./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe006_pso.oepc_pso.opt_tso.oepc_tso.opt-thin000_pso.oepc_pso.opt_tso.oepc_tso.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2024-05-07_14-17-48.files/protection/safe006_pso.oepc_pso.opt_tso.oepc_tso.opt-thin000_pso.oepc_pso.opt_tso.oepc_tso.opt.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/safe006_pso.oepc_pso.opt_tso.oepc_tso.opt-thin000_pso.oepc_pso.opt_tso.oepc_tso.opt.i ./goblint.2024-05-07_14-17-48.files/protection/safe006_pso.oepc_pso.opt_tso.oepc_tso.opt-thin000_pso.oepc_pso.opt_tso.oepc_tso.opt.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 12:39:03,987 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-05-12 12:39:04,047 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-05-12 12:39:04,052 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-05-12 12:39:04,052 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-05-12 12:39:04,079 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-05-12 12:39:04,080 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-05-12 12:39:04,080 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-05-12 12:39:04,081 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-05-12 12:39:04,083 INFO L153 SettingsManager]: * Use memory slicer=true [2024-05-12 12:39:04,084 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-05-12 12:39:04,084 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-05-12 12:39:04,084 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-05-12 12:39:04,085 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-05-12 12:39:04,086 INFO L153 SettingsManager]: * Use SBE=true [2024-05-12 12:39:04,086 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-05-12 12:39:04,086 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-05-12 12:39:04,087 INFO L153 SettingsManager]: * sizeof long=4 [2024-05-12 12:39:04,087 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-05-12 12:39:04,087 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-05-12 12:39:04,087 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-05-12 12:39:04,088 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-05-12 12:39:04,088 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-05-12 12:39:04,088 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-05-12 12:39:04,088 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-05-12 12:39:04,089 INFO L153 SettingsManager]: * sizeof long double=12 [2024-05-12 12:39:04,089 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-05-12 12:39:04,089 INFO L153 SettingsManager]: * Use constant arrays=true [2024-05-12 12:39:04,089 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-05-12 12:39:04,090 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-05-12 12:39:04,091 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-05-12 12:39:04,091 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-05-12 12:39:04,091 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-05-12 12:39:04,091 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-05-12 12:39:04,091 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-05-12 12:39:04,091 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-05-12 12:39:04,092 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-05-12 12:39:04,092 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-05-12 12:39:04,092 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-05-12 12:39:04,092 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-05-12 12:39:04,092 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-05-12 12:39:04,093 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-05-12 12:39:04,093 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-05-12 12:39:04,093 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-05-12 12:39:04,279 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-05-12 12:39:04,299 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-05-12 12:39:04,301 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-05-12 12:39:04,302 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-05-12 12:39:04,302 INFO L274 PluginConnector]: Witness Parser initialized [2024-05-12 12:39:04,303 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-07_14-17-48.files/protection/safe006_pso.oepc_pso.opt_tso.oepc_tso.opt-thin000_pso.oepc_pso.opt_tso.oepc_tso.opt.yml/witness.yml [2024-05-12 12:39:04,426 INFO L270 PluginConnector]: Initializing CDTParser... [2024-05-12 12:39:04,427 INFO L274 PluginConnector]: CDTParser initialized [2024-05-12 12:39:04,428 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe006_pso.oepc_pso.opt_tso.oepc_tso.opt-thin000_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-05-12 12:39:05,430 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-05-12 12:39:05,668 INFO L384 CDTParser]: Found 1 translation units. [2024-05-12 12:39:05,668 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe006_pso.oepc_pso.opt_tso.oepc_tso.opt-thin000_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-05-12 12:39:05,678 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f1fc84c8e/0dcd6629bf294e62975aeb4cf6c49099/FLAG963d2030c [2024-05-12 12:39:05,688 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f1fc84c8e/0dcd6629bf294e62975aeb4cf6c49099 [2024-05-12 12:39:05,688 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-05-12 12:39:05,689 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-05-12 12:39:05,696 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-05-12 12:39:05,696 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-05-12 12:39:05,700 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-05-12 12:39:05,701 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 12.05 12:39:04" (1/2) ... [2024-05-12 12:39:05,702 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b4c3fe0 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 12:39:05, skipping insertion in model container [2024-05-12 12:39:05,702 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 12.05 12:39:04" (1/2) ... [2024-05-12 12:39:05,704 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@423976ec and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 12:39:05, skipping insertion in model container [2024-05-12 12:39:05,704 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.05 12:39:05" (2/2) ... [2024-05-12 12:39:05,706 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b4c3fe0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 12:39:05, skipping insertion in model container [2024-05-12 12:39:05,706 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.05 12:39:05" (2/2) ... [2024-05-12 12:39:05,707 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-05-12 12:39:05,735 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-05-12 12:39:05,736 INFO L97 edCorrectnessWitness]: Location invariant before [L764-L764] ((((! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1))) [2024-05-12 12:39:05,736 INFO L97 edCorrectnessWitness]: Location invariant before [L763-L763] ((((! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1))) [2024-05-12 12:39:05,736 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-05-12 12:39:05,736 INFO L106 edCorrectnessWitness]: ghost_update [L761-L761] multithreaded = 1; [2024-05-12 12:39:05,765 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-05-12 12:39:05,936 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/safe006_pso.oepc_pso.opt_tso.oepc_tso.opt-thin000_pso.oepc_pso.opt_tso.oepc_tso.opt.i[1017,1030] [2024-05-12 12:39:06,080 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-05-12 12:39:06,089 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local [2024-05-12 12:39:06,117 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/safe006_pso.oepc_pso.opt_tso.oepc_tso.opt-thin000_pso.oepc_pso.opt_tso.oepc_tso.opt.i[1017,1030] Start Parsing Local Start Parsing Local Start Parsing Local [2024-05-12 12:39:06,174 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-05-12 12:39:06,222 INFO L206 MainTranslator]: Completed translation [2024-05-12 12:39:06,222 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 12:39:06 WrapperNode [2024-05-12 12:39:06,223 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-05-12 12:39:06,223 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-05-12 12:39:06,224 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-05-12 12:39:06,224 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-05-12 12:39:06,229 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 12:39:06" (1/1) ... [2024-05-12 12:39:06,247 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 12:39:06" (1/1) ... [2024-05-12 12:39:06,262 INFO L138 Inliner]: procedures = 175, calls = 40, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 63 [2024-05-12 12:39:06,262 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-05-12 12:39:06,263 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-05-12 12:39:06,263 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-05-12 12:39:06,263 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-05-12 12:39:06,278 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 12:39:06" (1/1) ... [2024-05-12 12:39:06,278 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 12:39:06" (1/1) ... [2024-05-12 12:39:06,280 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 12:39:06" (1/1) ... [2024-05-12 12:39:06,291 INFO L175 MemorySlicer]: Split 4 memory accesses to 3 slices as follows [2, 1, 1]. 50 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 2 writes are split as follows [0, 1, 1]. [2024-05-12 12:39:06,291 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 12:39:06" (1/1) ... [2024-05-12 12:39:06,291 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 12:39:06" (1/1) ... [2024-05-12 12:39:06,296 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 12:39:06" (1/1) ... [2024-05-12 12:39:06,297 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 12:39:06" (1/1) ... [2024-05-12 12:39:06,298 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 12:39:06" (1/1) ... [2024-05-12 12:39:06,299 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 12:39:06" (1/1) ... [2024-05-12 12:39:06,301 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-05-12 12:39:06,302 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-05-12 12:39:06,302 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-05-12 12:39:06,302 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-05-12 12:39:06,303 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 12:39:06" (1/1) ... [2024-05-12 12:39:06,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-05-12 12:39:06,319 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 12:39:06,361 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 12:39:06,401 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 12:39:06,413 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-05-12 12:39:06,414 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-05-12 12:39:06,414 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-05-12 12:39:06,414 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-05-12 12:39:06,414 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-05-12 12:39:06,415 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-05-12 12:39:06,415 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-05-12 12:39:06,415 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-05-12 12:39:06,415 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-05-12 12:39:06,415 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-05-12 12:39:06,415 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-05-12 12:39:06,415 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-05-12 12:39:06,416 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-05-12 12:39:06,416 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-05-12 12:39:06,417 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-05-12 12:39:06,419 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-05-12 12:39:06,419 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-05-12 12:39:06,420 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 12:39:06,533 INFO L244 CfgBuilder]: Building ICFG [2024-05-12 12:39:06,534 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-05-12 12:39:06,679 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-05-12 12:39:06,679 INFO L293 CfgBuilder]: Performing block encoding [2024-05-12 12:39:06,738 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-05-12 12:39:06,742 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-05-12 12:39:06,743 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.05 12:39:06 BoogieIcfgContainer [2024-05-12 12:39:06,743 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-05-12 12:39:06,745 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-05-12 12:39:06,745 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-05-12 12:39:06,748 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-05-12 12:39:06,748 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 12.05 12:39:04" (1/4) ... [2024-05-12 12:39:06,750 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6cc345f2 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 12.05 12:39:06, skipping insertion in model container [2024-05-12 12:39:06,751 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.05 12:39:05" (2/4) ... [2024-05-12 12:39:06,751 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6cc345f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.05 12:39:06, skipping insertion in model container [2024-05-12 12:39:06,751 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 12:39:06" (3/4) ... [2024-05-12 12:39:06,751 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6cc345f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.05 12:39:06, skipping insertion in model container [2024-05-12 12:39:06,752 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.05 12:39:06" (4/4) ... [2024-05-12 12:39:06,753 INFO L112 eAbstractionObserver]: Analyzing ICFG safe006_pso.oepc_pso.opt_tso.oepc_tso.opt-thin000_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-05-12 12:39:06,769 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-05-12 12:39:06,769 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-05-12 12:39:06,770 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-05-12 12:39:06,816 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-05-12 12:39:06,846 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 41 places, 35 transitions, 78 flow [2024-05-12 12:39:06,879 INFO L124 PetriNetUnfolderBase]: 1/33 cut-off events. [2024-05-12 12:39:06,879 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-05-12 12:39:06,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40 conditions, 33 events. 1/33 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 40 event pairs, 0 based on Foata normal form. 0/29 useless extension candidates. Maximal degree in co-relation 31. Up to 2 conditions per place. [2024-05-12 12:39:06,882 INFO L82 GeneralOperation]: Start removeDead. Operand has 41 places, 35 transitions, 78 flow [2024-05-12 12:39:06,885 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 37 places, 30 transitions, 66 flow [2024-05-12 12:39:06,897 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-05-12 12:39:06,904 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;@239dd34b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-05-12 12:39:06,904 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2024-05-12 12:39:06,907 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-05-12 12:39:06,908 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-05-12 12:39:06,908 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-05-12 12:39:06,909 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:39:06,909 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-05-12 12:39:06,910 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 12:39:06,915 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:39:06,915 INFO L85 PathProgramCache]: Analyzing trace with hash 1392223833, now seen corresponding path program 1 times [2024-05-12 12:39:06,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:39:06,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913201191] [2024-05-12 12:39:06,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:39:06,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:39:07,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:39:07,304 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 12:39:07,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:39:07,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913201191] [2024-05-12 12:39:07,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913201191] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:39:07,306 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:39:07,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-05-12 12:39:07,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633563603] [2024-05-12 12:39:07,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:39:07,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-05-12 12:39:07,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:39:07,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-05-12 12:39:07,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-05-12 12:39:07,368 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 35 [2024-05-12 12:39:07,370 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 30 transitions, 66 flow. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 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 12:39:07,370 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:39:07,371 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 35 [2024-05-12 12:39:07,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:39:07,443 INFO L124 PetriNetUnfolderBase]: 114/244 cut-off events. [2024-05-12 12:39:07,444 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-05-12 12:39:07,445 INFO L83 FinitePrefix]: Finished finitePrefix Result has 469 conditions, 244 events. 114/244 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1044 event pairs, 45 based on Foata normal form. 1/240 useless extension candidates. Maximal degree in co-relation 455. Up to 202 conditions per place. [2024-05-12 12:39:07,447 INFO L140 encePairwiseOnDemand]: 30/35 looper letters, 23 selfloop transitions, 3 changer transitions 0/38 dead transitions. [2024-05-12 12:39:07,448 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 38 transitions, 137 flow [2024-05-12 12:39:07,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-05-12 12:39:07,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-05-12 12:39:07,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 73 transitions. [2024-05-12 12:39:07,459 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6952380952380952 [2024-05-12 12:39:07,461 INFO L175 Difference]: Start difference. First operand has 37 places, 30 transitions, 66 flow. Second operand 3 states and 73 transitions. [2024-05-12 12:39:07,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 38 transitions, 137 flow [2024-05-12 12:39:07,463 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 38 transitions, 134 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-05-12 12:39:07,466 INFO L231 Difference]: Finished difference. Result has 38 places, 32 transitions, 85 flow [2024-05-12 12:39:07,467 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=85, PETRI_PLACES=38, PETRI_TRANSITIONS=32} [2024-05-12 12:39:07,471 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 1 predicate places. [2024-05-12 12:39:07,471 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 32 transitions, 85 flow [2024-05-12 12:39:07,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 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 12:39:07,472 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:39:07,472 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:39:07,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-05-12 12:39:07,472 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 12:39:07,473 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:39:07,473 INFO L85 PathProgramCache]: Analyzing trace with hash -758741142, now seen corresponding path program 1 times [2024-05-12 12:39:07,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:39:07,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621484290] [2024-05-12 12:39:07,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:39:07,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:39:07,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:39:07,662 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 12:39:07,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:39:07,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621484290] [2024-05-12 12:39:07,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621484290] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:39:07,664 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:39:07,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-05-12 12:39:07,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141966806] [2024-05-12 12:39:07,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:39:07,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-05-12 12:39:07,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:39:07,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-05-12 12:39:07,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-05-12 12:39:07,691 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2024-05-12 12:39:07,692 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 32 transitions, 85 flow. Second operand has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:39:07,692 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:39:07,692 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2024-05-12 12:39:07,693 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:39:07,847 INFO L124 PetriNetUnfolderBase]: 179/364 cut-off events. [2024-05-12 12:39:07,847 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2024-05-12 12:39:07,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 790 conditions, 364 events. 179/364 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1701 event pairs, 43 based on Foata normal form. 2/364 useless extension candidates. Maximal degree in co-relation 775. Up to 284 conditions per place. [2024-05-12 12:39:07,853 INFO L140 encePairwiseOnDemand]: 29/35 looper letters, 34 selfloop transitions, 5 changer transitions 0/49 dead transitions. [2024-05-12 12:39:07,854 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 49 transitions, 204 flow [2024-05-12 12:39:07,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-05-12 12:39:07,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-05-12 12:39:07,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 91 transitions. [2024-05-12 12:39:07,857 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.65 [2024-05-12 12:39:07,857 INFO L175 Difference]: Start difference. First operand has 38 places, 32 transitions, 85 flow. Second operand 4 states and 91 transitions. [2024-05-12 12:39:07,858 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 49 transitions, 204 flow [2024-05-12 12:39:07,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 49 transitions, 200 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-05-12 12:39:07,861 INFO L231 Difference]: Finished difference. Result has 42 places, 36 transitions, 118 flow [2024-05-12 12:39:07,862 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=118, PETRI_PLACES=42, PETRI_TRANSITIONS=36} [2024-05-12 12:39:07,864 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 5 predicate places. [2024-05-12 12:39:07,865 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 36 transitions, 118 flow [2024-05-12 12:39:07,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:39:07,865 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:39:07,868 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:39:07,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-05-12 12:39:07,869 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 12:39:07,869 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:39:07,870 INFO L85 PathProgramCache]: Analyzing trace with hash -61574009, now seen corresponding path program 1 times [2024-05-12 12:39:07,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:39:07,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553181305] [2024-05-12 12:39:07,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:39:07,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:39:07,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:39:08,064 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 12:39:08,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:39:08,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553181305] [2024-05-12 12:39:08,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553181305] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:39:08,065 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:39:08,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 12:39:08,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104259802] [2024-05-12 12:39:08,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:39:08,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 12:39:08,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:39:08,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 12:39:08,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-05-12 12:39:08,101 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2024-05-12 12:39:08,102 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 36 transitions, 118 flow. Second operand has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:39:08,103 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:39:08,103 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2024-05-12 12:39:08,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:39:08,191 INFO L124 PetriNetUnfolderBase]: 175/356 cut-off events. [2024-05-12 12:39:08,191 INFO L125 PetriNetUnfolderBase]: For 137/140 co-relation queries the response was YES. [2024-05-12 12:39:08,192 INFO L83 FinitePrefix]: Finished finitePrefix Result has 856 conditions, 356 events. 175/356 cut-off events. For 137/140 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1652 event pairs, 19 based on Foata normal form. 6/360 useless extension candidates. Maximal degree in co-relation 838. Up to 250 conditions per place. [2024-05-12 12:39:08,193 INFO L140 encePairwiseOnDemand]: 29/35 looper letters, 36 selfloop transitions, 6 changer transitions 0/52 dead transitions. [2024-05-12 12:39:08,193 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 52 transitions, 234 flow [2024-05-12 12:39:08,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 12:39:08,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 12:39:08,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 107 transitions. [2024-05-12 12:39:08,195 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6114285714285714 [2024-05-12 12:39:08,195 INFO L175 Difference]: Start difference. First operand has 42 places, 36 transitions, 118 flow. Second operand 5 states and 107 transitions. [2024-05-12 12:39:08,195 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 52 transitions, 234 flow [2024-05-12 12:39:08,196 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 52 transitions, 234 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-05-12 12:39:08,197 INFO L231 Difference]: Finished difference. Result has 46 places, 35 transitions, 128 flow [2024-05-12 12:39:08,197 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=128, PETRI_PLACES=46, PETRI_TRANSITIONS=35} [2024-05-12 12:39:08,198 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 9 predicate places. [2024-05-12 12:39:08,198 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 35 transitions, 128 flow [2024-05-12 12:39:08,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:39:08,198 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:39:08,198 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:39:08,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-05-12 12:39:08,199 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 12:39:08,199 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:39:08,199 INFO L85 PathProgramCache]: Analyzing trace with hash 242451970, now seen corresponding path program 1 times [2024-05-12 12:39:08,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:39:08,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114484769] [2024-05-12 12:39:08,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:39:08,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:39:08,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:39:08,354 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 12:39:08,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:39:08,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114484769] [2024-05-12 12:39:08,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114484769] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:39:08,355 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:39:08,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-05-12 12:39:08,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123594071] [2024-05-12 12:39:08,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:39:08,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-05-12 12:39:08,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:39:08,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-05-12 12:39:08,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-05-12 12:39:08,387 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2024-05-12 12:39:08,388 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 35 transitions, 128 flow. Second operand has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:39:08,389 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:39:08,389 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2024-05-12 12:39:08,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:39:08,448 INFO L124 PetriNetUnfolderBase]: 173/349 cut-off events. [2024-05-12 12:39:08,448 INFO L125 PetriNetUnfolderBase]: For 235/235 co-relation queries the response was YES. [2024-05-12 12:39:08,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 906 conditions, 349 events. 173/349 cut-off events. For 235/235 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1598 event pairs, 35 based on Foata normal form. 1/349 useless extension candidates. Maximal degree in co-relation 885. Up to 285 conditions per place. [2024-05-12 12:39:08,450 INFO L140 encePairwiseOnDemand]: 30/35 looper letters, 34 selfloop transitions, 5 changer transitions 0/49 dead transitions. [2024-05-12 12:39:08,451 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 49 transitions, 243 flow [2024-05-12 12:39:08,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-05-12 12:39:08,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-05-12 12:39:08,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 86 transitions. [2024-05-12 12:39:08,452 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6142857142857143 [2024-05-12 12:39:08,452 INFO L175 Difference]: Start difference. First operand has 46 places, 35 transitions, 128 flow. Second operand 4 states and 86 transitions. [2024-05-12 12:39:08,453 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 49 transitions, 243 flow [2024-05-12 12:39:08,455 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 49 transitions, 224 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-05-12 12:39:08,456 INFO L231 Difference]: Finished difference. Result has 47 places, 39 transitions, 146 flow [2024-05-12 12:39:08,457 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=146, PETRI_PLACES=47, PETRI_TRANSITIONS=39} [2024-05-12 12:39:08,458 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 10 predicate places. [2024-05-12 12:39:08,458 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 39 transitions, 146 flow [2024-05-12 12:39:08,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:39:08,458 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:39:08,458 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:39:08,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-05-12 12:39:08,459 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 12:39:08,459 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:39:08,459 INFO L85 PathProgramCache]: Analyzing trace with hash 1802349263, now seen corresponding path program 1 times [2024-05-12 12:39:08,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:39:08,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93542300] [2024-05-12 12:39:08,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:39:08,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:39:08,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:39:08,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:39:08,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:39:08,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93542300] [2024-05-12 12:39:08,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93542300] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:39:08,565 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:39:08,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 12:39:08,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826755134] [2024-05-12 12:39:08,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:39:08,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 12:39:08,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:39:08,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 12:39:08,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-05-12 12:39:08,598 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2024-05-12 12:39:08,598 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 39 transitions, 146 flow. Second operand has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 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 12:39:08,598 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:39:08,598 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2024-05-12 12:39:08,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:39:08,662 INFO L124 PetriNetUnfolderBase]: 180/379 cut-off events. [2024-05-12 12:39:08,662 INFO L125 PetriNetUnfolderBase]: For 305/308 co-relation queries the response was YES. [2024-05-12 12:39:08,663 INFO L83 FinitePrefix]: Finished finitePrefix Result has 999 conditions, 379 events. 180/379 cut-off events. For 305/308 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1834 event pairs, 47 based on Foata normal form. 3/380 useless extension candidates. Maximal degree in co-relation 977. Up to 251 conditions per place. [2024-05-12 12:39:08,664 INFO L140 encePairwiseOnDemand]: 29/35 looper letters, 38 selfloop transitions, 11 changer transitions 0/59 dead transitions. [2024-05-12 12:39:08,664 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 59 transitions, 304 flow [2024-05-12 12:39:08,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 12:39:08,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 12:39:08,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 110 transitions. [2024-05-12 12:39:08,665 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6285714285714286 [2024-05-12 12:39:08,665 INFO L175 Difference]: Start difference. First operand has 47 places, 39 transitions, 146 flow. Second operand 5 states and 110 transitions. [2024-05-12 12:39:08,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 59 transitions, 304 flow [2024-05-12 12:39:08,666 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 59 transitions, 304 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-05-12 12:39:08,667 INFO L231 Difference]: Finished difference. Result has 52 places, 43 transitions, 193 flow [2024-05-12 12:39:08,668 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=193, PETRI_PLACES=52, PETRI_TRANSITIONS=43} [2024-05-12 12:39:08,668 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 15 predicate places. [2024-05-12 12:39:08,668 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 43 transitions, 193 flow [2024-05-12 12:39:08,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 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 12:39:08,669 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:39:08,669 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:39:08,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-05-12 12:39:08,669 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 12:39:08,670 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:39:08,670 INFO L85 PathProgramCache]: Analyzing trace with hash 1577995617, now seen corresponding path program 1 times [2024-05-12 12:39:08,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:39:08,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76166983] [2024-05-12 12:39:08,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:39:08,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:39:08,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:39:08,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:39:08,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:39:08,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76166983] [2024-05-12 12:39:08,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76166983] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:39:08,786 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:39:08,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 12:39:08,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619078719] [2024-05-12 12:39:08,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:39:08,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 12:39:08,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:39:08,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 12:39:08,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-05-12 12:39:08,811 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2024-05-12 12:39:08,811 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 43 transitions, 193 flow. Second operand has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 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 12:39:08,811 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:39:08,811 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2024-05-12 12:39:08,811 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:39:08,878 INFO L124 PetriNetUnfolderBase]: 187/390 cut-off events. [2024-05-12 12:39:08,878 INFO L125 PetriNetUnfolderBase]: For 510/513 co-relation queries the response was YES. [2024-05-12 12:39:08,879 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1130 conditions, 390 events. 187/390 cut-off events. For 510/513 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1883 event pairs, 46 based on Foata normal form. 3/391 useless extension candidates. Maximal degree in co-relation 1105. Up to 276 conditions per place. [2024-05-12 12:39:08,880 INFO L140 encePairwiseOnDemand]: 29/35 looper letters, 35 selfloop transitions, 9 changer transitions 0/54 dead transitions. [2024-05-12 12:39:08,880 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 54 transitions, 309 flow [2024-05-12 12:39:08,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-05-12 12:39:08,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-05-12 12:39:08,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 88 transitions. [2024-05-12 12:39:08,883 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6285714285714286 [2024-05-12 12:39:08,883 INFO L175 Difference]: Start difference. First operand has 52 places, 43 transitions, 193 flow. Second operand 4 states and 88 transitions. [2024-05-12 12:39:08,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 54 transitions, 309 flow [2024-05-12 12:39:08,888 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 54 transitions, 300 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-05-12 12:39:08,889 INFO L231 Difference]: Finished difference. Result has 55 places, 45 transitions, 222 flow [2024-05-12 12:39:08,889 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=184, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=222, PETRI_PLACES=55, PETRI_TRANSITIONS=45} [2024-05-12 12:39:08,892 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 18 predicate places. [2024-05-12 12:39:08,892 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 45 transitions, 222 flow [2024-05-12 12:39:08,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 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 12:39:08,892 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:39:08,892 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:39:08,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-05-12 12:39:08,893 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 12:39:08,894 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:39:08,894 INFO L85 PathProgramCache]: Analyzing trace with hash 1577995431, now seen corresponding path program 2 times [2024-05-12 12:39:08,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:39:08,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919257741] [2024-05-12 12:39:08,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:39:08,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:39:08,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:39:09,016 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 12:39:09,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:39:09,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919257741] [2024-05-12 12:39:09,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919257741] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:39:09,017 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:39:09,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 12:39:09,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218036198] [2024-05-12 12:39:09,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:39:09,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 12:39:09,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:39:09,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 12:39:09,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-05-12 12:39:09,045 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2024-05-12 12:39:09,046 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 45 transitions, 222 flow. Second operand has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 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 12:39:09,046 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:39:09,046 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2024-05-12 12:39:09,046 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:39:09,128 INFO L124 PetriNetUnfolderBase]: 185/387 cut-off events. [2024-05-12 12:39:09,128 INFO L125 PetriNetUnfolderBase]: For 648/651 co-relation queries the response was YES. [2024-05-12 12:39:09,129 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1211 conditions, 387 events. 185/387 cut-off events. For 648/651 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1871 event pairs, 46 based on Foata normal form. 3/388 useless extension candidates. Maximal degree in co-relation 1184. Up to 267 conditions per place. [2024-05-12 12:39:09,130 INFO L140 encePairwiseOnDemand]: 29/35 looper letters, 38 selfloop transitions, 9 changer transitions 0/57 dead transitions. [2024-05-12 12:39:09,130 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 57 transitions, 344 flow [2024-05-12 12:39:09,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-05-12 12:39:09,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-05-12 12:39:09,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 91 transitions. [2024-05-12 12:39:09,132 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.65 [2024-05-12 12:39:09,132 INFO L175 Difference]: Start difference. First operand has 55 places, 45 transitions, 222 flow. Second operand 4 states and 91 transitions. [2024-05-12 12:39:09,132 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 57 transitions, 344 flow [2024-05-12 12:39:09,135 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 57 transitions, 324 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-05-12 12:39:09,136 INFO L231 Difference]: Finished difference. Result has 57 places, 45 transitions, 228 flow [2024-05-12 12:39:09,136 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=228, PETRI_PLACES=57, PETRI_TRANSITIONS=45} [2024-05-12 12:39:09,137 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 20 predicate places. [2024-05-12 12:39:09,137 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 45 transitions, 228 flow [2024-05-12 12:39:09,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 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 12:39:09,138 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:39:09,138 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:39:09,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-05-12 12:39:09,138 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 12:39:09,139 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:39:09,139 INFO L85 PathProgramCache]: Analyzing trace with hash 288201151, now seen corresponding path program 2 times [2024-05-12 12:39:09,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:39:09,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470875382] [2024-05-12 12:39:09,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:39:09,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:39:09,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:39:09,265 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:39:09,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:39:09,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470875382] [2024-05-12 12:39:09,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470875382] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:39:09,266 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:39:09,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 12:39:09,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175241884] [2024-05-12 12:39:09,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:39:09,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 12:39:09,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:39:09,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 12:39:09,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-05-12 12:39:09,287 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2024-05-12 12:39:09,287 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 45 transitions, 228 flow. Second operand has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 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 12:39:09,287 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:39:09,287 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2024-05-12 12:39:09,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:39:09,347 INFO L124 PetriNetUnfolderBase]: 183/384 cut-off events. [2024-05-12 12:39:09,347 INFO L125 PetriNetUnfolderBase]: For 728/731 co-relation queries the response was YES. [2024-05-12 12:39:09,348 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1199 conditions, 384 events. 183/384 cut-off events. For 728/731 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1847 event pairs, 46 based on Foata normal form. 3/385 useless extension candidates. Maximal degree in co-relation 1171. Up to 263 conditions per place. [2024-05-12 12:39:09,349 INFO L140 encePairwiseOnDemand]: 29/35 looper letters, 38 selfloop transitions, 11 changer transitions 0/59 dead transitions. [2024-05-12 12:39:09,349 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 59 transitions, 362 flow [2024-05-12 12:39:09,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 12:39:09,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 12:39:09,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 106 transitions. [2024-05-12 12:39:09,352 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6057142857142858 [2024-05-12 12:39:09,352 INFO L175 Difference]: Start difference. First operand has 57 places, 45 transitions, 228 flow. Second operand 5 states and 106 transitions. [2024-05-12 12:39:09,352 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 59 transitions, 362 flow [2024-05-12 12:39:09,353 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 59 transitions, 344 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-05-12 12:39:09,354 INFO L231 Difference]: Finished difference. Result has 59 places, 47 transitions, 251 flow [2024-05-12 12:39:09,354 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=251, PETRI_PLACES=59, PETRI_TRANSITIONS=47} [2024-05-12 12:39:09,355 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 22 predicate places. [2024-05-12 12:39:09,355 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 47 transitions, 251 flow [2024-05-12 12:39:09,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 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 12:39:09,355 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:39:09,355 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:39:09,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-05-12 12:39:09,356 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 12:39:09,356 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:39:09,356 INFO L85 PathProgramCache]: Analyzing trace with hash 288210079, now seen corresponding path program 1 times [2024-05-12 12:39:09,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:39:09,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005543618] [2024-05-12 12:39:09,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:39:09,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:39:09,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:39:09,458 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 12:39:09,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:39:09,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005543618] [2024-05-12 12:39:09,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005543618] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:39:09,458 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:39:09,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 12:39:09,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454934242] [2024-05-12 12:39:09,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:39:09,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 12:39:09,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:39:09,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 12:39:09,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-05-12 12:39:09,481 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2024-05-12 12:39:09,481 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 47 transitions, 251 flow. Second operand has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 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 12:39:09,481 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:39:09,482 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2024-05-12 12:39:09,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:39:09,540 INFO L124 PetriNetUnfolderBase]: 180/376 cut-off events. [2024-05-12 12:39:09,541 INFO L125 PetriNetUnfolderBase]: For 807/807 co-relation queries the response was YES. [2024-05-12 12:39:09,541 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1224 conditions, 376 events. 180/376 cut-off events. For 807/807 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1802 event pairs, 70 based on Foata normal form. 2/374 useless extension candidates. Maximal degree in co-relation 1195. Up to 282 conditions per place. [2024-05-12 12:39:09,543 INFO L140 encePairwiseOnDemand]: 30/35 looper letters, 45 selfloop transitions, 6 changer transitions 0/61 dead transitions. [2024-05-12 12:39:09,543 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 61 transitions, 385 flow [2024-05-12 12:39:09,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 12:39:09,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 12:39:09,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 103 transitions. [2024-05-12 12:39:09,544 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5885714285714285 [2024-05-12 12:39:09,544 INFO L175 Difference]: Start difference. First operand has 59 places, 47 transitions, 251 flow. Second operand 5 states and 103 transitions. [2024-05-12 12:39:09,544 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 61 transitions, 385 flow [2024-05-12 12:39:09,545 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 61 transitions, 360 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-05-12 12:39:09,546 INFO L231 Difference]: Finished difference. Result has 61 places, 47 transitions, 242 flow [2024-05-12 12:39:09,546 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=242, PETRI_PLACES=61, PETRI_TRANSITIONS=47} [2024-05-12 12:39:09,547 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 24 predicate places. [2024-05-12 12:39:09,547 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 47 transitions, 242 flow [2024-05-12 12:39:09,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 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 12:39:09,547 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:39:09,547 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:39:09,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-05-12 12:39:09,548 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 12:39:09,548 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:39:09,548 INFO L85 PathProgramCache]: Analyzing trace with hash 1839803947, now seen corresponding path program 1 times [2024-05-12 12:39:09,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:39:09,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676909339] [2024-05-12 12:39:09,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:39:09,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:39:09,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:39:09,663 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 12:39:09,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:39:09,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676909339] [2024-05-12 12:39:09,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676909339] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:39:09,664 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:39:09,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:39:09,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456127114] [2024-05-12 12:39:09,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:39:09,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 12:39:09,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:39:09,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 12:39:09,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-05-12 12:39:09,691 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2024-05-12 12:39:09,691 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 47 transitions, 242 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 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 12:39:09,691 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:39:09,692 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2024-05-12 12:39:09,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:39:09,791 INFO L124 PetriNetUnfolderBase]: 196/410 cut-off events. [2024-05-12 12:39:09,791 INFO L125 PetriNetUnfolderBase]: For 916/919 co-relation queries the response was YES. [2024-05-12 12:39:09,792 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1329 conditions, 410 events. 196/410 cut-off events. For 916/919 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 2019 event pairs, 44 based on Foata normal form. 3/411 useless extension candidates. Maximal degree in co-relation 1299. Up to 244 conditions per place. [2024-05-12 12:39:09,793 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 47 selfloop transitions, 19 changer transitions 0/76 dead transitions. [2024-05-12 12:39:09,794 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 76 transitions, 468 flow [2024-05-12 12:39:09,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 12:39:09,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 12:39:09,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 165 transitions. [2024-05-12 12:39:09,795 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5892857142857143 [2024-05-12 12:39:09,795 INFO L175 Difference]: Start difference. First operand has 61 places, 47 transitions, 242 flow. Second operand 8 states and 165 transitions. [2024-05-12 12:39:09,795 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 76 transitions, 468 flow [2024-05-12 12:39:09,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 76 transitions, 452 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-05-12 12:39:09,798 INFO L231 Difference]: Finished difference. Result has 65 places, 51 transitions, 297 flow [2024-05-12 12:39:09,798 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=297, PETRI_PLACES=65, PETRI_TRANSITIONS=51} [2024-05-12 12:39:09,798 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 28 predicate places. [2024-05-12 12:39:09,798 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 51 transitions, 297 flow [2024-05-12 12:39:09,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 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 12:39:09,799 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:39:09,799 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:39:09,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-05-12 12:39:09,799 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 12:39:09,800 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:39:09,800 INFO L85 PathProgramCache]: Analyzing trace with hash 1673224311, now seen corresponding path program 2 times [2024-05-12 12:39:09,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:39:09,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219298658] [2024-05-12 12:39:09,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:39:09,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:39:09,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:39:09,907 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 12:39:09,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:39:09,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219298658] [2024-05-12 12:39:09,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219298658] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:39:09,907 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:39:09,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:39:09,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766446297] [2024-05-12 12:39:09,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:39:09,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 12:39:09,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:39:09,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 12:39:09,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-05-12 12:39:09,937 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2024-05-12 12:39:09,937 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 51 transitions, 297 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 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 12:39:09,938 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:39:09,938 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2024-05-12 12:39:09,938 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:39:10,037 INFO L124 PetriNetUnfolderBase]: 203/425 cut-off events. [2024-05-12 12:39:10,037 INFO L125 PetriNetUnfolderBase]: For 1240/1243 co-relation queries the response was YES. [2024-05-12 12:39:10,038 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1457 conditions, 425 events. 203/425 cut-off events. For 1240/1243 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 2129 event pairs, 44 based on Foata normal form. 3/426 useless extension candidates. Maximal degree in co-relation 1427. Up to 266 conditions per place. [2024-05-12 12:39:10,040 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 48 selfloop transitions, 17 changer transitions 0/75 dead transitions. [2024-05-12 12:39:10,040 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 75 transitions, 509 flow [2024-05-12 12:39:10,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 12:39:10,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 12:39:10,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 147 transitions. [2024-05-12 12:39:10,041 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-05-12 12:39:10,041 INFO L175 Difference]: Start difference. First operand has 65 places, 51 transitions, 297 flow. Second operand 7 states and 147 transitions. [2024-05-12 12:39:10,041 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 75 transitions, 509 flow [2024-05-12 12:39:10,044 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 75 transitions, 477 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-05-12 12:39:10,045 INFO L231 Difference]: Finished difference. Result has 68 places, 53 transitions, 320 flow [2024-05-12 12:39:10,045 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=267, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=320, PETRI_PLACES=68, PETRI_TRANSITIONS=53} [2024-05-12 12:39:10,045 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 31 predicate places. [2024-05-12 12:39:10,045 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 53 transitions, 320 flow [2024-05-12 12:39:10,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 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 12:39:10,046 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:39:10,046 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:39:10,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-05-12 12:39:10,046 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 12:39:10,046 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:39:10,047 INFO L85 PathProgramCache]: Analyzing trace with hash 1673218731, now seen corresponding path program 3 times [2024-05-12 12:39:10,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:39:10,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575944808] [2024-05-12 12:39:10,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:39:10,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:39:10,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:39:10,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:39:10,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:39:10,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575944808] [2024-05-12 12:39:10,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575944808] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:39:10,163 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:39:10,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:39:10,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769645455] [2024-05-12 12:39:10,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:39:10,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 12:39:10,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:39:10,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 12:39:10,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-05-12 12:39:10,189 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2024-05-12 12:39:10,189 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 53 transitions, 320 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 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 12:39:10,189 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:39:10,189 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2024-05-12 12:39:10,190 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:39:10,278 INFO L124 PetriNetUnfolderBase]: 201/422 cut-off events. [2024-05-12 12:39:10,278 INFO L125 PetriNetUnfolderBase]: For 1339/1342 co-relation queries the response was YES. [2024-05-12 12:39:10,279 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1482 conditions, 422 events. 201/422 cut-off events. For 1339/1342 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 2128 event pairs, 44 based on Foata normal form. 3/422 useless extension candidates. Maximal degree in co-relation 1450. Up to 264 conditions per place. [2024-05-12 12:39:10,280 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 44 selfloop transitions, 17 changer transitions 0/71 dead transitions. [2024-05-12 12:39:10,281 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 71 transitions, 482 flow [2024-05-12 12:39:10,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 12:39:10,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 12:39:10,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 129 transitions. [2024-05-12 12:39:10,282 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6142857142857143 [2024-05-12 12:39:10,282 INFO L175 Difference]: Start difference. First operand has 68 places, 53 transitions, 320 flow. Second operand 6 states and 129 transitions. [2024-05-12 12:39:10,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 71 transitions, 482 flow [2024-05-12 12:39:10,284 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 71 transitions, 436 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-05-12 12:39:10,285 INFO L231 Difference]: Finished difference. Result has 69 places, 53 transitions, 313 flow [2024-05-12 12:39:10,285 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=274, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=313, PETRI_PLACES=69, PETRI_TRANSITIONS=53} [2024-05-12 12:39:10,286 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 32 predicate places. [2024-05-12 12:39:10,286 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 53 transitions, 313 flow [2024-05-12 12:39:10,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 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 12:39:10,286 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:39:10,286 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:39:10,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-05-12 12:39:10,287 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 12:39:10,287 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:39:10,287 INFO L85 PathProgramCache]: Analyzing trace with hash 344301529, now seen corresponding path program 4 times [2024-05-12 12:39:10,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:39:10,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189213741] [2024-05-12 12:39:10,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:39:10,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:39:10,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:39:10,386 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 12:39:10,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:39:10,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189213741] [2024-05-12 12:39:10,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189213741] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:39:10,387 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:39:10,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:39:10,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735822423] [2024-05-12 12:39:10,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:39:10,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 12:39:10,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:39:10,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 12:39:10,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-05-12 12:39:10,422 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2024-05-12 12:39:10,423 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 53 transitions, 313 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 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 12:39:10,423 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:39:10,423 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2024-05-12 12:39:10,423 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:39:10,514 INFO L124 PetriNetUnfolderBase]: 199/419 cut-off events. [2024-05-12 12:39:10,514 INFO L125 PetriNetUnfolderBase]: For 1378/1381 co-relation queries the response was YES. [2024-05-12 12:39:10,515 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1457 conditions, 419 events. 199/419 cut-off events. For 1378/1381 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 2099 event pairs, 44 based on Foata normal form. 3/419 useless extension candidates. Maximal degree in co-relation 1424. Up to 247 conditions per place. [2024-05-12 12:39:10,517 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 48 selfloop transitions, 21 changer transitions 0/79 dead transitions. [2024-05-12 12:39:10,517 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 79 transitions, 519 flow [2024-05-12 12:39:10,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 12:39:10,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 12:39:10,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 164 transitions. [2024-05-12 12:39:10,518 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5857142857142857 [2024-05-12 12:39:10,518 INFO L175 Difference]: Start difference. First operand has 69 places, 53 transitions, 313 flow. Second operand 8 states and 164 transitions. [2024-05-12 12:39:10,518 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 79 transitions, 519 flow [2024-05-12 12:39:10,522 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 79 transitions, 485 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-05-12 12:39:10,523 INFO L231 Difference]: Finished difference. Result has 72 places, 55 transitions, 346 flow [2024-05-12 12:39:10,523 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=279, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=346, PETRI_PLACES=72, PETRI_TRANSITIONS=55} [2024-05-12 12:39:10,523 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 35 predicate places. [2024-05-12 12:39:10,523 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 55 transitions, 346 flow [2024-05-12 12:39:10,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 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 12:39:10,524 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:39:10,524 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:39:10,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-05-12 12:39:10,524 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 12:39:10,524 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:39:10,525 INFO L85 PathProgramCache]: Analyzing trace with hash 991940838, now seen corresponding path program 1 times [2024-05-12 12:39:10,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:39:10,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549112480] [2024-05-12 12:39:10,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:39:10,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:39:10,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:39:10,663 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 12:39:10,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:39:10,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549112480] [2024-05-12 12:39:10,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549112480] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:39:10,663 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:39:10,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:39:10,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488499556] [2024-05-12 12:39:10,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:39:10,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 12:39:10,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:39:10,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 12:39:10,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-05-12 12:39:10,698 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2024-05-12 12:39:10,698 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 55 transitions, 346 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 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 12:39:10,698 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:39:10,699 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2024-05-12 12:39:10,699 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:39:10,768 INFO L124 PetriNetUnfolderBase]: 209/437 cut-off events. [2024-05-12 12:39:10,768 INFO L125 PetriNetUnfolderBase]: For 1673/1676 co-relation queries the response was YES. [2024-05-12 12:39:10,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1566 conditions, 437 events. 209/437 cut-off events. For 1673/1676 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 2225 event pairs, 23 based on Foata normal form. 4/437 useless extension candidates. Maximal degree in co-relation 1532. Up to 235 conditions per place. [2024-05-12 12:39:10,771 INFO L140 encePairwiseOnDemand]: 29/35 looper letters, 54 selfloop transitions, 13 changer transitions 0/77 dead transitions. [2024-05-12 12:39:10,771 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 77 transitions, 556 flow [2024-05-12 12:39:10,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 12:39:10,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 12:39:10,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 127 transitions. [2024-05-12 12:39:10,772 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6047619047619047 [2024-05-12 12:39:10,772 INFO L175 Difference]: Start difference. First operand has 72 places, 55 transitions, 346 flow. Second operand 6 states and 127 transitions. [2024-05-12 12:39:10,772 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 77 transitions, 556 flow [2024-05-12 12:39:10,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 77 transitions, 505 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-05-12 12:39:10,776 INFO L231 Difference]: Finished difference. Result has 72 places, 56 transitions, 331 flow [2024-05-12 12:39:10,777 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=295, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=331, PETRI_PLACES=72, PETRI_TRANSITIONS=56} [2024-05-12 12:39:10,777 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 35 predicate places. [2024-05-12 12:39:10,777 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 56 transitions, 331 flow [2024-05-12 12:39:10,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 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 12:39:10,777 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:39:10,778 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:39:10,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-05-12 12:39:10,778 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 12:39:10,778 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:39:10,778 INFO L85 PathProgramCache]: Analyzing trace with hash 994797798, now seen corresponding path program 2 times [2024-05-12 12:39:10,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:39:10,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698675018] [2024-05-12 12:39:10,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:39:10,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:39:10,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:39:10,892 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:39:10,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:39:10,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698675018] [2024-05-12 12:39:10,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698675018] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:39:10,892 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:39:10,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:39:10,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027593979] [2024-05-12 12:39:10,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:39:10,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 12:39:10,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:39:10,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 12:39:10,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-05-12 12:39:10,920 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2024-05-12 12:39:10,920 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 56 transitions, 331 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 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 12:39:10,920 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:39:10,921 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2024-05-12 12:39:10,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:39:11,000 INFO L124 PetriNetUnfolderBase]: 219/455 cut-off events. [2024-05-12 12:39:11,000 INFO L125 PetriNetUnfolderBase]: For 1799/1802 co-relation queries the response was YES. [2024-05-12 12:39:11,001 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1609 conditions, 455 events. 219/455 cut-off events. For 1799/1802 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 2352 event pairs, 42 based on Foata normal form. 4/455 useless extension candidates. Maximal degree in co-relation 1574. Up to 304 conditions per place. [2024-05-12 12:39:11,003 INFO L140 encePairwiseOnDemand]: 29/35 looper letters, 54 selfloop transitions, 12 changer transitions 0/76 dead transitions. [2024-05-12 12:39:11,003 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 76 transitions, 513 flow [2024-05-12 12:39:11,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 12:39:11,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 12:39:11,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 127 transitions. [2024-05-12 12:39:11,004 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6047619047619047 [2024-05-12 12:39:11,004 INFO L175 Difference]: Start difference. First operand has 72 places, 56 transitions, 331 flow. Second operand 6 states and 127 transitions. [2024-05-12 12:39:11,004 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 76 transitions, 513 flow [2024-05-12 12:39:11,009 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 76 transitions, 485 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-05-12 12:39:11,009 INFO L231 Difference]: Finished difference. Result has 75 places, 57 transitions, 341 flow [2024-05-12 12:39:11,010 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=306, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=341, PETRI_PLACES=75, PETRI_TRANSITIONS=57} [2024-05-12 12:39:11,010 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 38 predicate places. [2024-05-12 12:39:11,010 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 57 transitions, 341 flow [2024-05-12 12:39:11,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 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 12:39:11,011 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:39:11,011 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:39:11,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-05-12 12:39:11,011 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 12:39:11,011 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:39:11,011 INFO L85 PathProgramCache]: Analyzing trace with hash 330168806, now seen corresponding path program 3 times [2024-05-12 12:39:11,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:39:11,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100241695] [2024-05-12 12:39:11,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:39:11,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:39:11,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:39:11,143 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 12:39:11,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:39:11,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100241695] [2024-05-12 12:39:11,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100241695] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:39:11,144 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:39:11,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:39:11,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891526885] [2024-05-12 12:39:11,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:39:11,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 12:39:11,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:39:11,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 12:39:11,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-05-12 12:39:11,176 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2024-05-12 12:39:11,176 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 57 transitions, 341 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 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 12:39:11,177 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:39:11,177 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2024-05-12 12:39:11,177 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:39:11,268 INFO L124 PetriNetUnfolderBase]: 216/450 cut-off events. [2024-05-12 12:39:11,269 INFO L125 PetriNetUnfolderBase]: For 1804/1807 co-relation queries the response was YES. [2024-05-12 12:39:11,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1565 conditions, 450 events. 216/450 cut-off events. For 1804/1807 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2325 event pairs, 22 based on Foata normal form. 4/450 useless extension candidates. Maximal degree in co-relation 1529. Up to 280 conditions per place. [2024-05-12 12:39:11,271 INFO L140 encePairwiseOnDemand]: 29/35 looper letters, 52 selfloop transitions, 11 changer transitions 0/73 dead transitions. [2024-05-12 12:39:11,271 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 73 transitions, 503 flow [2024-05-12 12:39:11,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 12:39:11,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 12:39:11,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 109 transitions. [2024-05-12 12:39:11,272 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6228571428571429 [2024-05-12 12:39:11,272 INFO L175 Difference]: Start difference. First operand has 75 places, 57 transitions, 341 flow. Second operand 5 states and 109 transitions. [2024-05-12 12:39:11,272 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 73 transitions, 503 flow [2024-05-12 12:39:11,275 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 73 transitions, 467 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-05-12 12:39:11,276 INFO L231 Difference]: Finished difference. Result has 75 places, 57 transitions, 333 flow [2024-05-12 12:39:11,276 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=305, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=333, PETRI_PLACES=75, PETRI_TRANSITIONS=57} [2024-05-12 12:39:11,277 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 38 predicate places. [2024-05-12 12:39:11,277 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 57 transitions, 333 flow [2024-05-12 12:39:11,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 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 12:39:11,277 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:39:11,277 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:39:11,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-05-12 12:39:11,278 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 12:39:11,278 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:39:11,278 INFO L85 PathProgramCache]: Analyzing trace with hash 330353504, now seen corresponding path program 1 times [2024-05-12 12:39:11,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:39:11,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759358412] [2024-05-12 12:39:11,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:39:11,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:39:11,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:39:11,394 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:39:11,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:39:11,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759358412] [2024-05-12 12:39:11,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759358412] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:39:11,395 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:39:11,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:39:11,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968290055] [2024-05-12 12:39:11,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:39:11,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 12:39:11,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:39:11,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 12:39:11,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-05-12 12:39:11,424 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2024-05-12 12:39:11,424 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 57 transitions, 333 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 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 12:39:11,424 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:39:11,424 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2024-05-12 12:39:11,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:39:11,504 INFO L124 PetriNetUnfolderBase]: 226/468 cut-off events. [2024-05-12 12:39:11,505 INFO L125 PetriNetUnfolderBase]: For 2033/2036 co-relation queries the response was YES. [2024-05-12 12:39:11,506 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1598 conditions, 468 events. 226/468 cut-off events. For 2033/2036 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2427 event pairs, 41 based on Foata normal form. 4/468 useless extension candidates. Maximal degree in co-relation 1562. Up to 316 conditions per place. [2024-05-12 12:39:11,507 INFO L140 encePairwiseOnDemand]: 29/35 looper letters, 50 selfloop transitions, 11 changer transitions 0/71 dead transitions. [2024-05-12 12:39:11,507 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 71 transitions, 491 flow [2024-05-12 12:39:11,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 12:39:11,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 12:39:11,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 106 transitions. [2024-05-12 12:39:11,508 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6057142857142858 [2024-05-12 12:39:11,508 INFO L175 Difference]: Start difference. First operand has 75 places, 57 transitions, 333 flow. Second operand 5 states and 106 transitions. [2024-05-12 12:39:11,509 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 71 transitions, 491 flow [2024-05-12 12:39:11,512 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 71 transitions, 461 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-05-12 12:39:11,512 INFO L231 Difference]: Finished difference. Result has 75 places, 58 transitions, 341 flow [2024-05-12 12:39:11,513 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=303, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=341, PETRI_PLACES=75, PETRI_TRANSITIONS=58} [2024-05-12 12:39:11,513 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 38 predicate places. [2024-05-12 12:39:11,513 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 58 transitions, 341 flow [2024-05-12 12:39:11,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 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 12:39:11,513 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:39:11,514 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:39:11,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-05-12 12:39:11,514 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 12:39:11,514 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:39:11,514 INFO L85 PathProgramCache]: Analyzing trace with hash -1229480872, now seen corresponding path program 2 times [2024-05-12 12:39:11,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:39:11,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691389928] [2024-05-12 12:39:11,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:39:11,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:39:11,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:39:11,647 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 12:39:11,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:39:11,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691389928] [2024-05-12 12:39:11,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691389928] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:39:11,647 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:39:11,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:39:11,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330369120] [2024-05-12 12:39:11,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:39:11,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 12:39:11,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:39:11,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 12:39:11,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-05-12 12:39:11,671 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2024-05-12 12:39:11,672 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 58 transitions, 341 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 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 12:39:11,672 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:39:11,672 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2024-05-12 12:39:11,672 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:39:11,767 INFO L124 PetriNetUnfolderBase]: 236/486 cut-off events. [2024-05-12 12:39:11,768 INFO L125 PetriNetUnfolderBase]: For 2056/2059 co-relation queries the response was YES. [2024-05-12 12:39:11,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1669 conditions, 486 events. 236/486 cut-off events. For 2056/2059 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 2578 event pairs, 45 based on Foata normal form. 4/486 useless extension candidates. Maximal degree in co-relation 1633. Up to 341 conditions per place. [2024-05-12 12:39:11,771 INFO L140 encePairwiseOnDemand]: 29/35 looper letters, 53 selfloop transitions, 12 changer transitions 0/75 dead transitions. [2024-05-12 12:39:11,771 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 75 transitions, 515 flow [2024-05-12 12:39:11,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 12:39:11,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 12:39:11,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 124 transitions. [2024-05-12 12:39:11,772 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5904761904761905 [2024-05-12 12:39:11,772 INFO L175 Difference]: Start difference. First operand has 75 places, 58 transitions, 341 flow. Second operand 6 states and 124 transitions. [2024-05-12 12:39:11,772 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 75 transitions, 515 flow [2024-05-12 12:39:11,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 75 transitions, 487 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-05-12 12:39:11,777 INFO L231 Difference]: Finished difference. Result has 77 places, 59 transitions, 353 flow [2024-05-12 12:39:11,777 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=313, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=353, PETRI_PLACES=77, PETRI_TRANSITIONS=59} [2024-05-12 12:39:11,777 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 40 predicate places. [2024-05-12 12:39:11,777 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 59 transitions, 353 flow [2024-05-12 12:39:11,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 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 12:39:11,778 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:39:11,778 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:39:11,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-05-12 12:39:11,778 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 12:39:11,778 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:39:11,778 INFO L85 PathProgramCache]: Analyzing trace with hash 1862014192, now seen corresponding path program 3 times [2024-05-12 12:39:11,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:39:11,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305115035] [2024-05-12 12:39:11,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:39:11,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:39:11,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:39:11,893 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 12:39:11,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:39:11,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305115035] [2024-05-12 12:39:11,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305115035] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:39:11,894 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:39:11,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:39:11,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280532827] [2024-05-12 12:39:11,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:39:11,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 12:39:11,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:39:11,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 12:39:11,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-05-12 12:39:11,922 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2024-05-12 12:39:11,923 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 59 transitions, 353 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 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 12:39:11,923 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:39:11,923 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2024-05-12 12:39:11,923 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:39:12,005 INFO L124 PetriNetUnfolderBase]: 233/481 cut-off events. [2024-05-12 12:39:12,005 INFO L125 PetriNetUnfolderBase]: For 1782/1785 co-relation queries the response was YES. [2024-05-12 12:39:12,006 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1613 conditions, 481 events. 233/481 cut-off events. For 1782/1785 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2534 event pairs, 40 based on Foata normal form. 4/481 useless extension candidates. Maximal degree in co-relation 1577. Up to 290 conditions per place. [2024-05-12 12:39:12,008 INFO L140 encePairwiseOnDemand]: 29/35 looper letters, 52 selfloop transitions, 14 changer transitions 0/76 dead transitions. [2024-05-12 12:39:12,008 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 76 transitions, 521 flow [2024-05-12 12:39:12,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 12:39:12,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 12:39:12,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 123 transitions. [2024-05-12 12:39:12,009 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5857142857142857 [2024-05-12 12:39:12,009 INFO L175 Difference]: Start difference. First operand has 77 places, 59 transitions, 353 flow. Second operand 6 states and 123 transitions. [2024-05-12 12:39:12,009 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 76 transitions, 521 flow [2024-05-12 12:39:12,014 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 76 transitions, 491 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-05-12 12:39:12,015 INFO L231 Difference]: Finished difference. Result has 79 places, 59 transitions, 355 flow [2024-05-12 12:39:12,015 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=323, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=355, PETRI_PLACES=79, PETRI_TRANSITIONS=59} [2024-05-12 12:39:12,015 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 42 predicate places. [2024-05-12 12:39:12,016 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 59 transitions, 355 flow [2024-05-12 12:39:12,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 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 12:39:12,016 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:39:12,016 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:39:12,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-05-12 12:39:12,017 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 12:39:12,017 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:39:12,017 INFO L85 PathProgramCache]: Analyzing trace with hash 194139850, now seen corresponding path program 1 times [2024-05-12 12:39:12,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:39:12,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409905567] [2024-05-12 12:39:12,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:39:12,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:39:12,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:39:12,104 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 12:39:12,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:39:12,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409905567] [2024-05-12 12:39:12,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409905567] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:39:12,105 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:39:12,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-05-12 12:39:12,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743769953] [2024-05-12 12:39:12,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:39:12,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-05-12 12:39:12,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:39:12,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-05-12 12:39:12,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-05-12 12:39:12,114 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 35 [2024-05-12 12:39:12,114 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 59 transitions, 355 flow. Second operand has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 0 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 12:39:12,114 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:39:12,114 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 35 [2024-05-12 12:39:12,114 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:39:12,163 INFO L124 PetriNetUnfolderBase]: 120/356 cut-off events. [2024-05-12 12:39:12,163 INFO L125 PetriNetUnfolderBase]: For 793/796 co-relation queries the response was YES. [2024-05-12 12:39:12,164 INFO L83 FinitePrefix]: Finished finitePrefix Result has 994 conditions, 356 events. 120/356 cut-off events. For 793/796 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1936 event pairs, 7 based on Foata normal form. 22/342 useless extension candidates. Maximal degree in co-relation 957. Up to 123 conditions per place. [2024-05-12 12:39:12,165 INFO L140 encePairwiseOnDemand]: 30/35 looper letters, 21 selfloop transitions, 16 changer transitions 1/68 dead transitions. [2024-05-12 12:39:12,165 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 68 transitions, 465 flow [2024-05-12 12:39:12,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-05-12 12:39:12,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-05-12 12:39:12,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 100 transitions. [2024-05-12 12:39:12,166 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7142857142857143 [2024-05-12 12:39:12,166 INFO L175 Difference]: Start difference. First operand has 79 places, 59 transitions, 355 flow. Second operand 4 states and 100 transitions. [2024-05-12 12:39:12,166 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 68 transitions, 465 flow [2024-05-12 12:39:12,169 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 68 transitions, 429 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-05-12 12:39:12,169 INFO L231 Difference]: Finished difference. Result has 80 places, 59 transitions, 385 flow [2024-05-12 12:39:12,170 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=319, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=385, PETRI_PLACES=80, PETRI_TRANSITIONS=59} [2024-05-12 12:39:12,170 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 43 predicate places. [2024-05-12 12:39:12,170 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 59 transitions, 385 flow [2024-05-12 12:39:12,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 0 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 12:39:12,170 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:39:12,171 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 12:39:12,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-05-12 12:39:12,171 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 12:39:12,171 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:39:12,171 INFO L85 PathProgramCache]: Analyzing trace with hash -1953809460, now seen corresponding path program 1 times [2024-05-12 12:39:12,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:39:12,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684835863] [2024-05-12 12:39:12,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:39:12,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:39:12,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:39:12,313 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 12:39:12,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:39:12,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684835863] [2024-05-12 12:39:12,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684835863] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:39:12,314 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:39:12,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 12:39:12,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121111684] [2024-05-12 12:39:12,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:39:12,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 12:39:12,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:39:12,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 12:39:12,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-05-12 12:39:12,357 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2024-05-12 12:39:12,357 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 59 transitions, 385 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 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 12:39:12,358 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:39:12,358 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2024-05-12 12:39:12,358 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:39:12,464 INFO L124 PetriNetUnfolderBase]: 241/545 cut-off events. [2024-05-12 12:39:12,465 INFO L125 PetriNetUnfolderBase]: For 3495/3498 co-relation queries the response was YES. [2024-05-12 12:39:12,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1873 conditions, 545 events. 241/545 cut-off events. For 3495/3498 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 3022 event pairs, 96 based on Foata normal form. 8/527 useless extension candidates. Maximal degree in co-relation 1834. Up to 171 conditions per place. [2024-05-12 12:39:12,468 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 55 selfloop transitions, 22 changer transitions 0/87 dead transitions. [2024-05-12 12:39:12,468 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 87 transitions, 665 flow [2024-05-12 12:39:12,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 12:39:12,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 12:39:12,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 178 transitions. [2024-05-12 12:39:12,470 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5650793650793651 [2024-05-12 12:39:12,470 INFO L175 Difference]: Start difference. First operand has 80 places, 59 transitions, 385 flow. Second operand 9 states and 178 transitions. [2024-05-12 12:39:12,470 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 87 transitions, 665 flow [2024-05-12 12:39:12,475 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 87 transitions, 602 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-05-12 12:39:12,476 INFO L231 Difference]: Finished difference. Result has 85 places, 59 transitions, 381 flow [2024-05-12 12:39:12,476 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=334, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=381, PETRI_PLACES=85, PETRI_TRANSITIONS=59} [2024-05-12 12:39:12,476 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 48 predicate places. [2024-05-12 12:39:12,477 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 59 transitions, 381 flow [2024-05-12 12:39:12,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 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 12:39:12,478 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:39:12,478 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 12:39:12,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-05-12 12:39:12,478 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 12:39:12,479 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:39:12,479 INFO L85 PathProgramCache]: Analyzing trace with hash 773961292, now seen corresponding path program 2 times [2024-05-12 12:39:12,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:39:12,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496504126] [2024-05-12 12:39:12,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:39:12,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:39:12,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:39:12,603 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 12:39:12,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:39:12,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496504126] [2024-05-12 12:39:12,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496504126] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:39:12,603 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:39:12,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 12:39:12,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791540476] [2024-05-12 12:39:12,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:39:12,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 12:39:12,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:39:12,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 12:39:12,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-05-12 12:39:12,636 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2024-05-12 12:39:12,636 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 59 transitions, 381 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 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 12:39:12,636 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:39:12,636 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2024-05-12 12:39:12,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:39:12,775 INFO L124 PetriNetUnfolderBase]: 305/700 cut-off events. [2024-05-12 12:39:12,775 INFO L125 PetriNetUnfolderBase]: For 5022/5025 co-relation queries the response was YES. [2024-05-12 12:39:12,777 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2346 conditions, 700 events. 305/700 cut-off events. For 5022/5025 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 4230 event pairs, 158 based on Foata normal form. 8/673 useless extension candidates. Maximal degree in co-relation 2308. Up to 377 conditions per place. [2024-05-12 12:39:12,780 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 53 selfloop transitions, 22 changer transitions 0/85 dead transitions. [2024-05-12 12:39:12,780 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 85 transitions, 643 flow [2024-05-12 12:39:12,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 12:39:12,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 12:39:12,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 193 transitions. [2024-05-12 12:39:12,782 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5514285714285714 [2024-05-12 12:39:12,782 INFO L175 Difference]: Start difference. First operand has 85 places, 59 transitions, 381 flow. Second operand 10 states and 193 transitions. [2024-05-12 12:39:12,783 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 85 transitions, 643 flow [2024-05-12 12:39:12,789 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 85 transitions, 600 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-05-12 12:39:12,792 INFO L231 Difference]: Finished difference. Result has 88 places, 59 transitions, 385 flow [2024-05-12 12:39:12,793 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=338, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=385, PETRI_PLACES=88, PETRI_TRANSITIONS=59} [2024-05-12 12:39:12,794 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 51 predicate places. [2024-05-12 12:39:12,794 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 59 transitions, 385 flow [2024-05-12 12:39:12,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 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 12:39:12,794 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:39:12,794 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 12:39:12,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-05-12 12:39:12,795 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 12:39:12,795 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:39:12,795 INFO L85 PathProgramCache]: Analyzing trace with hash -1925155654, now seen corresponding path program 3 times [2024-05-12 12:39:12,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:39:12,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822160730] [2024-05-12 12:39:12,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:39:12,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:39:12,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:39:12,937 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 12:39:12,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:39:12,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822160730] [2024-05-12 12:39:12,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822160730] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:39:12,938 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:39:12,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 12:39:12,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460715025] [2024-05-12 12:39:12,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:39:12,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 12:39:12,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:39:12,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 12:39:12,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-05-12 12:39:12,976 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2024-05-12 12:39:12,977 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 59 transitions, 385 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 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 12:39:12,977 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:39:12,977 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2024-05-12 12:39:12,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:39:13,093 INFO L124 PetriNetUnfolderBase]: 253/575 cut-off events. [2024-05-12 12:39:13,093 INFO L125 PetriNetUnfolderBase]: For 3277/3280 co-relation queries the response was YES. [2024-05-12 12:39:13,095 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1776 conditions, 575 events. 253/575 cut-off events. For 3277/3280 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 3242 event pairs, 132 based on Foata normal form. 10/554 useless extension candidates. Maximal degree in co-relation 1737. Up to 361 conditions per place. [2024-05-12 12:39:13,096 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 47 selfloop transitions, 21 changer transitions 0/78 dead transitions. [2024-05-12 12:39:13,097 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 78 transitions, 577 flow [2024-05-12 12:39:13,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 12:39:13,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 12:39:13,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-05-12 12:39:13,099 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.546031746031746 [2024-05-12 12:39:13,099 INFO L175 Difference]: Start difference. First operand has 88 places, 59 transitions, 385 flow. Second operand 9 states and 172 transitions. [2024-05-12 12:39:13,099 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 78 transitions, 577 flow [2024-05-12 12:39:13,106 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 78 transitions, 534 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-05-12 12:39:13,108 INFO L231 Difference]: Finished difference. Result has 89 places, 59 transitions, 388 flow [2024-05-12 12:39:13,108 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=342, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=388, PETRI_PLACES=89, PETRI_TRANSITIONS=59} [2024-05-12 12:39:13,108 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 52 predicate places. [2024-05-12 12:39:13,108 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 59 transitions, 388 flow [2024-05-12 12:39:13,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 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 12:39:13,109 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:39:13,109 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 12:39:13,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-05-12 12:39:13,109 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 12:39:13,109 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:39:13,109 INFO L85 PathProgramCache]: Analyzing trace with hash 1645446890, now seen corresponding path program 4 times [2024-05-12 12:39:13,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:39:13,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904222728] [2024-05-12 12:39:13,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:39:13,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:39:13,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:39:13,236 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 12:39:13,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:39:13,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904222728] [2024-05-12 12:39:13,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904222728] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:39:13,237 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:39:13,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 12:39:13,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185306742] [2024-05-12 12:39:13,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:39:13,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 12:39:13,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:39:13,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 12:39:13,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-05-12 12:39:13,271 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2024-05-12 12:39:13,272 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 59 transitions, 388 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 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 12:39:13,272 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:39:13,272 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2024-05-12 12:39:13,272 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:39:13,390 INFO L124 PetriNetUnfolderBase]: 285/652 cut-off events. [2024-05-12 12:39:13,391 INFO L125 PetriNetUnfolderBase]: For 3658/3661 co-relation queries the response was YES. [2024-05-12 12:39:13,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1982 conditions, 652 events. 285/652 cut-off events. For 3658/3661 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 3878 event pairs, 158 based on Foata normal form. 10/626 useless extension candidates. Maximal degree in co-relation 1942. Up to 431 conditions per place. [2024-05-12 12:39:13,394 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 49 selfloop transitions, 17 changer transitions 0/76 dead transitions. [2024-05-12 12:39:13,395 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 76 transitions, 572 flow [2024-05-12 12:39:13,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 12:39:13,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 12:39:13,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 141 transitions. [2024-05-12 12:39:13,395 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5755102040816327 [2024-05-12 12:39:13,396 INFO L175 Difference]: Start difference. First operand has 89 places, 59 transitions, 388 flow. Second operand 7 states and 141 transitions. [2024-05-12 12:39:13,396 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 76 transitions, 572 flow [2024-05-12 12:39:13,400 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 76 transitions, 532 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-05-12 12:39:13,401 INFO L231 Difference]: Finished difference. Result has 89 places, 59 transitions, 386 flow [2024-05-12 12:39:13,401 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=348, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=386, PETRI_PLACES=89, PETRI_TRANSITIONS=59} [2024-05-12 12:39:13,402 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 52 predicate places. [2024-05-12 12:39:13,402 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 59 transitions, 386 flow [2024-05-12 12:39:13,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 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 12:39:13,402 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:39:13,403 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 12:39:13,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-05-12 12:39:13,403 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 12:39:13,403 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:39:13,403 INFO L85 PathProgramCache]: Analyzing trace with hash 1645299020, now seen corresponding path program 5 times [2024-05-12 12:39:13,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:39:13,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051090288] [2024-05-12 12:39:13,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:39:13,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:39:13,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:39:13,563 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 12:39:13,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:39:13,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051090288] [2024-05-12 12:39:13,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051090288] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:39:13,564 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:39:13,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 12:39:13,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901358139] [2024-05-12 12:39:13,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:39:13,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 12:39:13,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:39:13,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 12:39:13,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-05-12 12:39:13,603 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2024-05-12 12:39:13,604 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 59 transitions, 386 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 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 12:39:13,604 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:39:13,604 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2024-05-12 12:39:13,604 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:39:13,751 INFO L124 PetriNetUnfolderBase]: 349/798 cut-off events. [2024-05-12 12:39:13,751 INFO L125 PetriNetUnfolderBase]: For 5376/5379 co-relation queries the response was YES. [2024-05-12 12:39:13,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2523 conditions, 798 events. 349/798 cut-off events. For 5376/5379 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 5123 event pairs, 154 based on Foata normal form. 8/765 useless extension candidates. Maximal degree in co-relation 2482. Up to 383 conditions per place. [2024-05-12 12:39:13,756 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 54 selfloop transitions, 18 changer transitions 0/82 dead transitions. [2024-05-12 12:39:13,757 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 82 transitions, 642 flow [2024-05-12 12:39:13,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 12:39:13,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 12:39:13,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 146 transitions. [2024-05-12 12:39:13,758 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5959183673469388 [2024-05-12 12:39:13,758 INFO L175 Difference]: Start difference. First operand has 89 places, 59 transitions, 386 flow. Second operand 7 states and 146 transitions. [2024-05-12 12:39:13,758 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 82 transitions, 642 flow [2024-05-12 12:39:13,765 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 82 transitions, 610 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-05-12 12:39:13,767 INFO L231 Difference]: Finished difference. Result has 91 places, 59 transitions, 393 flow [2024-05-12 12:39:13,768 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=354, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=393, PETRI_PLACES=91, PETRI_TRANSITIONS=59} [2024-05-12 12:39:13,768 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 54 predicate places. [2024-05-12 12:39:13,768 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 59 transitions, 393 flow [2024-05-12 12:39:13,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 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 12:39:13,769 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:39:13,769 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 12:39:13,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-05-12 12:39:13,769 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 12:39:13,770 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:39:13,770 INFO L85 PathProgramCache]: Analyzing trace with hash 1650809270, now seen corresponding path program 6 times [2024-05-12 12:39:13,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:39:13,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121855832] [2024-05-12 12:39:13,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:39:13,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:39:13,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:39:13,895 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 12:39:13,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:39:13,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121855832] [2024-05-12 12:39:13,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121855832] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:39:13,896 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:39:13,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 12:39:13,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79653793] [2024-05-12 12:39:13,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:39:13,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 12:39:13,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:39:13,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 12:39:13,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-05-12 12:39:13,963 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2024-05-12 12:39:13,963 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 59 transitions, 393 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 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 12:39:13,964 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:39:13,964 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2024-05-12 12:39:13,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:39:14,124 INFO L124 PetriNetUnfolderBase]: 339/780 cut-off events. [2024-05-12 12:39:14,124 INFO L125 PetriNetUnfolderBase]: For 4651/4654 co-relation queries the response was YES. [2024-05-12 12:39:14,127 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2340 conditions, 780 events. 339/780 cut-off events. For 4651/4654 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 4959 event pairs, 202 based on Foata normal form. 10/745 useless extension candidates. Maximal degree in co-relation 2298. Up to 541 conditions per place. [2024-05-12 12:39:14,129 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 50 selfloop transitions, 17 changer transitions 0/77 dead transitions. [2024-05-12 12:39:14,129 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 77 transitions, 581 flow [2024-05-12 12:39:14,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 12:39:14,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 12:39:14,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-05-12 12:39:14,130 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5571428571428572 [2024-05-12 12:39:14,130 INFO L175 Difference]: Start difference. First operand has 91 places, 59 transitions, 393 flow. Second operand 8 states and 156 transitions. [2024-05-12 12:39:14,131 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 77 transitions, 581 flow [2024-05-12 12:39:14,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 77 transitions, 546 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-05-12 12:39:14,138 INFO L231 Difference]: Finished difference. Result has 94 places, 59 transitions, 396 flow [2024-05-12 12:39:14,138 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=358, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=396, PETRI_PLACES=94, PETRI_TRANSITIONS=59} [2024-05-12 12:39:14,139 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 57 predicate places. [2024-05-12 12:39:14,139 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 59 transitions, 396 flow [2024-05-12 12:39:14,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 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 12:39:14,139 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:39:14,139 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 12:39:14,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-05-12 12:39:14,140 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 12:39:14,140 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:39:14,140 INFO L85 PathProgramCache]: Analyzing trace with hash 1651024472, now seen corresponding path program 1 times [2024-05-12 12:39:14,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:39:14,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738732657] [2024-05-12 12:39:14,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:39:14,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:39:14,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:39:14,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:39:14,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:39:14,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738732657] [2024-05-12 12:39:14,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738732657] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:39:14,271 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:39:14,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 12:39:14,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746706542] [2024-05-12 12:39:14,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:39:14,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 12:39:14,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:39:14,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 12:39:14,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-05-12 12:39:14,321 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2024-05-12 12:39:14,322 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 59 transitions, 396 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 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 12:39:14,322 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:39:14,322 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2024-05-12 12:39:14,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:39:14,466 INFO L124 PetriNetUnfolderBase]: 361/839 cut-off events. [2024-05-12 12:39:14,466 INFO L125 PetriNetUnfolderBase]: For 4469/4472 co-relation queries the response was YES. [2024-05-12 12:39:14,468 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2472 conditions, 839 events. 361/839 cut-off events. For 4469/4472 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 5507 event pairs, 188 based on Foata normal form. 8/802 useless extension candidates. Maximal degree in co-relation 2429. Up to 441 conditions per place. [2024-05-12 12:39:14,471 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 53 selfloop transitions, 19 changer transitions 0/82 dead transitions. [2024-05-12 12:39:14,471 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 82 transitions, 610 flow [2024-05-12 12:39:14,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 12:39:14,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 12:39:14,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-05-12 12:39:14,472 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-05-12 12:39:14,472 INFO L175 Difference]: Start difference. First operand has 94 places, 59 transitions, 396 flow. Second operand 8 states and 160 transitions. [2024-05-12 12:39:14,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 82 transitions, 610 flow [2024-05-12 12:39:14,479 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 82 transitions, 578 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-05-12 12:39:14,480 INFO L231 Difference]: Finished difference. Result has 96 places, 59 transitions, 405 flow [2024-05-12 12:39:14,480 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=364, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=405, PETRI_PLACES=96, PETRI_TRANSITIONS=59} [2024-05-12 12:39:14,481 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 59 predicate places. [2024-05-12 12:39:14,481 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 59 transitions, 405 flow [2024-05-12 12:39:14,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 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 12:39:14,481 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:39:14,481 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 12:39:14,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-05-12 12:39:14,481 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 12:39:14,482 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:39:14,482 INFO L85 PathProgramCache]: Analyzing trace with hash 161302680, now seen corresponding path program 7 times [2024-05-12 12:39:14,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:39:14,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047628785] [2024-05-12 12:39:14,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:39:14,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:39:14,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:39:14,605 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 12:39:14,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:39:14,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047628785] [2024-05-12 12:39:14,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047628785] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:39:14,606 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:39:14,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 12:39:14,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999233794] [2024-05-12 12:39:14,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:39:14,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 12:39:14,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:39:14,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 12:39:14,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-05-12 12:39:14,638 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2024-05-12 12:39:14,639 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 59 transitions, 405 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 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 12:39:14,639 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:39:14,639 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2024-05-12 12:39:14,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:39:14,780 INFO L124 PetriNetUnfolderBase]: 380/880 cut-off events. [2024-05-12 12:39:14,780 INFO L125 PetriNetUnfolderBase]: For 4926/4929 co-relation queries the response was YES. [2024-05-12 12:39:14,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2553 conditions, 880 events. 380/880 cut-off events. For 4926/4929 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 5890 event pairs, 243 based on Foata normal form. 10/838 useless extension candidates. Maximal degree in co-relation 2509. Up to 622 conditions per place. [2024-05-12 12:39:14,789 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 47 selfloop transitions, 21 changer transitions 0/78 dead transitions. [2024-05-12 12:39:14,789 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 78 transitions, 597 flow [2024-05-12 12:39:14,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 12:39:14,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 12:39:14,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-05-12 12:39:14,790 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.546031746031746 [2024-05-12 12:39:14,790 INFO L175 Difference]: Start difference. First operand has 96 places, 59 transitions, 405 flow. Second operand 9 states and 172 transitions. [2024-05-12 12:39:14,790 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 78 transitions, 597 flow [2024-05-12 12:39:14,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 78 transitions, 560 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-05-12 12:39:14,798 INFO L231 Difference]: Finished difference. Result has 99 places, 59 transitions, 414 flow [2024-05-12 12:39:14,798 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=368, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=414, PETRI_PLACES=99, PETRI_TRANSITIONS=59} [2024-05-12 12:39:14,804 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 62 predicate places. [2024-05-12 12:39:14,804 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 59 transitions, 414 flow [2024-05-12 12:39:14,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 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 12:39:14,804 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:39:14,804 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 12:39:14,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-05-12 12:39:14,805 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 12:39:14,805 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:39:14,805 INFO L85 PathProgramCache]: Analyzing trace with hash 418018392, now seen corresponding path program 2 times [2024-05-12 12:39:14,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:39:14,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924620000] [2024-05-12 12:39:14,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:39:14,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:39:14,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:39:14,975 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 12:39:14,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:39:14,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924620000] [2024-05-12 12:39:14,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924620000] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:39:14,976 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:39:14,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 12:39:14,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961217162] [2024-05-12 12:39:14,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:39:14,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 12:39:14,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:39:14,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 12:39:14,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-05-12 12:39:15,017 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2024-05-12 12:39:15,018 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 59 transitions, 414 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 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 12:39:15,018 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:39:15,018 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2024-05-12 12:39:15,018 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:39:15,162 INFO L124 PetriNetUnfolderBase]: 402/954 cut-off events. [2024-05-12 12:39:15,163 INFO L125 PetriNetUnfolderBase]: For 4623/4626 co-relation queries the response was YES. [2024-05-12 12:39:15,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2704 conditions, 954 events. 402/954 cut-off events. For 4623/4626 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 6537 event pairs, 251 based on Foata normal form. 8/913 useless extension candidates. Maximal degree in co-relation 2659. Up to 602 conditions per place. [2024-05-12 12:39:15,168 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 52 selfloop transitions, 22 changer transitions 0/84 dead transitions. [2024-05-12 12:39:15,168 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 84 transitions, 636 flow [2024-05-12 12:39:15,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 12:39:15,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 12:39:15,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 192 transitions. [2024-05-12 12:39:15,169 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5485714285714286 [2024-05-12 12:39:15,169 INFO L175 Difference]: Start difference. First operand has 99 places, 59 transitions, 414 flow. Second operand 10 states and 192 transitions. [2024-05-12 12:39:15,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 84 transitions, 636 flow [2024-05-12 12:39:15,177 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 84 transitions, 596 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-05-12 12:39:15,178 INFO L231 Difference]: Finished difference. Result has 102 places, 59 transitions, 421 flow [2024-05-12 12:39:15,178 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=374, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=421, PETRI_PLACES=102, PETRI_TRANSITIONS=59} [2024-05-12 12:39:15,180 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 65 predicate places. [2024-05-12 12:39:15,180 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 59 transitions, 421 flow [2024-05-12 12:39:15,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 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 12:39:15,180 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:39:15,180 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 12:39:15,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-05-12 12:39:15,181 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 12:39:15,181 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:39:15,181 INFO L85 PathProgramCache]: Analyzing trace with hash 427215162, now seen corresponding path program 3 times [2024-05-12 12:39:15,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:39:15,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694468477] [2024-05-12 12:39:15,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:39:15,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:39:15,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:39:15,315 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 12:39:15,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:39:15,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694468477] [2024-05-12 12:39:15,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694468477] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:39:15,316 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:39:15,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 12:39:15,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824953748] [2024-05-12 12:39:15,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:39:15,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 12:39:15,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:39:15,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 12:39:15,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-05-12 12:39:15,360 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2024-05-12 12:39:15,361 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 59 transitions, 421 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 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 12:39:15,361 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:39:15,361 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2024-05-12 12:39:15,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:39:15,486 INFO L124 PetriNetUnfolderBase]: 395/921 cut-off events. [2024-05-12 12:39:15,486 INFO L125 PetriNetUnfolderBase]: For 3135/3138 co-relation queries the response was YES. [2024-05-12 12:39:15,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2521 conditions, 921 events. 395/921 cut-off events. For 3135/3138 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 6245 event pairs, 228 based on Foata normal form. 8/879 useless extension candidates. Maximal degree in co-relation 2475. Up to 348 conditions per place. [2024-05-12 12:39:15,491 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 53 selfloop transitions, 22 changer transitions 0/85 dead transitions. [2024-05-12 12:39:15,491 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 85 transitions, 597 flow [2024-05-12 12:39:15,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 12:39:15,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 12:39:15,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 176 transitions. [2024-05-12 12:39:15,492 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5587301587301587 [2024-05-12 12:39:15,492 INFO L175 Difference]: Start difference. First operand has 102 places, 59 transitions, 421 flow. Second operand 9 states and 176 transitions. [2024-05-12 12:39:15,492 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 85 transitions, 597 flow [2024-05-12 12:39:15,495 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 85 transitions, 486 flow, removed 5 selfloop flow, removed 30 redundant places. [2024-05-12 12:39:15,496 INFO L231 Difference]: Finished difference. Result has 79 places, 58 transitions, 308 flow [2024-05-12 12:39:15,496 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=264, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=308, PETRI_PLACES=79, PETRI_TRANSITIONS=58} [2024-05-12 12:39:15,497 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 42 predicate places. [2024-05-12 12:39:15,497 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 58 transitions, 308 flow [2024-05-12 12:39:15,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 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 12:39:15,497 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:39:15,497 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:39:15,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-05-12 12:39:15,498 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 12:39:15,498 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:39:15,498 INFO L85 PathProgramCache]: Analyzing trace with hash 1753232546, now seen corresponding path program 1 times [2024-05-12 12:39:15,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:39:15,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033386390] [2024-05-12 12:39:15,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:39:15,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:39:15,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:39:15,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:39:15,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:39:15,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033386390] [2024-05-12 12:39:15,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033386390] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:39:15,575 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:39:15,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 12:39:15,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055235356] [2024-05-12 12:39:15,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:39:15,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-05-12 12:39:15,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:39:15,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-05-12 12:39:15,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-05-12 12:39:15,586 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 35 [2024-05-12 12:39:15,587 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 58 transitions, 308 flow. Second operand has 5 states, 5 states have (on average 20.4) internal successors, (102), 5 states have internal predecessors, (102), 0 states have call successors, (0), 0 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 12:39:15,587 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:39:15,587 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 35 [2024-05-12 12:39:15,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:39:15,658 INFO L124 PetriNetUnfolderBase]: 292/841 cut-off events. [2024-05-12 12:39:15,659 INFO L125 PetriNetUnfolderBase]: For 518/519 co-relation queries the response was YES. [2024-05-12 12:39:15,660 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1887 conditions, 841 events. 292/841 cut-off events. For 518/519 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 5616 event pairs, 14 based on Foata normal form. 69/876 useless extension candidates. Maximal degree in co-relation 1863. Up to 244 conditions per place. [2024-05-12 12:39:15,661 INFO L140 encePairwiseOnDemand]: 30/35 looper letters, 20 selfloop transitions, 18 changer transitions 1/68 dead transitions. [2024-05-12 12:39:15,662 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 68 transitions, 409 flow [2024-05-12 12:39:15,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 12:39:15,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 12:39:15,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 119 transitions. [2024-05-12 12:39:15,663 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.68 [2024-05-12 12:39:15,663 INFO L175 Difference]: Start difference. First operand has 79 places, 58 transitions, 308 flow. Second operand 5 states and 119 transitions. [2024-05-12 12:39:15,663 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 68 transitions, 409 flow [2024-05-12 12:39:15,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 68 transitions, 366 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-05-12 12:39:15,665 INFO L231 Difference]: Finished difference. Result has 78 places, 58 transitions, 324 flow [2024-05-12 12:39:15,665 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=265, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=324, PETRI_PLACES=78, PETRI_TRANSITIONS=58} [2024-05-12 12:39:15,665 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 41 predicate places. [2024-05-12 12:39:15,665 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 58 transitions, 324 flow [2024-05-12 12:39:15,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.4) internal successors, (102), 5 states have internal predecessors, (102), 0 states have call successors, (0), 0 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 12:39:15,666 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:39:15,666 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:39:15,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-05-12 12:39:15,666 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 12:39:15,667 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:39:15,667 INFO L85 PathProgramCache]: Analyzing trace with hash 1013965456, now seen corresponding path program 1 times [2024-05-12 12:39:15,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:39:15,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597594117] [2024-05-12 12:39:15,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:39:15,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:39:15,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:39:15,784 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 12:39:15,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:39:15,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597594117] [2024-05-12 12:39:15,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597594117] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:39:15,784 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:39:15,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 12:39:15,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122242718] [2024-05-12 12:39:15,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:39:15,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 12:39:15,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:39:15,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 12:39:15,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-05-12 12:39:15,819 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 35 [2024-05-12 12:39:15,820 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 58 transitions, 324 flow. Second operand has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:39:15,820 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:39:15,820 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 35 [2024-05-12 12:39:15,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:39:15,895 INFO L124 PetriNetUnfolderBase]: 231/638 cut-off events. [2024-05-12 12:39:15,896 INFO L125 PetriNetUnfolderBase]: For 468/468 co-relation queries the response was YES. [2024-05-12 12:39:15,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1592 conditions, 638 events. 231/638 cut-off events. For 468/468 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 3904 event pairs, 93 based on Foata normal form. 28/601 useless extension candidates. Maximal degree in co-relation 1566. Up to 172 conditions per place. [2024-05-12 12:39:15,898 INFO L140 encePairwiseOnDemand]: 29/35 looper letters, 17 selfloop transitions, 4 changer transitions 32/70 dead transitions. [2024-05-12 12:39:15,898 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 70 transitions, 430 flow [2024-05-12 12:39:15,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 12:39:15,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 12:39:15,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 127 transitions. [2024-05-12 12:39:15,899 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6047619047619047 [2024-05-12 12:39:15,899 INFO L175 Difference]: Start difference. First operand has 78 places, 58 transitions, 324 flow. Second operand 6 states and 127 transitions. [2024-05-12 12:39:15,899 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 70 transitions, 430 flow [2024-05-12 12:39:15,900 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 70 transitions, 342 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-05-12 12:39:15,901 INFO L231 Difference]: Finished difference. Result has 78 places, 35 transitions, 137 flow [2024-05-12 12:39:15,901 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=240, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=137, PETRI_PLACES=78, PETRI_TRANSITIONS=35} [2024-05-12 12:39:15,901 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 41 predicate places. [2024-05-12 12:39:15,902 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 35 transitions, 137 flow [2024-05-12 12:39:15,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:39:15,902 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:39:15,902 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:39:15,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-05-12 12:39:15,902 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 12:39:15,903 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:39:15,903 INFO L85 PathProgramCache]: Analyzing trace with hash -1081719100, now seen corresponding path program 2 times [2024-05-12 12:39:15,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:39:15,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386939136] [2024-05-12 12:39:15,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:39:15,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:39:15,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:39:15,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:39:15,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:39:15,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386939136] [2024-05-12 12:39:15,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386939136] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:39:15,986 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:39:15,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 12:39:15,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506555713] [2024-05-12 12:39:15,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:39:15,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 12:39:15,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:39:15,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 12:39:15,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-05-12 12:39:16,015 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 35 [2024-05-12 12:39:16,016 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 35 transitions, 137 flow. Second operand has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:39:16,016 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:39:16,016 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 35 [2024-05-12 12:39:16,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:39:16,064 INFO L124 PetriNetUnfolderBase]: 69/197 cut-off events. [2024-05-12 12:39:16,065 INFO L125 PetriNetUnfolderBase]: For 51/51 co-relation queries the response was YES. [2024-05-12 12:39:16,065 INFO L83 FinitePrefix]: Finished finitePrefix Result has 450 conditions, 197 events. 69/197 cut-off events. For 51/51 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 782 event pairs, 18 based on Foata normal form. 12/189 useless extension candidates. Maximal degree in co-relation 440. Up to 73 conditions per place. [2024-05-12 12:39:16,065 INFO L140 encePairwiseOnDemand]: 30/35 looper letters, 0 selfloop transitions, 0 changer transitions 39/39 dead transitions. [2024-05-12 12:39:16,065 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 39 transitions, 193 flow [2024-05-12 12:39:16,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 12:39:16,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 12:39:16,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 119 transitions. [2024-05-12 12:39:16,066 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5666666666666667 [2024-05-12 12:39:16,066 INFO L175 Difference]: Start difference. First operand has 78 places, 35 transitions, 137 flow. Second operand 6 states and 119 transitions. [2024-05-12 12:39:16,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 39 transitions, 193 flow [2024-05-12 12:39:16,067 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 39 transitions, 155 flow, removed 2 selfloop flow, removed 14 redundant places. [2024-05-12 12:39:16,067 INFO L231 Difference]: Finished difference. Result has 48 places, 0 transitions, 0 flow [2024-05-12 12:39:16,067 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=93, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=0, PETRI_PLACES=48, PETRI_TRANSITIONS=0} [2024-05-12 12:39:16,068 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 11 predicate places. [2024-05-12 12:39:16,068 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 0 transitions, 0 flow [2024-05-12 12:39:16,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:39:16,071 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (4 of 5 remaining) [2024-05-12 12:39:16,072 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 5 remaining) [2024-05-12 12:39:16,073 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2024-05-12 12:39:16,074 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 5 remaining) [2024-05-12 12:39:16,074 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 5 remaining) [2024-05-12 12:39:16,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-05-12 12:39:16,074 INFO L445 BasicCegarLoop]: Path program histogram: [7, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:39:16,076 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2024-05-12 12:39:16,077 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2024-05-12 12:39:16,079 INFO L507 ceAbstractionStarter]: Automizer considered 2 witness invariants [2024-05-12 12:39:16,079 INFO L508 ceAbstractionStarter]: WitnessConsidered=2 [2024-05-12 12:39:16,080 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.05 12:39:16 BasicIcfg [2024-05-12 12:39:16,080 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-05-12 12:39:16,081 INFO L158 Benchmark]: Toolchain (without parser) took 10391.86ms. Allocated memory was 161.5MB in the beginning and 429.9MB in the end (delta: 268.4MB). Free memory was 88.5MB in the beginning and 280.2MB in the end (delta: -191.7MB). Peak memory consumption was 79.2MB. Max. memory is 16.1GB. [2024-05-12 12:39:16,081 INFO L158 Benchmark]: Witness Parser took 0.15ms. Allocated memory is still 161.5MB. Free memory is still 122.7MB. There was no memory consumed. Max. memory is 16.1GB. [2024-05-12 12:39:16,081 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 161.5MB. Free memory is still 134.6MB. There was no memory consumed. Max. memory is 16.1GB. [2024-05-12 12:39:16,081 INFO L158 Benchmark]: CACSL2BoogieTranslator took 526.88ms. Allocated memory is still 161.5MB. Free memory was 88.1MB in the beginning and 127.0MB in the end (delta: -39.0MB). Peak memory consumption was 30.3MB. Max. memory is 16.1GB. [2024-05-12 12:39:16,082 INFO L158 Benchmark]: Boogie Procedure Inliner took 38.91ms. Allocated memory is still 161.5MB. Free memory was 127.0MB in the beginning and 125.0MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-05-12 12:39:16,082 INFO L158 Benchmark]: Boogie Preprocessor took 38.01ms. Allocated memory is still 161.5MB. Free memory was 125.0MB in the beginning and 122.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-05-12 12:39:16,082 INFO L158 Benchmark]: RCFGBuilder took 440.77ms. Allocated memory is still 161.5MB. Free memory was 122.9MB in the beginning and 100.5MB in the end (delta: 22.4MB). Peak memory consumption was 23.1MB. Max. memory is 16.1GB. [2024-05-12 12:39:16,082 INFO L158 Benchmark]: TraceAbstraction took 9335.29ms. Allocated memory was 161.5MB in the beginning and 429.9MB in the end (delta: 268.4MB). Free memory was 99.7MB in the beginning and 280.2MB in the end (delta: -180.5MB). Peak memory consumption was 88.8MB. Max. memory is 16.1GB. [2024-05-12 12:39:16,083 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Witness Parser took 0.15ms. Allocated memory is still 161.5MB. Free memory is still 122.7MB. There was no memory consumed. Max. memory is 16.1GB. * CDTParser took 0.14ms. Allocated memory is still 161.5MB. Free memory is still 134.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 526.88ms. Allocated memory is still 161.5MB. Free memory was 88.1MB in the beginning and 127.0MB in the end (delta: -39.0MB). Peak memory consumption was 30.3MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 38.91ms. Allocated memory is still 161.5MB. Free memory was 127.0MB in the beginning and 125.0MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 38.01ms. Allocated memory is still 161.5MB. Free memory was 125.0MB in the beginning and 122.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 440.77ms. Allocated memory is still 161.5MB. Free memory was 122.9MB in the beginning and 100.5MB in the end (delta: 22.4MB). Peak memory consumption was 23.1MB. Max. memory is 16.1GB. * TraceAbstraction took 9335.29ms. Allocated memory was 161.5MB in the beginning and 429.9MB in the end (delta: 268.4MB). Free memory was 99.7MB in the beginning and 280.2MB in the end (delta: -180.5MB). Peak memory consumption was 88.8MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 763]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 764]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 18]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 51 locations, 5 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 9.2s, OverallIterations: 33, TraceHistogramMax: 1, PathProgramHistogramMax: 7, EmptinessCheckTime: 0.0s, AutomataDifference: 4.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1841 SdHoareTripleChecker+Valid, 2.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1498 mSDsluCounter, 432 SdHoareTripleChecker+Invalid, 2.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 281 mSDsCounter, 176 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 5514 IncrementalHoareTripleChecker+Invalid, 5690 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 176 mSolverCounterUnsat, 151 mSDtfsCounter, 5514 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 207 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 1.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=421occurred in iteration=29, InterpolantAutomatonStates: 209, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 4.0s InterpolantComputationTime, 523 NumberOfCodeBlocks, 523 NumberOfCodeBlocksAsserted, 33 NumberOfCheckSat, 490 ConstructedInterpolants, 0 QuantifiedInterpolants, 4550 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 33 InterpolantComputations, 33 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 3 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2024-05-12 12:39:16,132 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE