./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe004_tso.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2024-05-07_14-17-48.files/protection/safe004_tso.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b44c8288 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/safe004_tso.i ./goblint.2024-05-07_14-17-48.files/protection/safe004_tso.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --- Real Ultimate output --- This is Ultimate 0.2.4-wip.fs.witness-ghost-b44c828-m [2024-05-12 12:38:53,613 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-05-12 12:38:53,682 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-05-12 12:38:53,687 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-05-12 12:38:53,688 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-05-12 12:38:53,712 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-05-12 12:38:53,712 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-05-12 12:38:53,713 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-05-12 12:38:53,713 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-05-12 12:38:53,716 INFO L153 SettingsManager]: * Use memory slicer=true [2024-05-12 12:38:53,717 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-05-12 12:38:53,717 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-05-12 12:38:53,718 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-05-12 12:38:53,719 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-05-12 12:38:53,719 INFO L153 SettingsManager]: * Use SBE=true [2024-05-12 12:38:53,719 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-05-12 12:38:53,719 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-05-12 12:38:53,720 INFO L153 SettingsManager]: * sizeof long=4 [2024-05-12 12:38:53,720 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-05-12 12:38:53,720 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-05-12 12:38:53,721 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-05-12 12:38:53,722 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-05-12 12:38:53,722 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-05-12 12:38:53,722 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-05-12 12:38:53,722 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-05-12 12:38:53,722 INFO L153 SettingsManager]: * sizeof long double=12 [2024-05-12 12:38:53,723 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-05-12 12:38:53,723 INFO L153 SettingsManager]: * Use constant arrays=true [2024-05-12 12:38:53,723 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-05-12 12:38:53,724 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-05-12 12:38:53,724 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-05-12 12:38:53,724 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-05-12 12:38:53,725 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-05-12 12:38:53,725 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-05-12 12:38:53,725 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-05-12 12:38:53,725 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-05-12 12:38:53,725 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-05-12 12:38:53,726 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-05-12 12:38:53,726 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-05-12 12:38:53,726 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-05-12 12:38:53,726 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-05-12 12:38:53,726 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-05-12 12:38:53,727 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-05-12 12:38:53,727 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-05-12 12:38:53,933 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-05-12 12:38:53,965 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-05-12 12:38:53,967 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-05-12 12:38:53,968 INFO L270 PluginConnector]: Initializing CDTParser... [2024-05-12 12:38:53,969 INFO L274 PluginConnector]: CDTParser initialized [2024-05-12 12:38:53,970 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe004_tso.i [2024-05-12 12:38:55,085 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-05-12 12:38:55,307 INFO L384 CDTParser]: Found 1 translation units. [2024-05-12 12:38:55,311 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe004_tso.i [2024-05-12 12:38:55,332 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/89225da85/5a3660e377024c88b8dcdf42766e72a1/FLAGf9c3d8a0f [2024-05-12 12:38:55,638 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/89225da85/5a3660e377024c88b8dcdf42766e72a1 [2024-05-12 12:38:55,640 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-05-12 12:38:55,640 INFO L274 PluginConnector]: Witness Parser initialized [2024-05-12 12:38:55,641 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-07_14-17-48.files/protection/safe004_tso.yml/witness.yml [2024-05-12 12:38:55,746 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-05-12 12:38:55,747 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-05-12 12:38:55,748 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-05-12 12:38:55,748 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-05-12 12:38:55,752 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-05-12 12:38:55,753 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.05 12:38:55" (1/2) ... [2024-05-12 12:38:55,754 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@962053f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 12:38:55, skipping insertion in model container [2024-05-12 12:38:55,755 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.05 12:38:55" (1/2) ... [2024-05-12 12:38:55,756 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@63d5754b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 12:38:55, skipping insertion in model container [2024-05-12 12:38:55,756 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 12.05 12:38:55" (2/2) ... [2024-05-12 12:38:55,757 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@962053f and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 12:38:55, skipping insertion in model container [2024-05-12 12:38:55,757 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 12.05 12:38:55" (2/2) ... [2024-05-12 12:38:55,757 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-05-12 12:38:55,793 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-05-12 12:38:55,795 INFO L97 edCorrectnessWitness]: Location invariant before [L782-L782] ((((! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2))) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 2) && __unbuffered_p2_EBX <= 127) && ((__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1) || __unbuffered_p2_EBX == 2)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2))) [2024-05-12 12:38:55,795 INFO L97 edCorrectnessWitness]: Location invariant before [L779-L779] ((((! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2))) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 2) && __unbuffered_p2_EBX <= 127) && ((__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1) || __unbuffered_p2_EBX == 2)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2))) [2024-05-12 12:38:55,795 INFO L97 edCorrectnessWitness]: Location invariant before [L781-L781] ((((! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2))) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 2) && __unbuffered_p2_EBX <= 127) && ((__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1) || __unbuffered_p2_EBX == 2)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2))) [2024-05-12 12:38:55,795 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-05-12 12:38:55,795 INFO L106 edCorrectnessWitness]: ghost_update [L777-L777] multithreaded = 1; [2024-05-12 12:38:55,831 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-05-12 12:38:55,964 WARN L246 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe004_tso.i[945,958] [2024-05-12 12:38:56,107 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-05-12 12:38:56,115 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local [2024-05-12 12:38:56,145 WARN L246 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe004_tso.i[945,958] Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-05-12 12:38:56,189 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-05-12 12:38:56,237 INFO L206 MainTranslator]: Completed translation [2024-05-12 12:38:56,237 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 12:38:56 WrapperNode [2024-05-12 12:38:56,237 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-05-12 12:38:56,238 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-05-12 12:38:56,238 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-05-12 12:38:56,238 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-05-12 12:38:56,244 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 12:38:56" (1/1) ... [2024-05-12 12:38:56,261 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 12:38:56" (1/1) ... [2024-05-12 12:38:56,294 INFO L138 Inliner]: procedures = 176, calls = 53, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 75 [2024-05-12 12:38:56,295 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-05-12 12:38:56,296 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-05-12 12:38:56,296 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-05-12 12:38:56,297 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-05-12 12:38:56,305 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 12:38:56" (1/1) ... [2024-05-12 12:38:56,305 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 12:38:56" (1/1) ... [2024-05-12 12:38:56,320 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 12:38:56" (1/1) ... [2024-05-12 12:38:56,341 INFO L175 MemorySlicer]: Split 5 memory accesses to 4 slices as follows [2, 1, 1, 1]. 40 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0]. The 3 writes are split as follows [0, 1, 1, 1]. [2024-05-12 12:38:56,342 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 12:38:56" (1/1) ... [2024-05-12 12:38:56,342 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 12:38:56" (1/1) ... [2024-05-12 12:38:56,350 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 12:38:56" (1/1) ... [2024-05-12 12:38:56,355 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 12:38:56" (1/1) ... [2024-05-12 12:38:56,357 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 12:38:56" (1/1) ... [2024-05-12 12:38:56,363 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 12:38:56" (1/1) ... [2024-05-12 12:38:56,366 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-05-12 12:38:56,368 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-05-12 12:38:56,369 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-05-12 12:38:56,369 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-05-12 12:38:56,370 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 12:38:56" (1/1) ... [2024-05-12 12:38:56,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-05-12 12:38:56,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 12:38:56,396 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) [2024-05-12 12:38:56,416 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 [2024-05-12 12:38:56,434 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-05-12 12:38:56,434 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-05-12 12:38:56,434 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-05-12 12:38:56,435 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-05-12 12:38:56,435 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-05-12 12:38:56,435 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-05-12 12:38:56,435 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-05-12 12:38:56,435 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-05-12 12:38:56,436 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-05-12 12:38:56,436 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-05-12 12:38:56,436 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-05-12 12:38:56,436 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-05-12 12:38:56,437 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-05-12 12:38:56,437 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-05-12 12:38:56,437 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-05-12 12:38:56,437 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-05-12 12:38:56,438 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-05-12 12:38:56,438 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-05-12 12:38:56,438 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-05-12 12:38:56,438 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-05-12 12:38:56,439 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-05-12 12:38:56,440 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-05-12 12:38:56,536 INFO L244 CfgBuilder]: Building ICFG [2024-05-12 12:38:56,538 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-05-12 12:38:56,728 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-05-12 12:38:56,728 INFO L293 CfgBuilder]: Performing block encoding [2024-05-12 12:38:56,803 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-05-12 12:38:56,804 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-05-12 12:38:56,804 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.05 12:38:56 BoogieIcfgContainer [2024-05-12 12:38:56,804 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-05-12 12:38:56,806 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-05-12 12:38:56,806 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-05-12 12:38:56,809 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-05-12 12:38:56,809 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.05 12:38:55" (1/4) ... [2024-05-12 12:38:56,810 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54985b4c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.05 12:38:56, skipping insertion in model container [2024-05-12 12:38:56,810 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 12.05 12:38:55" (2/4) ... [2024-05-12 12:38:56,810 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54985b4c and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 12.05 12:38:56, skipping insertion in model container [2024-05-12 12:38:56,810 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 12:38:56" (3/4) ... [2024-05-12 12:38:56,811 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54985b4c and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 12.05 12:38:56, skipping insertion in model container [2024-05-12 12:38:56,811 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.05 12:38:56" (4/4) ... [2024-05-12 12:38:56,812 INFO L112 eAbstractionObserver]: Analyzing ICFG safe004_tso.i [2024-05-12 12:38:56,826 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-05-12 12:38:56,826 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-05-12 12:38:56,826 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-05-12 12:38:56,873 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-05-12 12:38:56,904 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 55 places, 46 transitions, 104 flow [2024-05-12 12:38:56,934 INFO L124 PetriNetUnfolderBase]: 1/43 cut-off events. [2024-05-12 12:38:56,934 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-05-12 12:38:56,937 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53 conditions, 43 events. 1/43 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 68 event pairs, 0 based on Foata normal form. 0/38 useless extension candidates. Maximal degree in co-relation 43. Up to 2 conditions per place. [2024-05-12 12:38:56,937 INFO L82 GeneralOperation]: Start removeDead. Operand has 55 places, 46 transitions, 104 flow [2024-05-12 12:38:56,941 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 50 places, 40 transitions, 89 flow [2024-05-12 12:38:56,952 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-05-12 12:38:56,958 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;@1e20278c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-05-12 12:38:56,959 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2024-05-12 12:38:56,962 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-05-12 12:38:56,963 INFO L124 PetriNetUnfolderBase]: 0/7 cut-off events. [2024-05-12 12:38:56,963 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-05-12 12:38:56,963 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:38:56,964 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-05-12 12:38:56,964 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:38:56,969 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:38:56,969 INFO L85 PathProgramCache]: Analyzing trace with hash -1758069558, now seen corresponding path program 1 times [2024-05-12 12:38:56,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:38:56,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322698274] [2024-05-12 12:38:56,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:38:56,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:38:57,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:38:57,432 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:38:57,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:38:57,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322698274] [2024-05-12 12:38:57,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322698274] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:38:57,434 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:38:57,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-05-12 12:38:57,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302872256] [2024-05-12 12:38:57,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:38:57,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-05-12 12:38:57,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:38:57,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-05-12 12:38:57,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-05-12 12:38:57,497 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-05-12 12:38:57,499 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 40 transitions, 89 flow. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:38:57,499 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:38:57,499 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-05-12 12:38:57,501 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:38:57,748 INFO L124 PetriNetUnfolderBase]: 946/1501 cut-off events. [2024-05-12 12:38:57,749 INFO L125 PetriNetUnfolderBase]: For 28/28 co-relation queries the response was YES. [2024-05-12 12:38:57,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3009 conditions, 1501 events. 946/1501 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 8080 event pairs, 544 based on Foata normal form. 1/1445 useless extension candidates. Maximal degree in co-relation 2994. Up to 1429 conditions per place. [2024-05-12 12:38:57,762 INFO L140 encePairwiseOnDemand]: 39/46 looper letters, 34 selfloop transitions, 4 changer transitions 0/52 dead transitions. [2024-05-12 12:38:57,763 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 52 transitions, 195 flow [2024-05-12 12:38:57,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-05-12 12:38:57,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-05-12 12:38:57,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 95 transitions. [2024-05-12 12:38:57,771 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6884057971014492 [2024-05-12 12:38:57,772 INFO L175 Difference]: Start difference. First operand has 50 places, 40 transitions, 89 flow. Second operand 3 states and 95 transitions. [2024-05-12 12:38:57,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 52 transitions, 195 flow [2024-05-12 12:38:57,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 52 transitions, 190 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-05-12 12:38:57,782 INFO L231 Difference]: Finished difference. Result has 50 places, 43 transitions, 116 flow [2024-05-12 12:38:57,783 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=116, PETRI_PLACES=50, PETRI_TRANSITIONS=43} [2024-05-12 12:38:57,786 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 0 predicate places. [2024-05-12 12:38:57,786 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 43 transitions, 116 flow [2024-05-12 12:38:57,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:38:57,787 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:38:57,787 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:38:57,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-05-12 12:38:57,788 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:38:57,789 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:38:57,789 INFO L85 PathProgramCache]: Analyzing trace with hash -1582675031, now seen corresponding path program 1 times [2024-05-12 12:38:57,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:38:57,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954168685] [2024-05-12 12:38:57,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:38:57,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:38:57,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:38:57,951 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:38:57,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:38:57,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954168685] [2024-05-12 12:38:57,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954168685] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:38:57,952 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:38:57,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-05-12 12:38:57,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863299281] [2024-05-12 12:38:57,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:38:57,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-05-12 12:38:57,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:38:57,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-05-12 12:38:57,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-05-12 12:38:57,976 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 12:38:57,977 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 43 transitions, 116 flow. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:38:57,977 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:38:57,978 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 12:38:57,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:38:58,188 INFO L124 PetriNetUnfolderBase]: 1534/2420 cut-off events. [2024-05-12 12:38:58,188 INFO L125 PetriNetUnfolderBase]: For 434/477 co-relation queries the response was YES. [2024-05-12 12:38:58,192 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5352 conditions, 2420 events. 1534/2420 cut-off events. For 434/477 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 13658 event pairs, 814 based on Foata normal form. 3/2371 useless extension candidates. Maximal degree in co-relation 5337. Up to 2243 conditions per place. [2024-05-12 12:38:58,231 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 48 selfloop transitions, 7 changer transitions 0/67 dead transitions. [2024-05-12 12:38:58,232 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 67 transitions, 290 flow [2024-05-12 12:38:58,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-05-12 12:38:58,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-05-12 12:38:58,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 119 transitions. [2024-05-12 12:38:58,236 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6467391304347826 [2024-05-12 12:38:58,239 INFO L175 Difference]: Start difference. First operand has 50 places, 43 transitions, 116 flow. Second operand 4 states and 119 transitions. [2024-05-12 12:38:58,239 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 67 transitions, 290 flow [2024-05-12 12:38:58,241 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 67 transitions, 284 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-05-12 12:38:58,244 INFO L231 Difference]: Finished difference. Result has 54 places, 49 transitions, 168 flow [2024-05-12 12:38:58,249 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=168, PETRI_PLACES=54, PETRI_TRANSITIONS=49} [2024-05-12 12:38:58,250 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 4 predicate places. [2024-05-12 12:38:58,250 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 49 transitions, 168 flow [2024-05-12 12:38:58,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:38:58,250 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:38:58,250 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:38:58,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-05-12 12:38:58,251 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:38:58,252 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:38:58,252 INFO L85 PathProgramCache]: Analyzing trace with hash -1818284929, now seen corresponding path program 1 times [2024-05-12 12:38:58,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:38:58,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358519244] [2024-05-12 12:38:58,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:38:58,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:38:58,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:38:58,428 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:38:58,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:38:58,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358519244] [2024-05-12 12:38:58,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358519244] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:38:58,429 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:38:58,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-05-12 12:38:58,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295325986] [2024-05-12 12:38:58,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:38:58,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-05-12 12:38:58,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:38:58,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-05-12 12:38:58,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-05-12 12:38:58,451 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 12:38:58,452 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 49 transitions, 168 flow. Second operand has 5 states, 5 states have (on average 17.6) internal successors, (88), 5 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:38:58,452 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:38:58,452 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 12:38:58,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:38:58,679 INFO L124 PetriNetUnfolderBase]: 1590/2552 cut-off events. [2024-05-12 12:38:58,679 INFO L125 PetriNetUnfolderBase]: For 1147/1147 co-relation queries the response was YES. [2024-05-12 12:38:58,683 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6168 conditions, 2552 events. 1590/2552 cut-off events. For 1147/1147 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 14427 event pairs, 448 based on Foata normal form. 7/2546 useless extension candidates. Maximal degree in co-relation 6150. Up to 2134 conditions per place. [2024-05-12 12:38:58,694 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 65 selfloop transitions, 19 changer transitions 0/96 dead transitions. [2024-05-12 12:38:58,694 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 96 transitions, 474 flow [2024-05-12 12:38:58,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 12:38:58,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 12:38:58,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 160 transitions. [2024-05-12 12:38:58,696 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6956521739130435 [2024-05-12 12:38:58,696 INFO L175 Difference]: Start difference. First operand has 54 places, 49 transitions, 168 flow. Second operand 5 states and 160 transitions. [2024-05-12 12:38:58,696 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 96 transitions, 474 flow [2024-05-12 12:38:58,698 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 96 transitions, 472 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-05-12 12:38:58,699 INFO L231 Difference]: Finished difference. Result has 61 places, 63 transitions, 294 flow [2024-05-12 12:38:58,699 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=294, PETRI_PLACES=61, PETRI_TRANSITIONS=63} [2024-05-12 12:38:58,700 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 11 predicate places. [2024-05-12 12:38:58,700 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 63 transitions, 294 flow [2024-05-12 12:38:58,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.6) internal successors, (88), 5 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:38:58,700 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:38:58,701 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:38:58,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-05-12 12:38:58,701 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:38:58,701 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:38:58,701 INFO L85 PathProgramCache]: Analyzing trace with hash 679898558, now seen corresponding path program 1 times [2024-05-12 12:38:58,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:38:58,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003799126] [2024-05-12 12:38:58,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:38:58,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:38:58,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:38:58,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:38:58,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:38:58,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003799126] [2024-05-12 12:38:58,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003799126] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:38:58,861 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:38:58,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 12:38:58,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501262282] [2024-05-12 12:38:58,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:38:58,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 12:38:58,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:38:58,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 12:38:58,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-05-12 12:38:58,896 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 12:38:58,897 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 63 transitions, 294 flow. Second operand has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:38:58,897 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:38:58,897 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 12:38:58,898 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:38:59,185 INFO L124 PetriNetUnfolderBase]: 1718/2772 cut-off events. [2024-05-12 12:38:59,185 INFO L125 PetriNetUnfolderBase]: For 3282/3282 co-relation queries the response was YES. [2024-05-12 12:38:59,192 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8291 conditions, 2772 events. 1718/2772 cut-off events. For 3282/3282 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 16053 event pairs, 281 based on Foata normal form. 26/2785 useless extension candidates. Maximal degree in co-relation 8268. Up to 2122 conditions per place. [2024-05-12 12:38:59,206 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 74 selfloop transitions, 22 changer transitions 0/108 dead transitions. [2024-05-12 12:38:59,206 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 108 transitions, 634 flow [2024-05-12 12:38:59,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 12:38:59,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 12:38:59,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 188 transitions. [2024-05-12 12:38:59,210 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6811594202898551 [2024-05-12 12:38:59,210 INFO L175 Difference]: Start difference. First operand has 61 places, 63 transitions, 294 flow. Second operand 6 states and 188 transitions. [2024-05-12 12:38:59,210 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 108 transitions, 634 flow [2024-05-12 12:38:59,218 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 108 transitions, 624 flow, removed 5 selfloop flow, removed 0 redundant places. [2024-05-12 12:38:59,220 INFO L231 Difference]: Finished difference. Result has 66 places, 65 transitions, 355 flow [2024-05-12 12:38:59,220 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=278, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=355, PETRI_PLACES=66, PETRI_TRANSITIONS=65} [2024-05-12 12:38:59,222 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 16 predicate places. [2024-05-12 12:38:59,222 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 65 transitions, 355 flow [2024-05-12 12:38:59,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:38:59,222 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:38:59,222 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:38:59,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-05-12 12:38:59,223 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:38:59,223 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:38:59,223 INFO L85 PathProgramCache]: Analyzing trace with hash 238577921, now seen corresponding path program 1 times [2024-05-12 12:38:59,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:38:59,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798449673] [2024-05-12 12:38:59,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:38:59,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:38:59,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:38:59,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:38:59,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:38:59,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798449673] [2024-05-12 12:38:59,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798449673] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:38:59,363 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:38:59,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-05-12 12:38:59,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554148934] [2024-05-12 12:38:59,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:38:59,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-05-12 12:38:59,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:38:59,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-05-12 12:38:59,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-05-12 12:38:59,390 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-05-12 12:38:59,390 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 65 transitions, 355 flow. Second operand has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:38:59,390 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:38:59,390 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-05-12 12:38:59,390 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:38:59,565 INFO L124 PetriNetUnfolderBase]: 1260/2259 cut-off events. [2024-05-12 12:38:59,568 INFO L125 PetriNetUnfolderBase]: For 3793/3831 co-relation queries the response was YES. [2024-05-12 12:38:59,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7080 conditions, 2259 events. 1260/2259 cut-off events. For 3793/3831 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 14077 event pairs, 479 based on Foata normal form. 6/2193 useless extension candidates. Maximal degree in co-relation 7054. Up to 1824 conditions per place. [2024-05-12 12:38:59,585 INFO L140 encePairwiseOnDemand]: 39/46 looper letters, 54 selfloop transitions, 10 changer transitions 0/84 dead transitions. [2024-05-12 12:38:59,586 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 84 transitions, 547 flow [2024-05-12 12:38:59,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-05-12 12:38:59,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-05-12 12:38:59,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 120 transitions. [2024-05-12 12:38:59,588 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6521739130434783 [2024-05-12 12:38:59,588 INFO L175 Difference]: Start difference. First operand has 66 places, 65 transitions, 355 flow. Second operand 4 states and 120 transitions. [2024-05-12 12:38:59,588 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 84 transitions, 547 flow [2024-05-12 12:38:59,593 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 84 transitions, 496 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-05-12 12:38:59,595 INFO L231 Difference]: Finished difference. Result has 66 places, 69 transitions, 370 flow [2024-05-12 12:38:59,596 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=306, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=370, PETRI_PLACES=66, PETRI_TRANSITIONS=69} [2024-05-12 12:38:59,597 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 16 predicate places. [2024-05-12 12:38:59,597 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 69 transitions, 370 flow [2024-05-12 12:38:59,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:38:59,598 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:38:59,598 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:38:59,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-05-12 12:38:59,598 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:38:59,598 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:38:59,599 INFO L85 PathProgramCache]: Analyzing trace with hash -1213420129, now seen corresponding path program 1 times [2024-05-12 12:38:59,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:38:59,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213409471] [2024-05-12 12:38:59,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:38:59,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:38:59,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:38:59,730 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:38:59,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:38:59,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213409471] [2024-05-12 12:38:59,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213409471] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:38:59,731 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:38:59,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-05-12 12:38:59,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539554010] [2024-05-12 12:38:59,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:38:59,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-05-12 12:38:59,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:38:59,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-05-12 12:38:59,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-05-12 12:38:59,754 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 12:38:59,755 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 69 transitions, 370 flow. Second operand has 5 states, 5 states have (on average 18.2) internal successors, (91), 5 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:38:59,755 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:38:59,755 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 12:38:59,756 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:38:59,977 INFO L124 PetriNetUnfolderBase]: 1720/2788 cut-off events. [2024-05-12 12:38:59,977 INFO L125 PetriNetUnfolderBase]: For 5503/5509 co-relation queries the response was YES. [2024-05-12 12:38:59,985 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9183 conditions, 2788 events. 1720/2788 cut-off events. For 5503/5509 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 16295 event pairs, 441 based on Foata normal form. 7/2784 useless extension candidates. Maximal degree in co-relation 9156. Up to 2357 conditions per place. [2024-05-12 12:38:59,999 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 64 selfloop transitions, 24 changer transitions 0/100 dead transitions. [2024-05-12 12:38:59,999 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 100 transitions, 685 flow [2024-05-12 12:39:00,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 12:39:00,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 12:39:00,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 152 transitions. [2024-05-12 12:39:00,000 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6608695652173913 [2024-05-12 12:39:00,000 INFO L175 Difference]: Start difference. First operand has 66 places, 69 transitions, 370 flow. Second operand 5 states and 152 transitions. [2024-05-12 12:39:00,001 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 100 transitions, 685 flow [2024-05-12 12:39:00,006 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 100 transitions, 652 flow, removed 9 selfloop flow, removed 2 redundant places. [2024-05-12 12:39:00,007 INFO L231 Difference]: Finished difference. Result has 70 places, 75 transitions, 452 flow [2024-05-12 12:39:00,007 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=344, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=452, PETRI_PLACES=70, PETRI_TRANSITIONS=75} [2024-05-12 12:39:00,008 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 20 predicate places. [2024-05-12 12:39:00,008 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 75 transitions, 452 flow [2024-05-12 12:39:00,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 5 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:39:00,008 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:39:00,009 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:39:00,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-05-12 12:39:00,009 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:39:00,009 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:39:00,009 INFO L85 PathProgramCache]: Analyzing trace with hash -1793251842, now seen corresponding path program 1 times [2024-05-12 12:39:00,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:39:00,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482500738] [2024-05-12 12:39:00,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:39:00,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:39:00,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:39:00,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:39:00,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:39:00,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482500738] [2024-05-12 12:39:00,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482500738] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:39:00,167 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:39:00,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-05-12 12:39:00,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786717099] [2024-05-12 12:39:00,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:39:00,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-05-12 12:39:00,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:39:00,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-05-12 12:39:00,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-05-12 12:39:00,186 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 12:39:00,186 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 75 transitions, 452 flow. Second operand has 5 states, 5 states have (on average 18.2) internal successors, (91), 5 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:39:00,187 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:39:00,187 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 12:39:00,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:39:00,489 INFO L124 PetriNetUnfolderBase]: 1729/2938 cut-off events. [2024-05-12 12:39:00,489 INFO L125 PetriNetUnfolderBase]: For 6754/6756 co-relation queries the response was YES. [2024-05-12 12:39:00,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9907 conditions, 2938 events. 1729/2938 cut-off events. For 6754/6756 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 17545 event pairs, 535 based on Foata normal form. 4/2930 useless extension candidates. Maximal degree in co-relation 9878. Up to 2353 conditions per place. [2024-05-12 12:39:00,516 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 68 selfloop transitions, 26 changer transitions 0/106 dead transitions. [2024-05-12 12:39:00,516 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 106 transitions, 785 flow [2024-05-12 12:39:00,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 12:39:00,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 12:39:00,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 154 transitions. [2024-05-12 12:39:00,518 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6695652173913044 [2024-05-12 12:39:00,518 INFO L175 Difference]: Start difference. First operand has 70 places, 75 transitions, 452 flow. Second operand 5 states and 154 transitions. [2024-05-12 12:39:00,518 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 106 transitions, 785 flow [2024-05-12 12:39:00,526 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 106 transitions, 752 flow, removed 8 selfloop flow, removed 1 redundant places. [2024-05-12 12:39:00,527 INFO L231 Difference]: Finished difference. Result has 74 places, 78 transitions, 514 flow [2024-05-12 12:39:00,528 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=422, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=514, PETRI_PLACES=74, PETRI_TRANSITIONS=78} [2024-05-12 12:39:00,529 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 24 predicate places. [2024-05-12 12:39:00,529 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 78 transitions, 514 flow [2024-05-12 12:39:00,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 5 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:39:00,529 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:39:00,529 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:39:00,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-05-12 12:39:00,530 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:39:00,530 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:39:00,530 INFO L85 PathProgramCache]: Analyzing trace with hash 1640155552, now seen corresponding path program 2 times [2024-05-12 12:39:00,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:39:00,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667389435] [2024-05-12 12:39:00,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:39:00,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:39:00,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:39:00,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:39:00,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:39:00,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667389435] [2024-05-12 12:39:00,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667389435] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:39:00,654 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:39:00,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-05-12 12:39:00,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432053120] [2024-05-12 12:39:00,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:39:00,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-05-12 12:39:00,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:39:00,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-05-12 12:39:00,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-05-12 12:39:00,684 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 12:39:00,684 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 78 transitions, 514 flow. Second operand has 5 states, 5 states have (on average 18.2) internal successors, (91), 5 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:39:00,685 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:39:00,685 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 12:39:00,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:39:00,929 INFO L124 PetriNetUnfolderBase]: 1694/2842 cut-off events. [2024-05-12 12:39:00,929 INFO L125 PetriNetUnfolderBase]: For 8100/8106 co-relation queries the response was YES. [2024-05-12 12:39:00,936 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9780 conditions, 2842 events. 1694/2842 cut-off events. For 8100/8106 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 17148 event pairs, 689 based on Foata normal form. 5/2812 useless extension candidates. Maximal degree in co-relation 9749. Up to 2302 conditions per place. [2024-05-12 12:39:00,948 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 63 selfloop transitions, 26 changer transitions 0/101 dead transitions. [2024-05-12 12:39:00,948 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 101 transitions, 774 flow [2024-05-12 12:39:00,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 12:39:00,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 12:39:00,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 149 transitions. [2024-05-12 12:39:00,949 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6478260869565218 [2024-05-12 12:39:00,949 INFO L175 Difference]: Start difference. First operand has 74 places, 78 transitions, 514 flow. Second operand 5 states and 149 transitions. [2024-05-12 12:39:00,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 101 transitions, 774 flow [2024-05-12 12:39:00,956 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 101 transitions, 738 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-05-12 12:39:00,957 INFO L231 Difference]: Finished difference. Result has 77 places, 78 transitions, 540 flow [2024-05-12 12:39:00,958 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=478, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=540, PETRI_PLACES=77, PETRI_TRANSITIONS=78} [2024-05-12 12:39:00,958 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 27 predicate places. [2024-05-12 12:39:00,958 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 78 transitions, 540 flow [2024-05-12 12:39:00,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 5 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:39:00,959 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:39:00,959 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:39:00,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-05-12 12:39:00,959 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:39:00,960 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:39:00,960 INFO L85 PathProgramCache]: Analyzing trace with hash 2134409630, now seen corresponding path program 1 times [2024-05-12 12:39:00,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:39:00,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846976195] [2024-05-12 12:39:00,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:39:00,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:39:00,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:39:01,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:39:01,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:39:01,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846976195] [2024-05-12 12:39:01,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846976195] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:39:01,082 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:39:01,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 12:39:01,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327805312] [2024-05-12 12:39:01,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:39:01,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 12:39:01,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:39:01,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 12:39:01,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-05-12 12:39:01,106 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 12:39:01,106 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 78 transitions, 540 flow. Second operand has 6 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:39:01,107 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:39:01,107 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 12:39:01,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:39:01,390 INFO L124 PetriNetUnfolderBase]: 1807/2920 cut-off events. [2024-05-12 12:39:01,390 INFO L125 PetriNetUnfolderBase]: For 9891/9897 co-relation queries the response was YES. [2024-05-12 12:39:01,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10343 conditions, 2920 events. 1807/2920 cut-off events. For 9891/9897 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 17062 event pairs, 528 based on Foata normal form. 25/2928 useless extension candidates. Maximal degree in co-relation 10311. Up to 2297 conditions per place. [2024-05-12 12:39:01,410 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 72 selfloop transitions, 30 changer transitions 0/114 dead transitions. [2024-05-12 12:39:01,411 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 114 transitions, 878 flow [2024-05-12 12:39:01,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 12:39:01,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 12:39:01,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 179 transitions. [2024-05-12 12:39:01,412 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6485507246376812 [2024-05-12 12:39:01,412 INFO L175 Difference]: Start difference. First operand has 77 places, 78 transitions, 540 flow. Second operand 6 states and 179 transitions. [2024-05-12 12:39:01,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 114 transitions, 878 flow [2024-05-12 12:39:01,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 114 transitions, 816 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-05-12 12:39:01,423 INFO L231 Difference]: Finished difference. Result has 79 places, 81 transitions, 575 flow [2024-05-12 12:39:01,424 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=478, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=575, PETRI_PLACES=79, PETRI_TRANSITIONS=81} [2024-05-12 12:39:01,424 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 29 predicate places. [2024-05-12 12:39:01,424 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 81 transitions, 575 flow [2024-05-12 12:39:01,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:39:01,425 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:39:01,425 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:39:01,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-05-12 12:39:01,425 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:39:01,425 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:39:01,425 INFO L85 PathProgramCache]: Analyzing trace with hash -431121768, now seen corresponding path program 1 times [2024-05-12 12:39:01,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:39:01,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395841775] [2024-05-12 12:39:01,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:39:01,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:39:01,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:39:01,535 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:39:01,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:39:01,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395841775] [2024-05-12 12:39:01,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395841775] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:39:01,536 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:39:01,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-05-12 12:39:01,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666044084] [2024-05-12 12:39:01,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:39:01,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-05-12 12:39:01,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:39:01,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-05-12 12:39:01,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-05-12 12:39:01,561 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 12:39:01,561 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 81 transitions, 575 flow. Second operand has 5 states, 5 states have (on average 18.6) internal successors, (93), 5 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:39:01,561 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:39:01,561 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 12:39:01,561 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:39:01,823 INFO L124 PetriNetUnfolderBase]: 1824/2949 cut-off events. [2024-05-12 12:39:01,824 INFO L125 PetriNetUnfolderBase]: For 11025/11035 co-relation queries the response was YES. [2024-05-12 12:39:01,830 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10969 conditions, 2949 events. 1824/2949 cut-off events. For 11025/11035 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 17365 event pairs, 496 based on Foata normal form. 8/2943 useless extension candidates. Maximal degree in co-relation 10936. Up to 2499 conditions per place. [2024-05-12 12:39:01,841 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 72 selfloop transitions, 26 changer transitions 0/110 dead transitions. [2024-05-12 12:39:01,841 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 110 transitions, 895 flow [2024-05-12 12:39:01,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 12:39:01,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 12:39:01,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 150 transitions. [2024-05-12 12:39:01,842 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6521739130434783 [2024-05-12 12:39:01,843 INFO L175 Difference]: Start difference. First operand has 79 places, 81 transitions, 575 flow. Second operand 5 states and 150 transitions. [2024-05-12 12:39:01,843 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 110 transitions, 895 flow [2024-05-12 12:39:01,854 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 110 transitions, 820 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-05-12 12:39:01,855 INFO L231 Difference]: Finished difference. Result has 80 places, 84 transitions, 586 flow [2024-05-12 12:39:01,856 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=506, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=586, PETRI_PLACES=80, PETRI_TRANSITIONS=84} [2024-05-12 12:39:01,857 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 30 predicate places. [2024-05-12 12:39:01,857 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 84 transitions, 586 flow [2024-05-12 12:39:01,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.6) internal successors, (93), 5 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:39:01,858 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:39:01,858 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:39:01,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-05-12 12:39:01,858 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:39:01,858 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:39:01,859 INFO L85 PathProgramCache]: Analyzing trace with hash -431606298, now seen corresponding path program 2 times [2024-05-12 12:39:01,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:39:01,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038668532] [2024-05-12 12:39:01,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:39:01,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:39:01,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:39:01,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:39:01,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:39:01,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038668532] [2024-05-12 12:39:01,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038668532] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:39:01,970 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:39:01,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-05-12 12:39:01,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205407688] [2024-05-12 12:39:01,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:39:01,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-05-12 12:39:01,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:39:01,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-05-12 12:39:01,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-05-12 12:39:01,997 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 12:39:01,997 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 84 transitions, 586 flow. Second operand has 5 states, 5 states have (on average 18.6) internal successors, (93), 5 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:39:01,997 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:39:01,997 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 12:39:01,997 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:39:02,287 INFO L124 PetriNetUnfolderBase]: 1819/3077 cut-off events. [2024-05-12 12:39:02,288 INFO L125 PetriNetUnfolderBase]: For 11851/11859 co-relation queries the response was YES. [2024-05-12 12:39:02,296 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10983 conditions, 3077 events. 1819/3077 cut-off events. For 11851/11859 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 18937 event pairs, 742 based on Foata normal form. 5/3046 useless extension candidates. Maximal degree in co-relation 10949. Up to 2494 conditions per place. [2024-05-12 12:39:02,310 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 67 selfloop transitions, 26 changer transitions 0/105 dead transitions. [2024-05-12 12:39:02,311 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 105 transitions, 822 flow [2024-05-12 12:39:02,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 12:39:02,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 12:39:02,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 145 transitions. [2024-05-12 12:39:02,312 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6304347826086957 [2024-05-12 12:39:02,312 INFO L175 Difference]: Start difference. First operand has 80 places, 84 transitions, 586 flow. Second operand 5 states and 145 transitions. [2024-05-12 12:39:02,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 105 transitions, 822 flow [2024-05-12 12:39:02,323 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 105 transitions, 758 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-05-12 12:39:02,325 INFO L231 Difference]: Finished difference. Result has 81 places, 84 transitions, 582 flow [2024-05-12 12:39:02,325 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=522, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=582, PETRI_PLACES=81, PETRI_TRANSITIONS=84} [2024-05-12 12:39:02,326 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 31 predicate places. [2024-05-12 12:39:02,326 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 84 transitions, 582 flow [2024-05-12 12:39:02,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.6) internal successors, (93), 5 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:39:02,326 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:39:02,326 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:39:02,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-05-12 12:39:02,327 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:39:02,327 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:39:02,327 INFO L85 PathProgramCache]: Analyzing trace with hash 135428769, now seen corresponding path program 1 times [2024-05-12 12:39:02,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:39:02,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860163384] [2024-05-12 12:39:02,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:39:02,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:39:02,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:39:02,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:39:02,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:39:02,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860163384] [2024-05-12 12:39:02,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860163384] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:39:02,454 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:39:02,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 12:39:02,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088963379] [2024-05-12 12:39:02,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:39:02,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 12:39:02,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:39:02,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 12:39:02,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-05-12 12:39:02,482 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 12:39:02,483 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 84 transitions, 582 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) [2024-05-12 12:39:02,483 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:39:02,483 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 12:39:02,483 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:39:02,769 INFO L124 PetriNetUnfolderBase]: 1968/3178 cut-off events. [2024-05-12 12:39:02,769 INFO L125 PetriNetUnfolderBase]: For 13849/13851 co-relation queries the response was YES. [2024-05-12 12:39:02,777 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11916 conditions, 3178 events. 1968/3178 cut-off events. For 13849/13851 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 18885 event pairs, 350 based on Foata normal form. 4/3166 useless extension candidates. Maximal degree in co-relation 11883. Up to 2307 conditions per place. [2024-05-12 12:39:02,790 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 81 selfloop transitions, 33 changer transitions 0/126 dead transitions. [2024-05-12 12:39:02,790 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 126 transitions, 990 flow [2024-05-12 12:39:02,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 12:39:02,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 12:39:02,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 181 transitions. [2024-05-12 12:39:02,791 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6557971014492754 [2024-05-12 12:39:02,791 INFO L175 Difference]: Start difference. First operand has 81 places, 84 transitions, 582 flow. Second operand 6 states and 181 transitions. [2024-05-12 12:39:02,791 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 126 transitions, 990 flow [2024-05-12 12:39:02,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 126 transitions, 930 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-05-12 12:39:02,808 INFO L231 Difference]: Finished difference. Result has 83 places, 88 transitions, 635 flow [2024-05-12 12:39:02,809 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=522, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=635, PETRI_PLACES=83, PETRI_TRANSITIONS=88} [2024-05-12 12:39:02,810 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 33 predicate places. [2024-05-12 12:39:02,810 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 88 transitions, 635 flow [2024-05-12 12:39:02,810 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) [2024-05-12 12:39:02,810 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:39:02,810 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:39:02,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-05-12 12:39:02,811 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:39:02,811 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:39:02,811 INFO L85 PathProgramCache]: Analyzing trace with hash -774755545, now seen corresponding path program 2 times [2024-05-12 12:39:02,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:39:02,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953303253] [2024-05-12 12:39:02,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:39:02,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:39:02,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:39:02,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:39:02,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:39:02,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953303253] [2024-05-12 12:39:02,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953303253] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:39:02,933 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:39:02,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 12:39:02,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872044502] [2024-05-12 12:39:02,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:39:02,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 12:39:02,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:39:02,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 12:39:02,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-05-12 12:39:02,955 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 12:39:02,956 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 88 transitions, 635 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) [2024-05-12 12:39:02,956 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:39:02,956 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 12:39:02,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:39:03,259 INFO L124 PetriNetUnfolderBase]: 1960/3253 cut-off events. [2024-05-12 12:39:03,259 INFO L125 PetriNetUnfolderBase]: For 16029/16031 co-relation queries the response was YES. [2024-05-12 12:39:03,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12340 conditions, 3253 events. 1960/3253 cut-off events. For 16029/16031 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 19797 event pairs, 556 based on Foata normal form. 4/3243 useless extension candidates. Maximal degree in co-relation 12306. Up to 2691 conditions per place. [2024-05-12 12:39:03,282 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 77 selfloop transitions, 31 changer transitions 0/120 dead transitions. [2024-05-12 12:39:03,282 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 120 transitions, 935 flow [2024-05-12 12:39:03,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 12:39:03,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 12:39:03,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 175 transitions. [2024-05-12 12:39:03,283 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6340579710144928 [2024-05-12 12:39:03,283 INFO L175 Difference]: Start difference. First operand has 83 places, 88 transitions, 635 flow. Second operand 6 states and 175 transitions. [2024-05-12 12:39:03,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 120 transitions, 935 flow [2024-05-12 12:39:03,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 120 transitions, 889 flow, removed 7 selfloop flow, removed 2 redundant places. [2024-05-12 12:39:03,305 INFO L231 Difference]: Finished difference. Result has 87 places, 89 transitions, 670 flow [2024-05-12 12:39:03,305 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=589, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=670, PETRI_PLACES=87, PETRI_TRANSITIONS=89} [2024-05-12 12:39:03,306 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 37 predicate places. [2024-05-12 12:39:03,306 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 89 transitions, 670 flow [2024-05-12 12:39:03,306 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) [2024-05-12 12:39:03,306 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:39:03,306 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:39:03,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-05-12 12:39:03,307 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:39:03,307 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:39:03,307 INFO L85 PathProgramCache]: Analyzing trace with hash -1180780192, now seen corresponding path program 1 times [2024-05-12 12:39:03,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:39:03,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806431584] [2024-05-12 12:39:03,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:39:03,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:39:03,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:39:03,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:39:03,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:39:03,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806431584] [2024-05-12 12:39:03,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806431584] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:39:03,454 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:39:03,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-05-12 12:39:03,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567981153] [2024-05-12 12:39:03,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:39:03,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-05-12 12:39:03,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:39:03,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-05-12 12:39:03,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-05-12 12:39:03,485 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 12:39:03,486 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 89 transitions, 670 flow. Second operand has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:39:03,486 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:39:03,486 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 12:39:03,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:39:03,759 INFO L124 PetriNetUnfolderBase]: 1971/3282 cut-off events. [2024-05-12 12:39:03,759 INFO L125 PetriNetUnfolderBase]: For 17502/17502 co-relation queries the response was YES. [2024-05-12 12:39:03,770 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12736 conditions, 3282 events. 1971/3282 cut-off events. For 17502/17502 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 20174 event pairs, 752 based on Foata normal form. 1/3257 useless extension candidates. Maximal degree in co-relation 12700. Up to 2899 conditions per place. [2024-05-12 12:39:03,784 INFO L140 encePairwiseOnDemand]: 39/46 looper letters, 93 selfloop transitions, 15 changer transitions 0/120 dead transitions. [2024-05-12 12:39:03,785 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 120 transitions, 1024 flow [2024-05-12 12:39:03,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 12:39:03,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 12:39:03,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 141 transitions. [2024-05-12 12:39:03,786 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6130434782608696 [2024-05-12 12:39:03,786 INFO L175 Difference]: Start difference. First operand has 87 places, 89 transitions, 670 flow. Second operand 5 states and 141 transitions. [2024-05-12 12:39:03,786 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 120 transitions, 1024 flow [2024-05-12 12:39:03,805 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 120 transitions, 951 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-05-12 12:39:03,807 INFO L231 Difference]: Finished difference. Result has 89 places, 98 transitions, 709 flow [2024-05-12 12:39:03,807 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=597, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=709, PETRI_PLACES=89, PETRI_TRANSITIONS=98} [2024-05-12 12:39:03,808 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 39 predicate places. [2024-05-12 12:39:03,808 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 98 transitions, 709 flow [2024-05-12 12:39:03,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:39:03,808 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:39:03,808 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:39:03,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-05-12 12:39:03,809 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:39:03,809 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:39:03,809 INFO L85 PathProgramCache]: Analyzing trace with hash -1835243779, now seen corresponding path program 1 times [2024-05-12 12:39:03,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:39:03,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952372184] [2024-05-12 12:39:03,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:39:03,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:39:03,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:39:03,939 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:39:03,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:39:03,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952372184] [2024-05-12 12:39:03,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952372184] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:39:03,939 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:39:03,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 12:39:03,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790814682] [2024-05-12 12:39:03,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:39:03,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 12:39:03,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:39:03,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 12:39:03,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-05-12 12:39:03,979 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 12:39:03,979 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 98 transitions, 709 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) [2024-05-12 12:39:03,979 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:39:03,979 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 12:39:03,979 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:39:04,344 INFO L124 PetriNetUnfolderBase]: 1963/3283 cut-off events. [2024-05-12 12:39:04,345 INFO L125 PetriNetUnfolderBase]: For 19446/19455 co-relation queries the response was YES. [2024-05-12 12:39:04,355 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12884 conditions, 3283 events. 1963/3283 cut-off events. For 19446/19455 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 20170 event pairs, 726 based on Foata normal form. 6/3251 useless extension candidates. Maximal degree in co-relation 12846. Up to 2694 conditions per place. [2024-05-12 12:39:04,370 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 85 selfloop transitions, 31 changer transitions 0/128 dead transitions. [2024-05-12 12:39:04,370 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 128 transitions, 1031 flow [2024-05-12 12:39:04,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 12:39:04,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 12:39:04,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 172 transitions. [2024-05-12 12:39:04,371 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6231884057971014 [2024-05-12 12:39:04,372 INFO L175 Difference]: Start difference. First operand has 89 places, 98 transitions, 709 flow. Second operand 6 states and 172 transitions. [2024-05-12 12:39:04,372 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 128 transitions, 1031 flow [2024-05-12 12:39:04,394 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 128 transitions, 1011 flow, removed 10 selfloop flow, removed 0 redundant places. [2024-05-12 12:39:04,396 INFO L231 Difference]: Finished difference. Result has 95 places, 100 transitions, 786 flow [2024-05-12 12:39:04,396 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=689, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=786, PETRI_PLACES=95, PETRI_TRANSITIONS=100} [2024-05-12 12:39:04,397 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 45 predicate places. [2024-05-12 12:39:04,397 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 100 transitions, 786 flow [2024-05-12 12:39:04,397 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) [2024-05-12 12:39:04,397 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:39:04,397 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:39:04,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-05-12 12:39:04,398 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:39:04,398 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:39:04,398 INFO L85 PathProgramCache]: Analyzing trace with hash 927177671, now seen corresponding path program 2 times [2024-05-12 12:39:04,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:39:04,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055439115] [2024-05-12 12:39:04,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:39:04,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:39:04,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:39:04,524 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:39:04,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:39:04,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055439115] [2024-05-12 12:39:04,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055439115] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:39:04,524 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:39:04,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 12:39:04,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395847141] [2024-05-12 12:39:04,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:39:04,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 12:39:04,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:39:04,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 12:39:04,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-05-12 12:39:04,571 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 12:39:04,572 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 100 transitions, 786 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) [2024-05-12 12:39:04,572 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:39:04,572 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 12:39:04,572 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:39:04,915 INFO L124 PetriNetUnfolderBase]: 2042/3411 cut-off events. [2024-05-12 12:39:04,915 INFO L125 PetriNetUnfolderBase]: For 23358/23367 co-relation queries the response was YES. [2024-05-12 12:39:04,926 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13884 conditions, 3411 events. 2042/3411 cut-off events. For 23358/23367 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 21129 event pairs, 623 based on Foata normal form. 6/3383 useless extension candidates. Maximal degree in co-relation 13843. Up to 2455 conditions per place. [2024-05-12 12:39:04,941 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 90 selfloop transitions, 35 changer transitions 0/137 dead transitions. [2024-05-12 12:39:04,941 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 137 transitions, 1210 flow [2024-05-12 12:39:04,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 12:39:04,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 12:39:04,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 178 transitions. [2024-05-12 12:39:04,942 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.644927536231884 [2024-05-12 12:39:04,942 INFO L175 Difference]: Start difference. First operand has 95 places, 100 transitions, 786 flow. Second operand 6 states and 178 transitions. [2024-05-12 12:39:04,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 137 transitions, 1210 flow [2024-05-12 12:39:04,966 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 137 transitions, 1133 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-05-12 12:39:04,968 INFO L231 Difference]: Finished difference. Result has 97 places, 103 transitions, 824 flow [2024-05-12 12:39:04,968 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=709, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=824, PETRI_PLACES=97, PETRI_TRANSITIONS=103} [2024-05-12 12:39:04,969 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 47 predicate places. [2024-05-12 12:39:04,969 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 103 transitions, 824 flow [2024-05-12 12:39:04,969 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) [2024-05-12 12:39:04,969 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:39:04,969 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:39:04,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-05-12 12:39:04,970 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:39:04,970 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:39:04,970 INFO L85 PathProgramCache]: Analyzing trace with hash -1404622888, now seen corresponding path program 2 times [2024-05-12 12:39:04,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:39:04,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276032133] [2024-05-12 12:39:04,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:39:04,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:39:04,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:39:05,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:39:05,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:39:05,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276032133] [2024-05-12 12:39:05,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276032133] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:39:05,109 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:39:05,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-05-12 12:39:05,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470353407] [2024-05-12 12:39:05,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:39:05,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-05-12 12:39:05,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:39:05,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-05-12 12:39:05,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-05-12 12:39:05,143 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 12:39:05,144 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 103 transitions, 824 flow. Second operand has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:39:05,144 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:39:05,144 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 12:39:05,144 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:39:05,430 INFO L124 PetriNetUnfolderBase]: 2050/3428 cut-off events. [2024-05-12 12:39:05,430 INFO L125 PetriNetUnfolderBase]: For 25733/25733 co-relation queries the response was YES. [2024-05-12 12:39:05,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14255 conditions, 3428 events. 2050/3428 cut-off events. For 25733/25733 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 21296 event pairs, 794 based on Foata normal form. 2/3400 useless extension candidates. Maximal degree in co-relation 14213. Up to 3021 conditions per place. [2024-05-12 12:39:05,456 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 95 selfloop transitions, 17 changer transitions 0/124 dead transitions. [2024-05-12 12:39:05,456 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 124 transitions, 1126 flow [2024-05-12 12:39:05,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-05-12 12:39:05,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-05-12 12:39:05,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 120 transitions. [2024-05-12 12:39:05,457 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6521739130434783 [2024-05-12 12:39:05,457 INFO L175 Difference]: Start difference. First operand has 97 places, 103 transitions, 824 flow. Second operand 4 states and 120 transitions. [2024-05-12 12:39:05,457 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 124 transitions, 1126 flow [2024-05-12 12:39:05,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 124 transitions, 1064 flow, removed 15 selfloop flow, removed 2 redundant places. [2024-05-12 12:39:05,491 INFO L231 Difference]: Finished difference. Result has 99 places, 106 transitions, 850 flow [2024-05-12 12:39:05,492 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=762, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=850, PETRI_PLACES=99, PETRI_TRANSITIONS=106} [2024-05-12 12:39:05,492 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 49 predicate places. [2024-05-12 12:39:05,492 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 106 transitions, 850 flow [2024-05-12 12:39:05,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:39:05,492 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:39:05,492 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:39:05,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-05-12 12:39:05,493 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:39:05,493 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:39:05,493 INFO L85 PathProgramCache]: Analyzing trace with hash -1611605061, now seen corresponding path program 1 times [2024-05-12 12:39:05,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:39:05,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756647228] [2024-05-12 12:39:05,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:39:05,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:39:05,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:39:05,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:39:05,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:39:05,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756647228] [2024-05-12 12:39:05,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756647228] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:39:05,593 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:39:05,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 12:39:05,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579444535] [2024-05-12 12:39:05,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:39:05,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 12:39:05,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:39:05,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 12:39:05,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-05-12 12:39:05,622 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 12:39:05,622 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 106 transitions, 850 flow. Second operand has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:39:05,622 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:39:05,622 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 12:39:05,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:39:05,940 INFO L124 PetriNetUnfolderBase]: 2117/3435 cut-off events. [2024-05-12 12:39:05,941 INFO L125 PetriNetUnfolderBase]: For 29887/29901 co-relation queries the response was YES. [2024-05-12 12:39:05,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14871 conditions, 3435 events. 2117/3435 cut-off events. For 29887/29901 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 20816 event pairs, 366 based on Foata normal form. 15/3433 useless extension candidates. Maximal degree in co-relation 14827. Up to 1898 conditions per place. [2024-05-12 12:39:05,966 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 96 selfloop transitions, 32 changer transitions 0/140 dead transitions. [2024-05-12 12:39:05,966 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 140 transitions, 1232 flow [2024-05-12 12:39:05,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 12:39:05,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 12:39:05,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 172 transitions. [2024-05-12 12:39:05,967 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6231884057971014 [2024-05-12 12:39:05,967 INFO L175 Difference]: Start difference. First operand has 99 places, 106 transitions, 850 flow. Second operand 6 states and 172 transitions. [2024-05-12 12:39:05,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 140 transitions, 1232 flow [2024-05-12 12:39:05,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 140 transitions, 1192 flow, removed 9 selfloop flow, removed 2 redundant places. [2024-05-12 12:39:05,999 INFO L231 Difference]: Finished difference. Result has 103 places, 107 transitions, 892 flow [2024-05-12 12:39:05,999 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=810, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=892, PETRI_PLACES=103, PETRI_TRANSITIONS=107} [2024-05-12 12:39:06,000 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 53 predicate places. [2024-05-12 12:39:06,000 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 107 transitions, 892 flow [2024-05-12 12:39:06,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:39:06,000 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:39:06,000 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:39:06,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-05-12 12:39:06,000 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:39:06,001 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:39:06,001 INFO L85 PathProgramCache]: Analyzing trace with hash -1726451901, now seen corresponding path program 2 times [2024-05-12 12:39:06,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:39:06,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814154332] [2024-05-12 12:39:06,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:39:06,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:39:06,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:39:06,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:39:06,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:39:06,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814154332] [2024-05-12 12:39:06,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814154332] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:39:06,103 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:39:06,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 12:39:06,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480299904] [2024-05-12 12:39:06,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:39:06,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 12:39:06,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:39:06,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 12:39:06,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-05-12 12:39:06,128 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 12:39:06,128 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 107 transitions, 892 flow. Second operand has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:39:06,128 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:39:06,129 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 12:39:06,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:39:06,440 INFO L124 PetriNetUnfolderBase]: 2097/3418 cut-off events. [2024-05-12 12:39:06,441 INFO L125 PetriNetUnfolderBase]: For 30986/30998 co-relation queries the response was YES. [2024-05-12 12:39:06,453 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15079 conditions, 3418 events. 2097/3418 cut-off events. For 30986/30998 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 20711 event pairs, 523 based on Foata normal form. 15/3410 useless extension candidates. Maximal degree in co-relation 15034. Up to 2569 conditions per place. [2024-05-12 12:39:06,464 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 94 selfloop transitions, 35 changer transitions 0/141 dead transitions. [2024-05-12 12:39:06,465 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 141 transitions, 1234 flow [2024-05-12 12:39:06,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 12:39:06,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 12:39:06,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 177 transitions. [2024-05-12 12:39:06,466 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6413043478260869 [2024-05-12 12:39:06,466 INFO L175 Difference]: Start difference. First operand has 103 places, 107 transitions, 892 flow. Second operand 6 states and 177 transitions. [2024-05-12 12:39:06,466 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 141 transitions, 1234 flow [2024-05-12 12:39:06,500 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 141 transitions, 1181 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-05-12 12:39:06,502 INFO L231 Difference]: Finished difference. Result has 106 places, 107 transitions, 915 flow [2024-05-12 12:39:06,502 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=839, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=915, PETRI_PLACES=106, PETRI_TRANSITIONS=107} [2024-05-12 12:39:06,502 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 56 predicate places. [2024-05-12 12:39:06,503 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 107 transitions, 915 flow [2024-05-12 12:39:06,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:39:06,503 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:39:06,503 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:39:06,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-05-12 12:39:06,503 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:39:06,504 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:39:06,504 INFO L85 PathProgramCache]: Analyzing trace with hash 581887474, now seen corresponding path program 1 times [2024-05-12 12:39:06,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:39:06,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963741904] [2024-05-12 12:39:06,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:39:06,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:39:06,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:39:06,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:39:06,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:39:06,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963741904] [2024-05-12 12:39:06,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963741904] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:39:06,620 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:39:06,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 12:39:06,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120260449] [2024-05-12 12:39:06,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:39:06,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 12:39:06,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:39:06,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 12:39:06,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-05-12 12:39:06,647 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 12:39:06,647 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 107 transitions, 915 flow. Second operand has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:39:06,648 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:39:06,648 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 12:39:06,648 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:39:06,948 INFO L124 PetriNetUnfolderBase]: 2172/3562 cut-off events. [2024-05-12 12:39:06,949 INFO L125 PetriNetUnfolderBase]: For 32986/32988 co-relation queries the response was YES. [2024-05-12 12:39:06,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15624 conditions, 3562 events. 2172/3562 cut-off events. For 32986/32988 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 22011 event pairs, 518 based on Foata normal form. 3/3553 useless extension candidates. Maximal degree in co-relation 15578. Up to 2842 conditions per place. [2024-05-12 12:39:06,973 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 102 selfloop transitions, 48 changer transitions 0/162 dead transitions. [2024-05-12 12:39:06,973 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 162 transitions, 1577 flow [2024-05-12 12:39:06,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 12:39:06,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 12:39:06,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 183 transitions. [2024-05-12 12:39:06,975 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6630434782608695 [2024-05-12 12:39:06,975 INFO L175 Difference]: Start difference. First operand has 106 places, 107 transitions, 915 flow. Second operand 6 states and 183 transitions. [2024-05-12 12:39:06,975 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 162 transitions, 1577 flow [2024-05-12 12:39:07,015 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 162 transitions, 1494 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-05-12 12:39:07,017 INFO L231 Difference]: Finished difference. Result has 109 places, 127 transitions, 1146 flow [2024-05-12 12:39:07,018 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=832, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1146, PETRI_PLACES=109, PETRI_TRANSITIONS=127} [2024-05-12 12:39:07,018 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 59 predicate places. [2024-05-12 12:39:07,018 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 127 transitions, 1146 flow [2024-05-12 12:39:07,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:39:07,018 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:39:07,019 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:39:07,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-05-12 12:39:07,019 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:39:07,019 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:39:07,019 INFO L85 PathProgramCache]: Analyzing trace with hash 1118134167, now seen corresponding path program 3 times [2024-05-12 12:39:07,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:39:07,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530841542] [2024-05-12 12:39:07,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:39:07,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:39:07,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:39:07,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:39:07,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:39:07,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530841542] [2024-05-12 12:39:07,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530841542] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:39:07,123 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:39:07,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 12:39:07,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299973461] [2024-05-12 12:39:07,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:39:07,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 12:39:07,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:39:07,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 12:39:07,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-05-12 12:39:07,159 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 12:39:07,159 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 127 transitions, 1146 flow. Second operand has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:39:07,160 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:39:07,160 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 12:39:07,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:39:07,536 INFO L124 PetriNetUnfolderBase]: 2326/3813 cut-off events. [2024-05-12 12:39:07,536 INFO L125 PetriNetUnfolderBase]: For 42260/42276 co-relation queries the response was YES. [2024-05-12 12:39:07,552 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17799 conditions, 3813 events. 2326/3813 cut-off events. For 42260/42276 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 23808 event pairs, 424 based on Foata normal form. 22/3817 useless extension candidates. Maximal degree in co-relation 17750. Up to 2812 conditions per place. [2024-05-12 12:39:07,568 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 126 selfloop transitions, 30 changer transitions 0/168 dead transitions. [2024-05-12 12:39:07,568 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 168 transitions, 1660 flow [2024-05-12 12:39:07,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 12:39:07,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 12:39:07,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 180 transitions. [2024-05-12 12:39:07,570 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6521739130434783 [2024-05-12 12:39:07,570 INFO L175 Difference]: Start difference. First operand has 109 places, 127 transitions, 1146 flow. Second operand 6 states and 180 transitions. [2024-05-12 12:39:07,570 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 168 transitions, 1660 flow [2024-05-12 12:39:07,624 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 168 transitions, 1622 flow, removed 19 selfloop flow, removed 0 redundant places. [2024-05-12 12:39:07,626 INFO L231 Difference]: Finished difference. Result has 115 places, 129 transitions, 1202 flow [2024-05-12 12:39:07,626 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1108, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1202, PETRI_PLACES=115, PETRI_TRANSITIONS=129} [2024-05-12 12:39:07,627 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 65 predicate places. [2024-05-12 12:39:07,627 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 129 transitions, 1202 flow [2024-05-12 12:39:07,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:39:07,627 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:39:07,627 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:39:07,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-05-12 12:39:07,627 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:39:07,628 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:39:07,628 INFO L85 PathProgramCache]: Analyzing trace with hash 1838218469, now seen corresponding path program 4 times [2024-05-12 12:39:07,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:39:07,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52813008] [2024-05-12 12:39:07,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:39:07,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:39:07,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:39:07,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:39:07,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:39:07,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52813008] [2024-05-12 12:39:07,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52813008] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:39:07,751 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:39:07,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 12:39:07,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649068323] [2024-05-12 12:39:07,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:39:07,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 12:39:07,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:39:07,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 12:39:07,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-05-12 12:39:07,784 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 12:39:07,784 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 129 transitions, 1202 flow. Second operand has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:39:07,784 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:39:07,784 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 12:39:07,785 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:39:08,197 INFO L124 PetriNetUnfolderBase]: 2420/3966 cut-off events. [2024-05-12 12:39:08,197 INFO L125 PetriNetUnfolderBase]: For 47733/47747 co-relation queries the response was YES. [2024-05-12 12:39:08,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18731 conditions, 3966 events. 2420/3966 cut-off events. For 47733/47747 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 24969 event pairs, 590 based on Foata normal form. 21/3971 useless extension candidates. Maximal degree in co-relation 18679. Up to 3307 conditions per place. [2024-05-12 12:39:08,225 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 122 selfloop transitions, 27 changer transitions 0/161 dead transitions. [2024-05-12 12:39:08,225 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 161 transitions, 1595 flow [2024-05-12 12:39:08,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 12:39:08,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 12:39:08,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 172 transitions. [2024-05-12 12:39:08,226 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6231884057971014 [2024-05-12 12:39:08,227 INFO L175 Difference]: Start difference. First operand has 115 places, 129 transitions, 1202 flow. Second operand 6 states and 172 transitions. [2024-05-12 12:39:08,227 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 161 transitions, 1595 flow [2024-05-12 12:39:08,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 161 transitions, 1553 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-05-12 12:39:08,279 INFO L231 Difference]: Finished difference. Result has 119 places, 130 transitions, 1238 flow [2024-05-12 12:39:08,279 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1162, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1238, PETRI_PLACES=119, PETRI_TRANSITIONS=130} [2024-05-12 12:39:08,280 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 69 predicate places. [2024-05-12 12:39:08,280 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 130 transitions, 1238 flow [2024-05-12 12:39:08,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:39:08,280 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:39:08,280 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:39:08,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-05-12 12:39:08,281 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:39:08,281 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:39:08,281 INFO L85 PathProgramCache]: Analyzing trace with hash 1832856089, now seen corresponding path program 5 times [2024-05-12 12:39:08,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:39:08,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965193649] [2024-05-12 12:39:08,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:39:08,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:39:08,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:39:08,411 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:39:08,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:39:08,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965193649] [2024-05-12 12:39:08,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965193649] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:39:08,412 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:39:08,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 12:39:08,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852040829] [2024-05-12 12:39:08,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:39:08,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 12:39:08,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:39:08,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 12:39:08,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-05-12 12:39:08,440 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 12:39:08,441 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 130 transitions, 1238 flow. Second operand has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:39:08,441 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:39:08,441 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 12:39:08,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:39:08,845 INFO L124 PetriNetUnfolderBase]: 2392/3919 cut-off events. [2024-05-12 12:39:08,845 INFO L125 PetriNetUnfolderBase]: For 46947/46963 co-relation queries the response was YES. [2024-05-12 12:39:08,861 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18489 conditions, 3919 events. 2392/3919 cut-off events. For 46947/46963 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 24634 event pairs, 571 based on Foata normal form. 26/3929 useless extension candidates. Maximal degree in co-relation 18435. Up to 3263 conditions per place. [2024-05-12 12:39:08,877 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 125 selfloop transitions, 27 changer transitions 0/164 dead transitions. [2024-05-12 12:39:08,877 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 164 transitions, 1630 flow [2024-05-12 12:39:08,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 12:39:08,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 12:39:08,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 175 transitions. [2024-05-12 12:39:08,878 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6340579710144928 [2024-05-12 12:39:08,878 INFO L175 Difference]: Start difference. First operand has 119 places, 130 transitions, 1238 flow. Second operand 6 states and 175 transitions. [2024-05-12 12:39:08,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 164 transitions, 1630 flow [2024-05-12 12:39:08,938 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 164 transitions, 1571 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-05-12 12:39:08,941 INFO L231 Difference]: Finished difference. Result has 121 places, 130 transitions, 1240 flow [2024-05-12 12:39:08,942 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1179, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1240, PETRI_PLACES=121, PETRI_TRANSITIONS=130} [2024-05-12 12:39:08,943 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 71 predicate places. [2024-05-12 12:39:08,943 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 130 transitions, 1240 flow [2024-05-12 12:39:08,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:39:08,943 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:39:08,943 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:39:08,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-05-12 12:39:08,943 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:39:08,944 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:39:08,944 INFO L85 PathProgramCache]: Analyzing trace with hash 1838433671, now seen corresponding path program 1 times [2024-05-12 12:39:08,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:39:08,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709451678] [2024-05-12 12:39:08,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:39:08,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:39:08,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:39:09,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:39:09,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:39:09,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709451678] [2024-05-12 12:39:09,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709451678] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:39:09,069 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:39:09,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 12:39:09,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383138587] [2024-05-12 12:39:09,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:39:09,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 12:39:09,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:39:09,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 12:39:09,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-05-12 12:39:09,122 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 12:39:09,122 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 130 transitions, 1240 flow. Second operand has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:39:09,122 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:39:09,122 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 12:39:09,122 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:39:09,522 INFO L124 PetriNetUnfolderBase]: 2459/4157 cut-off events. [2024-05-12 12:39:09,522 INFO L125 PetriNetUnfolderBase]: For 49760/49774 co-relation queries the response was YES. [2024-05-12 12:39:09,537 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19064 conditions, 4157 events. 2459/4157 cut-off events. For 49760/49774 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 27225 event pairs, 744 based on Foata normal form. 17/4124 useless extension candidates. Maximal degree in co-relation 19009. Up to 2957 conditions per place. [2024-05-12 12:39:09,551 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 122 selfloop transitions, 31 changer transitions 0/165 dead transitions. [2024-05-12 12:39:09,551 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 165 transitions, 1651 flow [2024-05-12 12:39:09,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 12:39:09,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 12:39:09,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 175 transitions. [2024-05-12 12:39:09,552 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6340579710144928 [2024-05-12 12:39:09,552 INFO L175 Difference]: Start difference. First operand has 121 places, 130 transitions, 1240 flow. Second operand 6 states and 175 transitions. [2024-05-12 12:39:09,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 165 transitions, 1651 flow [2024-05-12 12:39:09,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 165 transitions, 1583 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-05-12 12:39:09,606 INFO L231 Difference]: Finished difference. Result has 122 places, 131 transitions, 1257 flow [2024-05-12 12:39:09,606 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1172, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1257, PETRI_PLACES=122, PETRI_TRANSITIONS=131} [2024-05-12 12:39:09,606 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 72 predicate places. [2024-05-12 12:39:09,606 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 131 transitions, 1257 flow [2024-05-12 12:39:09,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:39:09,607 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:39:09,607 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:39:09,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-05-12 12:39:09,607 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:39:09,607 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:39:09,607 INFO L85 PathProgramCache]: Analyzing trace with hash -1354610344, now seen corresponding path program 2 times [2024-05-12 12:39:09,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:39:09,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234128343] [2024-05-12 12:39:09,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:39:09,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:39:09,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:39:09,728 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:39:09,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:39:09,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234128343] [2024-05-12 12:39:09,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234128343] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:39:09,729 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:39:09,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 12:39:09,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406257661] [2024-05-12 12:39:09,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:39:09,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 12:39:09,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:39:09,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 12:39:09,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-05-12 12:39:09,752 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 12:39:09,752 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 131 transitions, 1257 flow. Second operand has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:39:09,752 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:39:09,752 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 12:39:09,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:39:10,139 INFO L124 PetriNetUnfolderBase]: 2538/4163 cut-off events. [2024-05-12 12:39:10,139 INFO L125 PetriNetUnfolderBase]: For 50257/50259 co-relation queries the response was YES. [2024-05-12 12:39:10,156 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19754 conditions, 4163 events. 2538/4163 cut-off events. For 50257/50259 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 26363 event pairs, 582 based on Foata normal form. 3/4152 useless extension candidates. Maximal degree in co-relation 19698. Up to 3365 conditions per place. [2024-05-12 12:39:10,172 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 105 selfloop transitions, 53 changer transitions 0/170 dead transitions. [2024-05-12 12:39:10,172 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 170 transitions, 1907 flow [2024-05-12 12:39:10,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 12:39:10,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 12:39:10,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 177 transitions. [2024-05-12 12:39:10,173 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6413043478260869 [2024-05-12 12:39:10,173 INFO L175 Difference]: Start difference. First operand has 122 places, 131 transitions, 1257 flow. Second operand 6 states and 177 transitions. [2024-05-12 12:39:10,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 170 transitions, 1907 flow [2024-05-12 12:39:10,287 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 170 transitions, 1837 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-05-12 12:39:10,289 INFO L231 Difference]: Finished difference. Result has 125 places, 141 transitions, 1424 flow [2024-05-12 12:39:10,289 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1187, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1424, PETRI_PLACES=125, PETRI_TRANSITIONS=141} [2024-05-12 12:39:10,289 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 75 predicate places. [2024-05-12 12:39:10,289 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 141 transitions, 1424 flow [2024-05-12 12:39:10,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:39:10,289 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:39:10,290 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:39:10,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-05-12 12:39:10,290 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:39:10,290 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:39:10,290 INFO L85 PathProgramCache]: Analyzing trace with hash 2050520620, now seen corresponding path program 1 times [2024-05-12 12:39:10,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:39:10,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390078420] [2024-05-12 12:39:10,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:39:10,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:39:10,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:39:10,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:39:10,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:39:10,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390078420] [2024-05-12 12:39:10,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390078420] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:39:10,399 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:39:10,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 12:39:10,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28803806] [2024-05-12 12:39:10,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:39:10,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 12:39:10,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:39:10,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 12:39:10,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-05-12 12:39:10,421 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 12:39:10,421 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 141 transitions, 1424 flow. Second operand has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:39:10,421 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:39:10,421 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 12:39:10,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:39:10,800 INFO L124 PetriNetUnfolderBase]: 2549/4194 cut-off events. [2024-05-12 12:39:10,800 INFO L125 PetriNetUnfolderBase]: For 52376/52376 co-relation queries the response was YES. [2024-05-12 12:39:10,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20107 conditions, 4194 events. 2549/4194 cut-off events. For 52376/52376 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 26635 event pairs, 688 based on Foata normal form. 1/4189 useless extension candidates. Maximal degree in co-relation 20049. Up to 3766 conditions per place. [2024-05-12 12:39:10,836 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 135 selfloop transitions, 25 changer transitions 0/172 dead transitions. [2024-05-12 12:39:10,836 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 172 transitions, 1940 flow [2024-05-12 12:39:10,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 12:39:10,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 12:39:10,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 165 transitions. [2024-05-12 12:39:10,838 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5978260869565217 [2024-05-12 12:39:10,838 INFO L175 Difference]: Start difference. First operand has 125 places, 141 transitions, 1424 flow. Second operand 6 states and 165 transitions. [2024-05-12 12:39:10,838 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 172 transitions, 1940 flow [2024-05-12 12:39:10,918 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 172 transitions, 1851 flow, removed 16 selfloop flow, removed 2 redundant places. [2024-05-12 12:39:10,920 INFO L231 Difference]: Finished difference. Result has 129 places, 147 transitions, 1485 flow [2024-05-12 12:39:10,921 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1335, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1485, PETRI_PLACES=129, PETRI_TRANSITIONS=147} [2024-05-12 12:39:10,921 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 79 predicate places. [2024-05-12 12:39:10,921 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 147 transitions, 1485 flow [2024-05-12 12:39:10,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:39:10,921 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:39:10,922 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:39:10,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-05-12 12:39:10,922 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:39:10,922 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:39:10,922 INFO L85 PathProgramCache]: Analyzing trace with hash -801480475, now seen corresponding path program 2 times [2024-05-12 12:39:10,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:39:10,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51600782] [2024-05-12 12:39:10,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:39:10,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:39:10,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:39:11,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:39:11,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:39:11,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51600782] [2024-05-12 12:39:11,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51600782] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:39:11,050 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:39:11,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 12:39:11,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872910013] [2024-05-12 12:39:11,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:39:11,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 12:39:11,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:39:11,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 12:39:11,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-05-12 12:39:11,100 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 12:39:11,100 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 147 transitions, 1485 flow. Second operand has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:39:11,100 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:39:11,100 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 12:39:11,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:39:11,535 INFO L124 PetriNetUnfolderBase]: 2529/4296 cut-off events. [2024-05-12 12:39:11,535 INFO L125 PetriNetUnfolderBase]: For 56455/56457 co-relation queries the response was YES. [2024-05-12 12:39:11,552 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19905 conditions, 4296 events. 2529/4296 cut-off events. For 56455/56457 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 28125 event pairs, 667 based on Foata normal form. 12/4251 useless extension candidates. Maximal degree in co-relation 19846. Up to 3215 conditions per place. [2024-05-12 12:39:11,566 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 137 selfloop transitions, 35 changer transitions 0/184 dead transitions. [2024-05-12 12:39:11,566 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 184 transitions, 1927 flow [2024-05-12 12:39:11,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 12:39:11,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 12:39:11,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 180 transitions. [2024-05-12 12:39:11,567 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6521739130434783 [2024-05-12 12:39:11,567 INFO L175 Difference]: Start difference. First operand has 129 places, 147 transitions, 1485 flow. Second operand 6 states and 180 transitions. [2024-05-12 12:39:11,567 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 184 transitions, 1927 flow [2024-05-12 12:39:11,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 184 transitions, 1875 flow, removed 20 selfloop flow, removed 2 redundant places. [2024-05-12 12:39:11,650 INFO L231 Difference]: Finished difference. Result has 133 places, 147 transitions, 1509 flow [2024-05-12 12:39:11,650 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1433, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1509, PETRI_PLACES=133, PETRI_TRANSITIONS=147} [2024-05-12 12:39:11,651 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 83 predicate places. [2024-05-12 12:39:11,651 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 147 transitions, 1509 flow [2024-05-12 12:39:11,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:39:11,651 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:39:11,651 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:39:11,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-05-12 12:39:11,651 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:39:11,652 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:39:11,652 INFO L85 PathProgramCache]: Analyzing trace with hash -2118676183, now seen corresponding path program 3 times [2024-05-12 12:39:11,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:39:11,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041690678] [2024-05-12 12:39:11,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:39:11,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:39:11,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:39:11,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:39:11,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:39:11,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041690678] [2024-05-12 12:39:11,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041690678] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:39:11,749 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:39:11,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 12:39:11,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375059717] [2024-05-12 12:39:11,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:39:11,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 12:39:11,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:39:11,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 12:39:11,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-05-12 12:39:11,790 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 12:39:11,790 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 147 transitions, 1509 flow. Second operand has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:39:11,790 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:39:11,790 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 12:39:11,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:39:12,187 INFO L124 PetriNetUnfolderBase]: 2509/4119 cut-off events. [2024-05-12 12:39:12,187 INFO L125 PetriNetUnfolderBase]: For 56883/56897 co-relation queries the response was YES. [2024-05-12 12:39:12,203 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19752 conditions, 4119 events. 2509/4119 cut-off events. For 56883/56897 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 26152 event pairs, 330 based on Foata normal form. 15/4117 useless extension candidates. Maximal degree in co-relation 19691. Up to 2207 conditions per place. [2024-05-12 12:39:12,216 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 130 selfloop transitions, 36 changer transitions 0/178 dead transitions. [2024-05-12 12:39:12,216 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 178 transitions, 1879 flow [2024-05-12 12:39:12,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 12:39:12,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 12:39:12,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 170 transitions. [2024-05-12 12:39:12,217 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6159420289855072 [2024-05-12 12:39:12,217 INFO L175 Difference]: Start difference. First operand has 133 places, 147 transitions, 1509 flow. Second operand 6 states and 170 transitions. [2024-05-12 12:39:12,217 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 178 transitions, 1879 flow [2024-05-12 12:39:12,353 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 178 transitions, 1778 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-05-12 12:39:12,355 INFO L231 Difference]: Finished difference. Result has 133 places, 146 transitions, 1438 flow [2024-05-12 12:39:12,355 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1362, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1438, PETRI_PLACES=133, PETRI_TRANSITIONS=146} [2024-05-12 12:39:12,356 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 83 predicate places. [2024-05-12 12:39:12,356 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 146 transitions, 1438 flow [2024-05-12 12:39:12,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:39:12,356 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:39:12,356 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:39:12,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-05-12 12:39:12,357 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:39:12,357 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:39:12,357 INFO L85 PathProgramCache]: Analyzing trace with hash 267617454, now seen corresponding path program 2 times [2024-05-12 12:39:12,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:39:12,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205412542] [2024-05-12 12:39:12,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:39:12,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:39:12,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:39:12,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:39:12,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:39:12,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205412542] [2024-05-12 12:39:12,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205412542] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:39:12,558 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:39:12,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 12:39:12,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780656738] [2024-05-12 12:39:12,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:39:12,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 12:39:12,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:39:12,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 12:39:12,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-05-12 12:39:12,584 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 12:39:12,585 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 146 transitions, 1438 flow. Second operand has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:39:12,585 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:39:12,585 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 12:39:12,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:39:13,053 INFO L124 PetriNetUnfolderBase]: 2506/4103 cut-off events. [2024-05-12 12:39:13,053 INFO L125 PetriNetUnfolderBase]: For 50765/50765 co-relation queries the response was YES. [2024-05-12 12:39:13,074 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19572 conditions, 4103 events. 2506/4103 cut-off events. For 50765/50765 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 25981 event pairs, 622 based on Foata normal form. 1/4094 useless extension candidates. Maximal degree in co-relation 19510. Up to 3713 conditions per place. [2024-05-12 12:39:13,091 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 135 selfloop transitions, 20 changer transitions 0/167 dead transitions. [2024-05-12 12:39:13,092 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 167 transitions, 1798 flow [2024-05-12 12:39:13,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 12:39:13,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 12:39:13,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 141 transitions. [2024-05-12 12:39:13,093 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6130434782608696 [2024-05-12 12:39:13,093 INFO L175 Difference]: Start difference. First operand has 133 places, 146 transitions, 1438 flow. Second operand 5 states and 141 transitions. [2024-05-12 12:39:13,093 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 167 transitions, 1798 flow [2024-05-12 12:39:13,194 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 167 transitions, 1628 flow, removed 17 selfloop flow, removed 7 redundant places. [2024-05-12 12:39:13,196 INFO L231 Difference]: Finished difference. Result has 131 places, 146 transitions, 1314 flow [2024-05-12 12:39:13,196 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1268, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1314, PETRI_PLACES=131, PETRI_TRANSITIONS=146} [2024-05-12 12:39:13,197 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 81 predicate places. [2024-05-12 12:39:13,197 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 146 transitions, 1314 flow [2024-05-12 12:39:13,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:39:13,197 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:39:13,197 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:39:13,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-05-12 12:39:13,197 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:39:13,198 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:39:13,198 INFO L85 PathProgramCache]: Analyzing trace with hash -39523432, now seen corresponding path program 3 times [2024-05-12 12:39:13,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:39:13,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863914548] [2024-05-12 12:39:13,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:39:13,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:39:13,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:39:13,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:39:13,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:39:13,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863914548] [2024-05-12 12:39:13,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863914548] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:39:13,308 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:39:13,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 12:39:13,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460371196] [2024-05-12 12:39:13,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:39:13,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 12:39:13,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:39:13,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 12:39:13,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-05-12 12:39:13,333 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 12:39:13,333 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 146 transitions, 1314 flow. Second operand has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:39:13,333 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:39:13,333 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 12:39:13,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:39:13,761 INFO L124 PetriNetUnfolderBase]: 2692/4396 cut-off events. [2024-05-12 12:39:13,762 INFO L125 PetriNetUnfolderBase]: For 56094/56096 co-relation queries the response was YES. [2024-05-12 12:39:13,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20067 conditions, 4396 events. 2692/4396 cut-off events. For 56094/56096 co-relation queries the response was YES. Maximal size of possible extension queue 277. Compared 28088 event pairs, 525 based on Foata normal form. 8/4397 useless extension candidates. Maximal degree in co-relation 20006. Up to 3587 conditions per place. [2024-05-12 12:39:13,795 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 127 selfloop transitions, 68 changer transitions 0/207 dead transitions. [2024-05-12 12:39:13,795 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 207 transitions, 2159 flow [2024-05-12 12:39:13,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 12:39:13,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 12:39:13,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 186 transitions. [2024-05-12 12:39:13,796 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6739130434782609 [2024-05-12 12:39:13,796 INFO L175 Difference]: Start difference. First operand has 131 places, 146 transitions, 1314 flow. Second operand 6 states and 186 transitions. [2024-05-12 12:39:13,796 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 207 transitions, 2159 flow [2024-05-12 12:39:13,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 207 transitions, 2093 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-05-12 12:39:13,937 INFO L231 Difference]: Finished difference. Result has 135 places, 170 transitions, 1737 flow [2024-05-12 12:39:13,937 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1248, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1737, PETRI_PLACES=135, PETRI_TRANSITIONS=170} [2024-05-12 12:39:13,938 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 85 predicate places. [2024-05-12 12:39:13,938 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 170 transitions, 1737 flow [2024-05-12 12:39:13,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:39:13,938 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:39:13,938 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:39:13,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-05-12 12:39:13,939 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:39:13,939 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:39:13,939 INFO L85 PathProgramCache]: Analyzing trace with hash -336671408, now seen corresponding path program 1 times [2024-05-12 12:39:13,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:39:13,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768312622] [2024-05-12 12:39:13,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:39:13,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:39:13,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:39:14,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:39:14,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:39:14,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768312622] [2024-05-12 12:39:14,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768312622] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:39:14,047 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:39:14,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 12:39:14,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329555025] [2024-05-12 12:39:14,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:39:14,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 12:39:14,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:39:14,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 12:39:14,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-05-12 12:39:14,072 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 12:39:14,073 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 170 transitions, 1737 flow. Second operand has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:39:14,073 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:39:14,073 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 12:39:14,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:39:14,491 INFO L124 PetriNetUnfolderBase]: 2739/4515 cut-off events. [2024-05-12 12:39:14,491 INFO L125 PetriNetUnfolderBase]: For 65178/65190 co-relation queries the response was YES. [2024-05-12 12:39:14,511 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22412 conditions, 4515 events. 2739/4515 cut-off events. For 65178/65190 co-relation queries the response was YES. Maximal size of possible extension queue 280. Compared 29210 event pairs, 589 based on Foata normal form. 6/4504 useless extension candidates. Maximal degree in co-relation 22348. Up to 3583 conditions per place. [2024-05-12 12:39:14,528 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 121 selfloop transitions, 77 changer transitions 0/210 dead transitions. [2024-05-12 12:39:14,528 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 210 transitions, 2515 flow [2024-05-12 12:39:14,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 12:39:14,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 12:39:14,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 176 transitions. [2024-05-12 12:39:14,532 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6376811594202898 [2024-05-12 12:39:14,532 INFO L175 Difference]: Start difference. First operand has 135 places, 170 transitions, 1737 flow. Second operand 6 states and 176 transitions. [2024-05-12 12:39:14,532 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 210 transitions, 2515 flow [2024-05-12 12:39:14,646 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 210 transitions, 2465 flow, removed 19 selfloop flow, removed 1 redundant places. [2024-05-12 12:39:14,648 INFO L231 Difference]: Finished difference. Result has 141 places, 183 transitions, 2033 flow [2024-05-12 12:39:14,648 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1688, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2033, PETRI_PLACES=141, PETRI_TRANSITIONS=183} [2024-05-12 12:39:14,649 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 91 predicate places. [2024-05-12 12:39:14,649 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 183 transitions, 2033 flow [2024-05-12 12:39:14,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:39:14,649 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:39:14,649 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:39:14,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-05-12 12:39:14,649 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:39:14,649 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:39:14,649 INFO L85 PathProgramCache]: Analyzing trace with hash 90670260, now seen corresponding path program 2 times [2024-05-12 12:39:14,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:39:14,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279218845] [2024-05-12 12:39:14,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:39:14,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:39:14,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:39:14,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:39:14,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:39:14,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279218845] [2024-05-12 12:39:14,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279218845] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:39:14,756 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:39:14,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 12:39:14,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071895933] [2024-05-12 12:39:14,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:39:14,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 12:39:14,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:39:14,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 12:39:14,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-05-12 12:39:14,782 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 12:39:14,783 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 183 transitions, 2033 flow. Second operand has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:39:14,783 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:39:14,783 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 12:39:14,783 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:39:15,300 INFO L124 PetriNetUnfolderBase]: 2865/4757 cut-off events. [2024-05-12 12:39:15,300 INFO L125 PetriNetUnfolderBase]: For 73930/73930 co-relation queries the response was YES. [2024-05-12 12:39:15,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24824 conditions, 4757 events. 2865/4757 cut-off events. For 73930/73930 co-relation queries the response was YES. Maximal size of possible extension queue 301. Compared 31291 event pairs, 940 based on Foata normal form. 4/4733 useless extension candidates. Maximal degree in co-relation 24757. Up to 4136 conditions per place. [2024-05-12 12:39:15,334 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 181 selfloop transitions, 37 changer transitions 0/230 dead transitions. [2024-05-12 12:39:15,334 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 230 transitions, 2916 flow [2024-05-12 12:39:15,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 12:39:15,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 12:39:15,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 188 transitions. [2024-05-12 12:39:15,335 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5838509316770186 [2024-05-12 12:39:15,335 INFO L175 Difference]: Start difference. First operand has 141 places, 183 transitions, 2033 flow. Second operand 7 states and 188 transitions. [2024-05-12 12:39:15,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 230 transitions, 2916 flow [2024-05-12 12:39:15,465 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 230 transitions, 2820 flow, removed 48 selfloop flow, removed 0 redundant places. [2024-05-12 12:39:15,468 INFO L231 Difference]: Finished difference. Result has 149 places, 204 transitions, 2392 flow [2024-05-12 12:39:15,468 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1959, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2392, PETRI_PLACES=149, PETRI_TRANSITIONS=204} [2024-05-12 12:39:15,468 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 99 predicate places. [2024-05-12 12:39:15,468 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 204 transitions, 2392 flow [2024-05-12 12:39:15,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:39:15,469 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:39:15,469 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:39:15,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-05-12 12:39:15,469 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:39:15,469 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:39:15,469 INFO L85 PathProgramCache]: Analyzing trace with hash -39338734, now seen corresponding path program 3 times [2024-05-12 12:39:15,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:39:15,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421173804] [2024-05-12 12:39:15,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:39:15,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:39:15,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:39:15,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:39:15,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:39:15,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421173804] [2024-05-12 12:39:15,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421173804] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:39:15,571 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:39:15,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 12:39:15,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73199489] [2024-05-12 12:39:15,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:39:15,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 12:39:15,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:39:15,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 12:39:15,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-05-12 12:39:15,596 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 12:39:15,596 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 204 transitions, 2392 flow. Second operand has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:39:15,597 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:39:15,597 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 12:39:15,597 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:39:16,089 INFO L124 PetriNetUnfolderBase]: 2869/4665 cut-off events. [2024-05-12 12:39:16,090 INFO L125 PetriNetUnfolderBase]: For 75903/75903 co-relation queries the response was YES. [2024-05-12 12:39:16,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24977 conditions, 4665 events. 2869/4665 cut-off events. For 75903/75903 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 29926 event pairs, 510 based on Foata normal form. 6/4667 useless extension candidates. Maximal degree in co-relation 24906. Up to 3728 conditions per place. [2024-05-12 12:39:16,130 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 136 selfloop transitions, 99 changer transitions 0/247 dead transitions. [2024-05-12 12:39:16,130 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 247 transitions, 3153 flow [2024-05-12 12:39:16,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 12:39:16,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 12:39:16,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 209 transitions. [2024-05-12 12:39:16,131 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6490683229813664 [2024-05-12 12:39:16,131 INFO L175 Difference]: Start difference. First operand has 149 places, 204 transitions, 2392 flow. Second operand 7 states and 209 transitions. [2024-05-12 12:39:16,132 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 247 transitions, 3153 flow [2024-05-12 12:39:16,286 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 247 transitions, 3023 flow, removed 41 selfloop flow, removed 3 redundant places. [2024-05-12 12:39:16,288 INFO L231 Difference]: Finished difference. Result has 153 places, 209 transitions, 2577 flow [2024-05-12 12:39:16,289 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2262, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2577, PETRI_PLACES=153, PETRI_TRANSITIONS=209} [2024-05-12 12:39:16,289 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 103 predicate places. [2024-05-12 12:39:16,289 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 209 transitions, 2577 flow [2024-05-12 12:39:16,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:39:16,289 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:39:16,289 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:39:16,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-05-12 12:39:16,289 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:39:16,290 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:39:16,290 INFO L85 PathProgramCache]: Analyzing trace with hash -39092470, now seen corresponding path program 1 times [2024-05-12 12:39:16,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:39:16,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568199752] [2024-05-12 12:39:16,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:39:16,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:39:16,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:39:16,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:39:16,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:39:16,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568199752] [2024-05-12 12:39:16,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568199752] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:39:16,401 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:39:16,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 12:39:16,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818303554] [2024-05-12 12:39:16,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:39:16,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 12:39:16,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:39:16,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 12:39:16,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-05-12 12:39:16,451 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 12:39:16,451 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 209 transitions, 2577 flow. Second operand has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:39:16,451 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:39:16,451 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 12:39:16,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:39:16,915 INFO L124 PetriNetUnfolderBase]: 2864/4665 cut-off events. [2024-05-12 12:39:16,915 INFO L125 PetriNetUnfolderBase]: For 78827/78827 co-relation queries the response was YES. [2024-05-12 12:39:16,937 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25572 conditions, 4665 events. 2864/4665 cut-off events. For 78827/78827 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 30019 event pairs, 975 based on Foata normal form. 2/4648 useless extension candidates. Maximal degree in co-relation 25500. Up to 4229 conditions per place. [2024-05-12 12:39:16,954 INFO L140 encePairwiseOnDemand]: 41/46 looper letters, 202 selfloop transitions, 10 changer transitions 0/224 dead transitions. [2024-05-12 12:39:16,954 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 224 transitions, 3061 flow [2024-05-12 12:39:16,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-05-12 12:39:16,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-05-12 12:39:16,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 111 transitions. [2024-05-12 12:39:16,955 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6032608695652174 [2024-05-12 12:39:16,955 INFO L175 Difference]: Start difference. First operand has 153 places, 209 transitions, 2577 flow. Second operand 4 states and 111 transitions. [2024-05-12 12:39:16,955 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 224 transitions, 3061 flow [2024-05-12 12:39:17,140 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 224 transitions, 2883 flow, removed 26 selfloop flow, removed 4 redundant places. [2024-05-12 12:39:17,142 INFO L231 Difference]: Finished difference. Result has 153 places, 211 transitions, 2458 flow [2024-05-12 12:39:17,143 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2399, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=2458, PETRI_PLACES=153, PETRI_TRANSITIONS=211} [2024-05-12 12:39:17,143 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 103 predicate places. [2024-05-12 12:39:17,143 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 211 transitions, 2458 flow [2024-05-12 12:39:17,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:39:17,143 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:39:17,144 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:39:17,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-05-12 12:39:17,144 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:39:17,144 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:39:17,144 INFO L85 PathProgramCache]: Analyzing trace with hash -867635274, now seen corresponding path program 1 times [2024-05-12 12:39:17,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:39:17,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087232472] [2024-05-12 12:39:17,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:39:17,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:39:17,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:39:17,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:39:17,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:39:17,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087232472] [2024-05-12 12:39:17,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087232472] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:39:17,263 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:39:17,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:39:17,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080417607] [2024-05-12 12:39:17,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:39:17,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 12:39:17,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:39:17,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 12:39:17,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-05-12 12:39:17,293 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 12:39:17,294 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 211 transitions, 2458 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:39:17,294 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:39:17,294 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 12:39:17,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:39:17,826 INFO L124 PetriNetUnfolderBase]: 2939/4867 cut-off events. [2024-05-12 12:39:17,827 INFO L125 PetriNetUnfolderBase]: For 87451/87453 co-relation queries the response was YES. [2024-05-12 12:39:17,851 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25963 conditions, 4867 events. 2939/4867 cut-off events. For 87451/87453 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 32131 event pairs, 603 based on Foata normal form. 3/4842 useless extension candidates. Maximal degree in co-relation 25890. Up to 3378 conditions per place. [2024-05-12 12:39:17,871 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 131 selfloop transitions, 124 changer transitions 0/267 dead transitions. [2024-05-12 12:39:17,871 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 267 transitions, 3520 flow [2024-05-12 12:39:17,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 12:39:17,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 12:39:17,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 209 transitions. [2024-05-12 12:39:17,872 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6490683229813664 [2024-05-12 12:39:17,872 INFO L175 Difference]: Start difference. First operand has 153 places, 211 transitions, 2458 flow. Second operand 7 states and 209 transitions. [2024-05-12 12:39:17,872 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 267 transitions, 3520 flow [2024-05-12 12:39:18,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 267 transitions, 3473 flow, removed 15 selfloop flow, removed 2 redundant places. [2024-05-12 12:39:18,079 INFO L231 Difference]: Finished difference. Result has 160 places, 230 transitions, 3049 flow [2024-05-12 12:39:18,079 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2411, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3049, PETRI_PLACES=160, PETRI_TRANSITIONS=230} [2024-05-12 12:39:18,079 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 110 predicate places. [2024-05-12 12:39:18,080 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 230 transitions, 3049 flow [2024-05-12 12:39:18,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:39:18,080 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:39:18,080 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:39:18,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-05-12 12:39:18,080 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:39:18,080 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:39:18,080 INFO L85 PathProgramCache]: Analyzing trace with hash -864091137, now seen corresponding path program 1 times [2024-05-12 12:39:18,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:39:18,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628904978] [2024-05-12 12:39:18,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:39:18,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:39:18,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:39:18,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:39:18,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:39:18,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628904978] [2024-05-12 12:39:18,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628904978] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:39:18,177 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:39:18,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 12:39:18,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836471725] [2024-05-12 12:39:18,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:39:18,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 12:39:18,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:39:18,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 12:39:18,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-05-12 12:39:18,207 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 12:39:18,207 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 230 transitions, 3049 flow. Second operand has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:39:18,207 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:39:18,208 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 12:39:18,208 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:39:18,838 INFO L124 PetriNetUnfolderBase]: 2989/4878 cut-off events. [2024-05-12 12:39:18,838 INFO L125 PetriNetUnfolderBase]: For 97838/97840 co-relation queries the response was YES. [2024-05-12 12:39:18,867 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28846 conditions, 4878 events. 2989/4878 cut-off events. For 97838/97840 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 31733 event pairs, 580 based on Foata normal form. 2/4859 useless extension candidates. Maximal degree in co-relation 28770. Up to 3834 conditions per place. [2024-05-12 12:39:18,891 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 167 selfloop transitions, 91 changer transitions 0/270 dead transitions. [2024-05-12 12:39:18,891 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 270 transitions, 4040 flow [2024-05-12 12:39:18,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 12:39:18,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 12:39:18,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 177 transitions. [2024-05-12 12:39:18,892 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6413043478260869 [2024-05-12 12:39:18,892 INFO L175 Difference]: Start difference. First operand has 160 places, 230 transitions, 3049 flow. Second operand 6 states and 177 transitions. [2024-05-12 12:39:18,892 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 270 transitions, 4040 flow [2024-05-12 12:39:19,123 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 270 transitions, 3956 flow, removed 39 selfloop flow, removed 1 redundant places. [2024-05-12 12:39:19,127 INFO L231 Difference]: Finished difference. Result has 166 places, 240 transitions, 3378 flow [2024-05-12 12:39:19,127 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2965, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3378, PETRI_PLACES=166, PETRI_TRANSITIONS=240} [2024-05-12 12:39:19,127 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 116 predicate places. [2024-05-12 12:39:19,128 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 240 transitions, 3378 flow [2024-05-12 12:39:19,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:39:19,128 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:39:19,128 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:39:19,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-05-12 12:39:19,128 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:39:19,128 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:39:19,128 INFO L85 PathProgramCache]: Analyzing trace with hash 1603382943, now seen corresponding path program 2 times [2024-05-12 12:39:19,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:39:19,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38896869] [2024-05-12 12:39:19,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:39:19,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:39:19,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:39:19,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:39:19,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:39:19,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38896869] [2024-05-12 12:39:19,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38896869] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:39:19,233 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:39:19,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 12:39:19,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051848442] [2024-05-12 12:39:19,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:39:19,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 12:39:19,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:39:19,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 12:39:19,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-05-12 12:39:19,263 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 12:39:19,263 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 240 transitions, 3378 flow. Second operand has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:39:19,263 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:39:19,263 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 12:39:19,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:39:19,840 INFO L124 PetriNetUnfolderBase]: 2983/4901 cut-off events. [2024-05-12 12:39:19,840 INFO L125 PetriNetUnfolderBase]: For 100500/100502 co-relation queries the response was YES. [2024-05-12 12:39:19,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28671 conditions, 4901 events. 2983/4901 cut-off events. For 100500/100502 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 32107 event pairs, 581 based on Foata normal form. 2/4877 useless extension candidates. Maximal degree in co-relation 28591. Up to 3831 conditions per place. [2024-05-12 12:39:19,891 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 168 selfloop transitions, 87 changer transitions 0/267 dead transitions. [2024-05-12 12:39:19,891 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 267 transitions, 4160 flow [2024-05-12 12:39:19,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 12:39:19,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 12:39:19,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 175 transitions. [2024-05-12 12:39:19,892 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6340579710144928 [2024-05-12 12:39:19,892 INFO L175 Difference]: Start difference. First operand has 166 places, 240 transitions, 3378 flow. Second operand 6 states and 175 transitions. [2024-05-12 12:39:19,892 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 267 transitions, 4160 flow [2024-05-12 12:39:20,123 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 267 transitions, 4033 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-05-12 12:39:20,127 INFO L231 Difference]: Finished difference. Result has 170 places, 240 transitions, 3434 flow [2024-05-12 12:39:20,127 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3251, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3434, PETRI_PLACES=170, PETRI_TRANSITIONS=240} [2024-05-12 12:39:20,127 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 120 predicate places. [2024-05-12 12:39:20,127 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 240 transitions, 3434 flow [2024-05-12 12:39:20,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:39:20,128 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:39:20,128 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:39:20,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-05-12 12:39:20,128 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:39:20,128 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:39:20,128 INFO L85 PathProgramCache]: Analyzing trace with hash -858369684, now seen corresponding path program 2 times [2024-05-12 12:39:20,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:39:20,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200234522] [2024-05-12 12:39:20,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:39:20,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:39:20,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:39:20,236 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:39:20,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:39:20,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200234522] [2024-05-12 12:39:20,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200234522] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:39:20,237 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:39:20,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:39:20,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138769578] [2024-05-12 12:39:20,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:39:20,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 12:39:20,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:39:20,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 12:39:20,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-05-12 12:39:20,264 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 12:39:20,265 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 240 transitions, 3434 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:39:20,265 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:39:20,265 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 12:39:20,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:39:20,883 INFO L124 PetriNetUnfolderBase]: 3104/5070 cut-off events. [2024-05-12 12:39:20,883 INFO L125 PetriNetUnfolderBase]: For 109671/109673 co-relation queries the response was YES. [2024-05-12 12:39:20,912 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30220 conditions, 5070 events. 3104/5070 cut-off events. For 109671/109673 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 33298 event pairs, 609 based on Foata normal form. 3/5044 useless extension candidates. Maximal degree in co-relation 30139. Up to 3474 conditions per place. [2024-05-12 12:39:20,934 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 146 selfloop transitions, 129 changer transitions 0/287 dead transitions. [2024-05-12 12:39:20,934 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 287 transitions, 4592 flow [2024-05-12 12:39:20,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 12:39:20,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 12:39:20,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 204 transitions. [2024-05-12 12:39:20,935 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6335403726708074 [2024-05-12 12:39:20,935 INFO L175 Difference]: Start difference. First operand has 170 places, 240 transitions, 3434 flow. Second operand 7 states and 204 transitions. [2024-05-12 12:39:20,935 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 287 transitions, 4592 flow [2024-05-12 12:39:21,200 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 287 transitions, 4432 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-05-12 12:39:21,204 INFO L231 Difference]: Finished difference. Result has 175 places, 254 transitions, 3772 flow [2024-05-12 12:39:21,204 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3274, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3772, PETRI_PLACES=175, PETRI_TRANSITIONS=254} [2024-05-12 12:39:21,204 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 125 predicate places. [2024-05-12 12:39:21,204 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 254 transitions, 3772 flow [2024-05-12 12:39:21,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:39:21,204 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:39:21,204 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:39:21,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-05-12 12:39:21,205 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:39:21,205 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:39:21,205 INFO L85 PathProgramCache]: Analyzing trace with hash 1608943506, now seen corresponding path program 3 times [2024-05-12 12:39:21,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:39:21,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409206772] [2024-05-12 12:39:21,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:39:21,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:39:21,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:39:21,305 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:39:21,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:39:21,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409206772] [2024-05-12 12:39:21,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409206772] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:39:21,306 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:39:21,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:39:21,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210353945] [2024-05-12 12:39:21,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:39:21,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 12:39:21,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:39:21,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 12:39:21,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-05-12 12:39:21,344 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 12:39:21,344 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 254 transitions, 3772 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:39:21,344 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:39:21,344 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 12:39:21,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:39:21,988 INFO L124 PetriNetUnfolderBase]: 3099/5066 cut-off events. [2024-05-12 12:39:21,989 INFO L125 PetriNetUnfolderBase]: For 114159/114161 co-relation queries the response was YES. [2024-05-12 12:39:22,017 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30725 conditions, 5066 events. 3099/5066 cut-off events. For 114159/114161 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 33261 event pairs, 611 based on Foata normal form. 3/5040 useless extension candidates. Maximal degree in co-relation 30642. Up to 3472 conditions per place. [2024-05-12 12:39:22,038 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 144 selfloop transitions, 130 changer transitions 0/286 dead transitions. [2024-05-12 12:39:22,038 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 286 transitions, 4657 flow [2024-05-12 12:39:22,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 12:39:22,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 12:39:22,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 204 transitions. [2024-05-12 12:39:22,039 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6335403726708074 [2024-05-12 12:39:22,039 INFO L175 Difference]: Start difference. First operand has 175 places, 254 transitions, 3772 flow. Second operand 7 states and 204 transitions. [2024-05-12 12:39:22,039 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 286 transitions, 4657 flow [2024-05-12 12:39:22,311 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 286 transitions, 4401 flow, removed 43 selfloop flow, removed 3 redundant places. [2024-05-12 12:39:22,315 INFO L231 Difference]: Finished difference. Result has 179 places, 255 transitions, 3807 flow [2024-05-12 12:39:22,315 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3516, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3807, PETRI_PLACES=179, PETRI_TRANSITIONS=255} [2024-05-12 12:39:22,316 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 129 predicate places. [2024-05-12 12:39:22,316 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 255 transitions, 3807 flow [2024-05-12 12:39:22,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:39:22,316 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:39:22,316 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:39:22,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-05-12 12:39:22,317 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:39:22,317 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:39:22,317 INFO L85 PathProgramCache]: Analyzing trace with hash 1126342843, now seen corresponding path program 3 times [2024-05-12 12:39:22,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:39:22,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551698937] [2024-05-12 12:39:22,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:39:22,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:39:22,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:39:22,403 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:39:22,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:39:22,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551698937] [2024-05-12 12:39:22,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551698937] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:39:22,404 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:39:22,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 12:39:22,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840251277] [2024-05-12 12:39:22,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:39:22,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 12:39:22,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:39:22,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 12:39:22,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-05-12 12:39:22,427 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 12:39:22,428 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 255 transitions, 3807 flow. Second operand has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:39:22,428 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:39:22,428 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 12:39:22,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:39:23,044 INFO L124 PetriNetUnfolderBase]: 3085/5075 cut-off events. [2024-05-12 12:39:23,044 INFO L125 PetriNetUnfolderBase]: For 120638/120650 co-relation queries the response was YES. [2024-05-12 12:39:23,069 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30458 conditions, 5075 events. 3085/5075 cut-off events. For 120638/120650 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 33599 event pairs, 596 based on Foata normal form. 5/5053 useless extension candidates. Maximal degree in co-relation 30374. Up to 3976 conditions per place. [2024-05-12 12:39:23,089 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 177 selfloop transitions, 93 changer transitions 0/282 dead transitions. [2024-05-12 12:39:23,090 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 282 transitions, 4637 flow [2024-05-12 12:39:23,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 12:39:23,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 12:39:23,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 174 transitions. [2024-05-12 12:39:23,090 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6304347826086957 [2024-05-12 12:39:23,090 INFO L175 Difference]: Start difference. First operand has 179 places, 255 transitions, 3807 flow. Second operand 6 states and 174 transitions. [2024-05-12 12:39:23,091 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 282 transitions, 4637 flow [2024-05-12 12:39:23,410 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 282 transitions, 4364 flow, removed 25 selfloop flow, removed 4 redundant places. [2024-05-12 12:39:23,414 INFO L231 Difference]: Finished difference. Result has 181 places, 255 transitions, 3727 flow [2024-05-12 12:39:23,414 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3534, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=255, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3727, PETRI_PLACES=181, PETRI_TRANSITIONS=255} [2024-05-12 12:39:23,415 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 131 predicate places. [2024-05-12 12:39:23,415 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 255 transitions, 3727 flow [2024-05-12 12:39:23,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:39:23,415 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:39:23,415 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:39:23,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-05-12 12:39:23,415 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:39:23,416 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:39:23,416 INFO L85 PathProgramCache]: Analyzing trace with hash -719872317, now seen corresponding path program 4 times [2024-05-12 12:39:23,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:39:23,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140186305] [2024-05-12 12:39:23,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:39:23,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:39:23,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:39:23,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:39:23,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:39:23,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140186305] [2024-05-12 12:39:23,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140186305] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:39:23,507 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:39:23,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 12:39:23,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367690116] [2024-05-12 12:39:23,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:39:23,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 12:39:23,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:39:23,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 12:39:23,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-05-12 12:39:23,529 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 12:39:23,529 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 255 transitions, 3727 flow. Second operand has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:39:23,529 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:39:23,529 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 12:39:23,530 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:39:24,140 INFO L124 PetriNetUnfolderBase]: 3069/5074 cut-off events. [2024-05-12 12:39:24,140 INFO L125 PetriNetUnfolderBase]: For 117743/117743 co-relation queries the response was YES. [2024-05-12 12:39:24,169 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29852 conditions, 5074 events. 3069/5074 cut-off events. For 117743/117743 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 33606 event pairs, 965 based on Foata normal form. 4/5046 useless extension candidates. Maximal degree in co-relation 29767. Up to 4421 conditions per place. [2024-05-12 12:39:24,190 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 231 selfloop transitions, 37 changer transitions 0/280 dead transitions. [2024-05-12 12:39:24,190 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 280 transitions, 4327 flow [2024-05-12 12:39:24,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 12:39:24,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 12:39:24,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 187 transitions. [2024-05-12 12:39:24,191 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5807453416149069 [2024-05-12 12:39:24,191 INFO L175 Difference]: Start difference. First operand has 181 places, 255 transitions, 3727 flow. Second operand 7 states and 187 transitions. [2024-05-12 12:39:24,191 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 280 transitions, 4327 flow [2024-05-12 12:39:24,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 280 transitions, 3975 flow, removed 25 selfloop flow, removed 8 redundant places. [2024-05-12 12:39:24,519 INFO L231 Difference]: Finished difference. Result has 180 places, 255 transitions, 3464 flow [2024-05-12 12:39:24,520 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3376, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=255, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3464, PETRI_PLACES=180, PETRI_TRANSITIONS=255} [2024-05-12 12:39:24,520 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 130 predicate places. [2024-05-12 12:39:24,520 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 255 transitions, 3464 flow [2024-05-12 12:39:24,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:39:24,520 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:39:24,520 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:39:24,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-05-12 12:39:24,520 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:39:24,521 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:39:24,521 INFO L85 PathProgramCache]: Analyzing trace with hash -1219507937, now seen corresponding path program 5 times [2024-05-12 12:39:24,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:39:24,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297246896] [2024-05-12 12:39:24,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:39:24,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:39:24,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:39:24,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:39:24,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:39:24,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297246896] [2024-05-12 12:39:24,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297246896] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:39:24,618 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:39:24,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 12:39:24,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528819568] [2024-05-12 12:39:24,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:39:24,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 12:39:24,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:39:24,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 12:39:24,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-05-12 12:39:24,644 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 12:39:24,644 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 255 transitions, 3464 flow. Second operand has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:39:24,645 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:39:24,645 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 12:39:24,645 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:39:25,289 INFO L124 PetriNetUnfolderBase]: 3067/4972 cut-off events. [2024-05-12 12:39:25,289 INFO L125 PetriNetUnfolderBase]: For 113693/113693 co-relation queries the response was YES. [2024-05-12 12:39:25,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28859 conditions, 4972 events. 3067/4972 cut-off events. For 113693/113693 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 32337 event pairs, 507 based on Foata normal form. 4/4972 useless extension candidates. Maximal degree in co-relation 28775. Up to 3991 conditions per place. [2024-05-12 12:39:25,332 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 182 selfloop transitions, 102 changer transitions 0/296 dead transitions. [2024-05-12 12:39:25,332 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 296 transitions, 4352 flow [2024-05-12 12:39:25,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 12:39:25,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 12:39:25,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 209 transitions. [2024-05-12 12:39:25,336 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6490683229813664 [2024-05-12 12:39:25,336 INFO L175 Difference]: Start difference. First operand has 180 places, 255 transitions, 3464 flow. Second operand 7 states and 209 transitions. [2024-05-12 12:39:25,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 296 transitions, 4352 flow [2024-05-12 12:39:25,610 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 296 transitions, 4278 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-05-12 12:39:25,614 INFO L231 Difference]: Finished difference. Result has 181 places, 258 transitions, 3698 flow [2024-05-12 12:39:25,614 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3390, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=255, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3698, PETRI_PLACES=181, PETRI_TRANSITIONS=258} [2024-05-12 12:39:25,615 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 131 predicate places. [2024-05-12 12:39:25,615 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 258 transitions, 3698 flow [2024-05-12 12:39:25,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:39:25,615 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:39:25,615 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:39:25,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-05-12 12:39:25,615 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:39:25,615 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:39:25,615 INFO L85 PathProgramCache]: Analyzing trace with hash -1031282447, now seen corresponding path program 6 times [2024-05-12 12:39:25,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:39:25,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553320662] [2024-05-12 12:39:25,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:39:25,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:39:25,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:39:25,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:39:25,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:39:25,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553320662] [2024-05-12 12:39:25,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553320662] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:39:25,715 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:39:25,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 12:39:25,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891447868] [2024-05-12 12:39:25,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:39:25,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 12:39:25,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:39:25,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 12:39:25,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-05-12 12:39:25,754 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 12:39:25,754 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 258 transitions, 3698 flow. Second operand has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:39:25,754 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:39:25,754 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 12:39:25,754 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:39:26,379 INFO L124 PetriNetUnfolderBase]: 3043/5003 cut-off events. [2024-05-12 12:39:26,380 INFO L125 PetriNetUnfolderBase]: For 119966/119968 co-relation queries the response was YES. [2024-05-12 12:39:26,412 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29162 conditions, 5003 events. 3043/5003 cut-off events. For 119966/119968 co-relation queries the response was YES. Maximal size of possible extension queue 326. Compared 33058 event pairs, 542 based on Foata normal form. 6/4989 useless extension candidates. Maximal degree in co-relation 29077. Up to 3971 conditions per place. [2024-05-12 12:39:26,434 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 182 selfloop transitions, 95 changer transitions 0/289 dead transitions. [2024-05-12 12:39:26,434 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 289 transitions, 4408 flow [2024-05-12 12:39:26,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 12:39:26,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 12:39:26,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 181 transitions. [2024-05-12 12:39:26,435 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6557971014492754 [2024-05-12 12:39:26,435 INFO L175 Difference]: Start difference. First operand has 181 places, 258 transitions, 3698 flow. Second operand 6 states and 181 transitions. [2024-05-12 12:39:26,435 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 289 transitions, 4408 flow [2024-05-12 12:39:26,811 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 289 transitions, 4180 flow, removed 42 selfloop flow, removed 6 redundant places. [2024-05-12 12:39:26,815 INFO L231 Difference]: Finished difference. Result has 181 places, 258 transitions, 3684 flow [2024-05-12 12:39:26,815 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3474, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3684, PETRI_PLACES=181, PETRI_TRANSITIONS=258} [2024-05-12 12:39:26,815 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 131 predicate places. [2024-05-12 12:39:26,815 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 258 transitions, 3684 flow [2024-05-12 12:39:26,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:39:26,816 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:39:26,816 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:39:26,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-05-12 12:39:26,816 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:39:26,816 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:39:26,816 INFO L85 PathProgramCache]: Analyzing trace with hash -1225225484, now seen corresponding path program 4 times [2024-05-12 12:39:26,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:39:26,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028547170] [2024-05-12 12:39:26,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:39:26,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:39:26,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:39:26,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:39:26,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:39:26,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028547170] [2024-05-12 12:39:26,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028547170] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:39:26,917 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:39:26,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:39:26,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114551292] [2024-05-12 12:39:26,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:39:26,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 12:39:26,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:39:26,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 12:39:26,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-05-12 12:39:26,943 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 12:39:26,943 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 258 transitions, 3684 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:39:26,943 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:39:26,943 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 12:39:26,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:39:27,615 INFO L124 PetriNetUnfolderBase]: 3146/5109 cut-off events. [2024-05-12 12:39:27,616 INFO L125 PetriNetUnfolderBase]: For 116135/116137 co-relation queries the response was YES. [2024-05-12 12:39:27,642 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30058 conditions, 5109 events. 3146/5109 cut-off events. For 116135/116137 co-relation queries the response was YES. Maximal size of possible extension queue 338. Compared 33408 event pairs, 524 based on Foata normal form. 5/5104 useless extension candidates. Maximal degree in co-relation 29974. Up to 3942 conditions per place. [2024-05-12 12:39:27,662 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 187 selfloop transitions, 114 changer transitions 0/313 dead transitions. [2024-05-12 12:39:27,662 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 313 transitions, 4872 flow [2024-05-12 12:39:27,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 12:39:27,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 12:39:27,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 211 transitions. [2024-05-12 12:39:27,663 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.65527950310559 [2024-05-12 12:39:27,663 INFO L175 Difference]: Start difference. First operand has 181 places, 258 transitions, 3684 flow. Second operand 7 states and 211 transitions. [2024-05-12 12:39:27,663 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 313 transitions, 4872 flow [2024-05-12 12:39:27,978 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 313 transitions, 4582 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-05-12 12:39:27,982 INFO L231 Difference]: Finished difference. Result has 183 places, 273 transitions, 3994 flow [2024-05-12 12:39:27,982 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3400, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3994, PETRI_PLACES=183, PETRI_TRANSITIONS=273} [2024-05-12 12:39:27,982 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 133 predicate places. [2024-05-12 12:39:27,983 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 273 transitions, 3994 flow [2024-05-12 12:39:27,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:39:27,983 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:39:27,983 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:39:27,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-05-12 12:39:27,983 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:39:27,984 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:39:27,984 INFO L85 PathProgramCache]: Analyzing trace with hash -1031274914, now seen corresponding path program 5 times [2024-05-12 12:39:27,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:39:27,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694016506] [2024-05-12 12:39:27,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:39:27,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:39:27,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:39:28,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:39:28,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:39:28,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694016506] [2024-05-12 12:39:28,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694016506] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:39:28,084 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:39:28,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:39:28,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660393134] [2024-05-12 12:39:28,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:39:28,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 12:39:28,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:39:28,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 12:39:28,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-05-12 12:39:28,133 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 12:39:28,138 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 273 transitions, 3994 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:39:28,139 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:39:28,139 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 12:39:28,139 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:39:28,812 INFO L124 PetriNetUnfolderBase]: 3169/5477 cut-off events. [2024-05-12 12:39:28,813 INFO L125 PetriNetUnfolderBase]: For 121317/121319 co-relation queries the response was YES. [2024-05-12 12:39:28,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31241 conditions, 5477 events. 3169/5477 cut-off events. For 121317/121319 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 37621 event pairs, 707 based on Foata normal form. 5/5457 useless extension candidates. Maximal degree in co-relation 31155. Up to 3965 conditions per place. [2024-05-12 12:39:28,871 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 193 selfloop transitions, 108 changer transitions 0/313 dead transitions. [2024-05-12 12:39:28,871 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 313 transitions, 5049 flow [2024-05-12 12:39:28,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 12:39:28,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 12:39:28,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 204 transitions. [2024-05-12 12:39:28,872 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6335403726708074 [2024-05-12 12:39:28,872 INFO L175 Difference]: Start difference. First operand has 183 places, 273 transitions, 3994 flow. Second operand 7 states and 204 transitions. [2024-05-12 12:39:28,872 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 313 transitions, 5049 flow [2024-05-12 12:39:29,246 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 313 transitions, 4978 flow, removed 27 selfloop flow, removed 1 redundant places. [2024-05-12 12:39:29,251 INFO L231 Difference]: Finished difference. Result has 190 places, 279 transitions, 4278 flow [2024-05-12 12:39:29,251 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3925, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4278, PETRI_PLACES=190, PETRI_TRANSITIONS=279} [2024-05-12 12:39:29,251 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 140 predicate places. [2024-05-12 12:39:29,252 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 279 transitions, 4278 flow [2024-05-12 12:39:29,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:39:29,252 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:39:29,252 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:39:29,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-05-12 12:39:29,252 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:39:29,252 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:39:29,252 INFO L85 PathProgramCache]: Analyzing trace with hash 1918107258, now seen corresponding path program 1 times [2024-05-12 12:39:29,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:39:29,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977694127] [2024-05-12 12:39:29,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:39:29,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:39:29,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:39:29,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:39:29,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:39:29,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977694127] [2024-05-12 12:39:29,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977694127] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:39:29,350 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:39:29,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:39:29,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972460636] [2024-05-12 12:39:29,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:39:29,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 12:39:29,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:39:29,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 12:39:29,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-05-12 12:39:29,387 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 12:39:29,387 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 279 transitions, 4278 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:39:29,387 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:39:29,387 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 12:39:29,387 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:39:30,116 INFO L124 PetriNetUnfolderBase]: 3216/5295 cut-off events. [2024-05-12 12:39:30,116 INFO L125 PetriNetUnfolderBase]: For 130529/130541 co-relation queries the response was YES. [2024-05-12 12:39:30,148 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32362 conditions, 5295 events. 3216/5295 cut-off events. For 130529/130541 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 35221 event pairs, 662 based on Foata normal form. 6/5260 useless extension candidates. Maximal degree in co-relation 32273. Up to 3596 conditions per place. [2024-05-12 12:39:30,174 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 130 selfloop transitions, 178 changer transitions 0/320 dead transitions. [2024-05-12 12:39:30,174 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 320 transitions, 5398 flow [2024-05-12 12:39:30,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 12:39:30,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 12:39:30,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 203 transitions. [2024-05-12 12:39:30,175 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6304347826086957 [2024-05-12 12:39:30,175 INFO L175 Difference]: Start difference. First operand has 190 places, 279 transitions, 4278 flow. Second operand 7 states and 203 transitions. [2024-05-12 12:39:30,175 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 320 transitions, 5398 flow [2024-05-12 12:39:30,567 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 320 transitions, 5176 flow, removed 41 selfloop flow, removed 3 redundant places. [2024-05-12 12:39:30,571 INFO L231 Difference]: Finished difference. Result has 194 places, 290 transitions, 4612 flow [2024-05-12 12:39:30,571 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4062, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=168, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4612, PETRI_PLACES=194, PETRI_TRANSITIONS=290} [2024-05-12 12:39:30,571 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 144 predicate places. [2024-05-12 12:39:30,572 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 290 transitions, 4612 flow [2024-05-12 12:39:30,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:39:30,572 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:39:30,572 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:39:30,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-05-12 12:39:30,572 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:39:30,572 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:39:30,572 INFO L85 PathProgramCache]: Analyzing trace with hash -1484188328, now seen corresponding path program 2 times [2024-05-12 12:39:30,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:39:30,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515477481] [2024-05-12 12:39:30,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:39:30,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:39:30,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:39:30,692 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:39:30,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:39:30,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515477481] [2024-05-12 12:39:30,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515477481] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:39:30,693 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:39:30,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:39:30,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506048481] [2024-05-12 12:39:30,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:39:30,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 12:39:30,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:39:30,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 12:39:30,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-05-12 12:39:30,726 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 12:39:30,726 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 290 transitions, 4612 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:39:30,726 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:39:30,726 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 12:39:30,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:39:31,417 INFO L124 PetriNetUnfolderBase]: 3294/5428 cut-off events. [2024-05-12 12:39:31,417 INFO L125 PetriNetUnfolderBase]: For 139886/139886 co-relation queries the response was YES. [2024-05-12 12:39:31,448 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34147 conditions, 5428 events. 3294/5428 cut-off events. For 139886/139886 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 36238 event pairs, 933 based on Foata normal form. 2/5410 useless extension candidates. Maximal degree in co-relation 34057. Up to 4679 conditions per place. [2024-05-12 12:39:31,470 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 272 selfloop transitions, 50 changer transitions 0/334 dead transitions. [2024-05-12 12:39:31,470 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 334 transitions, 5814 flow [2024-05-12 12:39:31,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 12:39:31,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 12:39:31,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 212 transitions. [2024-05-12 12:39:31,471 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5760869565217391 [2024-05-12 12:39:31,471 INFO L175 Difference]: Start difference. First operand has 194 places, 290 transitions, 4612 flow. Second operand 8 states and 212 transitions. [2024-05-12 12:39:31,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 334 transitions, 5814 flow [2024-05-12 12:39:31,798 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 334 transitions, 5579 flow, removed 66 selfloop flow, removed 2 redundant places. [2024-05-12 12:39:31,803 INFO L231 Difference]: Finished difference. Result has 201 places, 304 transitions, 4842 flow [2024-05-12 12:39:31,803 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4415, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=290, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=243, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4842, PETRI_PLACES=201, PETRI_TRANSITIONS=304} [2024-05-12 12:39:31,803 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 151 predicate places. [2024-05-12 12:39:31,803 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 304 transitions, 4842 flow [2024-05-12 12:39:31,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:39:31,804 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:39:31,804 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:39:31,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-05-12 12:39:31,804 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:39:31,804 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:39:31,804 INFO L85 PathProgramCache]: Analyzing trace with hash -859326656, now seen corresponding path program 3 times [2024-05-12 12:39:31,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:39:31,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876184282] [2024-05-12 12:39:31,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:39:31,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:39:31,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:39:31,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:39:31,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:39:31,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876184282] [2024-05-12 12:39:31,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876184282] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:39:31,912 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:39:31,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:39:31,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882648669] [2024-05-12 12:39:31,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:39:31,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 12:39:31,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:39:31,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 12:39:31,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-05-12 12:39:31,944 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 12:39:31,945 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 304 transitions, 4842 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:39:31,945 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:39:31,945 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 12:39:31,945 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:39:32,728 INFO L124 PetriNetUnfolderBase]: 3313/5481 cut-off events. [2024-05-12 12:39:32,728 INFO L125 PetriNetUnfolderBase]: For 143383/143383 co-relation queries the response was YES. [2024-05-12 12:39:32,757 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33927 conditions, 5481 events. 3313/5481 cut-off events. For 143383/143383 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 36767 event pairs, 542 based on Foata normal form. 3/5479 useless extension candidates. Maximal degree in co-relation 33834. Up to 4094 conditions per place. [2024-05-12 12:39:32,778 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 193 selfloop transitions, 146 changer transitions 0/351 dead transitions. [2024-05-12 12:39:32,778 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 351 transitions, 5974 flow [2024-05-12 12:39:32,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 12:39:32,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 12:39:32,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 234 transitions. [2024-05-12 12:39:32,779 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6358695652173914 [2024-05-12 12:39:32,779 INFO L175 Difference]: Start difference. First operand has 201 places, 304 transitions, 4842 flow. Second operand 8 states and 234 transitions. [2024-05-12 12:39:32,779 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 351 transitions, 5974 flow [2024-05-12 12:39:33,173 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 351 transitions, 5899 flow, removed 25 selfloop flow, removed 3 redundant places. [2024-05-12 12:39:33,177 INFO L231 Difference]: Finished difference. Result has 206 places, 309 transitions, 5172 flow [2024-05-12 12:39:33,178 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4767, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=304, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5172, PETRI_PLACES=206, PETRI_TRANSITIONS=309} [2024-05-12 12:39:33,178 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 156 predicate places. [2024-05-12 12:39:33,178 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 309 transitions, 5172 flow [2024-05-12 12:39:33,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:39:33,179 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:39:33,179 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:39:33,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-05-12 12:39:33,179 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:39:33,179 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:39:33,179 INFO L85 PathProgramCache]: Analyzing trace with hash -1957827049, now seen corresponding path program 1 times [2024-05-12 12:39:33,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:39:33,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443254459] [2024-05-12 12:39:33,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:39:33,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:39:33,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:39:33,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:39:33,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:39:33,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443254459] [2024-05-12 12:39:33,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443254459] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:39:33,283 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:39:33,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:39:33,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144031988] [2024-05-12 12:39:33,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:39:33,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 12:39:33,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:39:33,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 12:39:33,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-05-12 12:39:33,325 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 12:39:33,325 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 309 transitions, 5172 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:39:33,325 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:39:33,325 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 12:39:33,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:39:34,056 INFO L124 PetriNetUnfolderBase]: 3518/5759 cut-off events. [2024-05-12 12:39:34,056 INFO L125 PetriNetUnfolderBase]: For 173161/173163 co-relation queries the response was YES. [2024-05-12 12:39:34,093 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36441 conditions, 5759 events. 3518/5759 cut-off events. For 173161/173163 co-relation queries the response was YES. Maximal size of possible extension queue 383. Compared 38758 event pairs, 447 based on Foata normal form. 12/5745 useless extension candidates. Maximal degree in co-relation 36346. Up to 4112 conditions per place. [2024-05-12 12:39:34,117 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 247 selfloop transitions, 104 changer transitions 0/363 dead transitions. [2024-05-12 12:39:34,118 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 363 transitions, 6448 flow [2024-05-12 12:39:34,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 12:39:34,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 12:39:34,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 215 transitions. [2024-05-12 12:39:34,118 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6677018633540373 [2024-05-12 12:39:34,118 INFO L175 Difference]: Start difference. First operand has 206 places, 309 transitions, 5172 flow. Second operand 7 states and 215 transitions. [2024-05-12 12:39:34,119 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 363 transitions, 6448 flow [2024-05-12 12:39:34,555 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 363 transitions, 6294 flow, removed 30 selfloop flow, removed 3 redundant places. [2024-05-12 12:39:34,560 INFO L231 Difference]: Finished difference. Result has 210 places, 315 transitions, 5334 flow [2024-05-12 12:39:34,560 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=5026, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=309, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5334, PETRI_PLACES=210, PETRI_TRANSITIONS=315} [2024-05-12 12:39:34,560 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 160 predicate places. [2024-05-12 12:39:34,560 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 315 transitions, 5334 flow [2024-05-12 12:39:34,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:39:34,561 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:39:34,561 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:39:34,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-05-12 12:39:34,561 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:39:34,561 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:39:34,561 INFO L85 PathProgramCache]: Analyzing trace with hash -1126899691, now seen corresponding path program 2 times [2024-05-12 12:39:34,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:39:34,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3810209] [2024-05-12 12:39:34,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:39:34,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:39:34,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:39:34,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:39:34,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:39:34,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3810209] [2024-05-12 12:39:34,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3810209] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:39:34,681 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:39:34,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:39:34,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109798263] [2024-05-12 12:39:34,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:39:34,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 12:39:34,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:39:34,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 12:39:34,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-05-12 12:39:34,713 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 12:39:34,714 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 315 transitions, 5334 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:39:34,714 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:39:34,714 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 12:39:34,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:39:35,506 INFO L124 PetriNetUnfolderBase]: 3618/5860 cut-off events. [2024-05-12 12:39:35,506 INFO L125 PetriNetUnfolderBase]: For 172872/172874 co-relation queries the response was YES. [2024-05-12 12:39:35,649 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37895 conditions, 5860 events. 3618/5860 cut-off events. For 172872/172874 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 39208 event pairs, 641 based on Foata normal form. 12/5850 useless extension candidates. Maximal degree in co-relation 37798. Up to 4654 conditions per place. [2024-05-12 12:39:35,671 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 247 selfloop transitions, 99 changer transitions 0/358 dead transitions. [2024-05-12 12:39:35,671 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 358 transitions, 6444 flow [2024-05-12 12:39:35,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 12:39:35,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 12:39:35,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 208 transitions. [2024-05-12 12:39:35,672 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6459627329192547 [2024-05-12 12:39:35,672 INFO L175 Difference]: Start difference. First operand has 210 places, 315 transitions, 5334 flow. Second operand 7 states and 208 transitions. [2024-05-12 12:39:35,672 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 358 transitions, 6444 flow [2024-05-12 12:39:36,201 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 358 transitions, 6268 flow, removed 22 selfloop flow, removed 3 redundant places. [2024-05-12 12:39:36,206 INFO L231 Difference]: Finished difference. Result has 214 places, 318 transitions, 5419 flow [2024-05-12 12:39:36,206 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=5166, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=315, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5419, PETRI_PLACES=214, PETRI_TRANSITIONS=318} [2024-05-12 12:39:36,206 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 164 predicate places. [2024-05-12 12:39:36,206 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 318 transitions, 5419 flow [2024-05-12 12:39:36,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:39:36,206 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:39:36,206 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:39:36,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-05-12 12:39:36,207 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:39:36,207 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:39:36,207 INFO L85 PathProgramCache]: Analyzing trace with hash -1017020563, now seen corresponding path program 1 times [2024-05-12 12:39:36,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:39:36,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998754226] [2024-05-12 12:39:36,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:39:36,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:39:36,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:39:36,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:39:36,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:39:36,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998754226] [2024-05-12 12:39:36,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998754226] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:39:36,304 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:39:36,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:39:36,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353785456] [2024-05-12 12:39:36,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:39:36,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 12:39:36,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:39:36,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 12:39:36,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-05-12 12:39:36,337 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 12:39:36,337 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 318 transitions, 5419 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:39:36,337 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:39:36,337 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 12:39:36,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:39:37,120 INFO L124 PetriNetUnfolderBase]: 3668/5956 cut-off events. [2024-05-12 12:39:37,120 INFO L125 PetriNetUnfolderBase]: For 172174/172176 co-relation queries the response was YES. [2024-05-12 12:39:37,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39045 conditions, 5956 events. 3668/5956 cut-off events. For 172174/172176 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 40025 event pairs, 709 based on Foata normal form. 2/5924 useless extension candidates. Maximal degree in co-relation 38946. Up to 4138 conditions per place. [2024-05-12 12:39:37,193 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 158 selfloop transitions, 191 changer transitions 0/361 dead transitions. [2024-05-12 12:39:37,193 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 361 transitions, 6658 flow [2024-05-12 12:39:37,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 12:39:37,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 12:39:37,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 203 transitions. [2024-05-12 12:39:37,194 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6304347826086957 [2024-05-12 12:39:37,194 INFO L175 Difference]: Start difference. First operand has 214 places, 318 transitions, 5419 flow. Second operand 7 states and 203 transitions. [2024-05-12 12:39:37,195 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 361 transitions, 6658 flow [2024-05-12 12:39:37,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 361 transitions, 6475 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-05-12 12:39:37,740 INFO L231 Difference]: Finished difference. Result has 218 places, 328 transitions, 5862 flow [2024-05-12 12:39:37,740 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=5236, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=318, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=182, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5862, PETRI_PLACES=218, PETRI_TRANSITIONS=328} [2024-05-12 12:39:37,741 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 168 predicate places. [2024-05-12 12:39:37,741 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 328 transitions, 5862 flow [2024-05-12 12:39:37,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:39:37,741 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:39:37,741 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:39:37,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-05-12 12:39:37,742 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:39:37,742 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:39:37,742 INFO L85 PathProgramCache]: Analyzing trace with hash 216382429, now seen corresponding path program 1 times [2024-05-12 12:39:37,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:39:37,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432644179] [2024-05-12 12:39:37,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:39:37,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:39:37,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:39:37,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:39:37,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:39:37,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432644179] [2024-05-12 12:39:37,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432644179] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:39:37,838 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:39:37,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:39:37,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261338544] [2024-05-12 12:39:37,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:39:37,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 12:39:37,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:39:37,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 12:39:37,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-05-12 12:39:37,874 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 12:39:37,875 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 328 transitions, 5862 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:39:37,875 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:39:37,875 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 12:39:37,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:39:38,704 INFO L124 PetriNetUnfolderBase]: 3690/5986 cut-off events. [2024-05-12 12:39:38,704 INFO L125 PetriNetUnfolderBase]: For 182121/182123 co-relation queries the response was YES. [2024-05-12 12:39:38,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40139 conditions, 5986 events. 3690/5986 cut-off events. For 182121/182123 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 40213 event pairs, 637 based on Foata normal form. 2/5966 useless extension candidates. Maximal degree in co-relation 40038. Up to 4842 conditions per place. [2024-05-12 12:39:38,762 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 257 selfloop transitions, 95 changer transitions 0/364 dead transitions. [2024-05-12 12:39:38,762 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 364 transitions, 6896 flow [2024-05-12 12:39:38,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 12:39:38,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 12:39:38,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 199 transitions. [2024-05-12 12:39:38,763 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6180124223602484 [2024-05-12 12:39:38,763 INFO L175 Difference]: Start difference. First operand has 218 places, 328 transitions, 5862 flow. Second operand 7 states and 199 transitions. [2024-05-12 12:39:38,763 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 364 transitions, 6896 flow [2024-05-12 12:39:39,278 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 364 transitions, 6639 flow, removed 16 selfloop flow, removed 3 redundant places. [2024-05-12 12:39:39,283 INFO L231 Difference]: Finished difference. Result has 222 places, 332 transitions, 5876 flow [2024-05-12 12:39:39,283 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=5609, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=328, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5876, PETRI_PLACES=222, PETRI_TRANSITIONS=332} [2024-05-12 12:39:39,284 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 172 predicate places. [2024-05-12 12:39:39,284 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 332 transitions, 5876 flow [2024-05-12 12:39:39,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:39:39,284 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:39:39,284 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:39:39,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-05-12 12:39:39,284 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:39:39,284 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:39:39,284 INFO L85 PathProgramCache]: Analyzing trace with hash -839651893, now seen corresponding path program 2 times [2024-05-12 12:39:39,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:39:39,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818360817] [2024-05-12 12:39:39,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:39:39,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:39:39,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:39:39,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:39:39,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:39:39,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818360817] [2024-05-12 12:39:39,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818360817] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:39:39,376 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:39:39,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:39:39,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229362071] [2024-05-12 12:39:39,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:39:39,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 12:39:39,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:39:39,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 12:39:39,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-05-12 12:39:39,409 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 12:39:39,409 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 332 transitions, 5876 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:39:39,409 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:39:39,409 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 12:39:39,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:39:40,158 INFO L124 PetriNetUnfolderBase]: 3712/6031 cut-off events. [2024-05-12 12:39:40,158 INFO L125 PetriNetUnfolderBase]: For 188523/188525 co-relation queries the response was YES. [2024-05-12 12:39:40,199 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40030 conditions, 6031 events. 3712/6031 cut-off events. For 188523/188525 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 40641 event pairs, 714 based on Foata normal form. 2/5995 useless extension candidates. Maximal degree in co-relation 39928. Up to 4162 conditions per place. [2024-05-12 12:39:40,223 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 169 selfloop transitions, 185 changer transitions 0/366 dead transitions. [2024-05-12 12:39:40,224 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 366 transitions, 7008 flow [2024-05-12 12:39:40,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 12:39:40,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 12:39:40,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 202 transitions. [2024-05-12 12:39:40,224 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6273291925465838 [2024-05-12 12:39:40,225 INFO L175 Difference]: Start difference. First operand has 222 places, 332 transitions, 5876 flow. Second operand 7 states and 202 transitions. [2024-05-12 12:39:40,225 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 366 transitions, 7008 flow [2024-05-12 12:39:40,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 366 transitions, 6815 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-05-12 12:39:40,760 INFO L231 Difference]: Finished difference. Result has 225 places, 336 transitions, 6139 flow [2024-05-12 12:39:40,760 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=5683, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=332, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=181, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6139, PETRI_PLACES=225, PETRI_TRANSITIONS=336} [2024-05-12 12:39:40,761 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 175 predicate places. [2024-05-12 12:39:40,761 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 336 transitions, 6139 flow [2024-05-12 12:39:40,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:39:40,761 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:39:40,761 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:39:40,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-05-12 12:39:40,761 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:39:40,762 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:39:40,762 INFO L85 PathProgramCache]: Analyzing trace with hash 1412492253, now seen corresponding path program 2 times [2024-05-12 12:39:40,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:39:40,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285400367] [2024-05-12 12:39:40,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:39:40,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:39:40,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:39:40,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:39:40,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:39:40,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285400367] [2024-05-12 12:39:40,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285400367] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:39:40,856 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:39:40,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:39:40,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899763906] [2024-05-12 12:39:40,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:39:40,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 12:39:40,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:39:40,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 12:39:40,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-05-12 12:39:40,879 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 12:39:40,879 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 336 transitions, 6139 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:39:40,879 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:39:40,879 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 12:39:40,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:39:41,827 INFO L124 PetriNetUnfolderBase]: 3734/6043 cut-off events. [2024-05-12 12:39:41,827 INFO L125 PetriNetUnfolderBase]: For 196930/196932 co-relation queries the response was YES. [2024-05-12 12:39:41,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41012 conditions, 6043 events. 3734/6043 cut-off events. For 196930/196932 co-relation queries the response was YES. Maximal size of possible extension queue 398. Compared 40704 event pairs, 632 based on Foata normal form. 2/6025 useless extension candidates. Maximal degree in co-relation 40909. Up to 4892 conditions per place. [2024-05-12 12:39:41,902 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 267 selfloop transitions, 96 changer transitions 0/375 dead transitions. [2024-05-12 12:39:41,902 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 375 transitions, 7331 flow [2024-05-12 12:39:41,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 12:39:41,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 12:39:41,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 221 transitions. [2024-05-12 12:39:41,903 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6005434782608695 [2024-05-12 12:39:41,903 INFO L175 Difference]: Start difference. First operand has 225 places, 336 transitions, 6139 flow. Second operand 8 states and 221 transitions. [2024-05-12 12:39:41,903 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 375 transitions, 7331 flow [2024-05-12 12:39:42,697 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 375 transitions, 6970 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-05-12 12:39:42,702 INFO L231 Difference]: Finished difference. Result has 229 places, 342 transitions, 6083 flow [2024-05-12 12:39:42,703 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=5784, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=336, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6083, PETRI_PLACES=229, PETRI_TRANSITIONS=342} [2024-05-12 12:39:42,703 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 179 predicate places. [2024-05-12 12:39:42,704 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 342 transitions, 6083 flow [2024-05-12 12:39:42,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:39:42,704 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:39:42,704 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:39:42,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-05-12 12:39:42,705 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:39:42,705 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:39:42,705 INFO L85 PathProgramCache]: Analyzing trace with hash -839889043, now seen corresponding path program 3 times [2024-05-12 12:39:42,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:39:42,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21491327] [2024-05-12 12:39:42,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:39:42,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:39:42,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:39:42,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:39:42,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:39:42,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21491327] [2024-05-12 12:39:42,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21491327] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:39:42,821 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:39:42,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:39:42,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703597114] [2024-05-12 12:39:42,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:39:42,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 12:39:42,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:39:42,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 12:39:42,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-05-12 12:39:42,855 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 12:39:42,855 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 342 transitions, 6083 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:39:42,855 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:39:42,855 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 12:39:42,855 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:39:43,715 INFO L124 PetriNetUnfolderBase]: 3728/6137 cut-off events. [2024-05-12 12:39:43,715 INFO L125 PetriNetUnfolderBase]: For 203569/203571 co-relation queries the response was YES. [2024-05-12 12:39:43,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40486 conditions, 6137 events. 3728/6137 cut-off events. For 203569/203571 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 42003 event pairs, 730 based on Foata normal form. 2/6086 useless extension candidates. Maximal degree in co-relation 40382. Up to 4171 conditions per place. [2024-05-12 12:39:43,787 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 172 selfloop transitions, 188 changer transitions 0/372 dead transitions. [2024-05-12 12:39:43,788 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 372 transitions, 7165 flow [2024-05-12 12:39:43,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 12:39:43,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 12:39:43,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 202 transitions. [2024-05-12 12:39:43,788 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6273291925465838 [2024-05-12 12:39:43,789 INFO L175 Difference]: Start difference. First operand has 229 places, 342 transitions, 6083 flow. Second operand 7 states and 202 transitions. [2024-05-12 12:39:43,789 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 372 transitions, 7165 flow [2024-05-12 12:39:44,435 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 372 transitions, 6986 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-05-12 12:39:44,440 INFO L231 Difference]: Finished difference. Result has 232 places, 342 transitions, 6287 flow [2024-05-12 12:39:44,440 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=5904, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=342, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=188, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6287, PETRI_PLACES=232, PETRI_TRANSITIONS=342} [2024-05-12 12:39:44,440 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 182 predicate places. [2024-05-12 12:39:44,440 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 342 transitions, 6287 flow [2024-05-12 12:39:44,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:39:44,441 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:39:44,441 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:39:44,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-05-12 12:39:44,441 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:39:44,441 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:39:44,441 INFO L85 PathProgramCache]: Analyzing trace with hash -1662368839, now seen corresponding path program 3 times [2024-05-12 12:39:44,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:39:44,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949638241] [2024-05-12 12:39:44,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:39:44,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:39:44,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:39:44,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:39:44,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:39:44,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949638241] [2024-05-12 12:39:44,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949638241] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:39:44,542 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:39:44,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:39:44,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751374071] [2024-05-12 12:39:44,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:39:44,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 12:39:44,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:39:44,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 12:39:44,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-05-12 12:39:44,579 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 12:39:44,579 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 342 transitions, 6287 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:39:44,579 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:39:44,579 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 12:39:44,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:39:45,464 INFO L124 PetriNetUnfolderBase]: 3828/6238 cut-off events. [2024-05-12 12:39:45,464 INFO L125 PetriNetUnfolderBase]: For 225710/225712 co-relation queries the response was YES. [2024-05-12 12:39:45,516 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41769 conditions, 6238 events. 3828/6238 cut-off events. For 225710/225712 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 42510 event pairs, 649 based on Foata normal form. 12/6217 useless extension candidates. Maximal degree in co-relation 41663. Up to 4932 conditions per place. [2024-05-12 12:39:45,545 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 267 selfloop transitions, 99 changer transitions 0/378 dead transitions. [2024-05-12 12:39:45,545 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 378 transitions, 7353 flow [2024-05-12 12:39:45,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 12:39:45,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 12:39:45,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 201 transitions. [2024-05-12 12:39:45,546 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6242236024844721 [2024-05-12 12:39:45,546 INFO L175 Difference]: Start difference. First operand has 232 places, 342 transitions, 6287 flow. Second operand 7 states and 201 transitions. [2024-05-12 12:39:45,546 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 378 transitions, 7353 flow [2024-05-12 12:39:46,297 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 378 transitions, 6997 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-05-12 12:39:46,302 INFO L231 Difference]: Finished difference. Result has 235 places, 345 transitions, 6190 flow [2024-05-12 12:39:46,302 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=5931, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=342, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=243, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6190, PETRI_PLACES=235, PETRI_TRANSITIONS=345} [2024-05-12 12:39:46,303 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 185 predicate places. [2024-05-12 12:39:46,303 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 345 transitions, 6190 flow [2024-05-12 12:39:46,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:39:46,303 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:39:46,303 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:39:46,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-05-12 12:39:46,303 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:39:46,303 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:39:46,303 INFO L85 PathProgramCache]: Analyzing trace with hash -1661999443, now seen corresponding path program 1 times [2024-05-12 12:39:46,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:39:46,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426547539] [2024-05-12 12:39:46,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:39:46,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:39:46,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:39:46,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:39:46,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:39:46,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426547539] [2024-05-12 12:39:46,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426547539] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:39:46,407 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:39:46,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:39:46,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801912248] [2024-05-12 12:39:46,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:39:46,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 12:39:46,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:39:46,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 12:39:46,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-05-12 12:39:46,439 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 12:39:46,439 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 345 transitions, 6190 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:39:46,439 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:39:46,439 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 12:39:46,440 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:39:47,297 INFO L124 PetriNetUnfolderBase]: 3846/6255 cut-off events. [2024-05-12 12:39:47,297 INFO L125 PetriNetUnfolderBase]: For 213353/213353 co-relation queries the response was YES. [2024-05-12 12:39:47,350 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41706 conditions, 6255 events. 3846/6255 cut-off events. For 213353/213353 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 42423 event pairs, 757 based on Foata normal form. 2/6247 useless extension candidates. Maximal degree in co-relation 41599. Up to 5560 conditions per place. [2024-05-12 12:39:47,380 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 336 selfloop transitions, 27 changer transitions 0/375 dead transitions. [2024-05-12 12:39:47,380 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 375 transitions, 7028 flow [2024-05-12 12:39:47,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 12:39:47,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 12:39:47,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 185 transitions. [2024-05-12 12:39:47,381 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5745341614906833 [2024-05-12 12:39:47,381 INFO L175 Difference]: Start difference. First operand has 235 places, 345 transitions, 6190 flow. Second operand 7 states and 185 transitions. [2024-05-12 12:39:47,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 375 transitions, 7028 flow [2024-05-12 12:39:48,101 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 375 transitions, 6809 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-05-12 12:39:48,106 INFO L231 Difference]: Finished difference. Result has 237 places, 347 transitions, 6082 flow [2024-05-12 12:39:48,106 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=5971, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=345, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=318, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6082, PETRI_PLACES=237, PETRI_TRANSITIONS=347} [2024-05-12 12:39:48,106 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 187 predicate places. [2024-05-12 12:39:48,106 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 347 transitions, 6082 flow [2024-05-12 12:39:48,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:39:48,107 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:39:48,107 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:39:48,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-05-12 12:39:48,107 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:39:48,107 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:39:48,107 INFO L85 PathProgramCache]: Analyzing trace with hash -1501458701, now seen corresponding path program 3 times [2024-05-12 12:39:48,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:39:48,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783326782] [2024-05-12 12:39:48,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:39:48,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:39:48,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:39:48,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:39:48,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:39:48,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783326782] [2024-05-12 12:39:48,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783326782] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:39:48,214 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:39:48,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:39:48,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929994303] [2024-05-12 12:39:48,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:39:48,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 12:39:48,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:39:48,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 12:39:48,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-05-12 12:39:48,249 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 12:39:48,249 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 347 transitions, 6082 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:39:48,249 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:39:48,249 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 12:39:48,249 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:39:49,127 INFO L124 PetriNetUnfolderBase]: 3843/6256 cut-off events. [2024-05-12 12:39:49,127 INFO L125 PetriNetUnfolderBase]: For 220442/220454 co-relation queries the response was YES. [2024-05-12 12:39:49,171 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41165 conditions, 6256 events. 3843/6256 cut-off events. For 220442/220454 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 42528 event pairs, 653 based on Foata normal form. 4/6222 useless extension candidates. Maximal degree in co-relation 41057. Up to 5056 conditions per place. [2024-05-12 12:39:49,197 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 257 selfloop transitions, 107 changer transitions 0/376 dead transitions. [2024-05-12 12:39:49,197 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 376 transitions, 7084 flow [2024-05-12 12:39:49,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 12:39:49,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 12:39:49,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 197 transitions. [2024-05-12 12:39:49,198 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6118012422360248 [2024-05-12 12:39:49,198 INFO L175 Difference]: Start difference. First operand has 237 places, 347 transitions, 6082 flow. Second operand 7 states and 197 transitions. [2024-05-12 12:39:49,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 376 transitions, 7084 flow [2024-05-12 12:39:49,785 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 376 transitions, 6979 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-05-12 12:39:49,791 INFO L231 Difference]: Finished difference. Result has 239 places, 347 transitions, 6197 flow [2024-05-12 12:39:49,791 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=5977, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6197, PETRI_PLACES=239, PETRI_TRANSITIONS=347} [2024-05-12 12:39:49,791 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 189 predicate places. [2024-05-12 12:39:49,791 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 347 transitions, 6197 flow [2024-05-12 12:39:49,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:39:49,792 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:39:49,792 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:39:49,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-05-12 12:39:49,792 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:39:49,792 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:39:49,793 INFO L85 PathProgramCache]: Analyzing trace with hash 880288949, now seen corresponding path program 4 times [2024-05-12 12:39:49,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:39:49,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216574085] [2024-05-12 12:39:49,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:39:49,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:39:49,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:39:49,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:39:49,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:39:49,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216574085] [2024-05-12 12:39:49,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216574085] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:39:49,895 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:39:49,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:39:49,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075815101] [2024-05-12 12:39:49,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:39:49,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 12:39:49,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:39:49,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 12:39:49,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-05-12 12:39:49,932 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 12:39:49,932 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 347 transitions, 6197 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:39:49,932 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:39:49,933 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 12:39:49,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:39:50,773 INFO L124 PetriNetUnfolderBase]: 3840/6255 cut-off events. [2024-05-12 12:39:50,773 INFO L125 PetriNetUnfolderBase]: For 227033/227045 co-relation queries the response was YES. [2024-05-12 12:39:50,823 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41597 conditions, 6255 events. 3840/6255 cut-off events. For 227033/227045 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 42694 event pairs, 668 based on Foata normal form. 4/6216 useless extension candidates. Maximal degree in co-relation 41488. Up to 5054 conditions per place. [2024-05-12 12:39:50,853 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 260 selfloop transitions, 103 changer transitions 0/375 dead transitions. [2024-05-12 12:39:50,854 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 375 transitions, 7093 flow [2024-05-12 12:39:50,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 12:39:50,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 12:39:50,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 194 transitions. [2024-05-12 12:39:50,855 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6024844720496895 [2024-05-12 12:39:50,855 INFO L175 Difference]: Start difference. First operand has 239 places, 347 transitions, 6197 flow. Second operand 7 states and 194 transitions. [2024-05-12 12:39:50,855 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 375 transitions, 7093 flow [2024-05-12 12:39:51,617 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 375 transitions, 6833 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-05-12 12:39:51,622 INFO L231 Difference]: Finished difference. Result has 241 places, 347 transitions, 6151 flow [2024-05-12 12:39:51,623 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=5939, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6151, PETRI_PLACES=241, PETRI_TRANSITIONS=347} [2024-05-12 12:39:51,623 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 191 predicate places. [2024-05-12 12:39:51,623 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 347 transitions, 6151 flow [2024-05-12 12:39:51,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:39:51,623 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:39:51,623 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:39:51,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-05-12 12:39:51,623 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:39:51,623 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:39:51,624 INFO L85 PathProgramCache]: Analyzing trace with hash 880289135, now seen corresponding path program 4 times [2024-05-12 12:39:51,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:39:51,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330076813] [2024-05-12 12:39:51,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:39:51,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:39:51,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:39:51,730 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:39:51,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:39:51,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330076813] [2024-05-12 12:39:51,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330076813] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:39:51,731 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:39:51,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:39:51,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346455520] [2024-05-12 12:39:51,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:39:51,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 12:39:51,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:39:51,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 12:39:51,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-05-12 12:39:51,775 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 12:39:51,775 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 347 transitions, 6151 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:39:51,776 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:39:51,776 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 12:39:51,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:39:52,636 INFO L124 PetriNetUnfolderBase]: 3830/6248 cut-off events. [2024-05-12 12:39:52,636 INFO L125 PetriNetUnfolderBase]: For 224077/224089 co-relation queries the response was YES. [2024-05-12 12:39:52,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41206 conditions, 6248 events. 3830/6248 cut-off events. For 224077/224089 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 42575 event pairs, 733 based on Foata normal form. 5/6202 useless extension candidates. Maximal degree in co-relation 41096. Up to 4335 conditions per place. [2024-05-12 12:39:52,709 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 156 selfloop transitions, 209 changer transitions 0/377 dead transitions. [2024-05-12 12:39:52,709 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 377 transitions, 7267 flow [2024-05-12 12:39:52,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 12:39:52,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 12:39:52,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 200 transitions. [2024-05-12 12:39:52,710 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6211180124223602 [2024-05-12 12:39:52,710 INFO L175 Difference]: Start difference. First operand has 241 places, 347 transitions, 6151 flow. Second operand 7 states and 200 transitions. [2024-05-12 12:39:52,710 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 377 transitions, 7267 flow [2024-05-12 12:39:53,353 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 377 transitions, 7047 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-05-12 12:39:53,358 INFO L231 Difference]: Finished difference. Result has 244 places, 347 transitions, 6356 flow [2024-05-12 12:39:53,359 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=5931, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=209, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6356, PETRI_PLACES=244, PETRI_TRANSITIONS=347} [2024-05-12 12:39:53,359 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 194 predicate places. [2024-05-12 12:39:53,359 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 347 transitions, 6356 flow [2024-05-12 12:39:53,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:39:53,359 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:39:53,359 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:39:53,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-05-12 12:39:53,360 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:39:53,360 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:39:53,360 INFO L85 PathProgramCache]: Analyzing trace with hash 1234552175, now seen corresponding path program 5 times [2024-05-12 12:39:53,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:39:53,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721197933] [2024-05-12 12:39:53,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:39:53,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:39:53,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:39:53,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:39:53,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:39:53,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721197933] [2024-05-12 12:39:53,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721197933] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:39:53,475 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:39:53,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:39:53,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649384804] [2024-05-12 12:39:53,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:39:53,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 12:39:53,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:39:53,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 12:39:53,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-05-12 12:39:53,521 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 12:39:53,521 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 347 transitions, 6356 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:39:53,521 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:39:53,522 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 12:39:53,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:39:54,380 INFO L124 PetriNetUnfolderBase]: 3824/6268 cut-off events. [2024-05-12 12:39:54,380 INFO L125 PetriNetUnfolderBase]: For 226614/226614 co-relation queries the response was YES. [2024-05-12 12:39:54,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41736 conditions, 6268 events. 3824/6268 cut-off events. For 226614/226614 co-relation queries the response was YES. Maximal size of possible extension queue 407. Compared 42744 event pairs, 1175 based on Foata normal form. 2/6227 useless extension candidates. Maximal degree in co-relation 41625. Up to 5453 conditions per place. [2024-05-12 12:39:54,448 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 315 selfloop transitions, 50 changer transitions 0/377 dead transitions. [2024-05-12 12:39:54,448 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 377 transitions, 7377 flow [2024-05-12 12:39:54,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 12:39:54,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 12:39:54,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 212 transitions. [2024-05-12 12:39:54,449 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5760869565217391 [2024-05-12 12:39:54,449 INFO L175 Difference]: Start difference. First operand has 244 places, 347 transitions, 6356 flow. Second operand 8 states and 212 transitions. [2024-05-12 12:39:54,449 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 377 transitions, 7377 flow [2024-05-12 12:39:55,206 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 377 transitions, 6443 flow, removed 3 selfloop flow, removed 13 redundant places. [2024-05-12 12:39:55,211 INFO L231 Difference]: Finished difference. Result has 239 places, 347 transitions, 5529 flow [2024-05-12 12:39:55,211 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=5422, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5529, PETRI_PLACES=239, PETRI_TRANSITIONS=347} [2024-05-12 12:39:55,211 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 189 predicate places. [2024-05-12 12:39:55,211 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 347 transitions, 5529 flow [2024-05-12 12:39:55,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:39:55,212 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:39:55,212 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:39:55,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-05-12 12:39:55,212 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:39:55,212 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:39:55,212 INFO L85 PathProgramCache]: Analyzing trace with hash -580920437, now seen corresponding path program 6 times [2024-05-12 12:39:55,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:39:55,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710835001] [2024-05-12 12:39:55,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:39:55,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:39:55,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:39:55,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:39:55,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:39:55,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710835001] [2024-05-12 12:39:55,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710835001] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:39:55,305 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:39:55,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:39:55,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173009374] [2024-05-12 12:39:55,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:39:55,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 12:39:55,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:39:55,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 12:39:55,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-05-12 12:39:55,329 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 12:39:55,329 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 347 transitions, 5529 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:39:55,329 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:39:55,329 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 12:39:55,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:39:56,223 INFO L124 PetriNetUnfolderBase]: 3846/6262 cut-off events. [2024-05-12 12:39:56,224 INFO L125 PetriNetUnfolderBase]: For 218960/218962 co-relation queries the response was YES. [2024-05-12 12:39:56,271 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40220 conditions, 6262 events. 3846/6262 cut-off events. For 218960/218962 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 42534 event pairs, 620 based on Foata normal form. 4/6240 useless extension candidates. Maximal degree in co-relation 40110. Up to 4842 conditions per place. [2024-05-12 12:39:56,298 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 242 selfloop transitions, 130 changer transitions 0/384 dead transitions. [2024-05-12 12:39:56,298 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 384 transitions, 6754 flow [2024-05-12 12:39:56,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 12:39:56,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 12:39:56,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 203 transitions. [2024-05-12 12:39:56,299 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6304347826086957 [2024-05-12 12:39:56,299 INFO L175 Difference]: Start difference. First operand has 239 places, 347 transitions, 5529 flow. Second operand 7 states and 203 transitions. [2024-05-12 12:39:56,299 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 384 transitions, 6754 flow [2024-05-12 12:39:56,970 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 384 transitions, 6636 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-05-12 12:39:56,975 INFO L231 Difference]: Finished difference. Result has 241 places, 351 transitions, 5757 flow [2024-05-12 12:39:56,976 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=5411, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5757, PETRI_PLACES=241, PETRI_TRANSITIONS=351} [2024-05-12 12:39:56,976 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 191 predicate places. [2024-05-12 12:39:56,976 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 351 transitions, 5757 flow [2024-05-12 12:39:56,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:39:56,976 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:39:56,976 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:39:56,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-05-12 12:39:56,977 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:39:56,977 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:39:56,977 INFO L85 PathProgramCache]: Analyzing trace with hash -869572473, now seen corresponding path program 7 times [2024-05-12 12:39:56,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:39:56,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877426871] [2024-05-12 12:39:56,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:39:56,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:39:56,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:39:57,074 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:39:57,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:39:57,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877426871] [2024-05-12 12:39:57,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877426871] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:39:57,075 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:39:57,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:39:57,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096569765] [2024-05-12 12:39:57,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:39:57,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 12:39:57,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:39:57,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 12:39:57,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-05-12 12:39:57,099 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 12:39:57,100 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 351 transitions, 5757 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:39:57,100 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:39:57,100 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 12:39:57,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:39:58,086 INFO L124 PetriNetUnfolderBase]: 3838/6175 cut-off events. [2024-05-12 12:39:58,087 INFO L125 PetriNetUnfolderBase]: For 219842/219842 co-relation queries the response was YES. [2024-05-12 12:39:58,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40583 conditions, 6175 events. 3838/6175 cut-off events. For 219842/219842 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 41383 event pairs, 570 based on Foata normal form. 2/6173 useless extension candidates. Maximal degree in co-relation 40472. Up to 4836 conditions per place. [2024-05-12 12:39:58,150 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 233 selfloop transitions, 148 changer transitions 0/393 dead transitions. [2024-05-12 12:39:58,151 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 393 transitions, 6953 flow [2024-05-12 12:39:58,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 12:39:58,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 12:39:58,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 233 transitions. [2024-05-12 12:39:58,152 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6331521739130435 [2024-05-12 12:39:58,152 INFO L175 Difference]: Start difference. First operand has 241 places, 351 transitions, 5757 flow. Second operand 8 states and 233 transitions. [2024-05-12 12:39:58,152 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 393 transitions, 6953 flow [2024-05-12 12:39:58,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 393 transitions, 6703 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-05-12 12:39:58,883 INFO L231 Difference]: Finished difference. Result has 245 places, 351 transitions, 5815 flow [2024-05-12 12:39:58,883 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=5507, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=351, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5815, PETRI_PLACES=245, PETRI_TRANSITIONS=351} [2024-05-12 12:39:58,884 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 195 predicate places. [2024-05-12 12:39:58,884 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 351 transitions, 5815 flow [2024-05-12 12:39:58,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:39:58,884 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:39:58,884 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:39:58,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-05-12 12:39:58,884 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:39:58,885 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:39:58,885 INFO L85 PathProgramCache]: Analyzing trace with hash 672829005, now seen corresponding path program 8 times [2024-05-12 12:39:58,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:39:58,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662417791] [2024-05-12 12:39:58,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:39:58,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:39:58,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:39:58,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:39:58,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:39:58,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662417791] [2024-05-12 12:39:58,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662417791] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:39:58,979 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:39:58,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:39:58,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050186881] [2024-05-12 12:39:58,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:39:58,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 12:39:58,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:39:58,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 12:39:58,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-05-12 12:39:59,011 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 12:39:59,011 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 351 transitions, 5815 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:39:59,011 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:39:59,011 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 12:39:59,011 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:39:59,844 INFO L124 PetriNetUnfolderBase]: 3830/6175 cut-off events. [2024-05-12 12:39:59,844 INFO L125 PetriNetUnfolderBase]: For 223476/223478 co-relation queries the response was YES. [2024-05-12 12:39:59,888 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40607 conditions, 6175 events. 3830/6175 cut-off events. For 223476/223478 co-relation queries the response was YES. Maximal size of possible extension queue 407. Compared 41506 event pairs, 588 based on Foata normal form. 4/6169 useless extension candidates. Maximal degree in co-relation 40495. Up to 4831 conditions per place. [2024-05-12 12:39:59,912 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 238 selfloop transitions, 136 changer transitions 0/386 dead transitions. [2024-05-12 12:39:59,913 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 386 transitions, 6873 flow [2024-05-12 12:39:59,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 12:39:59,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 12:39:59,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 205 transitions. [2024-05-12 12:39:59,914 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6366459627329193 [2024-05-12 12:39:59,914 INFO L175 Difference]: Start difference. First operand has 245 places, 351 transitions, 5815 flow. Second operand 7 states and 205 transitions. [2024-05-12 12:39:59,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 386 transitions, 6873 flow [2024-05-12 12:40:00,491 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 386 transitions, 6608 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-05-12 12:40:00,495 INFO L231 Difference]: Finished difference. Result has 246 places, 351 transitions, 5833 flow [2024-05-12 12:40:00,496 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=5554, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=351, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5833, PETRI_PLACES=246, PETRI_TRANSITIONS=351} [2024-05-12 12:40:00,496 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 196 predicate places. [2024-05-12 12:40:00,496 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 351 transitions, 5833 flow [2024-05-12 12:40:00,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:40:00,497 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:40:00,497 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:40:00,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-05-12 12:40:00,497 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:40:00,497 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:40:00,497 INFO L85 PathProgramCache]: Analyzing trace with hash 672705687, now seen corresponding path program 4 times [2024-05-12 12:40:00,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:40:00,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864528519] [2024-05-12 12:40:00,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:40:00,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:40:00,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:40:00,605 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:40:00,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:40:00,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864528519] [2024-05-12 12:40:00,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864528519] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:40:00,606 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:40:00,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:40:00,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828963586] [2024-05-12 12:40:00,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:40:00,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 12:40:00,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:40:00,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 12:40:00,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-05-12 12:40:00,661 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 12:40:00,662 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 351 transitions, 5833 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:40:00,662 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:40:00,662 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 12:40:00,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:40:01,753 INFO L124 PetriNetUnfolderBase]: 4190/7109 cut-off events. [2024-05-12 12:40:01,753 INFO L125 PetriNetUnfolderBase]: For 313726/313728 co-relation queries the response was YES. [2024-05-12 12:40:01,798 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42910 conditions, 7109 events. 4190/7109 cut-off events. For 313726/313728 co-relation queries the response was YES. Maximal size of possible extension queue 439. Compared 50520 event pairs, 699 based on Foata normal form. 56/7150 useless extension candidates. Maximal degree in co-relation 42799. Up to 4914 conditions per place. [2024-05-12 12:40:01,830 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 280 selfloop transitions, 108 changer transitions 0/400 dead transitions. [2024-05-12 12:40:01,831 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 400 transitions, 6907 flow [2024-05-12 12:40:01,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 12:40:01,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 12:40:01,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 217 transitions. [2024-05-12 12:40:01,831 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6739130434782609 [2024-05-12 12:40:01,832 INFO L175 Difference]: Start difference. First operand has 246 places, 351 transitions, 5833 flow. Second operand 7 states and 217 transitions. [2024-05-12 12:40:01,832 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 400 transitions, 6907 flow [2024-05-12 12:40:02,380 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 400 transitions, 6393 flow, removed 1 selfloop flow, removed 10 redundant places. [2024-05-12 12:40:02,385 INFO L231 Difference]: Finished difference. Result has 243 places, 354 transitions, 5612 flow [2024-05-12 12:40:02,385 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=5319, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=351, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=243, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5612, PETRI_PLACES=243, PETRI_TRANSITIONS=354} [2024-05-12 12:40:02,386 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 193 predicate places. [2024-05-12 12:40:02,386 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 354 transitions, 5612 flow [2024-05-12 12:40:02,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:40:02,386 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:40:02,386 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:40:02,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-05-12 12:40:02,386 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:40:02,387 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:40:02,387 INFO L85 PathProgramCache]: Analyzing trace with hash -1904737799, now seen corresponding path program 2 times [2024-05-12 12:40:02,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:40:02,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710278339] [2024-05-12 12:40:02,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:40:02,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:40:02,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:40:02,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:40:02,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:40:02,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710278339] [2024-05-12 12:40:02,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710278339] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:40:02,490 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:40:02,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:40:02,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764026985] [2024-05-12 12:40:02,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:40:02,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 12:40:02,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:40:02,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 12:40:02,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-05-12 12:40:02,523 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 12:40:02,523 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 354 transitions, 5612 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:40:02,523 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:40:02,523 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 12:40:02,523 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:40:03,426 INFO L124 PetriNetUnfolderBase]: 4208/6744 cut-off events. [2024-05-12 12:40:03,426 INFO L125 PetriNetUnfolderBase]: For 226863/226863 co-relation queries the response was YES. [2024-05-12 12:40:03,477 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42898 conditions, 6744 events. 4208/6744 cut-off events. For 226863/226863 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 45716 event pairs, 664 based on Foata normal form. 2/6742 useless extension candidates. Maximal degree in co-relation 42786. Up to 6134 conditions per place. [2024-05-12 12:40:03,506 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 347 selfloop transitions, 22 changer transitions 0/381 dead transitions. [2024-05-12 12:40:03,506 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 381 transitions, 6460 flow [2024-05-12 12:40:03,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 12:40:03,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 12:40:03,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 163 transitions. [2024-05-12 12:40:03,507 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5905797101449275 [2024-05-12 12:40:03,507 INFO L175 Difference]: Start difference. First operand has 243 places, 354 transitions, 5612 flow. Second operand 6 states and 163 transitions. [2024-05-12 12:40:03,507 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 381 transitions, 6460 flow [2024-05-12 12:40:04,274 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 381 transitions, 6217 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-05-12 12:40:04,279 INFO L231 Difference]: Finished difference. Result has 244 places, 356 transitions, 5474 flow [2024-05-12 12:40:04,280 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=5371, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=354, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=332, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5474, PETRI_PLACES=244, PETRI_TRANSITIONS=356} [2024-05-12 12:40:04,280 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 194 predicate places. [2024-05-12 12:40:04,280 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 356 transitions, 5474 flow [2024-05-12 12:40:04,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:40:04,280 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:40:04,280 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:40:04,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-05-12 12:40:04,281 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:40:04,281 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:40:04,281 INFO L85 PathProgramCache]: Analyzing trace with hash 684693573, now seen corresponding path program 3 times [2024-05-12 12:40:04,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:40:04,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056125544] [2024-05-12 12:40:04,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:40:04,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:40:04,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:40:04,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:40:04,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:40:04,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056125544] [2024-05-12 12:40:04,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056125544] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:40:04,381 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:40:04,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:40:04,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684785990] [2024-05-12 12:40:04,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:40:04,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 12:40:04,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:40:04,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 12:40:04,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-05-12 12:40:04,410 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 12:40:04,410 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 356 transitions, 5474 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:40:04,410 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:40:04,410 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 12:40:04,411 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:40:05,476 INFO L124 PetriNetUnfolderBase]: 4226/6770 cut-off events. [2024-05-12 12:40:05,476 INFO L125 PetriNetUnfolderBase]: For 222980/222980 co-relation queries the response was YES. [2024-05-12 12:40:05,521 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42088 conditions, 6770 events. 4226/6770 cut-off events. For 222980/222980 co-relation queries the response was YES. Maximal size of possible extension queue 438. Compared 46008 event pairs, 668 based on Foata normal form. 2/6768 useless extension candidates. Maximal degree in co-relation 41975. Up to 6167 conditions per place. [2024-05-12 12:40:05,553 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 349 selfloop transitions, 19 changer transitions 0/380 dead transitions. [2024-05-12 12:40:05,553 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 380 transitions, 6316 flow [2024-05-12 12:40:05,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 12:40:05,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 12:40:05,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 141 transitions. [2024-05-12 12:40:05,554 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6130434782608696 [2024-05-12 12:40:05,554 INFO L175 Difference]: Start difference. First operand has 244 places, 356 transitions, 5474 flow. Second operand 5 states and 141 transitions. [2024-05-12 12:40:05,554 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 380 transitions, 6316 flow [2024-05-12 12:40:06,410 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 380 transitions, 6225 flow, removed 25 selfloop flow, removed 4 redundant places. [2024-05-12 12:40:06,415 INFO L231 Difference]: Finished difference. Result has 245 places, 358 transitions, 5484 flow [2024-05-12 12:40:06,415 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=5383, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=356, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=337, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=5484, PETRI_PLACES=245, PETRI_TRANSITIONS=358} [2024-05-12 12:40:06,415 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 195 predicate places. [2024-05-12 12:40:06,415 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 358 transitions, 5484 flow [2024-05-12 12:40:06,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:40:06,416 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:40:06,416 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:40:06,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-05-12 12:40:06,416 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:40:06,416 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:40:06,417 INFO L85 PathProgramCache]: Analyzing trace with hash 1086857193, now seen corresponding path program 4 times [2024-05-12 12:40:06,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:40:06,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903243926] [2024-05-12 12:40:06,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:40:06,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:40:06,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:40:06,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:40:06,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:40:06,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903243926] [2024-05-12 12:40:06,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903243926] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:40:06,540 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:40:06,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:40:06,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443604979] [2024-05-12 12:40:06,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:40:06,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 12:40:06,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:40:06,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 12:40:06,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-05-12 12:40:06,583 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 12:40:06,583 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 358 transitions, 5484 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:40:06,583 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:40:06,583 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 12:40:06,583 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:40:07,630 INFO L124 PetriNetUnfolderBase]: 4221/6783 cut-off events. [2024-05-12 12:40:07,630 INFO L125 PetriNetUnfolderBase]: For 226120/226120 co-relation queries the response was YES. [2024-05-12 12:40:07,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41906 conditions, 6783 events. 4221/6783 cut-off events. For 226120/226120 co-relation queries the response was YES. Maximal size of possible extension queue 441. Compared 46294 event pairs, 1011 based on Foata normal form. 2/6766 useless extension candidates. Maximal degree in co-relation 41792. Up to 6128 conditions per place. [2024-05-12 12:40:07,714 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 351 selfloop transitions, 23 changer transitions 0/386 dead transitions. [2024-05-12 12:40:07,714 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 386 transitions, 6350 flow [2024-05-12 12:40:07,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 12:40:07,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 12:40:07,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 164 transitions. [2024-05-12 12:40:07,714 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5942028985507246 [2024-05-12 12:40:07,715 INFO L175 Difference]: Start difference. First operand has 245 places, 358 transitions, 5484 flow. Second operand 6 states and 164 transitions. [2024-05-12 12:40:07,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 386 transitions, 6350 flow [2024-05-12 12:40:08,672 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 386 transitions, 6265 flow, removed 25 selfloop flow, removed 3 redundant places. [2024-05-12 12:40:08,676 INFO L231 Difference]: Finished difference. Result has 248 places, 360 transitions, 5512 flow [2024-05-12 12:40:08,677 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=5399, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=358, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=335, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5512, PETRI_PLACES=248, PETRI_TRANSITIONS=360} [2024-05-12 12:40:08,677 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 198 predicate places. [2024-05-12 12:40:08,677 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 360 transitions, 5512 flow [2024-05-12 12:40:08,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:40:08,677 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:40:08,677 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:40:08,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-05-12 12:40:08,677 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:40:08,678 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:40:08,678 INFO L85 PathProgramCache]: Analyzing trace with hash 1116649937, now seen corresponding path program 1 times [2024-05-12 12:40:08,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:40:08,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816031803] [2024-05-12 12:40:08,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:40:08,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:40:08,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:40:08,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:40:08,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:40:08,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816031803] [2024-05-12 12:40:08,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816031803] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:40:08,779 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:40:08,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:40:08,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903198247] [2024-05-12 12:40:08,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:40:08,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 12:40:08,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:40:08,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 12:40:08,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-05-12 12:40:08,808 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 12:40:08,808 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 360 transitions, 5512 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:40:08,808 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:40:08,808 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 12:40:08,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:40:09,855 INFO L124 PetriNetUnfolderBase]: 4426/7158 cut-off events. [2024-05-12 12:40:09,855 INFO L125 PetriNetUnfolderBase]: For 277145/277157 co-relation queries the response was YES. [2024-05-12 12:40:09,910 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43932 conditions, 7158 events. 4426/7158 cut-off events. For 277145/277157 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 49553 event pairs, 660 based on Foata normal form. 15/7135 useless extension candidates. Maximal degree in co-relation 43817. Up to 5452 conditions per place. [2024-05-12 12:40:09,940 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 279 selfloop transitions, 115 changer transitions 0/406 dead transitions. [2024-05-12 12:40:09,940 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 406 transitions, 6754 flow [2024-05-12 12:40:09,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 12:40:09,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 12:40:09,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 207 transitions. [2024-05-12 12:40:09,941 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6428571428571429 [2024-05-12 12:40:09,941 INFO L175 Difference]: Start difference. First operand has 248 places, 360 transitions, 5512 flow. Second operand 7 states and 207 transitions. [2024-05-12 12:40:09,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 406 transitions, 6754 flow [2024-05-12 12:40:10,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 406 transitions, 6657 flow, removed 27 selfloop flow, removed 4 redundant places. [2024-05-12 12:40:10,653 INFO L231 Difference]: Finished difference. Result has 251 places, 366 transitions, 5757 flow [2024-05-12 12:40:10,653 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=5415, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=360, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5757, PETRI_PLACES=251, PETRI_TRANSITIONS=366} [2024-05-12 12:40:10,653 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 201 predicate places. [2024-05-12 12:40:10,653 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 366 transitions, 5757 flow [2024-05-12 12:40:10,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:40:10,653 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:40:10,653 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:40:10,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-05-12 12:40:10,654 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:40:10,654 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:40:10,654 INFO L85 PathProgramCache]: Analyzing trace with hash 1119506897, now seen corresponding path program 2 times [2024-05-12 12:40:10,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:40:10,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144732704] [2024-05-12 12:40:10,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:40:10,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:40:10,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:40:10,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:40:10,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:40:10,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144732704] [2024-05-12 12:40:10,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144732704] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:40:10,751 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:40:10,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:40:10,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025045152] [2024-05-12 12:40:10,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:40:10,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 12:40:10,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:40:10,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 12:40:10,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-05-12 12:40:10,790 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 12:40:10,790 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 366 transitions, 5757 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:40:10,790 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:40:10,790 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 12:40:10,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:40:11,825 INFO L124 PetriNetUnfolderBase]: 4526/7308 cut-off events. [2024-05-12 12:40:11,826 INFO L125 PetriNetUnfolderBase]: For 289672/289684 co-relation queries the response was YES. [2024-05-12 12:40:11,891 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45559 conditions, 7308 events. 4526/7308 cut-off events. For 289672/289684 co-relation queries the response was YES. Maximal size of possible extension queue 485. Compared 50733 event pairs, 799 based on Foata normal form. 15/7283 useless extension candidates. Maximal degree in co-relation 45443. Up to 5992 conditions per place. [2024-05-12 12:40:11,925 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 279 selfloop transitions, 110 changer transitions 0/401 dead transitions. [2024-05-12 12:40:11,925 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 401 transitions, 6797 flow [2024-05-12 12:40:11,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 12:40:11,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 12:40:11,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 200 transitions. [2024-05-12 12:40:11,926 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6211180124223602 [2024-05-12 12:40:11,926 INFO L175 Difference]: Start difference. First operand has 251 places, 366 transitions, 5757 flow. Second operand 7 states and 200 transitions. [2024-05-12 12:40:11,926 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 401 transitions, 6797 flow [2024-05-12 12:40:12,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 401 transitions, 6581 flow, removed 35 selfloop flow, removed 3 redundant places. [2024-05-12 12:40:12,704 INFO L231 Difference]: Finished difference. Result has 255 places, 369 transitions, 5830 flow [2024-05-12 12:40:12,704 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=5555, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5830, PETRI_PLACES=255, PETRI_TRANSITIONS=369} [2024-05-12 12:40:12,704 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 205 predicate places. [2024-05-12 12:40:12,704 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 369 transitions, 5830 flow [2024-05-12 12:40:12,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:40:12,704 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:40:12,704 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:40:12,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-05-12 12:40:12,705 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:40:12,705 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:40:12,705 INFO L85 PathProgramCache]: Analyzing trace with hash 1234798067, now seen corresponding path program 3 times [2024-05-12 12:40:12,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:40:12,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562564307] [2024-05-12 12:40:12,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:40:12,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:40:12,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:40:12,825 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:40:12,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:40:12,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562564307] [2024-05-12 12:40:12,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562564307] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:40:12,825 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:40:12,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:40:12,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925727606] [2024-05-12 12:40:12,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:40:12,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 12:40:12,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:40:12,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 12:40:12,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-05-12 12:40:12,860 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 12:40:12,861 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 369 transitions, 5830 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:40:12,861 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:40:12,861 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 12:40:12,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:40:13,973 INFO L124 PetriNetUnfolderBase]: 4690/7608 cut-off events. [2024-05-12 12:40:13,973 INFO L125 PetriNetUnfolderBase]: For 309147/309147 co-relation queries the response was YES. [2024-05-12 12:40:14,032 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47339 conditions, 7608 events. 4690/7608 cut-off events. For 309147/309147 co-relation queries the response was YES. Maximal size of possible extension queue 504. Compared 52667 event pairs, 893 based on Foata normal form. 20/7619 useless extension candidates. Maximal degree in co-relation 47221. Up to 6629 conditions per place. [2024-05-12 12:40:14,063 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 352 selfloop transitions, 42 changer transitions 0/406 dead transitions. [2024-05-12 12:40:14,064 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 406 transitions, 6810 flow [2024-05-12 12:40:14,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 12:40:14,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 12:40:14,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 213 transitions. [2024-05-12 12:40:14,064 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5788043478260869 [2024-05-12 12:40:14,064 INFO L175 Difference]: Start difference. First operand has 255 places, 369 transitions, 5830 flow. Second operand 8 states and 213 transitions. [2024-05-12 12:40:14,064 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 406 transitions, 6810 flow [2024-05-12 12:40:14,811 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 406 transitions, 6565 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-05-12 12:40:14,816 INFO L231 Difference]: Finished difference. Result has 258 places, 374 transitions, 5785 flow [2024-05-12 12:40:14,816 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=5587, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=369, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=327, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5785, PETRI_PLACES=258, PETRI_TRANSITIONS=374} [2024-05-12 12:40:14,817 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 208 predicate places. [2024-05-12 12:40:14,817 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 374 transitions, 5785 flow [2024-05-12 12:40:14,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:40:14,817 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:40:14,817 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:40:14,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-05-12 12:40:14,817 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:40:14,818 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:40:14,818 INFO L85 PathProgramCache]: Analyzing trace with hash 1234982765, now seen corresponding path program 1 times [2024-05-12 12:40:14,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:40:14,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048476321] [2024-05-12 12:40:14,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:40:14,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:40:14,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:40:14,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:40:14,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:40:14,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048476321] [2024-05-12 12:40:14,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048476321] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:40:14,916 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:40:14,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:40:14,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34837779] [2024-05-12 12:40:14,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:40:14,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 12:40:14,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:40:14,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 12:40:14,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-05-12 12:40:14,948 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 12:40:14,948 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 374 transitions, 5785 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:40:14,948 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:40:14,948 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 12:40:14,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:40:16,013 INFO L124 PetriNetUnfolderBase]: 4708/7488 cut-off events. [2024-05-12 12:40:16,013 INFO L125 PetriNetUnfolderBase]: For 279189/279189 co-relation queries the response was YES. [2024-05-12 12:40:16,065 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47185 conditions, 7488 events. 4708/7488 cut-off events. For 279189/279189 co-relation queries the response was YES. Maximal size of possible extension queue 503. Compared 51247 event pairs, 738 based on Foata normal form. 2/7486 useless extension candidates. Maximal degree in co-relation 47066. Up to 6869 conditions per place. [2024-05-12 12:40:16,095 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 366 selfloop transitions, 24 changer transitions 0/402 dead transitions. [2024-05-12 12:40:16,095 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 402 transitions, 6667 flow [2024-05-12 12:40:16,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 12:40:16,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 12:40:16,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 182 transitions. [2024-05-12 12:40:16,096 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5652173913043478 [2024-05-12 12:40:16,096 INFO L175 Difference]: Start difference. First operand has 258 places, 374 transitions, 5785 flow. Second operand 7 states and 182 transitions. [2024-05-12 12:40:16,096 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 402 transitions, 6667 flow [2024-05-12 12:40:16,901 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 402 transitions, 6533 flow, removed 29 selfloop flow, removed 6 redundant places. [2024-05-12 12:40:16,906 INFO L231 Difference]: Finished difference. Result has 260 places, 377 transitions, 5760 flow [2024-05-12 12:40:16,906 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=5651, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=374, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=350, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5760, PETRI_PLACES=260, PETRI_TRANSITIONS=377} [2024-05-12 12:40:16,906 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 210 predicate places. [2024-05-12 12:40:16,906 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 377 transitions, 5760 flow [2024-05-12 12:40:16,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:40:16,907 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:40:16,907 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:40:16,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-05-12 12:40:16,907 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:40:16,907 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:40:16,908 INFO L85 PathProgramCache]: Analyzing trace with hash 850206417, now seen corresponding path program 4 times [2024-05-12 12:40:16,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:40:16,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632172860] [2024-05-12 12:40:16,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:40:16,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:40:16,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:40:17,016 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:40:17,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:40:17,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632172860] [2024-05-12 12:40:17,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632172860] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:40:17,016 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:40:17,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:40:17,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238218533] [2024-05-12 12:40:17,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:40:17,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 12:40:17,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:40:17,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 12:40:17,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-05-12 12:40:17,049 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 12:40:17,049 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 377 transitions, 5760 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:40:17,049 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:40:17,050 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 12:40:17,050 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:40:18,248 INFO L124 PetriNetUnfolderBase]: 5091/8248 cut-off events. [2024-05-12 12:40:18,249 INFO L125 PetriNetUnfolderBase]: For 396725/396725 co-relation queries the response was YES. [2024-05-12 12:40:18,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49461 conditions, 8248 events. 5091/8248 cut-off events. For 396725/396725 co-relation queries the response was YES. Maximal size of possible extension queue 555. Compared 58319 event pairs, 776 based on Foata normal form. 54/8292 useless extension candidates. Maximal degree in co-relation 49340. Up to 6109 conditions per place. [2024-05-12 12:40:18,349 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 300 selfloop transitions, 118 changer transitions 0/430 dead transitions. [2024-05-12 12:40:18,349 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 430 transitions, 6950 flow [2024-05-12 12:40:18,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 12:40:18,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 12:40:18,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 240 transitions. [2024-05-12 12:40:18,351 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6521739130434783 [2024-05-12 12:40:18,351 INFO L175 Difference]: Start difference. First operand has 260 places, 377 transitions, 5760 flow. Second operand 8 states and 240 transitions. [2024-05-12 12:40:18,351 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 430 transitions, 6950 flow [2024-05-12 12:40:19,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 430 transitions, 6867 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-05-12 12:40:19,244 INFO L231 Difference]: Finished difference. Result has 263 places, 381 transitions, 6036 flow [2024-05-12 12:40:19,244 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=5677, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=377, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6036, PETRI_PLACES=263, PETRI_TRANSITIONS=381} [2024-05-12 12:40:19,245 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 213 predicate places. [2024-05-12 12:40:19,245 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 381 transitions, 6036 flow [2024-05-12 12:40:19,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:40:19,245 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:40:19,245 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:40:19,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-05-12 12:40:19,245 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:40:19,245 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:40:19,245 INFO L85 PathProgramCache]: Analyzing trace with hash 1078292265, now seen corresponding path program 2 times [2024-05-12 12:40:19,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:40:19,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517072371] [2024-05-12 12:40:19,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:40:19,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:40:19,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:40:19,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:40:19,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:40:19,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517072371] [2024-05-12 12:40:19,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517072371] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:40:19,349 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:40:19,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:40:19,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711373742] [2024-05-12 12:40:19,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:40:19,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 12:40:19,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:40:19,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 12:40:19,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-05-12 12:40:19,398 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 12:40:19,398 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 381 transitions, 6036 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:40:19,398 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:40:19,398 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 12:40:19,398 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:40:20,721 INFO L124 PetriNetUnfolderBase]: 5109/8247 cut-off events. [2024-05-12 12:40:20,721 INFO L125 PetriNetUnfolderBase]: For 304257/304257 co-relation queries the response was YES. [2024-05-12 12:40:20,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50959 conditions, 8247 events. 5109/8247 cut-off events. For 304257/304257 co-relation queries the response was YES. Maximal size of possible extension queue 559. Compared 58276 event pairs, 1807 based on Foata normal form. 2/8194 useless extension candidates. Maximal degree in co-relation 50837. Up to 7470 conditions per place. [2024-05-12 12:40:20,824 INFO L140 encePairwiseOnDemand]: 40/46 looper letters, 366 selfloop transitions, 24 changer transitions 0/402 dead transitions. [2024-05-12 12:40:20,824 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 402 transitions, 6900 flow [2024-05-12 12:40:20,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 12:40:20,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 12:40:20,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 138 transitions. [2024-05-12 12:40:20,825 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-05-12 12:40:20,825 INFO L175 Difference]: Start difference. First operand has 263 places, 381 transitions, 6036 flow. Second operand 5 states and 138 transitions. [2024-05-12 12:40:20,825 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 402 transitions, 6900 flow [2024-05-12 12:40:21,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 402 transitions, 6659 flow, removed 32 selfloop flow, removed 5 redundant places. [2024-05-12 12:40:21,740 INFO L231 Difference]: Finished difference. Result has 263 places, 383 transitions, 5895 flow [2024-05-12 12:40:21,741 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=5797, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=381, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=357, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=5895, PETRI_PLACES=263, PETRI_TRANSITIONS=383} [2024-05-12 12:40:21,741 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 213 predicate places. [2024-05-12 12:40:21,741 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 383 transitions, 5895 flow [2024-05-12 12:40:21,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:40:21,741 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:40:21,741 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:40:21,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-05-12 12:40:21,742 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:40:21,742 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:40:21,742 INFO L85 PathProgramCache]: Analyzing trace with hash 1086863145, now seen corresponding path program 3 times [2024-05-12 12:40:21,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:40:21,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251640089] [2024-05-12 12:40:21,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:40:21,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:40:21,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:40:21,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:40:21,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:40:21,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251640089] [2024-05-12 12:40:21,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251640089] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:40:21,841 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:40:21,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:40:21,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032797213] [2024-05-12 12:40:21,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:40:21,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 12:40:21,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:40:21,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 12:40:21,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-05-12 12:40:21,897 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 12:40:21,897 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 383 transitions, 5895 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:40:21,897 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:40:21,897 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 12:40:21,897 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:40:23,105 INFO L124 PetriNetUnfolderBase]: 5104/8191 cut-off events. [2024-05-12 12:40:23,105 INFO L125 PetriNetUnfolderBase]: For 291261/291263 co-relation queries the response was YES. [2024-05-12 12:40:23,194 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49426 conditions, 8191 events. 5104/8191 cut-off events. For 291261/291263 co-relation queries the response was YES. Maximal size of possible extension queue 553. Compared 57477 event pairs, 1802 based on Foata normal form. 4/8151 useless extension candidates. Maximal degree in co-relation 49303. Up to 7431 conditions per place. [2024-05-12 12:40:23,232 INFO L140 encePairwiseOnDemand]: 40/46 looper letters, 365 selfloop transitions, 25 changer transitions 0/402 dead transitions. [2024-05-12 12:40:23,232 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 402 transitions, 6755 flow [2024-05-12 12:40:23,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 12:40:23,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 12:40:23,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 135 transitions. [2024-05-12 12:40:23,233 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5869565217391305 [2024-05-12 12:40:23,233 INFO L175 Difference]: Start difference. First operand has 263 places, 383 transitions, 5895 flow. Second operand 5 states and 135 transitions. [2024-05-12 12:40:23,233 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 402 transitions, 6755 flow [2024-05-12 12:40:24,037 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 402 transitions, 6673 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-05-12 12:40:24,042 INFO L231 Difference]: Finished difference. Result has 265 places, 385 transitions, 5914 flow [2024-05-12 12:40:24,042 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=5817, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=383, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=358, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=5914, PETRI_PLACES=265, PETRI_TRANSITIONS=385} [2024-05-12 12:40:24,042 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 215 predicate places. [2024-05-12 12:40:24,042 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 385 transitions, 5914 flow [2024-05-12 12:40:24,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:40:24,042 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:40:24,042 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:40:24,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-05-12 12:40:24,043 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:40:24,043 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:40:24,043 INFO L85 PathProgramCache]: Analyzing trace with hash 515749596, now seen corresponding path program 1 times [2024-05-12 12:40:24,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:40:24,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428505596] [2024-05-12 12:40:24,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:40:24,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:40:24,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:40:24,156 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:40:24,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:40:24,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428505596] [2024-05-12 12:40:24,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428505596] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:40:24,157 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:40:24,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-05-12 12:40:24,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682963857] [2024-05-12 12:40:24,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:40:24,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-05-12 12:40:24,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:40:24,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-05-12 12:40:24,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-05-12 12:40:24,169 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 46 [2024-05-12 12:40:24,170 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 385 transitions, 5914 flow. Second operand has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:40:24,170 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:40:24,170 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 46 [2024-05-12 12:40:24,170 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:40:25,280 INFO L124 PetriNetUnfolderBase]: 3507/7529 cut-off events. [2024-05-12 12:40:25,280 INFO L125 PetriNetUnfolderBase]: For 115543/116567 co-relation queries the response was YES. [2024-05-12 12:40:25,331 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30115 conditions, 7529 events. 3507/7529 cut-off events. For 115543/116567 co-relation queries the response was YES. Maximal size of possible extension queue 476. Compared 68049 event pairs, 443 based on Foata normal form. 366/7354 useless extension candidates. Maximal degree in co-relation 29991. Up to 2881 conditions per place. [2024-05-12 12:40:25,351 INFO L140 encePairwiseOnDemand]: 40/46 looper letters, 32 selfloop transitions, 131 changer transitions 0/399 dead transitions. [2024-05-12 12:40:25,351 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 399 transitions, 6294 flow [2024-05-12 12:40:25,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-05-12 12:40:25,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-05-12 12:40:25,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 135 transitions. [2024-05-12 12:40:25,352 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7336956521739131 [2024-05-12 12:40:25,352 INFO L175 Difference]: Start difference. First operand has 265 places, 385 transitions, 5914 flow. Second operand 4 states and 135 transitions. [2024-05-12 12:40:25,352 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 399 transitions, 6294 flow [2024-05-12 12:40:25,719 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 399 transitions, 6213 flow, removed 17 selfloop flow, removed 3 redundant places. [2024-05-12 12:40:25,724 INFO L231 Difference]: Finished difference. Result has 267 places, 386 transitions, 6363 flow [2024-05-12 12:40:25,724 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=5833, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=385, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=6363, PETRI_PLACES=267, PETRI_TRANSITIONS=386} [2024-05-12 12:40:25,724 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 217 predicate places. [2024-05-12 12:40:25,724 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 386 transitions, 6363 flow [2024-05-12 12:40:25,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:40:25,725 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:40:25,725 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] [2024-05-12 12:40:25,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-05-12 12:40:25,725 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:40:25,725 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:40:25,725 INFO L85 PathProgramCache]: Analyzing trace with hash -40162407, now seen corresponding path program 1 times [2024-05-12 12:40:25,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:40:25,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938775179] [2024-05-12 12:40:25,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:40:25,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:40:25,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:40:25,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:40:25,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:40:25,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938775179] [2024-05-12 12:40:25,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938775179] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:40:25,856 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:40:25,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 12:40:25,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158682076] [2024-05-12 12:40:25,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:40:25,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 12:40:25,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:40:25,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 12:40:25,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-05-12 12:40:25,896 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 12:40:25,897 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 386 transitions, 6363 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:40:25,897 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:40:25,897 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 12:40:25,897 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:40:27,389 INFO L124 PetriNetUnfolderBase]: 5684/9600 cut-off events. [2024-05-12 12:40:27,390 INFO L125 PetriNetUnfolderBase]: For 465349/465411 co-relation queries the response was YES. [2024-05-12 12:40:27,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56822 conditions, 9600 events. 5684/9600 cut-off events. For 465349/465411 co-relation queries the response was YES. Maximal size of possible extension queue 566. Compared 72008 event pairs, 1665 based on Foata normal form. 59/9230 useless extension candidates. Maximal degree in co-relation 56696. Up to 5320 conditions per place. [2024-05-12 12:40:27,513 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 197 selfloop transitions, 233 changer transitions 0/443 dead transitions. [2024-05-12 12:40:27,513 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 443 transitions, 8039 flow [2024-05-12 12:40:27,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 12:40:27,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 12:40:27,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 241 transitions. [2024-05-12 12:40:27,514 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.654891304347826 [2024-05-12 12:40:27,514 INFO L175 Difference]: Start difference. First operand has 267 places, 386 transitions, 6363 flow. Second operand 8 states and 241 transitions. [2024-05-12 12:40:27,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 443 transitions, 8039 flow [2024-05-12 12:40:28,848 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 443 transitions, 7907 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-05-12 12:40:28,854 INFO L231 Difference]: Finished difference. Result has 273 places, 390 transitions, 6814 flow [2024-05-12 12:40:28,855 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=6231, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=386, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=231, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6814, PETRI_PLACES=273, PETRI_TRANSITIONS=390} [2024-05-12 12:40:28,855 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 223 predicate places. [2024-05-12 12:40:28,855 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 390 transitions, 6814 flow [2024-05-12 12:40:28,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:40:28,855 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:40:28,856 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] [2024-05-12 12:40:28,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-05-12 12:40:28,856 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:40:28,856 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:40:28,856 INFO L85 PathProgramCache]: Analyzing trace with hash -573824715, now seen corresponding path program 2 times [2024-05-12 12:40:28,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:40:28,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077690375] [2024-05-12 12:40:28,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:40:28,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:40:28,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:40:28,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:40:28,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:40:28,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077690375] [2024-05-12 12:40:28,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077690375] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:40:28,970 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:40:28,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 12:40:28,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911946504] [2024-05-12 12:40:28,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:40:28,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 12:40:28,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:40:28,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 12:40:28,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-05-12 12:40:29,014 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 12:40:29,015 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 390 transitions, 6814 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:40:29,015 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:40:29,015 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 12:40:29,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:40:30,690 INFO L124 PetriNetUnfolderBase]: 6035/10152 cut-off events. [2024-05-12 12:40:30,690 INFO L125 PetriNetUnfolderBase]: For 500106/500168 co-relation queries the response was YES. [2024-05-12 12:40:30,785 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61348 conditions, 10152 events. 6035/10152 cut-off events. For 500106/500168 co-relation queries the response was YES. Maximal size of possible extension queue 620. Compared 76918 event pairs, 2349 based on Foata normal form. 65/9762 useless extension candidates. Maximal degree in co-relation 61221. Up to 8084 conditions per place. [2024-05-12 12:40:30,823 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 195 selfloop transitions, 219 changer transitions 0/427 dead transitions. [2024-05-12 12:40:30,823 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 427 transitions, 8204 flow [2024-05-12 12:40:30,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 12:40:30,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 12:40:30,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 226 transitions. [2024-05-12 12:40:30,824 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6141304347826086 [2024-05-12 12:40:30,824 INFO L175 Difference]: Start difference. First operand has 273 places, 390 transitions, 6814 flow. Second operand 8 states and 226 transitions. [2024-05-12 12:40:30,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 427 transitions, 8204 flow [2024-05-12 12:40:32,459 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 427 transitions, 7858 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-05-12 12:40:32,465 INFO L231 Difference]: Finished difference. Result has 277 places, 392 transitions, 6975 flow [2024-05-12 12:40:32,465 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=6472, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=390, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=217, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6975, PETRI_PLACES=277, PETRI_TRANSITIONS=392} [2024-05-12 12:40:32,465 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 227 predicate places. [2024-05-12 12:40:32,466 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 392 transitions, 6975 flow [2024-05-12 12:40:32,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:40:32,466 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:40:32,466 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] [2024-05-12 12:40:32,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-05-12 12:40:32,466 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:40:32,467 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:40:32,467 INFO L85 PathProgramCache]: Analyzing trace with hash -574151145, now seen corresponding path program 3 times [2024-05-12 12:40:32,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:40:32,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188561982] [2024-05-12 12:40:32,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:40:32,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:40:32,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:40:32,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:40:32,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:40:32,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188561982] [2024-05-12 12:40:32,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188561982] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:40:32,570 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:40:32,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 12:40:32,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293900870] [2024-05-12 12:40:32,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:40:32,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 12:40:32,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:40:32,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 12:40:32,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-05-12 12:40:32,611 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 12:40:32,611 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 392 transitions, 6975 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:40:32,611 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:40:32,611 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 12:40:32,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:40:34,312 INFO L124 PetriNetUnfolderBase]: 6323/10640 cut-off events. [2024-05-12 12:40:34,312 INFO L125 PetriNetUnfolderBase]: For 502620/502682 co-relation queries the response was YES. [2024-05-12 12:40:34,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64030 conditions, 10640 events. 6323/10640 cut-off events. For 502620/502682 co-relation queries the response was YES. Maximal size of possible extension queue 659. Compared 81687 event pairs, 2301 based on Foata normal form. 59/10237 useless extension candidates. Maximal degree in co-relation 63901. Up to 7976 conditions per place. [2024-05-12 12:40:34,464 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 201 selfloop transitions, 223 changer transitions 0/437 dead transitions. [2024-05-12 12:40:34,465 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 437 transitions, 8433 flow [2024-05-12 12:40:34,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 12:40:34,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 12:40:34,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 233 transitions. [2024-05-12 12:40:34,465 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6331521739130435 [2024-05-12 12:40:34,465 INFO L175 Difference]: Start difference. First operand has 277 places, 392 transitions, 6975 flow. Second operand 8 states and 233 transitions. [2024-05-12 12:40:34,465 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 437 transitions, 8433 flow [2024-05-12 12:40:35,932 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 437 transitions, 7970 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-05-12 12:40:35,938 INFO L231 Difference]: Finished difference. Result has 279 places, 394 transitions, 7025 flow [2024-05-12 12:40:35,939 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=6512, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=392, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=221, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7025, PETRI_PLACES=279, PETRI_TRANSITIONS=394} [2024-05-12 12:40:35,946 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 229 predicate places. [2024-05-12 12:40:35,946 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 394 transitions, 7025 flow [2024-05-12 12:40:35,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:40:35,946 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:40:35,946 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:40:35,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-05-12 12:40:35,946 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:40:35,946 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:40:35,946 INFO L85 PathProgramCache]: Analyzing trace with hash -631907869, now seen corresponding path program 1 times [2024-05-12 12:40:35,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:40:35,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072568740] [2024-05-12 12:40:35,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:40:35,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:40:35,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:40:36,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:40:36,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:40:36,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072568740] [2024-05-12 12:40:36,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072568740] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:40:36,034 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:40:36,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 12:40:36,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005109901] [2024-05-12 12:40:36,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:40:36,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 12:40:36,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:40:36,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 12:40:36,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-05-12 12:40:36,056 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 12:40:36,056 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 394 transitions, 7025 flow. Second operand has 6 states, 6 states have (on average 18.833333333333332) internal successors, (113), 6 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:40:36,056 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:40:36,056 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 12:40:36,056 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:40:37,720 INFO L124 PetriNetUnfolderBase]: 6360/10705 cut-off events. [2024-05-12 12:40:37,720 INFO L125 PetriNetUnfolderBase]: For 443209/443510 co-relation queries the response was YES. [2024-05-12 12:40:37,834 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64711 conditions, 10705 events. 6360/10705 cut-off events. For 443209/443510 co-relation queries the response was YES. Maximal size of possible extension queue 659. Compared 82333 event pairs, 2527 based on Foata normal form. 102/10324 useless extension candidates. Maximal degree in co-relation 64581. Up to 9424 conditions per place. [2024-05-12 12:40:37,874 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 306 selfloop transitions, 106 changer transitions 0/425 dead transitions. [2024-05-12 12:40:37,874 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 425 transitions, 8561 flow [2024-05-12 12:40:37,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 12:40:37,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 12:40:37,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 163 transitions. [2024-05-12 12:40:37,875 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5905797101449275 [2024-05-12 12:40:37,875 INFO L175 Difference]: Start difference. First operand has 279 places, 394 transitions, 7025 flow. Second operand 6 states and 163 transitions. [2024-05-12 12:40:37,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 425 transitions, 8561 flow [2024-05-12 12:40:39,411 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 425 transitions, 8068 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-05-12 12:40:39,417 INFO L231 Difference]: Finished difference. Result has 279 places, 406 transitions, 7008 flow [2024-05-12 12:40:39,417 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=6548, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=394, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=300, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=7008, PETRI_PLACES=279, PETRI_TRANSITIONS=406} [2024-05-12 12:40:39,417 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 229 predicate places. [2024-05-12 12:40:39,418 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 406 transitions, 7008 flow [2024-05-12 12:40:39,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.833333333333332) internal successors, (113), 6 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:40:39,418 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:40:39,418 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] [2024-05-12 12:40:39,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-05-12 12:40:39,418 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:40:39,418 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:40:39,418 INFO L85 PathProgramCache]: Analyzing trace with hash -1774106279, now seen corresponding path program 2 times [2024-05-12 12:40:39,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:40:39,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857323738] [2024-05-12 12:40:39,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:40:39,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:40:39,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:40:39,524 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:40:39,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:40:39,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857323738] [2024-05-12 12:40:39,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857323738] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:40:39,524 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:40:39,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 12:40:39,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679413774] [2024-05-12 12:40:39,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:40:39,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 12:40:39,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:40:39,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 12:40:39,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-05-12 12:40:39,548 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 12:40:39,549 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 406 transitions, 7008 flow. Second operand has 6 states, 6 states have (on average 18.833333333333332) internal successors, (113), 6 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:40:39,549 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:40:39,549 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 12:40:39,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:40:41,256 INFO L124 PetriNetUnfolderBase]: 6357/10701 cut-off events. [2024-05-12 12:40:41,256 INFO L125 PetriNetUnfolderBase]: For 443411/443699 co-relation queries the response was YES. [2024-05-12 12:40:41,408 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63551 conditions, 10701 events. 6357/10701 cut-off events. For 443411/443699 co-relation queries the response was YES. Maximal size of possible extension queue 659. Compared 82165 event pairs, 2521 based on Foata normal form. 101/10320 useless extension candidates. Maximal degree in co-relation 63420. Up to 9421 conditions per place. [2024-05-12 12:40:41,448 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 307 selfloop transitions, 107 changer transitions 0/427 dead transitions. [2024-05-12 12:40:41,448 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 427 transitions, 8164 flow [2024-05-12 12:40:41,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 12:40:41,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 12:40:41,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 165 transitions. [2024-05-12 12:40:41,449 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5978260869565217 [2024-05-12 12:40:41,449 INFO L175 Difference]: Start difference. First operand has 279 places, 406 transitions, 7008 flow. Second operand 6 states and 165 transitions. [2024-05-12 12:40:41,449 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 427 transitions, 8164 flow [2024-05-12 12:40:42,635 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 427 transitions, 8014 flow, removed 8 selfloop flow, removed 2 redundant places. [2024-05-12 12:40:42,640 INFO L231 Difference]: Finished difference. Result has 283 places, 406 transitions, 7078 flow [2024-05-12 12:40:42,641 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=6858, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=406, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=7078, PETRI_PLACES=283, PETRI_TRANSITIONS=406} [2024-05-12 12:40:42,641 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 233 predicate places. [2024-05-12 12:40:42,641 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 406 transitions, 7078 flow [2024-05-12 12:40:42,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.833333333333332) internal successors, (113), 6 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:40:42,641 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:40:42,641 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] [2024-05-12 12:40:42,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-05-12 12:40:42,641 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:40:42,641 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:40:42,642 INFO L85 PathProgramCache]: Analyzing trace with hash -1768445369, now seen corresponding path program 3 times [2024-05-12 12:40:42,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:40:42,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636179130] [2024-05-12 12:40:42,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:40:42,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:40:42,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:40:42,730 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:40:42,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:40:42,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636179130] [2024-05-12 12:40:42,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636179130] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:40:42,731 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:40:42,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 12:40:42,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561698064] [2024-05-12 12:40:42,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:40:42,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 12:40:42,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:40:42,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 12:40:42,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-05-12 12:40:42,761 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 12:40:42,761 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 406 transitions, 7078 flow. Second operand has 6 states, 6 states have (on average 18.833333333333332) internal successors, (113), 6 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:40:42,761 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:40:42,761 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 12:40:42,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:40:44,436 INFO L124 PetriNetUnfolderBase]: 6354/10698 cut-off events. [2024-05-12 12:40:44,436 INFO L125 PetriNetUnfolderBase]: For 452561/452855 co-relation queries the response was YES. [2024-05-12 12:40:44,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63654 conditions, 10698 events. 6354/10698 cut-off events. For 452561/452855 co-relation queries the response was YES. Maximal size of possible extension queue 659. Compared 82209 event pairs, 2527 based on Foata normal form. 93/10308 useless extension candidates. Maximal degree in co-relation 63522. Up to 9418 conditions per place. [2024-05-12 12:40:44,609 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 306 selfloop transitions, 102 changer transitions 0/421 dead transitions. [2024-05-12 12:40:44,609 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 421 transitions, 8210 flow [2024-05-12 12:40:44,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 12:40:44,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 12:40:44,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 160 transitions. [2024-05-12 12:40:44,609 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5797101449275363 [2024-05-12 12:40:44,610 INFO L175 Difference]: Start difference. First operand has 283 places, 406 transitions, 7078 flow. Second operand 6 states and 160 transitions. [2024-05-12 12:40:44,610 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 421 transitions, 8210 flow [2024-05-12 12:40:46,053 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 421 transitions, 7815 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-05-12 12:40:46,059 INFO L231 Difference]: Finished difference. Result has 283 places, 406 transitions, 6893 flow [2024-05-12 12:40:46,059 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=6683, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=406, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=304, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6893, PETRI_PLACES=283, PETRI_TRANSITIONS=406} [2024-05-12 12:40:46,059 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 233 predicate places. [2024-05-12 12:40:46,059 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 406 transitions, 6893 flow [2024-05-12 12:40:46,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.833333333333332) internal successors, (113), 6 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:40:46,060 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:40:46,060 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] [2024-05-12 12:40:46,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-05-12 12:40:46,060 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:40:46,060 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:40:46,060 INFO L85 PathProgramCache]: Analyzing trace with hash -1773986309, now seen corresponding path program 4 times [2024-05-12 12:40:46,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:40:46,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995763013] [2024-05-12 12:40:46,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:40:46,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:40:46,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:40:46,168 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:40:46,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:40:46,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995763013] [2024-05-12 12:40:46,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995763013] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:40:46,168 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:40:46,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:40:46,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358242779] [2024-05-12 12:40:46,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:40:46,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 12:40:46,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:40:46,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 12:40:46,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-05-12 12:40:46,196 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 12:40:46,196 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 406 transitions, 6893 flow. Second operand has 7 states, 7 states have (on average 18.428571428571427) internal successors, (129), 7 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:40:46,196 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:40:46,196 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 12:40:46,196 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:40:47,923 INFO L124 PetriNetUnfolderBase]: 6361/10699 cut-off events. [2024-05-12 12:40:47,923 INFO L125 PetriNetUnfolderBase]: For 457428/457507 co-relation queries the response was YES. [2024-05-12 12:40:48,045 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63746 conditions, 10699 events. 6361/10699 cut-off events. For 457428/457507 co-relation queries the response was YES. Maximal size of possible extension queue 659. Compared 82233 event pairs, 2504 based on Foata normal form. 49/10265 useless extension candidates. Maximal degree in co-relation 63615. Up to 9426 conditions per place. [2024-05-12 12:40:48,085 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 301 selfloop transitions, 120 changer transitions 0/434 dead transitions. [2024-05-12 12:40:48,086 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 434 transitions, 8132 flow [2024-05-12 12:40:48,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 12:40:48,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 12:40:48,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 193 transitions. [2024-05-12 12:40:48,086 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5993788819875776 [2024-05-12 12:40:48,087 INFO L175 Difference]: Start difference. First operand has 283 places, 406 transitions, 6893 flow. Second operand 7 states and 193 transitions. [2024-05-12 12:40:48,087 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 434 transitions, 8132 flow [2024-05-12 12:40:49,744 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 434 transitions, 7922 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-05-12 12:40:49,750 INFO L231 Difference]: Finished difference. Result has 286 places, 409 transitions, 6980 flow [2024-05-12 12:40:49,751 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=6686, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=406, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=289, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6980, PETRI_PLACES=286, PETRI_TRANSITIONS=409} [2024-05-12 12:40:49,751 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 236 predicate places. [2024-05-12 12:40:49,751 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 409 transitions, 6980 flow [2024-05-12 12:40:49,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.428571428571427) internal successors, (129), 7 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:40:49,751 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:40:49,751 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] [2024-05-12 12:40:49,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-05-12 12:40:49,752 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:40:49,752 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:40:49,752 INFO L85 PathProgramCache]: Analyzing trace with hash -1882243367, now seen corresponding path program 5 times [2024-05-12 12:40:49,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:40:49,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449162420] [2024-05-12 12:40:49,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:40:49,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:40:49,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:40:49,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:40:49,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:40:49,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449162420] [2024-05-12 12:40:49,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449162420] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:40:49,846 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:40:49,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:40:49,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133354581] [2024-05-12 12:40:49,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:40:49,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 12:40:49,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:40:49,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 12:40:49,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-05-12 12:40:49,876 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 12:40:49,877 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 409 transitions, 6980 flow. Second operand has 7 states, 7 states have (on average 18.428571428571427) internal successors, (129), 7 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:40:49,877 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:40:49,877 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 12:40:49,877 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:40:51,590 INFO L124 PetriNetUnfolderBase]: 6358/10691 cut-off events. [2024-05-12 12:40:51,590 INFO L125 PetriNetUnfolderBase]: For 466565/466643 co-relation queries the response was YES. [2024-05-12 12:40:51,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63719 conditions, 10691 events. 6358/10691 cut-off events. For 466565/466643 co-relation queries the response was YES. Maximal size of possible extension queue 659. Compared 82093 event pairs, 2496 based on Foata normal form. 52/10255 useless extension candidates. Maximal degree in co-relation 63588. Up to 9423 conditions per place. [2024-05-12 12:40:51,748 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 303 selfloop transitions, 115 changer transitions 0/431 dead transitions. [2024-05-12 12:40:51,748 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 431 transitions, 8300 flow [2024-05-12 12:40:51,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 12:40:51,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 12:40:51,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 229 transitions. [2024-05-12 12:40:51,749 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5531400966183575 [2024-05-12 12:40:51,749 INFO L175 Difference]: Start difference. First operand has 286 places, 409 transitions, 6980 flow. Second operand 9 states and 229 transitions. [2024-05-12 12:40:51,749 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 431 transitions, 8300 flow [2024-05-12 12:40:53,348 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 431 transitions, 8131 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-05-12 12:40:53,354 INFO L231 Difference]: Finished difference. Result has 291 places, 409 transitions, 7047 flow [2024-05-12 12:40:53,354 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=6811, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=409, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7047, PETRI_PLACES=291, PETRI_TRANSITIONS=409} [2024-05-12 12:40:53,354 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 241 predicate places. [2024-05-12 12:40:53,354 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 409 transitions, 7047 flow [2024-05-12 12:40:53,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.428571428571427) internal successors, (129), 7 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:40:53,354 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:40:53,355 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] [2024-05-12 12:40:53,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-05-12 12:40:53,355 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:40:53,355 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:40:53,355 INFO L85 PathProgramCache]: Analyzing trace with hash -1462871611, now seen corresponding path program 6 times [2024-05-12 12:40:53,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:40:53,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885306319] [2024-05-12 12:40:53,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:40:53,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:40:53,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:40:53,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:40:53,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:40:53,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885306319] [2024-05-12 12:40:53,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885306319] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:40:53,468 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:40:53,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:40:53,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411362079] [2024-05-12 12:40:53,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:40:53,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 12:40:53,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:40:53,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 12:40:53,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-05-12 12:40:53,487 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 12:40:53,487 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 409 transitions, 7047 flow. Second operand has 7 states, 7 states have (on average 18.428571428571427) internal successors, (129), 7 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:40:53,487 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:40:53,487 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 12:40:53,487 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:40:55,419 INFO L124 PetriNetUnfolderBase]: 6355/10687 cut-off events. [2024-05-12 12:40:55,419 INFO L125 PetriNetUnfolderBase]: For 476831/476905 co-relation queries the response was YES. [2024-05-12 12:40:55,510 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63779 conditions, 10687 events. 6355/10687 cut-off events. For 476831/476905 co-relation queries the response was YES. Maximal size of possible extension queue 659. Compared 81975 event pairs, 2496 based on Foata normal form. 48/10247 useless extension candidates. Maximal degree in co-relation 63646. Up to 9420 conditions per place. [2024-05-12 12:40:55,547 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 305 selfloop transitions, 110 changer transitions 0/428 dead transitions. [2024-05-12 12:40:55,547 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 428 transitions, 8215 flow [2024-05-12 12:40:55,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 12:40:55,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 12:40:55,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 186 transitions. [2024-05-12 12:40:55,548 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.577639751552795 [2024-05-12 12:40:55,548 INFO L175 Difference]: Start difference. First operand has 291 places, 409 transitions, 7047 flow. Second operand 7 states and 186 transitions. [2024-05-12 12:40:55,548 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 428 transitions, 8215 flow [2024-05-12 12:40:57,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 428 transitions, 7909 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-05-12 12:40:57,192 INFO L231 Difference]: Finished difference. Result has 290 places, 409 transitions, 6969 flow [2024-05-12 12:40:57,193 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=6741, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=409, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6969, PETRI_PLACES=290, PETRI_TRANSITIONS=409} [2024-05-12 12:40:57,193 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 240 predicate places. [2024-05-12 12:40:57,193 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 409 transitions, 6969 flow [2024-05-12 12:40:57,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.428571428571427) internal successors, (129), 7 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:40:57,193 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:40:57,193 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] [2024-05-12 12:40:57,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-05-12 12:40:57,194 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:40:57,194 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:40:57,194 INFO L85 PathProgramCache]: Analyzing trace with hash -1462871239, now seen corresponding path program 1 times [2024-05-12 12:40:57,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:40:57,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138180062] [2024-05-12 12:40:57,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:40:57,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:40:57,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:40:57,303 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:40:57,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:40:57,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138180062] [2024-05-12 12:40:57,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138180062] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:40:57,303 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:40:57,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 12:40:57,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793668911] [2024-05-12 12:40:57,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:40:57,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 12:40:57,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:40:57,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 12:40:57,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-05-12 12:40:57,332 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 12:40:57,333 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 409 transitions, 6969 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:40:57,333 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:40:57,333 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 12:40:57,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:40:59,114 INFO L124 PetriNetUnfolderBase]: 6391/10743 cut-off events. [2024-05-12 12:40:59,114 INFO L125 PetriNetUnfolderBase]: For 494470/494550 co-relation queries the response was YES. [2024-05-12 12:40:59,254 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64540 conditions, 10743 events. 6391/10743 cut-off events. For 494470/494550 co-relation queries the response was YES. Maximal size of possible extension queue 659. Compared 82463 event pairs, 2527 based on Foata normal form. 29/10282 useless extension candidates. Maximal degree in co-relation 64407. Up to 9117 conditions per place. [2024-05-12 12:40:59,295 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 205 selfloop transitions, 223 changer transitions 0/441 dead transitions. [2024-05-12 12:40:59,295 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 441 transitions, 8485 flow [2024-05-12 12:40:59,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 12:40:59,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 12:40:59,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 216 transitions. [2024-05-12 12:40:59,297 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5869565217391305 [2024-05-12 12:40:59,297 INFO L175 Difference]: Start difference. First operand has 290 places, 409 transitions, 6969 flow. Second operand 8 states and 216 transitions. [2024-05-12 12:40:59,297 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 441 transitions, 8485 flow [2024-05-12 12:41:01,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 441 transitions, 8314 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-05-12 12:41:01,173 INFO L231 Difference]: Finished difference. Result has 293 places, 417 transitions, 7411 flow [2024-05-12 12:41:01,173 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=6798, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=409, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=216, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7411, PETRI_PLACES=293, PETRI_TRANSITIONS=417} [2024-05-12 12:41:01,174 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 243 predicate places. [2024-05-12 12:41:01,174 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 417 transitions, 7411 flow [2024-05-12 12:41:01,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:41:01,174 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:41:01,174 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] [2024-05-12 12:41:01,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-05-12 12:41:01,174 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:41:01,174 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:41:01,174 INFO L85 PathProgramCache]: Analyzing trace with hash -1462865659, now seen corresponding path program 2 times [2024-05-12 12:41:01,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:41:01,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079186264] [2024-05-12 12:41:01,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:41:01,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:41:01,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:41:01,279 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:41:01,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:41:01,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079186264] [2024-05-12 12:41:01,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079186264] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:41:01,279 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:41:01,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 12:41:01,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66438748] [2024-05-12 12:41:01,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:41:01,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 12:41:01,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:41:01,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 12:41:01,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-05-12 12:41:01,324 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 12:41:01,324 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 417 transitions, 7411 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:41:01,324 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:41:01,324 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 12:41:01,324 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:41:03,185 INFO L124 PetriNetUnfolderBase]: 6385/10740 cut-off events. [2024-05-12 12:41:03,185 INFO L125 PetriNetUnfolderBase]: For 505137/505251 co-relation queries the response was YES. [2024-05-12 12:41:03,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65027 conditions, 10740 events. 6385/10740 cut-off events. For 505137/505251 co-relation queries the response was YES. Maximal size of possible extension queue 659. Compared 82514 event pairs, 2531 based on Foata normal form. 39/10293 useless extension candidates. Maximal degree in co-relation 64892. Up to 9112 conditions per place. [2024-05-12 12:41:03,360 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 206 selfloop transitions, 221 changer transitions 0/440 dead transitions. [2024-05-12 12:41:03,360 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 440 transitions, 8621 flow [2024-05-12 12:41:03,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 12:41:03,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 12:41:03,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 213 transitions. [2024-05-12 12:41:03,361 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5788043478260869 [2024-05-12 12:41:03,361 INFO L175 Difference]: Start difference. First operand has 293 places, 417 transitions, 7411 flow. Second operand 8 states and 213 transitions. [2024-05-12 12:41:03,361 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 440 transitions, 8621 flow [2024-05-12 12:41:05,370 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 440 transitions, 8105 flow, removed 39 selfloop flow, removed 5 redundant places. [2024-05-12 12:41:05,376 INFO L231 Difference]: Finished difference. Result has 296 places, 417 transitions, 7344 flow [2024-05-12 12:41:05,376 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=6895, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=417, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=221, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7344, PETRI_PLACES=296, PETRI_TRANSITIONS=417} [2024-05-12 12:41:05,376 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 246 predicate places. [2024-05-12 12:41:05,376 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 417 transitions, 7344 flow [2024-05-12 12:41:05,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:41:05,376 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:41:05,377 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] [2024-05-12 12:41:05,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-05-12 12:41:05,377 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:41:05,377 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:41:05,377 INFO L85 PathProgramCache]: Analyzing trace with hash -265880773, now seen corresponding path program 3 times [2024-05-12 12:41:05,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:41:05,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894516827] [2024-05-12 12:41:05,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:41:05,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:41:05,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:41:05,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:41:05,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:41:05,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894516827] [2024-05-12 12:41:05,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894516827] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:41:05,488 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:41:05,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 12:41:05,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548826465] [2024-05-12 12:41:05,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:41:05,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 12:41:05,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:41:05,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 12:41:05,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-05-12 12:41:05,515 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 12:41:05,515 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 417 transitions, 7344 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:41:05,515 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:41:05,515 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 12:41:05,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:41:07,301 INFO L124 PetriNetUnfolderBase]: 6432/10808 cut-off events. [2024-05-12 12:41:07,302 INFO L125 PetriNetUnfolderBase]: For 525400/525514 co-relation queries the response was YES. [2024-05-12 12:41:07,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65987 conditions, 10808 events. 6432/10808 cut-off events. For 525400/525514 co-relation queries the response was YES. Maximal size of possible extension queue 659. Compared 82981 event pairs, 2531 based on Foata normal form. 35/10344 useless extension candidates. Maximal degree in co-relation 65851. Up to 9159 conditions per place. [2024-05-12 12:41:07,472 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 220 selfloop transitions, 217 changer transitions 0/450 dead transitions. [2024-05-12 12:41:07,472 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 450 transitions, 8967 flow [2024-05-12 12:41:07,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 12:41:07,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 12:41:07,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 234 transitions. [2024-05-12 12:41:07,481 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5652173913043478 [2024-05-12 12:41:07,481 INFO L175 Difference]: Start difference. First operand has 296 places, 417 transitions, 7344 flow. Second operand 9 states and 234 transitions. [2024-05-12 12:41:07,481 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 450 transitions, 8967 flow [2024-05-12 12:41:09,804 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 450 transitions, 8496 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-05-12 12:41:09,810 INFO L231 Difference]: Finished difference. Result has 298 places, 427 transitions, 7535 flow [2024-05-12 12:41:09,810 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=6891, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=417, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=207, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7535, PETRI_PLACES=298, PETRI_TRANSITIONS=427} [2024-05-12 12:41:09,811 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 248 predicate places. [2024-05-12 12:41:09,811 INFO L495 AbstractCegarLoop]: Abstraction has has 298 places, 427 transitions, 7535 flow [2024-05-12 12:41:09,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:41:09,811 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:41:09,811 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] [2024-05-12 12:41:09,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-05-12 12:41:09,811 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:41:09,812 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:41:09,812 INFO L85 PathProgramCache]: Analyzing trace with hash -493974433, now seen corresponding path program 4 times [2024-05-12 12:41:09,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:41:09,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233291308] [2024-05-12 12:41:09,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:41:09,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:41:09,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:41:09,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:41:09,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:41:09,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233291308] [2024-05-12 12:41:09,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233291308] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:41:09,917 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:41:09,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 12:41:09,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274923690] [2024-05-12 12:41:09,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:41:09,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 12:41:09,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:41:09,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 12:41:09,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-05-12 12:41:09,959 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 12:41:09,959 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 427 transitions, 7535 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:41:09,959 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:41:09,959 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 12:41:09,959 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:41:11,766 INFO L124 PetriNetUnfolderBase]: 6457/10837 cut-off events. [2024-05-12 12:41:11,766 INFO L125 PetriNetUnfolderBase]: For 539307/539381 co-relation queries the response was YES. [2024-05-12 12:41:11,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66581 conditions, 10837 events. 6457/10837 cut-off events. For 539307/539381 co-relation queries the response was YES. Maximal size of possible extension queue 659. Compared 83047 event pairs, 2519 based on Foata normal form. 29/10348 useless extension candidates. Maximal degree in co-relation 66444. Up to 9182 conditions per place. [2024-05-12 12:41:11,908 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 219 selfloop transitions, 227 changer transitions 0/459 dead transitions. [2024-05-12 12:41:11,908 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 459 transitions, 9300 flow [2024-05-12 12:41:11,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 12:41:11,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 12:41:11,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 237 transitions. [2024-05-12 12:41:11,909 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.572463768115942 [2024-05-12 12:41:11,909 INFO L175 Difference]: Start difference. First operand has 298 places, 427 transitions, 7535 flow. Second operand 9 states and 237 transitions. [2024-05-12 12:41:11,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 459 transitions, 9300 flow [2024-05-12 12:41:13,968 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 459 transitions, 8890 flow, removed 49 selfloop flow, removed 5 redundant places. [2024-05-12 12:41:13,975 INFO L231 Difference]: Finished difference. Result has 302 places, 436 transitions, 7791 flow [2024-05-12 12:41:13,975 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=7144, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=427, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=219, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7791, PETRI_PLACES=302, PETRI_TRANSITIONS=436} [2024-05-12 12:41:13,976 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 252 predicate places. [2024-05-12 12:41:13,976 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 436 transitions, 7791 flow [2024-05-12 12:41:13,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:41:13,976 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:41:13,976 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] [2024-05-12 12:41:13,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-05-12 12:41:13,976 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:41:13,976 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:41:13,976 INFO L85 PathProgramCache]: Analyzing trace with hash -1658978867, now seen corresponding path program 5 times [2024-05-12 12:41:13,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:41:13,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475385] [2024-05-12 12:41:13,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:41:13,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:41:13,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:41:14,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:41:14,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:41:14,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475385] [2024-05-12 12:41:14,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475385] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:41:14,082 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:41:14,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 12:41:14,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923771170] [2024-05-12 12:41:14,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:41:14,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 12:41:14,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:41:14,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 12:41:14,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-05-12 12:41:14,119 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 12:41:14,119 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 436 transitions, 7791 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:41:14,119 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:41:14,119 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 12:41:14,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:41:15,990 INFO L124 PetriNetUnfolderBase]: 6451/10844 cut-off events. [2024-05-12 12:41:15,990 INFO L125 PetriNetUnfolderBase]: For 549517/549630 co-relation queries the response was YES. [2024-05-12 12:41:16,111 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66430 conditions, 10844 events. 6451/10844 cut-off events. For 549517/549630 co-relation queries the response was YES. Maximal size of possible extension queue 659. Compared 83290 event pairs, 2539 based on Foata normal form. 34/10384 useless extension candidates. Maximal degree in co-relation 66291. Up to 9177 conditions per place. [2024-05-12 12:41:16,154 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 219 selfloop transitions, 224 changer transitions 0/456 dead transitions. [2024-05-12 12:41:16,155 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 456 transitions, 9037 flow [2024-05-12 12:41:16,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 12:41:16,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 12:41:16,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 212 transitions. [2024-05-12 12:41:16,155 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5760869565217391 [2024-05-12 12:41:16,155 INFO L175 Difference]: Start difference. First operand has 302 places, 436 transitions, 7791 flow. Second operand 8 states and 212 transitions. [2024-05-12 12:41:16,155 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 456 transitions, 9037 flow [2024-05-12 12:41:18,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 456 transitions, 8543 flow, removed 49 selfloop flow, removed 5 redundant places. [2024-05-12 12:41:18,320 INFO L231 Difference]: Finished difference. Result has 305 places, 436 transitions, 7752 flow [2024-05-12 12:41:18,321 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=7297, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=436, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=224, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7752, PETRI_PLACES=305, PETRI_TRANSITIONS=436} [2024-05-12 12:41:18,321 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 255 predicate places. [2024-05-12 12:41:18,321 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 436 transitions, 7752 flow [2024-05-12 12:41:18,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:41:18,321 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:41:18,321 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] [2024-05-12 12:41:18,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-05-12 12:41:18,321 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:41:18,322 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:41:18,322 INFO L85 PathProgramCache]: Analyzing trace with hash -259527317, now seen corresponding path program 4 times [2024-05-12 12:41:18,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:41:18,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911475812] [2024-05-12 12:41:18,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:41:18,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:41:18,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:41:18,439 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:41:18,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:41:18,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911475812] [2024-05-12 12:41:18,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911475812] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:41:18,440 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:41:18,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 12:41:18,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747281830] [2024-05-12 12:41:18,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:41:18,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 12:41:18,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:41:18,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 12:41:18,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-05-12 12:41:18,483 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 12:41:18,483 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 436 transitions, 7752 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:41:18,483 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:41:18,483 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 12:41:18,483 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:41:20,443 INFO L124 PetriNetUnfolderBase]: 6802/11442 cut-off events. [2024-05-12 12:41:20,443 INFO L125 PetriNetUnfolderBase]: For 700342/700459 co-relation queries the response was YES. [2024-05-12 12:41:20,681 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69067 conditions, 11442 events. 6802/11442 cut-off events. For 700342/700459 co-relation queries the response was YES. Maximal size of possible extension queue 708. Compared 88974 event pairs, 2721 based on Foata normal form. 74/11001 useless extension candidates. Maximal degree in co-relation 68927. Up to 9236 conditions per place. [2024-05-12 12:41:20,725 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 227 selfloop transitions, 226 changer transitions 0/466 dead transitions. [2024-05-12 12:41:20,725 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 466 transitions, 9126 flow [2024-05-12 12:41:20,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 12:41:20,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 12:41:20,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 219 transitions. [2024-05-12 12:41:20,726 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.595108695652174 [2024-05-12 12:41:20,726 INFO L175 Difference]: Start difference. First operand has 305 places, 436 transitions, 7752 flow. Second operand 8 states and 219 transitions. [2024-05-12 12:41:20,726 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 466 transitions, 9126 flow [2024-05-12 12:41:23,244 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 466 transitions, 8664 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-05-12 12:41:23,250 INFO L231 Difference]: Finished difference. Result has 306 places, 438 transitions, 7815 flow [2024-05-12 12:41:23,251 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=7290, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=436, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=224, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7815, PETRI_PLACES=306, PETRI_TRANSITIONS=438} [2024-05-12 12:41:23,251 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 256 predicate places. [2024-05-12 12:41:23,251 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 438 transitions, 7815 flow [2024-05-12 12:41:23,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:41:23,251 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:41:23,251 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] [2024-05-12 12:41:23,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-05-12 12:41:23,251 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:41:23,252 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:41:23,252 INFO L85 PathProgramCache]: Analyzing trace with hash 6500881, now seen corresponding path program 5 times [2024-05-12 12:41:23,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:41:23,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307687565] [2024-05-12 12:41:23,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:41:23,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:41:23,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:41:23,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:41:23,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:41:23,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307687565] [2024-05-12 12:41:23,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307687565] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:41:23,360 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:41:23,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 12:41:23,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552747711] [2024-05-12 12:41:23,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:41:23,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 12:41:23,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:41:23,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 12:41:23,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-05-12 12:41:23,395 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 12:41:23,395 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 438 transitions, 7815 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:41:23,395 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:41:23,396 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 12:41:23,396 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:41:25,764 INFO L124 PetriNetUnfolderBase]: 7153/12076 cut-off events. [2024-05-12 12:41:25,764 INFO L125 PetriNetUnfolderBase]: For 721779/721892 co-relation queries the response was YES. [2024-05-12 12:41:25,889 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72596 conditions, 12076 events. 7153/12076 cut-off events. For 721779/721892 co-relation queries the response was YES. Maximal size of possible extension queue 762. Compared 95203 event pairs, 2949 based on Foata normal form. 74/11617 useless extension candidates. Maximal degree in co-relation 72455. Up to 9797 conditions per place. [2024-05-12 12:41:25,934 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 228 selfloop transitions, 227 changer transitions 0/468 dead transitions. [2024-05-12 12:41:25,934 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 468 transitions, 9201 flow [2024-05-12 12:41:25,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 12:41:25,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 12:41:25,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 220 transitions. [2024-05-12 12:41:25,935 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5978260869565217 [2024-05-12 12:41:25,935 INFO L175 Difference]: Start difference. First operand has 306 places, 438 transitions, 7815 flow. Second operand 8 states and 220 transitions. [2024-05-12 12:41:25,935 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 468 transitions, 9201 flow [2024-05-12 12:41:28,690 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 468 transitions, 8716 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-05-12 12:41:28,697 INFO L231 Difference]: Finished difference. Result has 308 places, 440 transitions, 7861 flow [2024-05-12 12:41:28,697 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=7330, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=438, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=225, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7861, PETRI_PLACES=308, PETRI_TRANSITIONS=440} [2024-05-12 12:41:28,697 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 258 predicate places. [2024-05-12 12:41:28,697 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 440 transitions, 7861 flow [2024-05-12 12:41:28,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:41:28,698 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:41:28,698 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] [2024-05-12 12:41:28,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-05-12 12:41:28,698 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:41:28,698 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:41:28,698 INFO L85 PathProgramCache]: Analyzing trace with hash 6174451, now seen corresponding path program 6 times [2024-05-12 12:41:28,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:41:28,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147437702] [2024-05-12 12:41:28,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:41:28,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:41:28,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:41:28,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:41:28,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:41:28,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147437702] [2024-05-12 12:41:28,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147437702] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:41:28,850 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:41:28,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 12:41:28,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422078741] [2024-05-12 12:41:28,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:41:28,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 12:41:28,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:41:28,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 12:41:28,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-05-12 12:41:28,890 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 12:41:28,890 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 440 transitions, 7861 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:41:28,890 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:41:28,890 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 12:41:28,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:41:31,385 INFO L124 PetriNetUnfolderBase]: 7441/12636 cut-off events. [2024-05-12 12:41:31,386 INFO L125 PetriNetUnfolderBase]: For 723050/723163 co-relation queries the response was YES. [2024-05-12 12:41:31,613 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74750 conditions, 12636 events. 7441/12636 cut-off events. For 723050/723163 co-relation queries the response was YES. Maximal size of possible extension queue 801. Compared 100754 event pairs, 2949 based on Foata normal form. 68/12156 useless extension candidates. Maximal degree in co-relation 74608. Up to 9187 conditions per place. [2024-05-12 12:41:31,666 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 232 selfloop transitions, 233 changer transitions 0/478 dead transitions. [2024-05-12 12:41:31,666 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 478 transitions, 9317 flow [2024-05-12 12:41:31,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 12:41:31,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 12:41:31,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 226 transitions. [2024-05-12 12:41:31,668 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6141304347826086 [2024-05-12 12:41:31,669 INFO L175 Difference]: Start difference. First operand has 308 places, 440 transitions, 7861 flow. Second operand 8 states and 226 transitions. [2024-05-12 12:41:31,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 478 transitions, 9317 flow [2024-05-12 12:41:34,072 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 478 transitions, 8826 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-05-12 12:41:34,079 INFO L231 Difference]: Finished difference. Result has 310 places, 442 transitions, 7915 flow [2024-05-12 12:41:34,079 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=7370, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=440, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=231, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7915, PETRI_PLACES=310, PETRI_TRANSITIONS=442} [2024-05-12 12:41:34,079 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 260 predicate places. [2024-05-12 12:41:34,080 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 442 transitions, 7915 flow [2024-05-12 12:41:34,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:41:34,080 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:41:34,080 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] [2024-05-12 12:41:34,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-05-12 12:41:34,080 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:41:34,081 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:41:34,081 INFO L85 PathProgramCache]: Analyzing trace with hash -259127603, now seen corresponding path program 1 times [2024-05-12 12:41:34,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:41:34,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493808890] [2024-05-12 12:41:34,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:41:34,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:41:34,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:41:34,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:41:34,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:41:34,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493808890] [2024-05-12 12:41:34,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493808890] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:41:34,240 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:41:34,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 12:41:34,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918153960] [2024-05-12 12:41:34,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:41:34,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 12:41:34,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:41:34,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 12:41:34,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-05-12 12:41:34,289 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 12:41:34,289 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 442 transitions, 7915 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:41:34,289 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:41:34,289 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 12:41:34,289 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:41:36,930 INFO L124 PetriNetUnfolderBase]: 7968/13509 cut-off events. [2024-05-12 12:41:36,930 INFO L125 PetriNetUnfolderBase]: For 802196/802309 co-relation queries the response was YES. [2024-05-12 12:41:37,100 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80942 conditions, 13509 events. 7968/13509 cut-off events. For 802196/802309 co-relation queries the response was YES. Maximal size of possible extension queue 883. Compared 109460 event pairs, 3166 based on Foata normal form. 68/13013 useless extension candidates. Maximal degree in co-relation 80799. Up to 9167 conditions per place. [2024-05-12 12:41:37,263 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 244 selfloop transitions, 226 changer transitions 0/483 dead transitions. [2024-05-12 12:41:37,263 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 483 transitions, 9597 flow [2024-05-12 12:41:37,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 12:41:37,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 12:41:37,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 226 transitions. [2024-05-12 12:41:37,272 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6141304347826086 [2024-05-12 12:41:37,272 INFO L175 Difference]: Start difference. First operand has 310 places, 442 transitions, 7915 flow. Second operand 8 states and 226 transitions. [2024-05-12 12:41:37,272 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 483 transitions, 9597 flow [2024-05-12 12:41:40,196 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 483 transitions, 9088 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-05-12 12:41:40,203 INFO L231 Difference]: Finished difference. Result has 313 places, 446 transitions, 8011 flow [2024-05-12 12:41:40,203 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=7406, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=442, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=223, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8011, PETRI_PLACES=313, PETRI_TRANSITIONS=446} [2024-05-12 12:41:40,203 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 263 predicate places. [2024-05-12 12:41:40,203 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 446 transitions, 8011 flow [2024-05-12 12:41:40,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:41:40,203 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:41:40,203 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] [2024-05-12 12:41:40,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-05-12 12:41:40,204 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:41:40,204 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:41:40,204 INFO L85 PathProgramCache]: Analyzing trace with hash -1842660421, now seen corresponding path program 6 times [2024-05-12 12:41:40,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:41:40,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920492110] [2024-05-12 12:41:40,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:41:40,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:41:40,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:41:40,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:41:40,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:41:40,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920492110] [2024-05-12 12:41:40,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920492110] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:41:40,312 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:41:40,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 12:41:40,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206342639] [2024-05-12 12:41:40,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:41:40,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 12:41:40,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:41:40,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 12:41:40,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-05-12 12:41:40,347 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 12:41:40,347 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 446 transitions, 8011 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:41:40,347 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:41:40,347 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 12:41:40,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:41:43,165 INFO L124 PetriNetUnfolderBase]: 7965/13509 cut-off events. [2024-05-12 12:41:43,165 INFO L125 PetriNetUnfolderBase]: For 703582/703745 co-relation queries the response was YES. [2024-05-12 12:41:43,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80877 conditions, 13509 events. 7965/13509 cut-off events. For 703582/703745 co-relation queries the response was YES. Maximal size of possible extension queue 883. Compared 109746 event pairs, 3409 based on Foata normal form. 42/12994 useless extension candidates. Maximal degree in co-relation 80732. Up to 11610 conditions per place. [2024-05-12 12:41:43,373 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 205 selfloop transitions, 250 changer transitions 0/468 dead transitions. [2024-05-12 12:41:43,373 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 468 transitions, 9493 flow [2024-05-12 12:41:43,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 12:41:43,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 12:41:43,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 210 transitions. [2024-05-12 12:41:43,374 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5706521739130435 [2024-05-12 12:41:43,374 INFO L175 Difference]: Start difference. First operand has 313 places, 446 transitions, 8011 flow. Second operand 8 states and 210 transitions. [2024-05-12 12:41:43,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 468 transitions, 9493 flow [2024-05-12 12:41:45,728 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 468 transitions, 9167 flow, removed 26 selfloop flow, removed 4 redundant places. [2024-05-12 12:41:45,734 INFO L231 Difference]: Finished difference. Result has 317 places, 447 transitions, 8215 flow [2024-05-12 12:41:45,735 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=7685, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=446, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=249, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8215, PETRI_PLACES=317, PETRI_TRANSITIONS=447} [2024-05-12 12:41:45,735 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 267 predicate places. [2024-05-12 12:41:45,735 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 447 transitions, 8215 flow [2024-05-12 12:41:45,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:41:45,735 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:41:45,735 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] [2024-05-12 12:41:45,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-05-12 12:41:45,735 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:41:45,736 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:41:45,736 INFO L85 PathProgramCache]: Analyzing trace with hash 355347473, now seen corresponding path program 7 times [2024-05-12 12:41:45,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:41:45,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018264502] [2024-05-12 12:41:45,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:41:45,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:41:45,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:41:45,842 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:41:45,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:41:45,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018264502] [2024-05-12 12:41:45,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018264502] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:41:45,843 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:41:45,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 12:41:45,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760126954] [2024-05-12 12:41:45,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:41:45,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 12:41:45,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:41:45,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 12:41:45,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-05-12 12:41:45,899 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 12:41:45,900 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 447 transitions, 8215 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:41:45,900 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:41:45,900 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 12:41:45,900 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:41:48,874 INFO L124 PetriNetUnfolderBase]: 7972/13521 cut-off events. [2024-05-12 12:41:48,874 INFO L125 PetriNetUnfolderBase]: For 706844/706992 co-relation queries the response was YES. [2024-05-12 12:41:49,118 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80997 conditions, 13521 events. 7972/13521 cut-off events. For 706844/706992 co-relation queries the response was YES. Maximal size of possible extension queue 883. Compared 110014 event pairs, 3409 based on Foata normal form. 41/12999 useless extension candidates. Maximal degree in co-relation 80850. Up to 11616 conditions per place. [2024-05-12 12:41:49,166 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 195 selfloop transitions, 263 changer transitions 0/471 dead transitions. [2024-05-12 12:41:49,166 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 471 transitions, 9756 flow [2024-05-12 12:41:49,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 12:41:49,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 12:41:49,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 213 transitions. [2024-05-12 12:41:49,167 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5788043478260869 [2024-05-12 12:41:49,167 INFO L175 Difference]: Start difference. First operand has 317 places, 447 transitions, 8215 flow. Second operand 8 states and 213 transitions. [2024-05-12 12:41:49,167 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 471 transitions, 9756 flow [2024-05-12 12:41:51,439 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 471 transitions, 9364 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-05-12 12:41:51,446 INFO L231 Difference]: Finished difference. Result has 320 places, 450 transitions, 8426 flow [2024-05-12 12:41:51,446 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=7829, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=447, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=260, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8426, PETRI_PLACES=320, PETRI_TRANSITIONS=450} [2024-05-12 12:41:51,446 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 270 predicate places. [2024-05-12 12:41:51,447 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 450 transitions, 8426 flow [2024-05-12 12:41:51,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:41:51,447 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:41:51,447 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:41:51,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-05-12 12:41:51,447 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:41:51,447 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:41:51,447 INFO L85 PathProgramCache]: Analyzing trace with hash 344699579, now seen corresponding path program 8 times [2024-05-12 12:41:51,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:41:51,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670358530] [2024-05-12 12:41:51,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:41:51,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:41:51,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:41:51,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:41:51,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:41:51,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670358530] [2024-05-12 12:41:51,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670358530] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:41:51,621 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:41:51,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 12:41:51,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31453561] [2024-05-12 12:41:51,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:41:51,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 12:41:51,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:41:51,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 12:41:51,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2024-05-12 12:41:51,647 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 12:41:51,647 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 450 transitions, 8426 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:41:51,647 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:41:51,647 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 12:41:51,647 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:41:54,399 INFO L124 PetriNetUnfolderBase]: 7969/13514 cut-off events. [2024-05-12 12:41:54,399 INFO L125 PetriNetUnfolderBase]: For 719659/719818 co-relation queries the response was YES. [2024-05-12 12:41:54,556 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81127 conditions, 13514 events. 7969/13514 cut-off events. For 719659/719818 co-relation queries the response was YES. Maximal size of possible extension queue 883. Compared 109957 event pairs, 3409 based on Foata normal form. 42/12993 useless extension candidates. Maximal degree in co-relation 80979. Up to 11614 conditions per place. [2024-05-12 12:41:54,611 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 195 selfloop transitions, 263 changer transitions 0/471 dead transitions. [2024-05-12 12:41:54,611 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 471 transitions, 9902 flow [2024-05-12 12:41:54,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 12:41:54,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 12:41:54,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 213 transitions. [2024-05-12 12:41:54,612 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5788043478260869 [2024-05-12 12:41:54,612 INFO L175 Difference]: Start difference. First operand has 320 places, 450 transitions, 8426 flow. Second operand 8 states and 213 transitions. [2024-05-12 12:41:54,612 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 471 transitions, 9902 flow [2024-05-12 12:41:57,096 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 471 transitions, 9455 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-05-12 12:41:57,103 INFO L231 Difference]: Finished difference. Result has 323 places, 450 transitions, 8511 flow [2024-05-12 12:41:57,103 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=7979, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=450, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=263, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8511, PETRI_PLACES=323, PETRI_TRANSITIONS=450} [2024-05-12 12:41:57,104 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 273 predicate places. [2024-05-12 12:41:57,104 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 450 transitions, 8511 flow [2024-05-12 12:41:57,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:41:57,104 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:41:57,104 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] [2024-05-12 12:41:57,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-05-12 12:41:57,104 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:41:57,105 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:41:57,105 INFO L85 PathProgramCache]: Analyzing trace with hash 1292048089, now seen corresponding path program 7 times [2024-05-12 12:41:57,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:41:57,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46102] [2024-05-12 12:41:57,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:41:57,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:41:57,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:41:57,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:41:57,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:41:57,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46102] [2024-05-12 12:41:57,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46102] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:41:57,299 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:41:57,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:41:57,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375460795] [2024-05-12 12:41:57,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:41:57,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 12:41:57,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:41:57,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 12:41:57,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-05-12 12:41:57,324 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 12:41:57,325 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 450 transitions, 8511 flow. Second operand has 7 states, 7 states have (on average 18.428571428571427) internal successors, (129), 7 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:41:57,325 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:41:57,325 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 12:41:57,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:41:59,935 INFO L124 PetriNetUnfolderBase]: 7966/13507 cut-off events. [2024-05-12 12:41:59,935 INFO L125 PetriNetUnfolderBase]: For 728615/728887 co-relation queries the response was YES. [2024-05-12 12:42:00,125 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81174 conditions, 13507 events. 7966/13507 cut-off events. For 728615/728887 co-relation queries the response was YES. Maximal size of possible extension queue 883. Compared 109802 event pairs, 3430 based on Foata normal form. 81/12980 useless extension candidates. Maximal degree in co-relation 81025. Up to 11975 conditions per place. [2024-05-12 12:42:00,175 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 347 selfloop transitions, 105 changer transitions 0/465 dead transitions. [2024-05-12 12:42:00,176 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 465 transitions, 9623 flow [2024-05-12 12:42:00,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 12:42:00,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 12:42:00,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-05-12 12:42:00,176 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5559006211180124 [2024-05-12 12:42:00,176 INFO L175 Difference]: Start difference. First operand has 323 places, 450 transitions, 8511 flow. Second operand 7 states and 179 transitions. [2024-05-12 12:42:00,176 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 465 transitions, 9623 flow [2024-05-12 12:42:02,694 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 465 transitions, 8913 flow, removed 19 selfloop flow, removed 8 redundant places. [2024-05-12 12:42:02,700 INFO L231 Difference]: Finished difference. Result has 322 places, 450 transitions, 8017 flow [2024-05-12 12:42:02,700 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=7801, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=450, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=345, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8017, PETRI_PLACES=322, PETRI_TRANSITIONS=450} [2024-05-12 12:42:02,701 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 272 predicate places. [2024-05-12 12:42:02,701 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 450 transitions, 8017 flow [2024-05-12 12:42:02,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.428571428571427) internal successors, (129), 7 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:42:02,701 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:42:02,701 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] [2024-05-12 12:42:02,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-05-12 12:42:02,701 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:42:02,702 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:42:02,702 INFO L85 PathProgramCache]: Analyzing trace with hash 1907400345, now seen corresponding path program 9 times [2024-05-12 12:42:02,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:42:02,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235026167] [2024-05-12 12:42:02,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:42:02,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:42:02,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:42:02,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:42:02,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:42:02,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235026167] [2024-05-12 12:42:02,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235026167] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:42:02,812 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:42:02,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 12:42:02,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050704162] [2024-05-12 12:42:02,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:42:02,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 12:42:02,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:42:02,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 12:42:02,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2024-05-12 12:42:02,842 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 12:42:02,842 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 450 transitions, 8017 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:42:02,842 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:42:02,842 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 12:42:02,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:42:05,612 INFO L124 PetriNetUnfolderBase]: 7963/13507 cut-off events. [2024-05-12 12:42:05,612 INFO L125 PetriNetUnfolderBase]: For 737690/737826 co-relation queries the response was YES. [2024-05-12 12:42:05,744 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80286 conditions, 13507 events. 7963/13507 cut-off events. For 737690/737826 co-relation queries the response was YES. Maximal size of possible extension queue 883. Compared 109804 event pairs, 3415 based on Foata normal form. 37/12981 useless extension candidates. Maximal degree in co-relation 80137. Up to 11610 conditions per place. [2024-05-12 12:42:05,793 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 205 selfloop transitions, 253 changer transitions 0/471 dead transitions. [2024-05-12 12:42:05,793 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 471 transitions, 9505 flow [2024-05-12 12:42:05,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 12:42:05,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 12:42:05,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 211 transitions. [2024-05-12 12:42:05,793 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5733695652173914 [2024-05-12 12:42:05,793 INFO L175 Difference]: Start difference. First operand has 322 places, 450 transitions, 8017 flow. Second operand 8 states and 211 transitions. [2024-05-12 12:42:05,794 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 471 transitions, 9505 flow [2024-05-12 12:42:08,275 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 471 transitions, 9338 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-05-12 12:42:08,282 INFO L231 Difference]: Finished difference. Result has 326 places, 450 transitions, 8362 flow [2024-05-12 12:42:08,282 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=7850, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=450, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=253, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8362, PETRI_PLACES=326, PETRI_TRANSITIONS=450} [2024-05-12 12:42:08,283 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 276 predicate places. [2024-05-12 12:42:08,283 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 450 transitions, 8362 flow [2024-05-12 12:42:08,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:42:08,283 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:42:08,283 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] [2024-05-12 12:42:08,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-05-12 12:42:08,283 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:42:08,284 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:42:08,284 INFO L85 PathProgramCache]: Analyzing trace with hash -28865663, now seen corresponding path program 10 times [2024-05-12 12:42:08,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:42:08,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330547701] [2024-05-12 12:42:08,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:42:08,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:42:08,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:42:08,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:42:08,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:42:08,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330547701] [2024-05-12 12:42:08,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330547701] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:42:08,388 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:42:08,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 12:42:08,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017612836] [2024-05-12 12:42:08,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:42:08,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 12:42:08,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:42:08,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 12:42:08,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-05-12 12:42:08,414 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 12:42:08,415 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 450 transitions, 8362 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:42:08,415 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:42:08,415 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 12:42:08,415 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:42:11,093 INFO L124 PetriNetUnfolderBase]: 7960/13476 cut-off events. [2024-05-12 12:42:11,093 INFO L125 PetriNetUnfolderBase]: For 745952/745952 co-relation queries the response was YES. [2024-05-12 12:42:11,252 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80879 conditions, 13476 events. 7960/13476 cut-off events. For 745952/745952 co-relation queries the response was YES. Maximal size of possible extension queue 883. Compared 109382 event pairs, 3363 based on Foata normal form. 1/12848 useless extension candidates. Maximal degree in co-relation 80728. Up to 12212 conditions per place. [2024-05-12 12:42:11,307 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 404 selfloop transitions, 50 changer transitions 0/467 dead transitions. [2024-05-12 12:42:11,307 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 467 transitions, 9486 flow [2024-05-12 12:42:11,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 12:42:11,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 12:42:11,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 219 transitions. [2024-05-12 12:42:11,310 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5289855072463768 [2024-05-12 12:42:11,310 INFO L175 Difference]: Start difference. First operand has 326 places, 450 transitions, 8362 flow. Second operand 9 states and 219 transitions. [2024-05-12 12:42:11,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 467 transitions, 9486 flow [2024-05-12 12:42:14,752 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 467 transitions, 8616 flow, removed 21 selfloop flow, removed 9 redundant places. [2024-05-12 12:42:14,758 INFO L231 Difference]: Finished difference. Result has 326 places, 450 transitions, 7598 flow [2024-05-12 12:42:14,759 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=7492, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=450, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=400, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7598, PETRI_PLACES=326, PETRI_TRANSITIONS=450} [2024-05-12 12:42:14,759 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 276 predicate places. [2024-05-12 12:42:14,759 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 450 transitions, 7598 flow [2024-05-12 12:42:14,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:42:14,759 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:42:14,759 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] [2024-05-12 12:42:14,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-05-12 12:42:14,760 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:42:14,760 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:42:14,760 INFO L85 PathProgramCache]: Analyzing trace with hash -383593469, now seen corresponding path program 8 times [2024-05-12 12:42:14,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:42:14,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128037450] [2024-05-12 12:42:14,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:42:14,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:42:14,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:42:14,857 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:42:14,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:42:14,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128037450] [2024-05-12 12:42:14,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128037450] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:42:14,858 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:42:14,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 12:42:14,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21355564] [2024-05-12 12:42:14,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:42:14,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 12:42:14,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:42:14,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 12:42:14,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-05-12 12:42:14,880 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 12:42:14,887 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 450 transitions, 7598 flow. Second operand has 6 states, 6 states have (on average 18.833333333333332) internal successors, (113), 6 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:42:14,887 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:42:14,887 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 12:42:14,887 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:42:17,603 INFO L124 PetriNetUnfolderBase]: 7965/13491 cut-off events. [2024-05-12 12:42:17,603 INFO L125 PetriNetUnfolderBase]: For 748840/748878 co-relation queries the response was YES. [2024-05-12 12:42:17,743 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79912 conditions, 13491 events. 7965/13491 cut-off events. For 748840/748878 co-relation queries the response was YES. Maximal size of possible extension queue 883. Compared 109530 event pairs, 3372 based on Foata normal form. 32/12895 useless extension candidates. Maximal degree in co-relation 79760. Up to 11998 conditions per place. [2024-05-12 12:42:17,789 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 366 selfloop transitions, 97 changer transitions 0/476 dead transitions. [2024-05-12 12:42:17,789 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 476 transitions, 8841 flow [2024-05-12 12:42:17,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 12:42:17,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 12:42:17,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 172 transitions. [2024-05-12 12:42:17,790 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6231884057971014 [2024-05-12 12:42:17,790 INFO L175 Difference]: Start difference. First operand has 326 places, 450 transitions, 7598 flow. Second operand 6 states and 172 transitions. [2024-05-12 12:42:17,790 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 476 transitions, 8841 flow [2024-05-12 12:42:21,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 476 transitions, 8728 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-05-12 12:42:21,376 INFO L231 Difference]: Finished difference. Result has 325 places, 453 transitions, 7776 flow [2024-05-12 12:42:21,376 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=7485, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=450, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=356, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=7776, PETRI_PLACES=325, PETRI_TRANSITIONS=453} [2024-05-12 12:42:21,376 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 275 predicate places. [2024-05-12 12:42:21,377 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 453 transitions, 7776 flow [2024-05-12 12:42:21,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.833333333333332) internal successors, (113), 6 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:42:21,377 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:42:21,377 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] [2024-05-12 12:42:21,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-05-12 12:42:21,377 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:42:21,377 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:42:21,377 INFO L85 PathProgramCache]: Analyzing trace with hash -892242215, now seen corresponding path program 11 times [2024-05-12 12:42:21,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:42:21,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055423283] [2024-05-12 12:42:21,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:42:21,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:42:21,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:42:21,510 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:42:21,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:42:21,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055423283] [2024-05-12 12:42:21,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055423283] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:42:21,511 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:42:21,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 12:42:21,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569732925] [2024-05-12 12:42:21,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:42:21,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 12:42:21,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:42:21,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 12:42:21,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-05-12 12:42:21,552 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 12:42:21,552 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 453 transitions, 7776 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:42:21,552 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:42:21,552 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 12:42:21,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:42:24,401 INFO L124 PetriNetUnfolderBase]: 7962/13480 cut-off events. [2024-05-12 12:42:24,401 INFO L125 PetriNetUnfolderBase]: For 756620/756620 co-relation queries the response was YES. [2024-05-12 12:42:24,655 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80201 conditions, 13480 events. 7962/13480 cut-off events. For 756620/756620 co-relation queries the response was YES. Maximal size of possible extension queue 883. Compared 109400 event pairs, 3363 based on Foata normal form. 1/12851 useless extension candidates. Maximal degree in co-relation 80048. Up to 12215 conditions per place. [2024-05-12 12:42:24,703 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 406 selfloop transitions, 50 changer transitions 0/469 dead transitions. [2024-05-12 12:42:24,703 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 469 transitions, 8726 flow [2024-05-12 12:42:24,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 12:42:24,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 12:42:24,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 218 transitions. [2024-05-12 12:42:24,704 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5265700483091788 [2024-05-12 12:42:24,704 INFO L175 Difference]: Start difference. First operand has 325 places, 453 transitions, 7776 flow. Second operand 9 states and 218 transitions. [2024-05-12 12:42:24,704 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 469 transitions, 8726 flow [2024-05-12 12:42:28,462 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 469 transitions, 8508 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-05-12 12:42:28,468 INFO L231 Difference]: Finished difference. Result has 329 places, 453 transitions, 7664 flow [2024-05-12 12:42:28,469 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=7558, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=453, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=403, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7664, PETRI_PLACES=329, PETRI_TRANSITIONS=453} [2024-05-12 12:42:28,469 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 279 predicate places. [2024-05-12 12:42:28,469 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 453 transitions, 7664 flow [2024-05-12 12:42:28,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:42:28,469 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:42:28,469 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] [2024-05-12 12:42:28,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-05-12 12:42:28,469 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:42:28,470 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:42:28,470 INFO L85 PathProgramCache]: Analyzing trace with hash -383599049, now seen corresponding path program 9 times [2024-05-12 12:42:28,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:42:28,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359743502] [2024-05-12 12:42:28,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:42:28,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:42:28,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:42:28,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:42:28,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:42:28,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359743502] [2024-05-12 12:42:28,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359743502] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:42:28,567 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:42:28,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 12:42:28,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047604868] [2024-05-12 12:42:28,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:42:28,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 12:42:28,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:42:28,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 12:42:28,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-05-12 12:42:28,587 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 12:42:28,587 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 453 transitions, 7664 flow. Second operand has 6 states, 6 states have (on average 18.833333333333332) internal successors, (113), 6 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:42:28,587 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:42:28,587 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 12:42:28,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:42:31,218 INFO L124 PetriNetUnfolderBase]: 7956/13477 cut-off events. [2024-05-12 12:42:31,218 INFO L125 PetriNetUnfolderBase]: For 750941/750979 co-relation queries the response was YES. [2024-05-12 12:42:31,580 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79646 conditions, 13477 events. 7956/13477 cut-off events. For 750941/750979 co-relation queries the response was YES. Maximal size of possible extension queue 883. Compared 109341 event pairs, 3371 based on Foata normal form. 22/12871 useless extension candidates. Maximal degree in co-relation 79493. Up to 11988 conditions per place. [2024-05-12 12:42:31,629 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 367 selfloop transitions, 98 changer transitions 0/478 dead transitions. [2024-05-12 12:42:31,630 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 478 transitions, 8658 flow [2024-05-12 12:42:31,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 12:42:31,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 12:42:31,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 175 transitions. [2024-05-12 12:42:31,630 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6340579710144928 [2024-05-12 12:42:31,630 INFO L175 Difference]: Start difference. First operand has 329 places, 453 transitions, 7664 flow. Second operand 6 states and 175 transitions. [2024-05-12 12:42:31,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 478 transitions, 8658 flow