [2024-06-21 16:07:53,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:07:53,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:07:53,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:07:53,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:07:53,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:07:53,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596662875] [2024-06-21 16:07:53,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596662875] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:07:53,216 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:07:53,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:07:53,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943681896] [2024-06-21 16:07:53,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:07:53,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:07:53,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:07:53,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:07:53,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:07:53,286 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 16:07:53,286 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 638 places, 822 transitions, 12862 flow. Second operand has 9 states, 9 states have (on average 16.77777777777778) internal successors, (151), 9 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:07:53,286 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:07:53,286 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 16:07:53,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:07:54,934 INFO L124 PetriNetUnfolderBase]: 3281/5637 cut-off events. [2024-06-21 16:07:54,934 INFO L125 PetriNetUnfolderBase]: For 717985/717987 co-relation queries the response was YES. [2024-06-21 16:07:55,020 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43262 conditions, 5637 events. 3281/5637 cut-off events. For 717985/717987 co-relation queries the response was YES. Maximal size of possible extension queue 553. Compared 39443 event pairs, 512 based on Foata normal form. 3/5639 useless extension candidates. Maximal degree in co-relation 43007. Up to 4550 conditions per place. [2024-06-21 16:07:55,041 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 525 selfloop transitions, 315 changer transitions 0/848 dead transitions. [2024-06-21 16:07:55,041 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 647 places, 848 transitions, 15540 flow [2024-06-21 16:07:55,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:07:55,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:07:55,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 237 transitions. [2024-06-21 16:07:55,042 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5780487804878048 [2024-06-21 16:07:55,042 INFO L175 Difference]: Start difference. First operand has 638 places, 822 transitions, 12862 flow. Second operand 10 states and 237 transitions. [2024-06-21 16:07:55,042 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 647 places, 848 transitions, 15540 flow [2024-06-21 16:08:02,495 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 636 places, 848 transitions, 14852 flow, removed 7 selfloop flow, removed 11 redundant places. [2024-06-21 16:08:02,505 INFO L231 Difference]: Finished difference. Result has 637 places, 825 transitions, 12860 flow [2024-06-21 16:08:02,505 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12180, PETRI_DIFFERENCE_MINUEND_PLACES=627, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=822, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=312, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=510, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12860, PETRI_PLACES=637, PETRI_TRANSITIONS=825} [2024-06-21 16:08:02,505 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 595 predicate places. [2024-06-21 16:08:02,505 INFO L495 AbstractCegarLoop]: Abstraction has has 637 places, 825 transitions, 12860 flow [2024-06-21 16:08:02,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.77777777777778) internal successors, (151), 9 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:08:02,505 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:08:02,505 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:08:02,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable238 [2024-06-21 16:08:02,506 INFO L420 AbstractCegarLoop]: === Iteration 240 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:08:02,506 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:08:02,506 INFO L85 PathProgramCache]: Analyzing trace with hash 464858867, now seen corresponding path program 23 times [2024-06-21 16:08:02,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:08:02,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746913389] [2024-06-21 16:08:02,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:08:02,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:08:02,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:08:02,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:08:02,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:08:02,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746913389] [2024-06-21 16:08:02,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746913389] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:08:02,630 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:08:02,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:08:02,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374768625] [2024-06-21 16:08:02,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:08:02,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:08:02,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:08:02,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:08:02,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:08:02,692 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 16:08:02,693 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 637 places, 825 transitions, 12860 flow. Second operand has 9 states, 9 states have (on average 16.77777777777778) internal successors, (151), 9 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:08:02,693 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:08:02,693 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 16:08:02,693 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:08:04,438 INFO L124 PetriNetUnfolderBase]: 3278/5632 cut-off events. [2024-06-21 16:08:04,438 INFO L125 PetriNetUnfolderBase]: For 714945/714945 co-relation queries the response was YES. [2024-06-21 16:08:04,520 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43086 conditions, 5632 events. 3278/5632 cut-off events. For 714945/714945 co-relation queries the response was YES. Maximal size of possible extension queue 553. Compared 39395 event pairs, 503 based on Foata normal form. 1/5632 useless extension candidates. Maximal degree in co-relation 42830. Up to 4924 conditions per place. [2024-06-21 16:08:04,538 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 770 selfloop transitions, 69 changer transitions 0/847 dead transitions. [2024-06-21 16:08:04,538 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 647 places, 847 transitions, 14890 flow [2024-06-21 16:08:04,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:08:04,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:08:04,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 248 transitions. [2024-06-21 16:08:04,539 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.549889135254989 [2024-06-21 16:08:04,539 INFO L175 Difference]: Start difference. First operand has 637 places, 825 transitions, 12860 flow. Second operand 11 states and 248 transitions. [2024-06-21 16:08:04,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 647 places, 847 transitions, 14890 flow [2024-06-21 16:08:11,731 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 640 places, 847 transitions, 14129 flow, removed 23 selfloop flow, removed 7 redundant places. [2024-06-21 16:08:11,740 INFO L231 Difference]: Finished difference. Result has 641 places, 825 transitions, 12243 flow [2024-06-21 16:08:11,741 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12099, PETRI_DIFFERENCE_MINUEND_PLACES=630, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=825, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=756, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=12243, PETRI_PLACES=641, PETRI_TRANSITIONS=825} [2024-06-21 16:08:11,741 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 599 predicate places. [2024-06-21 16:08:11,741 INFO L495 AbstractCegarLoop]: Abstraction has has 641 places, 825 transitions, 12243 flow [2024-06-21 16:08:11,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.77777777777778) internal successors, (151), 9 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:08:11,741 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:08:11,741 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:08:11,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable239 [2024-06-21 16:08:11,741 INFO L420 AbstractCegarLoop]: === Iteration 241 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:08:11,742 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:08:11,742 INFO L85 PathProgramCache]: Analyzing trace with hash -1120554783, now seen corresponding path program 24 times [2024-06-21 16:08:11,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:08:11,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351150801] [2024-06-21 16:08:11,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:08:11,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:08:11,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:08:11,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:08:11,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:08:11,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351150801] [2024-06-21 16:08:11,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351150801] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:08:11,843 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:08:11,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:08:11,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42777300] [2024-06-21 16:08:11,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:08:11,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:08:11,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:08:11,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:08:11,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:08:11,883 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 16:08:11,883 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 641 places, 825 transitions, 12243 flow. Second operand has 9 states, 9 states have (on average 16.77777777777778) internal successors, (151), 9 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:08:11,883 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:08:11,883 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 16:08:11,883 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:08:13,501 INFO L124 PetriNetUnfolderBase]: 3299/5668 cut-off events. [2024-06-21 16:08:13,502 INFO L125 PetriNetUnfolderBase]: For 745729/745731 co-relation queries the response was YES. [2024-06-21 16:08:13,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42682 conditions, 5668 events. 3299/5668 cut-off events. For 745729/745731 co-relation queries the response was YES. Maximal size of possible extension queue 557. Compared 39749 event pairs, 512 based on Foata normal form. 3/5670 useless extension candidates. Maximal degree in co-relation 42427. Up to 4571 conditions per place. [2024-06-21 16:08:13,606 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 524 selfloop transitions, 325 changer transitions 0/857 dead transitions. [2024-06-21 16:08:13,606 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 650 places, 857 transitions, 15039 flow [2024-06-21 16:08:13,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:08:13,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:08:13,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 237 transitions. [2024-06-21 16:08:13,607 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5780487804878048 [2024-06-21 16:08:13,607 INFO L175 Difference]: Start difference. First operand has 641 places, 825 transitions, 12243 flow. Second operand 10 states and 237 transitions. [2024-06-21 16:08:13,607 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 650 places, 857 transitions, 15039 flow [2024-06-21 16:08:22,099 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 643 places, 857 transitions, 14909 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-21 16:08:22,109 INFO L231 Difference]: Finished difference. Result has 644 places, 834 transitions, 12907 flow [2024-06-21 16:08:22,109 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12116, PETRI_DIFFERENCE_MINUEND_PLACES=634, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=825, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=316, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=509, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12907, PETRI_PLACES=644, PETRI_TRANSITIONS=834} [2024-06-21 16:08:22,110 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 602 predicate places. [2024-06-21 16:08:22,110 INFO L495 AbstractCegarLoop]: Abstraction has has 644 places, 834 transitions, 12907 flow [2024-06-21 16:08:22,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.77777777777778) internal successors, (151), 9 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:08:22,110 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:08:22,110 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:08:22,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240 [2024-06-21 16:08:22,110 INFO L420 AbstractCegarLoop]: === Iteration 242 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:08:22,110 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:08:22,110 INFO L85 PathProgramCache]: Analyzing trace with hash 660390581, now seen corresponding path program 25 times [2024-06-21 16:08:22,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:08:22,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773282053] [2024-06-21 16:08:22,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:08:22,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:08:22,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:08:22,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:08:22,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:08:22,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773282053] [2024-06-21 16:08:22,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773282053] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:08:22,223 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:08:22,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:08:22,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680987055] [2024-06-21 16:08:22,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:08:22,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:08:22,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:08:22,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:08:22,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:08:22,322 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 16:08:22,323 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 644 places, 834 transitions, 12907 flow. Second operand has 9 states, 9 states have (on average 16.77777777777778) internal successors, (151), 9 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:08:22,323 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:08:22,323 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 16:08:22,323 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:08:24,112 INFO L124 PetriNetUnfolderBase]: 3296/5663 cut-off events. [2024-06-21 16:08:24,112 INFO L125 PetriNetUnfolderBase]: For 745550/745550 co-relation queries the response was YES. [2024-06-21 16:08:24,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43102 conditions, 5663 events. 3296/5663 cut-off events. For 745550/745550 co-relation queries the response was YES. Maximal size of possible extension queue 557. Compared 39670 event pairs, 503 based on Foata normal form. 1/5663 useless extension candidates. Maximal degree in co-relation 42846. Up to 4948 conditions per place. [2024-06-21 16:08:24,219 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 773 selfloop transitions, 73 changer transitions 0/854 dead transitions. [2024-06-21 16:08:24,219 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 652 places, 854 transitions, 14951 flow [2024-06-21 16:08:24,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:08:24,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:08:24,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 209 transitions. [2024-06-21 16:08:24,220 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5663956639566395 [2024-06-21 16:08:24,220 INFO L175 Difference]: Start difference. First operand has 644 places, 834 transitions, 12907 flow. Second operand 9 states and 209 transitions. [2024-06-21 16:08:24,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 652 places, 854 transitions, 14951 flow [2024-06-21 16:08:30,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 646 places, 854 transitions, 14370 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-21 16:08:30,690 INFO L231 Difference]: Finished difference. Result has 647 places, 834 transitions, 12478 flow [2024-06-21 16:08:30,691 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12326, PETRI_DIFFERENCE_MINUEND_PLACES=638, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=834, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=761, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12478, PETRI_PLACES=647, PETRI_TRANSITIONS=834} [2024-06-21 16:08:30,691 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 605 predicate places. [2024-06-21 16:08:30,691 INFO L495 AbstractCegarLoop]: Abstraction has has 647 places, 834 transitions, 12478 flow [2024-06-21 16:08:30,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.77777777777778) internal successors, (151), 9 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:08:30,691 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:08:30,691 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:08:30,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable241 [2024-06-21 16:08:30,691 INFO L420 AbstractCegarLoop]: === Iteration 243 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:08:30,692 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:08:30,692 INFO L85 PathProgramCache]: Analyzing trace with hash -1010533093, now seen corresponding path program 26 times [2024-06-21 16:08:30,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:08:30,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351984637] [2024-06-21 16:08:30,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:08:30,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:08:30,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:08:30,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:08:30,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:08:30,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351984637] [2024-06-21 16:08:30,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351984637] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:08:30,807 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:08:30,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:08:30,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632415913] [2024-06-21 16:08:30,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:08:30,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:08:30,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:08:30,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:08:30,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:08:30,854 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 16:08:30,855 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 647 places, 834 transitions, 12478 flow. Second operand has 9 states, 9 states have (on average 16.77777777777778) internal successors, (151), 9 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:08:30,855 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:08:30,855 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 16:08:30,855 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:08:32,487 INFO L124 PetriNetUnfolderBase]: 3293/5660 cut-off events. [2024-06-21 16:08:32,487 INFO L125 PetriNetUnfolderBase]: For 741649/741651 co-relation queries the response was YES. [2024-06-21 16:08:32,572 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42481 conditions, 5660 events. 3293/5660 cut-off events. For 741649/741651 co-relation queries the response was YES. Maximal size of possible extension queue 557. Compared 39664 event pairs, 512 based on Foata normal form. 3/5662 useless extension candidates. Maximal degree in co-relation 42224. Up to 4565 conditions per place. [2024-06-21 16:08:32,592 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 522 selfloop transitions, 329 changer transitions 0/859 dead transitions. [2024-06-21 16:08:32,592 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 658 places, 859 transitions, 15156 flow [2024-06-21 16:08:32,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 16:08:32,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 16:08:32,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 277 transitions. [2024-06-21 16:08:32,593 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5630081300813008 [2024-06-21 16:08:32,593 INFO L175 Difference]: Start difference. First operand has 647 places, 834 transitions, 12478 flow. Second operand 12 states and 277 transitions. [2024-06-21 16:08:32,593 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 658 places, 859 transitions, 15156 flow [2024-06-21 16:08:40,278 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 651 places, 859 transitions, 14906 flow, removed 20 selfloop flow, removed 7 redundant places. [2024-06-21 16:08:40,288 INFO L231 Difference]: Finished difference. Result has 652 places, 834 transitions, 12892 flow [2024-06-21 16:08:40,288 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12228, PETRI_DIFFERENCE_MINUEND_PLACES=640, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=834, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=329, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=505, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=12892, PETRI_PLACES=652, PETRI_TRANSITIONS=834} [2024-06-21 16:08:40,288 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 610 predicate places. [2024-06-21 16:08:40,288 INFO L495 AbstractCegarLoop]: Abstraction has has 652 places, 834 transitions, 12892 flow [2024-06-21 16:08:40,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.77777777777778) internal successors, (151), 9 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:08:40,289 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:08:40,289 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:08:40,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable242 [2024-06-21 16:08:40,289 INFO L420 AbstractCegarLoop]: === Iteration 244 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:08:40,289 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:08:40,289 INFO L85 PathProgramCache]: Analyzing trace with hash -1010740483, now seen corresponding path program 27 times [2024-06-21 16:08:40,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:08:40,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182744055] [2024-06-21 16:08:40,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:08:40,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:08:40,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:08:40,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:08:40,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:08:40,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182744055] [2024-06-21 16:08:40,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182744055] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:08:40,402 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:08:40,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:08:40,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340268800] [2024-06-21 16:08:40,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:08:40,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:08:40,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:08:40,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:08:40,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:08:40,458 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 16:08:40,459 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 652 places, 834 transitions, 12892 flow. Second operand has 9 states, 9 states have (on average 16.77777777777778) internal successors, (151), 9 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:08:40,459 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:08:40,459 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 16:08:40,459 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:08:42,252 INFO L124 PetriNetUnfolderBase]: 3298/5669 cut-off events. [2024-06-21 16:08:42,252 INFO L125 PetriNetUnfolderBase]: For 753030/753032 co-relation queries the response was YES. [2024-06-21 16:08:42,334 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42924 conditions, 5669 events. 3298/5669 cut-off events. For 753030/753032 co-relation queries the response was YES. Maximal size of possible extension queue 558. Compared 39740 event pairs, 512 based on Foata normal form. 3/5671 useless extension candidates. Maximal degree in co-relation 42667. Up to 4571 conditions per place. [2024-06-21 16:08:42,352 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 520 selfloop transitions, 334 changer transitions 0/862 dead transitions. [2024-06-21 16:08:42,352 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 664 places, 862 transitions, 15324 flow [2024-06-21 16:08:42,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 16:08:42,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 16:08:42,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 294 transitions. [2024-06-21 16:08:42,353 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.551594746716698 [2024-06-21 16:08:42,353 INFO L175 Difference]: Start difference. First operand has 652 places, 834 transitions, 12892 flow. Second operand 13 states and 294 transitions. [2024-06-21 16:08:42,353 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 664 places, 862 transitions, 15324 flow [2024-06-21 16:08:49,762 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 653 places, 862 transitions, 14606 flow, removed 0 selfloop flow, removed 11 redundant places. [2024-06-21 16:08:49,772 INFO L231 Difference]: Finished difference. Result has 654 places, 837 transitions, 12898 flow [2024-06-21 16:08:49,773 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12180, PETRI_DIFFERENCE_MINUEND_PLACES=641, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=834, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=331, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=503, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=12898, PETRI_PLACES=654, PETRI_TRANSITIONS=837} [2024-06-21 16:08:49,773 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 612 predicate places. [2024-06-21 16:08:49,773 INFO L495 AbstractCegarLoop]: Abstraction has has 654 places, 837 transitions, 12898 flow [2024-06-21 16:08:49,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.77777777777778) internal successors, (151), 9 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:08:49,773 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:08:49,773 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:08:49,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable243 [2024-06-21 16:08:49,773 INFO L420 AbstractCegarLoop]: === Iteration 245 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:08:49,774 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:08:49,774 INFO L85 PathProgramCache]: Analyzing trace with hash -1022710513, now seen corresponding path program 28 times [2024-06-21 16:08:49,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:08:49,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589372394] [2024-06-21 16:08:49,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:08:49,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:08:49,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:08:49,878 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:08:49,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:08:49,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589372394] [2024-06-21 16:08:49,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589372394] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:08:49,879 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:08:49,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:08:49,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423858358] [2024-06-21 16:08:49,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:08:49,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:08:49,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:08:49,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:08:49,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:08:49,933 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 16:08:49,933 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 654 places, 837 transitions, 12898 flow. Second operand has 9 states, 9 states have (on average 16.77777777777778) internal successors, (151), 9 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:08:49,933 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:08:49,933 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 16:08:49,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:08:51,636 INFO L124 PetriNetUnfolderBase]: 3295/5665 cut-off events. [2024-06-21 16:08:51,636 INFO L125 PetriNetUnfolderBase]: For 750008/750010 co-relation queries the response was YES. [2024-06-21 16:08:51,723 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42787 conditions, 5665 events. 3295/5665 cut-off events. For 750008/750010 co-relation queries the response was YES. Maximal size of possible extension queue 558. Compared 39713 event pairs, 512 based on Foata normal form. 3/5667 useless extension candidates. Maximal degree in co-relation 42529. Up to 4568 conditions per place. [2024-06-21 16:08:51,743 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 524 selfloop transitions, 330 changer transitions 0/862 dead transitions. [2024-06-21 16:08:51,743 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 665 places, 862 transitions, 15594 flow [2024-06-21 16:08:51,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 16:08:51,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 16:08:51,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 277 transitions. [2024-06-21 16:08:51,744 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5630081300813008 [2024-06-21 16:08:51,744 INFO L175 Difference]: Start difference. First operand has 654 places, 837 transitions, 12898 flow. Second operand 12 states and 277 transitions. [2024-06-21 16:08:51,744 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 665 places, 862 transitions, 15594 flow [2024-06-21 16:08:58,799 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 655 places, 862 transitions, 14938 flow, removed 14 selfloop flow, removed 10 redundant places. [2024-06-21 16:08:58,809 INFO L231 Difference]: Finished difference. Result has 656 places, 837 transitions, 12908 flow [2024-06-21 16:08:58,809 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12242, PETRI_DIFFERENCE_MINUEND_PLACES=644, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=837, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=330, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=507, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=12908, PETRI_PLACES=656, PETRI_TRANSITIONS=837} [2024-06-21 16:08:58,809 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 614 predicate places. [2024-06-21 16:08:58,809 INFO L495 AbstractCegarLoop]: Abstraction has has 656 places, 837 transitions, 12908 flow [2024-06-21 16:08:58,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.77777777777778) internal successors, (151), 9 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:08:58,809 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:08:58,809 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:08:58,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable244 [2024-06-21 16:08:58,810 INFO L420 AbstractCegarLoop]: === Iteration 246 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:08:58,810 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:08:58,810 INFO L85 PathProgramCache]: Analyzing trace with hash 1831085087, now seen corresponding path program 29 times [2024-06-21 16:08:58,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:08:58,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816010130] [2024-06-21 16:08:58,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:08:58,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:08:58,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:08:58,913 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:08:58,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:08:58,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816010130] [2024-06-21 16:08:58,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816010130] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:08:58,914 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:08:58,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:08:58,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184867472] [2024-06-21 16:08:58,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:08:58,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:08:58,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:08:58,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:08:58,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:08:58,958 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 16:08:58,958 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 656 places, 837 transitions, 12908 flow. Second operand has 9 states, 9 states have (on average 16.77777777777778) internal successors, (151), 9 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:08:58,958 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:08:58,958 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 16:08:58,958 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:09:00,693 INFO L124 PetriNetUnfolderBase]: 3292/5661 cut-off events. [2024-06-21 16:09:00,693 INFO L125 PetriNetUnfolderBase]: For 746804/746806 co-relation queries the response was YES. [2024-06-21 16:09:00,779 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42652 conditions, 5661 events. 3292/5661 cut-off events. For 746804/746806 co-relation queries the response was YES. Maximal size of possible extension queue 558. Compared 39729 event pairs, 512 based on Foata normal form. 3/5663 useless extension candidates. Maximal degree in co-relation 42393. Up to 4565 conditions per place. [2024-06-21 16:09:00,799 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 522 selfloop transitions, 332 changer transitions 0/862 dead transitions. [2024-06-21 16:09:00,800 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 668 places, 862 transitions, 15298 flow [2024-06-21 16:09:00,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 16:09:00,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 16:09:00,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 294 transitions. [2024-06-21 16:09:00,800 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.551594746716698 [2024-06-21 16:09:00,800 INFO L175 Difference]: Start difference. First operand has 656 places, 837 transitions, 12908 flow. Second operand 13 states and 294 transitions. [2024-06-21 16:09:00,800 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 668 places, 862 transitions, 15298 flow [2024-06-21 16:09:08,712 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 657 places, 862 transitions, 14560 flow, removed 7 selfloop flow, removed 11 redundant places. [2024-06-21 16:09:08,722 INFO L231 Difference]: Finished difference. Result has 658 places, 837 transitions, 12840 flow [2024-06-21 16:09:08,722 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12170, PETRI_DIFFERENCE_MINUEND_PLACES=645, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=837, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=332, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=505, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=12840, PETRI_PLACES=658, PETRI_TRANSITIONS=837} [2024-06-21 16:09:08,722 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 616 predicate places. [2024-06-21 16:09:08,722 INFO L495 AbstractCegarLoop]: Abstraction has has 658 places, 837 transitions, 12840 flow [2024-06-21 16:09:08,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.77777777777778) internal successors, (151), 9 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:09:08,722 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:09:08,722 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:09:08,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable245 [2024-06-21 16:09:08,722 INFO L420 AbstractCegarLoop]: === Iteration 247 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:09:08,723 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:09:08,723 INFO L85 PathProgramCache]: Analyzing trace with hash -1303635237, now seen corresponding path program 30 times [2024-06-21 16:09:08,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:09:08,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414725833] [2024-06-21 16:09:08,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:09:08,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:09:08,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:09:08,834 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:09:08,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:09:08,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414725833] [2024-06-21 16:09:08,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414725833] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:09:08,834 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:09:08,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:09:08,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677702359] [2024-06-21 16:09:08,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:09:08,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:09:08,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:09:08,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:09:08,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:09:08,889 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 16:09:08,889 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 658 places, 837 transitions, 12840 flow. Second operand has 9 states, 9 states have (on average 16.77777777777778) internal successors, (151), 9 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:09:08,889 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:09:08,889 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 16:09:08,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:09:10,580 INFO L124 PetriNetUnfolderBase]: 3289/5656 cut-off events. [2024-06-21 16:09:10,580 INFO L125 PetriNetUnfolderBase]: For 742081/742081 co-relation queries the response was YES. [2024-06-21 16:09:10,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42489 conditions, 5656 events. 3289/5656 cut-off events. For 742081/742081 co-relation queries the response was YES. Maximal size of possible extension queue 556. Compared 39708 event pairs, 503 based on Foata normal form. 1/5656 useless extension candidates. Maximal degree in co-relation 42229. Up to 4940 conditions per place. [2024-06-21 16:09:10,689 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 777 selfloop transitions, 71 changer transitions 0/856 dead transitions. [2024-06-21 16:09:10,689 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 666 places, 856 transitions, 14582 flow [2024-06-21 16:09:10,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:09:10,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:09:10,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 209 transitions. [2024-06-21 16:09:10,690 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5663956639566395 [2024-06-21 16:09:10,690 INFO L175 Difference]: Start difference. First operand has 658 places, 837 transitions, 12840 flow. Second operand 9 states and 209 transitions. [2024-06-21 16:09:10,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 666 places, 856 transitions, 14582 flow [2024-06-21 16:09:18,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 654 places, 856 transitions, 13892 flow, removed 7 selfloop flow, removed 12 redundant places. [2024-06-21 16:09:18,428 INFO L231 Difference]: Finished difference. Result has 655 places, 837 transitions, 12298 flow [2024-06-21 16:09:18,428 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12150, PETRI_DIFFERENCE_MINUEND_PLACES=646, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=837, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=766, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12298, PETRI_PLACES=655, PETRI_TRANSITIONS=837} [2024-06-21 16:09:18,428 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 613 predicate places. [2024-06-21 16:09:18,428 INFO L495 AbstractCegarLoop]: Abstraction has has 655 places, 837 transitions, 12298 flow [2024-06-21 16:09:18,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.77777777777778) internal successors, (151), 9 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:09:18,428 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:09:18,429 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:09:18,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable246 [2024-06-21 16:09:18,429 INFO L420 AbstractCegarLoop]: === Iteration 248 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:09:18,429 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:09:18,429 INFO L85 PathProgramCache]: Analyzing trace with hash -1743910973, now seen corresponding path program 1 times [2024-06-21 16:09:18,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:09:18,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882293569] [2024-06-21 16:09:18,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:09:18,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:09:18,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:09:18,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:09:18,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:09:18,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882293569] [2024-06-21 16:09:18,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882293569] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:09:18,546 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:09:18,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:09:18,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617853540] [2024-06-21 16:09:18,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:09:18,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:09:18,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:09:18,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:09:18,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:09:18,594 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 16:09:18,594 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 655 places, 837 transitions, 12298 flow. Second operand has 9 states, 9 states have (on average 16.77777777777778) internal successors, (151), 9 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:09:18,594 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:09:18,594 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 16:09:18,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:09:20,371 INFO L124 PetriNetUnfolderBase]: 3355/5765 cut-off events. [2024-06-21 16:09:20,371 INFO L125 PetriNetUnfolderBase]: For 916765/916765 co-relation queries the response was YES. [2024-06-21 16:09:20,456 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44356 conditions, 5765 events. 3355/5765 cut-off events. For 916765/916765 co-relation queries the response was YES. Maximal size of possible extension queue 561. Compared 40501 event pairs, 533 based on Foata normal form. 6/5769 useless extension candidates. Maximal degree in co-relation 44095. Up to 4656 conditions per place. [2024-06-21 16:09:20,477 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 653 selfloop transitions, 215 changer transitions 0/876 dead transitions. [2024-06-21 16:09:20,477 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 663 places, 876 transitions, 14578 flow [2024-06-21 16:09:20,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:09:20,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:09:20,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 225 transitions. [2024-06-21 16:09:20,478 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-21 16:09:20,478 INFO L175 Difference]: Start difference. First operand has 655 places, 837 transitions, 12298 flow. Second operand 9 states and 225 transitions. [2024-06-21 16:09:20,478 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 663 places, 876 transitions, 14578 flow [2024-06-21 16:09:28,753 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 652 places, 876 transitions, 14358 flow, removed 0 selfloop flow, removed 11 redundant places. [2024-06-21 16:09:28,763 INFO L231 Difference]: Finished difference. Result has 653 places, 839 transitions, 12602 flow [2024-06-21 16:09:28,763 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12078, PETRI_DIFFERENCE_MINUEND_PLACES=644, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=837, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=214, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=623, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12602, PETRI_PLACES=653, PETRI_TRANSITIONS=839} [2024-06-21 16:09:28,763 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 611 predicate places. [2024-06-21 16:09:28,763 INFO L495 AbstractCegarLoop]: Abstraction has has 653 places, 839 transitions, 12602 flow [2024-06-21 16:09:28,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.77777777777778) internal successors, (151), 9 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:09:28,763 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:09:28,763 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:09:28,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable247 [2024-06-21 16:09:28,764 INFO L420 AbstractCegarLoop]: === Iteration 249 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:09:28,764 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:09:28,764 INFO L85 PathProgramCache]: Analyzing trace with hash 1294600083, now seen corresponding path program 2 times [2024-06-21 16:09:28,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:09:28,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951610274] [2024-06-21 16:09:28,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:09:28,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:09:28,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:09:28,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:09:28,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:09:28,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951610274] [2024-06-21 16:09:28,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951610274] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:09:28,874 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:09:28,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:09:28,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011480619] [2024-06-21 16:09:28,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:09:28,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:09:28,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:09:28,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:09:28,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:09:28,929 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 16:09:28,930 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 653 places, 839 transitions, 12602 flow. Second operand has 9 states, 9 states have (on average 16.77777777777778) internal successors, (151), 9 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:09:28,930 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:09:28,930 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 16:09:28,930 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:09:30,668 INFO L124 PetriNetUnfolderBase]: 3421/5876 cut-off events. [2024-06-21 16:09:30,668 INFO L125 PetriNetUnfolderBase]: For 1037852/1037852 co-relation queries the response was YES. [2024-06-21 16:09:30,758 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47207 conditions, 5876 events. 3421/5876 cut-off events. For 1037852/1037852 co-relation queries the response was YES. Maximal size of possible extension queue 566. Compared 41380 event pairs, 558 based on Foata normal form. 6/5880 useless extension candidates. Maximal degree in co-relation 46945. Up to 4854 conditions per place. [2024-06-21 16:09:30,780 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 656 selfloop transitions, 210 changer transitions 0/874 dead transitions. [2024-06-21 16:09:30,780 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 661 places, 874 transitions, 14874 flow [2024-06-21 16:09:30,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:09:30,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:09:30,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 222 transitions. [2024-06-21 16:09:30,781 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6016260162601627 [2024-06-21 16:09:30,781 INFO L175 Difference]: Start difference. First operand has 653 places, 839 transitions, 12602 flow. Second operand 9 states and 222 transitions. [2024-06-21 16:09:30,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 661 places, 874 transitions, 14874 flow [2024-06-21 16:09:39,659 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 656 places, 874 transitions, 14570 flow, removed 31 selfloop flow, removed 5 redundant places. [2024-06-21 16:09:39,668 INFO L231 Difference]: Finished difference. Result has 657 places, 841 transitions, 12816 flow [2024-06-21 16:09:39,669 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12314, PETRI_DIFFERENCE_MINUEND_PLACES=648, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=839, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=209, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=630, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12816, PETRI_PLACES=657, PETRI_TRANSITIONS=841} [2024-06-21 16:09:39,669 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 615 predicate places. [2024-06-21 16:09:39,669 INFO L495 AbstractCegarLoop]: Abstraction has has 657 places, 841 transitions, 12816 flow [2024-06-21 16:09:39,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.77777777777778) internal successors, (151), 9 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:09:39,669 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:09:39,669 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:09:39,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable248 [2024-06-21 16:09:39,669 INFO L420 AbstractCegarLoop]: === Iteration 250 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:09:39,669 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:09:39,669 INFO L85 PathProgramCache]: Analyzing trace with hash 1294747953, now seen corresponding path program 3 times [2024-06-21 16:09:39,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:09:39,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087002465] [2024-06-21 16:09:39,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:09:39,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:09:39,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:09:39,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:09:39,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:09:39,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087002465] [2024-06-21 16:09:39,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087002465] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:09:39,798 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:09:39,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:09:39,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436977803] [2024-06-21 16:09:39,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:09:39,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:09:39,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:09:39,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:09:39,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:09:39,839 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 16:09:39,839 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 657 places, 841 transitions, 12816 flow. Second operand has 9 states, 9 states have (on average 16.77777777777778) internal successors, (151), 9 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:09:39,839 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:09:39,839 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 16:09:39,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:09:41,507 INFO L124 PetriNetUnfolderBase]: 3403/5850 cut-off events. [2024-06-21 16:09:41,507 INFO L125 PetriNetUnfolderBase]: For 967907/967907 co-relation queries the response was YES. [2024-06-21 16:09:41,596 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45743 conditions, 5850 events. 3403/5850 cut-off events. For 967907/967907 co-relation queries the response was YES. Maximal size of possible extension queue 566. Compared 41233 event pairs, 556 based on Foata normal form. 8/5856 useless extension candidates. Maximal degree in co-relation 45479. Up to 4876 conditions per place. [2024-06-21 16:09:41,616 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 654 selfloop transitions, 208 changer transitions 0/870 dead transitions. [2024-06-21 16:09:41,616 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 665 places, 870 transitions, 14646 flow [2024-06-21 16:09:41,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:09:41,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:09:41,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 218 transitions. [2024-06-21 16:09:41,617 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5907859078590786 [2024-06-21 16:09:41,617 INFO L175 Difference]: Start difference. First operand has 657 places, 841 transitions, 12816 flow. Second operand 9 states and 218 transitions. [2024-06-21 16:09:41,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 665 places, 870 transitions, 14646 flow [2024-06-21 16:09:51,097 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 660 places, 870 transitions, 14351 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-06-21 16:09:51,107 INFO L231 Difference]: Finished difference. Result has 661 places, 841 transitions, 12942 flow [2024-06-21 16:09:51,107 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12521, PETRI_DIFFERENCE_MINUEND_PLACES=652, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=841, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=208, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=633, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12942, PETRI_PLACES=661, PETRI_TRANSITIONS=841} [2024-06-21 16:09:51,107 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 619 predicate places. [2024-06-21 16:09:51,107 INFO L495 AbstractCegarLoop]: Abstraction has has 661 places, 841 transitions, 12942 flow [2024-06-21 16:09:51,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.77777777777778) internal successors, (151), 9 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:09:51,107 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:09:51,107 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:09:51,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable249 [2024-06-21 16:09:51,108 INFO L420 AbstractCegarLoop]: === Iteration 251 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:09:51,108 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:09:51,108 INFO L85 PathProgramCache]: Analyzing trace with hash -1954655535, now seen corresponding path program 4 times [2024-06-21 16:09:51,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:09:51,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896007589] [2024-06-21 16:09:51,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:09:51,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:09:51,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:09:51,229 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:09:51,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:09:51,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896007589] [2024-06-21 16:09:51,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896007589] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:09:51,229 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:09:51,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:09:51,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420014890] [2024-06-21 16:09:51,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:09:51,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:09:51,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:09:51,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:09:51,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:09:51,276 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 16:09:51,276 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 661 places, 841 transitions, 12942 flow. Second operand has 9 states, 9 states have (on average 16.77777777777778) internal successors, (151), 9 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:09:51,276 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:09:51,276 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 16:09:51,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:09:53,088 INFO L124 PetriNetUnfolderBase]: 3431/5895 cut-off events. [2024-06-21 16:09:53,088 INFO L125 PetriNetUnfolderBase]: For 977510/977512 co-relation queries the response was YES. [2024-06-21 16:09:53,176 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46308 conditions, 5895 events. 3431/5895 cut-off events. For 977510/977512 co-relation queries the response was YES. Maximal size of possible extension queue 569. Compared 41653 event pairs, 548 based on Foata normal form. 10/5904 useless extension candidates. Maximal degree in co-relation 46042. Up to 5094 conditions per place. [2024-06-21 16:09:53,196 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 763 selfloop transitions, 99 changer transitions 0/870 dead transitions. [2024-06-21 16:09:53,196 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 671 places, 870 transitions, 14808 flow [2024-06-21 16:09:53,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:09:53,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:09:53,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 249 transitions. [2024-06-21 16:09:53,197 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5521064301552107 [2024-06-21 16:09:53,197 INFO L175 Difference]: Start difference. First operand has 661 places, 841 transitions, 12942 flow. Second operand 11 states and 249 transitions. [2024-06-21 16:09:53,197 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 671 places, 870 transitions, 14808 flow Killed by 15