./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe011_tso.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-05-21_14-57-05.files/protection/safe011_tso.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 76401ed0 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/safe011_tso.i ./goblint.2024-05-21_14-57-05.files/protection/safe011_tso.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-76401ed-m [2024-06-20 15:15:34,018 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-20 15:15:34,094 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-20 15:15:34,100 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-20 15:15:34,101 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-20 15:15:34,117 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-20 15:15:34,119 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-20 15:15:34,120 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-20 15:15:34,120 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-20 15:15:34,123 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-20 15:15:34,123 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-20 15:15:34,124 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-20 15:15:34,124 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-20 15:15:34,125 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-20 15:15:34,126 INFO L153 SettingsManager]: * Use SBE=true [2024-06-20 15:15:34,126 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-20 15:15:34,126 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-20 15:15:34,126 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-20 15:15:34,126 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-20 15:15:34,126 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-20 15:15:34,127 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-20 15:15:34,127 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-20 15:15:34,127 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-20 15:15:34,127 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-20 15:15:34,128 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-20 15:15:34,128 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-20 15:15:34,128 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-20 15:15:34,128 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-20 15:15:34,129 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-20 15:15:34,129 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-20 15:15:34,130 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-20 15:15:34,130 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-20 15:15:34,130 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-20 15:15:34,130 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-20 15:15:34,130 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-20 15:15:34,130 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-20 15:15:34,131 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-20 15:15:34,131 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-20 15:15:34,131 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-20 15:15:34,131 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-20 15:15:34,131 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-20 15:15:34,131 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-20 15:15:34,132 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-20 15:15:34,132 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-20 15:15:34,331 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-20 15:15:34,355 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-20 15:15:34,357 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-20 15:15:34,358 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-20 15:15:34,358 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-20 15:15:34,359 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/safe011_tso.yml/witness.yml [2024-06-20 15:15:34,452 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-20 15:15:34,452 INFO L274 PluginConnector]: CDTParser initialized [2024-06-20 15:15:34,454 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe011_tso.i [2024-06-20 15:15:35,450 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-20 15:15:35,675 INFO L384 CDTParser]: Found 1 translation units. [2024-06-20 15:15:35,676 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe011_tso.i [2024-06-20 15:15:35,688 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/600406272/8536adc40ac64821a2ff7c19bb380cfc/FLAGf21da3c42 [2024-06-20 15:15:35,701 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/600406272/8536adc40ac64821a2ff7c19bb380cfc [2024-06-20 15:15:35,703 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-20 15:15:35,704 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-20 15:15:35,707 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-20 15:15:35,707 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-20 15:15:35,711 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-20 15:15:35,712 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 03:15:34" (1/2) ... [2024-06-20 15:15:35,713 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5928242d and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 03:15:35, skipping insertion in model container [2024-06-20 15:15:35,713 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 03:15:34" (1/2) ... [2024-06-20 15:15:35,714 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@245dd2f and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 03:15:35, skipping insertion in model container [2024-06-20 15:15:35,714 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.06 03:15:35" (2/2) ... [2024-06-20 15:15:35,715 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5928242d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 03:15:35, skipping insertion in model container [2024-06-20 15:15:35,715 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.06 03:15:35" (2/2) ... [2024-06-20 15:15:35,715 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-20 15:15:35,746 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-20 15:15:35,747 INFO L97 edCorrectnessWitness]: Location invariant before [L779-L779] ((((! multithreaded || (((0 <= z && z <= 2) && z <= 127) && ((z == 0 || z == 1) || z == 2))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1))) [2024-06-20 15:15:35,747 INFO L97 edCorrectnessWitness]: Location invariant before [L781-L781] ((((! multithreaded || (((0 <= z && z <= 2) && z <= 127) && ((z == 0 || z == 1) || z == 2))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1))) [2024-06-20 15:15:35,747 INFO L97 edCorrectnessWitness]: Location invariant before [L782-L782] ((((! multithreaded || (((0 <= z && z <= 2) && z <= 127) && ((z == 0 || z == 1) || z == 2))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1))) [2024-06-20 15:15:35,747 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-20 15:15:35,747 INFO L106 edCorrectnessWitness]: ghost_update [L777-L777] multithreaded = 1; [2024-06-20 15:15:35,779 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-20 15:15:36,011 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-20 15:15:36,020 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-20 15:15:36,113 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-20 15:15:36,138 INFO L206 MainTranslator]: Completed translation [2024-06-20 15:15:36,139 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 03:15:36 WrapperNode [2024-06-20 15:15:36,139 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-20 15:15:36,139 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-20 15:15:36,140 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-20 15:15:36,140 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-20 15:15:36,144 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 03:15:36" (1/1) ... [2024-06-20 15:15:36,153 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 03:15:36" (1/1) ... [2024-06-20 15:15:36,171 INFO L138 Inliner]: procedures = 175, calls = 42, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 65 [2024-06-20 15:15:36,171 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-20 15:15:36,172 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-20 15:15:36,172 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-20 15:15:36,172 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-20 15:15:36,180 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 03:15:36" (1/1) ... [2024-06-20 15:15:36,180 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 03:15:36" (1/1) ... [2024-06-20 15:15:36,182 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 03:15:36" (1/1) ... [2024-06-20 15:15:36,193 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-20 15:15:36,194 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 03:15:36" (1/1) ... [2024-06-20 15:15:36,194 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 03:15:36" (1/1) ... [2024-06-20 15:15:36,209 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 03:15:36" (1/1) ... [2024-06-20 15:15:36,211 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 03:15:36" (1/1) ... [2024-06-20 15:15:36,212 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 03:15:36" (1/1) ... [2024-06-20 15:15:36,213 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 03:15:36" (1/1) ... [2024-06-20 15:15:36,214 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-20 15:15:36,215 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-20 15:15:36,215 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-20 15:15:36,215 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-20 15:15:36,216 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 03:15:36" (1/1) ... [2024-06-20 15:15:36,220 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-20 15:15:36,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-20 15:15:36,236 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-20 15:15:36,244 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-20 15:15:36,262 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-20 15:15:36,262 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-20 15:15:36,262 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-20 15:15:36,262 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-20 15:15:36,262 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-20 15:15:36,263 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-20 15:15:36,263 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-20 15:15:36,263 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-20 15:15:36,263 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-20 15:15:36,263 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-20 15:15:36,263 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-20 15:15:36,263 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-20 15:15:36,264 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-20 15:15:36,347 INFO L244 CfgBuilder]: Building ICFG [2024-06-20 15:15:36,349 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-20 15:15:36,551 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-20 15:15:36,551 INFO L293 CfgBuilder]: Performing block encoding [2024-06-20 15:15:36,636 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-20 15:15:36,636 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-20 15:15:36,637 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.06 03:15:36 BoogieIcfgContainer [2024-06-20 15:15:36,637 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-20 15:15:36,638 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-20 15:15:36,638 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-20 15:15:36,641 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-20 15:15:36,641 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 03:15:34" (1/4) ... [2024-06-20 15:15:36,641 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26f7e2a9 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 20.06 03:15:36, skipping insertion in model container [2024-06-20 15:15:36,641 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.06 03:15:35" (2/4) ... [2024-06-20 15:15:36,641 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26f7e2a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.06 03:15:36, skipping insertion in model container [2024-06-20 15:15:36,642 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 03:15:36" (3/4) ... [2024-06-20 15:15:36,642 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26f7e2a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.06 03:15:36, skipping insertion in model container [2024-06-20 15:15:36,642 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.06 03:15:36" (4/4) ... [2024-06-20 15:15:36,643 INFO L112 eAbstractionObserver]: Analyzing ICFG safe011_tso.i [2024-06-20 15:15:36,655 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-20 15:15:36,655 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-20 15:15:36,655 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-20 15:15:36,692 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-20 15:15:36,718 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 50 places, 40 transitions, 92 flow [2024-06-20 15:15:36,749 INFO L124 PetriNetUnfolderBase]: 0/37 cut-off events. [2024-06-20 15:15:36,749 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-20 15:15:36,750 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47 conditions, 37 events. 0/37 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 61 event pairs, 0 based on Foata normal form. 0/34 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-20 15:15:36,751 INFO L82 GeneralOperation]: Start removeDead. Operand has 50 places, 40 transitions, 92 flow [2024-06-20 15:15:36,754 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 41 places, 31 transitions, 71 flow [2024-06-20 15:15:36,762 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-20 15:15:36,767 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;@5da5e573, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-20 15:15:36,767 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-20 15:15:36,769 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-20 15:15:36,769 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-20 15:15:36,769 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-20 15:15:36,770 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:36,770 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-20 15:15:36,770 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:15:36,774 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:36,774 INFO L85 PathProgramCache]: Analyzing trace with hash 218856700, now seen corresponding path program 1 times [2024-06-20 15:15:36,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:36,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289889402] [2024-06-20 15:15:36,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:36,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:36,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:37,168 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:37,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:37,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289889402] [2024-06-20 15:15:37,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289889402] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:37,170 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:37,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-20 15:15:37,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229238428] [2024-06-20 15:15:37,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:37,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-20 15:15:37,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:37,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-20 15:15:37,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-20 15:15:37,242 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 15:15:37,245 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 31 transitions, 71 flow. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:37,245 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:37,245 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 15:15:37,246 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:37,478 INFO L124 PetriNetUnfolderBase]: 776/1272 cut-off events. [2024-06-20 15:15:37,478 INFO L125 PetriNetUnfolderBase]: For 29/29 co-relation queries the response was YES. [2024-06-20 15:15:37,485 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2533 conditions, 1272 events. 776/1272 cut-off events. For 29/29 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 6351 event pairs, 511 based on Foata normal form. 1/1210 useless extension candidates. Maximal degree in co-relation 2521. Up to 1186 conditions per place. [2024-06-20 15:15:37,492 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 29 selfloop transitions, 4 changer transitions 0/41 dead transitions. [2024-06-20 15:15:37,493 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 41 transitions, 163 flow [2024-06-20 15:15:37,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-20 15:15:37,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-20 15:15:37,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 81 transitions. [2024-06-20 15:15:37,504 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.675 [2024-06-20 15:15:37,505 INFO L175 Difference]: Start difference. First operand has 41 places, 31 transitions, 71 flow. Second operand 3 states and 81 transitions. [2024-06-20 15:15:37,506 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 41 transitions, 163 flow [2024-06-20 15:15:37,508 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 41 transitions, 158 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-20 15:15:37,510 INFO L231 Difference]: Finished difference. Result has 41 places, 34 transitions, 98 flow [2024-06-20 15:15:37,512 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=98, PETRI_PLACES=41, PETRI_TRANSITIONS=34} [2024-06-20 15:15:37,514 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 0 predicate places. [2024-06-20 15:15:37,514 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 34 transitions, 98 flow [2024-06-20 15:15:37,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:37,515 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:37,515 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:15:37,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-20 15:15:37,515 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:15:37,516 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:37,516 INFO L85 PathProgramCache]: Analyzing trace with hash -131900529, now seen corresponding path program 1 times [2024-06-20 15:15:37,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:37,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725990413] [2024-06-20 15:15:37,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:37,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:37,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:37,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:37,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:37,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725990413] [2024-06-20 15:15:37,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725990413] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:37,665 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:37,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-20 15:15:37,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139706071] [2024-06-20 15:15:37,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:37,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-20 15:15:37,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:37,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-20 15:15:37,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-20 15:15:37,701 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 15:15:37,701 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 34 transitions, 98 flow. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:37,701 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:37,701 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 15:15:37,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:37,846 INFO L124 PetriNetUnfolderBase]: 777/1280 cut-off events. [2024-06-20 15:15:37,846 INFO L125 PetriNetUnfolderBase]: For 229/237 co-relation queries the response was YES. [2024-06-20 15:15:37,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2914 conditions, 1280 events. 777/1280 cut-off events. For 229/237 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 6279 event pairs, 423 based on Foata normal form. 7/1255 useless extension candidates. Maximal degree in co-relation 2902. Up to 1160 conditions per place. [2024-06-20 15:15:37,852 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 38 selfloop transitions, 11 changer transitions 0/57 dead transitions. [2024-06-20 15:15:37,852 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 57 transitions, 260 flow [2024-06-20 15:15:37,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-20 15:15:37,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-20 15:15:37,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 110 transitions. [2024-06-20 15:15:37,856 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6875 [2024-06-20 15:15:37,856 INFO L175 Difference]: Start difference. First operand has 41 places, 34 transitions, 98 flow. Second operand 4 states and 110 transitions. [2024-06-20 15:15:37,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 57 transitions, 260 flow [2024-06-20 15:15:37,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 57 transitions, 256 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-20 15:15:37,861 INFO L231 Difference]: Finished difference. Result has 45 places, 42 transitions, 170 flow [2024-06-20 15:15:37,861 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=170, PETRI_PLACES=45, PETRI_TRANSITIONS=42} [2024-06-20 15:15:37,861 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 4 predicate places. [2024-06-20 15:15:37,862 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 42 transitions, 170 flow [2024-06-20 15:15:37,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:37,862 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:37,863 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:15:37,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-20 15:15:37,865 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:15:37,867 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:37,867 INFO L85 PathProgramCache]: Analyzing trace with hash 206052061, now seen corresponding path program 1 times [2024-06-20 15:15:37,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:37,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145061552] [2024-06-20 15:15:37,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:37,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:37,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:38,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:38,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:38,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145061552] [2024-06-20 15:15:38,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145061552] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:38,001 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:38,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-20 15:15:38,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239135840] [2024-06-20 15:15:38,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:38,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-20 15:15:38,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:38,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-20 15:15:38,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-20 15:15:38,032 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 15:15:38,034 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 42 transitions, 170 flow. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:38,034 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:38,034 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 15:15:38,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:38,157 INFO L124 PetriNetUnfolderBase]: 815/1351 cut-off events. [2024-06-20 15:15:38,157 INFO L125 PetriNetUnfolderBase]: For 979/995 co-relation queries the response was YES. [2024-06-20 15:15:38,159 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3620 conditions, 1351 events. 815/1351 cut-off events. For 979/995 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 6633 event pairs, 249 based on Foata normal form. 11/1352 useless extension candidates. Maximal degree in co-relation 3605. Up to 1090 conditions per place. [2024-06-20 15:15:38,167 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 55 selfloop transitions, 21 changer transitions 0/84 dead transitions. [2024-06-20 15:15:38,167 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 84 transitions, 468 flow [2024-06-20 15:15:38,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 15:15:38,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 15:15:38,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 144 transitions. [2024-06-20 15:15:38,171 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.72 [2024-06-20 15:15:38,172 INFO L175 Difference]: Start difference. First operand has 45 places, 42 transitions, 170 flow. Second operand 5 states and 144 transitions. [2024-06-20 15:15:38,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 84 transitions, 468 flow [2024-06-20 15:15:38,175 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 84 transitions, 464 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-06-20 15:15:38,177 INFO L231 Difference]: Finished difference. Result has 52 places, 56 transitions, 312 flow [2024-06-20 15:15:38,177 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=312, PETRI_PLACES=52, PETRI_TRANSITIONS=56} [2024-06-20 15:15:38,178 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 11 predicate places. [2024-06-20 15:15:38,178 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 56 transitions, 312 flow [2024-06-20 15:15:38,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:38,178 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:38,178 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:15:38,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-20 15:15:38,179 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:15:38,179 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:38,179 INFO L85 PathProgramCache]: Analyzing trace with hash -410706608, now seen corresponding path program 1 times [2024-06-20 15:15:38,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:38,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151408961] [2024-06-20 15:15:38,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:38,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:38,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:38,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:38,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:38,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151408961] [2024-06-20 15:15:38,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151408961] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:38,355 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:38,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:15:38,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380688685] [2024-06-20 15:15:38,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:38,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:15:38,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:38,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:15:38,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:15:38,381 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 15:15:38,382 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 56 transitions, 312 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:38,382 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:38,382 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 15:15:38,382 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:38,562 INFO L124 PetriNetUnfolderBase]: 903/1493 cut-off events. [2024-06-20 15:15:38,562 INFO L125 PetriNetUnfolderBase]: For 2620/2653 co-relation queries the response was YES. [2024-06-20 15:15:38,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4981 conditions, 1493 events. 903/1493 cut-off events. For 2620/2653 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 7509 event pairs, 161 based on Foata normal form. 38/1521 useless extension candidates. Maximal degree in co-relation 4961. Up to 1094 conditions per place. [2024-06-20 15:15:38,572 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 62 selfloop transitions, 24 changer transitions 0/94 dead transitions. [2024-06-20 15:15:38,572 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 94 transitions, 632 flow [2024-06-20 15:15:38,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:15:38,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:15:38,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 169 transitions. [2024-06-20 15:15:38,574 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7041666666666667 [2024-06-20 15:15:38,574 INFO L175 Difference]: Start difference. First operand has 52 places, 56 transitions, 312 flow. Second operand 6 states and 169 transitions. [2024-06-20 15:15:38,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 94 transitions, 632 flow [2024-06-20 15:15:38,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 94 transitions, 620 flow, removed 6 selfloop flow, removed 0 redundant places. [2024-06-20 15:15:38,579 INFO L231 Difference]: Finished difference. Result has 57 places, 58 transitions, 377 flow [2024-06-20 15:15:38,579 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=292, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=377, PETRI_PLACES=57, PETRI_TRANSITIONS=58} [2024-06-20 15:15:38,579 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 16 predicate places. [2024-06-20 15:15:38,580 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 58 transitions, 377 flow [2024-06-20 15:15:38,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:38,580 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:38,580 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:15:38,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-20 15:15:38,580 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:15:38,581 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:38,581 INFO L85 PathProgramCache]: Analyzing trace with hash -1224206505, now seen corresponding path program 1 times [2024-06-20 15:15:38,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:38,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717913783] [2024-06-20 15:15:38,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:38,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:38,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:38,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:38,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:38,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717913783] [2024-06-20 15:15:38,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717913783] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:38,675 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:38,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-20 15:15:38,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552660668] [2024-06-20 15:15:38,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:38,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-20 15:15:38,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:38,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-20 15:15:38,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-20 15:15:38,700 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 15:15:38,700 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 58 transitions, 377 flow. Second operand has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:38,700 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:38,700 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 15:15:38,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:38,804 INFO L124 PetriNetUnfolderBase]: 898/1485 cut-off events. [2024-06-20 15:15:38,804 INFO L125 PetriNetUnfolderBase]: For 3294/3313 co-relation queries the response was YES. [2024-06-20 15:15:38,807 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5451 conditions, 1485 events. 898/1485 cut-off events. For 3294/3313 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 7564 event pairs, 292 based on Foata normal form. 11/1495 useless extension candidates. Maximal degree in co-relation 5428. Up to 1369 conditions per place. [2024-06-20 15:15:38,814 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 57 selfloop transitions, 7 changer transitions 0/72 dead transitions. [2024-06-20 15:15:38,814 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 72 transitions, 564 flow [2024-06-20 15:15:38,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-20 15:15:38,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-20 15:15:38,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 101 transitions. [2024-06-20 15:15:38,815 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.63125 [2024-06-20 15:15:38,816 INFO L175 Difference]: Start difference. First operand has 57 places, 58 transitions, 377 flow. Second operand 4 states and 101 transitions. [2024-06-20 15:15:38,816 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 72 transitions, 564 flow [2024-06-20 15:15:38,819 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 72 transitions, 505 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-20 15:15:38,820 INFO L231 Difference]: Finished difference. Result has 57 places, 61 transitions, 377 flow [2024-06-20 15:15:38,820 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=322, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=377, PETRI_PLACES=57, PETRI_TRANSITIONS=61} [2024-06-20 15:15:38,821 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 16 predicate places. [2024-06-20 15:15:38,821 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 61 transitions, 377 flow [2024-06-20 15:15:38,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:38,821 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:38,821 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:15:38,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-20 15:15:38,822 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:15:38,822 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:38,822 INFO L85 PathProgramCache]: Analyzing trace with hash 703353189, now seen corresponding path program 1 times [2024-06-20 15:15:38,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:38,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891597346] [2024-06-20 15:15:38,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:38,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:38,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:38,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:38,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:38,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891597346] [2024-06-20 15:15:38,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891597346] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:38,911 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:38,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-20 15:15:38,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661760350] [2024-06-20 15:15:38,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:38,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-20 15:15:38,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:38,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-20 15:15:38,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-20 15:15:38,938 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:15:38,939 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 61 transitions, 377 flow. Second operand has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:38,939 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:38,939 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:15:38,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:39,114 INFO L124 PetriNetUnfolderBase]: 1064/1754 cut-off events. [2024-06-20 15:15:39,114 INFO L125 PetriNetUnfolderBase]: For 3954/3954 co-relation queries the response was YES. [2024-06-20 15:15:39,118 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6104 conditions, 1754 events. 1064/1754 cut-off events. For 3954/3954 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 9023 event pairs, 373 based on Foata normal form. 2/1755 useless extension candidates. Maximal degree in co-relation 6080. Up to 1602 conditions per place. [2024-06-20 15:15:39,125 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 68 selfloop transitions, 10 changer transitions 0/85 dead transitions. [2024-06-20 15:15:39,125 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 85 transitions, 630 flow [2024-06-20 15:15:39,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 15:15:39,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 15:15:39,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 119 transitions. [2024-06-20 15:15:39,126 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.595 [2024-06-20 15:15:39,126 INFO L175 Difference]: Start difference. First operand has 57 places, 61 transitions, 377 flow. Second operand 5 states and 119 transitions. [2024-06-20 15:15:39,127 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 85 transitions, 630 flow [2024-06-20 15:15:39,131 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 85 transitions, 597 flow, removed 9 selfloop flow, removed 2 redundant places. [2024-06-20 15:15:39,133 INFO L231 Difference]: Finished difference. Result has 62 places, 70 transitions, 453 flow [2024-06-20 15:15:39,133 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=353, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=453, PETRI_PLACES=62, PETRI_TRANSITIONS=70} [2024-06-20 15:15:39,135 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 21 predicate places. [2024-06-20 15:15:39,135 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 70 transitions, 453 flow [2024-06-20 15:15:39,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:39,135 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:39,135 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:15:39,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-20 15:15:39,136 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:15:39,136 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:39,136 INFO L85 PathProgramCache]: Analyzing trace with hash -563189036, now seen corresponding path program 1 times [2024-06-20 15:15:39,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:39,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359281060] [2024-06-20 15:15:39,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:39,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:39,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:39,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:39,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:39,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359281060] [2024-06-20 15:15:39,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359281060] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:39,239 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:39,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-20 15:15:39,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353354321] [2024-06-20 15:15:39,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:39,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-20 15:15:39,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:39,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-20 15:15:39,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-20 15:15:39,273 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 15:15:39,273 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 70 transitions, 453 flow. Second operand has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:39,273 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:39,273 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 15:15:39,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:39,431 INFO L124 PetriNetUnfolderBase]: 1000/1639 cut-off events. [2024-06-20 15:15:39,431 INFO L125 PetriNetUnfolderBase]: For 5364/5413 co-relation queries the response was YES. [2024-06-20 15:15:39,435 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6336 conditions, 1639 events. 1000/1639 cut-off events. For 5364/5413 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 8330 event pairs, 303 based on Foata normal form. 16/1637 useless extension candidates. Maximal degree in co-relation 6309. Up to 1359 conditions per place. [2024-06-20 15:15:39,442 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 57 selfloop transitions, 29 changer transitions 0/97 dead transitions. [2024-06-20 15:15:39,442 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 97 transitions, 759 flow [2024-06-20 15:15:39,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 15:15:39,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 15:15:39,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 138 transitions. [2024-06-20 15:15:39,443 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.69 [2024-06-20 15:15:39,443 INFO L175 Difference]: Start difference. First operand has 62 places, 70 transitions, 453 flow. Second operand 5 states and 138 transitions. [2024-06-20 15:15:39,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 97 transitions, 759 flow [2024-06-20 15:15:39,447 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 97 transitions, 755 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-06-20 15:15:39,448 INFO L231 Difference]: Finished difference. Result has 67 places, 74 transitions, 550 flow [2024-06-20 15:15:39,448 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=449, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=550, PETRI_PLACES=67, PETRI_TRANSITIONS=74} [2024-06-20 15:15:39,449 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 26 predicate places. [2024-06-20 15:15:39,449 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 74 transitions, 550 flow [2024-06-20 15:15:39,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:39,450 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:39,450 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:15:39,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-20 15:15:39,450 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:15:39,451 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:39,451 INFO L85 PathProgramCache]: Analyzing trace with hash 358598134, now seen corresponding path program 2 times [2024-06-20 15:15:39,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:39,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224006440] [2024-06-20 15:15:39,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:39,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:39,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:39,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:39,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:39,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224006440] [2024-06-20 15:15:39,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224006440] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:39,537 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:39,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-20 15:15:39,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732641237] [2024-06-20 15:15:39,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:39,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-20 15:15:39,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:39,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-20 15:15:39,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-20 15:15:39,558 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 15:15:39,558 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 74 transitions, 550 flow. Second operand has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:39,558 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:39,558 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 15:15:39,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:39,712 INFO L124 PetriNetUnfolderBase]: 1017/1664 cut-off events. [2024-06-20 15:15:39,712 INFO L125 PetriNetUnfolderBase]: For 6492/6537 co-relation queries the response was YES. [2024-06-20 15:15:39,716 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6823 conditions, 1664 events. 1017/1664 cut-off events. For 6492/6537 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 8521 event pairs, 316 based on Foata normal form. 23/1670 useless extension candidates. Maximal degree in co-relation 6793. Up to 1381 conditions per place. [2024-06-20 15:15:39,725 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 53 selfloop transitions, 32 changer transitions 0/96 dead transitions. [2024-06-20 15:15:39,725 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 96 transitions, 831 flow [2024-06-20 15:15:39,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 15:15:39,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 15:15:39,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 133 transitions. [2024-06-20 15:15:39,726 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.665 [2024-06-20 15:15:39,726 INFO L175 Difference]: Start difference. First operand has 67 places, 74 transitions, 550 flow. Second operand 5 states and 133 transitions. [2024-06-20 15:15:39,727 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 96 transitions, 831 flow [2024-06-20 15:15:39,733 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 96 transitions, 782 flow, removed 5 selfloop flow, removed 2 redundant places. [2024-06-20 15:15:39,734 INFO L231 Difference]: Finished difference. Result has 72 places, 79 transitions, 659 flow [2024-06-20 15:15:39,735 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=507, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=659, PETRI_PLACES=72, PETRI_TRANSITIONS=79} [2024-06-20 15:15:39,737 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 31 predicate places. [2024-06-20 15:15:39,737 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 79 transitions, 659 flow [2024-06-20 15:15:39,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:39,737 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:39,737 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:15:39,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-20 15:15:39,738 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:15:39,738 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:39,739 INFO L85 PathProgramCache]: Analyzing trace with hash 1712358566, now seen corresponding path program 1 times [2024-06-20 15:15:39,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:39,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770939022] [2024-06-20 15:15:39,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:39,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:39,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:39,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:39,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:39,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770939022] [2024-06-20 15:15:39,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770939022] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:39,850 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:39,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:15:39,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301512426] [2024-06-20 15:15:39,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:39,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:15:39,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:39,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:15:39,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:15:39,873 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:15:39,873 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 79 transitions, 659 flow. Second operand has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:39,873 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:39,873 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:15:39,873 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:40,036 INFO L124 PetriNetUnfolderBase]: 1087/1783 cut-off events. [2024-06-20 15:15:40,036 INFO L125 PetriNetUnfolderBase]: For 7878/7878 co-relation queries the response was YES. [2024-06-20 15:15:40,040 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7434 conditions, 1783 events. 1087/1783 cut-off events. For 7878/7878 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 9091 event pairs, 320 based on Foata normal form. 4/1783 useless extension candidates. Maximal degree in co-relation 7401. Up to 1505 conditions per place. [2024-06-20 15:15:40,053 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 93 selfloop transitions, 22 changer transitions 0/122 dead transitions. [2024-06-20 15:15:40,053 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 122 transitions, 1135 flow [2024-06-20 15:15:40,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:15:40,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:15:40,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 152 transitions. [2024-06-20 15:15:40,054 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6333333333333333 [2024-06-20 15:15:40,055 INFO L175 Difference]: Start difference. First operand has 72 places, 79 transitions, 659 flow. Second operand 6 states and 152 transitions. [2024-06-20 15:15:40,055 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 122 transitions, 1135 flow [2024-06-20 15:15:40,064 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 122 transitions, 1033 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-20 15:15:40,069 INFO L231 Difference]: Finished difference. Result has 76 places, 93 transitions, 763 flow [2024-06-20 15:15:40,070 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=579, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=763, PETRI_PLACES=76, PETRI_TRANSITIONS=93} [2024-06-20 15:15:40,070 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 35 predicate places. [2024-06-20 15:15:40,070 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 93 transitions, 763 flow [2024-06-20 15:15:40,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:40,071 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:40,071 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:15:40,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-20 15:15:40,071 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:15:40,071 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:40,072 INFO L85 PathProgramCache]: Analyzing trace with hash -1768122014, now seen corresponding path program 2 times [2024-06-20 15:15:40,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:40,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598456354] [2024-06-20 15:15:40,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:40,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:40,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:40,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:40,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:40,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598456354] [2024-06-20 15:15:40,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598456354] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:40,176 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:40,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:15:40,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234901168] [2024-06-20 15:15:40,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:40,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:15:40,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:40,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:15:40,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:15:40,206 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:15:40,207 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 93 transitions, 763 flow. Second operand has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:40,207 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:40,207 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:15:40,207 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:40,370 INFO L124 PetriNetUnfolderBase]: 1098/1797 cut-off events. [2024-06-20 15:15:40,371 INFO L125 PetriNetUnfolderBase]: For 9399/9399 co-relation queries the response was YES. [2024-06-20 15:15:40,376 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7902 conditions, 1797 events. 1098/1797 cut-off events. For 9399/9399 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 9120 event pairs, 334 based on Foata normal form. 2/1793 useless extension candidates. Maximal degree in co-relation 7866. Up to 1512 conditions per place. [2024-06-20 15:15:40,383 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 89 selfloop transitions, 31 changer transitions 0/127 dead transitions. [2024-06-20 15:15:40,383 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 127 transitions, 1216 flow [2024-06-20 15:15:40,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:15:40,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:15:40,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 152 transitions. [2024-06-20 15:15:40,384 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6333333333333333 [2024-06-20 15:15:40,384 INFO L175 Difference]: Start difference. First operand has 76 places, 93 transitions, 763 flow. Second operand 6 states and 152 transitions. [2024-06-20 15:15:40,385 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 127 transitions, 1216 flow [2024-06-20 15:15:40,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 127 transitions, 1176 flow, removed 12 selfloop flow, removed 2 redundant places. [2024-06-20 15:15:40,403 INFO L231 Difference]: Finished difference. Result has 81 places, 102 transitions, 881 flow [2024-06-20 15:15:40,403 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=729, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=881, PETRI_PLACES=81, PETRI_TRANSITIONS=102} [2024-06-20 15:15:40,404 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 40 predicate places. [2024-06-20 15:15:40,404 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 102 transitions, 881 flow [2024-06-20 15:15:40,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:40,404 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:40,404 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:15:40,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-20 15:15:40,405 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:15:40,405 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:40,405 INFO L85 PathProgramCache]: Analyzing trace with hash -274348732, now seen corresponding path program 3 times [2024-06-20 15:15:40,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:40,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698514707] [2024-06-20 15:15:40,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:40,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:40,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:40,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:40,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:40,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698514707] [2024-06-20 15:15:40,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698514707] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:40,495 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:40,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:15:40,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023311799] [2024-06-20 15:15:40,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:40,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:15:40,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:40,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:15:40,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:15:40,525 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:15:40,525 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 102 transitions, 881 flow. Second operand has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:40,525 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:40,526 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:15:40,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:40,698 INFO L124 PetriNetUnfolderBase]: 1093/1790 cut-off events. [2024-06-20 15:15:40,699 INFO L125 PetriNetUnfolderBase]: For 10908/10908 co-relation queries the response was YES. [2024-06-20 15:15:40,704 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8129 conditions, 1790 events. 1093/1790 cut-off events. For 10908/10908 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 9094 event pairs, 334 based on Foata normal form. 2/1786 useless extension candidates. Maximal degree in co-relation 8091. Up to 1509 conditions per place. [2024-06-20 15:15:40,711 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 88 selfloop transitions, 30 changer transitions 0/125 dead transitions. [2024-06-20 15:15:40,711 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 125 transitions, 1224 flow [2024-06-20 15:15:40,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:15:40,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:15:40,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-20 15:15:40,712 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-20 15:15:40,712 INFO L175 Difference]: Start difference. First operand has 81 places, 102 transitions, 881 flow. Second operand 6 states and 150 transitions. [2024-06-20 15:15:40,712 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 125 transitions, 1224 flow [2024-06-20 15:15:40,723 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 125 transitions, 1208 flow, removed 8 selfloop flow, removed 0 redundant places. [2024-06-20 15:15:40,725 INFO L231 Difference]: Finished difference. Result has 87 places, 102 transitions, 933 flow [2024-06-20 15:15:40,725 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=865, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=933, PETRI_PLACES=87, PETRI_TRANSITIONS=102} [2024-06-20 15:15:40,726 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 46 predicate places. [2024-06-20 15:15:40,726 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 102 transitions, 933 flow [2024-06-20 15:15:40,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:40,726 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:40,726 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:15:40,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-20 15:15:40,726 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:15:40,727 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:40,727 INFO L85 PathProgramCache]: Analyzing trace with hash -101612764, now seen corresponding path program 1 times [2024-06-20 15:15:40,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:40,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062310613] [2024-06-20 15:15:40,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:40,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:40,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:40,836 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:40,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:40,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062310613] [2024-06-20 15:15:40,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062310613] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:40,837 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:40,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:15:40,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639060903] [2024-06-20 15:15:40,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:40,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:15:40,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:40,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:15:40,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:15:40,867 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:15:40,867 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 102 transitions, 933 flow. Second operand has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:40,867 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:40,867 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:15:40,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:41,078 INFO L124 PetriNetUnfolderBase]: 1085/1783 cut-off events. [2024-06-20 15:15:41,078 INFO L125 PetriNetUnfolderBase]: For 12094/12094 co-relation queries the response was YES. [2024-06-20 15:15:41,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8296 conditions, 1783 events. 1085/1783 cut-off events. For 12094/12094 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 9052 event pairs, 298 based on Foata normal form. 4/1786 useless extension candidates. Maximal degree in co-relation 8255. Up to 1612 conditions per place. [2024-06-20 15:15:41,091 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 105 selfloop transitions, 12 changer transitions 0/124 dead transitions. [2024-06-20 15:15:41,091 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 124 transitions, 1229 flow [2024-06-20 15:15:41,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:15:41,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:15:41,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 140 transitions. [2024-06-20 15:15:41,093 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-06-20 15:15:41,093 INFO L175 Difference]: Start difference. First operand has 87 places, 102 transitions, 933 flow. Second operand 6 states and 140 transitions. [2024-06-20 15:15:41,093 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 124 transitions, 1229 flow [2024-06-20 15:15:41,106 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 124 transitions, 1164 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-20 15:15:41,107 INFO L231 Difference]: Finished difference. Result has 89 places, 104 transitions, 915 flow [2024-06-20 15:15:41,108 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=868, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=915, PETRI_PLACES=89, PETRI_TRANSITIONS=104} [2024-06-20 15:15:41,108 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 48 predicate places. [2024-06-20 15:15:41,109 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 104 transitions, 915 flow [2024-06-20 15:15:41,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:41,109 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:41,109 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:15:41,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-20 15:15:41,109 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:15:41,110 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:41,110 INFO L85 PathProgramCache]: Analyzing trace with hash -58766246, now seen corresponding path program 1 times [2024-06-20 15:15:41,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:41,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503076519] [2024-06-20 15:15:41,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:41,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:41,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:41,208 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:41,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:41,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503076519] [2024-06-20 15:15:41,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503076519] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:41,209 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:41,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:15:41,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964219184] [2024-06-20 15:15:41,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:41,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:15:41,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:41,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:15:41,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:15:41,239 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:15:41,240 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 104 transitions, 915 flow. Second operand has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:41,240 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:41,240 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:15:41,240 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:41,407 INFO L124 PetriNetUnfolderBase]: 1112/1832 cut-off events. [2024-06-20 15:15:41,407 INFO L125 PetriNetUnfolderBase]: For 13574/13574 co-relation queries the response was YES. [2024-06-20 15:15:41,413 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8641 conditions, 1832 events. 1112/1832 cut-off events. For 13574/13574 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 9395 event pairs, 316 based on Foata normal form. 2/1830 useless extension candidates. Maximal degree in co-relation 8599. Up to 1526 conditions per place. [2024-06-20 15:15:41,420 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 98 selfloop transitions, 33 changer transitions 0/138 dead transitions. [2024-06-20 15:15:41,421 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 138 transitions, 1402 flow [2024-06-20 15:15:41,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:15:41,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:15:41,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-06-20 15:15:41,422 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6375 [2024-06-20 15:15:41,422 INFO L175 Difference]: Start difference. First operand has 89 places, 104 transitions, 915 flow. Second operand 6 states and 153 transitions. [2024-06-20 15:15:41,422 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 138 transitions, 1402 flow [2024-06-20 15:15:41,437 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 138 transitions, 1373 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-20 15:15:41,441 INFO L231 Difference]: Finished difference. Result has 92 places, 111 transitions, 1035 flow [2024-06-20 15:15:41,441 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=886, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1035, PETRI_PLACES=92, PETRI_TRANSITIONS=111} [2024-06-20 15:15:41,442 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 51 predicate places. [2024-06-20 15:15:41,442 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 111 transitions, 1035 flow [2024-06-20 15:15:41,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:41,442 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:41,442 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:15:41,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-20 15:15:41,442 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:15:41,443 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:41,443 INFO L85 PathProgramCache]: Analyzing trace with hash -58771826, now seen corresponding path program 2 times [2024-06-20 15:15:41,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:41,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870612739] [2024-06-20 15:15:41,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:41,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:41,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:41,535 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:41,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:41,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870612739] [2024-06-20 15:15:41,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870612739] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:41,536 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:41,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:15:41,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630326781] [2024-06-20 15:15:41,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:41,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:15:41,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:41,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:15:41,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:15:41,560 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:15:41,561 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 111 transitions, 1035 flow. Second operand has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:41,561 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:41,561 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:15:41,561 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:41,729 INFO L124 PetriNetUnfolderBase]: 1107/1825 cut-off events. [2024-06-20 15:15:41,729 INFO L125 PetriNetUnfolderBase]: For 15130/15130 co-relation queries the response was YES. [2024-06-20 15:15:41,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8877 conditions, 1825 events. 1107/1825 cut-off events. For 15130/15130 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 9339 event pairs, 316 based on Foata normal form. 2/1823 useless extension candidates. Maximal degree in co-relation 8833. Up to 1521 conditions per place. [2024-06-20 15:15:41,741 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 96 selfloop transitions, 37 changer transitions 0/140 dead transitions. [2024-06-20 15:15:41,741 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 140 transitions, 1439 flow [2024-06-20 15:15:41,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:15:41,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:15:41,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 155 transitions. [2024-06-20 15:15:41,743 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6458333333333334 [2024-06-20 15:15:41,743 INFO L175 Difference]: Start difference. First operand has 92 places, 111 transitions, 1035 flow. Second operand 6 states and 155 transitions. [2024-06-20 15:15:41,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 140 transitions, 1439 flow [2024-06-20 15:15:41,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 140 transitions, 1397 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-20 15:15:41,759 INFO L231 Difference]: Finished difference. Result has 97 places, 113 transitions, 1116 flow [2024-06-20 15:15:41,760 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=994, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1116, PETRI_PLACES=97, PETRI_TRANSITIONS=113} [2024-06-20 15:15:41,760 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 56 predicate places. [2024-06-20 15:15:41,761 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 113 transitions, 1116 flow [2024-06-20 15:15:41,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:41,761 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:41,761 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:15:41,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-20 15:15:41,761 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:15:41,762 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:41,762 INFO L85 PathProgramCache]: Analyzing trace with hash 1022792798, now seen corresponding path program 3 times [2024-06-20 15:15:41,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:41,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905729496] [2024-06-20 15:15:41,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:41,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:41,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:41,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:41,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:41,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905729496] [2024-06-20 15:15:41,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905729496] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:41,847 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:41,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:15:41,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617858077] [2024-06-20 15:15:41,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:41,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:15:41,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:41,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:15:41,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:15:41,871 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:15:41,872 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 113 transitions, 1116 flow. Second operand has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:41,872 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:41,872 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:15:41,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:42,052 INFO L124 PetriNetUnfolderBase]: 1102/1821 cut-off events. [2024-06-20 15:15:42,053 INFO L125 PetriNetUnfolderBase]: For 17664/17667 co-relation queries the response was YES. [2024-06-20 15:15:42,058 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9067 conditions, 1821 events. 1102/1821 cut-off events. For 17664/17667 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 9338 event pairs, 342 based on Foata normal form. 4/1817 useless extension candidates. Maximal degree in co-relation 9021. Up to 1516 conditions per place. [2024-06-20 15:15:42,064 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 93 selfloop transitions, 33 changer transitions 0/133 dead transitions. [2024-06-20 15:15:42,064 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 133 transitions, 1427 flow [2024-06-20 15:15:42,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:15:42,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:15:42,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 145 transitions. [2024-06-20 15:15:42,066 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6041666666666666 [2024-06-20 15:15:42,066 INFO L175 Difference]: Start difference. First operand has 97 places, 113 transitions, 1116 flow. Second operand 6 states and 145 transitions. [2024-06-20 15:15:42,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 133 transitions, 1427 flow [2024-06-20 15:15:42,081 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 133 transitions, 1377 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-06-20 15:15:42,083 INFO L231 Difference]: Finished difference. Result has 100 places, 114 transitions, 1151 flow [2024-06-20 15:15:42,083 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1067, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1151, PETRI_PLACES=100, PETRI_TRANSITIONS=114} [2024-06-20 15:15:42,084 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 59 predicate places. [2024-06-20 15:15:42,084 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 114 transitions, 1151 flow [2024-06-20 15:15:42,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:42,085 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:42,085 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:15:42,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-20 15:15:42,085 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:15:42,085 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:42,086 INFO L85 PathProgramCache]: Analyzing trace with hash -2118063951, now seen corresponding path program 1 times [2024-06-20 15:15:42,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:42,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592505380] [2024-06-20 15:15:42,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:42,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:42,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:42,200 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:42,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:42,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592505380] [2024-06-20 15:15:42,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592505380] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:42,204 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:42,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-20 15:15:42,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768834392] [2024-06-20 15:15:42,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:42,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-20 15:15:42,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:42,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-20 15:15:42,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-20 15:15:42,226 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:15:42,226 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 114 transitions, 1151 flow. Second operand has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:42,226 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:42,226 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:15:42,226 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:42,371 INFO L124 PetriNetUnfolderBase]: 1078/1764 cut-off events. [2024-06-20 15:15:42,372 INFO L125 PetriNetUnfolderBase]: For 17966/17973 co-relation queries the response was YES. [2024-06-20 15:15:42,377 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8979 conditions, 1764 events. 1078/1764 cut-off events. For 17966/17973 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 8883 event pairs, 314 based on Foata normal form. 8/1770 useless extension candidates. Maximal degree in co-relation 8932. Up to 1603 conditions per place. [2024-06-20 15:15:42,383 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 101 selfloop transitions, 14 changer transitions 0/122 dead transitions. [2024-06-20 15:15:42,383 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 122 transitions, 1401 flow [2024-06-20 15:15:42,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-20 15:15:42,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-20 15:15:42,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 98 transitions. [2024-06-20 15:15:42,384 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6125 [2024-06-20 15:15:42,384 INFO L175 Difference]: Start difference. First operand has 100 places, 114 transitions, 1151 flow. Second operand 4 states and 98 transitions. [2024-06-20 15:15:42,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 122 transitions, 1401 flow [2024-06-20 15:15:42,402 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 122 transitions, 1350 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-06-20 15:15:42,433 INFO L231 Difference]: Finished difference. Result has 101 places, 114 transitions, 1136 flow [2024-06-20 15:15:42,434 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1100, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1136, PETRI_PLACES=101, PETRI_TRANSITIONS=114} [2024-06-20 15:15:42,434 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 60 predicate places. [2024-06-20 15:15:42,434 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 114 transitions, 1136 flow [2024-06-20 15:15:42,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:42,434 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:42,434 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:15:42,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-20 15:15:42,435 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:15:42,435 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:42,435 INFO L85 PathProgramCache]: Analyzing trace with hash -1228387191, now seen corresponding path program 1 times [2024-06-20 15:15:42,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:42,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187945922] [2024-06-20 15:15:42,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:42,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:42,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:42,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:42,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:42,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187945922] [2024-06-20 15:15:42,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187945922] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:42,545 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:42,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:15:42,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524762033] [2024-06-20 15:15:42,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:42,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:15:42,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:42,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:15:42,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:15:42,585 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 15:15:42,586 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 114 transitions, 1136 flow. Second operand has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:42,586 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:42,586 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 15:15:42,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:42,801 INFO L124 PetriNetUnfolderBase]: 1201/1965 cut-off events. [2024-06-20 15:15:42,801 INFO L125 PetriNetUnfolderBase]: For 26241/26249 co-relation queries the response was YES. [2024-06-20 15:15:42,808 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10169 conditions, 1965 events. 1201/1965 cut-off events. For 26241/26249 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 10342 event pairs, 207 based on Foata normal form. 20/1930 useless extension candidates. Maximal degree in co-relation 10120. Up to 1241 conditions per place. [2024-06-20 15:15:42,815 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 89 selfloop transitions, 43 changer transitions 0/154 dead transitions. [2024-06-20 15:15:42,815 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 154 transitions, 1664 flow [2024-06-20 15:15:42,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:15:42,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:15:42,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 167 transitions. [2024-06-20 15:15:42,817 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6958333333333333 [2024-06-20 15:15:42,817 INFO L175 Difference]: Start difference. First operand has 101 places, 114 transitions, 1136 flow. Second operand 6 states and 167 transitions. [2024-06-20 15:15:42,817 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 154 transitions, 1664 flow [2024-06-20 15:15:42,842 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 154 transitions, 1628 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-20 15:15:42,843 INFO L231 Difference]: Finished difference. Result has 105 places, 120 transitions, 1282 flow [2024-06-20 15:15:42,844 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1100, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1282, PETRI_PLACES=105, PETRI_TRANSITIONS=120} [2024-06-20 15:15:42,844 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 64 predicate places. [2024-06-20 15:15:42,844 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 120 transitions, 1282 flow [2024-06-20 15:15:42,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:42,845 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:42,845 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:15:42,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-20 15:15:42,845 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:15:42,845 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:42,845 INFO L85 PathProgramCache]: Analyzing trace with hash -794688431, now seen corresponding path program 2 times [2024-06-20 15:15:42,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:42,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2486262] [2024-06-20 15:15:42,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:42,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:42,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:42,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:42,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:42,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2486262] [2024-06-20 15:15:42,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2486262] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:42,939 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:42,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:15:42,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504815856] [2024-06-20 15:15:42,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:42,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:15:42,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:42,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:15:42,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:15:42,969 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 15:15:42,969 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 120 transitions, 1282 flow. Second operand has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:42,969 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:42,969 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 15:15:42,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:43,180 INFO L124 PetriNetUnfolderBase]: 1212/1981 cut-off events. [2024-06-20 15:15:43,180 INFO L125 PetriNetUnfolderBase]: For 29894/29909 co-relation queries the response was YES. [2024-06-20 15:15:43,188 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10954 conditions, 1981 events. 1212/1981 cut-off events. For 29894/29909 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 10468 event pairs, 310 based on Foata normal form. 18/1943 useless extension candidates. Maximal degree in co-relation 10904. Up to 1586 conditions per place. [2024-06-20 15:15:43,195 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 84 selfloop transitions, 43 changer transitions 0/149 dead transitions. [2024-06-20 15:15:43,196 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 149 transitions, 1667 flow [2024-06-20 15:15:43,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:15:43,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:15:43,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 162 transitions. [2024-06-20 15:15:43,197 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.675 [2024-06-20 15:15:43,197 INFO L175 Difference]: Start difference. First operand has 105 places, 120 transitions, 1282 flow. Second operand 6 states and 162 transitions. [2024-06-20 15:15:43,197 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 149 transitions, 1667 flow [2024-06-20 15:15:43,227 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 149 transitions, 1599 flow, removed 12 selfloop flow, removed 2 redundant places. [2024-06-20 15:15:43,229 INFO L231 Difference]: Finished difference. Result has 109 places, 122 transitions, 1337 flow [2024-06-20 15:15:43,229 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1214, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1337, PETRI_PLACES=109, PETRI_TRANSITIONS=122} [2024-06-20 15:15:43,230 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 68 predicate places. [2024-06-20 15:15:43,230 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 122 transitions, 1337 flow [2024-06-20 15:15:43,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:43,230 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:43,230 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:15:43,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-20 15:15:43,230 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:15:43,231 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:43,231 INFO L85 PathProgramCache]: Analyzing trace with hash -679212563, now seen corresponding path program 1 times [2024-06-20 15:15:43,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:43,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689467770] [2024-06-20 15:15:43,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:43,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:43,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:43,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:43,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:43,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689467770] [2024-06-20 15:15:43,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689467770] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:43,331 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:43,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:15:43,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309166175] [2024-06-20 15:15:43,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:43,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:15:43,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:43,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:15:43,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:15:43,366 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:15:43,366 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 122 transitions, 1337 flow. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:43,366 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:43,366 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:15:43,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:43,599 INFO L124 PetriNetUnfolderBase]: 1339/2181 cut-off events. [2024-06-20 15:15:43,599 INFO L125 PetriNetUnfolderBase]: For 31140/31140 co-relation queries the response was YES. [2024-06-20 15:15:43,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11846 conditions, 2181 events. 1339/2181 cut-off events. For 31140/31140 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 11499 event pairs, 348 based on Foata normal form. 20/2197 useless extension candidates. Maximal degree in co-relation 11794. Up to 1783 conditions per place. [2024-06-20 15:15:43,615 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 110 selfloop transitions, 37 changer transitions 0/154 dead transitions. [2024-06-20 15:15:43,615 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 154 transitions, 1735 flow [2024-06-20 15:15:43,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:15:43,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:15:43,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-06-20 15:15:43,616 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6214285714285714 [2024-06-20 15:15:43,616 INFO L175 Difference]: Start difference. First operand has 109 places, 122 transitions, 1337 flow. Second operand 7 states and 174 transitions. [2024-06-20 15:15:43,616 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 154 transitions, 1735 flow [2024-06-20 15:15:43,647 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 154 transitions, 1631 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-20 15:15:43,649 INFO L231 Difference]: Finished difference. Result has 112 places, 124 transitions, 1341 flow [2024-06-20 15:15:43,649 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1233, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1341, PETRI_PLACES=112, PETRI_TRANSITIONS=124} [2024-06-20 15:15:43,649 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 71 predicate places. [2024-06-20 15:15:43,649 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 124 transitions, 1341 flow [2024-06-20 15:15:43,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:43,650 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:43,650 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:15:43,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-20 15:15:43,650 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:15:43,650 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:43,650 INFO L85 PathProgramCache]: Analyzing trace with hash 1413911875, now seen corresponding path program 2 times [2024-06-20 15:15:43,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:43,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981408936] [2024-06-20 15:15:43,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:43,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:43,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:43,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:43,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:43,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981408936] [2024-06-20 15:15:43,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981408936] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:43,744 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:43,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:15:43,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424424325] [2024-06-20 15:15:43,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:43,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:15:43,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:43,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:15:43,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:15:43,776 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:15:43,777 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 124 transitions, 1341 flow. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:43,777 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:43,777 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:15:43,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:44,065 INFO L124 PetriNetUnfolderBase]: 1356/2198 cut-off events. [2024-06-20 15:15:44,066 INFO L125 PetriNetUnfolderBase]: For 31718/31718 co-relation queries the response was YES. [2024-06-20 15:15:44,075 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12152 conditions, 2198 events. 1356/2198 cut-off events. For 31718/31718 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 11547 event pairs, 374 based on Foata normal form. 4/2195 useless extension candidates. Maximal degree in co-relation 12099. Up to 1902 conditions per place. [2024-06-20 15:15:44,085 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 103 selfloop transitions, 40 changer transitions 0/150 dead transitions. [2024-06-20 15:15:44,085 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 150 transitions, 1713 flow [2024-06-20 15:15:44,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:15:44,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:15:44,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-06-20 15:15:44,087 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6035714285714285 [2024-06-20 15:15:44,087 INFO L175 Difference]: Start difference. First operand has 112 places, 124 transitions, 1341 flow. Second operand 7 states and 169 transitions. [2024-06-20 15:15:44,087 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 150 transitions, 1713 flow [2024-06-20 15:15:44,126 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 150 transitions, 1627 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-20 15:15:44,128 INFO L231 Difference]: Finished difference. Result has 114 places, 126 transitions, 1372 flow [2024-06-20 15:15:44,128 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1255, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1372, PETRI_PLACES=114, PETRI_TRANSITIONS=126} [2024-06-20 15:15:44,129 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 73 predicate places. [2024-06-20 15:15:44,129 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 126 transitions, 1372 flow [2024-06-20 15:15:44,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:44,129 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:44,129 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:15:44,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-20 15:15:44,129 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:15:44,130 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:44,130 INFO L85 PathProgramCache]: Analyzing trace with hash -813502781, now seen corresponding path program 3 times [2024-06-20 15:15:44,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:44,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295841988] [2024-06-20 15:15:44,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:44,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:44,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:44,235 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:44,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:44,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295841988] [2024-06-20 15:15:44,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295841988] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:44,235 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:44,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:15:44,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855342606] [2024-06-20 15:15:44,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:44,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:15:44,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:44,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:15:44,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:15:44,261 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:15:44,261 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 126 transitions, 1372 flow. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:44,261 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:44,262 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:15:44,262 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:44,513 INFO L124 PetriNetUnfolderBase]: 1373/2225 cut-off events. [2024-06-20 15:15:44,513 INFO L125 PetriNetUnfolderBase]: For 34729/34729 co-relation queries the response was YES. [2024-06-20 15:15:44,522 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12492 conditions, 2225 events. 1373/2225 cut-off events. For 34729/34729 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 11747 event pairs, 379 based on Foata normal form. 4/2222 useless extension candidates. Maximal degree in co-relation 12438. Up to 1929 conditions per place. [2024-06-20 15:15:44,531 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 104 selfloop transitions, 41 changer transitions 0/152 dead transitions. [2024-06-20 15:15:44,531 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 152 transitions, 1752 flow [2024-06-20 15:15:44,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:15:44,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:15:44,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-06-20 15:15:44,532 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6035714285714285 [2024-06-20 15:15:44,532 INFO L175 Difference]: Start difference. First operand has 114 places, 126 transitions, 1372 flow. Second operand 7 states and 169 transitions. [2024-06-20 15:15:44,532 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 152 transitions, 1752 flow [2024-06-20 15:15:44,573 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 152 transitions, 1653 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-20 15:15:44,574 INFO L231 Difference]: Finished difference. Result has 116 places, 128 transitions, 1396 flow [2024-06-20 15:15:44,575 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1273, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1396, PETRI_PLACES=116, PETRI_TRANSITIONS=128} [2024-06-20 15:15:44,575 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 75 predicate places. [2024-06-20 15:15:44,575 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 128 transitions, 1396 flow [2024-06-20 15:15:44,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:44,575 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:44,576 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:15:44,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-20 15:15:44,576 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:15:44,576 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:44,576 INFO L85 PathProgramCache]: Analyzing trace with hash -813263771, now seen corresponding path program 4 times [2024-06-20 15:15:44,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:44,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545673545] [2024-06-20 15:15:44,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:44,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:44,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:44,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:44,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:44,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545673545] [2024-06-20 15:15:44,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545673545] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:44,662 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:44,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:15:44,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079625008] [2024-06-20 15:15:44,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:44,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:15:44,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:44,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:15:44,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:15:44,689 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:15:44,690 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 128 transitions, 1396 flow. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:44,690 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:44,690 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:15:44,690 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:44,918 INFO L124 PetriNetUnfolderBase]: 1365/2221 cut-off events. [2024-06-20 15:15:44,918 INFO L125 PetriNetUnfolderBase]: For 36545/36545 co-relation queries the response was YES. [2024-06-20 15:15:44,926 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12527 conditions, 2221 events. 1365/2221 cut-off events. For 36545/36545 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 11715 event pairs, 336 based on Foata normal form. 4/2218 useless extension candidates. Maximal degree in co-relation 12472. Up to 1748 conditions per place. [2024-06-20 15:15:44,934 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 103 selfloop transitions, 48 changer transitions 0/158 dead transitions. [2024-06-20 15:15:44,934 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 158 transitions, 1808 flow [2024-06-20 15:15:44,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:15:44,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:15:44,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-20 15:15:44,935 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6178571428571429 [2024-06-20 15:15:44,935 INFO L175 Difference]: Start difference. First operand has 116 places, 128 transitions, 1396 flow. Second operand 7 states and 173 transitions. [2024-06-20 15:15:44,935 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 158 transitions, 1808 flow [2024-06-20 15:15:44,973 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 158 transitions, 1703 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-20 15:15:44,975 INFO L231 Difference]: Finished difference. Result has 118 places, 130 transitions, 1432 flow [2024-06-20 15:15:44,976 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1291, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1432, PETRI_PLACES=118, PETRI_TRANSITIONS=130} [2024-06-20 15:15:44,976 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 77 predicate places. [2024-06-20 15:15:44,976 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 130 transitions, 1432 flow [2024-06-20 15:15:44,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:44,976 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:44,977 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:15:44,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-20 15:15:44,977 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:15:44,977 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:44,977 INFO L85 PathProgramCache]: Analyzing trace with hash -1021554729, now seen corresponding path program 1 times [2024-06-20 15:15:44,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:44,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912931042] [2024-06-20 15:15:44,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:44,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:44,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:45,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:45,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:45,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912931042] [2024-06-20 15:15:45,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912931042] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:45,060 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:45,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:15:45,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465640479] [2024-06-20 15:15:45,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:45,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:15:45,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:45,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:15:45,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:15:45,095 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:15:45,096 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 130 transitions, 1432 flow. Second operand has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:45,096 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:45,096 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:15:45,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:45,364 INFO L124 PetriNetUnfolderBase]: 1467/2417 cut-off events. [2024-06-20 15:15:45,364 INFO L125 PetriNetUnfolderBase]: For 44271/44271 co-relation queries the response was YES. [2024-06-20 15:15:45,372 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13609 conditions, 2417 events. 1467/2417 cut-off events. For 44271/44271 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 13207 event pairs, 291 based on Foata normal form. 12/2425 useless extension candidates. Maximal degree in co-relation 13553. Up to 1607 conditions per place. [2024-06-20 15:15:45,380 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 128 selfloop transitions, 38 changer transitions 0/173 dead transitions. [2024-06-20 15:15:45,380 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 173 transitions, 2025 flow [2024-06-20 15:15:45,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:15:45,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:15:45,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-20 15:15:45,381 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6321428571428571 [2024-06-20 15:15:45,381 INFO L175 Difference]: Start difference. First operand has 118 places, 130 transitions, 1432 flow. Second operand 7 states and 177 transitions. [2024-06-20 15:15:45,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 173 transitions, 2025 flow [2024-06-20 15:15:45,424 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 173 transitions, 1902 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-20 15:15:45,426 INFO L231 Difference]: Finished difference. Result has 122 places, 135 transitions, 1476 flow [2024-06-20 15:15:45,426 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1309, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1476, PETRI_PLACES=122, PETRI_TRANSITIONS=135} [2024-06-20 15:15:45,427 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 81 predicate places. [2024-06-20 15:15:45,427 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 135 transitions, 1476 flow [2024-06-20 15:15:45,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:45,428 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:45,428 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:15:45,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-20 15:15:45,428 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:15:45,428 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:45,428 INFO L85 PathProgramCache]: Analyzing trace with hash 1047771175, now seen corresponding path program 2 times [2024-06-20 15:15:45,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:45,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354811127] [2024-06-20 15:15:45,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:45,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:45,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:45,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:45,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:45,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354811127] [2024-06-20 15:15:45,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354811127] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:45,513 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:45,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:15:45,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857067458] [2024-06-20 15:15:45,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:45,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:15:45,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:45,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:15:45,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:15:45,548 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:15:45,548 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 135 transitions, 1476 flow. Second operand has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:45,548 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:45,548 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:15:45,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:45,807 INFO L124 PetriNetUnfolderBase]: 1508/2506 cut-off events. [2024-06-20 15:15:45,807 INFO L125 PetriNetUnfolderBase]: For 47633/47633 co-relation queries the response was YES. [2024-06-20 15:15:45,816 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14065 conditions, 2506 events. 1508/2506 cut-off events. For 47633/47633 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 13954 event pairs, 379 based on Foata normal form. 12/2514 useless extension candidates. Maximal degree in co-relation 14006. Up to 1983 conditions per place. [2024-06-20 15:15:45,824 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 125 selfloop transitions, 39 changer transitions 0/171 dead transitions. [2024-06-20 15:15:45,824 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 171 transitions, 1939 flow [2024-06-20 15:15:45,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:15:45,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:15:45,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-20 15:15:45,825 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6285714285714286 [2024-06-20 15:15:45,825 INFO L175 Difference]: Start difference. First operand has 122 places, 135 transitions, 1476 flow. Second operand 7 states and 176 transitions. [2024-06-20 15:15:45,825 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 171 transitions, 1939 flow [2024-06-20 15:15:45,879 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 171 transitions, 1880 flow, removed 13 selfloop flow, removed 2 redundant places. [2024-06-20 15:15:45,881 INFO L231 Difference]: Finished difference. Result has 128 places, 138 transitions, 1555 flow [2024-06-20 15:15:45,881 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1417, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1555, PETRI_PLACES=128, PETRI_TRANSITIONS=138} [2024-06-20 15:15:45,881 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 87 predicate places. [2024-06-20 15:15:45,882 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 138 transitions, 1555 flow [2024-06-20 15:15:45,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:45,882 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:45,882 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:15:45,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-20 15:15:45,882 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:15:45,882 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:45,882 INFO L85 PathProgramCache]: Analyzing trace with hash -645284497, now seen corresponding path program 3 times [2024-06-20 15:15:45,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:45,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707671264] [2024-06-20 15:15:45,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:45,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:45,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:45,960 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:45,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:45,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707671264] [2024-06-20 15:15:45,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707671264] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:45,961 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:45,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:15:45,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014273769] [2024-06-20 15:15:45,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:45,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:15:45,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:45,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:15:45,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:15:45,996 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:15:45,996 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 138 transitions, 1555 flow. Second operand has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:45,996 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:45,996 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:15:45,997 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:46,284 INFO L124 PetriNetUnfolderBase]: 1610/2690 cut-off events. [2024-06-20 15:15:46,285 INFO L125 PetriNetUnfolderBase]: For 55768/55768 co-relation queries the response was YES. [2024-06-20 15:15:46,294 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15377 conditions, 2690 events. 1610/2690 cut-off events. For 55768/55768 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 15321 event pairs, 344 based on Foata normal form. 12/2698 useless extension candidates. Maximal degree in co-relation 15315. Up to 2089 conditions per place. [2024-06-20 15:15:46,302 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 131 selfloop transitions, 41 changer transitions 0/179 dead transitions. [2024-06-20 15:15:46,302 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 179 transitions, 2144 flow [2024-06-20 15:15:46,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:15:46,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:15:46,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-20 15:15:46,303 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6464285714285715 [2024-06-20 15:15:46,303 INFO L175 Difference]: Start difference. First operand has 128 places, 138 transitions, 1555 flow. Second operand 7 states and 181 transitions. [2024-06-20 15:15:46,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 179 transitions, 2144 flow [2024-06-20 15:15:46,371 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 179 transitions, 2085 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-20 15:15:46,373 INFO L231 Difference]: Finished difference. Result has 133 places, 141 transitions, 1645 flow [2024-06-20 15:15:46,373 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1496, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1645, PETRI_PLACES=133, PETRI_TRANSITIONS=141} [2024-06-20 15:15:46,373 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 92 predicate places. [2024-06-20 15:15:46,374 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 141 transitions, 1645 flow [2024-06-20 15:15:46,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:46,374 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:46,374 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:15:46,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-20 15:15:46,374 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:15:46,374 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:46,374 INFO L85 PathProgramCache]: Analyzing trace with hash -645136627, now seen corresponding path program 4 times [2024-06-20 15:15:46,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:46,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049072600] [2024-06-20 15:15:46,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:46,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:46,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:46,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:46,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:46,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049072600] [2024-06-20 15:15:46,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049072600] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:46,453 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:46,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:15:46,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941799824] [2024-06-20 15:15:46,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:46,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:15:46,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:46,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:15:46,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:15:46,496 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:15:46,496 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 141 transitions, 1645 flow. Second operand has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:46,496 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:46,496 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:15:46,496 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:46,789 INFO L124 PetriNetUnfolderBase]: 1668/2788 cut-off events. [2024-06-20 15:15:46,790 INFO L125 PetriNetUnfolderBase]: For 61857/61857 co-relation queries the response was YES. [2024-06-20 15:15:46,800 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16179 conditions, 2788 events. 1668/2788 cut-off events. For 61857/61857 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 16143 event pairs, 449 based on Foata normal form. 16/2800 useless extension candidates. Maximal degree in co-relation 16114. Up to 2360 conditions per place. [2024-06-20 15:15:46,808 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 129 selfloop transitions, 39 changer transitions 0/175 dead transitions. [2024-06-20 15:15:46,808 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 175 transitions, 2093 flow [2024-06-20 15:15:46,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:15:46,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:15:46,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-20 15:15:46,809 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6285714285714286 [2024-06-20 15:15:46,809 INFO L175 Difference]: Start difference. First operand has 133 places, 141 transitions, 1645 flow. Second operand 7 states and 176 transitions. [2024-06-20 15:15:46,809 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 175 transitions, 2093 flow [2024-06-20 15:15:46,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 175 transitions, 2030 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-20 15:15:46,886 INFO L231 Difference]: Finished difference. Result has 137 places, 142 transitions, 1691 flow [2024-06-20 15:15:46,887 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1584, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1691, PETRI_PLACES=137, PETRI_TRANSITIONS=142} [2024-06-20 15:15:46,887 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 96 predicate places. [2024-06-20 15:15:46,887 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 142 transitions, 1691 flow [2024-06-20 15:15:46,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:46,887 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:46,887 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:15:46,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-20 15:15:46,887 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:15:46,888 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:46,888 INFO L85 PathProgramCache]: Analyzing trace with hash -639774247, now seen corresponding path program 5 times [2024-06-20 15:15:46,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:46,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610979246] [2024-06-20 15:15:46,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:46,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:46,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:46,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:46,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:46,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610979246] [2024-06-20 15:15:46,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610979246] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:46,964 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:46,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:15:46,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021089026] [2024-06-20 15:15:46,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:46,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:15:46,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:46,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:15:46,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:15:46,993 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:15:46,993 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 142 transitions, 1691 flow. Second operand has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:46,993 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:46,993 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:15:46,993 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:47,306 INFO L124 PetriNetUnfolderBase]: 1726/2886 cut-off events. [2024-06-20 15:15:47,306 INFO L125 PetriNetUnfolderBase]: For 66237/66237 co-relation queries the response was YES. [2024-06-20 15:15:47,317 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16813 conditions, 2886 events. 1726/2886 cut-off events. For 66237/66237 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 16915 event pairs, 459 based on Foata normal form. 16/2898 useless extension candidates. Maximal degree in co-relation 16746. Up to 2458 conditions per place. [2024-06-20 15:15:47,324 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 130 selfloop transitions, 36 changer transitions 0/173 dead transitions. [2024-06-20 15:15:47,324 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 173 transitions, 2127 flow [2024-06-20 15:15:47,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:15:47,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:15:47,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-20 15:15:47,325 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6142857142857143 [2024-06-20 15:15:47,325 INFO L175 Difference]: Start difference. First operand has 137 places, 142 transitions, 1691 flow. Second operand 7 states and 172 transitions. [2024-06-20 15:15:47,325 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 173 transitions, 2127 flow [2024-06-20 15:15:47,394 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 173 transitions, 2058 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-20 15:15:47,396 INFO L231 Difference]: Finished difference. Result has 140 places, 143 transitions, 1725 flow [2024-06-20 15:15:47,396 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1622, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1725, PETRI_PLACES=140, PETRI_TRANSITIONS=143} [2024-06-20 15:15:47,396 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 99 predicate places. [2024-06-20 15:15:47,396 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 143 transitions, 1725 flow [2024-06-20 15:15:47,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:47,396 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:47,396 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:15:47,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-20 15:15:47,397 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:15:47,397 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:47,397 INFO L85 PathProgramCache]: Analyzing trace with hash 419247411, now seen corresponding path program 1 times [2024-06-20 15:15:47,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:47,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162030933] [2024-06-20 15:15:47,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:47,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:47,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:47,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:47,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:47,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162030933] [2024-06-20 15:15:47,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162030933] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:47,474 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:47,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:15:47,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065253323] [2024-06-20 15:15:47,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:47,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:15:47,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:47,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:15:47,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:15:47,499 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:15:47,499 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 143 transitions, 1725 flow. Second operand has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:47,499 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:47,499 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:15:47,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:47,866 INFO L124 PetriNetUnfolderBase]: 1767/2967 cut-off events. [2024-06-20 15:15:47,867 INFO L125 PetriNetUnfolderBase]: For 69766/69766 co-relation queries the response was YES. [2024-06-20 15:15:47,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17261 conditions, 2967 events. 1767/2967 cut-off events. For 69766/69766 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 17546 event pairs, 455 based on Foata normal form. 12/2975 useless extension candidates. Maximal degree in co-relation 17193. Up to 2230 conditions per place. [2024-06-20 15:15:47,887 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 130 selfloop transitions, 40 changer transitions 0/177 dead transitions. [2024-06-20 15:15:47,887 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 177 transitions, 2178 flow [2024-06-20 15:15:47,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:15:47,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:15:47,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-06-20 15:15:47,890 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6214285714285714 [2024-06-20 15:15:47,890 INFO L175 Difference]: Start difference. First operand has 140 places, 143 transitions, 1725 flow. Second operand 7 states and 174 transitions. [2024-06-20 15:15:47,890 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 177 transitions, 2178 flow [2024-06-20 15:15:47,966 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 177 transitions, 2097 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-20 15:15:47,968 INFO L231 Difference]: Finished difference. Result has 142 places, 144 transitions, 1754 flow [2024-06-20 15:15:47,968 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1644, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1754, PETRI_PLACES=142, PETRI_TRANSITIONS=144} [2024-06-20 15:15:47,969 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 101 predicate places. [2024-06-20 15:15:47,969 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 144 transitions, 1754 flow [2024-06-20 15:15:47,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:47,969 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:47,969 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:15:47,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-20 15:15:47,969 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:15:47,970 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:47,970 INFO L85 PathProgramCache]: Analyzing trace with hash -643618595, now seen corresponding path program 6 times [2024-06-20 15:15:47,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:47,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603990412] [2024-06-20 15:15:47,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:47,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:47,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:48,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:48,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:48,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603990412] [2024-06-20 15:15:48,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603990412] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:48,067 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:48,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:15:48,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904247027] [2024-06-20 15:15:48,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:48,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:15:48,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:48,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:15:48,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:15:48,100 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:15:48,100 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 144 transitions, 1754 flow. Second operand has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:48,100 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:48,100 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:15:48,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:48,421 INFO L124 PetriNetUnfolderBase]: 1739/2926 cut-off events. [2024-06-20 15:15:48,421 INFO L125 PetriNetUnfolderBase]: For 70283/70286 co-relation queries the response was YES. [2024-06-20 15:15:48,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16776 conditions, 2926 events. 1739/2926 cut-off events. For 70283/70286 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 17299 event pairs, 484 based on Foata normal form. 18/2936 useless extension candidates. Maximal degree in co-relation 16707. Up to 2485 conditions per place. [2024-06-20 15:15:48,442 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 131 selfloop transitions, 34 changer transitions 0/172 dead transitions. [2024-06-20 15:15:48,442 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 172 transitions, 2182 flow [2024-06-20 15:15:48,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:15:48,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:15:48,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-20 15:15:48,443 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-20 15:15:48,443 INFO L175 Difference]: Start difference. First operand has 142 places, 144 transitions, 1754 flow. Second operand 7 states and 168 transitions. [2024-06-20 15:15:48,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 172 transitions, 2182 flow [2024-06-20 15:15:48,558 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 172 transitions, 2071 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-20 15:15:48,560 INFO L231 Difference]: Finished difference. Result has 144 places, 145 transitions, 1744 flow [2024-06-20 15:15:48,561 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1653, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1744, PETRI_PLACES=144, PETRI_TRANSITIONS=145} [2024-06-20 15:15:48,561 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 103 predicate places. [2024-06-20 15:15:48,561 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 145 transitions, 1744 flow [2024-06-20 15:15:48,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:48,561 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:48,562 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:15:48,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-20 15:15:48,562 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:15:48,562 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:48,562 INFO L85 PathProgramCache]: Analyzing trace with hash -643403393, now seen corresponding path program 2 times [2024-06-20 15:15:48,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:48,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413533241] [2024-06-20 15:15:48,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:48,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:48,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:48,635 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:48,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:48,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413533241] [2024-06-20 15:15:48,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413533241] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:48,636 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:48,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:15:48,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304278416] [2024-06-20 15:15:48,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:48,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:15:48,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:48,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:15:48,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:15:48,663 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:15:48,663 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 145 transitions, 1744 flow. Second operand has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:48,663 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:48,663 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:15:48,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:48,972 INFO L124 PetriNetUnfolderBase]: 1719/2894 cut-off events. [2024-06-20 15:15:48,972 INFO L125 PetriNetUnfolderBase]: For 66163/66166 co-relation queries the response was YES. [2024-06-20 15:15:48,985 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16191 conditions, 2894 events. 1719/2894 cut-off events. For 66163/66166 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 17045 event pairs, 455 based on Foata normal form. 14/2900 useless extension candidates. Maximal degree in co-relation 16121. Up to 2366 conditions per place. [2024-06-20 15:15:48,993 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 132 selfloop transitions, 36 changer transitions 0/175 dead transitions. [2024-06-20 15:15:48,993 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 175 transitions, 2164 flow [2024-06-20 15:15:48,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:15:48,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:15:48,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-20 15:15:48,995 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6107142857142858 [2024-06-20 15:15:48,995 INFO L175 Difference]: Start difference. First operand has 144 places, 145 transitions, 1744 flow. Second operand 7 states and 171 transitions. [2024-06-20 15:15:48,995 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 175 transitions, 2164 flow [2024-06-20 15:15:49,092 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 175 transitions, 2091 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-20 15:15:49,094 INFO L231 Difference]: Finished difference. Result has 146 places, 145 transitions, 1749 flow [2024-06-20 15:15:49,094 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1671, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1749, PETRI_PLACES=146, PETRI_TRANSITIONS=145} [2024-06-20 15:15:49,094 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 105 predicate places. [2024-06-20 15:15:49,095 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 145 transitions, 1749 flow [2024-06-20 15:15:49,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:49,095 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:49,095 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:15:49,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-20 15:15:49,095 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:15:49,096 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:49,096 INFO L85 PathProgramCache]: Analyzing trace with hash 1976433955, now seen corresponding path program 3 times [2024-06-20 15:15:49,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:49,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587444837] [2024-06-20 15:15:49,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:49,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:49,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:49,170 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:49,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:49,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587444837] [2024-06-20 15:15:49,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587444837] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:49,171 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:49,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:15:49,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735159303] [2024-06-20 15:15:49,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:49,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:15:49,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:49,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:15:49,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:15:49,212 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:15:49,212 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 145 transitions, 1749 flow. Second operand has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:49,213 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:49,213 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:15:49,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:49,532 INFO L124 PetriNetUnfolderBase]: 1699/2862 cut-off events. [2024-06-20 15:15:49,533 INFO L125 PetriNetUnfolderBase]: For 64399/64402 co-relation queries the response was YES. [2024-06-20 15:15:49,545 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15828 conditions, 2862 events. 1699/2862 cut-off events. For 64399/64402 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 16761 event pairs, 400 based on Foata normal form. 14/2868 useless extension candidates. Maximal degree in co-relation 15757. Up to 1833 conditions per place. [2024-06-20 15:15:49,553 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 124 selfloop transitions, 44 changer transitions 0/175 dead transitions. [2024-06-20 15:15:49,554 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 175 transitions, 2111 flow [2024-06-20 15:15:49,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:15:49,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:15:49,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-20 15:15:49,555 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6071428571428571 [2024-06-20 15:15:49,555 INFO L175 Difference]: Start difference. First operand has 146 places, 145 transitions, 1749 flow. Second operand 7 states and 170 transitions. [2024-06-20 15:15:49,555 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 175 transitions, 2111 flow [2024-06-20 15:15:49,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 175 transitions, 1950 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-20 15:15:49,645 INFO L231 Difference]: Finished difference. Result has 144 places, 144 transitions, 1620 flow [2024-06-20 15:15:49,645 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1528, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1620, PETRI_PLACES=144, PETRI_TRANSITIONS=144} [2024-06-20 15:15:49,645 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 103 predicate places. [2024-06-20 15:15:49,645 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 144 transitions, 1620 flow [2024-06-20 15:15:49,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:49,646 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:49,646 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:15:49,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-20 15:15:49,646 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:15:49,646 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:49,646 INFO L85 PathProgramCache]: Analyzing trace with hash -1179730858, now seen corresponding path program 1 times [2024-06-20 15:15:49,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:49,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153884048] [2024-06-20 15:15:49,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:49,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:49,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:49,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:49,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:49,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153884048] [2024-06-20 15:15:49,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153884048] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:49,731 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:49,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:15:49,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363120911] [2024-06-20 15:15:49,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:49,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:15:49,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:49,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:15:49,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:15:49,768 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:15:49,768 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 144 transitions, 1620 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:49,768 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:49,768 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:15:49,768 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:50,033 INFO L124 PetriNetUnfolderBase]: 1704/2882 cut-off events. [2024-06-20 15:15:50,033 INFO L125 PetriNetUnfolderBase]: For 61433/61433 co-relation queries the response was YES. [2024-06-20 15:15:50,046 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15674 conditions, 2882 events. 1704/2882 cut-off events. For 61433/61433 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 17043 event pairs, 422 based on Foata normal form. 1/2882 useless extension candidates. Maximal degree in co-relation 15604. Up to 2644 conditions per place. [2024-06-20 15:15:50,055 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 140 selfloop transitions, 20 changer transitions 0/167 dead transitions. [2024-06-20 15:15:50,055 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 167 transitions, 2108 flow [2024-06-20 15:15:50,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:15:50,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:15:50,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 139 transitions. [2024-06-20 15:15:50,056 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5791666666666667 [2024-06-20 15:15:50,056 INFO L175 Difference]: Start difference. First operand has 144 places, 144 transitions, 1620 flow. Second operand 6 states and 139 transitions. [2024-06-20 15:15:50,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 167 transitions, 2108 flow [2024-06-20 15:15:50,133 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 167 transitions, 1994 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-20 15:15:50,135 INFO L231 Difference]: Finished difference. Result has 145 places, 150 transitions, 1622 flow [2024-06-20 15:15:50,135 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1506, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1622, PETRI_PLACES=145, PETRI_TRANSITIONS=150} [2024-06-20 15:15:50,135 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 104 predicate places. [2024-06-20 15:15:50,136 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 150 transitions, 1622 flow [2024-06-20 15:15:50,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:50,136 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:50,136 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:15:50,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-20 15:15:50,136 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:15:50,136 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:50,136 INFO L85 PathProgramCache]: Analyzing trace with hash 348397974, now seen corresponding path program 2 times [2024-06-20 15:15:50,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:50,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735883120] [2024-06-20 15:15:50,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:50,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:50,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:50,212 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:50,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:50,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735883120] [2024-06-20 15:15:50,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735883120] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:50,213 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:50,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:15:50,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024151186] [2024-06-20 15:15:50,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:50,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:15:50,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:50,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:15:50,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:15:50,239 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:15:50,239 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 150 transitions, 1622 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:50,239 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:50,240 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:15:50,240 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:50,543 INFO L124 PetriNetUnfolderBase]: 1714/2898 cut-off events. [2024-06-20 15:15:50,543 INFO L125 PetriNetUnfolderBase]: For 64714/64714 co-relation queries the response was YES. [2024-06-20 15:15:50,554 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15628 conditions, 2898 events. 1714/2898 cut-off events. For 64714/64714 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 17192 event pairs, 422 based on Foata normal form. 1/2898 useless extension candidates. Maximal degree in co-relation 15557. Up to 2670 conditions per place. [2024-06-20 15:15:50,561 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 144 selfloop transitions, 18 changer transitions 0/169 dead transitions. [2024-06-20 15:15:50,562 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 169 transitions, 2051 flow [2024-06-20 15:15:50,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:15:50,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:15:50,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 134 transitions. [2024-06-20 15:15:50,562 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5583333333333333 [2024-06-20 15:15:50,562 INFO L175 Difference]: Start difference. First operand has 145 places, 150 transitions, 1622 flow. Second operand 6 states and 134 transitions. [2024-06-20 15:15:50,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 169 transitions, 2051 flow [2024-06-20 15:15:50,640 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 169 transitions, 1997 flow, removed 19 selfloop flow, removed 2 redundant places. [2024-06-20 15:15:50,642 INFO L231 Difference]: Finished difference. Result has 149 places, 156 transitions, 1689 flow [2024-06-20 15:15:50,642 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1577, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1689, PETRI_PLACES=149, PETRI_TRANSITIONS=156} [2024-06-20 15:15:50,643 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 108 predicate places. [2024-06-20 15:15:50,643 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 156 transitions, 1689 flow [2024-06-20 15:15:50,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:50,643 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:50,643 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:15:50,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-20 15:15:50,643 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:15:50,643 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:50,643 INFO L85 PathProgramCache]: Analyzing trace with hash 177695730, now seen corresponding path program 1 times [2024-06-20 15:15:50,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:50,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812186567] [2024-06-20 15:15:50,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:50,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:50,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:50,712 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:50,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:50,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812186567] [2024-06-20 15:15:50,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812186567] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:50,712 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:50,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:15:50,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566836887] [2024-06-20 15:15:50,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:50,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:15:50,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:50,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:15:50,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:15:50,734 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:15:50,734 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 156 transitions, 1689 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:50,734 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:50,734 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:15:50,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:51,005 INFO L124 PetriNetUnfolderBase]: 1749/2944 cut-off events. [2024-06-20 15:15:51,005 INFO L125 PetriNetUnfolderBase]: For 69943/69943 co-relation queries the response was YES. [2024-06-20 15:15:51,017 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16042 conditions, 2944 events. 1749/2944 cut-off events. For 69943/69943 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 17389 event pairs, 445 based on Foata normal form. 3/2942 useless extension candidates. Maximal degree in co-relation 15969. Up to 2530 conditions per place. [2024-06-20 15:15:51,027 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 122 selfloop transitions, 55 changer transitions 0/184 dead transitions. [2024-06-20 15:15:51,027 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 184 transitions, 2340 flow [2024-06-20 15:15:51,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:15:51,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:15:51,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-20 15:15:51,028 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6166666666666667 [2024-06-20 15:15:51,028 INFO L175 Difference]: Start difference. First operand has 149 places, 156 transitions, 1689 flow. Second operand 6 states and 148 transitions. [2024-06-20 15:15:51,028 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 184 transitions, 2340 flow [2024-06-20 15:15:51,130 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 184 transitions, 2286 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-20 15:15:51,132 INFO L231 Difference]: Finished difference. Result has 153 places, 169 transitions, 1904 flow [2024-06-20 15:15:51,132 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1635, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1904, PETRI_PLACES=153, PETRI_TRANSITIONS=169} [2024-06-20 15:15:51,132 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 112 predicate places. [2024-06-20 15:15:51,133 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 169 transitions, 1904 flow [2024-06-20 15:15:51,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:51,133 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:51,133 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:15:51,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-20 15:15:51,133 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:15:51,133 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:51,133 INFO L85 PathProgramCache]: Analyzing trace with hash 1348304558, now seen corresponding path program 2 times [2024-06-20 15:15:51,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:51,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897235526] [2024-06-20 15:15:51,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:51,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:51,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:51,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:51,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:51,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897235526] [2024-06-20 15:15:51,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897235526] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:51,198 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:51,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:15:51,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407886812] [2024-06-20 15:15:51,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:51,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:15:51,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:51,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:15:51,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:15:51,216 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:15:51,216 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 169 transitions, 1904 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:51,217 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:51,217 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:15:51,217 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:51,506 INFO L124 PetriNetUnfolderBase]: 1766/2980 cut-off events. [2024-06-20 15:15:51,506 INFO L125 PetriNetUnfolderBase]: For 75196/75199 co-relation queries the response was YES. [2024-06-20 15:15:51,519 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16545 conditions, 2980 events. 1766/2980 cut-off events. For 75196/75199 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 17678 event pairs, 468 based on Foata normal form. 5/2977 useless extension candidates. Maximal degree in co-relation 16470. Up to 2547 conditions per place. [2024-06-20 15:15:51,528 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 126 selfloop transitions, 51 changer transitions 0/184 dead transitions. [2024-06-20 15:15:51,528 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 184 transitions, 2407 flow [2024-06-20 15:15:51,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 15:15:51,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 15:15:51,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 122 transitions. [2024-06-20 15:15:51,529 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.61 [2024-06-20 15:15:51,529 INFO L175 Difference]: Start difference. First operand has 153 places, 169 transitions, 1904 flow. Second operand 5 states and 122 transitions. [2024-06-20 15:15:51,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 184 transitions, 2407 flow [2024-06-20 15:15:51,634 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 184 transitions, 2326 flow, removed 9 selfloop flow, removed 2 redundant places. [2024-06-20 15:15:51,636 INFO L231 Difference]: Finished difference. Result has 156 places, 174 transitions, 1993 flow [2024-06-20 15:15:51,636 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1827, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1993, PETRI_PLACES=156, PETRI_TRANSITIONS=174} [2024-06-20 15:15:51,636 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 115 predicate places. [2024-06-20 15:15:51,636 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 174 transitions, 1993 flow [2024-06-20 15:15:51,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:51,637 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:51,637 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:15:51,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-20 15:15:51,637 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:15:51,637 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:51,637 INFO L85 PathProgramCache]: Analyzing trace with hash 1084313344, now seen corresponding path program 3 times [2024-06-20 15:15:51,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:51,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836311093] [2024-06-20 15:15:51,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:51,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:51,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:51,712 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:51,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:51,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836311093] [2024-06-20 15:15:51,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836311093] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:51,712 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:51,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:15:51,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614718403] [2024-06-20 15:15:51,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:51,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:15:51,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:51,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:15:51,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:15:51,741 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:15:51,741 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 174 transitions, 1993 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:51,742 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:51,742 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:15:51,742 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:52,024 INFO L124 PetriNetUnfolderBase]: 1743/2935 cut-off events. [2024-06-20 15:15:52,024 INFO L125 PetriNetUnfolderBase]: For 75880/75880 co-relation queries the response was YES. [2024-06-20 15:15:52,038 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16339 conditions, 2935 events. 1743/2935 cut-off events. For 75880/75880 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 17310 event pairs, 443 based on Foata normal form. 3/2933 useless extension candidates. Maximal degree in co-relation 16263. Up to 2517 conditions per place. [2024-06-20 15:15:52,048 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 120 selfloop transitions, 60 changer transitions 0/187 dead transitions. [2024-06-20 15:15:52,048 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 187 transitions, 2455 flow [2024-06-20 15:15:52,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 15:15:52,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 15:15:52,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 126 transitions. [2024-06-20 15:15:52,049 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.63 [2024-06-20 15:15:52,049 INFO L175 Difference]: Start difference. First operand has 156 places, 174 transitions, 1993 flow. Second operand 5 states and 126 transitions. [2024-06-20 15:15:52,049 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 187 transitions, 2455 flow [2024-06-20 15:15:52,218 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 187 transitions, 2341 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-20 15:15:52,220 INFO L231 Difference]: Finished difference. Result has 158 places, 174 transitions, 2017 flow [2024-06-20 15:15:52,220 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1879, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2017, PETRI_PLACES=158, PETRI_TRANSITIONS=174} [2024-06-20 15:15:52,221 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 117 predicate places. [2024-06-20 15:15:52,221 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 174 transitions, 2017 flow [2024-06-20 15:15:52,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:52,221 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:52,221 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:15:52,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-20 15:15:52,221 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:15:52,221 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:52,221 INFO L85 PathProgramCache]: Analyzing trace with hash 1084313158, now seen corresponding path program 3 times [2024-06-20 15:15:52,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:52,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806200005] [2024-06-20 15:15:52,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:52,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:52,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:52,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:52,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:52,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806200005] [2024-06-20 15:15:52,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806200005] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:52,303 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:52,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:15:52,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423724636] [2024-06-20 15:15:52,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:52,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:15:52,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:52,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:15:52,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:15:52,335 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:15:52,335 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 174 transitions, 2017 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:52,335 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:52,335 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:15:52,335 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:52,682 INFO L124 PetriNetUnfolderBase]: 1740/2936 cut-off events. [2024-06-20 15:15:52,683 INFO L125 PetriNetUnfolderBase]: For 76778/76778 co-relation queries the response was YES. [2024-06-20 15:15:52,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16461 conditions, 2936 events. 1740/2936 cut-off events. For 76778/76778 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 17370 event pairs, 416 based on Foata normal form. 1/2936 useless extension candidates. Maximal degree in co-relation 16385. Up to 2691 conditions per place. [2024-06-20 15:15:52,706 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 159 selfloop transitions, 23 changer transitions 0/189 dead transitions. [2024-06-20 15:15:52,706 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 189 transitions, 2419 flow [2024-06-20 15:15:52,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 15:15:52,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 15:15:52,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 120 transitions. [2024-06-20 15:15:52,706 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-20 15:15:52,706 INFO L175 Difference]: Start difference. First operand has 158 places, 174 transitions, 2017 flow. Second operand 5 states and 120 transitions. [2024-06-20 15:15:52,706 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 189 transitions, 2419 flow [2024-06-20 15:15:52,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 189 transitions, 2250 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-20 15:15:52,832 INFO L231 Difference]: Finished difference. Result has 159 places, 174 transitions, 1908 flow [2024-06-20 15:15:52,832 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1848, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1908, PETRI_PLACES=159, PETRI_TRANSITIONS=174} [2024-06-20 15:15:52,833 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 118 predicate places. [2024-06-20 15:15:52,833 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 174 transitions, 1908 flow [2024-06-20 15:15:52,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:52,833 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:52,833 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:15:52,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-20 15:15:52,833 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:15:52,833 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:52,833 INFO L85 PathProgramCache]: Analyzing trace with hash 1348313486, now seen corresponding path program 1 times [2024-06-20 15:15:52,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:52,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720967110] [2024-06-20 15:15:52,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:52,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:52,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:52,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:52,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:52,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720967110] [2024-06-20 15:15:52,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720967110] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:52,910 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:52,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:15:52,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783694309] [2024-06-20 15:15:52,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:52,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:15:52,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:52,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:15:52,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:15:52,951 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:15:52,952 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 174 transitions, 1908 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:52,952 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:52,952 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:15:52,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:53,229 INFO L124 PetriNetUnfolderBase]: 1743/2937 cut-off events. [2024-06-20 15:15:53,229 INFO L125 PetriNetUnfolderBase]: For 78044/78049 co-relation queries the response was YES. [2024-06-20 15:15:53,243 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16240 conditions, 2937 events. 1743/2937 cut-off events. For 78044/78049 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 17288 event pairs, 423 based on Foata normal form. 8/2943 useless extension candidates. Maximal degree in co-relation 16163. Up to 2685 conditions per place. [2024-06-20 15:15:53,252 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 163 selfloop transitions, 17 changer transitions 0/187 dead transitions. [2024-06-20 15:15:53,253 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 187 transitions, 2342 flow [2024-06-20 15:15:53,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 15:15:53,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 15:15:53,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 116 transitions. [2024-06-20 15:15:53,253 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.58 [2024-06-20 15:15:53,253 INFO L175 Difference]: Start difference. First operand has 159 places, 174 transitions, 1908 flow. Second operand 5 states and 116 transitions. [2024-06-20 15:15:53,253 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 187 transitions, 2342 flow [2024-06-20 15:15:53,415 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 187 transitions, 2294 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-06-20 15:15:53,418 INFO L231 Difference]: Finished difference. Result has 160 places, 177 transitions, 1956 flow [2024-06-20 15:15:53,418 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1860, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1956, PETRI_PLACES=160, PETRI_TRANSITIONS=177} [2024-06-20 15:15:53,418 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 119 predicate places. [2024-06-20 15:15:53,418 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 177 transitions, 1956 flow [2024-06-20 15:15:53,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:53,418 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:53,418 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:15:53,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-20 15:15:53,418 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:15:53,419 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:53,419 INFO L85 PathProgramCache]: Analyzing trace with hash 305494220, now seen corresponding path program 1 times [2024-06-20 15:15:53,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:53,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281397225] [2024-06-20 15:15:53,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:53,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:53,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:53,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:53,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:53,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281397225] [2024-06-20 15:15:53,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281397225] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:53,486 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:53,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:15:53,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179949278] [2024-06-20 15:15:53,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:53,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:15:53,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:53,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:15:53,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:15:53,509 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:15:53,509 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 177 transitions, 1956 flow. Second operand has 6 states, 6 states have (on average 16.333333333333332) internal successors, (98), 6 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:53,509 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:53,509 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:15:53,509 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:53,800 INFO L124 PetriNetUnfolderBase]: 1763/2965 cut-off events. [2024-06-20 15:15:53,800 INFO L125 PetriNetUnfolderBase]: For 77062/77070 co-relation queries the response was YES. [2024-06-20 15:15:53,814 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16551 conditions, 2965 events. 1763/2965 cut-off events. For 77062/77070 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 17525 event pairs, 464 based on Foata normal form. 8/2967 useless extension candidates. Maximal degree in co-relation 16473. Up to 2534 conditions per place. [2024-06-20 15:15:53,823 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 136 selfloop transitions, 59 changer transitions 0/202 dead transitions. [2024-06-20 15:15:53,823 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 202 transitions, 2547 flow [2024-06-20 15:15:53,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:15:53,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:15:53,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 146 transitions. [2024-06-20 15:15:53,824 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6083333333333333 [2024-06-20 15:15:53,824 INFO L175 Difference]: Start difference. First operand has 160 places, 177 transitions, 1956 flow. Second operand 6 states and 146 transitions. [2024-06-20 15:15:53,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 202 transitions, 2547 flow [2024-06-20 15:15:53,923 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 202 transitions, 2473 flow, removed 22 selfloop flow, removed 3 redundant places. [2024-06-20 15:15:53,925 INFO L231 Difference]: Finished difference. Result has 164 places, 185 transitions, 2101 flow [2024-06-20 15:15:53,925 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1882, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2101, PETRI_PLACES=164, PETRI_TRANSITIONS=185} [2024-06-20 15:15:53,925 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 123 predicate places. [2024-06-20 15:15:53,926 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 185 transitions, 2101 flow [2024-06-20 15:15:53,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.333333333333332) internal successors, (98), 6 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:53,926 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:53,926 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:15:53,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-20 15:15:53,926 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:15:53,926 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:53,926 INFO L85 PathProgramCache]: Analyzing trace with hash 1316619980, now seen corresponding path program 2 times [2024-06-20 15:15:53,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:53,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028474448] [2024-06-20 15:15:53,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:53,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:53,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:53,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:54,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:54,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028474448] [2024-06-20 15:15:54,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028474448] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:54,000 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:54,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:15:54,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644000003] [2024-06-20 15:15:54,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:54,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:15:54,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:54,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:15:54,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:15:54,029 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:15:54,029 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 185 transitions, 2101 flow. Second operand has 6 states, 6 states have (on average 16.333333333333332) internal successors, (98), 6 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:54,029 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:54,029 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:15:54,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:54,344 INFO L124 PetriNetUnfolderBase]: 1773/2983 cut-off events. [2024-06-20 15:15:54,344 INFO L125 PetriNetUnfolderBase]: For 81365/81373 co-relation queries the response was YES. [2024-06-20 15:15:54,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16861 conditions, 2983 events. 1773/2983 cut-off events. For 81365/81373 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 17709 event pairs, 464 based on Foata normal form. 8/2985 useless extension candidates. Maximal degree in co-relation 16781. Up to 2544 conditions per place. [2024-06-20 15:15:54,370 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 135 selfloop transitions, 63 changer transitions 0/205 dead transitions. [2024-06-20 15:15:54,370 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 205 transitions, 2664 flow [2024-06-20 15:15:54,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 15:15:54,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 15:15:54,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 127 transitions. [2024-06-20 15:15:54,371 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.635 [2024-06-20 15:15:54,371 INFO L175 Difference]: Start difference. First operand has 164 places, 185 transitions, 2101 flow. Second operand 5 states and 127 transitions. [2024-06-20 15:15:54,371 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 205 transitions, 2664 flow [2024-06-20 15:15:54,569 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 205 transitions, 2511 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-06-20 15:15:54,572 INFO L231 Difference]: Finished difference. Result has 166 places, 189 transitions, 2139 flow [2024-06-20 15:15:54,572 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1960, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2139, PETRI_PLACES=166, PETRI_TRANSITIONS=189} [2024-06-20 15:15:54,572 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 125 predicate places. [2024-06-20 15:15:54,572 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 189 transitions, 2139 flow [2024-06-20 15:15:54,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.333333333333332) internal successors, (98), 6 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:54,572 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:54,572 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:15:54,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-20 15:15:54,572 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:15:54,573 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:54,573 INFO L85 PathProgramCache]: Analyzing trace with hash 1316631140, now seen corresponding path program 3 times [2024-06-20 15:15:54,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:54,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357341162] [2024-06-20 15:15:54,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:54,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:54,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:54,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:54,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:54,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357341162] [2024-06-20 15:15:54,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357341162] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:54,660 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:54,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:15:54,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983515094] [2024-06-20 15:15:54,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:54,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:15:54,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:54,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:15:54,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:15:54,687 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:15:54,687 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 189 transitions, 2139 flow. Second operand has 6 states, 6 states have (on average 16.333333333333332) internal successors, (98), 6 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:54,687 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:54,688 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:15:54,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:54,968 INFO L124 PetriNetUnfolderBase]: 1765/2969 cut-off events. [2024-06-20 15:15:54,969 INFO L125 PetriNetUnfolderBase]: For 83537/83540 co-relation queries the response was YES. [2024-06-20 15:15:54,984 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16817 conditions, 2969 events. 1765/2969 cut-off events. For 83537/83540 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 17520 event pairs, 470 based on Foata normal form. 4/2965 useless extension candidates. Maximal degree in co-relation 16737. Up to 2536 conditions per place. [2024-06-20 15:15:54,993 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 129 selfloop transitions, 62 changer transitions 0/198 dead transitions. [2024-06-20 15:15:54,993 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 198 transitions, 2543 flow [2024-06-20 15:15:54,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 15:15:54,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 15:15:54,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 120 transitions. [2024-06-20 15:15:54,994 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-20 15:15:54,994 INFO L175 Difference]: Start difference. First operand has 166 places, 189 transitions, 2139 flow. Second operand 5 states and 120 transitions. [2024-06-20 15:15:54,994 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 198 transitions, 2543 flow [2024-06-20 15:15:55,130 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 198 transitions, 2432 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-20 15:15:55,133 INFO L231 Difference]: Finished difference. Result has 168 places, 189 transitions, 2162 flow [2024-06-20 15:15:55,133 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2028, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2162, PETRI_PLACES=168, PETRI_TRANSITIONS=189} [2024-06-20 15:15:55,133 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 127 predicate places. [2024-06-20 15:15:55,133 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 189 transitions, 2162 flow [2024-06-20 15:15:55,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.333333333333332) internal successors, (98), 6 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:55,134 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:55,134 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:15:55,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-20 15:15:55,134 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:15:55,134 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:55,134 INFO L85 PathProgramCache]: Analyzing trace with hash -1238645294, now seen corresponding path program 1 times [2024-06-20 15:15:55,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:55,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530446016] [2024-06-20 15:15:55,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:55,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:55,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:55,208 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:55,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:55,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530446016] [2024-06-20 15:15:55,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530446016] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:55,208 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:55,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:15:55,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555382070] [2024-06-20 15:15:55,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:55,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:15:55,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:55,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:15:55,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:15:55,230 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:15:55,230 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 189 transitions, 2162 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:55,230 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:55,230 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:15:55,230 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:55,542 INFO L124 PetriNetUnfolderBase]: 1824/3049 cut-off events. [2024-06-20 15:15:55,542 INFO L125 PetriNetUnfolderBase]: For 88144/88144 co-relation queries the response was YES. [2024-06-20 15:15:55,596 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17495 conditions, 3049 events. 1824/3049 cut-off events. For 88144/88144 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 18079 event pairs, 458 based on Foata normal form. 3/3045 useless extension candidates. Maximal degree in co-relation 17415. Up to 2398 conditions per place. [2024-06-20 15:15:55,604 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 126 selfloop transitions, 96 changer transitions 0/229 dead transitions. [2024-06-20 15:15:55,604 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 229 transitions, 3122 flow [2024-06-20 15:15:55,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:15:55,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:15:55,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-20 15:15:55,605 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-20 15:15:55,605 INFO L175 Difference]: Start difference. First operand has 168 places, 189 transitions, 2162 flow. Second operand 7 states and 175 transitions. [2024-06-20 15:15:55,605 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 229 transitions, 3122 flow [2024-06-20 15:15:55,750 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 229 transitions, 2944 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-20 15:15:55,753 INFO L231 Difference]: Finished difference. Result has 171 places, 206 transitions, 2399 flow [2024-06-20 15:15:55,753 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1984, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2399, PETRI_PLACES=171, PETRI_TRANSITIONS=206} [2024-06-20 15:15:55,753 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 130 predicate places. [2024-06-20 15:15:55,753 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 206 transitions, 2399 flow [2024-06-20 15:15:55,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:55,753 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:55,753 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:15:55,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-20 15:15:55,754 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:15:55,754 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:55,754 INFO L85 PathProgramCache]: Analyzing trace with hash 1213595534, now seen corresponding path program 2 times [2024-06-20 15:15:55,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:55,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520083393] [2024-06-20 15:15:55,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:55,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:55,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:55,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:55,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:55,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520083393] [2024-06-20 15:15:55,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520083393] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:55,838 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:55,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:15:55,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317283149] [2024-06-20 15:15:55,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:55,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:15:55,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:55,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:15:55,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:15:55,868 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:15:55,868 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 206 transitions, 2399 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:55,868 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:55,868 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:15:55,869 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:56,270 INFO L124 PetriNetUnfolderBase]: 1883/3155 cut-off events. [2024-06-20 15:15:56,270 INFO L125 PetriNetUnfolderBase]: For 97848/97848 co-relation queries the response was YES. [2024-06-20 15:15:56,286 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19002 conditions, 3155 events. 1883/3155 cut-off events. For 97848/97848 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 18821 event pairs, 448 based on Foata normal form. 3/3153 useless extension candidates. Maximal degree in co-relation 18920. Up to 2655 conditions per place. [2024-06-20 15:15:56,296 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 147 selfloop transitions, 78 changer transitions 0/232 dead transitions. [2024-06-20 15:15:56,296 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 232 transitions, 3123 flow [2024-06-20 15:15:56,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:15:56,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:15:56,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-20 15:15:56,297 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-20 15:15:56,297 INFO L175 Difference]: Start difference. First operand has 171 places, 206 transitions, 2399 flow. Second operand 7 states and 168 transitions. [2024-06-20 15:15:56,297 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 232 transitions, 3123 flow [2024-06-20 15:15:56,474 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 232 transitions, 2929 flow, removed 53 selfloop flow, removed 2 redundant places. [2024-06-20 15:15:56,477 INFO L231 Difference]: Finished difference. Result has 177 places, 216 transitions, 2538 flow [2024-06-20 15:15:56,477 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2225, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2538, PETRI_PLACES=177, PETRI_TRANSITIONS=216} [2024-06-20 15:15:56,477 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 136 predicate places. [2024-06-20 15:15:56,477 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 216 transitions, 2538 flow [2024-06-20 15:15:56,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:56,478 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:56,478 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:15:56,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-20 15:15:56,478 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:15:56,478 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:56,478 INFO L85 PathProgramCache]: Analyzing trace with hash 1213601114, now seen corresponding path program 3 times [2024-06-20 15:15:56,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:56,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254162852] [2024-06-20 15:15:56,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:56,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:56,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:56,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:56,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:56,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254162852] [2024-06-20 15:15:56,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254162852] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:56,564 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:56,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:15:56,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365735451] [2024-06-20 15:15:56,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:56,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:15:56,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:56,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:15:56,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:15:56,602 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:15:56,602 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 216 transitions, 2538 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:56,602 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:56,602 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:15:56,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:57,016 INFO L124 PetriNetUnfolderBase]: 1882/3154 cut-off events. [2024-06-20 15:15:57,017 INFO L125 PetriNetUnfolderBase]: For 100356/100356 co-relation queries the response was YES. [2024-06-20 15:15:57,034 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19050 conditions, 3154 events. 1882/3154 cut-off events. For 100356/100356 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 18836 event pairs, 448 based on Foata normal form. 3/3152 useless extension candidates. Maximal degree in co-relation 18965. Up to 2656 conditions per place. [2024-06-20 15:15:57,044 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 144 selfloop transitions, 87 changer transitions 0/238 dead transitions. [2024-06-20 15:15:57,044 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 238 transitions, 3194 flow [2024-06-20 15:15:57,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:15:57,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:15:57,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 208 transitions. [2024-06-20 15:15:57,045 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5777777777777777 [2024-06-20 15:15:57,045 INFO L175 Difference]: Start difference. First operand has 177 places, 216 transitions, 2538 flow. Second operand 9 states and 208 transitions. [2024-06-20 15:15:57,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 238 transitions, 3194 flow [2024-06-20 15:15:57,256 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 238 transitions, 3041 flow, removed 32 selfloop flow, removed 3 redundant places. [2024-06-20 15:15:57,258 INFO L231 Difference]: Finished difference. Result has 183 places, 221 transitions, 2643 flow [2024-06-20 15:15:57,259 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2393, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2643, PETRI_PLACES=183, PETRI_TRANSITIONS=221} [2024-06-20 15:15:57,259 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 142 predicate places. [2024-06-20 15:15:57,259 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 221 transitions, 2643 flow [2024-06-20 15:15:57,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:57,259 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:57,259 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:15:57,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-20 15:15:57,259 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:15:57,260 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:57,260 INFO L85 PathProgramCache]: Analyzing trace with hash -1152230882, now seen corresponding path program 4 times [2024-06-20 15:15:57,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:57,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301916751] [2024-06-20 15:15:57,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:57,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:57,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:57,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:57,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:57,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301916751] [2024-06-20 15:15:57,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301916751] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:57,354 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:57,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:15:57,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139921418] [2024-06-20 15:15:57,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:57,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:15:57,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:57,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:15:57,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:15:57,387 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:15:57,387 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 221 transitions, 2643 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:57,387 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:57,387 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:15:57,387 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:57,855 INFO L124 PetriNetUnfolderBase]: 1937/3256 cut-off events. [2024-06-20 15:15:57,856 INFO L125 PetriNetUnfolderBase]: For 110112/110115 co-relation queries the response was YES. [2024-06-20 15:15:57,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20024 conditions, 3256 events. 1937/3256 cut-off events. For 110112/110115 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 19653 event pairs, 469 based on Foata normal form. 5/3253 useless extension candidates. Maximal degree in co-relation 19937. Up to 2553 conditions per place. [2024-06-20 15:15:57,887 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 133 selfloop transitions, 115 changer transitions 0/255 dead transitions. [2024-06-20 15:15:57,887 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 255 transitions, 3561 flow [2024-06-20 15:15:57,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:15:57,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:15:57,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 188 transitions. [2024-06-20 15:15:57,892 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5875 [2024-06-20 15:15:57,892 INFO L175 Difference]: Start difference. First operand has 183 places, 221 transitions, 2643 flow. Second operand 8 states and 188 transitions. [2024-06-20 15:15:57,892 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 255 transitions, 3561 flow [2024-06-20 15:15:58,114 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 255 transitions, 3353 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-20 15:15:58,117 INFO L231 Difference]: Finished difference. Result has 185 places, 237 transitions, 2926 flow [2024-06-20 15:15:58,117 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2435, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2926, PETRI_PLACES=185, PETRI_TRANSITIONS=237} [2024-06-20 15:15:58,118 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 144 predicate places. [2024-06-20 15:15:58,118 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 237 transitions, 2926 flow [2024-06-20 15:15:58,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:58,118 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:58,118 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:15:58,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-20 15:15:58,118 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:15:58,118 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:58,119 INFO L85 PathProgramCache]: Analyzing trace with hash -1159582532, now seen corresponding path program 5 times [2024-06-20 15:15:58,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:58,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801843523] [2024-06-20 15:15:58,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:58,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:58,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:58,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:58,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:58,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801843523] [2024-06-20 15:15:58,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801843523] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:58,209 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:58,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:15:58,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115575869] [2024-06-20 15:15:58,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:58,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:15:58,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:58,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:15:58,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:15:58,243 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:15:58,243 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 237 transitions, 2926 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:58,243 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:58,243 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:15:58,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:58,645 INFO L124 PetriNetUnfolderBase]: 1952/3274 cut-off events. [2024-06-20 15:15:58,645 INFO L125 PetriNetUnfolderBase]: For 115166/115166 co-relation queries the response was YES. [2024-06-20 15:15:58,664 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20642 conditions, 3274 events. 1952/3274 cut-off events. For 115166/115166 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 19720 event pairs, 448 based on Foata normal form. 3/3272 useless extension candidates. Maximal degree in co-relation 20553. Up to 2567 conditions per place. [2024-06-20 15:15:58,674 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 126 selfloop transitions, 136 changer transitions 0/269 dead transitions. [2024-06-20 15:15:58,674 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 269 transitions, 3898 flow [2024-06-20 15:15:58,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:15:58,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:15:58,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 216 transitions. [2024-06-20 15:15:58,675 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-20 15:15:58,675 INFO L175 Difference]: Start difference. First operand has 185 places, 237 transitions, 2926 flow. Second operand 9 states and 216 transitions. [2024-06-20 15:15:58,675 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 269 transitions, 3898 flow [2024-06-20 15:15:58,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 269 transitions, 3676 flow, removed 51 selfloop flow, removed 4 redundant places. [2024-06-20 15:15:58,917 INFO L231 Difference]: Finished difference. Result has 191 places, 244 transitions, 3172 flow [2024-06-20 15:15:58,917 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2718, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3172, PETRI_PLACES=191, PETRI_TRANSITIONS=244} [2024-06-20 15:15:58,917 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 150 predicate places. [2024-06-20 15:15:58,917 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 244 transitions, 3172 flow [2024-06-20 15:15:58,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:58,918 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:58,918 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:15:58,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-20 15:15:58,918 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:15:58,918 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:58,918 INFO L85 PathProgramCache]: Analyzing trace with hash -746029504, now seen corresponding path program 6 times [2024-06-20 15:15:58,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:58,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88813229] [2024-06-20 15:15:58,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:58,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:58,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:58,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:58,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:58,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88813229] [2024-06-20 15:15:58,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88813229] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:58,995 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:58,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:15:58,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995321647] [2024-06-20 15:15:58,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:58,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:15:58,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:58,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:15:58,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:15:59,035 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:15:59,035 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 244 transitions, 3172 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:59,035 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:59,035 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:15:59,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:59,415 INFO L124 PetriNetUnfolderBase]: 1947/3270 cut-off events. [2024-06-20 15:15:59,416 INFO L125 PetriNetUnfolderBase]: For 117366/117366 co-relation queries the response was YES. [2024-06-20 15:15:59,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20972 conditions, 3270 events. 1947/3270 cut-off events. For 117366/117366 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 19710 event pairs, 448 based on Foata normal form. 3/3268 useless extension candidates. Maximal degree in co-relation 20881. Up to 2565 conditions per place. [2024-06-20 15:15:59,444 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 133 selfloop transitions, 126 changer transitions 0/266 dead transitions. [2024-06-20 15:15:59,444 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 266 transitions, 3916 flow [2024-06-20 15:15:59,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:15:59,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:15:59,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-20 15:15:59,445 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-20 15:15:59,445 INFO L175 Difference]: Start difference. First operand has 191 places, 244 transitions, 3172 flow. Second operand 7 states and 175 transitions. [2024-06-20 15:15:59,445 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 266 transitions, 3916 flow [2024-06-20 15:15:59,705 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 266 transitions, 3615 flow, removed 38 selfloop flow, removed 5 redundant places. [2024-06-20 15:15:59,708 INFO L231 Difference]: Finished difference. Result has 193 places, 244 transitions, 3139 flow [2024-06-20 15:15:59,708 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2871, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3139, PETRI_PLACES=193, PETRI_TRANSITIONS=244} [2024-06-20 15:15:59,708 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 152 predicate places. [2024-06-20 15:15:59,709 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 244 transitions, 3139 flow [2024-06-20 15:15:59,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:59,709 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:59,709 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:15:59,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-20 15:15:59,709 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:15:59,709 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:59,709 INFO L85 PathProgramCache]: Analyzing trace with hash 990135285, now seen corresponding path program 1 times [2024-06-20 15:15:59,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:59,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689402832] [2024-06-20 15:15:59,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:59,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:59,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:59,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:59,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:59,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689402832] [2024-06-20 15:15:59,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689402832] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:59,779 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:59,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:15:59,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653005884] [2024-06-20 15:15:59,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:59,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:15:59,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:59,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:15:59,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:15:59,806 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:15:59,806 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 244 transitions, 3139 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:59,806 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:59,806 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:15:59,806 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:16:00,175 INFO L124 PetriNetUnfolderBase]: 1979/3310 cut-off events. [2024-06-20 15:16:00,175 INFO L125 PetriNetUnfolderBase]: For 124555/124555 co-relation queries the response was YES. [2024-06-20 15:16:00,195 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21664 conditions, 3310 events. 1979/3310 cut-off events. For 124555/124555 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 19924 event pairs, 463 based on Foata normal form. 2/3292 useless extension candidates. Maximal degree in co-relation 21572. Up to 2529 conditions per place. [2024-06-20 15:16:00,207 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 145 selfloop transitions, 132 changer transitions 0/284 dead transitions. [2024-06-20 15:16:00,207 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 284 transitions, 4281 flow [2024-06-20 15:16:00,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:16:00,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:16:00,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-06-20 15:16:00,208 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6428571428571429 [2024-06-20 15:16:00,208 INFO L175 Difference]: Start difference. First operand has 193 places, 244 transitions, 3139 flow. Second operand 7 states and 180 transitions. [2024-06-20 15:16:00,208 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 284 transitions, 4281 flow [2024-06-20 15:16:00,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 284 transitions, 4013 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-20 15:16:00,421 INFO L231 Difference]: Finished difference. Result has 196 places, 258 transitions, 3494 flow [2024-06-20 15:16:00,421 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2885, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3494, PETRI_PLACES=196, PETRI_TRANSITIONS=258} [2024-06-20 15:16:00,422 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 155 predicate places. [2024-06-20 15:16:00,422 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 258 transitions, 3494 flow [2024-06-20 15:16:00,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:00,422 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:16:00,422 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:16:00,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-20 15:16:00,422 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:16:00,423 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:16:00,423 INFO L85 PathProgramCache]: Analyzing trace with hash 187543929, now seen corresponding path program 2 times [2024-06-20 15:16:00,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:16:00,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22245926] [2024-06-20 15:16:00,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:16:00,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:16:00,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:16:00,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:16:00,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:16:00,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22245926] [2024-06-20 15:16:00,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22245926] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:16:00,498 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:16:00,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:16:00,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263677216] [2024-06-20 15:16:00,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:16:00,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:16:00,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:16:00,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:16:00,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:16:00,527 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:16:00,527 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 258 transitions, 3494 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:00,527 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:16:00,528 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:16:00,528 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:16:00,929 INFO L124 PetriNetUnfolderBase]: 1971/3305 cut-off events. [2024-06-20 15:16:00,929 INFO L125 PetriNetUnfolderBase]: For 128058/128061 co-relation queries the response was YES. [2024-06-20 15:16:00,949 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21901 conditions, 3305 events. 1971/3305 cut-off events. For 128058/128061 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 19907 event pairs, 437 based on Foata normal form. 4/3298 useless extension candidates. Maximal degree in co-relation 21806. Up to 2817 conditions per place. [2024-06-20 15:16:00,960 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 199 selfloop transitions, 72 changer transitions 0/278 dead transitions. [2024-06-20 15:16:00,960 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 278 transitions, 4086 flow [2024-06-20 15:16:00,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:16:00,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:16:00,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-20 15:16:00,961 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6071428571428571 [2024-06-20 15:16:00,961 INFO L175 Difference]: Start difference. First operand has 196 places, 258 transitions, 3494 flow. Second operand 7 states and 170 transitions. [2024-06-20 15:16:00,961 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 278 transitions, 4086 flow [2024-06-20 15:16:01,288 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 278 transitions, 3927 flow, removed 30 selfloop flow, removed 2 redundant places. [2024-06-20 15:16:01,292 INFO L231 Difference]: Finished difference. Result has 201 places, 258 transitions, 3486 flow [2024-06-20 15:16:01,292 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3335, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3486, PETRI_PLACES=201, PETRI_TRANSITIONS=258} [2024-06-20 15:16:01,292 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 160 predicate places. [2024-06-20 15:16:01,292 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 258 transitions, 3486 flow [2024-06-20 15:16:01,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:01,292 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:16:01,292 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:16:01,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-20 15:16:01,293 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:16:01,293 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:16:01,293 INFO L85 PathProgramCache]: Analyzing trace with hash 1028463541, now seen corresponding path program 3 times [2024-06-20 15:16:01,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:16:01,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076972183] [2024-06-20 15:16:01,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:16:01,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:16:01,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:16:01,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:16:01,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:16:01,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076972183] [2024-06-20 15:16:01,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076972183] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:16:01,381 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:16:01,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:16:01,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088753651] [2024-06-20 15:16:01,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:16:01,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:16:01,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:16:01,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:16:01,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:16:01,425 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:16:01,425 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 258 transitions, 3486 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:01,425 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:16:01,425 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:16:01,425 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:16:01,846 INFO L124 PetriNetUnfolderBase]: 2027/3393 cut-off events. [2024-06-20 15:16:01,846 INFO L125 PetriNetUnfolderBase]: For 136221/136224 co-relation queries the response was YES. [2024-06-20 15:16:01,866 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22630 conditions, 3393 events. 2027/3393 cut-off events. For 136221/136224 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 20509 event pairs, 438 based on Foata normal form. 4/3386 useless extension candidates. Maximal degree in co-relation 22533. Up to 2844 conditions per place. [2024-06-20 15:16:01,877 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 206 selfloop transitions, 88 changer transitions 0/301 dead transitions. [2024-06-20 15:16:01,877 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 301 transitions, 4631 flow [2024-06-20 15:16:01,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:16:01,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:16:01,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 186 transitions. [2024-06-20 15:16:01,878 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.58125 [2024-06-20 15:16:01,878 INFO L175 Difference]: Start difference. First operand has 201 places, 258 transitions, 3486 flow. Second operand 8 states and 186 transitions. [2024-06-20 15:16:01,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 301 transitions, 4631 flow [2024-06-20 15:16:02,257 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 301 transitions, 4438 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-20 15:16:02,260 INFO L231 Difference]: Finished difference. Result has 208 places, 279 transitions, 3909 flow [2024-06-20 15:16:02,261 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3319, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3909, PETRI_PLACES=208, PETRI_TRANSITIONS=279} [2024-06-20 15:16:02,261 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 167 predicate places. [2024-06-20 15:16:02,261 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 279 transitions, 3909 flow [2024-06-20 15:16:02,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:02,261 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:16:02,261 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:16:02,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-20 15:16:02,261 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:16:02,261 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:16:02,262 INFO L85 PathProgramCache]: Analyzing trace with hash 1876997359, now seen corresponding path program 4 times [2024-06-20 15:16:02,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:16:02,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355267956] [2024-06-20 15:16:02,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:16:02,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:16:02,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:16:02,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:16:02,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:16:02,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355267956] [2024-06-20 15:16:02,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355267956] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:16:02,350 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:16:02,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:16:02,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717964172] [2024-06-20 15:16:02,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:16:02,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:16:02,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:16:02,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:16:02,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:16:02,379 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:16:02,380 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 279 transitions, 3909 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:02,380 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:16:02,380 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:16:02,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:16:02,793 INFO L124 PetriNetUnfolderBase]: 2064/3444 cut-off events. [2024-06-20 15:16:02,793 INFO L125 PetriNetUnfolderBase]: For 148134/148134 co-relation queries the response was YES. [2024-06-20 15:16:02,814 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23596 conditions, 3444 events. 2064/3444 cut-off events. For 148134/148134 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 20840 event pairs, 468 based on Foata normal form. 1/3438 useless extension candidates. Maximal degree in co-relation 23495. Up to 2564 conditions per place. [2024-06-20 15:16:02,825 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 140 selfloop transitions, 167 changer transitions 0/314 dead transitions. [2024-06-20 15:16:02,826 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 314 transitions, 5175 flow [2024-06-20 15:16:02,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:16:02,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:16:02,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-20 15:16:02,826 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6285714285714286 [2024-06-20 15:16:02,826 INFO L175 Difference]: Start difference. First operand has 208 places, 279 transitions, 3909 flow. Second operand 7 states and 176 transitions. [2024-06-20 15:16:02,826 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 314 transitions, 5175 flow [2024-06-20 15:16:03,135 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 314 transitions, 5014 flow, removed 32 selfloop flow, removed 2 redundant places. [2024-06-20 15:16:03,139 INFO L231 Difference]: Finished difference. Result has 213 places, 290 transitions, 4306 flow [2024-06-20 15:16:03,139 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3748, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=156, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4306, PETRI_PLACES=213, PETRI_TRANSITIONS=290} [2024-06-20 15:16:03,139 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 172 predicate places. [2024-06-20 15:16:03,140 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 290 transitions, 4306 flow [2024-06-20 15:16:03,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:03,140 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:16:03,140 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:16:03,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-20 15:16:03,140 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:16:03,140 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:16:03,140 INFO L85 PathProgramCache]: Analyzing trace with hash -1159976011, now seen corresponding path program 5 times [2024-06-20 15:16:03,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:16:03,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424622448] [2024-06-20 15:16:03,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:16:03,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:16:03,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:16:03,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:16:03,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:16:03,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424622448] [2024-06-20 15:16:03,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424622448] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:16:03,214 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:16:03,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:16:03,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154555891] [2024-06-20 15:16:03,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:16:03,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:16:03,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:16:03,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:16:03,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:16:03,246 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:16:03,246 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 290 transitions, 4306 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:03,246 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:16:03,246 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:16:03,246 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:16:03,671 INFO L124 PetriNetUnfolderBase]: 2069/3451 cut-off events. [2024-06-20 15:16:03,671 INFO L125 PetriNetUnfolderBase]: For 155480/155480 co-relation queries the response was YES. [2024-06-20 15:16:03,693 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24091 conditions, 3451 events. 2069/3451 cut-off events. For 155480/155480 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 20854 event pairs, 468 based on Foata normal form. 1/3445 useless extension candidates. Maximal degree in co-relation 23989. Up to 2566 conditions per place. [2024-06-20 15:16:03,705 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 142 selfloop transitions, 167 changer transitions 0/316 dead transitions. [2024-06-20 15:16:03,705 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 316 transitions, 5325 flow [2024-06-20 15:16:03,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:16:03,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:16:03,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-20 15:16:03,706 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-20 15:16:03,706 INFO L175 Difference]: Start difference. First operand has 213 places, 290 transitions, 4306 flow. Second operand 7 states and 175 transitions. [2024-06-20 15:16:03,706 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 316 transitions, 5325 flow [2024-06-20 15:16:04,072 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 316 transitions, 4988 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-20 15:16:04,076 INFO L231 Difference]: Finished difference. Result has 216 places, 293 transitions, 4366 flow [2024-06-20 15:16:04,077 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3972, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=290, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4366, PETRI_PLACES=216, PETRI_TRANSITIONS=293} [2024-06-20 15:16:04,077 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 175 predicate places. [2024-06-20 15:16:04,077 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 293 transitions, 4366 flow [2024-06-20 15:16:04,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:04,077 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:16:04,077 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:16:04,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-20 15:16:04,078 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:16:04,078 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:16:04,078 INFO L85 PathProgramCache]: Analyzing trace with hash 663125193, now seen corresponding path program 6 times [2024-06-20 15:16:04,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:16:04,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297110671] [2024-06-20 15:16:04,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:16:04,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:16:04,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:16:04,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:16:04,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:16:04,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297110671] [2024-06-20 15:16:04,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297110671] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:16:04,154 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:16:04,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:16:04,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76340183] [2024-06-20 15:16:04,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:16:04,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:16:04,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:16:04,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:16:04,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:16:04,177 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:16:04,177 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 293 transitions, 4366 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:04,177 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:16:04,177 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:16:04,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:16:04,642 INFO L124 PetriNetUnfolderBase]: 2066/3453 cut-off events. [2024-06-20 15:16:04,642 INFO L125 PetriNetUnfolderBase]: For 157966/157966 co-relation queries the response was YES. [2024-06-20 15:16:04,665 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24048 conditions, 3453 events. 2066/3453 cut-off events. For 157966/157966 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 20876 event pairs, 451 based on Foata normal form. 1/3449 useless extension candidates. Maximal degree in co-relation 23946. Up to 2924 conditions per place. [2024-06-20 15:16:04,677 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 220 selfloop transitions, 85 changer transitions 0/312 dead transitions. [2024-06-20 15:16:04,677 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 312 transitions, 5061 flow [2024-06-20 15:16:04,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:16:04,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:16:04,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 164 transitions. [2024-06-20 15:16:04,683 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5857142857142857 [2024-06-20 15:16:04,684 INFO L175 Difference]: Start difference. First operand has 216 places, 293 transitions, 4366 flow. Second operand 7 states and 164 transitions. [2024-06-20 15:16:04,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 312 transitions, 5061 flow [2024-06-20 15:16:05,022 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 312 transitions, 4676 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-20 15:16:05,026 INFO L231 Difference]: Finished difference. Result has 218 places, 295 transitions, 4202 flow [2024-06-20 15:16:05,026 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3986, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=293, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4202, PETRI_PLACES=218, PETRI_TRANSITIONS=295} [2024-06-20 15:16:05,027 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 177 predicate places. [2024-06-20 15:16:05,027 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 295 transitions, 4202 flow [2024-06-20 15:16:05,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:05,027 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:16:05,027 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:16:05,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-20 15:16:05,027 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:16:05,027 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:16:05,028 INFO L85 PathProgramCache]: Analyzing trace with hash -1148548171, now seen corresponding path program 7 times [2024-06-20 15:16:05,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:16:05,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834833718] [2024-06-20 15:16:05,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:16:05,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:16:05,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:16:05,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:16:05,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:16:05,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834833718] [2024-06-20 15:16:05,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834833718] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:16:05,099 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:16:05,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:16:05,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311856652] [2024-06-20 15:16:05,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:16:05,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:16:05,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:16:05,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:16:05,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:16:05,134 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:16:05,134 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 295 transitions, 4202 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:05,134 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:16:05,134 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:16:05,134 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:16:05,573 INFO L124 PetriNetUnfolderBase]: 2058/3434 cut-off events. [2024-06-20 15:16:05,573 INFO L125 PetriNetUnfolderBase]: For 162063/162063 co-relation queries the response was YES. [2024-06-20 15:16:05,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23581 conditions, 3434 events. 2058/3434 cut-off events. For 162063/162063 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 20774 event pairs, 468 based on Foata normal form. 2/3429 useless extension candidates. Maximal degree in co-relation 23478. Up to 2560 conditions per place. [2024-06-20 15:16:05,604 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 146 selfloop transitions, 161 changer transitions 0/314 dead transitions. [2024-06-20 15:16:05,605 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 314 transitions, 5062 flow [2024-06-20 15:16:05,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:16:05,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:16:05,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-20 15:16:05,605 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6178571428571429 [2024-06-20 15:16:05,605 INFO L175 Difference]: Start difference. First operand has 218 places, 295 transitions, 4202 flow. Second operand 7 states and 173 transitions. [2024-06-20 15:16:05,605 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 314 transitions, 5062 flow [2024-06-20 15:16:06,007 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 314 transitions, 4842 flow, removed 28 selfloop flow, removed 4 redundant places. [2024-06-20 15:16:06,011 INFO L231 Difference]: Finished difference. Result has 221 places, 295 transitions, 4312 flow [2024-06-20 15:16:06,011 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3982, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4312, PETRI_PLACES=221, PETRI_TRANSITIONS=295} [2024-06-20 15:16:06,012 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 180 predicate places. [2024-06-20 15:16:06,012 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 295 transitions, 4312 flow [2024-06-20 15:16:06,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:06,012 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:16:06,013 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:16:06,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-20 15:16:06,013 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:16:06,013 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:16:06,013 INFO L85 PathProgramCache]: Analyzing trace with hash -1033494151, now seen corresponding path program 8 times [2024-06-20 15:16:06,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:16:06,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996251293] [2024-06-20 15:16:06,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:16:06,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:16:06,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:16:06,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:16:06,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:16:06,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996251293] [2024-06-20 15:16:06,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996251293] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:16:06,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:16:06,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:16:06,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208099361] [2024-06-20 15:16:06,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:16:06,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:16:06,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:16:06,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:16:06,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:16:06,122 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:16:06,122 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 295 transitions, 4312 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:06,122 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:16:06,122 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:16:06,122 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:16:06,568 INFO L124 PetriNetUnfolderBase]: 2052/3434 cut-off events. [2024-06-20 15:16:06,568 INFO L125 PetriNetUnfolderBase]: For 164669/164669 co-relation queries the response was YES. [2024-06-20 15:16:06,591 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23797 conditions, 3434 events. 2052/3434 cut-off events. For 164669/164669 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 20804 event pairs, 449 based on Foata normal form. 2/3431 useless extension candidates. Maximal degree in co-relation 23693. Up to 2855 conditions per place. [2024-06-20 15:16:06,603 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 202 selfloop transitions, 103 changer transitions 0/312 dead transitions. [2024-06-20 15:16:06,604 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 312 transitions, 5064 flow [2024-06-20 15:16:06,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:16:06,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:16:06,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 205 transitions. [2024-06-20 15:16:06,604 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5694444444444444 [2024-06-20 15:16:06,605 INFO L175 Difference]: Start difference. First operand has 221 places, 295 transitions, 4312 flow. Second operand 9 states and 205 transitions. [2024-06-20 15:16:06,605 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 312 transitions, 5064 flow [2024-06-20 15:16:06,944 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 312 transitions, 4725 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-20 15:16:06,948 INFO L231 Difference]: Finished difference. Result has 224 places, 295 transitions, 4186 flow [2024-06-20 15:16:06,948 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3973, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4186, PETRI_PLACES=224, PETRI_TRANSITIONS=295} [2024-06-20 15:16:06,949 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 183 predicate places. [2024-06-20 15:16:06,949 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 295 transitions, 4186 flow [2024-06-20 15:16:06,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:06,949 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:16:06,949 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:16:06,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-20 15:16:06,949 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:16:06,949 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:16:06,949 INFO L85 PathProgramCache]: Analyzing trace with hash -1033257001, now seen corresponding path program 9 times [2024-06-20 15:16:06,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:16:06,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371412082] [2024-06-20 15:16:06,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:16:06,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:16:06,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:16:07,039 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:16:07,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:16:07,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371412082] [2024-06-20 15:16:07,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371412082] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:16:07,039 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:16:07,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:16:07,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145850930] [2024-06-20 15:16:07,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:16:07,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:16:07,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:16:07,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:16:07,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:16:07,069 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:16:07,069 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 295 transitions, 4186 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:07,069 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:16:07,069 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:16:07,069 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:16:07,554 INFO L124 PetriNetUnfolderBase]: 2044/3421 cut-off events. [2024-06-20 15:16:07,554 INFO L125 PetriNetUnfolderBase]: For 167047/167047 co-relation queries the response was YES. [2024-06-20 15:16:07,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23424 conditions, 3421 events. 2044/3421 cut-off events. For 167047/167047 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 20721 event pairs, 449 based on Foata normal form. 2/3418 useless extension candidates. Maximal degree in co-relation 23319. Up to 2847 conditions per place. [2024-06-20 15:16:07,584 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 203 selfloop transitions, 99 changer transitions 0/309 dead transitions. [2024-06-20 15:16:07,584 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 309 transitions, 4824 flow [2024-06-20 15:16:07,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:16:07,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:16:07,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2024-06-20 15:16:07,585 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5928571428571429 [2024-06-20 15:16:07,585 INFO L175 Difference]: Start difference. First operand has 224 places, 295 transitions, 4186 flow. Second operand 7 states and 166 transitions. [2024-06-20 15:16:07,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 309 transitions, 4824 flow [2024-06-20 15:16:08,002 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 309 transitions, 4534 flow, removed 31 selfloop flow, removed 7 redundant places. [2024-06-20 15:16:08,006 INFO L231 Difference]: Finished difference. Result has 224 places, 295 transitions, 4103 flow [2024-06-20 15:16:08,007 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3896, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4103, PETRI_PLACES=224, PETRI_TRANSITIONS=295} [2024-06-20 15:16:08,007 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 183 predicate places. [2024-06-20 15:16:08,007 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 295 transitions, 4103 flow [2024-06-20 15:16:08,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:08,007 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:16:08,007 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:16:08,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-20 15:16:08,007 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:16:08,008 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:16:08,008 INFO L85 PathProgramCache]: Analyzing trace with hash -1587505995, now seen corresponding path program 10 times [2024-06-20 15:16:08,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:16:08,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078353516] [2024-06-20 15:16:08,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:16:08,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:16:08,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:16:08,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:16:08,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:16:08,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078353516] [2024-06-20 15:16:08,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078353516] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:16:08,082 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:16:08,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:16:08,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382871587] [2024-06-20 15:16:08,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:16:08,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:16:08,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:16:08,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:16:08,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:16:08,107 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:16:08,107 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 295 transitions, 4103 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:08,107 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:16:08,107 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:16:08,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:16:08,553 INFO L124 PetriNetUnfolderBase]: 2038/3413 cut-off events. [2024-06-20 15:16:08,553 INFO L125 PetriNetUnfolderBase]: For 169340/169340 co-relation queries the response was YES. [2024-06-20 15:16:08,578 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23238 conditions, 3413 events. 2038/3413 cut-off events. For 169340/169340 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 20688 event pairs, 449 based on Foata normal form. 2/3410 useless extension candidates. Maximal degree in co-relation 23132. Up to 2612 conditions per place. [2024-06-20 15:16:08,590 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 156 selfloop transitions, 157 changer transitions 0/320 dead transitions. [2024-06-20 15:16:08,590 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 320 transitions, 5003 flow [2024-06-20 15:16:08,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:16:08,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:16:08,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-20 15:16:08,591 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6357142857142857 [2024-06-20 15:16:08,591 INFO L175 Difference]: Start difference. First operand has 224 places, 295 transitions, 4103 flow. Second operand 7 states and 178 transitions. [2024-06-20 15:16:08,591 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 320 transitions, 5003 flow [2024-06-20 15:16:09,072 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 320 transitions, 4775 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-20 15:16:09,076 INFO L231 Difference]: Finished difference. Result has 225 places, 295 transitions, 4210 flow [2024-06-20 15:16:09,076 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3875, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=157, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4210, PETRI_PLACES=225, PETRI_TRANSITIONS=295} [2024-06-20 15:16:09,076 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 184 predicate places. [2024-06-20 15:16:09,076 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 295 transitions, 4210 flow [2024-06-20 15:16:09,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:09,076 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:16:09,076 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:16:09,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-20 15:16:09,076 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:16:09,077 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:16:09,077 INFO L85 PathProgramCache]: Analyzing trace with hash -1587743145, now seen corresponding path program 11 times [2024-06-20 15:16:09,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:16:09,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032482007] [2024-06-20 15:16:09,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:16:09,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:16:09,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:16:09,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:16:09,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:16:09,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032482007] [2024-06-20 15:16:09,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032482007] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:16:09,156 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:16:09,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:16:09,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047699456] [2024-06-20 15:16:09,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:16:09,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:16:09,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:16:09,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:16:09,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:16:09,193 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:16:09,193 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 295 transitions, 4210 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:09,193 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:16:09,193 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:16:09,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:16:09,632 INFO L124 PetriNetUnfolderBase]: 2032/3405 cut-off events. [2024-06-20 15:16:09,632 INFO L125 PetriNetUnfolderBase]: For 172678/172678 co-relation queries the response was YES. [2024-06-20 15:16:09,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23386 conditions, 3405 events. 2032/3405 cut-off events. For 172678/172678 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 20577 event pairs, 449 based on Foata normal form. 2/3402 useless extension candidates. Maximal degree in co-relation 23279. Up to 2609 conditions per place. [2024-06-20 15:16:09,665 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 152 selfloop transitions, 169 changer transitions 0/328 dead transitions. [2024-06-20 15:16:09,665 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 328 transitions, 5150 flow [2024-06-20 15:16:09,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:16:09,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:16:09,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 224 transitions. [2024-06-20 15:16:09,666 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6222222222222222 [2024-06-20 15:16:09,666 INFO L175 Difference]: Start difference. First operand has 225 places, 295 transitions, 4210 flow. Second operand 9 states and 224 transitions. [2024-06-20 15:16:09,666 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 328 transitions, 5150 flow [2024-06-20 15:16:10,118 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 328 transitions, 4709 flow, removed 21 selfloop flow, removed 9 redundant places. [2024-06-20 15:16:10,122 INFO L231 Difference]: Finished difference. Result has 225 places, 295 transitions, 4135 flow [2024-06-20 15:16:10,122 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3777, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=169, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4135, PETRI_PLACES=225, PETRI_TRANSITIONS=295} [2024-06-20 15:16:10,122 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 184 predicate places. [2024-06-20 15:16:10,122 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 295 transitions, 4135 flow [2024-06-20 15:16:10,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:10,123 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:16:10,123 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:16:10,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-20 15:16:10,123 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:16:10,123 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:16:10,123 INFO L85 PathProgramCache]: Analyzing trace with hash -1764874665, now seen corresponding path program 12 times [2024-06-20 15:16:10,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:16:10,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418329600] [2024-06-20 15:16:10,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:16:10,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:16:10,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:16:10,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:16:10,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:16:10,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418329600] [2024-06-20 15:16:10,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418329600] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:16:10,204 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:16:10,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:16:10,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101650324] [2024-06-20 15:16:10,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:16:10,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:16:10,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:16:10,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:16:10,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:16:10,239 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:16:10,240 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 295 transitions, 4135 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:10,240 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:16:10,240 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:16:10,240 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:16:10,783 INFO L124 PetriNetUnfolderBase]: 2016/3381 cut-off events. [2024-06-20 15:16:10,783 INFO L125 PetriNetUnfolderBase]: For 162767/162770 co-relation queries the response was YES. [2024-06-20 15:16:10,808 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22799 conditions, 3381 events. 2016/3381 cut-off events. For 162767/162770 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 20464 event pairs, 435 based on Foata normal form. 6/3376 useless extension candidates. Maximal degree in co-relation 22693. Up to 2596 conditions per place. [2024-06-20 15:16:10,822 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 160 selfloop transitions, 160 changer transitions 0/327 dead transitions. [2024-06-20 15:16:10,822 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 327 transitions, 5067 flow [2024-06-20 15:16:10,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:16:10,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:16:10,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 207 transitions. [2024-06-20 15:16:10,824 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.646875 [2024-06-20 15:16:10,824 INFO L175 Difference]: Start difference. First operand has 225 places, 295 transitions, 4135 flow. Second operand 8 states and 207 transitions. [2024-06-20 15:16:10,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 327 transitions, 5067 flow [2024-06-20 15:16:11,257 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 327 transitions, 4670 flow, removed 23 selfloop flow, removed 11 redundant places. [2024-06-20 15:16:11,261 INFO L231 Difference]: Finished difference. Result has 222 places, 295 transitions, 4093 flow [2024-06-20 15:16:11,261 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3750, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=160, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4093, PETRI_PLACES=222, PETRI_TRANSITIONS=295} [2024-06-20 15:16:11,262 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 181 predicate places. [2024-06-20 15:16:11,262 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 295 transitions, 4093 flow [2024-06-20 15:16:11,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:11,262 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:16:11,262 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:16:11,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-20 15:16:11,262 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:16:11,263 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:16:11,263 INFO L85 PathProgramCache]: Analyzing trace with hash -1351321521, now seen corresponding path program 1 times [2024-06-20 15:16:11,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:16:11,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492600926] [2024-06-20 15:16:11,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:16:11,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:16:11,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:16:11,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:16:11,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:16:11,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492600926] [2024-06-20 15:16:11,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492600926] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:16:11,347 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:16:11,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:16:11,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942621304] [2024-06-20 15:16:11,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:16:11,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:16:11,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:16:11,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:16:11,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:16:11,380 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:16:11,380 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 295 transitions, 4093 flow. Second operand has 6 states, 6 states have (on average 16.333333333333332) internal successors, (98), 6 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:11,380 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:16:11,380 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:16:11,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:16:11,785 INFO L124 PetriNetUnfolderBase]: 2008/3374 cut-off events. [2024-06-20 15:16:11,785 INFO L125 PetriNetUnfolderBase]: For 146795/146795 co-relation queries the response was YES. [2024-06-20 15:16:11,808 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22394 conditions, 3374 events. 2008/3374 cut-off events. For 146795/146795 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 20455 event pairs, 406 based on Foata normal form. 2/3374 useless extension candidates. Maximal degree in co-relation 22290. Up to 3058 conditions per place. [2024-06-20 15:16:11,819 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 287 selfloop transitions, 19 changer transitions 0/313 dead transitions. [2024-06-20 15:16:11,819 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 313 transitions, 4783 flow [2024-06-20 15:16:11,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 15:16:11,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 15:16:11,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 122 transitions. [2024-06-20 15:16:11,820 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.61 [2024-06-20 15:16:11,820 INFO L175 Difference]: Start difference. First operand has 222 places, 295 transitions, 4093 flow. Second operand 5 states and 122 transitions. [2024-06-20 15:16:11,820 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 313 transitions, 4783 flow [2024-06-20 15:16:12,111 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 313 transitions, 4435 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-20 15:16:12,114 INFO L231 Difference]: Finished difference. Result has 219 places, 297 transitions, 3830 flow [2024-06-20 15:16:12,115 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3745, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3830, PETRI_PLACES=219, PETRI_TRANSITIONS=297} [2024-06-20 15:16:12,115 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 178 predicate places. [2024-06-20 15:16:12,115 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 297 transitions, 3830 flow [2024-06-20 15:16:12,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.333333333333332) internal successors, (98), 6 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:12,115 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:16:12,115 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:16:12,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-20 15:16:12,116 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:16:12,116 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:16:12,116 INFO L85 PathProgramCache]: Analyzing trace with hash -1350846291, now seen corresponding path program 2 times [2024-06-20 15:16:12,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:16:12,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102428904] [2024-06-20 15:16:12,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:16:12,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:16:12,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:16:12,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:16:12,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:16:12,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102428904] [2024-06-20 15:16:12,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102428904] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:16:12,192 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:16:12,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:16:12,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460218308] [2024-06-20 15:16:12,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:16:12,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:16:12,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:16:12,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:16:12,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:16:12,227 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:16:12,227 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 297 transitions, 3830 flow. Second operand has 6 states, 6 states have (on average 16.333333333333332) internal successors, (98), 6 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:12,227 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:16:12,227 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:16:12,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:16:12,638 INFO L124 PetriNetUnfolderBase]: 2003/3374 cut-off events. [2024-06-20 15:16:12,638 INFO L125 PetriNetUnfolderBase]: For 137562/137567 co-relation queries the response was YES. [2024-06-20 15:16:12,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21682 conditions, 3374 events. 2003/3374 cut-off events. For 137562/137567 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 20496 event pairs, 403 based on Foata normal form. 6/3378 useless extension candidates. Maximal degree in co-relation 21578. Up to 3031 conditions per place. [2024-06-20 15:16:12,735 INFO L140 encePairwiseOnDemand]: 34/40 looper letters, 284 selfloop transitions, 19 changer transitions 0/310 dead transitions. [2024-06-20 15:16:12,735 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 310 transitions, 4504 flow [2024-06-20 15:16:12,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 15:16:12,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 15:16:12,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 115 transitions. [2024-06-20 15:16:12,736 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.575 [2024-06-20 15:16:12,736 INFO L175 Difference]: Start difference. First operand has 219 places, 297 transitions, 3830 flow. Second operand 5 states and 115 transitions. [2024-06-20 15:16:12,736 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 310 transitions, 4504 flow [2024-06-20 15:16:13,107 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 310 transitions, 4439 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-20 15:16:13,111 INFO L231 Difference]: Finished difference. Result has 221 places, 299 transitions, 3854 flow [2024-06-20 15:16:13,111 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3765, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=297, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=278, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3854, PETRI_PLACES=221, PETRI_TRANSITIONS=299} [2024-06-20 15:16:13,111 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 180 predicate places. [2024-06-20 15:16:13,112 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 299 transitions, 3854 flow [2024-06-20 15:16:13,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.333333333333332) internal successors, (98), 6 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:13,112 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:16:13,112 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:16:13,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-20 15:16:13,112 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:16:13,112 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:16:13,112 INFO L85 PathProgramCache]: Analyzing trace with hash -1151396203, now seen corresponding path program 1 times [2024-06-20 15:16:13,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:16:13,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351312966] [2024-06-20 15:16:13,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:16:13,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:16:13,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:16:13,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:16:13,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:16:13,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351312966] [2024-06-20 15:16:13,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351312966] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:16:13,187 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:16:13,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:16:13,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605745162] [2024-06-20 15:16:13,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:16:13,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:16:13,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:16:13,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:16:13,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:16:13,230 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:16:13,231 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 299 transitions, 3854 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:13,231 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:16:13,231 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:16:13,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:16:13,644 INFO L124 PetriNetUnfolderBase]: 2011/3394 cut-off events. [2024-06-20 15:16:13,644 INFO L125 PetriNetUnfolderBase]: For 143716/143716 co-relation queries the response was YES. [2024-06-20 15:16:13,665 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21918 conditions, 3394 events. 2011/3394 cut-off events. For 143716/143716 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 20682 event pairs, 374 based on Foata normal form. 2/3395 useless extension candidates. Maximal degree in co-relation 21813. Up to 3029 conditions per place. [2024-06-20 15:16:13,677 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 288 selfloop transitions, 31 changer transitions 0/326 dead transitions. [2024-06-20 15:16:13,677 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 326 transitions, 4742 flow [2024-06-20 15:16:13,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:16:13,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:16:13,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 161 transitions. [2024-06-20 15:16:13,678 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.575 [2024-06-20 15:16:13,678 INFO L175 Difference]: Start difference. First operand has 221 places, 299 transitions, 3854 flow. Second operand 7 states and 161 transitions. [2024-06-20 15:16:13,678 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 326 transitions, 4742 flow [2024-06-20 15:16:13,996 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 326 transitions, 4669 flow, removed 19 selfloop flow, removed 3 redundant places. [2024-06-20 15:16:14,000 INFO L231 Difference]: Finished difference. Result has 225 places, 303 transitions, 3944 flow [2024-06-20 15:16:14,000 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3781, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3944, PETRI_PLACES=225, PETRI_TRANSITIONS=303} [2024-06-20 15:16:14,001 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 184 predicate places. [2024-06-20 15:16:14,001 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 303 transitions, 3944 flow [2024-06-20 15:16:14,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:14,001 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:16:14,001 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:16:14,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-20 15:16:14,001 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:16:14,002 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:16:14,002 INFO L85 PathProgramCache]: Analyzing trace with hash 1636281059, now seen corresponding path program 2 times [2024-06-20 15:16:14,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:16:14,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575469438] [2024-06-20 15:16:14,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:16:14,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:16:14,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:16:14,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:16:14,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:16:14,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575469438] [2024-06-20 15:16:14,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575469438] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:16:14,093 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:16:14,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:16:14,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750357233] [2024-06-20 15:16:14,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:16:14,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:16:14,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:16:14,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:16:14,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:16:14,126 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:16:14,127 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 303 transitions, 3944 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:14,127 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:16:14,127 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:16:14,127 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:16:14,553 INFO L124 PetriNetUnfolderBase]: 2019/3406 cut-off events. [2024-06-20 15:16:14,553 INFO L125 PetriNetUnfolderBase]: For 149377/149377 co-relation queries the response was YES. [2024-06-20 15:16:14,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22153 conditions, 3406 events. 2019/3406 cut-off events. For 149377/149377 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 20772 event pairs, 405 based on Foata normal form. 2/3407 useless extension candidates. Maximal degree in co-relation 22047. Up to 3074 conditions per place. [2024-06-20 15:16:14,588 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 288 selfloop transitions, 28 changer transitions 0/323 dead transitions. [2024-06-20 15:16:14,589 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 323 transitions, 4670 flow [2024-06-20 15:16:14,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:16:14,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:16:14,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 156 transitions. [2024-06-20 15:16:14,589 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5571428571428572 [2024-06-20 15:16:14,589 INFO L175 Difference]: Start difference. First operand has 225 places, 303 transitions, 3944 flow. Second operand 7 states and 156 transitions. [2024-06-20 15:16:14,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 323 transitions, 4670 flow [2024-06-20 15:16:14,977 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 323 transitions, 4562 flow, removed 39 selfloop flow, removed 3 redundant places. [2024-06-20 15:16:14,981 INFO L231 Difference]: Finished difference. Result has 229 places, 305 transitions, 3951 flow [2024-06-20 15:16:14,981 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3854, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3951, PETRI_PLACES=229, PETRI_TRANSITIONS=305} [2024-06-20 15:16:14,981 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 188 predicate places. [2024-06-20 15:16:14,982 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 305 transitions, 3951 flow [2024-06-20 15:16:14,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:14,982 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:16:14,982 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:16:14,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-20 15:16:14,982 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:16:14,982 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:16:14,982 INFO L85 PathProgramCache]: Analyzing trace with hash -1033248073, now seen corresponding path program 3 times [2024-06-20 15:16:14,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:16:14,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801147825] [2024-06-20 15:16:14,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:16:14,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:16:14,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:16:15,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:16:15,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:16:15,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801147825] [2024-06-20 15:16:15,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801147825] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:16:15,068 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:16:15,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:16:15,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39096587] [2024-06-20 15:16:15,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:16:15,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:16:15,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:16:15,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:16:15,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:16:15,099 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:16:15,099 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 305 transitions, 3951 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:15,099 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:16:15,099 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:16:15,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:16:15,592 INFO L124 PetriNetUnfolderBase]: 2027/3418 cut-off events. [2024-06-20 15:16:15,592 INFO L125 PetriNetUnfolderBase]: For 154241/154241 co-relation queries the response was YES. [2024-06-20 15:16:15,611 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22247 conditions, 3418 events. 2027/3418 cut-off events. For 154241/154241 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 20845 event pairs, 405 based on Foata normal form. 2/3419 useless extension candidates. Maximal degree in co-relation 22139. Up to 3101 conditions per place. [2024-06-20 15:16:15,622 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 295 selfloop transitions, 20 changer transitions 0/322 dead transitions. [2024-06-20 15:16:15,622 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 322 transitions, 4653 flow [2024-06-20 15:16:15,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:16:15,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:16:15,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 152 transitions. [2024-06-20 15:16:15,623 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5428571428571428 [2024-06-20 15:16:15,623 INFO L175 Difference]: Start difference. First operand has 229 places, 305 transitions, 3951 flow. Second operand 7 states and 152 transitions. [2024-06-20 15:16:15,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 322 transitions, 4653 flow [2024-06-20 15:16:16,042 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 322 transitions, 4576 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-20 15:16:16,046 INFO L231 Difference]: Finished difference. Result has 231 places, 307 transitions, 3959 flow [2024-06-20 15:16:16,046 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3874, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=285, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3959, PETRI_PLACES=231, PETRI_TRANSITIONS=307} [2024-06-20 15:16:16,046 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 190 predicate places. [2024-06-20 15:16:16,046 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 307 transitions, 3959 flow [2024-06-20 15:16:16,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:16,046 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:16:16,047 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:16:16,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-20 15:16:16,047 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:16:16,047 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:16:16,047 INFO L85 PathProgramCache]: Analyzing trace with hash 1751756927, now seen corresponding path program 1 times [2024-06-20 15:16:16,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:16:16,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788699806] [2024-06-20 15:16:16,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:16:16,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:16:16,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:16:16,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:16:16,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:16:16,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788699806] [2024-06-20 15:16:16,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788699806] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:16:16,123 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:16:16,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:16:16,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029271587] [2024-06-20 15:16:16,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:16:16,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:16:16,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:16:16,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:16:16,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:16:16,147 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:16:16,147 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 307 transitions, 3959 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:16,148 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:16:16,148 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:16:16,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:16:16,598 INFO L124 PetriNetUnfolderBase]: 2071/3478 cut-off events. [2024-06-20 15:16:16,599 INFO L125 PetriNetUnfolderBase]: For 175504/175504 co-relation queries the response was YES. [2024-06-20 15:16:16,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22611 conditions, 3478 events. 2071/3478 cut-off events. For 175504/175504 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 21176 event pairs, 446 based on Foata normal form. 12/3485 useless extension candidates. Maximal degree in co-relation 22502. Up to 2900 conditions per place. [2024-06-20 15:16:16,633 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 238 selfloop transitions, 83 changer transitions 0/328 dead transitions. [2024-06-20 15:16:16,633 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 328 transitions, 4713 flow [2024-06-20 15:16:16,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:16:16,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:16:16,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-20 15:16:16,634 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-20 15:16:16,634 INFO L175 Difference]: Start difference. First operand has 231 places, 307 transitions, 3959 flow. Second operand 7 states and 168 transitions. [2024-06-20 15:16:16,634 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 328 transitions, 4713 flow [2024-06-20 15:16:17,037 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 328 transitions, 4648 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-20 15:16:17,041 INFO L231 Difference]: Finished difference. Result has 233 places, 310 transitions, 4131 flow [2024-06-20 15:16:17,041 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3894, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=307, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4131, PETRI_PLACES=233, PETRI_TRANSITIONS=310} [2024-06-20 15:16:17,042 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 192 predicate places. [2024-06-20 15:16:17,042 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 310 transitions, 4131 flow [2024-06-20 15:16:17,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:17,042 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:16:17,042 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:16:17,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-20 15:16:17,042 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:16:17,042 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:16:17,042 INFO L85 PathProgramCache]: Analyzing trace with hash -1587497067, now seen corresponding path program 4 times [2024-06-20 15:16:17,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:16:17,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911968050] [2024-06-20 15:16:17,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:16:17,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:16:17,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:16:17,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:16:17,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:16:17,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911968050] [2024-06-20 15:16:17,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911968050] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:16:17,146 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:16:17,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:16:17,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033180789] [2024-06-20 15:16:17,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:16:17,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:16:17,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:16:17,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:16:17,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:16:17,177 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:16:17,177 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 310 transitions, 4131 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:17,177 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:16:17,177 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:16:17,177 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:16:17,631 INFO L124 PetriNetUnfolderBase]: 2066/3479 cut-off events. [2024-06-20 15:16:17,631 INFO L125 PetriNetUnfolderBase]: For 163328/163328 co-relation queries the response was YES. [2024-06-20 15:16:17,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22906 conditions, 3479 events. 2066/3479 cut-off events. For 163328/163328 co-relation queries the response was YES. Maximal size of possible extension queue 249. Compared 21224 event pairs, 377 based on Foata normal form. 2/3480 useless extension candidates. Maximal degree in co-relation 22796. Up to 3126 conditions per place. [2024-06-20 15:16:17,665 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 294 selfloop transitions, 29 changer transitions 0/330 dead transitions. [2024-06-20 15:16:17,665 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 330 transitions, 4827 flow [2024-06-20 15:16:17,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:16:17,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:16:17,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 142 transitions. [2024-06-20 15:16:17,666 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5916666666666667 [2024-06-20 15:16:17,666 INFO L175 Difference]: Start difference. First operand has 233 places, 310 transitions, 4131 flow. Second operand 6 states and 142 transitions. [2024-06-20 15:16:17,666 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 330 transitions, 4827 flow [2024-06-20 15:16:18,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 330 transitions, 4598 flow, removed 34 selfloop flow, removed 5 redundant places. [2024-06-20 15:16:18,076 INFO L231 Difference]: Finished difference. Result has 234 places, 310 transitions, 3971 flow [2024-06-20 15:16:18,077 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3902, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=310, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3971, PETRI_PLACES=234, PETRI_TRANSITIONS=310} [2024-06-20 15:16:18,077 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 193 predicate places. [2024-06-20 15:16:18,077 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 310 transitions, 3971 flow [2024-06-20 15:16:18,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:18,077 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:16:18,077 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:16:18,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-20 15:16:18,077 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:16:18,078 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:16:18,078 INFO L85 PathProgramCache]: Analyzing trace with hash -1359411219, now seen corresponding path program 2 times [2024-06-20 15:16:18,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:16:18,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544001868] [2024-06-20 15:16:18,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:16:18,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:16:18,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:16:18,157 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:16:18,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:16:18,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544001868] [2024-06-20 15:16:18,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544001868] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:16:18,157 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:16:18,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:16:18,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926410488] [2024-06-20 15:16:18,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:16:18,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:16:18,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:16:18,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:16:18,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:16:18,191 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:16:18,191 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 310 transitions, 3971 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:18,191 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:16:18,191 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:16:18,191 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:16:18,661 INFO L124 PetriNetUnfolderBase]: 2110/3550 cut-off events. [2024-06-20 15:16:18,661 INFO L125 PetriNetUnfolderBase]: For 185289/185292 co-relation queries the response was YES. [2024-06-20 15:16:18,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22994 conditions, 3550 events. 2110/3550 cut-off events. For 185289/185292 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 21719 event pairs, 480 based on Foata normal form. 14/3556 useless extension candidates. Maximal degree in co-relation 22883. Up to 2961 conditions per place. [2024-06-20 15:16:18,697 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 246 selfloop transitions, 74 changer transitions 0/327 dead transitions. [2024-06-20 15:16:18,697 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 327 transitions, 4719 flow [2024-06-20 15:16:18,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:16:18,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:16:18,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 143 transitions. [2024-06-20 15:16:18,698 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5958333333333333 [2024-06-20 15:16:18,698 INFO L175 Difference]: Start difference. First operand has 234 places, 310 transitions, 3971 flow. Second operand 6 states and 143 transitions. [2024-06-20 15:16:18,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 327 transitions, 4719 flow [2024-06-20 15:16:19,113 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 327 transitions, 4652 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-20 15:16:19,117 INFO L231 Difference]: Finished difference. Result has 235 places, 313 transitions, 4129 flow [2024-06-20 15:16:19,117 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3904, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=310, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4129, PETRI_PLACES=235, PETRI_TRANSITIONS=313} [2024-06-20 15:16:19,117 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 194 predicate places. [2024-06-20 15:16:19,117 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 313 transitions, 4129 flow [2024-06-20 15:16:19,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:19,117 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:16:19,117 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:16:19,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-20 15:16:19,118 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:16:19,118 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:16:19,118 INFO L85 PathProgramCache]: Analyzing trace with hash -1350840339, now seen corresponding path program 3 times [2024-06-20 15:16:19,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:16:19,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29631664] [2024-06-20 15:16:19,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:16:19,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:16:19,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:16:19,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:16:19,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:16:19,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29631664] [2024-06-20 15:16:19,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29631664] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:16:19,198 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:16:19,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:16:19,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025478388] [2024-06-20 15:16:19,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:16:19,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:16:19,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:16:19,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:16:19,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:16:19,232 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:16:19,232 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 313 transitions, 4129 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:19,232 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:16:19,232 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:16:19,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:16:19,719 INFO L124 PetriNetUnfolderBase]: 2269/3805 cut-off events. [2024-06-20 15:16:19,720 INFO L125 PetriNetUnfolderBase]: For 214910/214913 co-relation queries the response was YES. [2024-06-20 15:16:19,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25633 conditions, 3805 events. 2269/3805 cut-off events. For 214910/214913 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 23590 event pairs, 494 based on Foata normal form. 14/3811 useless extension candidates. Maximal degree in co-relation 25521. Up to 2912 conditions per place. [2024-06-20 15:16:19,759 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 254 selfloop transitions, 78 changer transitions 0/339 dead transitions. [2024-06-20 15:16:19,759 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 339 transitions, 5129 flow [2024-06-20 15:16:19,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:16:19,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:16:19,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 147 transitions. [2024-06-20 15:16:19,760 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6125 [2024-06-20 15:16:19,760 INFO L175 Difference]: Start difference. First operand has 235 places, 313 transitions, 4129 flow. Second operand 6 states and 147 transitions. [2024-06-20 15:16:19,760 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 339 transitions, 5129 flow [2024-06-20 15:16:20,161 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 339 transitions, 4934 flow, removed 26 selfloop flow, removed 4 redundant places. [2024-06-20 15:16:20,165 INFO L231 Difference]: Finished difference. Result has 238 places, 319 transitions, 4254 flow [2024-06-20 15:16:20,165 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3934, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4254, PETRI_PLACES=238, PETRI_TRANSITIONS=319} [2024-06-20 15:16:20,165 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 197 predicate places. [2024-06-20 15:16:20,165 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 319 transitions, 4254 flow [2024-06-20 15:16:20,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:20,165 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:16:20,166 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:16:20,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-20 15:16:20,166 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:16:20,166 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:16:20,166 INFO L85 PathProgramCache]: Analyzing trace with hash -1587312369, now seen corresponding path program 4 times [2024-06-20 15:16:20,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:16:20,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883540264] [2024-06-20 15:16:20,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:16:20,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:16:20,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:16:20,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:16:20,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:16:20,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883540264] [2024-06-20 15:16:20,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883540264] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:16:20,250 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:16:20,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:16:20,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30738933] [2024-06-20 15:16:20,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:16:20,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:16:20,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:16:20,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:16:20,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:16:20,281 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:16:20,281 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 319 transitions, 4254 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:20,281 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:16:20,281 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:16:20,281 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:16:20,785 INFO L124 PetriNetUnfolderBase]: 2287/3824 cut-off events. [2024-06-20 15:16:20,785 INFO L125 PetriNetUnfolderBase]: For 217378/217378 co-relation queries the response was YES. [2024-06-20 15:16:20,812 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25889 conditions, 3824 events. 2287/3824 cut-off events. For 217378/217378 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 23616 event pairs, 510 based on Foata normal form. 12/3831 useless extension candidates. Maximal degree in co-relation 25775. Up to 3192 conditions per place. [2024-06-20 15:16:20,827 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 243 selfloop transitions, 88 changer transitions 0/338 dead transitions. [2024-06-20 15:16:20,827 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 338 transitions, 5017 flow [2024-06-20 15:16:20,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:16:20,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:16:20,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 147 transitions. [2024-06-20 15:16:20,827 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6125 [2024-06-20 15:16:20,828 INFO L175 Difference]: Start difference. First operand has 238 places, 319 transitions, 4254 flow. Second operand 6 states and 147 transitions. [2024-06-20 15:16:20,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 338 transitions, 5017 flow [2024-06-20 15:16:21,273 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 338 transitions, 4861 flow, removed 36 selfloop flow, removed 2 redundant places. [2024-06-20 15:16:21,277 INFO L231 Difference]: Finished difference. Result has 242 places, 321 transitions, 4339 flow [2024-06-20 15:16:21,277 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4100, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=319, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4339, PETRI_PLACES=242, PETRI_TRANSITIONS=321} [2024-06-20 15:16:21,278 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 201 predicate places. [2024-06-20 15:16:21,278 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 321 transitions, 4339 flow [2024-06-20 15:16:21,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:21,278 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:16:21,278 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:16:21,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-20 15:16:21,278 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:16:21,278 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:16:21,278 INFO L85 PathProgramCache]: Analyzing trace with hash -1957778289, now seen corresponding path program 1 times [2024-06-20 15:16:21,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:16:21,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935370377] [2024-06-20 15:16:21,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:16:21,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:16:21,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:16:21,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:16:21,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:16:21,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935370377] [2024-06-20 15:16:21,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935370377] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:16:21,355 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:16:21,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:16:21,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206481331] [2024-06-20 15:16:21,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:16:21,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:16:21,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:16:21,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:16:21,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:16:21,389 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:16:21,390 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 321 transitions, 4339 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:21,390 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:16:21,390 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:16:21,390 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:16:21,942 INFO L124 PetriNetUnfolderBase]: 2462/4117 cut-off events. [2024-06-20 15:16:21,942 INFO L125 PetriNetUnfolderBase]: For 262704/262712 co-relation queries the response was YES. [2024-06-20 15:16:21,971 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28754 conditions, 4117 events. 2462/4117 cut-off events. For 262704/262712 co-relation queries the response was YES. Maximal size of possible extension queue 280. Compared 25644 event pairs, 455 based on Foata normal form. 18/4129 useless extension candidates. Maximal degree in co-relation 28638. Up to 3167 conditions per place. [2024-06-20 15:16:21,985 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 269 selfloop transitions, 83 changer transitions 0/359 dead transitions. [2024-06-20 15:16:21,986 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 359 transitions, 5376 flow [2024-06-20 15:16:21,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:16:21,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:16:21,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-20 15:16:21,986 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6178571428571429 [2024-06-20 15:16:21,986 INFO L175 Difference]: Start difference. First operand has 242 places, 321 transitions, 4339 flow. Second operand 7 states and 173 transitions. [2024-06-20 15:16:21,986 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 359 transitions, 5376 flow [2024-06-20 15:16:22,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 359 transitions, 5164 flow, removed 23 selfloop flow, removed 4 redundant places. [2024-06-20 15:16:22,520 INFO L231 Difference]: Finished difference. Result has 247 places, 330 transitions, 4463 flow [2024-06-20 15:16:22,521 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4127, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=321, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4463, PETRI_PLACES=247, PETRI_TRANSITIONS=330} [2024-06-20 15:16:22,521 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 206 predicate places. [2024-06-20 15:16:22,521 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 330 transitions, 4463 flow [2024-06-20 15:16:22,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:22,521 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:16:22,521 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:16:22,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-20 15:16:22,521 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:16:22,521 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:16:22,521 INFO L85 PathProgramCache]: Analyzing trace with hash 1522189323, now seen corresponding path program 2 times [2024-06-20 15:16:22,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:16:22,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147132761] [2024-06-20 15:16:22,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:16:22,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:16:22,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:16:22,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:16:22,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:16:22,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147132761] [2024-06-20 15:16:22,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147132761] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:16:22,613 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:16:22,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:16:22,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782533716] [2024-06-20 15:16:22,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:16:22,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:16:22,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:16:22,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:16:22,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:16:22,663 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:16:22,664 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 330 transitions, 4463 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:22,664 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:16:22,664 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:16:22,664 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:16:23,247 INFO L124 PetriNetUnfolderBase]: 2518/4219 cut-off events. [2024-06-20 15:16:23,247 INFO L125 PetriNetUnfolderBase]: For 280808/280816 co-relation queries the response was YES. [2024-06-20 15:16:23,277 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29692 conditions, 4219 events. 2518/4219 cut-off events. For 280808/280816 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 26602 event pairs, 584 based on Foata normal form. 22/4235 useless extension candidates. Maximal degree in co-relation 29573. Up to 3577 conditions per place. [2024-06-20 15:16:23,291 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 273 selfloop transitions, 73 changer transitions 0/353 dead transitions. [2024-06-20 15:16:23,291 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 353 transitions, 5256 flow [2024-06-20 15:16:23,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:16:23,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:16:23,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2024-06-20 15:16:23,292 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5928571428571429 [2024-06-20 15:16:23,292 INFO L175 Difference]: Start difference. First operand has 247 places, 330 transitions, 4463 flow. Second operand 7 states and 166 transitions. [2024-06-20 15:16:23,292 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 353 transitions, 5256 flow [2024-06-20 15:16:23,890 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 353 transitions, 5083 flow, removed 19 selfloop flow, removed 3 redundant places. [2024-06-20 15:16:23,894 INFO L231 Difference]: Finished difference. Result has 251 places, 332 transitions, 4485 flow [2024-06-20 15:16:23,894 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4290, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=330, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4485, PETRI_PLACES=251, PETRI_TRANSITIONS=332} [2024-06-20 15:16:23,895 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 210 predicate places. [2024-06-20 15:16:23,895 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 332 transitions, 4485 flow [2024-06-20 15:16:23,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:23,895 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:16:23,895 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:16:23,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-20 15:16:23,895 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:16:23,895 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:16:23,895 INFO L85 PathProgramCache]: Analyzing trace with hash 1521862893, now seen corresponding path program 3 times [2024-06-20 15:16:23,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:16:23,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222056486] [2024-06-20 15:16:23,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:16:23,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:16:23,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:16:23,975 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:16:23,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:16:23,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222056486] [2024-06-20 15:16:23,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222056486] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:16:23,975 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:16:23,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:16:23,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303134828] [2024-06-20 15:16:23,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:16:23,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:16:23,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:16:23,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:16:23,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:16:24,017 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:16:24,017 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 332 transitions, 4485 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:24,017 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:16:24,017 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:16:24,017 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:16:24,642 INFO L124 PetriNetUnfolderBase]: 2574/4315 cut-off events. [2024-06-20 15:16:24,642 INFO L125 PetriNetUnfolderBase]: For 282188/282196 co-relation queries the response was YES. [2024-06-20 15:16:24,673 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30318 conditions, 4315 events. 2574/4315 cut-off events. For 282188/282196 co-relation queries the response was YES. Maximal size of possible extension queue 290. Compared 27374 event pairs, 584 based on Foata normal form. 18/4327 useless extension candidates. Maximal degree in co-relation 30198. Up to 3605 conditions per place. [2024-06-20 15:16:24,688 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 277 selfloop transitions, 77 changer transitions 0/361 dead transitions. [2024-06-20 15:16:24,688 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 361 transitions, 5343 flow [2024-06-20 15:16:24,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:16:24,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:16:24,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-06-20 15:16:24,689 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6035714285714285 [2024-06-20 15:16:24,689 INFO L175 Difference]: Start difference. First operand has 251 places, 332 transitions, 4485 flow. Second operand 7 states and 169 transitions. [2024-06-20 15:16:24,689 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 361 transitions, 5343 flow [2024-06-20 15:16:25,237 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 361 transitions, 5183 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-20 15:16:25,241 INFO L231 Difference]: Finished difference. Result has 254 places, 337 transitions, 4578 flow [2024-06-20 15:16:25,242 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4325, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=332, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=255, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4578, PETRI_PLACES=254, PETRI_TRANSITIONS=337} [2024-06-20 15:16:25,242 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 213 predicate places. [2024-06-20 15:16:25,242 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 337 transitions, 4578 flow [2024-06-20 15:16:25,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:25,242 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:16:25,242 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:16:25,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-20 15:16:25,242 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:16:25,242 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:16:25,243 INFO L85 PathProgramCache]: Analyzing trace with hash -1732806749, now seen corresponding path program 4 times [2024-06-20 15:16:25,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:16:25,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417163444] [2024-06-20 15:16:25,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:16:25,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:16:25,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:16:25,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:16:25,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:16:25,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417163444] [2024-06-20 15:16:25,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417163444] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:16:25,318 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:16:25,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:16:25,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75948169] [2024-06-20 15:16:25,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:16:25,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:16:25,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:16:25,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:16:25,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:16:25,350 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:16:25,350 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 337 transitions, 4578 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:25,350 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:16:25,351 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:16:25,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:16:25,937 INFO L124 PetriNetUnfolderBase]: 2630/4400 cut-off events. [2024-06-20 15:16:25,937 INFO L125 PetriNetUnfolderBase]: For 299809/299812 co-relation queries the response was YES. [2024-06-20 15:16:25,973 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31062 conditions, 4400 events. 2630/4400 cut-off events. For 299809/299812 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 27947 event pairs, 624 based on Foata normal form. 18/4410 useless extension candidates. Maximal degree in co-relation 30940. Up to 3753 conditions per place. [2024-06-20 15:16:25,989 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 273 selfloop transitions, 73 changer transitions 0/353 dead transitions. [2024-06-20 15:16:25,989 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 353 transitions, 5357 flow [2024-06-20 15:16:25,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:16:25,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:16:25,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 141 transitions. [2024-06-20 15:16:25,990 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5875 [2024-06-20 15:16:25,990 INFO L175 Difference]: Start difference. First operand has 254 places, 337 transitions, 4578 flow. Second operand 6 states and 141 transitions. [2024-06-20 15:16:25,990 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 353 transitions, 5357 flow [2024-06-20 15:16:26,551 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 353 transitions, 5184 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-20 15:16:26,555 INFO L231 Difference]: Finished difference. Result has 256 places, 339 transitions, 4604 flow [2024-06-20 15:16:26,555 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4405, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=337, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4604, PETRI_PLACES=256, PETRI_TRANSITIONS=339} [2024-06-20 15:16:26,556 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 215 predicate places. [2024-06-20 15:16:26,556 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 339 transitions, 4604 flow [2024-06-20 15:16:26,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:26,556 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:16:26,556 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:16:26,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-20 15:16:26,556 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:16:26,556 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:16:26,556 INFO L85 PathProgramCache]: Analyzing trace with hash -1743531509, now seen corresponding path program 5 times [2024-06-20 15:16:26,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:16:26,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253864847] [2024-06-20 15:16:26,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:16:26,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:16:26,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:16:26,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:16:26,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:16:26,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253864847] [2024-06-20 15:16:26,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253864847] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:16:26,632 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:16:26,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:16:26,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41199930] [2024-06-20 15:16:26,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:16:26,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:16:26,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:16:26,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:16:26,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:16:26,676 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:16:26,676 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 339 transitions, 4604 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:26,676 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:16:26,676 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:16:26,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:16:27,312 INFO L124 PetriNetUnfolderBase]: 2591/4346 cut-off events. [2024-06-20 15:16:27,312 INFO L125 PetriNetUnfolderBase]: For 276914/276922 co-relation queries the response was YES. [2024-06-20 15:16:27,342 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29754 conditions, 4346 events. 2591/4346 cut-off events. For 276914/276922 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 27608 event pairs, 587 based on Foata normal form. 22/4362 useless extension candidates. Maximal degree in co-relation 29631. Up to 3632 conditions per place. [2024-06-20 15:16:27,357 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 276 selfloop transitions, 76 changer transitions 0/359 dead transitions. [2024-06-20 15:16:27,357 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 359 transitions, 5368 flow [2024-06-20 15:16:27,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:16:27,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:16:27,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 147 transitions. [2024-06-20 15:16:27,358 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6125 [2024-06-20 15:16:27,358 INFO L175 Difference]: Start difference. First operand has 256 places, 339 transitions, 4604 flow. Second operand 6 states and 147 transitions. [2024-06-20 15:16:27,358 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 359 transitions, 5368 flow [2024-06-20 15:16:27,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 359 transitions, 5204 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-20 15:16:27,917 INFO L231 Difference]: Finished difference. Result has 258 places, 339 transitions, 4602 flow [2024-06-20 15:16:27,917 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4440, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=339, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4602, PETRI_PLACES=258, PETRI_TRANSITIONS=339} [2024-06-20 15:16:27,917 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 217 predicate places. [2024-06-20 15:16:27,917 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 339 transitions, 4602 flow [2024-06-20 15:16:27,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:27,918 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:16:27,918 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:16:27,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-20 15:16:27,918 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:16:27,918 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:16:27,918 INFO L85 PathProgramCache]: Analyzing trace with hash -1743857939, now seen corresponding path program 6 times [2024-06-20 15:16:27,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:16:27,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232319180] [2024-06-20 15:16:27,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:16:27,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:16:27,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:16:27,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:16:27,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:16:27,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232319180] [2024-06-20 15:16:27,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232319180] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:16:27,993 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:16:27,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:16:27,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196201481] [2024-06-20 15:16:27,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:16:27,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:16:27,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:16:27,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:16:27,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:16:28,022 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:16:28,022 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 339 transitions, 4602 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:28,022 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:16:28,022 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:16:28,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:16:28,598 INFO L124 PetriNetUnfolderBase]: 2565/4294 cut-off events. [2024-06-20 15:16:28,599 INFO L125 PetriNetUnfolderBase]: For 251205/251213 co-relation queries the response was YES. [2024-06-20 15:16:28,630 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28841 conditions, 4294 events. 2565/4294 cut-off events. For 251205/251213 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 27094 event pairs, 439 based on Foata normal form. 18/4306 useless extension candidates. Maximal degree in co-relation 28717. Up to 3230 conditions per place. [2024-06-20 15:16:28,644 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 266 selfloop transitions, 92 changer transitions 0/365 dead transitions. [2024-06-20 15:16:28,644 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 365 transitions, 5398 flow [2024-06-20 15:16:28,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:16:28,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:16:28,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-06-20 15:16:28,644 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6375 [2024-06-20 15:16:28,645 INFO L175 Difference]: Start difference. First operand has 258 places, 339 transitions, 4602 flow. Second operand 6 states and 153 transitions. [2024-06-20 15:16:28,645 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 365 transitions, 5398 flow [2024-06-20 15:16:29,224 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 365 transitions, 5212 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-20 15:16:29,228 INFO L231 Difference]: Finished difference. Result has 260 places, 339 transitions, 4611 flow [2024-06-20 15:16:29,228 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4416, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=339, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4611, PETRI_PLACES=260, PETRI_TRANSITIONS=339} [2024-06-20 15:16:29,229 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 219 predicate places. [2024-06-20 15:16:29,229 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 339 transitions, 4611 flow [2024-06-20 15:16:29,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:29,229 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:16:29,229 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:16:29,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-20 15:16:29,229 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:16:29,229 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:16:29,230 INFO L85 PathProgramCache]: Analyzing trace with hash 1502298395, now seen corresponding path program 1 times [2024-06-20 15:16:29,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:16:29,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16177656] [2024-06-20 15:16:29,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:16:29,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:16:29,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:16:29,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:16:29,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:16:29,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16177656] [2024-06-20 15:16:29,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16177656] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:16:29,299 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:16:29,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:16:29,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145650437] [2024-06-20 15:16:29,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:16:29,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:16:29,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:16:29,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:16:29,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:16:29,338 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:16:29,338 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 339 transitions, 4611 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:29,338 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:16:29,338 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:16:29,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:16:30,043 INFO L124 PetriNetUnfolderBase]: 2626/4369 cut-off events. [2024-06-20 15:16:30,043 INFO L125 PetriNetUnfolderBase]: For 242116/242116 co-relation queries the response was YES. [2024-06-20 15:16:30,075 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29947 conditions, 4369 events. 2626/4369 cut-off events. For 242116/242116 co-relation queries the response was YES. Maximal size of possible extension queue 306. Compared 27534 event pairs, 582 based on Foata normal form. 1/4350 useless extension candidates. Maximal degree in co-relation 29822. Up to 3448 conditions per place. [2024-06-20 15:16:30,090 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 196 selfloop transitions, 183 changer transitions 0/386 dead transitions. [2024-06-20 15:16:30,090 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 386 transitions, 6264 flow [2024-06-20 15:16:30,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:16:30,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:16:30,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-20 15:16:30,091 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6392857142857142 [2024-06-20 15:16:30,091 INFO L175 Difference]: Start difference. First operand has 260 places, 339 transitions, 4611 flow. Second operand 7 states and 179 transitions. [2024-06-20 15:16:30,091 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 386 transitions, 6264 flow [2024-06-20 15:16:30,763 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 386 transitions, 6054 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-20 15:16:30,768 INFO L231 Difference]: Finished difference. Result has 262 places, 359 transitions, 5114 flow [2024-06-20 15:16:30,768 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4417, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=339, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=163, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5114, PETRI_PLACES=262, PETRI_TRANSITIONS=359} [2024-06-20 15:16:30,768 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 221 predicate places. [2024-06-20 15:16:30,768 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 359 transitions, 5114 flow [2024-06-20 15:16:30,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:30,768 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:16:30,768 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:16:30,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-20 15:16:30,769 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:16:30,769 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:16:30,769 INFO L85 PathProgramCache]: Analyzing trace with hash 1509515117, now seen corresponding path program 2 times [2024-06-20 15:16:30,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:16:30,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825881724] [2024-06-20 15:16:30,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:16:30,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:16:30,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:16:30,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:16:30,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:16:30,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825881724] [2024-06-20 15:16:30,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825881724] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:16:30,855 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:16:30,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:16:30,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195740378] [2024-06-20 15:16:30,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:16:30,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:16:30,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:16:30,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:16:30,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:16:30,886 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:16:30,892 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 359 transitions, 5114 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:30,892 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:16:30,892 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:16:30,892 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:16:31,591 INFO L124 PetriNetUnfolderBase]: 2623/4364 cut-off events. [2024-06-20 15:16:31,592 INFO L125 PetriNetUnfolderBase]: For 233934/233934 co-relation queries the response was YES. [2024-06-20 15:16:31,625 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29809 conditions, 4364 events. 2623/4364 cut-off events. For 233934/233934 co-relation queries the response was YES. Maximal size of possible extension queue 306. Compared 27507 event pairs, 582 based on Foata normal form. 1/4345 useless extension candidates. Maximal degree in co-relation 29684. Up to 3446 conditions per place. [2024-06-20 15:16:31,639 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 187 selfloop transitions, 194 changer transitions 0/388 dead transitions. [2024-06-20 15:16:31,640 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 388 transitions, 6320 flow [2024-06-20 15:16:31,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:16:31,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:16:31,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 182 transitions. [2024-06-20 15:16:31,640 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.65 [2024-06-20 15:16:31,640 INFO L175 Difference]: Start difference. First operand has 262 places, 359 transitions, 5114 flow. Second operand 7 states and 182 transitions. [2024-06-20 15:16:31,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 388 transitions, 6320 flow [2024-06-20 15:16:32,222 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 388 transitions, 6056 flow, removed 31 selfloop flow, removed 2 redundant places. [2024-06-20 15:16:32,227 INFO L231 Difference]: Finished difference. Result has 267 places, 359 transitions, 5244 flow [2024-06-20 15:16:32,227 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4850, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=359, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=194, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5244, PETRI_PLACES=267, PETRI_TRANSITIONS=359} [2024-06-20 15:16:32,228 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 226 predicate places. [2024-06-20 15:16:32,228 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 359 transitions, 5244 flow [2024-06-20 15:16:32,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:32,228 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:16:32,228 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:16:32,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-20 15:16:32,228 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:16:32,229 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:16:32,229 INFO L85 PathProgramCache]: Analyzing trace with hash 1509635087, now seen corresponding path program 3 times [2024-06-20 15:16:32,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:16:32,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611319044] [2024-06-20 15:16:32,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:16:32,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:16:32,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:16:32,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:16:32,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:16:32,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611319044] [2024-06-20 15:16:32,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611319044] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:16:32,303 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:16:32,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:16:32,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406598866] [2024-06-20 15:16:32,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:16:32,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:16:32,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:16:32,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:16:32,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:16:32,351 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:16:32,351 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 359 transitions, 5244 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:32,351 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:16:32,351 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:16:32,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:16:32,979 INFO L124 PetriNetUnfolderBase]: 2628/4381 cut-off events. [2024-06-20 15:16:32,979 INFO L125 PetriNetUnfolderBase]: For 241609/241612 co-relation queries the response was YES. [2024-06-20 15:16:33,013 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30090 conditions, 4381 events. 2628/4381 cut-off events. For 241609/241612 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 27715 event pairs, 555 based on Foata normal form. 3/4373 useless extension candidates. Maximal degree in co-relation 29964. Up to 3806 conditions per place. [2024-06-20 15:16:33,027 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 292 selfloop transitions, 86 changer transitions 0/385 dead transitions. [2024-06-20 15:16:33,027 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 385 transitions, 6117 flow [2024-06-20 15:16:33,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:16:33,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:16:33,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-20 15:16:33,028 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6142857142857143 [2024-06-20 15:16:33,028 INFO L175 Difference]: Start difference. First operand has 267 places, 359 transitions, 5244 flow. Second operand 7 states and 172 transitions. [2024-06-20 15:16:33,028 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 385 transitions, 6117 flow [2024-06-20 15:16:33,555 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 385 transitions, 5499 flow, removed 25 selfloop flow, removed 7 redundant places. [2024-06-20 15:16:33,560 INFO L231 Difference]: Finished difference. Result has 267 places, 362 transitions, 4869 flow [2024-06-20 15:16:33,560 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4639, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=359, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=273, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4869, PETRI_PLACES=267, PETRI_TRANSITIONS=362} [2024-06-20 15:16:33,560 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 226 predicate places. [2024-06-20 15:16:33,560 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 362 transitions, 4869 flow [2024-06-20 15:16:33,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:33,561 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:16:33,561 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:16:33,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-20 15:16:33,561 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:16:33,561 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:16:33,561 INFO L85 PathProgramCache]: Analyzing trace with hash 1515176027, now seen corresponding path program 4 times [2024-06-20 15:16:33,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:16:33,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958150475] [2024-06-20 15:16:33,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:16:33,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:16:33,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:16:33,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:16:33,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:16:33,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958150475] [2024-06-20 15:16:33,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958150475] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:16:33,631 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:16:33,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:16:33,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023714266] [2024-06-20 15:16:33,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:16:33,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:16:33,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:16:33,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:16:33,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:16:33,654 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:16:33,654 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 362 transitions, 4869 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:33,654 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:16:33,654 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:16:33,654 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:16:34,238 INFO L124 PetriNetUnfolderBase]: 2625/4369 cut-off events. [2024-06-20 15:16:34,238 INFO L125 PetriNetUnfolderBase]: For 243343/243343 co-relation queries the response was YES. [2024-06-20 15:16:34,271 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29438 conditions, 4369 events. 2625/4369 cut-off events. For 243343/243343 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 27581 event pairs, 582 based on Foata normal form. 1/4350 useless extension candidates. Maximal degree in co-relation 29312. Up to 3448 conditions per place. [2024-06-20 15:16:34,284 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 197 selfloop transitions, 181 changer transitions 0/385 dead transitions. [2024-06-20 15:16:34,285 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 385 transitions, 6065 flow [2024-06-20 15:16:34,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:16:34,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:16:34,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-06-20 15:16:34,285 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6214285714285714 [2024-06-20 15:16:34,285 INFO L175 Difference]: Start difference. First operand has 267 places, 362 transitions, 4869 flow. Second operand 7 states and 174 transitions. [2024-06-20 15:16:34,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 385 transitions, 6065 flow [2024-06-20 15:16:34,880 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 385 transitions, 5875 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-20 15:16:34,885 INFO L231 Difference]: Finished difference. Result has 268 places, 362 transitions, 5048 flow [2024-06-20 15:16:34,885 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4679, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=362, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=181, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5048, PETRI_PLACES=268, PETRI_TRANSITIONS=362} [2024-06-20 15:16:34,885 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 227 predicate places. [2024-06-20 15:16:34,885 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 362 transitions, 5048 flow [2024-06-20 15:16:34,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:34,886 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:16:34,886 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:16:34,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-20 15:16:34,886 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:16:34,886 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:16:34,887 INFO L85 PathProgramCache]: Analyzing trace with hash 1518889517, now seen corresponding path program 5 times [2024-06-20 15:16:34,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:16:34,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006942001] [2024-06-20 15:16:34,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:16:34,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:16:34,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:16:34,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:16:34,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:16:34,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006942001] [2024-06-20 15:16:34,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006942001] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:16:34,959 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:16:34,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:16:34,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311713695] [2024-06-20 15:16:34,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:16:34,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:16:34,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:16:34,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:16:34,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:16:34,991 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:16:34,993 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 362 transitions, 5048 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:34,993 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:16:34,993 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:16:34,993 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:16:35,598 INFO L124 PetriNetUnfolderBase]: 2622/4373 cut-off events. [2024-06-20 15:16:35,598 INFO L125 PetriNetUnfolderBase]: For 249406/249409 co-relation queries the response was YES. [2024-06-20 15:16:35,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29755 conditions, 4373 events. 2622/4373 cut-off events. For 249406/249409 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 27718 event pairs, 555 based on Foata normal form. 3/4365 useless extension candidates. Maximal degree in co-relation 29629. Up to 3772 conditions per place. [2024-06-20 15:16:35,647 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 279 selfloop transitions, 97 changer transitions 0/383 dead transitions. [2024-06-20 15:16:35,647 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 383 transitions, 5990 flow [2024-06-20 15:16:35,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:16:35,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:16:35,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 203 transitions. [2024-06-20 15:16:35,648 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5638888888888889 [2024-06-20 15:16:35,648 INFO L175 Difference]: Start difference. First operand has 268 places, 362 transitions, 5048 flow. Second operand 9 states and 203 transitions. [2024-06-20 15:16:35,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 383 transitions, 5990 flow [2024-06-20 15:16:36,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 383 transitions, 5669 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-20 15:16:36,380 INFO L231 Difference]: Finished difference. Result has 274 places, 363 transitions, 4962 flow [2024-06-20 15:16:36,381 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4727, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=362, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=265, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4962, PETRI_PLACES=274, PETRI_TRANSITIONS=363} [2024-06-20 15:16:36,381 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 233 predicate places. [2024-06-20 15:16:36,381 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 363 transitions, 4962 flow [2024-06-20 15:16:36,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:36,381 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:16:36,381 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:16:36,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-20 15:16:36,381 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:16:36,382 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:16:36,382 INFO L85 PathProgramCache]: Analyzing trace with hash -65971497, now seen corresponding path program 6 times [2024-06-20 15:16:36,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:16:36,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194145822] [2024-06-20 15:16:36,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:16:36,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:16:36,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:16:36,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:16:36,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:16:36,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194145822] [2024-06-20 15:16:36,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194145822] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:16:36,455 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:16:36,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:16:36,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482924407] [2024-06-20 15:16:36,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:16:36,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:16:36,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:16:36,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:16:36,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:16:36,487 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:16:36,487 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 363 transitions, 4962 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:36,487 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:16:36,487 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:16:36,487 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:16:37,172 INFO L124 PetriNetUnfolderBase]: 2619/4369 cut-off events. [2024-06-20 15:16:37,172 INFO L125 PetriNetUnfolderBase]: For 253387/253390 co-relation queries the response was YES. [2024-06-20 15:16:37,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29542 conditions, 4369 events. 2619/4369 cut-off events. For 253387/253390 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 27654 event pairs, 555 based on Foata normal form. 3/4361 useless extension candidates. Maximal degree in co-relation 29414. Up to 3769 conditions per place. [2024-06-20 15:16:37,214 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 281 selfloop transitions, 92 changer transitions 0/380 dead transitions. [2024-06-20 15:16:37,214 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 380 transitions, 5750 flow [2024-06-20 15:16:37,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:16:37,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:16:37,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 165 transitions. [2024-06-20 15:16:37,215 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5892857142857143 [2024-06-20 15:16:37,215 INFO L175 Difference]: Start difference. First operand has 274 places, 363 transitions, 4962 flow. Second operand 7 states and 165 transitions. [2024-06-20 15:16:37,215 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 380 transitions, 5750 flow [2024-06-20 15:16:37,844 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 380 transitions, 5578 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-20 15:16:37,849 INFO L231 Difference]: Finished difference. Result has 277 places, 363 transitions, 4982 flow [2024-06-20 15:16:37,849 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4790, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=363, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4982, PETRI_PLACES=277, PETRI_TRANSITIONS=363} [2024-06-20 15:16:37,849 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 236 predicate places. [2024-06-20 15:16:37,849 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 363 transitions, 4982 flow [2024-06-20 15:16:37,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:37,849 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:16:37,850 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:16:37,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-20 15:16:37,850 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:16:37,850 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:16:37,850 INFO L85 PathProgramCache]: Analyzing trace with hash -429810129, now seen corresponding path program 1 times [2024-06-20 15:16:37,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:16:37,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424240875] [2024-06-20 15:16:37,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:16:37,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:16:37,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:16:37,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:16:37,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:16:37,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424240875] [2024-06-20 15:16:37,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424240875] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:16:37,922 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:16:37,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:16:37,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443209138] [2024-06-20 15:16:37,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:16:37,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:16:37,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:16:37,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:16:37,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:16:37,948 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:16:37,948 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 363 transitions, 4982 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:37,948 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:16:37,948 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:16:37,949 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:16:38,535 INFO L124 PetriNetUnfolderBase]: 2586/4329 cut-off events. [2024-06-20 15:16:38,535 INFO L125 PetriNetUnfolderBase]: For 260780/260783 co-relation queries the response was YES. [2024-06-20 15:16:38,570 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28623 conditions, 4329 events. 2586/4329 cut-off events. For 260780/260783 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 27467 event pairs, 542 based on Foata normal form. 14/4335 useless extension candidates. Maximal degree in co-relation 28494. Up to 3246 conditions per place. [2024-06-20 15:16:38,584 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 288 selfloop transitions, 85 changer transitions 0/380 dead transitions. [2024-06-20 15:16:38,584 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 380 transitions, 5784 flow [2024-06-20 15:16:38,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:16:38,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:16:38,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 144 transitions. [2024-06-20 15:16:38,585 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-20 15:16:38,585 INFO L175 Difference]: Start difference. First operand has 277 places, 363 transitions, 4982 flow. Second operand 6 states and 144 transitions. [2024-06-20 15:16:38,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 380 transitions, 5784 flow [2024-06-20 15:16:39,131 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 380 transitions, 5590 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-20 15:16:39,136 INFO L231 Difference]: Finished difference. Result has 277 places, 363 transitions, 4967 flow [2024-06-20 15:16:39,136 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4788, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=363, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=278, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4967, PETRI_PLACES=277, PETRI_TRANSITIONS=363} [2024-06-20 15:16:39,136 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 236 predicate places. [2024-06-20 15:16:39,136 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 363 transitions, 4967 flow [2024-06-20 15:16:39,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:39,136 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:16:39,136 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:16:39,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-20 15:16:39,137 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:16:39,137 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:16:39,137 INFO L85 PathProgramCache]: Analyzing trace with hash 1720298571, now seen corresponding path program 7 times [2024-06-20 15:16:39,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:16:39,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605866794] [2024-06-20 15:16:39,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:16:39,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:16:39,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:16:39,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:16:39,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:16:39,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605866794] [2024-06-20 15:16:39,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605866794] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:16:39,202 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:16:39,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:16:39,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373440821] [2024-06-20 15:16:39,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:16:39,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:16:39,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:16:39,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:16:39,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:16:39,225 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:16:39,225 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 363 transitions, 4967 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:39,225 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:16:39,225 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:16:39,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:16:39,824 INFO L124 PetriNetUnfolderBase]: 2591/4338 cut-off events. [2024-06-20 15:16:39,825 INFO L125 PetriNetUnfolderBase]: For 242397/242400 co-relation queries the response was YES. [2024-06-20 15:16:39,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28869 conditions, 4338 events. 2591/4338 cut-off events. For 242397/242400 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 27579 event pairs, 588 based on Foata normal form. 3/4333 useless extension candidates. Maximal degree in co-relation 28739. Up to 3397 conditions per place. [2024-06-20 15:16:39,873 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 224 selfloop transitions, 157 changer transitions 0/388 dead transitions. [2024-06-20 15:16:39,873 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 388 transitions, 6101 flow [2024-06-20 15:16:39,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:16:39,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:16:39,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-20 15:16:39,874 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6107142857142858 [2024-06-20 15:16:39,874 INFO L175 Difference]: Start difference. First operand has 277 places, 363 transitions, 4967 flow. Second operand 7 states and 171 transitions. [2024-06-20 15:16:39,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 388 transitions, 6101 flow [2024-06-20 15:16:40,489 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 388 transitions, 5866 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-20 15:16:40,493 INFO L231 Difference]: Finished difference. Result has 278 places, 366 transitions, 5098 flow [2024-06-20 15:16:40,494 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4732, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=363, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=154, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5098, PETRI_PLACES=278, PETRI_TRANSITIONS=366} [2024-06-20 15:16:40,494 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 237 predicate places. [2024-06-20 15:16:40,494 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 366 transitions, 5098 flow [2024-06-20 15:16:40,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:40,494 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:16:40,494 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:16:40,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-20 15:16:40,495 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:16:40,495 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:16:40,495 INFO L85 PathProgramCache]: Analyzing trace with hash 1720597101, now seen corresponding path program 8 times [2024-06-20 15:16:40,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:16:40,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744882281] [2024-06-20 15:16:40,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:16:40,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:16:40,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:16:40,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:16:40,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:16:40,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744882281] [2024-06-20 15:16:40,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744882281] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:16:40,564 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:16:40,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:16:40,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703269111] [2024-06-20 15:16:40,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:16:40,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:16:40,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:16:40,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:16:40,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:16:40,587 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:16:40,587 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 366 transitions, 5098 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:40,587 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:16:40,587 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:16:40,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:16:41,223 INFO L124 PetriNetUnfolderBase]: 2596/4347 cut-off events. [2024-06-20 15:16:41,223 INFO L125 PetriNetUnfolderBase]: For 247914/247917 co-relation queries the response was YES. [2024-06-20 15:16:41,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28817 conditions, 4347 events. 2596/4347 cut-off events. For 247914/247917 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 27651 event pairs, 588 based on Foata normal form. 3/4342 useless extension candidates. Maximal degree in co-relation 28687. Up to 3401 conditions per place. [2024-06-20 15:16:41,275 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 224 selfloop transitions, 157 changer transitions 0/388 dead transitions. [2024-06-20 15:16:41,276 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 388 transitions, 6234 flow [2024-06-20 15:16:41,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:16:41,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:16:41,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-20 15:16:41,276 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-20 15:16:41,276 INFO L175 Difference]: Start difference. First operand has 278 places, 366 transitions, 5098 flow. Second operand 7 states and 168 transitions. [2024-06-20 15:16:41,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 388 transitions, 6234 flow [2024-06-20 15:16:41,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 388 transitions, 5846 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-20 15:16:41,947 INFO L231 Difference]: Finished difference. Result has 280 places, 369 transitions, 5082 flow [2024-06-20 15:16:41,947 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4722, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=154, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5082, PETRI_PLACES=280, PETRI_TRANSITIONS=369} [2024-06-20 15:16:41,947 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 239 predicate places. [2024-06-20 15:16:41,947 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 369 transitions, 5082 flow [2024-06-20 15:16:41,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:41,948 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:16:41,948 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:16:41,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-20 15:16:41,948 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:16:41,948 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:16:41,948 INFO L85 PathProgramCache]: Analyzing trace with hash -503547387, now seen corresponding path program 9 times [2024-06-20 15:16:41,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:16:41,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677381320] [2024-06-20 15:16:41,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:16:41,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:16:41,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:16:42,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:16:42,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:16:42,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677381320] [2024-06-20 15:16:42,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677381320] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:16:42,019 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:16:42,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:16:42,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777558880] [2024-06-20 15:16:42,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:16:42,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:16:42,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:16:42,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:16:42,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:16:42,045 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:16:42,046 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 369 transitions, 5082 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:42,046 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:16:42,046 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:16:42,046 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:16:42,642 INFO L124 PetriNetUnfolderBase]: 2590/4339 cut-off events. [2024-06-20 15:16:42,643 INFO L125 PetriNetUnfolderBase]: For 250865/250868 co-relation queries the response was YES. [2024-06-20 15:16:42,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28641 conditions, 4339 events. 2590/4339 cut-off events. For 250865/250868 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 27623 event pairs, 588 based on Foata normal form. 4/4335 useless extension candidates. Maximal degree in co-relation 28510. Up to 3396 conditions per place. [2024-06-20 15:16:42,692 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 230 selfloop transitions, 148 changer transitions 0/385 dead transitions. [2024-06-20 15:16:42,692 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 385 transitions, 6156 flow [2024-06-20 15:16:42,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:16:42,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:16:42,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2024-06-20 15:16:42,693 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5928571428571429 [2024-06-20 15:16:42,693 INFO L175 Difference]: Start difference. First operand has 280 places, 369 transitions, 5082 flow. Second operand 7 states and 166 transitions. [2024-06-20 15:16:42,693 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 385 transitions, 6156 flow [2024-06-20 15:16:43,372 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 385 transitions, 5856 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-20 15:16:43,377 INFO L231 Difference]: Finished difference. Result has 283 places, 369 transitions, 5085 flow [2024-06-20 15:16:43,377 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4782, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=369, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5085, PETRI_PLACES=283, PETRI_TRANSITIONS=369} [2024-06-20 15:16:43,377 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 242 predicate places. [2024-06-20 15:16:43,377 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 369 transitions, 5085 flow [2024-06-20 15:16:43,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:43,378 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:16:43,378 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:16:43,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-20 15:16:43,378 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:16:43,378 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:16:43,378 INFO L85 PathProgramCache]: Analyzing trace with hash -629975693, now seen corresponding path program 10 times [2024-06-20 15:16:43,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:16:43,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551042787] [2024-06-20 15:16:43,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:16:43,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:16:43,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:16:43,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:16:43,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:16:43,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551042787] [2024-06-20 15:16:43,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551042787] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:16:43,451 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:16:43,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:16:43,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446488935] [2024-06-20 15:16:43,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:16:43,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:16:43,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:16:43,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:16:43,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:16:43,481 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:16:43,481 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 369 transitions, 5085 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:43,481 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:16:43,481 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:16:43,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:16:44,172 INFO L124 PetriNetUnfolderBase]: 2584/4331 cut-off events. [2024-06-20 15:16:44,172 INFO L125 PetriNetUnfolderBase]: For 252292/252295 co-relation queries the response was YES. [2024-06-20 15:16:44,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28530 conditions, 4331 events. 2584/4331 cut-off events. For 252292/252295 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 27568 event pairs, 588 based on Foata normal form. 4/4327 useless extension candidates. Maximal degree in co-relation 28398. Up to 3466 conditions per place. [2024-06-20 15:16:44,214 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 251 selfloop transitions, 131 changer transitions 0/389 dead transitions. [2024-06-20 15:16:44,214 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 389 transitions, 6041 flow [2024-06-20 15:16:44,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:16:44,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:16:44,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 152 transitions. [2024-06-20 15:16:44,215 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6333333333333333 [2024-06-20 15:16:44,215 INFO L175 Difference]: Start difference. First operand has 283 places, 369 transitions, 5085 flow. Second operand 6 states and 152 transitions. [2024-06-20 15:16:44,215 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 389 transitions, 6041 flow [2024-06-20 15:16:45,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 389 transitions, 5736 flow, removed 23 selfloop flow, removed 4 redundant places. [2024-06-20 15:16:45,057 INFO L231 Difference]: Finished difference. Result has 285 places, 369 transitions, 5054 flow [2024-06-20 15:16:45,057 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4780, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=369, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5054, PETRI_PLACES=285, PETRI_TRANSITIONS=369} [2024-06-20 15:16:45,057 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 244 predicate places. [2024-06-20 15:16:45,058 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 369 transitions, 5054 flow [2024-06-20 15:16:45,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:45,058 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:16:45,058 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:16:45,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-20 15:16:45,058 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:16:45,058 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:16:45,058 INFO L85 PathProgramCache]: Analyzing trace with hash -630183083, now seen corresponding path program 11 times [2024-06-20 15:16:45,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:16:45,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155828886] [2024-06-20 15:16:45,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:16:45,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:16:45,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:16:45,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:16:45,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:16:45,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155828886] [2024-06-20 15:16:45,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155828886] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:16:45,131 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:16:45,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:16:45,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491998005] [2024-06-20 15:16:45,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:16:45,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:16:45,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:16:45,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:16:45,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:16:45,161 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:16:45,161 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 369 transitions, 5054 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:45,161 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:16:45,161 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:16:45,161 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:16:45,814 INFO L124 PetriNetUnfolderBase]: 2578/4312 cut-off events. [2024-06-20 15:16:45,814 INFO L125 PetriNetUnfolderBase]: For 251101/251104 co-relation queries the response was YES. [2024-06-20 15:16:45,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28343 conditions, 4312 events. 2578/4312 cut-off events. For 251101/251104 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 27377 event pairs, 534 based on Foata normal form. 4/4305 useless extension candidates. Maximal degree in co-relation 28210. Up to 3461 conditions per place. [2024-06-20 15:16:45,865 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 216 selfloop transitions, 185 changer transitions 0/408 dead transitions. [2024-06-20 15:16:45,865 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 408 transitions, 6242 flow [2024-06-20 15:16:45,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:16:45,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:16:45,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 232 transitions. [2024-06-20 15:16:45,866 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6444444444444445 [2024-06-20 15:16:45,866 INFO L175 Difference]: Start difference. First operand has 285 places, 369 transitions, 5054 flow. Second operand 9 states and 232 transitions. [2024-06-20 15:16:45,866 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 408 transitions, 6242 flow [2024-06-20 15:16:46,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 408 transitions, 5917 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-20 15:16:46,561 INFO L231 Difference]: Finished difference. Result has 287 places, 369 transitions, 5122 flow [2024-06-20 15:16:46,561 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4733, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=369, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=185, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5122, PETRI_PLACES=287, PETRI_TRANSITIONS=369} [2024-06-20 15:16:46,561 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 246 predicate places. [2024-06-20 15:16:46,561 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 369 transitions, 5122 flow [2024-06-20 15:16:46,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:46,561 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:16:46,561 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:16:46,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-20 15:16:46,561 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:16:46,562 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:16:46,562 INFO L85 PathProgramCache]: Analyzing trace with hash 353302939, now seen corresponding path program 12 times [2024-06-20 15:16:46,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:16:46,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736120985] [2024-06-20 15:16:46,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:16:46,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:16:46,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:16:46,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:16:46,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:16:46,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736120985] [2024-06-20 15:16:46,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736120985] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:16:46,629 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:16:46,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:16:46,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720236805] [2024-06-20 15:16:46,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:16:46,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:16:46,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:16:46,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:16:46,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:16:46,660 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:16:46,661 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 369 transitions, 5122 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:46,661 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:16:46,661 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:16:46,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:16:47,284 INFO L124 PetriNetUnfolderBase]: 2572/4304 cut-off events. [2024-06-20 15:16:47,284 INFO L125 PetriNetUnfolderBase]: For 245378/245381 co-relation queries the response was YES. [2024-06-20 15:16:47,319 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28291 conditions, 4304 events. 2572/4304 cut-off events. For 245378/245381 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 27329 event pairs, 534 based on Foata normal form. 4/4297 useless extension candidates. Maximal degree in co-relation 28158. Up to 3456 conditions per place. [2024-06-20 15:16:47,333 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 226 selfloop transitions, 167 changer transitions 0/400 dead transitions. [2024-06-20 15:16:47,333 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 400 transitions, 6130 flow [2024-06-20 15:16:47,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:16:47,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:16:47,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 205 transitions. [2024-06-20 15:16:47,334 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.640625 [2024-06-20 15:16:47,334 INFO L175 Difference]: Start difference. First operand has 287 places, 369 transitions, 5122 flow. Second operand 8 states and 205 transitions. [2024-06-20 15:16:47,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 400 transitions, 6130 flow [2024-06-20 15:16:47,883 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 400 transitions, 5684 flow, removed 12 selfloop flow, removed 11 redundant places. [2024-06-20 15:16:47,888 INFO L231 Difference]: Finished difference. Result has 284 places, 369 transitions, 5036 flow [2024-06-20 15:16:47,888 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4682, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=369, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=167, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5036, PETRI_PLACES=284, PETRI_TRANSITIONS=369} [2024-06-20 15:16:47,888 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 243 predicate places. [2024-06-20 15:16:47,888 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 369 transitions, 5036 flow [2024-06-20 15:16:47,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:47,888 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:16:47,888 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:16:47,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-20 15:16:47,888 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:16:47,889 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:16:47,889 INFO L85 PathProgramCache]: Analyzing trace with hash 1042640653, now seen corresponding path program 2 times [2024-06-20 15:16:47,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:16:47,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581745813] [2024-06-20 15:16:47,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:16:47,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:16:47,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:16:47,968 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:16:47,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:16:47,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581745813] [2024-06-20 15:16:47,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581745813] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:16:47,968 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:16:47,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:16:47,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422592054] [2024-06-20 15:16:47,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:16:47,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:16:47,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:16:47,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:16:47,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:16:48,015 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:16:48,016 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 369 transitions, 5036 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:48,016 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:16:48,016 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:16:48,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:16:48,590 INFO L124 PetriNetUnfolderBase]: 2546/4268 cut-off events. [2024-06-20 15:16:48,590 INFO L125 PetriNetUnfolderBase]: For 228412/228415 co-relation queries the response was YES. [2024-06-20 15:16:48,624 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27034 conditions, 4268 events. 2546/4268 cut-off events. For 228412/228415 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 26946 event pairs, 373 based on Foata normal form. 14/4271 useless extension candidates. Maximal degree in co-relation 26903. Up to 3275 conditions per place. [2024-06-20 15:16:48,638 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 303 selfloop transitions, 88 changer transitions 0/398 dead transitions. [2024-06-20 15:16:48,638 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 398 transitions, 6087 flow [2024-06-20 15:16:48,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:16:48,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:16:48,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 156 transitions. [2024-06-20 15:16:48,638 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.65 [2024-06-20 15:16:48,639 INFO L175 Difference]: Start difference. First operand has 284 places, 369 transitions, 5036 flow. Second operand 6 states and 156 transitions. [2024-06-20 15:16:48,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 398 transitions, 6087 flow [2024-06-20 15:16:49,220 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 398 transitions, 5643 flow, removed 4 selfloop flow, removed 11 redundant places. [2024-06-20 15:16:49,224 INFO L231 Difference]: Finished difference. Result has 280 places, 371 transitions, 4861 flow [2024-06-20 15:16:49,225 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4596, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=369, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=282, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4861, PETRI_PLACES=280, PETRI_TRANSITIONS=371} [2024-06-20 15:16:49,225 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 239 predicate places. [2024-06-20 15:16:49,225 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 371 transitions, 4861 flow [2024-06-20 15:16:49,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:49,225 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:16:49,225 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:16:49,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-20 15:16:49,225 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:16:49,225 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:16:49,225 INFO L85 PathProgramCache]: Analyzing trace with hash 1055585323, now seen corresponding path program 3 times [2024-06-20 15:16:49,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:16:49,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690232582] [2024-06-20 15:16:49,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:16:49,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:16:49,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:16:49,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:16:49,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:16:49,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690232582] [2024-06-20 15:16:49,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690232582] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:16:49,312 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:16:49,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:16:49,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485881534] [2024-06-20 15:16:49,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:16:49,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:16:49,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:16:49,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:16:49,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:16:49,336 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:16:49,336 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 371 transitions, 4861 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:49,336 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:16:49,336 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:16:49,336 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:16:49,942 INFO L124 PetriNetUnfolderBase]: 2580/4339 cut-off events. [2024-06-20 15:16:49,942 INFO L125 PetriNetUnfolderBase]: For 219936/219939 co-relation queries the response was YES. [2024-06-20 15:16:49,977 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27088 conditions, 4339 events. 2580/4339 cut-off events. For 219936/219939 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 27537 event pairs, 464 based on Foata normal form. 14/4345 useless extension candidates. Maximal degree in co-relation 26957. Up to 2475 conditions per place. [2024-06-20 15:16:49,990 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 312 selfloop transitions, 80 changer transitions 0/399 dead transitions. [2024-06-20 15:16:49,990 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 399 transitions, 6071 flow [2024-06-20 15:16:49,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:16:49,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:16:49,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-20 15:16:49,991 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6208333333333333 [2024-06-20 15:16:49,991 INFO L175 Difference]: Start difference. First operand has 280 places, 371 transitions, 4861 flow. Second operand 6 states and 149 transitions. [2024-06-20 15:16:49,991 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 399 transitions, 6071 flow [2024-06-20 15:16:50,659 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 399 transitions, 5917 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-20 15:16:50,663 INFO L231 Difference]: Finished difference. Result has 284 places, 374 transitions, 4954 flow [2024-06-20 15:16:50,664 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4707, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=371, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4954, PETRI_PLACES=284, PETRI_TRANSITIONS=374} [2024-06-20 15:16:50,664 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 243 predicate places. [2024-06-20 15:16:50,664 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 374 transitions, 4954 flow [2024-06-20 15:16:50,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:50,664 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:16:50,664 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:16:50,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-20 15:16:50,665 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:16:50,665 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:16:50,665 INFO L85 PathProgramCache]: Analyzing trace with hash 267633169, now seen corresponding path program 1 times [2024-06-20 15:16:50,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:16:50,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020768092] [2024-06-20 15:16:50,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:16:50,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:16:50,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:16:50,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:16:50,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:16:50,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020768092] [2024-06-20 15:16:50,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020768092] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:16:50,743 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:16:50,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:16:50,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070818047] [2024-06-20 15:16:50,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:16:50,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:16:50,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:16:50,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:16:50,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:16:50,800 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:16:50,801 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 374 transitions, 4954 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-20 15:16:50,801 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:16:50,801 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:16:50,801 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:16:51,662 INFO L124 PetriNetUnfolderBase]: 3048/5115 cut-off events. [2024-06-20 15:16:51,662 INFO L125 PetriNetUnfolderBase]: For 446761/446761 co-relation queries the response was YES. [2024-06-20 15:16:51,702 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36131 conditions, 5115 events. 3048/5115 cut-off events. For 446761/446761 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 33454 event pairs, 638 based on Foata normal form. 36/5144 useless extension candidates. Maximal degree in co-relation 35998. Up to 2985 conditions per place. [2024-06-20 15:16:51,721 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 227 selfloop transitions, 189 changer transitions 0/423 dead transitions. [2024-06-20 15:16:51,721 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 423 transitions, 6592 flow [2024-06-20 15:16:51,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:16:51,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:16:51,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 209 transitions. [2024-06-20 15:16:51,721 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.653125 [2024-06-20 15:16:51,721 INFO L175 Difference]: Start difference. First operand has 284 places, 374 transitions, 4954 flow. Second operand 8 states and 209 transitions. [2024-06-20 15:16:51,721 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 423 transitions, 6592 flow [2024-06-20 15:16:52,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 423 transitions, 6394 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-20 15:16:52,718 INFO L231 Difference]: Finished difference. Result has 289 places, 379 transitions, 5331 flow [2024-06-20 15:16:52,718 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4756, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=374, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=185, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5331, PETRI_PLACES=289, PETRI_TRANSITIONS=379} [2024-06-20 15:16:52,718 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 248 predicate places. [2024-06-20 15:16:52,718 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 379 transitions, 5331 flow [2024-06-20 15:16:52,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-20 15:16:52,718 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:16:52,718 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:16:52,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-20 15:16:52,718 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:16:52,719 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:16:52,719 INFO L85 PathProgramCache]: Analyzing trace with hash -901581847, now seen corresponding path program 2 times [2024-06-20 15:16:52,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:16:52,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411792757] [2024-06-20 15:16:52,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:16:52,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:16:52,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:16:52,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:16:52,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:16:52,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411792757] [2024-06-20 15:16:52,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411792757] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:16:52,802 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:16:52,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:16:52,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407765938] [2024-06-20 15:16:52,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:16:52,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:16:52,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:16:52,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:16:52,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:16:52,835 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:16:52,835 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 379 transitions, 5331 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-20 15:16:52,835 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:16:52,835 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:16:52,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:16:53,623 INFO L124 PetriNetUnfolderBase]: 3180/5347 cut-off events. [2024-06-20 15:16:53,623 INFO L125 PetriNetUnfolderBase]: For 481903/481903 co-relation queries the response was YES. [2024-06-20 15:16:53,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37322 conditions, 5347 events. 3180/5347 cut-off events. For 481903/481903 co-relation queries the response was YES. Maximal size of possible extension queue 338. Compared 35295 event pairs, 890 based on Foata normal form. 42/5382 useless extension candidates. Maximal degree in co-relation 37189. Up to 4175 conditions per place. [2024-06-20 15:16:53,686 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 211 selfloop transitions, 185 changer transitions 3/406 dead transitions. [2024-06-20 15:16:53,686 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 406 transitions, 6421 flow [2024-06-20 15:16:53,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:16:53,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:16:53,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-20 15:16:53,687 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6125 [2024-06-20 15:16:53,687 INFO L175 Difference]: Start difference. First operand has 289 places, 379 transitions, 5331 flow. Second operand 8 states and 196 transitions. [2024-06-20 15:16:53,687 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 406 transitions, 6421 flow [2024-06-20 15:16:54,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 406 transitions, 6106 flow, removed 41 selfloop flow, removed 3 redundant places. [2024-06-20 15:16:54,756 INFO L231 Difference]: Finished difference. Result has 294 places, 380 transitions, 5459 flow [2024-06-20 15:16:54,756 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5020, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=379, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=183, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5459, PETRI_PLACES=294, PETRI_TRANSITIONS=380} [2024-06-20 15:16:54,757 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 253 predicate places. [2024-06-20 15:16:54,757 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 380 transitions, 5459 flow [2024-06-20 15:16:54,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-20 15:16:54,757 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:16:54,757 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:16:54,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-20 15:16:54,757 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:16:54,757 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:16:54,757 INFO L85 PathProgramCache]: Analyzing trace with hash -1244977199, now seen corresponding path program 3 times [2024-06-20 15:16:54,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:16:54,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333514894] [2024-06-20 15:16:54,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:16:54,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:16:54,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:16:54,834 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:16:54,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:16:54,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333514894] [2024-06-20 15:16:54,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333514894] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:16:54,835 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:16:54,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:16:54,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053660257] [2024-06-20 15:16:54,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:16:54,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:16:54,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:16:54,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:16:54,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:16:54,889 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:16:54,890 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 380 transitions, 5459 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-20 15:16:54,890 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:16:54,890 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:16:54,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:16:55,889 INFO L124 PetriNetUnfolderBase]: 3412/5741 cut-off events. [2024-06-20 15:16:55,889 INFO L125 PetriNetUnfolderBase]: For 530710/530710 co-relation queries the response was YES. [2024-06-20 15:16:55,939 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41114 conditions, 5741 events. 3412/5741 cut-off events. For 530710/530710 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 38499 event pairs, 899 based on Foata normal form. 36/5770 useless extension candidates. Maximal degree in co-relation 40979. Up to 4177 conditions per place. [2024-06-20 15:16:55,961 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 226 selfloop transitions, 183 changer transitions 0/416 dead transitions. [2024-06-20 15:16:55,962 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 416 transitions, 6819 flow [2024-06-20 15:16:55,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:16:55,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:16:55,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 201 transitions. [2024-06-20 15:16:55,962 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.628125 [2024-06-20 15:16:55,962 INFO L175 Difference]: Start difference. First operand has 294 places, 380 transitions, 5459 flow. Second operand 8 states and 201 transitions. [2024-06-20 15:16:55,962 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 416 transitions, 6819 flow [2024-06-20 15:16:56,973 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 416 transitions, 6399 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-20 15:16:56,978 INFO L231 Difference]: Finished difference. Result has 297 places, 384 transitions, 5573 flow [2024-06-20 15:16:56,978 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5039, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=380, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=180, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5573, PETRI_PLACES=297, PETRI_TRANSITIONS=384} [2024-06-20 15:16:56,979 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 256 predicate places. [2024-06-20 15:16:56,979 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 384 transitions, 5573 flow [2024-06-20 15:16:56,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-20 15:16:56,979 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:16:56,979 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:16:56,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-20 15:16:56,979 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:16:56,979 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:16:56,979 INFO L85 PathProgramCache]: Analyzing trace with hash -1960407975, now seen corresponding path program 4 times [2024-06-20 15:16:56,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:16:56,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967933201] [2024-06-20 15:16:56,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:16:56,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:16:56,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:16:57,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:16:57,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:16:57,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967933201] [2024-06-20 15:16:57,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967933201] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:16:57,097 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:16:57,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:16:57,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67149107] [2024-06-20 15:16:57,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:16:57,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:16:57,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:16:57,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:16:57,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:16:57,164 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:16:57,164 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 384 transitions, 5573 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-20 15:16:57,164 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:16:57,164 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:16:57,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:16:58,130 INFO L124 PetriNetUnfolderBase]: 3544/5972 cut-off events. [2024-06-20 15:16:58,130 INFO L125 PetriNetUnfolderBase]: For 565503/565503 co-relation queries the response was YES. [2024-06-20 15:16:58,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42385 conditions, 5972 events. 3544/5972 cut-off events. For 565503/565503 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 40510 event pairs, 992 based on Foata normal form. 42/6009 useless extension candidates. Maximal degree in co-relation 42248. Up to 5072 conditions per place. [2024-06-20 15:16:58,204 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 291 selfloop transitions, 108 changer transitions 3/409 dead transitions. [2024-06-20 15:16:58,205 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 409 transitions, 6525 flow [2024-06-20 15:16:58,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:16:58,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:16:58,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 230 transitions. [2024-06-20 15:16:58,205 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.575 [2024-06-20 15:16:58,205 INFO L175 Difference]: Start difference. First operand has 297 places, 384 transitions, 5573 flow. Second operand 10 states and 230 transitions. [2024-06-20 15:16:58,205 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 409 transitions, 6525 flow [2024-06-20 15:16:59,517 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 409 transitions, 6211 flow, removed 37 selfloop flow, removed 4 redundant places. [2024-06-20 15:16:59,522 INFO L231 Difference]: Finished difference. Result has 303 places, 385 transitions, 5546 flow [2024-06-20 15:16:59,522 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5259, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=384, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5546, PETRI_PLACES=303, PETRI_TRANSITIONS=385} [2024-06-20 15:16:59,522 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 262 predicate places. [2024-06-20 15:16:59,523 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 385 transitions, 5546 flow [2024-06-20 15:16:59,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-20 15:16:59,523 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:16:59,523 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:16:59,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-20 15:16:59,523 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:16:59,523 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:16:59,524 INFO L85 PathProgramCache]: Analyzing trace with hash -1965770355, now seen corresponding path program 5 times [2024-06-20 15:16:59,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:16:59,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827698675] [2024-06-20 15:16:59,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:16:59,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:16:59,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:16:59,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:16:59,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:16:59,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827698675] [2024-06-20 15:16:59,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827698675] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:16:59,609 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:16:59,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:16:59,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178035547] [2024-06-20 15:16:59,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:16:59,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:16:59,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:16:59,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:16:59,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:16:59,670 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:16:59,671 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 385 transitions, 5546 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-20 15:16:59,671 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:16:59,671 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:16:59,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:17:00,697 INFO L124 PetriNetUnfolderBase]: 3666/6198 cut-off events. [2024-06-20 15:17:00,697 INFO L125 PetriNetUnfolderBase]: For 578313/578313 co-relation queries the response was YES. [2024-06-20 15:17:00,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43351 conditions, 6198 events. 3666/6198 cut-off events. For 578313/578313 co-relation queries the response was YES. Maximal size of possible extension queue 381. Compared 42480 event pairs, 1060 based on Foata normal form. 42/6235 useless extension candidates. Maximal degree in co-relation 43212. Up to 5274 conditions per place. [2024-06-20 15:17:00,767 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 297 selfloop transitions, 101 changer transitions 3/408 dead transitions. [2024-06-20 15:17:00,767 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 408 transitions, 6496 flow [2024-06-20 15:17:00,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:17:00,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:17:00,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 190 transitions. [2024-06-20 15:17:00,767 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.59375 [2024-06-20 15:17:00,768 INFO L175 Difference]: Start difference. First operand has 303 places, 385 transitions, 5546 flow. Second operand 8 states and 190 transitions. [2024-06-20 15:17:00,768 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 408 transitions, 6496 flow [2024-06-20 15:17:02,133 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 408 transitions, 6222 flow, removed 31 selfloop flow, removed 8 redundant places. [2024-06-20 15:17:02,138 INFO L231 Difference]: Finished difference. Result has 303 places, 386 transitions, 5550 flow [2024-06-20 15:17:02,138 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5272, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=385, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5550, PETRI_PLACES=303, PETRI_TRANSITIONS=386} [2024-06-20 15:17:02,138 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 262 predicate places. [2024-06-20 15:17:02,138 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 386 transitions, 5550 flow [2024-06-20 15:17:02,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-20 15:17:02,139 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:17:02,139 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:17:02,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-20 15:17:02,139 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:17:02,139 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:17:02,139 INFO L85 PathProgramCache]: Analyzing trace with hash -1965918225, now seen corresponding path program 6 times [2024-06-20 15:17:02,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:17:02,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135595147] [2024-06-20 15:17:02,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:17:02,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:17:02,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:17:02,229 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:17:02,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:17:02,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135595147] [2024-06-20 15:17:02,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135595147] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:17:02,230 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:17:02,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:17:02,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252708162] [2024-06-20 15:17:02,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:17:02,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:17:02,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:17:02,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:17:02,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:17:02,276 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:17:02,276 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 386 transitions, 5550 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-20 15:17:02,276 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:17:02,276 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:17:02,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:17:03,316 INFO L124 PetriNetUnfolderBase]: 3898/6592 cut-off events. [2024-06-20 15:17:03,316 INFO L125 PetriNetUnfolderBase]: For 636808/636808 co-relation queries the response was YES. [2024-06-20 15:17:03,376 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47226 conditions, 6592 events. 3898/6592 cut-off events. For 636808/636808 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 45752 event pairs, 1069 based on Foata normal form. 36/6623 useless extension candidates. Maximal degree in co-relation 47086. Up to 5072 conditions per place. [2024-06-20 15:17:03,399 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 311 selfloop transitions, 100 changer transitions 0/418 dead transitions. [2024-06-20 15:17:03,399 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 418 transitions, 6786 flow [2024-06-20 15:17:03,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:17:03,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:17:03,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 195 transitions. [2024-06-20 15:17:03,400 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.609375 [2024-06-20 15:17:03,400 INFO L175 Difference]: Start difference. First operand has 303 places, 386 transitions, 5550 flow. Second operand 8 states and 195 transitions. [2024-06-20 15:17:03,400 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 418 transitions, 6786 flow [2024-06-20 15:17:04,908 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 418 transitions, 6522 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-20 15:17:04,914 INFO L231 Difference]: Finished difference. Result has 306 places, 390 transitions, 5678 flow [2024-06-20 15:17:04,914 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5286, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=386, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=287, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5678, PETRI_PLACES=306, PETRI_TRANSITIONS=390} [2024-06-20 15:17:04,914 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 265 predicate places. [2024-06-20 15:17:04,914 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 390 transitions, 5678 flow [2024-06-20 15:17:04,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-20 15:17:04,914 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:17:04,915 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:17:04,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-20 15:17:04,915 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:17:04,915 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:17:04,915 INFO L85 PathProgramCache]: Analyzing trace with hash -1960192773, now seen corresponding path program 1 times [2024-06-20 15:17:04,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:17:04,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894141523] [2024-06-20 15:17:04,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:17:04,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:17:04,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:17:04,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:17:04,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:17:04,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894141523] [2024-06-20 15:17:04,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894141523] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:17:04,998 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:17:04,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:17:04,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932579878] [2024-06-20 15:17:04,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:17:04,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:17:04,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:17:04,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:17:04,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:17:05,042 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:17:05,043 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 390 transitions, 5678 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-20 15:17:05,043 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:17:05,043 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:17:05,043 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:17:06,142 INFO L124 PetriNetUnfolderBase]: 4006/6794 cut-off events. [2024-06-20 15:17:06,142 INFO L125 PetriNetUnfolderBase]: For 656547/656547 co-relation queries the response was YES. [2024-06-20 15:17:06,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48230 conditions, 6794 events. 4006/6794 cut-off events. For 656547/656547 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 47606 event pairs, 1142 based on Foata normal form. 36/6825 useless extension candidates. Maximal degree in co-relation 48088. Up to 5444 conditions per place. [2024-06-20 15:17:06,222 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 295 selfloop transitions, 113 changer transitions 6/421 dead transitions. [2024-06-20 15:17:06,222 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 421 transitions, 6692 flow [2024-06-20 15:17:06,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:17:06,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:17:06,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 233 transitions. [2024-06-20 15:17:06,223 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5825 [2024-06-20 15:17:06,223 INFO L175 Difference]: Start difference. First operand has 306 places, 390 transitions, 5678 flow. Second operand 10 states and 233 transitions. [2024-06-20 15:17:06,223 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 421 transitions, 6692 flow [2024-06-20 15:17:08,070 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 421 transitions, 6477 flow, removed 45 selfloop flow, removed 4 redundant places. [2024-06-20 15:17:08,075 INFO L231 Difference]: Finished difference. Result has 312 places, 391 transitions, 5759 flow [2024-06-20 15:17:08,075 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5463, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=390, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5759, PETRI_PLACES=312, PETRI_TRANSITIONS=391} [2024-06-20 15:17:08,075 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 271 predicate places. [2024-06-20 15:17:08,075 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 391 transitions, 5759 flow [2024-06-20 15:17:08,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-20 15:17:08,075 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:17:08,075 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:17:08,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-20 15:17:08,076 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:17:08,076 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:17:08,076 INFO L85 PathProgramCache]: Analyzing trace with hash 524512861, now seen corresponding path program 7 times [2024-06-20 15:17:08,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:17:08,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746313615] [2024-06-20 15:17:08,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:17:08,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:17:08,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:17:08,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:17:08,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:17:08,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746313615] [2024-06-20 15:17:08,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746313615] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:17:08,169 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:17:08,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:17:08,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617928541] [2024-06-20 15:17:08,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:17:08,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:17:08,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:17:08,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:17:08,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:17:08,198 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:17:08,198 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 391 transitions, 5759 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-20 15:17:08,198 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:17:08,198 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:17:08,198 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:17:09,321 INFO L124 PetriNetUnfolderBase]: 4108/6973 cut-off events. [2024-06-20 15:17:09,321 INFO L125 PetriNetUnfolderBase]: For 692252/692255 co-relation queries the response was YES. [2024-06-20 15:17:09,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49176 conditions, 6973 events. 4108/6973 cut-off events. For 692252/692255 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 49233 event pairs, 1267 based on Foata normal form. 44/7009 useless extension candidates. Maximal degree in co-relation 49032. Up to 5786 conditions per place. [2024-06-20 15:17:09,409 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 246 selfloop transitions, 160 changer transitions 3/416 dead transitions. [2024-06-20 15:17:09,409 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 416 transitions, 6893 flow [2024-06-20 15:17:09,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:17:09,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:17:09,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 210 transitions. [2024-06-20 15:17:09,410 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-06-20 15:17:09,410 INFO L175 Difference]: Start difference. First operand has 312 places, 391 transitions, 5759 flow. Second operand 9 states and 210 transitions. [2024-06-20 15:17:09,410 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 416 transitions, 6893 flow [2024-06-20 15:17:11,224 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 416 transitions, 6596 flow, removed 37 selfloop flow, removed 8 redundant places. [2024-06-20 15:17:11,229 INFO L231 Difference]: Finished difference. Result has 313 places, 392 transitions, 5872 flow [2024-06-20 15:17:11,229 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5462, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=391, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=158, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5872, PETRI_PLACES=313, PETRI_TRANSITIONS=392} [2024-06-20 15:17:11,230 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 272 predicate places. [2024-06-20 15:17:11,230 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 392 transitions, 5872 flow [2024-06-20 15:17:11,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-20 15:17:11,230 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:17:11,230 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:17:11,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-20 15:17:11,230 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:17:11,230 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:17:11,230 INFO L85 PathProgramCache]: Analyzing trace with hash 325211071, now seen corresponding path program 8 times [2024-06-20 15:17:11,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:17:11,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112836416] [2024-06-20 15:17:11,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:17:11,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:17:11,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:17:11,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:17:11,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:17:11,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112836416] [2024-06-20 15:17:11,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112836416] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:17:11,318 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:17:11,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:17:11,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076289842] [2024-06-20 15:17:11,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:17:11,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:17:11,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:17:11,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:17:11,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:17:11,355 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:17:11,355 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 392 transitions, 5872 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-20 15:17:11,355 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:17:11,355 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:17:11,355 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:17:12,527 INFO L124 PetriNetUnfolderBase]: 4230/7164 cut-off events. [2024-06-20 15:17:12,527 INFO L125 PetriNetUnfolderBase]: For 713135/713135 co-relation queries the response was YES. [2024-06-20 15:17:12,596 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50426 conditions, 7164 events. 4230/7164 cut-off events. For 713135/713135 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 50680 event pairs, 1288 based on Foata normal form. 42/7201 useless extension candidates. Maximal degree in co-relation 50281. Up to 5804 conditions per place. [2024-06-20 15:17:12,620 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 244 selfloop transitions, 168 changer transitions 3/422 dead transitions. [2024-06-20 15:17:12,621 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 422 transitions, 7038 flow [2024-06-20 15:17:12,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:17:12,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:17:12,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-20 15:17:12,621 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.615625 [2024-06-20 15:17:12,621 INFO L175 Difference]: Start difference. First operand has 313 places, 392 transitions, 5872 flow. Second operand 8 states and 197 transitions. [2024-06-20 15:17:12,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 422 transitions, 7038 flow [2024-06-20 15:17:14,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 422 transitions, 6646 flow, removed 38 selfloop flow, removed 7 redundant places. [2024-06-20 15:17:14,386 INFO L231 Difference]: Finished difference. Result has 314 places, 393 transitions, 5911 flow [2024-06-20 15:17:14,386 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5480, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=392, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=166, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5911, PETRI_PLACES=314, PETRI_TRANSITIONS=393} [2024-06-20 15:17:14,386 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 273 predicate places. [2024-06-20 15:17:14,386 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 393 transitions, 5911 flow [2024-06-20 15:17:14,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-20 15:17:14,386 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:17:14,387 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:17:14,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-20 15:17:14,387 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:17:14,387 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:17:14,387 INFO L85 PathProgramCache]: Analyzing trace with hash 330573451, now seen corresponding path program 9 times [2024-06-20 15:17:14,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:17:14,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064929223] [2024-06-20 15:17:14,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:17:14,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:17:14,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:17:14,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:17:14,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:17:14,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064929223] [2024-06-20 15:17:14,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064929223] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:17:14,474 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:17:14,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:17:14,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141554296] [2024-06-20 15:17:14,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:17:14,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:17:14,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:17:14,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:17:14,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:17:14,516 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:17:14,516 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 393 transitions, 5911 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-20 15:17:14,516 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:17:14,516 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:17:14,516 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:17:15,703 INFO L124 PetriNetUnfolderBase]: 4339/7371 cut-off events. [2024-06-20 15:17:15,703 INFO L125 PetriNetUnfolderBase]: For 721747/721747 co-relation queries the response was YES. [2024-06-20 15:17:15,776 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51215 conditions, 7371 events. 4339/7371 cut-off events. For 721747/721747 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 52629 event pairs, 1357 based on Foata normal form. 42/7408 useless extension candidates. Maximal degree in co-relation 51069. Up to 5987 conditions per place. [2024-06-20 15:17:15,801 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 236 selfloop transitions, 179 changer transitions 3/425 dead transitions. [2024-06-20 15:17:15,801 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 425 transitions, 7093 flow [2024-06-20 15:17:15,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:17:15,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:17:15,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 236 transitions. [2024-06-20 15:17:15,804 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.59 [2024-06-20 15:17:15,804 INFO L175 Difference]: Start difference. First operand has 314 places, 393 transitions, 5911 flow. Second operand 10 states and 236 transitions. [2024-06-20 15:17:15,804 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 425 transitions, 7093 flow [2024-06-20 15:17:18,042 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 425 transitions, 6691 flow, removed 37 selfloop flow, removed 6 redundant places. [2024-06-20 15:17:18,048 INFO L231 Difference]: Finished difference. Result has 318 places, 394 transitions, 5966 flow [2024-06-20 15:17:18,048 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5509, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=393, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=177, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5966, PETRI_PLACES=318, PETRI_TRANSITIONS=394} [2024-06-20 15:17:18,048 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 277 predicate places. [2024-06-20 15:17:18,049 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 394 transitions, 5966 flow [2024-06-20 15:17:18,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-20 15:17:18,049 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:17:18,049 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:17:18,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-20 15:17:18,049 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:17:18,049 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:17:18,049 INFO L85 PathProgramCache]: Analyzing trace with hash -1967767855, now seen corresponding path program 10 times [2024-06-20 15:17:18,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:17:18,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309088586] [2024-06-20 15:17:18,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:17:18,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:17:18,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:17:18,145 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:17:18,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:17:18,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309088586] [2024-06-20 15:17:18,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309088586] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:17:18,145 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:17:18,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:17:18,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019673582] [2024-06-20 15:17:18,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:17:18,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:17:18,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:17:18,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:17:18,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:17:18,182 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:17:18,182 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 394 transitions, 5966 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-20 15:17:18,182 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:17:18,182 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:17:18,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:17:19,403 INFO L124 PetriNetUnfolderBase]: 4433/7563 cut-off events. [2024-06-20 15:17:19,404 INFO L125 PetriNetUnfolderBase]: For 699638/699638 co-relation queries the response was YES. [2024-06-20 15:17:19,475 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51358 conditions, 7563 events. 4433/7563 cut-off events. For 699638/699638 co-relation queries the response was YES. Maximal size of possible extension queue 494. Compared 54472 event pairs, 1095 based on Foata normal form. 36/7594 useless extension candidates. Maximal degree in co-relation 51211. Up to 4369 conditions per place. [2024-06-20 15:17:19,500 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 253 selfloop transitions, 175 changer transitions 0/435 dead transitions. [2024-06-20 15:17:19,500 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 435 transitions, 7406 flow [2024-06-20 15:17:19,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:17:19,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:17:19,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 206 transitions. [2024-06-20 15:17:19,500 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.64375 [2024-06-20 15:17:19,501 INFO L175 Difference]: Start difference. First operand has 318 places, 394 transitions, 5966 flow. Second operand 8 states and 206 transitions. [2024-06-20 15:17:19,501 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 435 transitions, 7406 flow [2024-06-20 15:17:21,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 435 transitions, 6978 flow, removed 39 selfloop flow, removed 8 redundant places. [2024-06-20 15:17:21,439 INFO L231 Difference]: Finished difference. Result has 319 places, 397 transitions, 6093 flow [2024-06-20 15:17:21,439 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5538, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=394, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=172, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6093, PETRI_PLACES=319, PETRI_TRANSITIONS=397} [2024-06-20 15:17:21,439 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 278 predicate places. [2024-06-20 15:17:21,439 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 397 transitions, 6093 flow [2024-06-20 15:17:21,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-20 15:17:21,440 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:17:21,440 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:17:21,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-20 15:17:21,440 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:17:21,440 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:17:21,440 INFO L85 PathProgramCache]: Analyzing trace with hash 330788653, now seen corresponding path program 2 times [2024-06-20 15:17:21,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:17:21,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663179288] [2024-06-20 15:17:21,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:17:21,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:17:21,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:17:21,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:17:21,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:17:21,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663179288] [2024-06-20 15:17:21,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663179288] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:17:21,522 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:17:21,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:17:21,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896674338] [2024-06-20 15:17:21,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:17:21,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:17:21,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:17:21,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:17:21,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:17:21,563 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:17:21,578 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 397 transitions, 6093 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-20 15:17:21,578 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:17:21,578 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:17:21,578 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:17:22,861 INFO L124 PetriNetUnfolderBase]: 4541/7765 cut-off events. [2024-06-20 15:17:22,861 INFO L125 PetriNetUnfolderBase]: For 717728/717728 co-relation queries the response was YES. [2024-06-20 15:17:22,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52616 conditions, 7765 events. 4541/7765 cut-off events. For 717728/717728 co-relation queries the response was YES. Maximal size of possible extension queue 513. Compared 56181 event pairs, 1359 based on Foata normal form. 36/7796 useless extension candidates. Maximal degree in co-relation 52467. Up to 5585 conditions per place. [2024-06-20 15:17:22,959 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 230 selfloop transitions, 192 changer transitions 6/435 dead transitions. [2024-06-20 15:17:22,959 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 435 transitions, 7327 flow [2024-06-20 15:17:22,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:17:22,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:17:22,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 240 transitions. [2024-06-20 15:17:22,960 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-20 15:17:22,960 INFO L175 Difference]: Start difference. First operand has 319 places, 397 transitions, 6093 flow. Second operand 10 states and 240 transitions. [2024-06-20 15:17:22,960 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 435 transitions, 7327 flow [2024-06-20 15:17:25,141 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 435 transitions, 6761 flow, removed 57 selfloop flow, removed 7 redundant places. [2024-06-20 15:17:25,146 INFO L231 Difference]: Finished difference. Result has 322 places, 398 transitions, 6002 flow [2024-06-20 15:17:25,147 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5531, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=397, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=190, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6002, PETRI_PLACES=322, PETRI_TRANSITIONS=398} [2024-06-20 15:17:25,147 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 281 predicate places. [2024-06-20 15:17:25,147 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 398 transitions, 6002 flow [2024-06-20 15:17:25,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-20 15:17:25,147 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:17:25,148 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:17:25,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-20 15:17:25,148 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:17:25,148 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:17:25,148 INFO L85 PathProgramCache]: Analyzing trace with hash 1064426461, now seen corresponding path program 3 times [2024-06-20 15:17:25,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:17:25,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777497600] [2024-06-20 15:17:25,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:17:25,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:17:25,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:17:25,231 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:17:25,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:17:25,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777497600] [2024-06-20 15:17:25,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777497600] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:17:25,231 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:17:25,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:17:25,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393742619] [2024-06-20 15:17:25,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:17:25,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:17:25,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:17:25,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:17:25,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:17:25,283 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:17:25,283 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 398 transitions, 6002 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-20 15:17:25,283 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:17:25,283 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:17:25,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:17:26,573 INFO L124 PetriNetUnfolderBase]: 4619/7932 cut-off events. [2024-06-20 15:17:26,573 INFO L125 PetriNetUnfolderBase]: For 712822/712825 co-relation queries the response was YES. [2024-06-20 15:17:26,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52199 conditions, 7932 events. 4619/7932 cut-off events. For 712822/712825 co-relation queries the response was YES. Maximal size of possible extension queue 526. Compared 58129 event pairs, 1486 based on Foata normal form. 38/7962 useless extension candidates. Maximal degree in co-relation 52050. Up to 6449 conditions per place. [2024-06-20 15:17:26,675 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 256 selfloop transitions, 158 changer transitions 9/430 dead transitions. [2024-06-20 15:17:26,675 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 430 transitions, 7212 flow [2024-06-20 15:17:26,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:17:26,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:17:26,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 233 transitions. [2024-06-20 15:17:26,676 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5825 [2024-06-20 15:17:26,676 INFO L175 Difference]: Start difference. First operand has 322 places, 398 transitions, 6002 flow. Second operand 10 states and 233 transitions. [2024-06-20 15:17:26,676 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 430 transitions, 7212 flow [2024-06-20 15:17:28,961 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 430 transitions, 6742 flow, removed 46 selfloop flow, removed 8 redundant places. [2024-06-20 15:17:28,966 INFO L231 Difference]: Finished difference. Result has 324 places, 396 transitions, 5911 flow [2024-06-20 15:17:28,966 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5538, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=398, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=156, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5911, PETRI_PLACES=324, PETRI_TRANSITIONS=396} [2024-06-20 15:17:28,967 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 283 predicate places. [2024-06-20 15:17:28,967 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 396 transitions, 5911 flow [2024-06-20 15:17:28,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-20 15:17:28,967 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:17:28,967 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:17:28,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-20 15:17:28,967 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:17:28,967 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:17:28,967 INFO L85 PathProgramCache]: Analyzing trace with hash 1073623231, now seen corresponding path program 4 times [2024-06-20 15:17:28,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:17:28,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134211413] [2024-06-20 15:17:28,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:17:28,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:17:28,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:17:29,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:17:29,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:17:29,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134211413] [2024-06-20 15:17:29,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134211413] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:17:29,048 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:17:29,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:17:29,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673210780] [2024-06-20 15:17:29,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:17:29,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:17:29,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:17:29,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:17:29,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:17:29,101 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:17:29,102 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 396 transitions, 5911 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-20 15:17:29,102 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:17:29,102 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:17:29,102 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:17:30,392 INFO L124 PetriNetUnfolderBase]: 4643/7962 cut-off events. [2024-06-20 15:17:30,392 INFO L125 PetriNetUnfolderBase]: For 773901/773904 co-relation queries the response was YES. [2024-06-20 15:17:30,475 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53270 conditions, 7962 events. 4643/7962 cut-off events. For 773901/773904 co-relation queries the response was YES. Maximal size of possible extension queue 521. Compared 57924 event pairs, 1469 based on Foata normal form. 38/7992 useless extension candidates. Maximal degree in co-relation 53120. Up to 4741 conditions per place. [2024-06-20 15:17:30,501 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 246 selfloop transitions, 166 changer transitions 12/431 dead transitions. [2024-06-20 15:17:30,501 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 431 transitions, 7255 flow [2024-06-20 15:17:30,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:17:30,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:17:30,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 218 transitions. [2024-06-20 15:17:30,502 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6055555555555555 [2024-06-20 15:17:30,502 INFO L175 Difference]: Start difference. First operand has 324 places, 396 transitions, 5911 flow. Second operand 9 states and 218 transitions. [2024-06-20 15:17:30,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 431 transitions, 7255 flow [2024-06-20 15:17:33,063 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 431 transitions, 6854 flow, removed 44 selfloop flow, removed 8 redundant places. [2024-06-20 15:17:33,067 INFO L231 Difference]: Finished difference. Result has 325 places, 391 transitions, 5839 flow [2024-06-20 15:17:33,068 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5510, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=396, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=165, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5839, PETRI_PLACES=325, PETRI_TRANSITIONS=391} [2024-06-20 15:17:33,068 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 284 predicate places. [2024-06-20 15:17:33,068 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 391 transitions, 5839 flow [2024-06-20 15:17:33,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-20 15:17:33,068 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:17:33,068 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:17:33,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-20 15:17:33,068 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:17:33,068 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:17:33,068 INFO L85 PathProgramCache]: Analyzing trace with hash -666984972, now seen corresponding path program 1 times [2024-06-20 15:17:33,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:17:33,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827118939] [2024-06-20 15:17:33,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:17:33,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:17:33,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:17:33,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:17:33,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:17:33,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827118939] [2024-06-20 15:17:33,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827118939] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:17:33,162 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:17:33,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:17:33,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290487155] [2024-06-20 15:17:33,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:17:33,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:17:33,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:17:33,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:17:33,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:17:33,203 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:17:33,203 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 391 transitions, 5839 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-20 15:17:33,203 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:17:33,203 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:17:33,203 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:17:34,448 INFO L124 PetriNetUnfolderBase]: 4511/7646 cut-off events. [2024-06-20 15:17:34,448 INFO L125 PetriNetUnfolderBase]: For 727488/727488 co-relation queries the response was YES. [2024-06-20 15:17:34,520 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53665 conditions, 7646 events. 4511/7646 cut-off events. For 727488/727488 co-relation queries the response was YES. Maximal size of possible extension queue 503. Compared 55260 event pairs, 1335 based on Foata normal form. 10/7581 useless extension candidates. Maximal degree in co-relation 53514. Up to 6017 conditions per place. [2024-06-20 15:17:34,544 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 238 selfloop transitions, 189 changer transitions 4/438 dead transitions. [2024-06-20 15:17:34,544 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 438 transitions, 7414 flow [2024-06-20 15:17:34,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:17:34,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:17:34,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 208 transitions. [2024-06-20 15:17:34,544 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.65 [2024-06-20 15:17:34,545 INFO L175 Difference]: Start difference. First operand has 325 places, 391 transitions, 5839 flow. Second operand 8 states and 208 transitions. [2024-06-20 15:17:34,545 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 438 transitions, 7414 flow [2024-06-20 15:17:36,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 438 transitions, 6905 flow, removed 46 selfloop flow, removed 8 redundant places. [2024-06-20 15:17:36,690 INFO L231 Difference]: Finished difference. Result has 326 places, 398 transitions, 5986 flow [2024-06-20 15:17:36,690 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5330, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=391, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=181, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5986, PETRI_PLACES=326, PETRI_TRANSITIONS=398} [2024-06-20 15:17:36,690 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 285 predicate places. [2024-06-20 15:17:36,690 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 398 transitions, 5986 flow [2024-06-20 15:17:36,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-20 15:17:36,690 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:17:36,690 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:17:36,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-20 15:17:36,691 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:17:36,691 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:17:36,691 INFO L85 PathProgramCache]: Analyzing trace with hash -274175850, now seen corresponding path program 2 times [2024-06-20 15:17:36,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:17:36,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369585726] [2024-06-20 15:17:36,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:17:36,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:17:36,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:17:36,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:17:36,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:17:36,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369585726] [2024-06-20 15:17:36,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369585726] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:17:36,785 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:17:36,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:17:36,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823184896] [2024-06-20 15:17:36,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:17:36,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:17:36,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:17:36,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:17:36,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:17:36,817 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:17:36,817 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 398 transitions, 5986 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-20 15:17:36,817 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:17:36,817 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:17:36,817 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:17:38,007 INFO L124 PetriNetUnfolderBase]: 4289/7315 cut-off events. [2024-06-20 15:17:38,007 INFO L125 PetriNetUnfolderBase]: For 615458/615458 co-relation queries the response was YES. [2024-06-20 15:17:38,086 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49009 conditions, 7315 events. 4289/7315 cut-off events. For 615458/615458 co-relation queries the response was YES. Maximal size of possible extension queue 478. Compared 52449 event pairs, 1348 based on Foata normal form. 10/7299 useless extension candidates. Maximal degree in co-relation 48857. Up to 6225 conditions per place. [2024-06-20 15:17:38,109 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 235 selfloop transitions, 181 changer transitions 4/427 dead transitions. [2024-06-20 15:17:38,109 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 427 transitions, 7076 flow [2024-06-20 15:17:38,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:17:38,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:17:38,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-06-20 15:17:38,110 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.621875 [2024-06-20 15:17:38,110 INFO L175 Difference]: Start difference. First operand has 326 places, 398 transitions, 5986 flow. Second operand 8 states and 199 transitions. [2024-06-20 15:17:38,110 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 427 transitions, 7076 flow [2024-06-20 15:17:40,461 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 427 transitions, 6651 flow, removed 34 selfloop flow, removed 5 redundant places. [2024-06-20 15:17:40,466 INFO L231 Difference]: Finished difference. Result has 329 places, 397 transitions, 5922 flow [2024-06-20 15:17:40,466 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5567, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=398, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=181, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5922, PETRI_PLACES=329, PETRI_TRANSITIONS=397} [2024-06-20 15:17:40,467 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 288 predicate places. [2024-06-20 15:17:40,467 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 397 transitions, 5922 flow [2024-06-20 15:17:40,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-20 15:17:40,467 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:17:40,467 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:17:40,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-20 15:17:40,467 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:17:40,467 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:17:40,467 INFO L85 PathProgramCache]: Analyzing trace with hash -158884680, now seen corresponding path program 3 times [2024-06-20 15:17:40,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:17:40,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823874716] [2024-06-20 15:17:40,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:17:40,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:17:40,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:17:40,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:17:40,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:17:40,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823874716] [2024-06-20 15:17:40,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823874716] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:17:40,557 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:17:40,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:17:40,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216753131] [2024-06-20 15:17:40,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:17:40,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:17:40,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:17:40,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:17:40,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:17:40,594 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:17:40,594 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 397 transitions, 5922 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-20 15:17:40,594 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:17:40,594 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:17:40,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:17:41,798 INFO L124 PetriNetUnfolderBase]: 4214/7186 cut-off events. [2024-06-20 15:17:41,798 INFO L125 PetriNetUnfolderBase]: For 553634/553637 co-relation queries the response was YES. [2024-06-20 15:17:41,872 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46940 conditions, 7186 events. 4214/7186 cut-off events. For 553634/553637 co-relation queries the response was YES. Maximal size of possible extension queue 466. Compared 51317 event pairs, 1286 based on Foata normal form. 12/7181 useless extension candidates. Maximal degree in co-relation 46787. Up to 6438 conditions per place. [2024-06-20 15:17:41,894 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 329 selfloop transitions, 82 changer transitions 4/422 dead transitions. [2024-06-20 15:17:41,894 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 422 transitions, 6826 flow [2024-06-20 15:17:41,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:17:41,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:17:41,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-20 15:17:41,895 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.596875 [2024-06-20 15:17:41,895 INFO L175 Difference]: Start difference. First operand has 329 places, 397 transitions, 5922 flow. Second operand 8 states and 191 transitions. [2024-06-20 15:17:41,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 422 transitions, 6826 flow [2024-06-20 15:17:44,502 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 422 transitions, 6419 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-20 15:17:44,507 INFO L231 Difference]: Finished difference. Result has 331 places, 396 transitions, 5667 flow [2024-06-20 15:17:44,507 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5515, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=397, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=315, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5667, PETRI_PLACES=331, PETRI_TRANSITIONS=396} [2024-06-20 15:17:44,508 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 290 predicate places. [2024-06-20 15:17:44,508 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 396 transitions, 5667 flow [2024-06-20 15:17:44,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-20 15:17:44,508 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:17:44,508 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:17:44,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-20 15:17:44,508 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:17:44,509 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:17:44,509 INFO L85 PathProgramCache]: Analyzing trace with hash -283436883, now seen corresponding path program 1 times [2024-06-20 15:17:44,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:17:44,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908343624] [2024-06-20 15:17:44,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:17:44,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:17:44,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:17:44,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:17:44,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:17:44,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908343624] [2024-06-20 15:17:44,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908343624] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:17:44,575 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:17:44,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:17:44,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998478288] [2024-06-20 15:17:44,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:17:44,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:17:44,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:17:44,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:17:44,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:17:44,597 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:17:44,598 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 396 transitions, 5667 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:17:44,598 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:17:44,598 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:17:44,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:17:45,792 INFO L124 PetriNetUnfolderBase]: 4205/7196 cut-off events. [2024-06-20 15:17:45,792 INFO L125 PetriNetUnfolderBase]: For 542570/542573 co-relation queries the response was YES. [2024-06-20 15:17:45,857 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46689 conditions, 7196 events. 4205/7196 cut-off events. For 542570/542573 co-relation queries the response was YES. Maximal size of possible extension queue 460. Compared 51556 event pairs, 1342 based on Foata normal form. 3/7191 useless extension candidates. Maximal degree in co-relation 46535. Up to 6116 conditions per place. [2024-06-20 15:17:45,876 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 259 selfloop transitions, 158 changer transitions 0/424 dead transitions. [2024-06-20 15:17:45,876 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 424 transitions, 6960 flow [2024-06-20 15:17:45,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:17:45,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:17:45,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2024-06-20 15:17:45,877 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5928571428571429 [2024-06-20 15:17:45,877 INFO L175 Difference]: Start difference. First operand has 331 places, 396 transitions, 5667 flow. Second operand 7 states and 166 transitions. [2024-06-20 15:17:45,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 424 transitions, 6960 flow [2024-06-20 15:17:48,315 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 424 transitions, 6747 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-20 15:17:48,320 INFO L231 Difference]: Finished difference. Result has 332 places, 405 transitions, 5862 flow [2024-06-20 15:17:48,320 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5454, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=396, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=149, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5862, PETRI_PLACES=332, PETRI_TRANSITIONS=405} [2024-06-20 15:17:48,321 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 291 predicate places. [2024-06-20 15:17:48,321 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 405 transitions, 5862 flow [2024-06-20 15:17:48,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:17:48,321 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:17:48,321 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:17:48,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-20 15:17:48,321 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:17:48,321 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:17:48,321 INFO L85 PathProgramCache]: Analyzing trace with hash -839622825, now seen corresponding path program 2 times [2024-06-20 15:17:48,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:17:48,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245689081] [2024-06-20 15:17:48,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:17:48,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:17:48,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:17:48,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:17:48,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:17:48,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245689081] [2024-06-20 15:17:48,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245689081] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:17:48,402 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:17:48,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:17:48,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226551795] [2024-06-20 15:17:48,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:17:48,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:17:48,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:17:48,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:17:48,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:17:48,433 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:17:48,434 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 405 transitions, 5862 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:17:48,434 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:17:48,434 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:17:48,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:17:49,566 INFO L124 PetriNetUnfolderBase]: 4202/7194 cut-off events. [2024-06-20 15:17:49,566 INFO L125 PetriNetUnfolderBase]: For 549025/549030 co-relation queries the response was YES. [2024-06-20 15:17:49,643 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46798 conditions, 7194 events. 4202/7194 cut-off events. For 549025/549030 co-relation queries the response was YES. Maximal size of possible extension queue 460. Compared 51573 event pairs, 1388 based on Foata normal form. 5/7191 useless extension candidates. Maximal degree in co-relation 46643. Up to 6113 conditions per place. [2024-06-20 15:17:49,665 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 260 selfloop transitions, 160 changer transitions 0/427 dead transitions. [2024-06-20 15:17:49,665 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 427 transitions, 7088 flow [2024-06-20 15:17:49,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:17:49,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:17:49,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-20 15:17:49,666 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6071428571428571 [2024-06-20 15:17:49,666 INFO L175 Difference]: Start difference. First operand has 332 places, 405 transitions, 5862 flow. Second operand 7 states and 170 transitions. [2024-06-20 15:17:49,666 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 427 transitions, 7088 flow [2024-06-20 15:17:51,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 427 transitions, 6917 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-20 15:17:51,953 INFO L231 Difference]: Finished difference. Result has 336 places, 405 transitions, 6017 flow [2024-06-20 15:17:51,953 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5691, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=405, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=160, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6017, PETRI_PLACES=336, PETRI_TRANSITIONS=405} [2024-06-20 15:17:51,953 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 295 predicate places. [2024-06-20 15:17:51,953 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 405 transitions, 6017 flow [2024-06-20 15:17:51,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:17:51,954 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:17:51,954 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:17:51,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-20 15:17:51,954 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:17:51,954 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:17:51,954 INFO L85 PathProgramCache]: Analyzing trace with hash -664123455, now seen corresponding path program 3 times [2024-06-20 15:17:51,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:17:51,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795564207] [2024-06-20 15:17:51,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:17:51,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:17:51,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:17:52,031 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:17:52,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:17:52,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795564207] [2024-06-20 15:17:52,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795564207] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:17:52,031 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:17:52,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:17:52,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850192915] [2024-06-20 15:17:52,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:17:52,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:17:52,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:17:52,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:17:52,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:17:52,058 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:17:52,058 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 405 transitions, 6017 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:17:52,058 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:17:52,058 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:17:52,058 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:17:53,146 INFO L124 PetriNetUnfolderBase]: 4207/7201 cut-off events. [2024-06-20 15:17:53,146 INFO L125 PetriNetUnfolderBase]: For 563229/563232 co-relation queries the response was YES. [2024-06-20 15:17:53,218 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47116 conditions, 7201 events. 4207/7201 cut-off events. For 563229/563232 co-relation queries the response was YES. Maximal size of possible extension queue 460. Compared 51627 event pairs, 1345 based on Foata normal form. 3/7196 useless extension candidates. Maximal degree in co-relation 46960. Up to 6119 conditions per place. [2024-06-20 15:17:53,239 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 261 selfloop transitions, 156 changer transitions 0/424 dead transitions. [2024-06-20 15:17:53,239 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 424 transitions, 7260 flow [2024-06-20 15:17:53,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:17:53,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:17:53,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2024-06-20 15:17:53,240 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5928571428571429 [2024-06-20 15:17:53,240 INFO L175 Difference]: Start difference. First operand has 336 places, 405 transitions, 6017 flow. Second operand 7 states and 166 transitions. [2024-06-20 15:17:53,240 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 424 transitions, 7260 flow [2024-06-20 15:17:56,226 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 424 transitions, 6748 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-20 15:17:56,231 INFO L231 Difference]: Finished difference. Result has 337 places, 408 transitions, 5858 flow [2024-06-20 15:17:56,231 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5514, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=405, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5858, PETRI_PLACES=337, PETRI_TRANSITIONS=408} [2024-06-20 15:17:56,231 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 296 predicate places. [2024-06-20 15:17:56,232 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 408 transitions, 5858 flow [2024-06-20 15:17:56,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:17:56,232 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:17:56,232 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:17:56,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-20 15:17:56,232 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:17:56,232 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:17:56,232 INFO L85 PathProgramCache]: Analyzing trace with hash -664134615, now seen corresponding path program 4 times [2024-06-20 15:17:56,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:17:56,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016435055] [2024-06-20 15:17:56,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:17:56,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:17:56,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:17:56,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:17:56,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:17:56,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016435055] [2024-06-20 15:17:56,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016435055] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:17:56,300 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:17:56,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:17:56,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950754228] [2024-06-20 15:17:56,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:17:56,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:17:56,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:17:56,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:17:56,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:17:56,327 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:17:56,327 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 408 transitions, 5858 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:17:56,327 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:17:56,327 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:17:56,327 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:17:57,578 INFO L124 PetriNetUnfolderBase]: 4204/7197 cut-off events. [2024-06-20 15:17:57,578 INFO L125 PetriNetUnfolderBase]: For 567776/567779 co-relation queries the response was YES. [2024-06-20 15:17:57,638 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46977 conditions, 7197 events. 4204/7197 cut-off events. For 567776/567779 co-relation queries the response was YES. Maximal size of possible extension queue 460. Compared 51599 event pairs, 1355 based on Foata normal form. 3/7192 useless extension candidates. Maximal degree in co-relation 46821. Up to 6116 conditions per place. [2024-06-20 15:17:57,655 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 265 selfloop transitions, 151 changer transitions 0/423 dead transitions. [2024-06-20 15:17:57,655 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 423 transitions, 6896 flow [2024-06-20 15:17:57,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:17:57,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:17:57,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 164 transitions. [2024-06-20 15:17:57,656 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5857142857142857 [2024-06-20 15:17:57,656 INFO L175 Difference]: Start difference. First operand has 337 places, 408 transitions, 5858 flow. Second operand 7 states and 164 transitions. [2024-06-20 15:17:57,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 423 transitions, 6896 flow [2024-06-20 15:18:00,518 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 423 transitions, 6360 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-20 15:18:00,523 INFO L231 Difference]: Finished difference. Result has 337 places, 408 transitions, 5632 flow [2024-06-20 15:18:00,523 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5322, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=408, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=151, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5632, PETRI_PLACES=337, PETRI_TRANSITIONS=408} [2024-06-20 15:18:00,523 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 296 predicate places. [2024-06-20 15:18:00,523 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 408 transitions, 5632 flow [2024-06-20 15:18:00,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:18:00,523 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:18:00,524 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:18:00,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-20 15:18:00,524 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:18:00,524 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:18:00,524 INFO L85 PathProgramCache]: Analyzing trace with hash -563004397, now seen corresponding path program 5 times [2024-06-20 15:18:00,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:18:00,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937024479] [2024-06-20 15:18:00,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:18:00,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:18:00,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:18:00,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:18:00,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:18:00,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937024479] [2024-06-20 15:18:00,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937024479] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:18:00,596 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:18:00,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:18:00,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40818115] [2024-06-20 15:18:00,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:18:00,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:18:00,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:18:00,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:18:00,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:18:00,629 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:18:00,629 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 408 transitions, 5632 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:18:00,629 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:18:00,629 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:18:00,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:18:01,754 INFO L124 PetriNetUnfolderBase]: 4217/7222 cut-off events. [2024-06-20 15:18:01,754 INFO L125 PetriNetUnfolderBase]: For 582340/582348 co-relation queries the response was YES. [2024-06-20 15:18:01,826 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47103 conditions, 7222 events. 4217/7222 cut-off events. For 582340/582348 co-relation queries the response was YES. Maximal size of possible extension queue 460. Compared 51815 event pairs, 1323 based on Foata normal form. 7/7223 useless extension candidates. Maximal degree in co-relation 46947. Up to 6472 conditions per place. [2024-06-20 15:18:01,847 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 353 selfloop transitions, 74 changer transitions 0/434 dead transitions. [2024-06-20 15:18:01,847 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 434 transitions, 6764 flow [2024-06-20 15:18:01,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:18:01,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:18:01,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 199 transitions. [2024-06-20 15:18:01,847 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5527777777777778 [2024-06-20 15:18:01,847 INFO L175 Difference]: Start difference. First operand has 337 places, 408 transitions, 5632 flow. Second operand 9 states and 199 transitions. [2024-06-20 15:18:01,848 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 434 transitions, 6764 flow [2024-06-20 15:18:04,088 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 434 transitions, 6432 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-20 15:18:04,093 INFO L231 Difference]: Finished difference. Result has 340 places, 414 transitions, 5518 flow [2024-06-20 15:18:04,093 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5312, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=408, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=337, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5518, PETRI_PLACES=340, PETRI_TRANSITIONS=414} [2024-06-20 15:18:04,093 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 299 predicate places. [2024-06-20 15:18:04,093 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 414 transitions, 5518 flow [2024-06-20 15:18:04,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:18:04,093 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:18:04,093 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:18:04,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-20 15:18:04,094 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:18:04,094 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:18:04,094 INFO L85 PathProgramCache]: Analyzing trace with hash -835903755, now seen corresponding path program 6 times [2024-06-20 15:18:04,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:18:04,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111068437] [2024-06-20 15:18:04,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:18:04,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:18:04,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:18:04,165 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:18:04,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:18:04,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111068437] [2024-06-20 15:18:04,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111068437] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:18:04,165 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:18:04,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:18:04,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022108584] [2024-06-20 15:18:04,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:18:04,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:18:04,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:18:04,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:18:04,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:18:04,187 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:18:04,187 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 414 transitions, 5518 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:18:04,187 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:18:04,187 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:18:04,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:18:05,361 INFO L124 PetriNetUnfolderBase]: 4214/7218 cut-off events. [2024-06-20 15:18:05,362 INFO L125 PetriNetUnfolderBase]: For 589601/589609 co-relation queries the response was YES. [2024-06-20 15:18:05,437 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46869 conditions, 7218 events. 4214/7218 cut-off events. For 589601/589609 co-relation queries the response was YES. Maximal size of possible extension queue 460. Compared 51793 event pairs, 1323 based on Foata normal form. 7/7219 useless extension candidates. Maximal degree in co-relation 46712. Up to 6469 conditions per place. [2024-06-20 15:18:05,458 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 351 selfloop transitions, 73 changer transitions 0/431 dead transitions. [2024-06-20 15:18:05,458 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 431 transitions, 6408 flow [2024-06-20 15:18:05,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:18:05,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:18:05,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 164 transitions. [2024-06-20 15:18:05,458 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5857142857142857 [2024-06-20 15:18:05,459 INFO L175 Difference]: Start difference. First operand has 340 places, 414 transitions, 5518 flow. Second operand 7 states and 164 transitions. [2024-06-20 15:18:05,459 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 431 transitions, 6408 flow [2024-06-20 15:18:07,950 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 431 transitions, 6315 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-20 15:18:07,955 INFO L231 Difference]: Finished difference. Result has 342 places, 414 transitions, 5577 flow [2024-06-20 15:18:07,955 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5425, PETRI_DIFFERENCE_MINUEND_PLACES=335, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=414, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=341, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5577, PETRI_PLACES=342, PETRI_TRANSITIONS=414} [2024-06-20 15:18:07,955 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 301 predicate places. [2024-06-20 15:18:07,955 INFO L495 AbstractCegarLoop]: Abstraction has has 342 places, 414 transitions, 5577 flow [2024-06-20 15:18:07,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:18:07,955 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:18:07,955 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:18:07,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-20 15:18:07,956 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:18:07,956 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:18:07,956 INFO L85 PathProgramCache]: Analyzing trace with hash 444229313, now seen corresponding path program 7 times [2024-06-20 15:18:07,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:18:07,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691604501] [2024-06-20 15:18:07,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:18:07,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:18:07,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:18:08,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:18:08,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:18:08,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691604501] [2024-06-20 15:18:08,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691604501] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:18:08,029 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:18:08,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:18:08,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025425327] [2024-06-20 15:18:08,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:18:08,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:18:08,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:18:08,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:18:08,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:18:08,062 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:18:08,062 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 342 places, 414 transitions, 5577 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:18:08,062 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:18:08,062 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:18:08,062 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:18:09,226 INFO L124 PetriNetUnfolderBase]: 4235/7253 cut-off events. [2024-06-20 15:18:09,226 INFO L125 PetriNetUnfolderBase]: For 608460/608468 co-relation queries the response was YES. [2024-06-20 15:18:09,302 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47517 conditions, 7253 events. 4235/7253 cut-off events. For 608460/608468 co-relation queries the response was YES. Maximal size of possible extension queue 460. Compared 52088 event pairs, 1331 based on Foata normal form. 7/7254 useless extension candidates. Maximal degree in co-relation 47358. Up to 6229 conditions per place. [2024-06-20 15:18:09,324 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 275 selfloop transitions, 168 changer transitions 0/450 dead transitions. [2024-06-20 15:18:09,324 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 450 transitions, 6962 flow [2024-06-20 15:18:09,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:18:09,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:18:09,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 211 transitions. [2024-06-20 15:18:09,325 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5861111111111111 [2024-06-20 15:18:09,325 INFO L175 Difference]: Start difference. First operand has 342 places, 414 transitions, 5577 flow. Second operand 9 states and 211 transitions. [2024-06-20 15:18:09,325 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 450 transitions, 6962 flow [2024-06-20 15:18:12,773 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 450 transitions, 6816 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-20 15:18:12,778 INFO L231 Difference]: Finished difference. Result has 345 places, 423 transitions, 5858 flow [2024-06-20 15:18:12,778 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5431, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=414, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=159, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=255, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5858, PETRI_PLACES=345, PETRI_TRANSITIONS=423} [2024-06-20 15:18:12,778 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 304 predicate places. [2024-06-20 15:18:12,778 INFO L495 AbstractCegarLoop]: Abstraction has has 345 places, 423 transitions, 5858 flow [2024-06-20 15:18:12,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:18:12,778 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:18:12,778 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:18:12,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-20 15:18:12,778 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:18:12,778 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:18:12,779 INFO L85 PathProgramCache]: Analyzing trace with hash 444580853, now seen corresponding path program 8 times [2024-06-20 15:18:12,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:18:12,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915530961] [2024-06-20 15:18:12,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:18:12,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:18:12,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:18:12,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:18:12,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:18:12,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915530961] [2024-06-20 15:18:12,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915530961] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:18:12,850 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:18:12,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:18:12,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746171694] [2024-06-20 15:18:12,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:18:12,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:18:12,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:18:12,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:18:12,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:18:12,878 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:18:12,878 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 423 transitions, 5858 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:18:12,878 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:18:12,878 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:18:12,878 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:18:14,044 INFO L124 PetriNetUnfolderBase]: 4240/7259 cut-off events. [2024-06-20 15:18:14,044 INFO L125 PetriNetUnfolderBase]: For 623630/623633 co-relation queries the response was YES. [2024-06-20 15:18:14,118 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48037 conditions, 7259 events. 4240/7259 cut-off events. For 623630/623633 co-relation queries the response was YES. Maximal size of possible extension queue 460. Compared 52130 event pairs, 1332 based on Foata normal form. 3/7254 useless extension candidates. Maximal degree in co-relation 47877. Up to 6235 conditions per place. [2024-06-20 15:18:14,139 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 266 selfloop transitions, 170 changer transitions 0/443 dead transitions. [2024-06-20 15:18:14,139 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 443 transitions, 7155 flow [2024-06-20 15:18:14,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:18:14,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:18:14,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 186 transitions. [2024-06-20 15:18:14,140 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.58125 [2024-06-20 15:18:14,140 INFO L175 Difference]: Start difference. First operand has 345 places, 423 transitions, 5858 flow. Second operand 8 states and 186 transitions. [2024-06-20 15:18:14,140 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 443 transitions, 7155 flow [2024-06-20 15:18:17,375 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 443 transitions, 6813 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-20 15:18:17,379 INFO L231 Difference]: Finished difference. Result has 346 places, 426 transitions, 5897 flow [2024-06-20 15:18:17,380 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5526, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=423, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=167, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5897, PETRI_PLACES=346, PETRI_TRANSITIONS=426} [2024-06-20 15:18:17,380 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 305 predicate places. [2024-06-20 15:18:17,380 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 426 transitions, 5897 flow [2024-06-20 15:18:17,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:18:17,380 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:18:17,380 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:18:17,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-20 15:18:17,380 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:18:17,381 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:18:17,381 INFO L85 PathProgramCache]: Analyzing trace with hash 444407873, now seen corresponding path program 9 times [2024-06-20 15:18:17,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:18:17,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435031197] [2024-06-20 15:18:17,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:18:17,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:18:17,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:18:17,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:18:17,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:18:17,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435031197] [2024-06-20 15:18:17,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435031197] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:18:17,452 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:18:17,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:18:17,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470941103] [2024-06-20 15:18:17,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:18:17,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:18:17,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:18:17,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:18:17,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:18:17,479 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:18:17,479 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 426 transitions, 5897 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:18:17,479 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:18:17,479 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:18:17,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:18:18,642 INFO L124 PetriNetUnfolderBase]: 4237/7255 cut-off events. [2024-06-20 15:18:18,642 INFO L125 PetriNetUnfolderBase]: For 620129/620132 co-relation queries the response was YES. [2024-06-20 15:18:18,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47906 conditions, 7255 events. 4237/7255 cut-off events. For 620129/620132 co-relation queries the response was YES. Maximal size of possible extension queue 460. Compared 52104 event pairs, 1345 based on Foata normal form. 3/7250 useless extension candidates. Maximal degree in co-relation 47746. Up to 6232 conditions per place. [2024-06-20 15:18:18,733 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 286 selfloop transitions, 148 changer transitions 0/441 dead transitions. [2024-06-20 15:18:18,733 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 441 transitions, 7157 flow [2024-06-20 15:18:18,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:18:18,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:18:18,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 145 transitions. [2024-06-20 15:18:18,734 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6041666666666666 [2024-06-20 15:18:18,734 INFO L175 Difference]: Start difference. First operand has 346 places, 426 transitions, 5897 flow. Second operand 6 states and 145 transitions. [2024-06-20 15:18:18,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 441 transitions, 7157 flow [2024-06-20 15:18:21,408 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 441 transitions, 6882 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-06-20 15:18:21,412 INFO L231 Difference]: Finished difference. Result has 348 places, 426 transitions, 5925 flow [2024-06-20 15:18:21,413 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5622, PETRI_DIFFERENCE_MINUEND_PLACES=342, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=426, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=278, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5925, PETRI_PLACES=348, PETRI_TRANSITIONS=426} [2024-06-20 15:18:21,413 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 307 predicate places. [2024-06-20 15:18:21,413 INFO L495 AbstractCegarLoop]: Abstraction has has 348 places, 426 transitions, 5925 flow [2024-06-20 15:18:21,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:18:21,413 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:18:21,413 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:18:21,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-20 15:18:21,413 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:18:21,414 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:18:21,414 INFO L85 PathProgramCache]: Analyzing trace with hash 444223733, now seen corresponding path program 10 times [2024-06-20 15:18:21,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:18:21,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952196381] [2024-06-20 15:18:21,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:18:21,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:18:21,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:18:21,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:18:21,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:18:21,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952196381] [2024-06-20 15:18:21,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952196381] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:18:21,484 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:18:21,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:18:21,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437263153] [2024-06-20 15:18:21,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:18:21,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:18:21,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:18:21,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:18:21,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:18:21,513 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:18:21,514 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 426 transitions, 5925 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:18:21,514 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:18:21,514 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:18:21,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:18:22,699 INFO L124 PetriNetUnfolderBase]: 4234/7254 cut-off events. [2024-06-20 15:18:22,699 INFO L125 PetriNetUnfolderBase]: For 628935/628943 co-relation queries the response was YES. [2024-06-20 15:18:22,773 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47954 conditions, 7254 events. 4234/7254 cut-off events. For 628935/628943 co-relation queries the response was YES. Maximal size of possible extension queue 460. Compared 52061 event pairs, 1321 based on Foata normal form. 7/7255 useless extension candidates. Maximal degree in co-relation 47793. Up to 6229 conditions per place. [2024-06-20 15:18:22,794 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 283 selfloop transitions, 165 changer transitions 0/455 dead transitions. [2024-06-20 15:18:22,794 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 455 transitions, 7253 flow [2024-06-20 15:18:22,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:18:22,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:18:22,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-06-20 15:18:22,795 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.61875 [2024-06-20 15:18:22,795 INFO L175 Difference]: Start difference. First operand has 348 places, 426 transitions, 5925 flow. Second operand 8 states and 198 transitions. [2024-06-20 15:18:22,795 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 455 transitions, 7253 flow [2024-06-20 15:18:25,530 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 350 places, 455 transitions, 6926 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-06-20 15:18:25,535 INFO L231 Difference]: Finished difference. Result has 351 places, 426 transitions, 5939 flow [2024-06-20 15:18:25,535 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5598, PETRI_DIFFERENCE_MINUEND_PLACES=343, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=426, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=165, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5939, PETRI_PLACES=351, PETRI_TRANSITIONS=426} [2024-06-20 15:18:25,535 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 310 predicate places. [2024-06-20 15:18:25,535 INFO L495 AbstractCegarLoop]: Abstraction has has 351 places, 426 transitions, 5939 flow [2024-06-20 15:18:25,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:18:25,536 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:18:25,536 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:18:25,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-20 15:18:25,536 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:18:25,536 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:18:25,536 INFO L85 PathProgramCache]: Analyzing trace with hash 444396713, now seen corresponding path program 11 times [2024-06-20 15:18:25,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:18:25,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579023254] [2024-06-20 15:18:25,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:18:25,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:18:25,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:18:25,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:18:25,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:18:25,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579023254] [2024-06-20 15:18:25,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579023254] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:18:25,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:18:25,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:18:25,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028748649] [2024-06-20 15:18:25,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:18:25,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:18:25,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:18:25,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:18:25,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:18:25,630 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:18:25,631 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 351 places, 426 transitions, 5939 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:18:25,631 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:18:25,631 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:18:25,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:18:26,816 INFO L124 PetriNetUnfolderBase]: 4231/7247 cut-off events. [2024-06-20 15:18:26,816 INFO L125 PetriNetUnfolderBase]: For 637592/637595 co-relation queries the response was YES. [2024-06-20 15:18:26,892 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48031 conditions, 7247 events. 4231/7247 cut-off events. For 637592/637595 co-relation queries the response was YES. Maximal size of possible extension queue 460. Compared 52063 event pairs, 1345 based on Foata normal form. 3/7242 useless extension candidates. Maximal degree in co-relation 47869. Up to 6226 conditions per place. [2024-06-20 15:18:26,913 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 289 selfloop transitions, 147 changer transitions 0/443 dead transitions. [2024-06-20 15:18:26,913 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 443 transitions, 7035 flow [2024-06-20 15:18:26,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:18:26,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:18:26,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 147 transitions. [2024-06-20 15:18:26,914 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6125 [2024-06-20 15:18:26,914 INFO L175 Difference]: Start difference. First operand has 351 places, 426 transitions, 5939 flow. Second operand 6 states and 147 transitions. [2024-06-20 15:18:26,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 443 transitions, 7035 flow [2024-06-20 15:18:30,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 443 transitions, 6681 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-20 15:18:30,214 INFO L231 Difference]: Finished difference. Result has 350 places, 426 transitions, 5889 flow [2024-06-20 15:18:30,215 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5587, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=426, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5889, PETRI_PLACES=350, PETRI_TRANSITIONS=426} [2024-06-20 15:18:30,215 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 309 predicate places. [2024-06-20 15:18:30,215 INFO L495 AbstractCegarLoop]: Abstraction has has 350 places, 426 transitions, 5889 flow [2024-06-20 15:18:30,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:18:30,215 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:18:30,215 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:18:30,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-20 15:18:30,215 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:18:30,216 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:18:30,216 INFO L85 PathProgramCache]: Analyzing trace with hash 444575273, now seen corresponding path program 12 times [2024-06-20 15:18:30,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:18:30,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676458136] [2024-06-20 15:18:30,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:18:30,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:18:30,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:18:30,292 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:18:30,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:18:30,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676458136] [2024-06-20 15:18:30,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676458136] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:18:30,292 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:18:30,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:18:30,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120264408] [2024-06-20 15:18:30,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:18:30,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:18:30,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:18:30,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:18:30,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:18:30,324 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:18:30,324 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 350 places, 426 transitions, 5889 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:18:30,324 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:18:30,324 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:18:30,324 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:18:31,504 INFO L124 PetriNetUnfolderBase]: 4228/7243 cut-off events. [2024-06-20 15:18:31,504 INFO L125 PetriNetUnfolderBase]: For 632848/632851 co-relation queries the response was YES. [2024-06-20 15:18:31,580 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47848 conditions, 7243 events. 4228/7243 cut-off events. For 632848/632851 co-relation queries the response was YES. Maximal size of possible extension queue 458. Compared 51999 event pairs, 1332 based on Foata normal form. 3/7238 useless extension candidates. Maximal degree in co-relation 47686. Up to 6223 conditions per place. [2024-06-20 15:18:31,601 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 260 selfloop transitions, 175 changer transitions 0/442 dead transitions. [2024-06-20 15:18:31,601 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 442 transitions, 6797 flow [2024-06-20 15:18:31,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:18:31,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:18:31,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 200 transitions. [2024-06-20 15:18:31,601 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5555555555555556 [2024-06-20 15:18:31,601 INFO L175 Difference]: Start difference. First operand has 350 places, 426 transitions, 5889 flow. Second operand 9 states and 200 transitions. [2024-06-20 15:18:31,601 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 442 transitions, 6797 flow [2024-06-20 15:18:34,012 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 352 places, 442 transitions, 6453 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-20 15:18:34,017 INFO L231 Difference]: Finished difference. Result has 353 places, 426 transitions, 5901 flow [2024-06-20 15:18:34,017 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5545, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=426, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=175, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5901, PETRI_PLACES=353, PETRI_TRANSITIONS=426} [2024-06-20 15:18:34,017 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 312 predicate places. [2024-06-20 15:18:34,017 INFO L495 AbstractCegarLoop]: Abstraction has has 353 places, 426 transitions, 5901 flow [2024-06-20 15:18:34,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:18:34,017 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:18:34,018 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:18:34,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-20 15:18:34,018 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:18:34,019 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:18:34,019 INFO L85 PathProgramCache]: Analyzing trace with hash 1893304628, now seen corresponding path program 4 times [2024-06-20 15:18:34,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:18:34,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762931574] [2024-06-20 15:18:34,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:18:34,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:18:34,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:18:34,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:18:34,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:18:34,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762931574] [2024-06-20 15:18:34,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762931574] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:18:34,120 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:18:34,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:18:34,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852667251] [2024-06-20 15:18:34,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:18:34,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:18:34,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:18:34,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:18:34,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:18:34,160 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:18:34,160 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 426 transitions, 5901 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-20 15:18:34,160 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:18:34,160 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:18:34,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:18:35,375 INFO L124 PetriNetUnfolderBase]: 4264/7274 cut-off events. [2024-06-20 15:18:35,375 INFO L125 PetriNetUnfolderBase]: For 682880/682883 co-relation queries the response was YES. [2024-06-20 15:18:35,450 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48408 conditions, 7274 events. 4264/7274 cut-off events. For 682880/682883 co-relation queries the response was YES. Maximal size of possible extension queue 461. Compared 52051 event pairs, 1291 based on Foata normal form. 12/7269 useless extension candidates. Maximal degree in co-relation 48245. Up to 6488 conditions per place. [2024-06-20 15:18:35,470 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 349 selfloop transitions, 91 changer transitions 4/451 dead transitions. [2024-06-20 15:18:35,470 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 451 transitions, 6932 flow [2024-06-20 15:18:35,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:18:35,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:18:35,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 206 transitions. [2024-06-20 15:18:35,471 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5722222222222222 [2024-06-20 15:18:35,471 INFO L175 Difference]: Start difference. First operand has 353 places, 426 transitions, 5901 flow. Second operand 9 states and 206 transitions. [2024-06-20 15:18:35,471 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 451 transitions, 6932 flow [2024-06-20 15:18:37,895 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 350 places, 451 transitions, 6406 flow, removed 3 selfloop flow, removed 11 redundant places. [2024-06-20 15:18:37,900 INFO L231 Difference]: Finished difference. Result has 351 places, 427 transitions, 5629 flow [2024-06-20 15:18:37,900 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5375, PETRI_DIFFERENCE_MINUEND_PLACES=342, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=426, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=335, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5629, PETRI_PLACES=351, PETRI_TRANSITIONS=427} [2024-06-20 15:18:37,900 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 310 predicate places. [2024-06-20 15:18:37,900 INFO L495 AbstractCegarLoop]: Abstraction has has 351 places, 427 transitions, 5629 flow [2024-06-20 15:18:37,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-20 15:18:37,900 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:18:37,900 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:18:37,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-20 15:18:37,900 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:18:37,901 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:18:37,901 INFO L85 PathProgramCache]: Analyzing trace with hash 78898774, now seen corresponding path program 5 times [2024-06-20 15:18:37,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:18:37,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485774666] [2024-06-20 15:18:37,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:18:37,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:18:37,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:18:37,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:18:37,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:18:37,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485774666] [2024-06-20 15:18:37,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485774666] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:18:37,980 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:18:37,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:18:37,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106196812] [2024-06-20 15:18:37,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:18:37,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:18:37,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:18:37,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:18:37,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:18:38,032 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:18:38,033 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 351 places, 427 transitions, 5629 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-20 15:18:38,033 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:18:38,033 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:18:38,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:18:39,267 INFO L124 PetriNetUnfolderBase]: 4393/7464 cut-off events. [2024-06-20 15:18:39,267 INFO L125 PetriNetUnfolderBase]: For 772700/772700 co-relation queries the response was YES. [2024-06-20 15:18:39,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52591 conditions, 7464 events. 4393/7464 cut-off events. For 772700/772700 co-relation queries the response was YES. Maximal size of possible extension queue 477. Compared 53333 event pairs, 1386 based on Foata normal form. 2/7458 useless extension candidates. Maximal degree in co-relation 52427. Up to 6242 conditions per place. [2024-06-20 15:18:39,367 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 243 selfloop transitions, 215 changer transitions 0/465 dead transitions. [2024-06-20 15:18:39,367 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 465 transitions, 7090 flow [2024-06-20 15:18:39,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:18:39,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:18:39,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-06-20 15:18:39,368 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.61875 [2024-06-20 15:18:39,368 INFO L175 Difference]: Start difference. First operand has 351 places, 427 transitions, 5629 flow. Second operand 8 states and 198 transitions. [2024-06-20 15:18:39,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 465 transitions, 7090 flow [2024-06-20 15:18:41,900 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 350 places, 465 transitions, 6819 flow, removed 29 selfloop flow, removed 8 redundant places. [2024-06-20 15:18:41,905 INFO L231 Difference]: Finished difference. Result has 352 places, 435 transitions, 6097 flow [2024-06-20 15:18:41,905 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5358, PETRI_DIFFERENCE_MINUEND_PLACES=343, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=427, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=207, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6097, PETRI_PLACES=352, PETRI_TRANSITIONS=435} [2024-06-20 15:18:41,905 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 311 predicate places. [2024-06-20 15:18:41,905 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 435 transitions, 6097 flow [2024-06-20 15:18:41,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-20 15:18:41,905 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:18:41,905 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:18:41,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-20 15:18:41,905 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:18:41,906 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:18:41,906 INFO L85 PathProgramCache]: Analyzing trace with hash 1951719412, now seen corresponding path program 6 times [2024-06-20 15:18:41,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:18:41,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490053378] [2024-06-20 15:18:41,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:18:41,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:18:41,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:18:41,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:18:41,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:18:41,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490053378] [2024-06-20 15:18:41,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490053378] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:18:41,985 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:18:41,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:18:41,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798560739] [2024-06-20 15:18:41,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:18:41,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:18:41,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:18:41,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:18:41,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:18:42,017 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:18:42,017 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 435 transitions, 6097 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-20 15:18:42,017 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:18:42,017 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:18:42,017 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:18:43,327 INFO L124 PetriNetUnfolderBase]: 4578/7738 cut-off events. [2024-06-20 15:18:43,327 INFO L125 PetriNetUnfolderBase]: For 936148/936148 co-relation queries the response was YES. [2024-06-20 15:18:43,406 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59223 conditions, 7738 events. 4578/7738 cut-off events. For 936148/936148 co-relation queries the response was YES. Maximal size of possible extension queue 504. Compared 55218 event pairs, 1452 based on Foata normal form. 2/7732 useless extension candidates. Maximal degree in co-relation 59057. Up to 6471 conditions per place. [2024-06-20 15:18:43,430 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 254 selfloop transitions, 212 changer transitions 0/473 dead transitions. [2024-06-20 15:18:43,430 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 473 transitions, 7592 flow [2024-06-20 15:18:43,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:18:43,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:18:43,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-06-20 15:18:43,431 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.61875 [2024-06-20 15:18:43,431 INFO L175 Difference]: Start difference. First operand has 352 places, 435 transitions, 6097 flow. Second operand 8 states and 198 transitions. [2024-06-20 15:18:43,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 473 transitions, 7592 flow [2024-06-20 15:18:46,044 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 354 places, 473 transitions, 7114 flow, removed 33 selfloop flow, removed 5 redundant places. [2024-06-20 15:18:46,049 INFO L231 Difference]: Finished difference. Result has 356 places, 443 transitions, 6369 flow [2024-06-20 15:18:46,049 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5619, PETRI_DIFFERENCE_MINUEND_PLACES=347, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=435, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=204, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6369, PETRI_PLACES=356, PETRI_TRANSITIONS=443} [2024-06-20 15:18:46,049 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 315 predicate places. [2024-06-20 15:18:46,049 INFO L495 AbstractCegarLoop]: Abstraction has has 356 places, 443 transitions, 6369 flow [2024-06-20 15:18:46,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-20 15:18:46,049 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:18:46,049 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:18:46,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-20 15:18:46,049 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:18:46,050 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:18:46,050 INFO L85 PathProgramCache]: Analyzing trace with hash 1982106808, now seen corresponding path program 7 times [2024-06-20 15:18:46,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:18:46,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395000316] [2024-06-20 15:18:46,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:18:46,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:18:46,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:18:46,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:18:46,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:18:46,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395000316] [2024-06-20 15:18:46,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395000316] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:18:46,132 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:18:46,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:18:46,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044216831] [2024-06-20 15:18:46,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:18:46,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:18:46,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:18:46,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:18:46,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:18:46,163 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:18:46,163 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 356 places, 443 transitions, 6369 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-20 15:18:46,163 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:18:46,163 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:18:46,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:18:47,661 INFO L124 PetriNetUnfolderBase]: 4573/7737 cut-off events. [2024-06-20 15:18:47,662 INFO L125 PetriNetUnfolderBase]: For 943935/943935 co-relation queries the response was YES. [2024-06-20 15:18:47,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59300 conditions, 7737 events. 4573/7737 cut-off events. For 943935/943935 co-relation queries the response was YES. Maximal size of possible extension queue 503. Compared 55304 event pairs, 1459 based on Foata normal form. 2/7732 useless extension candidates. Maximal degree in co-relation 59132. Up to 6663 conditions per place. [2024-06-20 15:18:47,757 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 250 selfloop transitions, 208 changer transitions 0/465 dead transitions. [2024-06-20 15:18:47,757 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 363 places, 465 transitions, 7339 flow [2024-06-20 15:18:47,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:18:47,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:18:47,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 190 transitions. [2024-06-20 15:18:47,758 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.59375 [2024-06-20 15:18:47,758 INFO L175 Difference]: Start difference. First operand has 356 places, 443 transitions, 6369 flow. Second operand 8 states and 190 transitions. [2024-06-20 15:18:47,758 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 363 places, 465 transitions, 7339 flow [2024-06-20 15:18:49,989 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 465 transitions, 6852 flow, removed 41 selfloop flow, removed 5 redundant places. [2024-06-20 15:18:49,994 INFO L231 Difference]: Finished difference. Result has 359 places, 443 transitions, 6303 flow [2024-06-20 15:18:49,994 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5882, PETRI_DIFFERENCE_MINUEND_PLACES=351, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=443, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=208, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6303, PETRI_PLACES=359, PETRI_TRANSITIONS=443} [2024-06-20 15:18:49,994 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 318 predicate places. [2024-06-20 15:18:49,994 INFO L495 AbstractCegarLoop]: Abstraction has has 359 places, 443 transitions, 6303 flow [2024-06-20 15:18:49,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-20 15:18:49,995 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:18:49,995 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:18:49,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-20 15:18:49,995 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:18:49,995 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:18:49,995 INFO L85 PathProgramCache]: Analyzing trace with hash 1313361080, now seen corresponding path program 8 times [2024-06-20 15:18:49,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:18:49,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771389427] [2024-06-20 15:18:49,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:18:49,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:18:49,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:18:50,076 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:18:50,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:18:50,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771389427] [2024-06-20 15:18:50,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771389427] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:18:50,077 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:18:50,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:18:50,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397649203] [2024-06-20 15:18:50,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:18:50,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:18:50,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:18:50,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:18:50,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:18:50,112 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:18:50,113 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 443 transitions, 6303 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-20 15:18:50,113 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:18:50,113 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:18:50,113 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:18:51,420 INFO L124 PetriNetUnfolderBase]: 4581/7749 cut-off events. [2024-06-20 15:18:51,421 INFO L125 PetriNetUnfolderBase]: For 958631/958631 co-relation queries the response was YES. [2024-06-20 15:18:51,501 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59186 conditions, 7749 events. 4581/7749 cut-off events. For 958631/958631 co-relation queries the response was YES. Maximal size of possible extension queue 503. Compared 55391 event pairs, 1459 based on Foata normal form. 2/7744 useless extension candidates. Maximal degree in co-relation 59017. Up to 6675 conditions per place. [2024-06-20 15:18:51,524 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 255 selfloop transitions, 205 changer transitions 0/467 dead transitions. [2024-06-20 15:18:51,524 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 467 transitions, 7338 flow [2024-06-20 15:18:51,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:18:51,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:18:51,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 190 transitions. [2024-06-20 15:18:51,525 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.59375 [2024-06-20 15:18:51,525 INFO L175 Difference]: Start difference. First operand has 359 places, 443 transitions, 6303 flow. Second operand 8 states and 190 transitions. [2024-06-20 15:18:51,525 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 467 transitions, 7338 flow [2024-06-20 15:18:54,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 467 transitions, 6879 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-20 15:18:54,089 INFO L231 Difference]: Finished difference. Result has 361 places, 445 transitions, 6324 flow [2024-06-20 15:18:54,089 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5844, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=443, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=203, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6324, PETRI_PLACES=361, PETRI_TRANSITIONS=445} [2024-06-20 15:18:54,089 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 320 predicate places. [2024-06-20 15:18:54,090 INFO L495 AbstractCegarLoop]: Abstraction has has 361 places, 445 transitions, 6324 flow [2024-06-20 15:18:54,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-20 15:18:54,090 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:18:54,090 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:18:54,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-20 15:18:54,090 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:18:54,090 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:18:54,090 INFO L85 PathProgramCache]: Analyzing trace with hash 1598400500, now seen corresponding path program 9 times [2024-06-20 15:18:54,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:18:54,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106891750] [2024-06-20 15:18:54,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:18:54,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:18:54,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:18:54,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:18:54,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:18:54,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106891750] [2024-06-20 15:18:54,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106891750] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:18:54,167 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:18:54,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:18:54,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105157399] [2024-06-20 15:18:54,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:18:54,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:18:54,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:18:54,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:18:54,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:18:54,210 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:18:54,210 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 361 places, 445 transitions, 6324 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-20 15:18:54,210 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:18:54,210 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:18:54,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:18:55,566 INFO L124 PetriNetUnfolderBase]: 4589/7761 cut-off events. [2024-06-20 15:18:55,566 INFO L125 PetriNetUnfolderBase]: For 977239/977239 co-relation queries the response was YES. [2024-06-20 15:18:55,649 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59503 conditions, 7761 events. 4589/7761 cut-off events. For 977239/977239 co-relation queries the response was YES. Maximal size of possible extension queue 503. Compared 55172 event pairs, 1304 based on Foata normal form. 2/7756 useless extension candidates. Maximal degree in co-relation 59333. Up to 3602 conditions per place. [2024-06-20 15:18:55,673 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 235 selfloop transitions, 242 changer transitions 0/484 dead transitions. [2024-06-20 15:18:55,673 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 484 transitions, 7853 flow [2024-06-20 15:18:55,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:18:55,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:18:55,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 204 transitions. [2024-06-20 15:18:55,674 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6375 [2024-06-20 15:18:55,674 INFO L175 Difference]: Start difference. First operand has 361 places, 445 transitions, 6324 flow. Second operand 8 states and 204 transitions. [2024-06-20 15:18:55,674 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 484 transitions, 7853 flow [2024-06-20 15:18:58,325 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 484 transitions, 7400 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-20 15:18:58,330 INFO L231 Difference]: Finished difference. Result has 363 places, 447 transitions, 6427 flow [2024-06-20 15:18:58,330 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5871, PETRI_DIFFERENCE_MINUEND_PLACES=355, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=445, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=240, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6427, PETRI_PLACES=363, PETRI_TRANSITIONS=447} [2024-06-20 15:18:58,330 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 322 predicate places. [2024-06-20 15:18:58,331 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 447 transitions, 6427 flow [2024-06-20 15:18:58,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-20 15:18:58,331 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:18:58,331 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:18:58,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-20 15:18:58,331 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:18:58,331 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:18:58,331 INFO L85 PathProgramCache]: Analyzing trace with hash 1609828340, now seen corresponding path program 10 times [2024-06-20 15:18:58,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:18:58,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248504524] [2024-06-20 15:18:58,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:18:58,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:18:58,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:18:58,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:18:58,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:18:58,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248504524] [2024-06-20 15:18:58,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248504524] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:18:58,415 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:18:58,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:18:58,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884031628] [2024-06-20 15:18:58,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:18:58,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:18:58,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:18:58,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:18:58,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:18:58,470 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:18:58,470 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 447 transitions, 6427 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-20 15:18:58,470 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:18:58,470 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:18:58,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:18:59,829 INFO L124 PetriNetUnfolderBase]: 4564/7720 cut-off events. [2024-06-20 15:18:59,829 INFO L125 PetriNetUnfolderBase]: For 990761/990761 co-relation queries the response was YES. [2024-06-20 15:18:59,908 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59203 conditions, 7720 events. 4564/7720 cut-off events. For 990761/990761 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 54835 event pairs, 1311 based on Foata normal form. 8/7721 useless extension candidates. Maximal degree in co-relation 59032. Up to 3588 conditions per place. [2024-06-20 15:18:59,931 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 245 selfloop transitions, 229 changer transitions 2/483 dead transitions. [2024-06-20 15:18:59,931 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 483 transitions, 7695 flow [2024-06-20 15:18:59,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:18:59,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:18:59,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 203 transitions. [2024-06-20 15:18:59,932 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.634375 [2024-06-20 15:18:59,932 INFO L175 Difference]: Start difference. First operand has 363 places, 447 transitions, 6427 flow. Second operand 8 states and 203 transitions. [2024-06-20 15:18:59,932 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 483 transitions, 7695 flow [2024-06-20 15:19:02,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 483 transitions, 7051 flow, removed 69 selfloop flow, removed 8 redundant places. [2024-06-20 15:19:02,802 INFO L231 Difference]: Finished difference. Result has 363 places, 447 transitions, 6247 flow [2024-06-20 15:19:02,803 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5783, PETRI_DIFFERENCE_MINUEND_PLACES=355, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=447, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=229, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6247, PETRI_PLACES=363, PETRI_TRANSITIONS=447} [2024-06-20 15:19:02,803 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 322 predicate places. [2024-06-20 15:19:02,803 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 447 transitions, 6247 flow [2024-06-20 15:19:02,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-20 15:19:02,803 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:19:02,803 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:19:02,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-20 15:19:02,803 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:19:02,803 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:19:02,803 INFO L85 PathProgramCache]: Analyzing trace with hash 660163994, now seen corresponding path program 11 times [2024-06-20 15:19:02,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:19:02,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286474489] [2024-06-20 15:19:02,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:19:02,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:19:02,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:19:02,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:19:02,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:19:02,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286474489] [2024-06-20 15:19:02,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286474489] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:19:02,897 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:19:02,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:19:02,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065167184] [2024-06-20 15:19:02,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:19:02,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:19:02,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:19:02,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:19:02,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:19:02,952 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:19:02,953 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 447 transitions, 6247 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-20 15:19:02,953 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:19:02,953 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:19:02,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:19:04,405 INFO L124 PetriNetUnfolderBase]: 4572/7750 cut-off events. [2024-06-20 15:19:04,406 INFO L125 PetriNetUnfolderBase]: For 970364/970364 co-relation queries the response was YES. [2024-06-20 15:19:04,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58533 conditions, 7750 events. 4572/7750 cut-off events. For 970364/970364 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 55505 event pairs, 1410 based on Foata normal form. 2/7747 useless extension candidates. Maximal degree in co-relation 58364. Up to 7009 conditions per place. [2024-06-20 15:19:04,508 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 380 selfloop transitions, 81 changer transitions 0/468 dead transitions. [2024-06-20 15:19:04,508 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 468 transitions, 7287 flow [2024-06-20 15:19:04,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:19:04,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:19:04,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 182 transitions. [2024-06-20 15:19:04,509 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.56875 [2024-06-20 15:19:04,509 INFO L175 Difference]: Start difference. First operand has 363 places, 447 transitions, 6247 flow. Second operand 8 states and 182 transitions. [2024-06-20 15:19:04,509 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 468 transitions, 7287 flow [2024-06-20 15:19:07,300 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 468 transitions, 6802 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-20 15:19:07,305 INFO L231 Difference]: Finished difference. Result has 364 places, 449 transitions, 6005 flow [2024-06-20 15:19:07,305 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5764, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=447, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=366, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6005, PETRI_PLACES=364, PETRI_TRANSITIONS=449} [2024-06-20 15:19:07,305 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 323 predicate places. [2024-06-20 15:19:07,305 INFO L495 AbstractCegarLoop]: Abstraction has has 364 places, 449 transitions, 6005 flow [2024-06-20 15:19:07,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-20 15:19:07,305 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:19:07,305 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:19:07,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-20 15:19:07,306 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:19:07,306 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:19:07,306 INFO L85 PathProgramCache]: Analyzing trace with hash 60399604, now seen corresponding path program 12 times [2024-06-20 15:19:07,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:19:07,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194688062] [2024-06-20 15:19:07,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:19:07,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:19:07,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:19:07,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:19:07,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:19:07,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194688062] [2024-06-20 15:19:07,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194688062] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:19:07,388 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:19:07,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:19:07,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748333020] [2024-06-20 15:19:07,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:19:07,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:19:07,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:19:07,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:19:07,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:19:07,428 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:19:07,428 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 364 places, 449 transitions, 6005 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-20 15:19:07,428 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:19:07,428 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:19:07,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:19:08,766 INFO L124 PetriNetUnfolderBase]: 4549/7691 cut-off events. [2024-06-20 15:19:08,766 INFO L125 PetriNetUnfolderBase]: For 973000/973000 co-relation queries the response was YES. [2024-06-20 15:19:08,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56434 conditions, 7691 events. 4549/7691 cut-off events. For 973000/973000 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 54840 event pairs, 1423 based on Foata normal form. 10/7694 useless extension candidates. Maximal degree in co-relation 56264. Up to 6111 conditions per place. [2024-06-20 15:19:08,870 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 266 selfloop transitions, 203 changer transitions 2/478 dead transitions. [2024-06-20 15:19:08,870 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 478 transitions, 7247 flow [2024-06-20 15:19:08,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:19:08,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:19:08,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-20 15:19:08,872 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.615625 [2024-06-20 15:19:08,872 INFO L175 Difference]: Start difference. First operand has 364 places, 449 transitions, 6005 flow. Second operand 8 states and 197 transitions. [2024-06-20 15:19:08,872 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 478 transitions, 7247 flow [2024-06-20 15:19:12,140 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 365 places, 478 transitions, 7038 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-20 15:19:12,145 INFO L231 Difference]: Finished difference. Result has 366 places, 449 transitions, 6209 flow [2024-06-20 15:19:12,145 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5796, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=449, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=203, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6209, PETRI_PLACES=366, PETRI_TRANSITIONS=449} [2024-06-20 15:19:12,145 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 325 predicate places. [2024-06-20 15:19:12,145 INFO L495 AbstractCegarLoop]: Abstraction has has 366 places, 449 transitions, 6209 flow [2024-06-20 15:19:12,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-20 15:19:12,146 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:19:12,146 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:19:12,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-20 15:19:12,146 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:19:12,146 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:19:12,146 INFO L85 PathProgramCache]: Analyzing trace with hash 51828724, now seen corresponding path program 13 times [2024-06-20 15:19:12,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:19:12,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474260153] [2024-06-20 15:19:12,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:19:12,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:19:12,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:19:12,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:19:12,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:19:12,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474260153] [2024-06-20 15:19:12,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474260153] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:19:12,228 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:19:12,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:19:12,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169023543] [2024-06-20 15:19:12,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:19:12,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:19:12,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:19:12,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:19:12,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:19:12,257 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:19:12,257 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 366 places, 449 transitions, 6209 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-20 15:19:12,257 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:19:12,257 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:19:12,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:19:13,585 INFO L124 PetriNetUnfolderBase]: 4519/7651 cut-off events. [2024-06-20 15:19:13,585 INFO L125 PetriNetUnfolderBase]: For 943073/943073 co-relation queries the response was YES. [2024-06-20 15:19:13,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55643 conditions, 7651 events. 4519/7651 cut-off events. For 943073/943073 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 54632 event pairs, 1429 based on Foata normal form. 10/7654 useless extension candidates. Maximal degree in co-relation 55472. Up to 6549 conditions per place. [2024-06-20 15:19:13,693 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 267 selfloop transitions, 197 changer transitions 0/471 dead transitions. [2024-06-20 15:19:13,693 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 373 places, 471 transitions, 7203 flow [2024-06-20 15:19:13,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:19:13,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:19:13,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-20 15:19:13,694 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.596875 [2024-06-20 15:19:13,694 INFO L175 Difference]: Start difference. First operand has 366 places, 449 transitions, 6209 flow. Second operand 8 states and 191 transitions. [2024-06-20 15:19:13,694 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 373 places, 471 transitions, 7203 flow [2024-06-20 15:19:17,227 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 368 places, 471 transitions, 6742 flow, removed 39 selfloop flow, removed 5 redundant places. [2024-06-20 15:19:17,232 INFO L231 Difference]: Finished difference. Result has 369 places, 449 transitions, 6148 flow [2024-06-20 15:19:17,232 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5748, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=449, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=197, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6148, PETRI_PLACES=369, PETRI_TRANSITIONS=449} [2024-06-20 15:19:17,232 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 328 predicate places. [2024-06-20 15:19:17,232 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 449 transitions, 6148 flow [2024-06-20 15:19:17,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-20 15:19:17,232 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:19:17,232 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:19:17,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-20 15:19:17,233 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:19:17,233 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:19:17,233 INFO L85 PathProgramCache]: Analyzing trace with hash -1050407752, now seen corresponding path program 14 times [2024-06-20 15:19:17,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:19:17,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649560855] [2024-06-20 15:19:17,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:19:17,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:19:17,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:19:17,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:19:17,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:19:17,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649560855] [2024-06-20 15:19:17,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649560855] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:19:17,321 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:19:17,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:19:17,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513359092] [2024-06-20 15:19:17,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:19:17,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:19:17,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:19:17,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:19:17,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:19:17,372 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:19:17,373 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 449 transitions, 6148 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-20 15:19:17,373 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:19:17,373 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:19:17,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:19:18,717 INFO L124 PetriNetUnfolderBase]: 4496/7636 cut-off events. [2024-06-20 15:19:18,717 INFO L125 PetriNetUnfolderBase]: For 899721/899721 co-relation queries the response was YES. [2024-06-20 15:19:18,801 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53842 conditions, 7636 events. 4496/7636 cut-off events. For 899721/899721 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 54743 event pairs, 1380 based on Foata normal form. 10/7641 useless extension candidates. Maximal degree in co-relation 53670. Up to 6818 conditions per place. [2024-06-20 15:19:18,825 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 367 selfloop transitions, 96 changer transitions 0/470 dead transitions. [2024-06-20 15:19:18,825 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 470 transitions, 7136 flow [2024-06-20 15:19:18,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:19:18,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:19:18,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 224 transitions. [2024-06-20 15:19:18,826 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.56 [2024-06-20 15:19:18,826 INFO L175 Difference]: Start difference. First operand has 369 places, 449 transitions, 6148 flow. Second operand 10 states and 224 transitions. [2024-06-20 15:19:18,826 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 470 transitions, 7136 flow [2024-06-20 15:19:22,021 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 470 transitions, 6701 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-20 15:19:22,026 INFO L231 Difference]: Finished difference. Result has 371 places, 449 transitions, 5911 flow [2024-06-20 15:19:22,026 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5713, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=449, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=353, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5911, PETRI_PLACES=371, PETRI_TRANSITIONS=449} [2024-06-20 15:19:22,026 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 330 predicate places. [2024-06-20 15:19:22,026 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 449 transitions, 5911 flow [2024-06-20 15:19:22,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-20 15:19:22,027 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:19:22,027 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:19:22,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-20 15:19:22,027 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:19:22,027 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:19:22,027 INFO L85 PathProgramCache]: Analyzing trace with hash -822506602, now seen corresponding path program 15 times [2024-06-20 15:19:22,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:19:22,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122168962] [2024-06-20 15:19:22,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:19:22,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:19:22,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:19:22,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:19:22,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:19:22,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122168962] [2024-06-20 15:19:22,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122168962] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:19:22,115 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:19:22,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:19:22,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930615525] [2024-06-20 15:19:22,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:19:22,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:19:22,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:19:22,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:19:22,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:19:22,151 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:19:22,151 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 449 transitions, 5911 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-20 15:19:22,152 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:19:22,152 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:19:22,152 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:19:23,550 INFO L124 PetriNetUnfolderBase]: 4473/7603 cut-off events. [2024-06-20 15:19:23,550 INFO L125 PetriNetUnfolderBase]: For 862605/862605 co-relation queries the response was YES. [2024-06-20 15:19:23,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52234 conditions, 7603 events. 4473/7603 cut-off events. For 862605/862605 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 54470 event pairs, 1371 based on Foata normal form. 10/7608 useless extension candidates. Maximal degree in co-relation 52061. Up to 6785 conditions per place. [2024-06-20 15:19:23,647 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 369 selfloop transitions, 92 changer transitions 0/468 dead transitions. [2024-06-20 15:19:23,647 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 468 transitions, 6891 flow [2024-06-20 15:19:23,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:19:23,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:19:23,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 186 transitions. [2024-06-20 15:19:23,647 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.58125 [2024-06-20 15:19:23,648 INFO L175 Difference]: Start difference. First operand has 371 places, 449 transitions, 5911 flow. Second operand 8 states and 186 transitions. [2024-06-20 15:19:23,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 468 transitions, 6891 flow [2024-06-20 15:19:27,236 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 468 transitions, 6655 flow, removed 24 selfloop flow, removed 8 redundant places. [2024-06-20 15:19:27,241 INFO L231 Difference]: Finished difference. Result has 371 places, 449 transitions, 5865 flow [2024-06-20 15:19:27,241 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5675, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=449, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=357, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5865, PETRI_PLACES=371, PETRI_TRANSITIONS=449} [2024-06-20 15:19:27,242 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 330 predicate places. [2024-06-20 15:19:27,242 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 449 transitions, 5865 flow [2024-06-20 15:19:27,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-20 15:19:27,242 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:19:27,242 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:19:27,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-20 15:19:27,242 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:19:27,242 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:19:27,242 INFO L85 PathProgramCache]: Analyzing trace with hash -813935722, now seen corresponding path program 16 times [2024-06-20 15:19:27,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:19:27,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902478352] [2024-06-20 15:19:27,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:19:27,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:19:27,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:19:27,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:19:27,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:19:27,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902478352] [2024-06-20 15:19:27,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902478352] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:19:27,326 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:19:27,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:19:27,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237451361] [2024-06-20 15:19:27,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:19:27,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:19:27,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:19:27,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:19:27,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:19:27,365 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:19:27,365 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 449 transitions, 5865 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-20 15:19:27,365 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:19:27,365 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:19:27,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:19:28,701 INFO L124 PetriNetUnfolderBase]: 4443/7545 cut-off events. [2024-06-20 15:19:28,701 INFO L125 PetriNetUnfolderBase]: For 818574/818574 co-relation queries the response was YES. [2024-06-20 15:19:28,786 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50563 conditions, 7545 events. 4443/7545 cut-off events. For 818574/818574 co-relation queries the response was YES. Maximal size of possible extension queue 484. Compared 53897 event pairs, 1341 based on Foata normal form. 10/7550 useless extension candidates. Maximal degree in co-relation 50389. Up to 6053 conditions per place. [2024-06-20 15:19:28,811 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 366 selfloop transitions, 99 changer transitions 2/474 dead transitions. [2024-06-20 15:19:28,811 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 474 transitions, 6889 flow [2024-06-20 15:19:28,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:19:28,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:19:28,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-20 15:19:28,811 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.596875 [2024-06-20 15:19:28,811 INFO L175 Difference]: Start difference. First operand has 371 places, 449 transitions, 5865 flow. Second operand 8 states and 191 transitions. [2024-06-20 15:19:28,811 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 474 transitions, 6889 flow [2024-06-20 15:19:32,416 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 372 places, 474 transitions, 6625 flow, removed 42 selfloop flow, removed 6 redundant places. [2024-06-20 15:19:32,421 INFO L231 Difference]: Finished difference. Result has 373 places, 449 transitions, 5807 flow [2024-06-20 15:19:32,421 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5601, PETRI_DIFFERENCE_MINUEND_PLACES=365, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=449, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=350, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5807, PETRI_PLACES=373, PETRI_TRANSITIONS=449} [2024-06-20 15:19:32,421 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 332 predicate places. [2024-06-20 15:19:32,422 INFO L495 AbstractCegarLoop]: Abstraction has has 373 places, 449 transitions, 5807 flow [2024-06-20 15:19:32,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-20 15:19:32,422 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:19:32,422 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:19:32,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-20 15:19:32,422 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:19:32,422 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:19:32,422 INFO L85 PathProgramCache]: Analyzing trace with hash -636916174, now seen corresponding path program 1 times [2024-06-20 15:19:32,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:19:32,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218392813] [2024-06-20 15:19:32,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:19:32,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:19:32,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:19:32,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:19:32,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:19:32,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218392813] [2024-06-20 15:19:32,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218392813] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:19:32,500 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:19:32,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:19:32,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721273418] [2024-06-20 15:19:32,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:19:32,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:19:32,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:19:32,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:19:32,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:19:32,523 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:19:32,523 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 449 transitions, 5807 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:19:32,523 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:19:32,523 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:19:32,523 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:19:33,815 INFO L124 PetriNetUnfolderBase]: 4451/7563 cut-off events. [2024-06-20 15:19:33,815 INFO L125 PetriNetUnfolderBase]: For 784905/784905 co-relation queries the response was YES. [2024-06-20 15:19:33,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50298 conditions, 7563 events. 4451/7563 cut-off events. For 784905/784905 co-relation queries the response was YES. Maximal size of possible extension queue 485. Compared 54117 event pairs, 1353 based on Foata normal form. 2/7560 useless extension candidates. Maximal degree in co-relation 50123. Up to 6833 conditions per place. [2024-06-20 15:19:33,919 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 385 selfloop transitions, 74 changer transitions 0/466 dead transitions. [2024-06-20 15:19:33,919 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 466 transitions, 6812 flow [2024-06-20 15:19:33,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:19:33,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:19:33,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-06-20 15:19:33,920 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5821428571428572 [2024-06-20 15:19:33,920 INFO L175 Difference]: Start difference. First operand has 373 places, 449 transitions, 5807 flow. Second operand 7 states and 163 transitions. [2024-06-20 15:19:33,920 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 466 transitions, 6812 flow [2024-06-20 15:19:37,522 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 372 places, 466 transitions, 6591 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-20 15:19:37,527 INFO L231 Difference]: Finished difference. Result has 373 places, 451 transitions, 5794 flow [2024-06-20 15:19:37,527 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5586, PETRI_DIFFERENCE_MINUEND_PLACES=366, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=449, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=375, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5794, PETRI_PLACES=373, PETRI_TRANSITIONS=451} [2024-06-20 15:19:37,527 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 332 predicate places. [2024-06-20 15:19:37,527 INFO L495 AbstractCegarLoop]: Abstraction has has 373 places, 451 transitions, 5794 flow [2024-06-20 15:19:37,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:19:37,527 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:19:37,527 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:19:37,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-20 15:19:37,527 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:19:37,528 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:19:37,528 INFO L85 PathProgramCache]: Analyzing trace with hash -636440944, now seen corresponding path program 2 times [2024-06-20 15:19:37,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:19:37,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316515771] [2024-06-20 15:19:37,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:19:37,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:19:37,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:19:37,610 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:19:37,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:19:37,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316515771] [2024-06-20 15:19:37,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316515771] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:19:37,611 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:19:37,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:19:37,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404649837] [2024-06-20 15:19:37,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:19:37,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:19:37,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:19:37,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:19:37,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:19:37,638 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:19:37,639 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 451 transitions, 5794 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:19:37,639 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:19:37,639 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:19:37,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:19:38,904 INFO L124 PetriNetUnfolderBase]: 4500/7624 cut-off events. [2024-06-20 15:19:38,904 INFO L125 PetriNetUnfolderBase]: For 832109/832109 co-relation queries the response was YES. [2024-06-20 15:19:38,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51227 conditions, 7624 events. 4500/7624 cut-off events. For 832109/832109 co-relation queries the response was YES. Maximal size of possible extension queue 491. Compared 54498 event pairs, 1348 based on Foata normal form. 2/7621 useless extension candidates. Maximal degree in co-relation 51051. Up to 6823 conditions per place. [2024-06-20 15:19:39,011 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 390 selfloop transitions, 78 changer transitions 1/476 dead transitions. [2024-06-20 15:19:39,011 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 476 transitions, 7088 flow [2024-06-20 15:19:39,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:19:39,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:19:39,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-20 15:19:39,012 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-20 15:19:39,012 INFO L175 Difference]: Start difference. First operand has 373 places, 451 transitions, 5794 flow. Second operand 7 states and 168 transitions. [2024-06-20 15:19:39,012 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 476 transitions, 7088 flow [2024-06-20 15:19:42,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 374 places, 476 transitions, 6881 flow, removed 31 selfloop flow, removed 5 redundant places. [2024-06-20 15:19:42,672 INFO L231 Difference]: Finished difference. Result has 376 places, 455 transitions, 5848 flow [2024-06-20 15:19:42,672 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5591, PETRI_DIFFERENCE_MINUEND_PLACES=368, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=451, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=373, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5848, PETRI_PLACES=376, PETRI_TRANSITIONS=455} [2024-06-20 15:19:42,672 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 335 predicate places. [2024-06-20 15:19:42,672 INFO L495 AbstractCegarLoop]: Abstraction has has 376 places, 455 transitions, 5848 flow [2024-06-20 15:19:42,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:19:42,673 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:19:42,673 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:19:42,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-20 15:19:42,673 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:19:42,673 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:19:42,673 INFO L85 PathProgramCache]: Analyzing trace with hash -554997262, now seen corresponding path program 17 times [2024-06-20 15:19:42,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:19:42,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688978462] [2024-06-20 15:19:42,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:19:42,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:19:42,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:19:42,753 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:19:42,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:19:42,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688978462] [2024-06-20 15:19:42,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688978462] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:19:42,753 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:19:42,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:19:42,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58761530] [2024-06-20 15:19:42,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:19:42,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:19:42,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:19:42,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:19:42,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:19:42,790 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:19:42,791 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 376 places, 455 transitions, 5848 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-20 15:19:42,791 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:19:42,791 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:19:42,791 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:19:44,221 INFO L124 PetriNetUnfolderBase]: 4386/7429 cut-off events. [2024-06-20 15:19:44,221 INFO L125 PetriNetUnfolderBase]: For 802479/802482 co-relation queries the response was YES. [2024-06-20 15:19:44,300 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45458 conditions, 7429 events. 4386/7429 cut-off events. For 802479/802482 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 53090 event pairs, 1198 based on Foata normal form. 46/7446 useless extension candidates. Maximal degree in co-relation 45280. Up to 6115 conditions per place. [2024-06-20 15:19:44,320 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 294 selfloop transitions, 191 changer transitions 3/495 dead transitions. [2024-06-20 15:19:44,321 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 384 places, 495 transitions, 6942 flow [2024-06-20 15:19:44,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:19:44,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:19:44,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 232 transitions. [2024-06-20 15:19:44,321 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6444444444444445 [2024-06-20 15:19:44,321 INFO L175 Difference]: Start difference. First operand has 376 places, 455 transitions, 5848 flow. Second operand 9 states and 232 transitions. [2024-06-20 15:19:44,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 384 places, 495 transitions, 6942 flow [2024-06-20 15:19:46,540 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 380 places, 495 transitions, 6713 flow, removed 43 selfloop flow, removed 4 redundant places. [2024-06-20 15:19:46,545 INFO L231 Difference]: Finished difference. Result has 381 places, 454 transitions, 6001 flow [2024-06-20 15:19:46,545 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5619, PETRI_DIFFERENCE_MINUEND_PLACES=372, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=455, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=191, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6001, PETRI_PLACES=381, PETRI_TRANSITIONS=454} [2024-06-20 15:19:46,545 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 340 predicate places. [2024-06-20 15:19:46,545 INFO L495 AbstractCegarLoop]: Abstraction has has 381 places, 454 transitions, 6001 flow [2024-06-20 15:19:46,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-20 15:19:46,545 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:19:46,545 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:19:46,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-20 15:19:46,545 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:19:46,546 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:19:46,546 INFO L85 PathProgramCache]: Analyzing trace with hash 1250539718, now seen corresponding path program 18 times [2024-06-20 15:19:46,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:19:46,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612871770] [2024-06-20 15:19:46,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:19:46,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:19:46,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:19:46,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:19:46,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:19:46,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612871770] [2024-06-20 15:19:46,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612871770] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:19:46,632 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:19:46,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:19:46,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477709532] [2024-06-20 15:19:46,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:19:46,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:19:46,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:19:46,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:19:46,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:19:46,664 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:19:46,664 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 381 places, 454 transitions, 6001 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-20 15:19:46,664 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:19:46,664 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:19:46,664 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:19:48,028 INFO L124 PetriNetUnfolderBase]: 4323/7359 cut-off events. [2024-06-20 15:19:48,028 INFO L125 PetriNetUnfolderBase]: For 563189/563189 co-relation queries the response was YES. [2024-06-20 15:19:48,110 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43878 conditions, 7359 events. 4323/7359 cut-off events. For 563189/563189 co-relation queries the response was YES. Maximal size of possible extension queue 484. Compared 52661 event pairs, 1273 based on Foata normal form. 10/7364 useless extension candidates. Maximal degree in co-relation 43699. Up to 6264 conditions per place. [2024-06-20 15:19:48,131 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 293 selfloop transitions, 193 changer transitions 0/493 dead transitions. [2024-06-20 15:19:48,132 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 390 places, 493 transitions, 7083 flow [2024-06-20 15:19:48,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:19:48,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:19:48,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 246 transitions. [2024-06-20 15:19:48,132 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.615 [2024-06-20 15:19:48,132 INFO L175 Difference]: Start difference. First operand has 381 places, 454 transitions, 6001 flow. Second operand 10 states and 246 transitions. [2024-06-20 15:19:48,132 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 390 places, 493 transitions, 7083 flow [2024-06-20 15:19:51,103 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 493 transitions, 6643 flow, removed 26 selfloop flow, removed 9 redundant places. [2024-06-20 15:19:51,108 INFO L231 Difference]: Finished difference. Result has 382 places, 454 transitions, 5963 flow [2024-06-20 15:19:51,109 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5561, PETRI_DIFFERENCE_MINUEND_PLACES=372, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=454, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=193, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5963, PETRI_PLACES=382, PETRI_TRANSITIONS=454} [2024-06-20 15:19:51,109 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 341 predicate places. [2024-06-20 15:19:51,109 INFO L495 AbstractCegarLoop]: Abstraction has has 382 places, 454 transitions, 5963 flow [2024-06-20 15:19:51,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-20 15:19:51,109 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:19:51,109 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:19:51,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-20 15:19:51,109 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:19:51,110 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:19:51,110 INFO L85 PathProgramCache]: Analyzing trace with hash -879845132, now seen corresponding path program 19 times [2024-06-20 15:19:51,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:19:51,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530660371] [2024-06-20 15:19:51,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:19:51,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:19:51,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:19:51,195 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:19:51,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:19:51,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530660371] [2024-06-20 15:19:51,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530660371] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:19:51,196 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:19:51,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:19:51,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658203214] [2024-06-20 15:19:51,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:19:51,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:19:51,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:19:51,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:19:51,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:19:51,235 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:19:51,236 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 382 places, 454 transitions, 5963 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-20 15:19:51,236 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:19:51,236 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:19:51,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:19:52,529 INFO L124 PetriNetUnfolderBase]: 4300/7321 cut-off events. [2024-06-20 15:19:52,529 INFO L125 PetriNetUnfolderBase]: For 492844/492844 co-relation queries the response was YES. [2024-06-20 15:19:52,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42049 conditions, 7321 events. 4300/7321 cut-off events. For 492844/492844 co-relation queries the response was YES. Maximal size of possible extension queue 483. Compared 52317 event pairs, 1259 based on Foata normal form. 10/7326 useless extension candidates. Maximal degree in co-relation 41870. Up to 6237 conditions per place. [2024-06-20 15:19:52,637 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 299 selfloop transitions, 179 changer transitions 0/485 dead transitions. [2024-06-20 15:19:52,637 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 389 places, 485 transitions, 7009 flow [2024-06-20 15:19:52,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:19:52,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:19:52,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 200 transitions. [2024-06-20 15:19:52,638 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-20 15:19:52,638 INFO L175 Difference]: Start difference. First operand has 382 places, 454 transitions, 5963 flow. Second operand 8 states and 200 transitions. [2024-06-20 15:19:52,638 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 389 places, 485 transitions, 7009 flow [2024-06-20 15:19:55,276 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 485 transitions, 6565 flow, removed 24 selfloop flow, removed 11 redundant places. [2024-06-20 15:19:55,281 INFO L231 Difference]: Finished difference. Result has 379 places, 454 transitions, 5890 flow [2024-06-20 15:19:55,281 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5519, PETRI_DIFFERENCE_MINUEND_PLACES=371, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=454, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=179, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5890, PETRI_PLACES=379, PETRI_TRANSITIONS=454} [2024-06-20 15:19:55,281 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 338 predicate places. [2024-06-20 15:19:55,281 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 454 transitions, 5890 flow [2024-06-20 15:19:55,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-20 15:19:55,281 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:19:55,282 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:19:55,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-20 15:19:55,282 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:19:55,282 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:19:55,282 INFO L85 PathProgramCache]: Analyzing trace with hash 1487011748, now seen corresponding path program 20 times [2024-06-20 15:19:55,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:19:55,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867503270] [2024-06-20 15:19:55,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:19:55,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:19:55,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:19:55,366 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:19:55,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:19:55,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867503270] [2024-06-20 15:19:55,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867503270] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:19:55,367 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:19:55,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:19:55,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014604542] [2024-06-20 15:19:55,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:19:55,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:19:55,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:19:55,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:19:55,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:19:55,399 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:19:55,400 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 454 transitions, 5890 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-20 15:19:55,400 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:19:55,400 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:19:55,400 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:19:56,835 INFO L124 PetriNetUnfolderBase]: 4270/7278 cut-off events. [2024-06-20 15:19:56,835 INFO L125 PetriNetUnfolderBase]: For 424825/424825 co-relation queries the response was YES. [2024-06-20 15:19:56,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40182 conditions, 7278 events. 4270/7278 cut-off events. For 424825/424825 co-relation queries the response was YES. Maximal size of possible extension queue 482. Compared 51832 event pairs, 1094 based on Foata normal form. 10/7283 useless extension candidates. Maximal degree in co-relation 40004. Up to 4412 conditions per place. [2024-06-20 15:19:56,940 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 281 selfloop transitions, 201 changer transitions 2/491 dead transitions. [2024-06-20 15:19:56,940 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 491 transitions, 6980 flow [2024-06-20 15:19:56,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:19:56,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:19:56,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 205 transitions. [2024-06-20 15:19:56,941 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.640625 [2024-06-20 15:19:56,941 INFO L175 Difference]: Start difference. First operand has 379 places, 454 transitions, 5890 flow. Second operand 8 states and 205 transitions. [2024-06-20 15:19:56,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 491 transitions, 6980 flow [2024-06-20 15:19:59,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 491 transitions, 6565 flow, removed 23 selfloop flow, removed 8 redundant places. [2024-06-20 15:19:59,830 INFO L231 Difference]: Finished difference. Result has 379 places, 454 transitions, 5895 flow [2024-06-20 15:19:59,830 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5475, PETRI_DIFFERENCE_MINUEND_PLACES=371, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=454, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=201, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=253, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5895, PETRI_PLACES=379, PETRI_TRANSITIONS=454} [2024-06-20 15:19:59,831 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 338 predicate places. [2024-06-20 15:19:59,831 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 454 transitions, 5895 flow [2024-06-20 15:19:59,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-20 15:19:59,831 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:19:59,831 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:19:59,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-20 15:19:59,831 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:19:59,831 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:19:59,832 INFO L85 PathProgramCache]: Analyzing trace with hash -913306356, now seen corresponding path program 3 times [2024-06-20 15:19:59,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:19:59,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421576126] [2024-06-20 15:19:59,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:19:59,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:19:59,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:19:59,906 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:19:59,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:19:59,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421576126] [2024-06-20 15:19:59,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421576126] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:19:59,906 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:19:59,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:19:59,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198905044] [2024-06-20 15:19:59,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:19:59,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:19:59,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:19:59,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:19:59,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:19:59,935 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:19:59,935 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 454 transitions, 5895 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:19:59,936 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:19:59,936 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:19:59,936 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:20:01,173 INFO L124 PetriNetUnfolderBase]: 4311/7299 cut-off events. [2024-06-20 15:20:01,173 INFO L125 PetriNetUnfolderBase]: For 415077/415077 co-relation queries the response was YES. [2024-06-20 15:20:01,254 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41191 conditions, 7299 events. 4311/7299 cut-off events. For 415077/415077 co-relation queries the response was YES. Maximal size of possible extension queue 488. Compared 51848 event pairs, 1219 based on Foata normal form. 2/7291 useless extension candidates. Maximal degree in co-relation 41013. Up to 6360 conditions per place. [2024-06-20 15:20:01,274 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 383 selfloop transitions, 89 changer transitions 0/479 dead transitions. [2024-06-20 15:20:01,274 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 384 places, 479 transitions, 7182 flow [2024-06-20 15:20:01,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:20:01,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:20:01,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 151 transitions. [2024-06-20 15:20:01,274 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6291666666666667 [2024-06-20 15:20:01,274 INFO L175 Difference]: Start difference. First operand has 379 places, 454 transitions, 5895 flow. Second operand 6 states and 151 transitions. [2024-06-20 15:20:01,274 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 384 places, 479 transitions, 7182 flow [2024-06-20 15:20:03,533 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 375 places, 479 transitions, 6694 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-20 15:20:03,538 INFO L231 Difference]: Finished difference. Result has 377 places, 457 transitions, 5702 flow [2024-06-20 15:20:03,538 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5409, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=454, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=365, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5702, PETRI_PLACES=377, PETRI_TRANSITIONS=457} [2024-06-20 15:20:03,538 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 336 predicate places. [2024-06-20 15:20:03,538 INFO L495 AbstractCegarLoop]: Abstraction has has 377 places, 457 transitions, 5702 flow [2024-06-20 15:20:03,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:20:03,538 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:20:03,539 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:20:03,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-20 15:20:03,539 INFO L420 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:20:03,539 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:20:03,539 INFO L85 PathProgramCache]: Analyzing trace with hash 2109215526, now seen corresponding path program 4 times [2024-06-20 15:20:03,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:20:03,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567404608] [2024-06-20 15:20:03,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:20:03,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:20:03,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:20:03,610 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:20:03,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:20:03,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567404608] [2024-06-20 15:20:03,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567404608] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:20:03,611 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:20:03,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:20:03,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380867653] [2024-06-20 15:20:03,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:20:03,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:20:03,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:20:03,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:20:03,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:20:03,633 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:20:03,633 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 377 places, 457 transitions, 5702 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:20:03,633 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:20:03,633 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:20:03,633 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:20:04,868 INFO L124 PetriNetUnfolderBase]: 4299/7319 cut-off events. [2024-06-20 15:20:04,868 INFO L125 PetriNetUnfolderBase]: For 401344/401344 co-relation queries the response was YES. [2024-06-20 15:20:04,949 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40319 conditions, 7319 events. 4299/7319 cut-off events. For 401344/401344 co-relation queries the response was YES. Maximal size of possible extension queue 488. Compared 52281 event pairs, 1261 based on Foata normal form. 2/7316 useless extension candidates. Maximal degree in co-relation 40140. Up to 6591 conditions per place. [2024-06-20 15:20:04,969 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 388 selfloop transitions, 79 changer transitions 0/474 dead transitions. [2024-06-20 15:20:04,969 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 474 transitions, 6678 flow [2024-06-20 15:20:04,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:20:04,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:20:04,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 146 transitions. [2024-06-20 15:20:04,970 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6083333333333333 [2024-06-20 15:20:04,970 INFO L175 Difference]: Start difference. First operand has 377 places, 457 transitions, 5702 flow. Second operand 6 states and 146 transitions. [2024-06-20 15:20:04,970 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 474 transitions, 6678 flow [2024-06-20 15:20:07,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 379 places, 474 transitions, 6468 flow, removed 34 selfloop flow, removed 3 redundant places. [2024-06-20 15:20:07,511 INFO L231 Difference]: Finished difference. Result has 380 places, 457 transitions, 5658 flow [2024-06-20 15:20:07,511 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5492, PETRI_DIFFERENCE_MINUEND_PLACES=374, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=457, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=378, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5658, PETRI_PLACES=380, PETRI_TRANSITIONS=457} [2024-06-20 15:20:07,511 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 339 predicate places. [2024-06-20 15:20:07,511 INFO L495 AbstractCegarLoop]: Abstraction has has 380 places, 457 transitions, 5658 flow [2024-06-20 15:20:07,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:20:07,511 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:20:07,511 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:20:07,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-20 15:20:07,511 INFO L420 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:20:07,512 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:20:07,512 INFO L85 PathProgramCache]: Analyzing trace with hash 535285794, now seen corresponding path program 5 times [2024-06-20 15:20:07,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:20:07,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869533200] [2024-06-20 15:20:07,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:20:07,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:20:07,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:20:07,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:20:07,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:20:07,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869533200] [2024-06-20 15:20:07,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869533200] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:20:07,595 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:20:07,595 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:20:07,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592686785] [2024-06-20 15:20:07,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:20:07,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:20:07,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:20:07,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:20:07,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:20:07,644 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:20:07,644 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 380 places, 457 transitions, 5658 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:20:07,644 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:20:07,644 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:20:07,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:20:08,895 INFO L124 PetriNetUnfolderBase]: 4294/7319 cut-off events. [2024-06-20 15:20:08,895 INFO L125 PetriNetUnfolderBase]: For 401174/401177 co-relation queries the response was YES. [2024-06-20 15:20:08,980 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39481 conditions, 7319 events. 4294/7319 cut-off events. For 401174/401177 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 52091 event pairs, 1053 based on Foata normal form. 10/7321 useless extension candidates. Maximal degree in co-relation 39301. Up to 5438 conditions per place. [2024-06-20 15:20:09,001 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 393 selfloop transitions, 84 changer transitions 0/484 dead transitions. [2024-06-20 15:20:09,002 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 385 places, 484 transitions, 7160 flow [2024-06-20 15:20:09,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:20:09,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:20:09,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-20 15:20:09,002 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6208333333333333 [2024-06-20 15:20:09,002 INFO L175 Difference]: Start difference. First operand has 380 places, 457 transitions, 5658 flow. Second operand 6 states and 149 transitions. [2024-06-20 15:20:09,002 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 385 places, 484 transitions, 7160 flow [2024-06-20 15:20:11,766 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 379 places, 484 transitions, 6915 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-20 15:20:11,770 INFO L231 Difference]: Finished difference. Result has 380 places, 459 transitions, 5645 flow [2024-06-20 15:20:11,770 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5417, PETRI_DIFFERENCE_MINUEND_PLACES=374, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=457, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=374, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5645, PETRI_PLACES=380, PETRI_TRANSITIONS=459} [2024-06-20 15:20:11,771 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 339 predicate places. [2024-06-20 15:20:11,771 INFO L495 AbstractCegarLoop]: Abstraction has has 380 places, 459 transitions, 5645 flow [2024-06-20 15:20:11,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:20:11,771 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:20:11,771 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:20:11,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-20 15:20:11,771 INFO L420 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:20:11,771 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:20:11,771 INFO L85 PathProgramCache]: Analyzing trace with hash -1082989522, now seen corresponding path program 6 times [2024-06-20 15:20:11,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:20:11,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658694350] [2024-06-20 15:20:11,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:20:11,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:20:11,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:20:11,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:20:11,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:20:11,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658694350] [2024-06-20 15:20:11,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658694350] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:20:11,845 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:20:11,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:20:11,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955898558] [2024-06-20 15:20:11,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:20:11,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:20:11,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:20:11,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:20:11,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:20:11,881 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:20:11,881 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 380 places, 459 transitions, 5645 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:20:11,881 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:20:11,881 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:20:11,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:20:13,110 INFO L124 PetriNetUnfolderBase]: 4282/7297 cut-off events. [2024-06-20 15:20:13,110 INFO L125 PetriNetUnfolderBase]: For 358773/358776 co-relation queries the response was YES. [2024-06-20 15:20:13,192 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39340 conditions, 7297 events. 4282/7297 cut-off events. For 358773/358776 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 51950 event pairs, 1033 based on Foata normal form. 4/7293 useless extension candidates. Maximal degree in co-relation 39159. Up to 5430 conditions per place. [2024-06-20 15:20:13,212 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 386 selfloop transitions, 93 changer transitions 0/486 dead transitions. [2024-06-20 15:20:13,213 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 385 places, 486 transitions, 7105 flow [2024-06-20 15:20:13,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:20:13,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:20:13,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-06-20 15:20:13,213 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6375 [2024-06-20 15:20:13,213 INFO L175 Difference]: Start difference. First operand has 380 places, 459 transitions, 5645 flow. Second operand 6 states and 153 transitions. [2024-06-20 15:20:13,213 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 385 places, 486 transitions, 7105 flow [2024-06-20 15:20:15,740 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 382 places, 486 transitions, 6883 flow, removed 35 selfloop flow, removed 3 redundant places. [2024-06-20 15:20:15,745 INFO L231 Difference]: Finished difference. Result has 383 places, 459 transitions, 5614 flow [2024-06-20 15:20:15,745 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5423, PETRI_DIFFERENCE_MINUEND_PLACES=377, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=459, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=366, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5614, PETRI_PLACES=383, PETRI_TRANSITIONS=459} [2024-06-20 15:20:15,745 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 342 predicate places. [2024-06-20 15:20:15,745 INFO L495 AbstractCegarLoop]: Abstraction has has 383 places, 459 transitions, 5614 flow [2024-06-20 15:20:15,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:20:15,745 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:20:15,745 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:20:15,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-20 15:20:15,745 INFO L420 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:20:15,746 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:20:15,746 INFO L85 PathProgramCache]: Analyzing trace with hash -1907598778, now seen corresponding path program 1 times [2024-06-20 15:20:15,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:20:15,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438917190] [2024-06-20 15:20:15,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:20:15,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:20:15,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:20:15,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:20:15,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:20:15,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438917190] [2024-06-20 15:20:15,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438917190] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:20:15,823 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:20:15,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:20:15,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320831605] [2024-06-20 15:20:15,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:20:15,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:20:15,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:20:15,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:20:15,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:20:15,863 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:20:15,864 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 383 places, 459 transitions, 5614 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:20:15,864 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:20:15,864 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:20:15,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:20:17,470 INFO L124 PetriNetUnfolderBase]: 4675/7887 cut-off events. [2024-06-20 15:20:17,470 INFO L125 PetriNetUnfolderBase]: For 804784/804784 co-relation queries the response was YES. [2024-06-20 15:20:17,549 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50486 conditions, 7887 events. 4675/7887 cut-off events. For 804784/804784 co-relation queries the response was YES. Maximal size of possible extension queue 510. Compared 56287 event pairs, 1130 based on Foata normal form. 6/7830 useless extension candidates. Maximal degree in co-relation 50304. Up to 4131 conditions per place. [2024-06-20 15:20:17,570 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 286 selfloop transitions, 219 changer transitions 0/512 dead transitions. [2024-06-20 15:20:17,570 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 390 places, 512 transitions, 7412 flow [2024-06-20 15:20:17,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:20:17,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:20:17,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 213 transitions. [2024-06-20 15:20:17,570 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.665625 [2024-06-20 15:20:17,570 INFO L175 Difference]: Start difference. First operand has 383 places, 459 transitions, 5614 flow. Second operand 8 states and 213 transitions. [2024-06-20 15:20:17,570 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 390 places, 512 transitions, 7412 flow [2024-06-20 15:20:21,672 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 383 places, 512 transitions, 7127 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-20 15:20:21,677 INFO L231 Difference]: Finished difference. Result has 385 places, 463 transitions, 5930 flow [2024-06-20 15:20:21,677 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5329, PETRI_DIFFERENCE_MINUEND_PLACES=376, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=459, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=216, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5930, PETRI_PLACES=385, PETRI_TRANSITIONS=463} [2024-06-20 15:20:21,677 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 344 predicate places. [2024-06-20 15:20:21,677 INFO L495 AbstractCegarLoop]: Abstraction has has 385 places, 463 transitions, 5930 flow [2024-06-20 15:20:21,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:20:21,677 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:20:21,678 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:20:21,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-20 15:20:21,678 INFO L420 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:20:21,678 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:20:21,678 INFO L85 PathProgramCache]: Analyzing trace with hash 916789516, now seen corresponding path program 1 times [2024-06-20 15:20:21,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:20:21,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697264827] [2024-06-20 15:20:21,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:20:21,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:20:21,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:20:21,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:20:21,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:20:21,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697264827] [2024-06-20 15:20:21,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697264827] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:20:21,749 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:20:21,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:20:21,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788146504] [2024-06-20 15:20:21,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:20:21,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:20:21,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:20:21,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:20:21,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:20:21,787 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:20:21,788 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 385 places, 463 transitions, 5930 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:20:21,788 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:20:21,788 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:20:21,788 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:20:23,179 INFO L124 PetriNetUnfolderBase]: 4703/7998 cut-off events. [2024-06-20 15:20:23,180 INFO L125 PetriNetUnfolderBase]: For 820183/820186 co-relation queries the response was YES. [2024-06-20 15:20:23,273 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50733 conditions, 7998 events. 4703/7998 cut-off events. For 820183/820186 co-relation queries the response was YES. Maximal size of possible extension queue 517. Compared 57521 event pairs, 1154 based on Foata normal form. 8/7998 useless extension candidates. Maximal degree in co-relation 50551. Up to 6073 conditions per place. [2024-06-20 15:20:23,297 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 394 selfloop transitions, 96 changer transitions 0/497 dead transitions. [2024-06-20 15:20:23,297 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 391 places, 497 transitions, 7473 flow [2024-06-20 15:20:23,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:20:23,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:20:23,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-20 15:20:23,298 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6142857142857143 [2024-06-20 15:20:23,298 INFO L175 Difference]: Start difference. First operand has 385 places, 463 transitions, 5930 flow. Second operand 7 states and 172 transitions. [2024-06-20 15:20:23,298 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 391 places, 497 transitions, 7473 flow [2024-06-20 15:20:27,106 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 385 places, 497 transitions, 6923 flow, removed 38 selfloop flow, removed 6 redundant places. [2024-06-20 15:20:27,111 INFO L231 Difference]: Finished difference. Result has 387 places, 466 transitions, 5620 flow [2024-06-20 15:20:27,111 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5382, PETRI_DIFFERENCE_MINUEND_PLACES=379, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=463, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=369, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5620, PETRI_PLACES=387, PETRI_TRANSITIONS=466} [2024-06-20 15:20:27,112 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 346 predicate places. [2024-06-20 15:20:27,112 INFO L495 AbstractCegarLoop]: Abstraction has has 387 places, 466 transitions, 5620 flow [2024-06-20 15:20:27,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:20:27,112 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:20:27,112 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:20:27,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-20 15:20:27,112 INFO L420 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:20:27,112 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:20:27,113 INFO L85 PathProgramCache]: Analyzing trace with hash -406605930, now seen corresponding path program 2 times [2024-06-20 15:20:27,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:20:27,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272092967] [2024-06-20 15:20:27,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:20:27,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:20:27,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:20:27,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:20:27,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:20:27,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272092967] [2024-06-20 15:20:27,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272092967] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:20:27,203 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:20:27,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:20:27,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073028712] [2024-06-20 15:20:27,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:20:27,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:20:27,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:20:27,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:20:27,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:20:27,259 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:20:27,259 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 387 places, 466 transitions, 5620 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:20:27,259 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:20:27,259 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:20:27,259 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:20:28,675 INFO L124 PetriNetUnfolderBase]: 4723/8011 cut-off events. [2024-06-20 15:20:28,675 INFO L125 PetriNetUnfolderBase]: For 831224/831227 co-relation queries the response was YES. [2024-06-20 15:20:28,765 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50427 conditions, 8011 events. 4723/8011 cut-off events. For 831224/831227 co-relation queries the response was YES. Maximal size of possible extension queue 518. Compared 57521 event pairs, 1261 based on Foata normal form. 8/8008 useless extension candidates. Maximal degree in co-relation 50245. Up to 6836 conditions per place. [2024-06-20 15:20:28,788 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 403 selfloop transitions, 93 changer transitions 0/503 dead transitions. [2024-06-20 15:20:28,788 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 394 places, 503 transitions, 6745 flow [2024-06-20 15:20:28,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:20:28,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:20:28,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-06-20 15:20:28,789 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.61875 [2024-06-20 15:20:28,789 INFO L175 Difference]: Start difference. First operand has 387 places, 466 transitions, 5620 flow. Second operand 8 states and 198 transitions. [2024-06-20 15:20:28,789 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 394 places, 503 transitions, 6745 flow [2024-06-20 15:20:32,054 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 391 places, 503 transitions, 6567 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-20 15:20:32,059 INFO L231 Difference]: Finished difference. Result has 392 places, 467 transitions, 5651 flow [2024-06-20 15:20:32,060 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5442, PETRI_DIFFERENCE_MINUEND_PLACES=384, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=466, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=373, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5651, PETRI_PLACES=392, PETRI_TRANSITIONS=467} [2024-06-20 15:20:32,060 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 351 predicate places. [2024-06-20 15:20:32,060 INFO L495 AbstractCegarLoop]: Abstraction has has 392 places, 467 transitions, 5651 flow [2024-06-20 15:20:32,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:20:32,060 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:20:32,060 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:20:32,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-20 15:20:32,061 INFO L420 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:20:32,061 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:20:32,061 INFO L85 PathProgramCache]: Analyzing trace with hash 423738160, now seen corresponding path program 2 times [2024-06-20 15:20:32,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:20:32,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077266734] [2024-06-20 15:20:32,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:20:32,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:20:32,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:20:32,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:20:32,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:20:32,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077266734] [2024-06-20 15:20:32,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077266734] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:20:32,133 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:20:32,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:20:32,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307896480] [2024-06-20 15:20:32,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:20:32,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:20:32,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:20:32,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:20:32,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:20:32,181 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:20:32,181 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 392 places, 467 transitions, 5651 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:20:32,181 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:20:32,181 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:20:32,181 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:20:33,740 INFO L124 PetriNetUnfolderBase]: 4825/8196 cut-off events. [2024-06-20 15:20:33,741 INFO L125 PetriNetUnfolderBase]: For 916470/916473 co-relation queries the response was YES. [2024-06-20 15:20:33,825 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52516 conditions, 8196 events. 4825/8196 cut-off events. For 916470/916473 co-relation queries the response was YES. Maximal size of possible extension queue 535. Compared 59147 event pairs, 1210 based on Foata normal form. 8/8196 useless extension candidates. Maximal degree in co-relation 52333. Up to 6161 conditions per place. [2024-06-20 15:20:33,845 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 403 selfloop transitions, 91 changer transitions 0/501 dead transitions. [2024-06-20 15:20:33,845 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 398 places, 501 transitions, 7261 flow [2024-06-20 15:20:33,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:20:33,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:20:33,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2024-06-20 15:20:33,846 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5928571428571429 [2024-06-20 15:20:33,846 INFO L175 Difference]: Start difference. First operand has 392 places, 467 transitions, 5651 flow. Second operand 7 states and 166 transitions. [2024-06-20 15:20:33,846 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 398 places, 501 transitions, 7261 flow [2024-06-20 15:20:37,891 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 391 places, 501 transitions, 7051 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-20 15:20:37,896 INFO L231 Difference]: Finished difference. Result has 393 places, 474 transitions, 5748 flow [2024-06-20 15:20:37,896 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5451, PETRI_DIFFERENCE_MINUEND_PLACES=385, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=467, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=381, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5748, PETRI_PLACES=393, PETRI_TRANSITIONS=474} [2024-06-20 15:20:37,896 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 352 predicate places. [2024-06-20 15:20:37,896 INFO L495 AbstractCegarLoop]: Abstraction has has 393 places, 474 transitions, 5748 flow [2024-06-20 15:20:37,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:20:37,896 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:20:37,896 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:20:37,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-20 15:20:37,896 INFO L420 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:20:37,897 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:20:37,897 INFO L85 PathProgramCache]: Analyzing trace with hash -1730347288, now seen corresponding path program 3 times [2024-06-20 15:20:37,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:20:37,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433016746] [2024-06-20 15:20:37,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:20:37,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:20:37,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:20:37,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:20:37,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:20:37,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433016746] [2024-06-20 15:20:37,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433016746] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:20:37,980 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:20:37,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:20:37,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043223064] [2024-06-20 15:20:37,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:20:37,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:20:37,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:20:37,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:20:37,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:20:38,019 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:20:38,019 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 393 places, 474 transitions, 5748 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:20:38,019 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:20:38,019 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:20:38,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:20:39,521 INFO L124 PetriNetUnfolderBase]: 4878/8272 cut-off events. [2024-06-20 15:20:39,521 INFO L125 PetriNetUnfolderBase]: For 972479/972482 co-relation queries the response was YES. [2024-06-20 15:20:39,625 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53997 conditions, 8272 events. 4878/8272 cut-off events. For 972479/972482 co-relation queries the response was YES. Maximal size of possible extension queue 547. Compared 59776 event pairs, 1292 based on Foata normal form. 8/8269 useless extension candidates. Maximal degree in co-relation 53813. Up to 7004 conditions per place. [2024-06-20 15:20:39,650 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 409 selfloop transitions, 95 changer transitions 0/511 dead transitions. [2024-06-20 15:20:39,651 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 401 places, 511 transitions, 7127 flow [2024-06-20 15:20:39,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:20:39,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:20:39,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 211 transitions. [2024-06-20 15:20:39,651 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5861111111111111 [2024-06-20 15:20:39,651 INFO L175 Difference]: Start difference. First operand has 393 places, 474 transitions, 5748 flow. Second operand 9 states and 211 transitions. [2024-06-20 15:20:39,651 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 401 places, 511 transitions, 7127 flow [2024-06-20 15:20:43,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 399 places, 511 transitions, 6992 flow, removed 15 selfloop flow, removed 2 redundant places. [2024-06-20 15:20:43,776 INFO L231 Difference]: Finished difference. Result has 401 places, 476 transitions, 5861 flow [2024-06-20 15:20:43,776 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5613, PETRI_DIFFERENCE_MINUEND_PLACES=391, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=474, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=379, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5861, PETRI_PLACES=401, PETRI_TRANSITIONS=476} [2024-06-20 15:20:43,776 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 360 predicate places. [2024-06-20 15:20:43,776 INFO L495 AbstractCegarLoop]: Abstraction has has 401 places, 476 transitions, 5861 flow [2024-06-20 15:20:43,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:20:43,776 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:20:43,777 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:20:43,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-20 15:20:43,777 INFO L420 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:20:43,777 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:20:43,777 INFO L85 PathProgramCache]: Analyzing trace with hash -1158322054, now seen corresponding path program 3 times [2024-06-20 15:20:43,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:20:43,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058848852] [2024-06-20 15:20:43,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:20:43,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:20:43,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:20:43,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:20:43,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:20:43,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058848852] [2024-06-20 15:20:43,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058848852] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:20:43,847 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:20:43,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:20:43,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215166575] [2024-06-20 15:20:43,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:20:43,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:20:43,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:20:43,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:20:43,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:20:43,882 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:20:43,882 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 401 places, 476 transitions, 5861 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:20:43,882 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:20:43,882 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:20:43,882 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:20:45,397 INFO L124 PetriNetUnfolderBase]: 4865/8272 cut-off events. [2024-06-20 15:20:45,397 INFO L125 PetriNetUnfolderBase]: For 953465/953468 co-relation queries the response was YES. [2024-06-20 15:20:45,497 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53315 conditions, 8272 events. 4865/8272 cut-off events. For 953465/953468 co-relation queries the response was YES. Maximal size of possible extension queue 545. Compared 59788 event pairs, 1202 based on Foata normal form. 8/8272 useless extension candidates. Maximal degree in co-relation 53129. Up to 6238 conditions per place. [2024-06-20 15:20:45,521 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 409 selfloop transitions, 89 changer transitions 0/505 dead transitions. [2024-06-20 15:20:45,521 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 407 places, 505 transitions, 7391 flow [2024-06-20 15:20:45,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:20:45,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:20:45,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-20 15:20:45,521 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-20 15:20:45,521 INFO L175 Difference]: Start difference. First operand has 401 places, 476 transitions, 5861 flow. Second operand 7 states and 168 transitions. [2024-06-20 15:20:45,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 407 places, 505 transitions, 7391 flow [2024-06-20 15:20:49,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 401 places, 505 transitions, 7196 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-20 15:20:49,947 INFO L231 Difference]: Finished difference. Result has 402 places, 476 transitions, 5848 flow [2024-06-20 15:20:49,947 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5666, PETRI_DIFFERENCE_MINUEND_PLACES=395, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=476, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=387, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5848, PETRI_PLACES=402, PETRI_TRANSITIONS=476} [2024-06-20 15:20:49,947 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 361 predicate places. [2024-06-20 15:20:49,947 INFO L495 AbstractCegarLoop]: Abstraction has has 402 places, 476 transitions, 5848 flow [2024-06-20 15:20:49,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:20:49,947 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:20:49,947 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:20:49,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-20 15:20:49,948 INFO L420 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:20:49,948 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:20:49,948 INFO L85 PathProgramCache]: Analyzing trace with hash -1396672506, now seen corresponding path program 4 times [2024-06-20 15:20:49,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:20:49,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282091554] [2024-06-20 15:20:49,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:20:49,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:20:49,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:20:50,025 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:20:50,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:20:50,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282091554] [2024-06-20 15:20:50,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282091554] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:20:50,026 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:20:50,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:20:50,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372484107] [2024-06-20 15:20:50,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:20:50,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:20:50,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:20:50,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:20:50,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:20:50,075 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:20:50,075 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 402 places, 476 transitions, 5848 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:20:50,075 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:20:50,076 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:20:50,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:20:51,703 INFO L124 PetriNetUnfolderBase]: 5098/8598 cut-off events. [2024-06-20 15:20:51,703 INFO L125 PetriNetUnfolderBase]: For 1232884/1232884 co-relation queries the response was YES. [2024-06-20 15:20:51,799 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60090 conditions, 8598 events. 5098/8598 cut-off events. For 1232884/1232884 co-relation queries the response was YES. Maximal size of possible extension queue 572. Compared 62689 event pairs, 1508 based on Foata normal form. 6/8541 useless extension candidates. Maximal degree in co-relation 59905. Up to 6638 conditions per place. [2024-06-20 15:20:51,823 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 292 selfloop transitions, 224 changer transitions 0/523 dead transitions. [2024-06-20 15:20:51,823 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 409 places, 523 transitions, 7374 flow [2024-06-20 15:20:51,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:20:51,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:20:51,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 210 transitions. [2024-06-20 15:20:51,824 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.65625 [2024-06-20 15:20:51,824 INFO L175 Difference]: Start difference. First operand has 402 places, 476 transitions, 5848 flow. Second operand 8 states and 210 transitions. [2024-06-20 15:20:51,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 409 places, 523 transitions, 7374 flow [2024-06-20 15:20:56,355 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 405 places, 523 transitions, 7203 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-20 15:20:56,360 INFO L231 Difference]: Finished difference. Result has 407 places, 480 transitions, 6267 flow [2024-06-20 15:20:56,360 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5677, PETRI_DIFFERENCE_MINUEND_PLACES=398, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=476, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=221, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=253, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6267, PETRI_PLACES=407, PETRI_TRANSITIONS=480} [2024-06-20 15:20:56,360 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 366 predicate places. [2024-06-20 15:20:56,360 INFO L495 AbstractCegarLoop]: Abstraction has has 407 places, 480 transitions, 6267 flow [2024-06-20 15:20:56,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:20:56,361 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:20:56,361 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:20:56,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-06-20 15:20:56,361 INFO L420 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:20:56,361 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:20:56,361 INFO L85 PathProgramCache]: Analyzing trace with hash 1560026614, now seen corresponding path program 4 times [2024-06-20 15:20:56,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:20:56,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536779236] [2024-06-20 15:20:56,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:20:56,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:20:56,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:20:56,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:20:56,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:20:56,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536779236] [2024-06-20 15:20:56,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536779236] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:20:56,434 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:20:56,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:20:56,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446174823] [2024-06-20 15:20:56,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:20:56,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:20:56,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:20:56,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:20:56,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:20:56,497 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:20:56,498 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 407 places, 480 transitions, 6267 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:20:56,498 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:20:56,498 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:20:56,498 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:20:58,208 INFO L124 PetriNetUnfolderBase]: 5085/8582 cut-off events. [2024-06-20 15:20:58,209 INFO L125 PetriNetUnfolderBase]: For 1222549/1222549 co-relation queries the response was YES. [2024-06-20 15:20:58,302 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59905 conditions, 8582 events. 5085/8582 cut-off events. For 1222549/1222549 co-relation queries the response was YES. Maximal size of possible extension queue 571. Compared 62414 event pairs, 1626 based on Foata normal form. 6/8572 useless extension candidates. Maximal degree in co-relation 59718. Up to 7565 conditions per place. [2024-06-20 15:20:58,324 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 409 selfloop transitions, 90 changer transitions 0/506 dead transitions. [2024-06-20 15:20:58,324 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 413 places, 506 transitions, 7567 flow [2024-06-20 15:20:58,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:20:58,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:20:58,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-20 15:20:58,325 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6071428571428571 [2024-06-20 15:20:58,325 INFO L175 Difference]: Start difference. First operand has 407 places, 480 transitions, 6267 flow. Second operand 7 states and 170 transitions. [2024-06-20 15:20:58,325 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 413 places, 506 transitions, 7567 flow [2024-06-20 15:21:02,840 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 409 places, 506 transitions, 7219 flow, removed 24 selfloop flow, removed 4 redundant places. [2024-06-20 15:21:02,846 INFO L231 Difference]: Finished difference. Result has 410 places, 480 transitions, 6103 flow [2024-06-20 15:21:02,846 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5919, PETRI_DIFFERENCE_MINUEND_PLACES=403, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=480, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=390, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6103, PETRI_PLACES=410, PETRI_TRANSITIONS=480} [2024-06-20 15:21:02,846 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 369 predicate places. [2024-06-20 15:21:02,846 INFO L495 AbstractCegarLoop]: Abstraction has has 410 places, 480 transitions, 6103 flow [2024-06-20 15:21:02,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:21:02,846 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:21:02,846 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:21:02,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-06-20 15:21:02,847 INFO L420 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:21:02,847 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:21:02,847 INFO L85 PathProgramCache]: Analyzing trace with hash 1599837928, now seen corresponding path program 5 times [2024-06-20 15:21:02,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:21:02,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266696465] [2024-06-20 15:21:02,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:21:02,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:21:02,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:21:02,933 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:21:02,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:21:02,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266696465] [2024-06-20 15:21:02,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266696465] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:21:02,934 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:21:02,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:21:02,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678075595] [2024-06-20 15:21:02,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:21:02,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:21:02,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:21:02,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:21:02,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:21:02,995 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:21:02,995 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 410 places, 480 transitions, 6103 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:21:02,995 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:21:02,995 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:21:02,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:21:04,654 INFO L124 PetriNetUnfolderBase]: 5072/8597 cut-off events. [2024-06-20 15:21:04,654 INFO L125 PetriNetUnfolderBase]: For 1198088/1198091 co-relation queries the response was YES. [2024-06-20 15:21:04,757 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59202 conditions, 8597 events. 5072/8597 cut-off events. For 1198088/1198091 co-relation queries the response was YES. Maximal size of possible extension queue 568. Compared 62827 event pairs, 1650 based on Foata normal form. 8/8579 useless extension candidates. Maximal degree in co-relation 59013. Up to 7732 conditions per place. [2024-06-20 15:21:04,784 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 420 selfloop transitions, 85 changer transitions 0/512 dead transitions. [2024-06-20 15:21:04,784 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 417 places, 512 transitions, 7209 flow [2024-06-20 15:21:04,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:21:04,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:21:04,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 195 transitions. [2024-06-20 15:21:04,785 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.609375 [2024-06-20 15:21:04,785 INFO L175 Difference]: Start difference. First operand has 410 places, 480 transitions, 6103 flow. Second operand 8 states and 195 transitions. [2024-06-20 15:21:04,785 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 417 places, 512 transitions, 7209 flow [2024-06-20 15:21:10,378 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 411 places, 512 transitions, 7035 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-20 15:21:10,383 INFO L231 Difference]: Finished difference. Result has 412 places, 480 transitions, 6103 flow [2024-06-20 15:21:10,383 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5929, PETRI_DIFFERENCE_MINUEND_PLACES=404, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=480, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=395, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6103, PETRI_PLACES=412, PETRI_TRANSITIONS=480} [2024-06-20 15:21:10,383 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 371 predicate places. [2024-06-20 15:21:10,383 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 480 transitions, 6103 flow [2024-06-20 15:21:10,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:21:10,384 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:21:10,384 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:21:10,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2024-06-20 15:21:10,384 INFO L420 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:21:10,384 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:21:10,384 INFO L85 PathProgramCache]: Analyzing trace with hash -921321068, now seen corresponding path program 5 times [2024-06-20 15:21:10,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:21:10,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458134070] [2024-06-20 15:21:10,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:21:10,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:21:10,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:21:10,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:21:10,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:21:10,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458134070] [2024-06-20 15:21:10,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458134070] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:21:10,459 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:21:10,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:21:10,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853875482] [2024-06-20 15:21:10,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:21:10,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:21:10,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:21:10,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:21:10,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:21:10,491 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:21:10,492 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 480 transitions, 6103 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:21:10,492 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:21:10,492 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:21:10,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:21:12,131 INFO L124 PetriNetUnfolderBase]: 5059/8581 cut-off events. [2024-06-20 15:21:12,131 INFO L125 PetriNetUnfolderBase]: For 1178188/1178188 co-relation queries the response was YES. [2024-06-20 15:21:12,232 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58524 conditions, 8581 events. 5059/8581 cut-off events. For 1178188/1178188 co-relation queries the response was YES. Maximal size of possible extension queue 566. Compared 62770 event pairs, 1663 based on Foata normal form. 6/8580 useless extension candidates. Maximal degree in co-relation 58334. Up to 7737 conditions per place. [2024-06-20 15:21:12,257 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 415 selfloop transitions, 78 changer transitions 1/501 dead transitions. [2024-06-20 15:21:12,257 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 418 places, 501 transitions, 7161 flow [2024-06-20 15:21:12,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:21:12,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:21:12,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-20 15:21:12,258 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5964285714285714 [2024-06-20 15:21:12,258 INFO L175 Difference]: Start difference. First operand has 412 places, 480 transitions, 6103 flow. Second operand 7 states and 167 transitions. [2024-06-20 15:21:12,258 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 418 places, 501 transitions, 7161 flow [2024-06-20 15:21:17,723 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 412 places, 501 transitions, 6976 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-20 15:21:17,728 INFO L231 Difference]: Finished difference. Result has 414 places, 481 transitions, 6103 flow [2024-06-20 15:21:17,728 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5920, PETRI_DIFFERENCE_MINUEND_PLACES=406, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=480, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=402, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6103, PETRI_PLACES=414, PETRI_TRANSITIONS=481} [2024-06-20 15:21:17,728 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 373 predicate places. [2024-06-20 15:21:17,728 INFO L495 AbstractCegarLoop]: Abstraction has has 414 places, 481 transitions, 6103 flow [2024-06-20 15:21:17,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:21:17,728 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:21:17,728 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:21:17,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2024-06-20 15:21:17,729 INFO L420 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:21:17,729 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:21:17,729 INFO L85 PathProgramCache]: Analyzing trace with hash 1865535208, now seen corresponding path program 6 times [2024-06-20 15:21:17,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:21:17,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643783872] [2024-06-20 15:21:17,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:21:17,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:21:17,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:21:17,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:21:17,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:21:17,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643783872] [2024-06-20 15:21:17,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643783872] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:21:17,815 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:21:17,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:21:17,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748524224] [2024-06-20 15:21:17,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:21:17,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:21:17,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:21:17,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:21:17,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:21:17,866 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:21:17,866 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 414 places, 481 transitions, 6103 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:21:17,866 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:21:17,866 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:21:17,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:21:19,828 INFO L124 PetriNetUnfolderBase]: 5079/8627 cut-off events. [2024-06-20 15:21:19,828 INFO L125 PetriNetUnfolderBase]: For 1196730/1196733 co-relation queries the response was YES. [2024-06-20 15:21:19,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58857 conditions, 8627 events. 5079/8627 cut-off events. For 1196730/1196733 co-relation queries the response was YES. Maximal size of possible extension queue 570. Compared 63201 event pairs, 1664 based on Foata normal form. 8/8618 useless extension candidates. Maximal degree in co-relation 58665. Up to 7783 conditions per place. [2024-06-20 15:21:19,943 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 417 selfloop transitions, 85 changer transitions 1/510 dead transitions. [2024-06-20 15:21:19,943 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 422 places, 510 transitions, 7210 flow [2024-06-20 15:21:19,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:21:19,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:21:19,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 209 transitions. [2024-06-20 15:21:19,943 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5805555555555556 [2024-06-20 15:21:19,943 INFO L175 Difference]: Start difference. First operand has 414 places, 481 transitions, 6103 flow. Second operand 9 states and 209 transitions. [2024-06-20 15:21:19,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 422 places, 510 transitions, 7210 flow [2024-06-20 15:21:24,132 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 418 places, 510 transitions, 7061 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-20 15:21:24,138 INFO L231 Difference]: Finished difference. Result has 419 places, 482 transitions, 6151 flow [2024-06-20 15:21:24,138 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5954, PETRI_DIFFERENCE_MINUEND_PLACES=410, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=481, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=396, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6151, PETRI_PLACES=419, PETRI_TRANSITIONS=482} [2024-06-20 15:21:24,139 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 378 predicate places. [2024-06-20 15:21:24,139 INFO L495 AbstractCegarLoop]: Abstraction has has 419 places, 482 transitions, 6151 flow [2024-06-20 15:21:24,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:21:24,139 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:21:24,139 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:21:24,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2024-06-20 15:21:24,139 INFO L420 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:21:24,139 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:21:24,139 INFO L85 PathProgramCache]: Analyzing trace with hash 1212844164, now seen corresponding path program 6 times [2024-06-20 15:21:24,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:21:24,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719363176] [2024-06-20 15:21:24,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:21:24,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:21:24,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:21:24,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:21:24,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:21:24,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719363176] [2024-06-20 15:21:24,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719363176] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:21:24,215 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:21:24,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:21:24,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421687017] [2024-06-20 15:21:24,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:21:24,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:21:24,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:21:24,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:21:24,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:21:24,258 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:21:24,258 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 419 places, 482 transitions, 6151 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:21:24,258 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:21:24,258 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:21:24,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:21:26,148 INFO L124 PetriNetUnfolderBase]: 5099/8678 cut-off events. [2024-06-20 15:21:26,148 INFO L125 PetriNetUnfolderBase]: For 1219842/1219845 co-relation queries the response was YES. [2024-06-20 15:21:26,243 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59216 conditions, 8678 events. 5099/8678 cut-off events. For 1219842/1219845 co-relation queries the response was YES. Maximal size of possible extension queue 574. Compared 63312 event pairs, 1199 based on Foata normal form. 8/8678 useless extension candidates. Maximal degree in co-relation 59023. Up to 6622 conditions per place. [2024-06-20 15:21:26,263 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 404 selfloop transitions, 96 changer transitions 0/507 dead transitions. [2024-06-20 15:21:26,264 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 424 places, 507 transitions, 7479 flow [2024-06-20 15:21:26,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:21:26,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:21:26,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 146 transitions. [2024-06-20 15:21:26,264 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6083333333333333 [2024-06-20 15:21:26,264 INFO L175 Difference]: Start difference. First operand has 419 places, 482 transitions, 6151 flow. Second operand 6 states and 146 transitions. [2024-06-20 15:21:26,264 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 424 places, 507 transitions, 7479 flow [2024-06-20 15:21:31,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 418 places, 507 transitions, 7305 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-20 15:21:31,618 INFO L231 Difference]: Finished difference. Result has 419 places, 483 transitions, 6194 flow [2024-06-20 15:21:31,618 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5977, PETRI_DIFFERENCE_MINUEND_PLACES=413, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=482, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=387, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6194, PETRI_PLACES=419, PETRI_TRANSITIONS=483} [2024-06-20 15:21:31,618 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 378 predicate places. [2024-06-20 15:21:31,618 INFO L495 AbstractCegarLoop]: Abstraction has has 419 places, 483 transitions, 6194 flow [2024-06-20 15:21:31,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:21:31,619 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:21:31,619 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:21:31,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2024-06-20 15:21:31,619 INFO L420 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:21:31,619 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:21:31,619 INFO L85 PathProgramCache]: Analyzing trace with hash -973388080, now seen corresponding path program 7 times [2024-06-20 15:21:31,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:21:31,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376627466] [2024-06-20 15:21:31,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:21:31,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:21:31,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:21:31,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:21:31,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:21:31,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376627466] [2024-06-20 15:21:31,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376627466] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:21:31,692 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:21:31,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:21:31,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060023523] [2024-06-20 15:21:31,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:21:31,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:21:31,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:21:31,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:21:31,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:21:31,720 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:21:31,720 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 419 places, 483 transitions, 6194 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:21:31,720 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:21:31,720 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:21:31,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:21:33,645 INFO L124 PetriNetUnfolderBase]: 5086/8663 cut-off events. [2024-06-20 15:21:33,645 INFO L125 PetriNetUnfolderBase]: For 1202212/1202215 co-relation queries the response was YES. [2024-06-20 15:21:33,739 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58937 conditions, 8663 events. 5086/8663 cut-off events. For 1202212/1202215 co-relation queries the response was YES. Maximal size of possible extension queue 574. Compared 63290 event pairs, 1193 based on Foata normal form. 8/8663 useless extension candidates. Maximal degree in co-relation 58743. Up to 6616 conditions per place. [2024-06-20 15:21:33,760 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 401 selfloop transitions, 103 changer transitions 0/511 dead transitions. [2024-06-20 15:21:33,761 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 424 places, 511 transitions, 7530 flow [2024-06-20 15:21:33,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:21:33,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:21:33,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-06-20 15:21:33,761 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6375 [2024-06-20 15:21:33,761 INFO L175 Difference]: Start difference. First operand has 419 places, 483 transitions, 6194 flow. Second operand 6 states and 153 transitions. [2024-06-20 15:21:33,761 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 424 places, 511 transitions, 7530 flow [2024-06-20 15:21:39,221 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 418 places, 511 transitions, 7224 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-20 15:21:39,227 INFO L231 Difference]: Finished difference. Result has 419 places, 483 transitions, 6104 flow [2024-06-20 15:21:39,227 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5890, PETRI_DIFFERENCE_MINUEND_PLACES=413, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=483, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=380, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6104, PETRI_PLACES=419, PETRI_TRANSITIONS=483} [2024-06-20 15:21:39,227 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 378 predicate places. [2024-06-20 15:21:39,227 INFO L495 AbstractCegarLoop]: Abstraction has has 419 places, 483 transitions, 6104 flow [2024-06-20 15:21:39,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:21:39,227 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:21:39,228 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:21:39,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2024-06-20 15:21:39,228 INFO L420 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:21:39,228 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:21:39,228 INFO L85 PathProgramCache]: Analyzing trace with hash 448843994, now seen corresponding path program 8 times [2024-06-20 15:21:39,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:21:39,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884440159] [2024-06-20 15:21:39,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:21:39,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:21:39,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:21:39,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:21:39,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:21:39,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884440159] [2024-06-20 15:21:39,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884440159] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:21:39,303 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:21:39,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:21:39,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679572098] [2024-06-20 15:21:39,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:21:39,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:21:39,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:21:39,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:21:39,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:21:39,352 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:21:39,353 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 419 places, 483 transitions, 6104 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:21:39,353 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:21:39,353 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:21:39,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:21:41,342 INFO L124 PetriNetUnfolderBase]: 5073/8576 cut-off events. [2024-06-20 15:21:41,344 INFO L125 PetriNetUnfolderBase]: For 1159913/1159913 co-relation queries the response was YES. [2024-06-20 15:21:41,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57723 conditions, 8576 events. 5073/8576 cut-off events. For 1159913/1159913 co-relation queries the response was YES. Maximal size of possible extension queue 571. Compared 62477 event pairs, 1598 based on Foata normal form. 6/8564 useless extension candidates. Maximal degree in co-relation 57530. Up to 7579 conditions per place. [2024-06-20 15:21:41,455 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 408 selfloop transitions, 91 changer transitions 0/506 dead transitions. [2024-06-20 15:21:41,455 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 424 places, 506 transitions, 7174 flow [2024-06-20 15:21:41,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:21:41,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:21:41,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 151 transitions. [2024-06-20 15:21:41,456 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6291666666666667 [2024-06-20 15:21:41,456 INFO L175 Difference]: Start difference. First operand has 419 places, 483 transitions, 6104 flow. Second operand 6 states and 151 transitions. [2024-06-20 15:21:41,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 424 places, 506 transitions, 7174 flow [2024-06-20 15:21:46,714 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 417 places, 506 transitions, 6931 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-20 15:21:46,719 INFO L231 Difference]: Finished difference. Result has 418 places, 483 transitions, 6051 flow [2024-06-20 15:21:46,719 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5861, PETRI_DIFFERENCE_MINUEND_PLACES=412, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=483, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=392, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6051, PETRI_PLACES=418, PETRI_TRANSITIONS=483} [2024-06-20 15:21:46,719 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 377 predicate places. [2024-06-20 15:21:46,719 INFO L495 AbstractCegarLoop]: Abstraction has has 418 places, 483 transitions, 6051 flow [2024-06-20 15:21:46,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:21:46,720 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:21:46,720 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:21:46,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2024-06-20 15:21:46,720 INFO L420 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:21:46,720 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:21:46,720 INFO L85 PathProgramCache]: Analyzing trace with hash 1311286214, now seen corresponding path program 7 times [2024-06-20 15:21:46,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:21:46,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820887116] [2024-06-20 15:21:46,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:21:46,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:21:46,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:21:46,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:21:46,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:21:46,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820887116] [2024-06-20 15:21:46,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820887116] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:21:46,816 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:21:46,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:21:46,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696938094] [2024-06-20 15:21:46,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:21:46,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:21:46,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:21:46,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:21:46,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:21:46,854 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:21:46,854 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 418 places, 483 transitions, 6051 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:21:46,854 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:21:46,854 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:21:46,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:21:48,786 INFO L124 PetriNetUnfolderBase]: 5101/8677 cut-off events. [2024-06-20 15:21:48,786 INFO L125 PetriNetUnfolderBase]: For 1136435/1136438 co-relation queries the response was YES. [2024-06-20 15:21:48,884 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57462 conditions, 8677 events. 5101/8677 cut-off events. For 1136435/1136438 co-relation queries the response was YES. Maximal size of possible extension queue 575. Compared 63778 event pairs, 1654 based on Foata normal form. 8/8668 useless extension candidates. Maximal degree in co-relation 57270. Up to 7799 conditions per place. [2024-06-20 15:21:48,908 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 410 selfloop transitions, 94 changer transitions 1/512 dead transitions. [2024-06-20 15:21:48,908 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 427 places, 512 transitions, 7194 flow [2024-06-20 15:21:48,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:21:48,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:21:48,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 224 transitions. [2024-06-20 15:21:48,909 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.56 [2024-06-20 15:21:48,909 INFO L175 Difference]: Start difference. First operand has 418 places, 483 transitions, 6051 flow. Second operand 10 states and 224 transitions. [2024-06-20 15:21:48,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 427 places, 512 transitions, 7194 flow [2024-06-20 15:21:54,215 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 419 places, 512 transitions, 6945 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-20 15:21:54,220 INFO L231 Difference]: Finished difference. Result has 421 places, 486 transitions, 6065 flow [2024-06-20 15:21:54,220 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5807, PETRI_DIFFERENCE_MINUEND_PLACES=410, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=483, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=389, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6065, PETRI_PLACES=421, PETRI_TRANSITIONS=486} [2024-06-20 15:21:54,220 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 380 predicate places. [2024-06-20 15:21:54,221 INFO L495 AbstractCegarLoop]: Abstraction has has 421 places, 486 transitions, 6065 flow [2024-06-20 15:21:54,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:21:54,221 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:21:54,221 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:21:54,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2024-06-20 15:21:54,221 INFO L420 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:21:54,221 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:21:54,221 INFO L85 PathProgramCache]: Analyzing trace with hash 934474160, now seen corresponding path program 8 times [2024-06-20 15:21:54,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:21:54,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985279403] [2024-06-20 15:21:54,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:21:54,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:21:54,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:21:54,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:21:54,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:21:54,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985279403] [2024-06-20 15:21:54,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985279403] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:21:54,306 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:21:54,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:21:54,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787668301] [2024-06-20 15:21:54,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:21:54,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:21:54,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:21:54,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:21:54,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:21:54,349 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:21:54,349 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 421 places, 486 transitions, 6065 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:21:54,349 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:21:54,349 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:21:54,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:21:56,372 INFO L124 PetriNetUnfolderBase]: 5191/8795 cut-off events. [2024-06-20 15:21:56,373 INFO L125 PetriNetUnfolderBase]: For 1150240/1150243 co-relation queries the response was YES. [2024-06-20 15:21:56,470 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58787 conditions, 8795 events. 5191/8795 cut-off events. For 1150240/1150243 co-relation queries the response was YES. Maximal size of possible extension queue 585. Compared 64578 event pairs, 1658 based on Foata normal form. 8/8770 useless extension candidates. Maximal degree in co-relation 58595. Up to 7735 conditions per place. [2024-06-20 15:21:56,493 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 415 selfloop transitions, 99 changer transitions 0/521 dead transitions. [2024-06-20 15:21:56,493 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 429 places, 521 transitions, 7526 flow [2024-06-20 15:21:56,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:21:56,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:21:56,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 208 transitions. [2024-06-20 15:21:56,494 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5777777777777777 [2024-06-20 15:21:56,494 INFO L175 Difference]: Start difference. First operand has 421 places, 486 transitions, 6065 flow. Second operand 9 states and 208 transitions. [2024-06-20 15:21:56,494 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 429 places, 521 transitions, 7526 flow [2024-06-20 15:22:01,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 422 places, 521 transitions, 7326 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-20 15:22:01,208 INFO L231 Difference]: Finished difference. Result has 425 places, 492 transitions, 6212 flow [2024-06-20 15:22:01,209 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5865, PETRI_DIFFERENCE_MINUEND_PLACES=414, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=486, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=387, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6212, PETRI_PLACES=425, PETRI_TRANSITIONS=492} [2024-06-20 15:22:01,209 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 384 predicate places. [2024-06-20 15:22:01,209 INFO L495 AbstractCegarLoop]: Abstraction has has 425 places, 492 transitions, 6212 flow [2024-06-20 15:22:01,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:01,209 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:22:01,209 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:22:01,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2024-06-20 15:22:01,209 INFO L420 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:22:01,209 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:22:01,210 INFO L85 PathProgramCache]: Analyzing trace with hash -1875992556, now seen corresponding path program 9 times [2024-06-20 15:22:01,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:22:01,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503099564] [2024-06-20 15:22:01,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:22:01,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:22:01,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:22:01,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:22:01,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:22:01,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503099564] [2024-06-20 15:22:01,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503099564] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:22:01,297 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:22:01,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:22:01,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376028436] [2024-06-20 15:22:01,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:22:01,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:22:01,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:22:01,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:22:01,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:22:01,339 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:22:01,339 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 425 places, 492 transitions, 6212 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:01,339 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:22:01,339 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:22:01,339 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:22:03,499 INFO L124 PetriNetUnfolderBase]: 5571/9467 cut-off events. [2024-06-20 15:22:03,499 INFO L125 PetriNetUnfolderBase]: For 1655248/1655248 co-relation queries the response was YES. [2024-06-20 15:22:03,736 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70546 conditions, 9467 events. 5571/9467 cut-off events. For 1655248/1655248 co-relation queries the response was YES. Maximal size of possible extension queue 641. Compared 70417 event pairs, 1656 based on Foata normal form. 6/9445 useless extension candidates. Maximal degree in co-relation 70351. Up to 7004 conditions per place. [2024-06-20 15:22:03,761 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 302 selfloop transitions, 235 changer transitions 0/544 dead transitions. [2024-06-20 15:22:03,761 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 432 places, 544 transitions, 8066 flow [2024-06-20 15:22:03,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:22:03,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:22:03,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 213 transitions. [2024-06-20 15:22:03,762 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.665625 [2024-06-20 15:22:03,762 INFO L175 Difference]: Start difference. First operand has 425 places, 492 transitions, 6212 flow. Second operand 8 states and 213 transitions. [2024-06-20 15:22:03,762 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 432 places, 544 transitions, 8066 flow [2024-06-20 15:22:09,918 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 427 places, 544 transitions, 7849 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-20 15:22:09,924 INFO L231 Difference]: Finished difference. Result has 428 places, 497 transitions, 6635 flow [2024-06-20 15:22:09,924 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6013, PETRI_DIFFERENCE_MINUEND_PLACES=420, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=492, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=232, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=260, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6635, PETRI_PLACES=428, PETRI_TRANSITIONS=497} [2024-06-20 15:22:09,924 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 387 predicate places. [2024-06-20 15:22:09,924 INFO L495 AbstractCegarLoop]: Abstraction has has 428 places, 497 transitions, 6635 flow [2024-06-20 15:22:09,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:09,924 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:22:09,924 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:22:09,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2024-06-20 15:22:09,925 INFO L420 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:22:09,925 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:22:09,925 INFO L85 PathProgramCache]: Analyzing trace with hash -1205452560, now seen corresponding path program 10 times [2024-06-20 15:22:09,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:22:09,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604363737] [2024-06-20 15:22:09,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:22:09,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:22:09,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:22:10,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:22:10,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:22:10,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604363737] [2024-06-20 15:22:10,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604363737] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:22:10,013 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:22:10,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:22:10,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320378766] [2024-06-20 15:22:10,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:22:10,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:22:10,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:22:10,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:22:10,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:22:10,050 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:22:10,050 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 428 places, 497 transitions, 6635 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:10,050 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:22:10,050 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:22:10,050 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:22:12,229 INFO L124 PetriNetUnfolderBase]: 5558/9452 cut-off events. [2024-06-20 15:22:12,229 INFO L125 PetriNetUnfolderBase]: For 1643520/1643523 co-relation queries the response was YES. [2024-06-20 15:22:12,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70188 conditions, 9452 events. 5558/9452 cut-off events. For 1643520/1643523 co-relation queries the response was YES. Maximal size of possible extension queue 639. Compared 70373 event pairs, 1682 based on Foata normal form. 8/9449 useless extension candidates. Maximal degree in co-relation 69992. Up to 8424 conditions per place. [2024-06-20 15:22:12,366 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 430 selfloop transitions, 95 changer transitions 0/532 dead transitions. [2024-06-20 15:22:12,366 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 435 places, 532 transitions, 7789 flow [2024-06-20 15:22:12,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:22:12,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:22:12,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-06-20 15:22:12,367 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.621875 [2024-06-20 15:22:12,367 INFO L175 Difference]: Start difference. First operand has 428 places, 497 transitions, 6635 flow. Second operand 8 states and 199 transitions. [2024-06-20 15:22:12,367 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 435 places, 532 transitions, 7789 flow [2024-06-20 15:22:17,705 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 432 places, 532 transitions, 7418 flow, removed 36 selfloop flow, removed 3 redundant places. [2024-06-20 15:22:17,710 INFO L231 Difference]: Finished difference. Result has 433 places, 497 transitions, 6458 flow [2024-06-20 15:22:17,710 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6264, PETRI_DIFFERENCE_MINUEND_PLACES=425, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=497, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=402, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6458, PETRI_PLACES=433, PETRI_TRANSITIONS=497} [2024-06-20 15:22:17,710 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 392 predicate places. [2024-06-20 15:22:17,710 INFO L495 AbstractCegarLoop]: Abstraction has has 433 places, 497 transitions, 6458 flow [2024-06-20 15:22:17,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:17,711 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:22:17,711 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:22:17,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159 [2024-06-20 15:22:17,711 INFO L420 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:22:17,711 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:22:17,711 INFO L85 PathProgramCache]: Analyzing trace with hash -1733889486, now seen corresponding path program 11 times [2024-06-20 15:22:17,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:22:17,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831885498] [2024-06-20 15:22:17,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:22:17,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:22:17,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:22:17,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:22:17,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:22:17,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831885498] [2024-06-20 15:22:17,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831885498] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:22:17,791 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:22:17,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:22:17,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086499217] [2024-06-20 15:22:17,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:22:17,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:22:17,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:22:17,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:22:17,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:22:17,845 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:22:17,845 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 433 places, 497 transitions, 6458 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:17,845 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:22:17,845 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:22:17,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:22:19,999 INFO L124 PetriNetUnfolderBase]: 5805/9836 cut-off events. [2024-06-20 15:22:19,999 INFO L125 PetriNetUnfolderBase]: For 1969261/1969261 co-relation queries the response was YES. [2024-06-20 15:22:20,252 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76716 conditions, 9836 events. 5805/9836 cut-off events. For 1969261/1969261 co-relation queries the response was YES. Maximal size of possible extension queue 679. Compared 73711 event pairs, 2078 based on Foata normal form. 8/9817 useless extension candidates. Maximal degree in co-relation 76518. Up to 8194 conditions per place. [2024-06-20 15:22:20,279 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 311 selfloop transitions, 223 changer transitions 0/541 dead transitions. [2024-06-20 15:22:20,279 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 440 places, 541 transitions, 7958 flow [2024-06-20 15:22:20,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:22:20,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:22:20,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 208 transitions. [2024-06-20 15:22:20,280 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.65 [2024-06-20 15:22:20,280 INFO L175 Difference]: Start difference. First operand has 433 places, 497 transitions, 6458 flow. Second operand 8 states and 208 transitions. [2024-06-20 15:22:20,280 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 440 places, 541 transitions, 7958 flow [2024-06-20 15:22:28,109 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 433 places, 541 transitions, 7762 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-20 15:22:28,114 INFO L231 Difference]: Finished difference. Result has 435 places, 500 transitions, 6796 flow [2024-06-20 15:22:28,115 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6262, PETRI_DIFFERENCE_MINUEND_PLACES=426, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=497, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=221, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6796, PETRI_PLACES=435, PETRI_TRANSITIONS=500} [2024-06-20 15:22:28,115 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 394 predicate places. [2024-06-20 15:22:28,115 INFO L495 AbstractCegarLoop]: Abstraction has has 435 places, 500 transitions, 6796 flow [2024-06-20 15:22:28,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:28,115 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:22:28,115 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:22:28,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160 [2024-06-20 15:22:28,115 INFO L420 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:22:28,115 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:22:28,115 INFO L85 PathProgramCache]: Analyzing trace with hash -944076060, now seen corresponding path program 12 times [2024-06-20 15:22:28,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:22:28,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473871186] [2024-06-20 15:22:28,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:22:28,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:22:28,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:22:28,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:22:28,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:22:28,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473871186] [2024-06-20 15:22:28,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473871186] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:22:28,199 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:22:28,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:22:28,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098592240] [2024-06-20 15:22:28,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:22:28,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:22:28,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:22:28,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:22:28,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:22:28,234 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:22:28,234 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 435 places, 500 transitions, 6796 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:28,234 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:22:28,235 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:22:28,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:22:30,579 INFO L124 PetriNetUnfolderBase]: 5833/9882 cut-off events. [2024-06-20 15:22:30,579 INFO L125 PetriNetUnfolderBase]: For 2005030/2005030 co-relation queries the response was YES. [2024-06-20 15:22:30,709 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77755 conditions, 9882 events. 5833/9882 cut-off events. For 2005030/2005030 co-relation queries the response was YES. Maximal size of possible extension queue 684. Compared 74241 event pairs, 2100 based on Foata normal form. 8/9865 useless extension candidates. Maximal degree in co-relation 77555. Up to 8661 conditions per place. [2024-06-20 15:22:30,743 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 304 selfloop transitions, 221 changer transitions 0/532 dead transitions. [2024-06-20 15:22:30,743 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 442 places, 532 transitions, 7961 flow [2024-06-20 15:22:30,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:22:30,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:22:30,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-06-20 15:22:30,744 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.621875 [2024-06-20 15:22:30,744 INFO L175 Difference]: Start difference. First operand has 435 places, 500 transitions, 6796 flow. Second operand 8 states and 199 transitions. [2024-06-20 15:22:30,744 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 442 places, 532 transitions, 7961 flow [2024-06-20 15:22:38,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 438 places, 532 transitions, 7634 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-20 15:22:38,170 INFO L231 Difference]: Finished difference. Result has 439 places, 501 transitions, 6943 flow [2024-06-20 15:22:38,171 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6471, PETRI_DIFFERENCE_MINUEND_PLACES=431, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=500, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=220, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6943, PETRI_PLACES=439, PETRI_TRANSITIONS=501} [2024-06-20 15:22:38,171 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 398 predicate places. [2024-06-20 15:22:38,171 INFO L495 AbstractCegarLoop]: Abstraction has has 439 places, 501 transitions, 6943 flow [2024-06-20 15:22:38,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:38,171 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:22:38,171 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:22:38,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161 [2024-06-20 15:22:38,171 INFO L420 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:22:38,171 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:22:38,171 INFO L85 PathProgramCache]: Analyzing trace with hash -939755280, now seen corresponding path program 13 times [2024-06-20 15:22:38,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:22:38,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660763604] [2024-06-20 15:22:38,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:22:38,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:22:38,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:22:38,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:22:38,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:22:38,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660763604] [2024-06-20 15:22:38,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660763604] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:22:38,258 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:22:38,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:22:38,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668890028] [2024-06-20 15:22:38,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:22:38,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:22:38,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:22:38,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:22:38,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:22:38,301 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:22:38,301 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 439 places, 501 transitions, 6943 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:38,301 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:22:38,301 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:22:38,301 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:22:40,716 INFO L124 PetriNetUnfolderBase]: 5899/9997 cut-off events. [2024-06-20 15:22:40,716 INFO L125 PetriNetUnfolderBase]: For 2081840/2081843 co-relation queries the response was YES. [2024-06-20 15:22:40,836 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79939 conditions, 9997 events. 5899/9997 cut-off events. For 2081840/2081843 co-relation queries the response was YES. Maximal size of possible extension queue 696. Compared 75233 event pairs, 2070 based on Foata normal form. 8/9990 useless extension candidates. Maximal degree in co-relation 79737. Up to 9058 conditions per place. [2024-06-20 15:22:40,864 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 440 selfloop transitions, 89 changer transitions 0/536 dead transitions. [2024-06-20 15:22:40,864 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 447 places, 536 transitions, 8382 flow [2024-06-20 15:22:40,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:22:40,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:22:40,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 214 transitions. [2024-06-20 15:22:40,864 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5944444444444444 [2024-06-20 15:22:40,864 INFO L175 Difference]: Start difference. First operand has 439 places, 501 transitions, 6943 flow. Second operand 9 states and 214 transitions. [2024-06-20 15:22:40,865 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 447 places, 536 transitions, 8382 flow [2024-06-20 15:22:48,658 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 441 places, 536 transitions, 7931 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-20 15:22:48,664 INFO L231 Difference]: Finished difference. Result has 443 places, 503 transitions, 6728 flow [2024-06-20 15:22:48,664 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6492, PETRI_DIFFERENCE_MINUEND_PLACES=433, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=501, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=412, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6728, PETRI_PLACES=443, PETRI_TRANSITIONS=503} [2024-06-20 15:22:48,664 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 402 predicate places. [2024-06-20 15:22:48,664 INFO L495 AbstractCegarLoop]: Abstraction has has 443 places, 503 transitions, 6728 flow [2024-06-20 15:22:48,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:48,664 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:22:48,664 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:22:48,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162 [2024-06-20 15:22:48,664 INFO L420 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:22:48,664 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:22:48,664 INFO L85 PathProgramCache]: Analyzing trace with hash -785983036, now seen corresponding path program 14 times [2024-06-20 15:22:48,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:22:48,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629630043] [2024-06-20 15:22:48,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:22:48,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:22:48,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:22:48,753 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:22:48,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:22:48,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629630043] [2024-06-20 15:22:48,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629630043] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:22:48,753 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:22:48,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:22:48,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140656120] [2024-06-20 15:22:48,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:22:48,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:22:48,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:22:48,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:22:48,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:22:48,787 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:22:48,788 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 443 places, 503 transitions, 6728 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:48,788 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:22:48,788 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:22:48,788 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:22:51,259 INFO L124 PetriNetUnfolderBase]: 5881/9975 cut-off events. [2024-06-20 15:22:51,260 INFO L125 PetriNetUnfolderBase]: For 2071493/2071496 co-relation queries the response was YES. [2024-06-20 15:22:51,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78750 conditions, 9975 events. 5881/9975 cut-off events. For 2071493/2071496 co-relation queries the response was YES. Maximal size of possible extension queue 693. Compared 75142 event pairs, 2074 based on Foata normal form. 10/9974 useless extension candidates. Maximal degree in co-relation 78546. Up to 9086 conditions per place. [2024-06-20 15:22:51,406 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 439 selfloop transitions, 85 changer transitions 0/531 dead transitions. [2024-06-20 15:22:51,406 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 450 places, 531 transitions, 7858 flow [2024-06-20 15:22:51,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:22:51,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:22:51,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-06-20 15:22:51,407 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-20 15:22:51,407 INFO L175 Difference]: Start difference. First operand has 443 places, 503 transitions, 6728 flow. Second operand 8 states and 192 transitions. [2024-06-20 15:22:51,407 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 450 places, 531 transitions, 7858 flow [2024-06-20 15:22:59,303 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 444 places, 531 transitions, 7671 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-20 15:22:59,308 INFO L231 Difference]: Finished difference. Result has 445 places, 503 transitions, 6716 flow [2024-06-20 15:22:59,308 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6541, PETRI_DIFFERENCE_MINUEND_PLACES=437, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=503, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=418, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6716, PETRI_PLACES=445, PETRI_TRANSITIONS=503} [2024-06-20 15:22:59,309 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 404 predicate places. [2024-06-20 15:22:59,309 INFO L495 AbstractCegarLoop]: Abstraction has has 445 places, 503 transitions, 6716 flow [2024-06-20 15:22:59,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:59,309 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:22:59,309 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:22:59,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163 [2024-06-20 15:22:59,309 INFO L420 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:22:59,310 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:22:59,310 INFO L85 PathProgramCache]: Analyzing trace with hash -205189576, now seen corresponding path program 15 times [2024-06-20 15:22:59,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:22:59,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207985434] [2024-06-20 15:22:59,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:22:59,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:22:59,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:22:59,426 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:22:59,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:22:59,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207985434] [2024-06-20 15:22:59,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207985434] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:22:59,426 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:22:59,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:22:59,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265013421] [2024-06-20 15:22:59,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:22:59,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:22:59,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:22:59,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:22:59,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:22:59,472 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:22:59,472 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 445 places, 503 transitions, 6716 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:59,472 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:22:59,472 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:22:59,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:23:01,986 INFO L124 PetriNetUnfolderBase]: 6082/10279 cut-off events. [2024-06-20 15:23:01,986 INFO L125 PetriNetUnfolderBase]: For 2355678/2355678 co-relation queries the response was YES. [2024-06-20 15:23:02,115 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84386 conditions, 10279 events. 6082/10279 cut-off events. For 2355678/2355678 co-relation queries the response was YES. Maximal size of possible extension queue 725. Compared 77616 event pairs, 2197 based on Foata normal form. 8/10260 useless extension candidates. Maximal degree in co-relation 84181. Up to 8633 conditions per place. [2024-06-20 15:23:02,146 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 325 selfloop transitions, 211 changer transitions 0/543 dead transitions. [2024-06-20 15:23:02,146 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 452 places, 543 transitions, 8202 flow [2024-06-20 15:23:02,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:23:02,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:23:02,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 204 transitions. [2024-06-20 15:23:02,147 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6375 [2024-06-20 15:23:02,147 INFO L175 Difference]: Start difference. First operand has 445 places, 503 transitions, 6716 flow. Second operand 8 states and 204 transitions. [2024-06-20 15:23:02,147 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 452 places, 543 transitions, 8202 flow [2024-06-20 15:23:11,788 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 446 places, 543 transitions, 8033 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-20 15:23:11,794 INFO L231 Difference]: Finished difference. Result has 447 places, 505 transitions, 7023 flow [2024-06-20 15:23:11,794 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6547, PETRI_DIFFERENCE_MINUEND_PLACES=439, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=503, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=210, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7023, PETRI_PLACES=447, PETRI_TRANSITIONS=505} [2024-06-20 15:23:11,794 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 406 predicate places. [2024-06-20 15:23:11,794 INFO L495 AbstractCegarLoop]: Abstraction has has 447 places, 505 transitions, 7023 flow [2024-06-20 15:23:11,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:23:11,795 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:23:11,795 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:23:11,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164 [2024-06-20 15:23:11,795 INFO L420 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:23:11,795 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:23:11,795 INFO L85 PathProgramCache]: Analyzing trace with hash -196618696, now seen corresponding path program 16 times [2024-06-20 15:23:11,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:23:11,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631778627] [2024-06-20 15:23:11,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:23:11,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:23:11,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:23:11,877 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:23:11,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:23:11,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631778627] [2024-06-20 15:23:11,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631778627] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:23:11,878 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:23:11,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:23:11,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152600493] [2024-06-20 15:23:11,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:23:11,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:23:11,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:23:11,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:23:11,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:23:11,906 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:23:11,906 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 447 places, 505 transitions, 7023 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:23:11,906 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:23:11,906 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:23:11,906 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:23:14,426 INFO L124 PetriNetUnfolderBase]: 6110/10325 cut-off events. [2024-06-20 15:23:14,426 INFO L125 PetriNetUnfolderBase]: For 2397345/2397345 co-relation queries the response was YES. [2024-06-20 15:23:14,547 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85443 conditions, 10325 events. 6110/10325 cut-off events. For 2397345/2397345 co-relation queries the response was YES. Maximal size of possible extension queue 730. Compared 78042 event pairs, 2219 based on Foata normal form. 8/10308 useless extension candidates. Maximal degree in co-relation 85237. Up to 9100 conditions per place. [2024-06-20 15:23:14,575 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 318 selfloop transitions, 209 changer transitions 0/534 dead transitions. [2024-06-20 15:23:14,575 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 454 places, 534 transitions, 8185 flow [2024-06-20 15:23:14,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:23:14,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:23:14,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 195 transitions. [2024-06-20 15:23:14,576 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.609375 [2024-06-20 15:23:14,576 INFO L175 Difference]: Start difference. First operand has 447 places, 505 transitions, 7023 flow. Second operand 8 states and 195 transitions. [2024-06-20 15:23:14,576 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 454 places, 534 transitions, 8185 flow [2024-06-20 15:23:22,952 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 449 places, 534 transitions, 7858 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-20 15:23:22,957 INFO L231 Difference]: Finished difference. Result has 450 places, 506 transitions, 7147 flow [2024-06-20 15:23:22,957 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6700, PETRI_DIFFERENCE_MINUEND_PLACES=442, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=505, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=208, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7147, PETRI_PLACES=450, PETRI_TRANSITIONS=506} [2024-06-20 15:23:22,957 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 409 predicate places. [2024-06-20 15:23:22,958 INFO L495 AbstractCegarLoop]: Abstraction has has 450 places, 506 transitions, 7147 flow [2024-06-20 15:23:22,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:23:22,958 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:23:22,958 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:23:22,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165 [2024-06-20 15:23:22,958 INFO L420 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:23:22,958 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:23:22,958 INFO L85 PathProgramCache]: Analyzing trace with hash 90268634, now seen corresponding path program 17 times [2024-06-20 15:23:22,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:23:22,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031685943] [2024-06-20 15:23:22,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:23:22,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:23:22,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:23:23,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:23:23,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:23:23,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031685943] [2024-06-20 15:23:23,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031685943] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:23:23,051 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:23:23,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:23:23,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472625855] [2024-06-20 15:23:23,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:23:23,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:23:23,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:23:23,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:23:23,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:23:23,087 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:23:23,087 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 450 places, 506 transitions, 7147 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:23:23,087 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:23:23,087 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:23:23,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:23:25,518 INFO L124 PetriNetUnfolderBase]: 6138/10369 cut-off events. [2024-06-20 15:23:25,519 INFO L125 PetriNetUnfolderBase]: For 2436123/2436123 co-relation queries the response was YES. [2024-06-20 15:23:25,641 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86177 conditions, 10369 events. 6138/10369 cut-off events. For 2436123/2436123 co-relation queries the response was YES. Maximal size of possible extension queue 735. Compared 78425 event pairs, 2223 based on Foata normal form. 8/10352 useless extension candidates. Maximal degree in co-relation 85970. Up to 9144 conditions per place. [2024-06-20 15:23:25,668 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 321 selfloop transitions, 204 changer transitions 0/532 dead transitions. [2024-06-20 15:23:25,668 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 457 places, 532 transitions, 8295 flow [2024-06-20 15:23:25,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:23:25,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:23:25,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-20 15:23:25,669 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.596875 [2024-06-20 15:23:25,669 INFO L175 Difference]: Start difference. First operand has 450 places, 506 transitions, 7147 flow. Second operand 8 states and 191 transitions. [2024-06-20 15:23:25,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 457 places, 532 transitions, 8295 flow [2024-06-20 15:23:32,407 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 451 places, 532 transitions, 7868 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-20 15:23:32,413 INFO L231 Difference]: Finished difference. Result has 452 places, 507 transitions, 7159 flow [2024-06-20 15:23:32,413 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6720, PETRI_DIFFERENCE_MINUEND_PLACES=444, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=506, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=203, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=302, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7159, PETRI_PLACES=452, PETRI_TRANSITIONS=507} [2024-06-20 15:23:32,413 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 411 predicate places. [2024-06-20 15:23:32,413 INFO L495 AbstractCegarLoop]: Abstraction has has 452 places, 507 transitions, 7159 flow [2024-06-20 15:23:32,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:23:32,413 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:23:32,414 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:23:32,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166 [2024-06-20 15:23:32,414 INFO L420 AbstractCegarLoop]: === Iteration 168 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:23:32,414 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:23:32,414 INFO L85 PathProgramCache]: Analyzing trace with hash -481368976, now seen corresponding path program 18 times [2024-06-20 15:23:32,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:23:32,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909177575] [2024-06-20 15:23:32,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:23:32,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:23:32,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:23:32,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:23:32,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:23:32,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909177575] [2024-06-20 15:23:32,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909177575] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:23:32,497 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:23:32,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:23:32,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388842455] [2024-06-20 15:23:32,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:23:32,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:23:32,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:23:32,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:23:32,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:23:32,537 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:23:32,537 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 452 places, 507 transitions, 7159 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:23:32,537 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:23:32,537 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:23:32,537 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:23:34,980 INFO L124 PetriNetUnfolderBase]: 6125/10359 cut-off events. [2024-06-20 15:23:34,980 INFO L125 PetriNetUnfolderBase]: For 2412285/2412288 co-relation queries the response was YES. [2024-06-20 15:23:35,108 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85571 conditions, 10359 events. 6125/10359 cut-off events. For 2412285/2412288 co-relation queries the response was YES. Maximal size of possible extension queue 733. Compared 78400 event pairs, 2170 based on Foata normal form. 8/10352 useless extension candidates. Maximal degree in co-relation 85363. Up to 9345 conditions per place. [2024-06-20 15:23:35,138 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 431 selfloop transitions, 98 changer transitions 0/536 dead transitions. [2024-06-20 15:23:35,138 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 461 places, 536 transitions, 8568 flow [2024-06-20 15:23:35,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:23:35,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:23:35,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 226 transitions. [2024-06-20 15:23:35,139 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.565 [2024-06-20 15:23:35,139 INFO L175 Difference]: Start difference. First operand has 452 places, 507 transitions, 7159 flow. Second operand 10 states and 226 transitions. [2024-06-20 15:23:35,139 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 461 places, 536 transitions, 8568 flow [2024-06-20 15:23:42,089 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 455 places, 536 transitions, 8149 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-20 15:23:42,095 INFO L231 Difference]: Finished difference. Result has 457 places, 508 transitions, 6969 flow [2024-06-20 15:23:42,095 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6740, PETRI_DIFFERENCE_MINUEND_PLACES=446, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=507, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=409, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6969, PETRI_PLACES=457, PETRI_TRANSITIONS=508} [2024-06-20 15:23:42,095 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 416 predicate places. [2024-06-20 15:23:42,095 INFO L495 AbstractCegarLoop]: Abstraction has has 457 places, 508 transitions, 6969 flow [2024-06-20 15:23:42,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:23:42,095 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:23:42,096 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:23:42,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167 [2024-06-20 15:23:42,096 INFO L420 AbstractCegarLoop]: === Iteration 169 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:23:42,096 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:23:42,096 INFO L85 PathProgramCache]: Analyzing trace with hash -1306454798, now seen corresponding path program 19 times [2024-06-20 15:23:42,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:23:42,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302280608] [2024-06-20 15:23:42,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:23:42,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:23:42,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:23:42,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:23:42,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:23:42,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302280608] [2024-06-20 15:23:42,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302280608] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:23:42,180 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:23:42,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:23:42,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121898188] [2024-06-20 15:23:42,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:23:42,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:23:42,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:23:42,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:23:42,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:23:42,221 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:23:42,222 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 457 places, 508 transitions, 6969 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:23:42,222 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:23:42,222 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:23:42,222 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:23:44,806 INFO L124 PetriNetUnfolderBase]: 6107/10337 cut-off events. [2024-06-20 15:23:44,806 INFO L125 PetriNetUnfolderBase]: For 2402232/2402235 co-relation queries the response was YES. [2024-06-20 15:23:44,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84426 conditions, 10337 events. 6107/10337 cut-off events. For 2402232/2402235 co-relation queries the response was YES. Maximal size of possible extension queue 730. Compared 78267 event pairs, 2172 based on Foata normal form. 10/10336 useless extension candidates. Maximal degree in co-relation 84216. Up to 9423 conditions per place. [2024-06-20 15:23:44,962 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 432 selfloop transitions, 93 changer transitions 0/532 dead transitions. [2024-06-20 15:23:44,962 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 466 places, 532 transitions, 8089 flow [2024-06-20 15:23:44,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:23:44,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:23:44,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 222 transitions. [2024-06-20 15:23:44,962 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.555 [2024-06-20 15:23:44,962 INFO L175 Difference]: Start difference. First operand has 457 places, 508 transitions, 6969 flow. Second operand 10 states and 222 transitions. [2024-06-20 15:23:44,962 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 466 places, 532 transitions, 8089 flow [2024-06-20 15:23:51,910 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 458 places, 532 transitions, 7876 flow, removed 11 selfloop flow, removed 8 redundant places. [2024-06-20 15:23:51,915 INFO L231 Difference]: Finished difference. Result has 459 places, 508 transitions, 6947 flow [2024-06-20 15:23:51,915 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6756, PETRI_DIFFERENCE_MINUEND_PLACES=449, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=508, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=415, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6947, PETRI_PLACES=459, PETRI_TRANSITIONS=508} [2024-06-20 15:23:51,916 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 418 predicate places. [2024-06-20 15:23:51,916 INFO L495 AbstractCegarLoop]: Abstraction has has 459 places, 508 transitions, 6947 flow [2024-06-20 15:23:51,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:23:51,916 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:23:51,916 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:23:51,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable168 [2024-06-20 15:23:51,916 INFO L420 AbstractCegarLoop]: === Iteration 170 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:23:51,917 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:23:51,917 INFO L85 PathProgramCache]: Analyzing trace with hash -1301092418, now seen corresponding path program 20 times [2024-06-20 15:23:51,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:23:51,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547999980] [2024-06-20 15:23:51,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:23:51,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:23:51,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:23:52,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:23:52,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:23:52,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547999980] [2024-06-20 15:23:52,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547999980] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:23:52,004 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:23:52,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:23:52,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722501337] [2024-06-20 15:23:52,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:23:52,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:23:52,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:23:52,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:23:52,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:23:52,036 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:23:52,036 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 459 places, 508 transitions, 6947 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:23:52,036 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:23:52,036 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:23:52,036 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:23:54,595 INFO L124 PetriNetUnfolderBase]: 6089/10311 cut-off events. [2024-06-20 15:23:54,595 INFO L125 PetriNetUnfolderBase]: For 2375569/2375572 co-relation queries the response was YES. [2024-06-20 15:23:54,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83396 conditions, 10311 events. 6089/10311 cut-off events. For 2375569/2375572 co-relation queries the response was YES. Maximal size of possible extension queue 727. Compared 78128 event pairs, 2164 based on Foata normal form. 10/10310 useless extension candidates. Maximal degree in co-relation 83186. Up to 9397 conditions per place. [2024-06-20 15:23:54,758 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 435 selfloop transitions, 88 changer transitions 0/530 dead transitions. [2024-06-20 15:23:54,758 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 466 places, 530 transitions, 8059 flow [2024-06-20 15:23:54,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:23:54,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:23:54,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 185 transitions. [2024-06-20 15:23:54,759 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.578125 [2024-06-20 15:23:54,759 INFO L175 Difference]: Start difference. First operand has 459 places, 508 transitions, 6947 flow. Second operand 8 states and 185 transitions. [2024-06-20 15:23:54,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 466 places, 530 transitions, 8059 flow [2024-06-20 15:24:03,078 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 458 places, 530 transitions, 7858 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-20 15:24:03,083 INFO L231 Difference]: Finished difference. Result has 459 places, 508 transitions, 6927 flow [2024-06-20 15:24:03,083 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6746, PETRI_DIFFERENCE_MINUEND_PLACES=451, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=508, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=420, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6927, PETRI_PLACES=459, PETRI_TRANSITIONS=508} [2024-06-20 15:24:03,083 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 418 predicate places. [2024-06-20 15:24:03,084 INFO L495 AbstractCegarLoop]: Abstraction has has 459 places, 508 transitions, 6927 flow [2024-06-20 15:24:03,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:24:03,084 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:24:03,084 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:24:03,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable169 [2024-06-20 15:24:03,084 INFO L420 AbstractCegarLoop]: === Iteration 171 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:24:03,084 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:24:03,084 INFO L85 PathProgramCache]: Analyzing trace with hash -668800480, now seen corresponding path program 1 times [2024-06-20 15:24:03,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:24:03,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983111082] [2024-06-20 15:24:03,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:24:03,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:24:03,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:24:03,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:24:03,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:24:03,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983111082] [2024-06-20 15:24:03,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983111082] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:24:03,161 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:24:03,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:24:03,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256186629] [2024-06-20 15:24:03,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:24:03,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:24:03,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:24:03,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:24:03,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:24:03,195 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:24:03,195 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 459 places, 508 transitions, 6927 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:24:03,195 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:24:03,195 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:24:03,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:24:05,834 INFO L124 PetriNetUnfolderBase]: 6256/10545 cut-off events. [2024-06-20 15:24:05,834 INFO L125 PetriNetUnfolderBase]: For 2641314/2641314 co-relation queries the response was YES. [2024-06-20 15:24:05,963 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88568 conditions, 10545 events. 6256/10545 cut-off events. For 2641314/2641314 co-relation queries the response was YES. Maximal size of possible extension queue 753. Compared 79970 event pairs, 2106 based on Foata normal form. 6/10492 useless extension candidates. Maximal degree in co-relation 88357. Up to 7437 conditions per place. [2024-06-20 15:24:05,993 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 314 selfloop transitions, 233 changer transitions 0/554 dead transitions. [2024-06-20 15:24:05,993 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 466 places, 554 transitions, 8745 flow [2024-06-20 15:24:05,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:24:05,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:24:05,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 208 transitions. [2024-06-20 15:24:05,994 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.65 [2024-06-20 15:24:05,994 INFO L175 Difference]: Start difference. First operand has 459 places, 508 transitions, 6927 flow. Second operand 8 states and 208 transitions. [2024-06-20 15:24:05,994 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 466 places, 554 transitions, 8745 flow [2024-06-20 15:24:14,799 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 460 places, 554 transitions, 8570 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-20 15:24:14,805 INFO L231 Difference]: Finished difference. Result has 461 places, 510 transitions, 7292 flow [2024-06-20 15:24:14,805 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6752, PETRI_DIFFERENCE_MINUEND_PLACES=453, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=508, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=232, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7292, PETRI_PLACES=461, PETRI_TRANSITIONS=510} [2024-06-20 15:24:14,805 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 420 predicate places. [2024-06-20 15:24:14,805 INFO L495 AbstractCegarLoop]: Abstraction has has 461 places, 510 transitions, 7292 flow [2024-06-20 15:24:14,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:24:14,805 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:24:14,805 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:24:14,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170 [2024-06-20 15:24:14,805 INFO L420 AbstractCegarLoop]: === Iteration 172 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:24:14,805 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:24:14,805 INFO L85 PathProgramCache]: Analyzing trace with hash -668501950, now seen corresponding path program 2 times [2024-06-20 15:24:14,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:24:14,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191404777] [2024-06-20 15:24:14,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:24:14,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:24:14,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:24:14,876 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:24:14,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:24:14,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191404777] [2024-06-20 15:24:14,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191404777] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:24:14,877 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:24:14,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:24:14,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739135124] [2024-06-20 15:24:14,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:24:14,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:24:14,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:24:14,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:24:14,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:24:14,914 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:24:14,914 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 461 places, 510 transitions, 7292 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:24:14,914 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:24:14,914 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:24:14,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:24:17,472 INFO L124 PetriNetUnfolderBase]: 6276/10570 cut-off events. [2024-06-20 15:24:17,472 INFO L125 PetriNetUnfolderBase]: For 2688107/2688107 co-relation queries the response was YES. [2024-06-20 15:24:17,603 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89927 conditions, 10570 events. 6276/10570 cut-off events. For 2688107/2688107 co-relation queries the response was YES. Maximal size of possible extension queue 757. Compared 80103 event pairs, 2161 based on Foata normal form. 6/10517 useless extension candidates. Maximal degree in co-relation 89715. Up to 7449 conditions per place. [2024-06-20 15:24:17,633 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 314 selfloop transitions, 228 changer transitions 0/549 dead transitions. [2024-06-20 15:24:17,634 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 468 places, 549 transitions, 8796 flow [2024-06-20 15:24:17,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:24:17,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:24:17,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-06-20 15:24:17,634 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.63125 [2024-06-20 15:24:17,634 INFO L175 Difference]: Start difference. First operand has 461 places, 510 transitions, 7292 flow. Second operand 8 states and 202 transitions. [2024-06-20 15:24:17,634 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 468 places, 549 transitions, 8796 flow [2024-06-20 15:24:25,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 464 places, 549 transitions, 8396 flow, removed 35 selfloop flow, removed 4 redundant places. [2024-06-20 15:24:25,462 INFO L231 Difference]: Finished difference. Result has 465 places, 511 transitions, 7389 flow [2024-06-20 15:24:25,463 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6908, PETRI_DIFFERENCE_MINUEND_PLACES=457, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=510, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=227, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=283, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7389, PETRI_PLACES=465, PETRI_TRANSITIONS=511} [2024-06-20 15:24:25,463 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 424 predicate places. [2024-06-20 15:24:25,463 INFO L495 AbstractCegarLoop]: Abstraction has has 465 places, 511 transitions, 7389 flow [2024-06-20 15:24:25,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:24:25,463 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:24:25,463 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:24:25,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171 [2024-06-20 15:24:25,463 INFO L420 AbstractCegarLoop]: === Iteration 173 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:24:25,463 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:24:25,463 INFO L85 PathProgramCache]: Analyzing trace with hash -666628000, now seen corresponding path program 3 times [2024-06-20 15:24:25,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:24:25,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102728915] [2024-06-20 15:24:25,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:24:25,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:24:25,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:24:25,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:24:25,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:24:25,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102728915] [2024-06-20 15:24:25,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102728915] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:24:25,542 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:24:25,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:24:25,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940107822] [2024-06-20 15:24:25,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:24:25,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:24:25,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:24:25,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:24:25,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:24:25,595 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:24:25,595 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 465 places, 511 transitions, 7389 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:24:25,595 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:24:25,595 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:24:25,595 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:24:28,258 INFO L124 PetriNetUnfolderBase]: 6296/10647 cut-off events. [2024-06-20 15:24:28,258 INFO L125 PetriNetUnfolderBase]: For 2724615/2724615 co-relation queries the response was YES. [2024-06-20 15:24:28,397 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90722 conditions, 10647 events. 6296/10647 cut-off events. For 2724615/2724615 co-relation queries the response was YES. Maximal size of possible extension queue 761. Compared 81202 event pairs, 2309 based on Foata normal form. 6/10624 useless extension candidates. Maximal degree in co-relation 90508. Up to 9280 conditions per place. [2024-06-20 15:24:28,426 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 324 selfloop transitions, 209 changer transitions 0/540 dead transitions. [2024-06-20 15:24:28,426 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 472 places, 540 transitions, 8563 flow [2024-06-20 15:24:28,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:24:28,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:24:28,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 193 transitions. [2024-06-20 15:24:28,427 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.603125 [2024-06-20 15:24:28,427 INFO L175 Difference]: Start difference. First operand has 465 places, 511 transitions, 7389 flow. Second operand 8 states and 193 transitions. [2024-06-20 15:24:28,427 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 472 places, 540 transitions, 8563 flow [2024-06-20 15:24:38,244 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 467 places, 540 transitions, 8153 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-20 15:24:38,250 INFO L231 Difference]: Finished difference. Result has 468 places, 512 transitions, 7426 flow [2024-06-20 15:24:38,250 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6980, PETRI_DIFFERENCE_MINUEND_PLACES=460, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=511, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=208, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=302, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7426, PETRI_PLACES=468, PETRI_TRANSITIONS=512} [2024-06-20 15:24:38,250 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 427 predicate places. [2024-06-20 15:24:38,250 INFO L495 AbstractCegarLoop]: Abstraction has has 468 places, 512 transitions, 7426 flow [2024-06-20 15:24:38,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:24:38,250 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:24:38,250 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:24:38,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172 [2024-06-20 15:24:38,251 INFO L420 AbstractCegarLoop]: === Iteration 174 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:24:38,251 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:24:38,251 INFO L85 PathProgramCache]: Analyzing trace with hash -630457190, now seen corresponding path program 4 times [2024-06-20 15:24:38,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:24:38,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582559475] [2024-06-20 15:24:38,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:24:38,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:24:38,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:24:38,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:24:38,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:24:38,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582559475] [2024-06-20 15:24:38,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582559475] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:24:38,334 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:24:38,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:24:38,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235908134] [2024-06-20 15:24:38,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:24:38,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:24:38,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:24:38,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:24:38,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:24:38,395 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:24:38,396 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 468 places, 512 transitions, 7426 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:24:38,396 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:24:38,396 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:24:38,396 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:24:41,116 INFO L124 PetriNetUnfolderBase]: 6283/10629 cut-off events. [2024-06-20 15:24:41,116 INFO L125 PetriNetUnfolderBase]: For 2714939/2714942 co-relation queries the response was YES. [2024-06-20 15:24:41,252 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89911 conditions, 10629 events. 6283/10629 cut-off events. For 2714939/2714942 co-relation queries the response was YES. Maximal size of possible extension queue 759. Compared 80991 event pairs, 2254 based on Foata normal form. 8/10618 useless extension candidates. Maximal degree in co-relation 89696. Up to 9553 conditions per place. [2024-06-20 15:24:41,424 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 436 selfloop transitions, 94 changer transitions 0/537 dead transitions. [2024-06-20 15:24:41,424 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 475 places, 537 transitions, 8564 flow [2024-06-20 15:24:41,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:24:41,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:24:41,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 187 transitions. [2024-06-20 15:24:41,424 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.584375 [2024-06-20 15:24:41,425 INFO L175 Difference]: Start difference. First operand has 468 places, 512 transitions, 7426 flow. Second operand 8 states and 187 transitions. [2024-06-20 15:24:41,425 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 475 places, 537 transitions, 8564 flow [2024-06-20 15:24:51,028 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 469 places, 537 transitions, 8127 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-20 15:24:51,033 INFO L231 Difference]: Finished difference. Result has 470 places, 512 transitions, 7183 flow [2024-06-20 15:24:51,034 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6989, PETRI_DIFFERENCE_MINUEND_PLACES=462, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=512, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=418, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7183, PETRI_PLACES=470, PETRI_TRANSITIONS=512} [2024-06-20 15:24:51,034 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 429 predicate places. [2024-06-20 15:24:51,034 INFO L495 AbstractCegarLoop]: Abstraction has has 470 places, 512 transitions, 7183 flow [2024-06-20 15:24:51,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:24:51,034 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:24:51,034 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:24:51,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173 [2024-06-20 15:24:51,034 INFO L420 AbstractCegarLoop]: === Iteration 175 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:24:51,034 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:24:51,034 INFO L85 PathProgramCache]: Analyzing trace with hash 1298619610, now seen corresponding path program 21 times [2024-06-20 15:24:51,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:24:51,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813515699] [2024-06-20 15:24:51,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:24:51,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:24:51,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:24:51,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:24:51,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:24:51,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813515699] [2024-06-20 15:24:51,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813515699] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:24:51,113 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:24:51,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:24:51,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858329144] [2024-06-20 15:24:51,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:24:51,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:24:51,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:24:51,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:24:51,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:24:51,158 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:24:51,158 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 470 places, 512 transitions, 7183 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:24:51,158 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:24:51,158 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:24:51,158 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:24:53,851 INFO L124 PetriNetUnfolderBase]: 6311/10708 cut-off events. [2024-06-20 15:24:53,851 INFO L125 PetriNetUnfolderBase]: For 2774192/2774195 co-relation queries the response was YES. [2024-06-20 15:24:53,989 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90130 conditions, 10708 events. 6311/10708 cut-off events. For 2774192/2774195 co-relation queries the response was YES. Maximal size of possible extension queue 764. Compared 81978 event pairs, 2326 based on Foata normal form. 10/10710 useless extension candidates. Maximal degree in co-relation 89914. Up to 9048 conditions per place. [2024-06-20 15:24:54,020 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 363 selfloop transitions, 178 changer transitions 0/548 dead transitions. [2024-06-20 15:24:54,020 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 477 places, 548 transitions, 8669 flow [2024-06-20 15:24:54,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:24:54,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:24:54,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-06-20 15:24:54,021 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.61875 [2024-06-20 15:24:54,021 INFO L175 Difference]: Start difference. First operand has 470 places, 512 transitions, 7183 flow. Second operand 8 states and 198 transitions. [2024-06-20 15:24:54,021 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 477 places, 548 transitions, 8669 flow [2024-06-20 15:25:02,517 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 470 places, 548 transitions, 8451 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-20 15:25:02,523 INFO L231 Difference]: Finished difference. Result has 471 places, 513 transitions, 7351 flow [2024-06-20 15:25:02,523 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6965, PETRI_DIFFERENCE_MINUEND_PLACES=463, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=512, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=177, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=335, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7351, PETRI_PLACES=471, PETRI_TRANSITIONS=513} [2024-06-20 15:25:02,523 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 430 predicate places. [2024-06-20 15:25:02,524 INFO L495 AbstractCegarLoop]: Abstraction has has 471 places, 513 transitions, 7351 flow [2024-06-20 15:25:02,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:02,524 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:25:02,524 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:25:02,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174 [2024-06-20 15:25:02,524 INFO L420 AbstractCegarLoop]: === Iteration 176 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:25:02,524 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:25:02,525 INFO L85 PathProgramCache]: Analyzing trace with hash 1584246790, now seen corresponding path program 22 times [2024-06-20 15:25:02,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:25:02,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620350783] [2024-06-20 15:25:02,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:25:02,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:25:02,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:25:02,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:25:02,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:25:02,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620350783] [2024-06-20 15:25:02,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620350783] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:25:02,606 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:25:02,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:25:02,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264225483] [2024-06-20 15:25:02,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:25:02,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:25:02,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:25:02,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:25:02,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:25:02,638 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:25:02,638 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 471 places, 513 transitions, 7351 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:02,638 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:25:02,638 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:25:02,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:25:05,367 INFO L124 PetriNetUnfolderBase]: 6339/10752 cut-off events. [2024-06-20 15:25:05,368 INFO L125 PetriNetUnfolderBase]: For 2817636/2817639 co-relation queries the response was YES. [2024-06-20 15:25:05,509 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90961 conditions, 10752 events. 6339/10752 cut-off events. For 2817636/2817639 co-relation queries the response was YES. Maximal size of possible extension queue 769. Compared 82372 event pairs, 2346 based on Foata normal form. 10/10754 useless extension candidates. Maximal degree in co-relation 90744. Up to 9475 conditions per place. [2024-06-20 15:25:05,539 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 355 selfloop transitions, 177 changer transitions 0/539 dead transitions. [2024-06-20 15:25:05,539 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 478 places, 539 transitions, 8517 flow [2024-06-20 15:25:05,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:25:05,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:25:05,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 189 transitions. [2024-06-20 15:25:05,540 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.590625 [2024-06-20 15:25:05,540 INFO L175 Difference]: Start difference. First operand has 471 places, 513 transitions, 7351 flow. Second operand 8 states and 189 transitions. [2024-06-20 15:25:05,540 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 478 places, 539 transitions, 8517 flow [2024-06-20 15:25:15,022 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 470 places, 539 transitions, 7826 flow, removed 17 selfloop flow, removed 8 redundant places. [2024-06-20 15:25:15,028 INFO L231 Difference]: Finished difference. Result has 471 places, 514 transitions, 7049 flow [2024-06-20 15:25:15,028 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6670, PETRI_DIFFERENCE_MINUEND_PLACES=463, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=513, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=176, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=336, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7049, PETRI_PLACES=471, PETRI_TRANSITIONS=514} [2024-06-20 15:25:15,028 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 430 predicate places. [2024-06-20 15:25:15,028 INFO L495 AbstractCegarLoop]: Abstraction has has 471 places, 514 transitions, 7049 flow [2024-06-20 15:25:15,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:15,029 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:25:15,029 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:25:15,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175 [2024-06-20 15:25:15,029 INFO L420 AbstractCegarLoop]: === Iteration 177 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:25:15,029 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:25:15,029 INFO L85 PathProgramCache]: Analyzing trace with hash 1594077820, now seen corresponding path program 23 times [2024-06-20 15:25:15,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:25:15,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914938854] [2024-06-20 15:25:15,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:25:15,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:25:15,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:25:15,111 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:25:15,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:25:15,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914938854] [2024-06-20 15:25:15,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914938854] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:25:15,111 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:25:15,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:25:15,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978239861] [2024-06-20 15:25:15,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:25:15,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:25:15,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:25:15,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:25:15,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:25:15,142 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:25:15,143 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 471 places, 514 transitions, 7049 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:15,143 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:25:15,143 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:25:15,143 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:25:17,902 INFO L124 PetriNetUnfolderBase]: 6367/10796 cut-off events. [2024-06-20 15:25:17,902 INFO L125 PetriNetUnfolderBase]: For 2856298/2856301 co-relation queries the response was YES. [2024-06-20 15:25:18,036 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90159 conditions, 10796 events. 6367/10796 cut-off events. For 2856298/2856301 co-relation queries the response was YES. Maximal size of possible extension queue 774. Compared 82715 event pairs, 2350 based on Foata normal form. 10/10798 useless extension candidates. Maximal degree in co-relation 89943. Up to 9519 conditions per place. [2024-06-20 15:25:18,066 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 356 selfloop transitions, 174 changer transitions 0/537 dead transitions. [2024-06-20 15:25:18,066 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 478 places, 537 transitions, 8195 flow [2024-06-20 15:25:18,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:25:18,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:25:18,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 186 transitions. [2024-06-20 15:25:18,067 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.58125 [2024-06-20 15:25:18,067 INFO L175 Difference]: Start difference. First operand has 471 places, 514 transitions, 7049 flow. Second operand 8 states and 186 transitions. [2024-06-20 15:25:18,067 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 478 places, 537 transitions, 8195 flow [2024-06-20 15:25:26,404 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 472 places, 537 transitions, 7834 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-20 15:25:26,410 INFO L231 Difference]: Finished difference. Result has 473 places, 515 transitions, 7063 flow [2024-06-20 15:25:26,410 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6688, PETRI_DIFFERENCE_MINUEND_PLACES=465, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=514, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=173, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7063, PETRI_PLACES=473, PETRI_TRANSITIONS=515} [2024-06-20 15:25:26,410 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 432 predicate places. [2024-06-20 15:25:26,410 INFO L495 AbstractCegarLoop]: Abstraction has has 473 places, 515 transitions, 7063 flow [2024-06-20 15:25:26,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:26,410 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:25:26,410 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:25:26,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176 [2024-06-20 15:25:26,410 INFO L420 AbstractCegarLoop]: === Iteration 178 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:25:26,411 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:25:26,411 INFO L85 PathProgramCache]: Analyzing trace with hash -1510736678, now seen corresponding path program 24 times [2024-06-20 15:25:26,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:25:26,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542575630] [2024-06-20 15:25:26,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:25:26,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:25:26,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:25:26,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:25:26,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:25:26,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542575630] [2024-06-20 15:25:26,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542575630] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:25:26,494 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:25:26,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:25:26,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795681418] [2024-06-20 15:25:26,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:25:26,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:25:26,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:25:26,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:25:26,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:25:26,547 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:25:26,547 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 473 places, 515 transitions, 7063 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:26,547 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:25:26,547 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:25:26,547 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:25:29,258 INFO L124 PetriNetUnfolderBase]: 6471/10968 cut-off events. [2024-06-20 15:25:29,259 INFO L125 PetriNetUnfolderBase]: For 3134191/3134194 co-relation queries the response was YES. [2024-06-20 15:25:29,396 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91109 conditions, 10968 events. 6471/10968 cut-off events. For 3134191/3134194 co-relation queries the response was YES. Maximal size of possible extension queue 794. Compared 84340 event pairs, 2390 based on Foata normal form. 36/10996 useless extension candidates. Maximal degree in co-relation 90892. Up to 9557 conditions per place. [2024-06-20 15:25:29,425 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 363 selfloop transitions, 164 changer transitions 3/537 dead transitions. [2024-06-20 15:25:29,425 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 480 places, 537 transitions, 8213 flow [2024-06-20 15:25:29,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:25:29,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:25:29,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 186 transitions. [2024-06-20 15:25:29,426 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.58125 [2024-06-20 15:25:29,426 INFO L175 Difference]: Start difference. First operand has 473 places, 515 transitions, 7063 flow. Second operand 8 states and 186 transitions. [2024-06-20 15:25:29,426 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 480 places, 537 transitions, 8213 flow [2024-06-20 15:25:39,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 474 places, 537 transitions, 7856 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-20 15:25:39,533 INFO L231 Difference]: Finished difference. Result has 475 places, 515 transitions, 7053 flow [2024-06-20 15:25:39,533 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6706, PETRI_DIFFERENCE_MINUEND_PLACES=467, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=515, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=163, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=351, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7053, PETRI_PLACES=475, PETRI_TRANSITIONS=515} [2024-06-20 15:25:39,533 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 434 predicate places. [2024-06-20 15:25:39,533 INFO L495 AbstractCegarLoop]: Abstraction has has 475 places, 515 transitions, 7053 flow [2024-06-20 15:25:39,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:39,533 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:25:39,533 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:25:39,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177 [2024-06-20 15:25:39,534 INFO L420 AbstractCegarLoop]: === Iteration 179 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:25:39,534 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:25:39,534 INFO L85 PathProgramCache]: Analyzing trace with hash 216217776, now seen corresponding path program 25 times [2024-06-20 15:25:39,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:25:39,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467575306] [2024-06-20 15:25:39,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:25:39,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:25:39,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:25:39,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:25:39,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:25:39,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467575306] [2024-06-20 15:25:39,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467575306] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:25:39,625 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:25:39,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:25:39,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664389797] [2024-06-20 15:25:39,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:25:39,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:25:39,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:25:39,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:25:39,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:25:39,659 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:25:39,659 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 475 places, 515 transitions, 7053 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:39,659 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:25:39,659 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:25:39,660 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:25:42,520 INFO L124 PetriNetUnfolderBase]: 6402/10854 cut-off events. [2024-06-20 15:25:42,520 INFO L125 PetriNetUnfolderBase]: For 2865613/2865616 co-relation queries the response was YES. [2024-06-20 15:25:42,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86902 conditions, 10854 events. 6402/10854 cut-off events. For 2865613/2865616 co-relation queries the response was YES. Maximal size of possible extension queue 787. Compared 82962 event pairs, 1945 based on Foata normal form. 32/10875 useless extension candidates. Maximal degree in co-relation 86684. Up to 8121 conditions per place. [2024-06-20 15:25:42,686 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 340 selfloop transitions, 219 changer transitions 3/569 dead transitions. [2024-06-20 15:25:42,686 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 484 places, 569 transitions, 8617 flow [2024-06-20 15:25:42,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:25:42,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:25:42,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 261 transitions. [2024-06-20 15:25:42,687 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6525 [2024-06-20 15:25:42,687 INFO L175 Difference]: Start difference. First operand has 475 places, 515 transitions, 7053 flow. Second operand 10 states and 261 transitions. [2024-06-20 15:25:42,687 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 484 places, 569 transitions, 8617 flow [2024-06-20 15:25:51,635 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 478 places, 569 transitions, 8268 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-20 15:25:51,640 INFO L231 Difference]: Finished difference. Result has 479 places, 515 transitions, 7152 flow [2024-06-20 15:25:51,641 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6704, PETRI_DIFFERENCE_MINUEND_PLACES=469, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=515, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=219, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7152, PETRI_PLACES=479, PETRI_TRANSITIONS=515} [2024-06-20 15:25:51,641 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 438 predicate places. [2024-06-20 15:25:51,641 INFO L495 AbstractCegarLoop]: Abstraction has has 479 places, 515 transitions, 7152 flow [2024-06-20 15:25:51,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:51,641 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:25:51,641 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:25:51,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable178 [2024-06-20 15:25:51,641 INFO L420 AbstractCegarLoop]: === Iteration 180 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:25:51,641 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:25:51,641 INFO L85 PathProgramCache]: Analyzing trace with hash 216365646, now seen corresponding path program 26 times [2024-06-20 15:25:51,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:25:51,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444018697] [2024-06-20 15:25:51,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:25:51,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:25:51,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:25:51,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:25:51,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:25:51,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444018697] [2024-06-20 15:25:51,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444018697] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:25:51,727 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:25:51,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:25:51,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516163805] [2024-06-20 15:25:51,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:25:51,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:25:51,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:25:51,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:25:51,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:25:51,765 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:25:51,765 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 479 places, 515 transitions, 7152 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:51,765 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:25:51,765 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:25:51,765 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:25:54,427 INFO L124 PetriNetUnfolderBase]: 6333/10751 cut-off events. [2024-06-20 15:25:54,427 INFO L125 PetriNetUnfolderBase]: For 2631226/2631229 co-relation queries the response was YES. [2024-06-20 15:25:54,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82471 conditions, 10751 events. 6333/10751 cut-off events. For 2631226/2631229 co-relation queries the response was YES. Maximal size of possible extension queue 781. Compared 82596 event pairs, 2228 based on Foata normal form. 36/10776 useless extension candidates. Maximal degree in co-relation 82252. Up to 9272 conditions per place. [2024-06-20 15:25:54,593 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 355 selfloop transitions, 197 changer transitions 3/562 dead transitions. [2024-06-20 15:25:54,593 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 488 places, 562 transitions, 8398 flow [2024-06-20 15:25:54,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:25:54,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:25:54,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 255 transitions. [2024-06-20 15:25:54,594 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6375 [2024-06-20 15:25:54,594 INFO L175 Difference]: Start difference. First operand has 479 places, 515 transitions, 7152 flow. Second operand 10 states and 255 transitions. [2024-06-20 15:25:54,595 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 488 places, 562 transitions, 8398 flow [2024-06-20 15:26:03,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 477 places, 562 transitions, 7981 flow, removed 9 selfloop flow, removed 11 redundant places. [2024-06-20 15:26:03,351 INFO L231 Difference]: Finished difference. Result has 478 places, 514 transitions, 7132 flow [2024-06-20 15:26:03,351 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6735, PETRI_DIFFERENCE_MINUEND_PLACES=468, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=515, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=197, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=318, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7132, PETRI_PLACES=478, PETRI_TRANSITIONS=514} [2024-06-20 15:26:03,351 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 437 predicate places. [2024-06-20 15:26:03,351 INFO L495 AbstractCegarLoop]: Abstraction has has 478 places, 514 transitions, 7132 flow [2024-06-20 15:26:03,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:26:03,351 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:26:03,351 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:26:03,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable179 [2024-06-20 15:26:03,351 INFO L420 AbstractCegarLoop]: === Iteration 181 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:26:03,351 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:26:03,351 INFO L85 PathProgramCache]: Analyzing trace with hash -1303270916, now seen corresponding path program 27 times [2024-06-20 15:26:03,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:26:03,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728924869] [2024-06-20 15:26:03,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:26:03,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:26:03,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:26:03,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:26:03,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:26:03,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728924869] [2024-06-20 15:26:03,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728924869] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:26:03,447 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:26:03,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:26:03,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56286414] [2024-06-20 15:26:03,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:26:03,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:26:03,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:26:03,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:26:03,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:26:03,483 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:26:03,483 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 478 places, 514 transitions, 7132 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:26:03,483 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:26:03,483 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:26:03,484 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:26:06,070 INFO L124 PetriNetUnfolderBase]: 6254/10645 cut-off events. [2024-06-20 15:26:06,070 INFO L125 PetriNetUnfolderBase]: For 2250750/2250753 co-relation queries the response was YES. [2024-06-20 15:26:06,203 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76759 conditions, 10645 events. 6254/10645 cut-off events. For 2250750/2250753 co-relation queries the response was YES. Maximal size of possible extension queue 772. Compared 81866 event pairs, 2233 based on Foata normal form. 36/10673 useless extension candidates. Maximal degree in co-relation 76542. Up to 9219 conditions per place. [2024-06-20 15:26:06,230 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 393 selfloop transitions, 140 changer transitions 3/543 dead transitions. [2024-06-20 15:26:06,231 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 484 places, 543 transitions, 8294 flow [2024-06-20 15:26:06,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:26:06,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:26:06,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-20 15:26:06,231 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6321428571428571 [2024-06-20 15:26:06,231 INFO L175 Difference]: Start difference. First operand has 478 places, 514 transitions, 7132 flow. Second operand 7 states and 177 transitions. [2024-06-20 15:26:06,231 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 484 places, 543 transitions, 8294 flow [2024-06-20 15:26:13,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 472 places, 543 transitions, 7870 flow, removed 9 selfloop flow, removed 12 redundant places. [2024-06-20 15:26:13,690 INFO L231 Difference]: Finished difference. Result has 473 places, 513 transitions, 6985 flow [2024-06-20 15:26:13,690 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6708, PETRI_DIFFERENCE_MINUEND_PLACES=466, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=514, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=140, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=374, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6985, PETRI_PLACES=473, PETRI_TRANSITIONS=513} [2024-06-20 15:26:13,690 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 432 predicate places. [2024-06-20 15:26:13,690 INFO L495 AbstractCegarLoop]: Abstraction has has 473 places, 513 transitions, 6985 flow [2024-06-20 15:26:13,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:26:13,690 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:26:13,691 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:26:13,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180 [2024-06-20 15:26:13,691 INFO L420 AbstractCegarLoop]: === Iteration 182 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:26:13,691 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:26:13,691 INFO L85 PathProgramCache]: Analyzing trace with hash 221728026, now seen corresponding path program 28 times [2024-06-20 15:26:13,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:26:13,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967773095] [2024-06-20 15:26:13,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:26:13,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:26:13,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:26:13,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:26:13,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:26:13,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967773095] [2024-06-20 15:26:13,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967773095] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:26:13,782 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:26:13,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:26:13,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059275916] [2024-06-20 15:26:13,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:26:13,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:26:13,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:26:13,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:26:13,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:26:13,830 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:26:13,830 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 473 places, 513 transitions, 6985 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:26:13,830 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:26:13,830 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:26:13,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:26:16,328 INFO L124 PetriNetUnfolderBase]: 6175/10517 cut-off events. [2024-06-20 15:26:16,328 INFO L125 PetriNetUnfolderBase]: For 1885271/1885274 co-relation queries the response was YES. [2024-06-20 15:26:16,458 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71048 conditions, 10517 events. 6175/10517 cut-off events. For 1885271/1885274 co-relation queries the response was YES. Maximal size of possible extension queue 763. Compared 80722 event pairs, 2130 based on Foata normal form. 36/10542 useless extension candidates. Maximal degree in co-relation 70833. Up to 9070 conditions per place. [2024-06-20 15:26:16,483 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 367 selfloop transitions, 176 changer transitions 3/553 dead transitions. [2024-06-20 15:26:16,484 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 481 places, 553 transitions, 8195 flow [2024-06-20 15:26:16,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:26:16,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:26:16,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 230 transitions. [2024-06-20 15:26:16,484 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6388888888888888 [2024-06-20 15:26:16,484 INFO L175 Difference]: Start difference. First operand has 473 places, 513 transitions, 6985 flow. Second operand 9 states and 230 transitions. [2024-06-20 15:26:16,484 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 481 places, 553 transitions, 8195 flow [2024-06-20 15:26:22,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 474 places, 553 transitions, 7881 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-20 15:26:22,864 INFO L231 Difference]: Finished difference. Result has 475 places, 512 transitions, 7023 flow [2024-06-20 15:26:22,864 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6671, PETRI_DIFFERENCE_MINUEND_PLACES=466, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=513, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=176, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=337, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7023, PETRI_PLACES=475, PETRI_TRANSITIONS=512} [2024-06-20 15:26:22,864 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 434 predicate places. [2024-06-20 15:26:22,864 INFO L495 AbstractCegarLoop]: Abstraction has has 475 places, 512 transitions, 7023 flow [2024-06-20 15:26:22,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:26:22,864 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:26:22,864 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:26:22,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181 [2024-06-20 15:26:22,864 INFO L420 AbstractCegarLoop]: === Iteration 183 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:26:22,865 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:26:22,865 INFO L85 PathProgramCache]: Analyzing trace with hash -1970453038, now seen corresponding path program 29 times [2024-06-20 15:26:22,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:26:22,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408736244] [2024-06-20 15:26:22,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:26:22,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:26:22,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:26:22,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:26:22,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:26:22,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408736244] [2024-06-20 15:26:22,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408736244] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:26:22,947 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:26:22,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:26:22,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703610874] [2024-06-20 15:26:22,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:26:22,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:26:22,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:26:22,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:26:22,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:26:22,987 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:26:22,987 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 475 places, 512 transitions, 7023 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:26:22,987 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:26:22,987 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:26:22,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:26:25,408 INFO L124 PetriNetUnfolderBase]: 6093/10364 cut-off events. [2024-06-20 15:26:25,408 INFO L125 PetriNetUnfolderBase]: For 1586645/1586648 co-relation queries the response was YES. [2024-06-20 15:26:25,533 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65675 conditions, 10364 events. 6093/10364 cut-off events. For 1586645/1586648 co-relation queries the response was YES. Maximal size of possible extension queue 754. Compared 79233 event pairs, 1908 based on Foata normal form. 38/10371 useless extension candidates. Maximal degree in co-relation 65460. Up to 8549 conditions per place. [2024-06-20 15:26:25,557 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 350 selfloop transitions, 202 changer transitions 3/562 dead transitions. [2024-06-20 15:26:25,558 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 484 places, 562 transitions, 8293 flow [2024-06-20 15:26:25,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:26:25,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:26:25,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 259 transitions. [2024-06-20 15:26:25,568 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6475 [2024-06-20 15:26:25,569 INFO L175 Difference]: Start difference. First operand has 475 places, 512 transitions, 7023 flow. Second operand 10 states and 259 transitions. [2024-06-20 15:26:25,569 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 484 places, 562 transitions, 8293 flow [2024-06-20 15:26:33,036 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 473 places, 562 transitions, 7839 flow, removed 23 selfloop flow, removed 11 redundant places. [2024-06-20 15:26:33,042 INFO L231 Difference]: Finished difference. Result has 474 places, 512 transitions, 6984 flow [2024-06-20 15:26:33,042 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6569, PETRI_DIFFERENCE_MINUEND_PLACES=464, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=512, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=202, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=310, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6984, PETRI_PLACES=474, PETRI_TRANSITIONS=512} [2024-06-20 15:26:33,042 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 433 predicate places. [2024-06-20 15:26:33,042 INFO L495 AbstractCegarLoop]: Abstraction has has 474 places, 512 transitions, 6984 flow [2024-06-20 15:26:33,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:26:33,042 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:26:33,042 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:26:33,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182 [2024-06-20 15:26:33,043 INFO L420 AbstractCegarLoop]: === Iteration 184 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:26:33,043 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:26:33,043 INFO L85 PathProgramCache]: Analyzing trace with hash -2059018798, now seen corresponding path program 30 times [2024-06-20 15:26:33,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:26:33,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357588137] [2024-06-20 15:26:33,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:26:33,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:26:33,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:26:33,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:26:33,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:26:33,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357588137] [2024-06-20 15:26:33,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357588137] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:26:33,123 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:26:33,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:26:33,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296325352] [2024-06-20 15:26:33,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:26:33,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:26:33,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:26:33,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:26:33,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:26:33,162 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:26:33,162 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 474 places, 512 transitions, 6984 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:26:33,162 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:26:33,162 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:26:33,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:26:35,698 INFO L124 PetriNetUnfolderBase]: 6168/10521 cut-off events. [2024-06-20 15:26:35,698 INFO L125 PetriNetUnfolderBase]: For 1513438/1513441 co-relation queries the response was YES. [2024-06-20 15:26:35,822 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65153 conditions, 10521 events. 6168/10521 cut-off events. For 1513438/1513441 co-relation queries the response was YES. Maximal size of possible extension queue 768. Compared 80712 event pairs, 1634 based on Foata normal form. 38/10532 useless extension candidates. Maximal degree in co-relation 64939. Up to 5964 conditions per place. [2024-06-20 15:26:35,845 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 330 selfloop transitions, 221 changer transitions 7/565 dead transitions. [2024-06-20 15:26:35,845 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 482 places, 565 transitions, 8620 flow [2024-06-20 15:26:35,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:26:35,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:26:35,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 240 transitions. [2024-06-20 15:26:35,846 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-06-20 15:26:35,846 INFO L175 Difference]: Start difference. First operand has 474 places, 512 transitions, 6984 flow. Second operand 9 states and 240 transitions. [2024-06-20 15:26:35,846 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 482 places, 565 transitions, 8620 flow [2024-06-20 15:26:41,998 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 472 places, 565 transitions, 8156 flow, removed 28 selfloop flow, removed 10 redundant places. [2024-06-20 15:26:42,003 INFO L231 Difference]: Finished difference. Result has 474 places, 510 transitions, 7072 flow [2024-06-20 15:26:42,004 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6526, PETRI_DIFFERENCE_MINUEND_PLACES=464, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=512, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=220, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=291, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7072, PETRI_PLACES=474, PETRI_TRANSITIONS=510} [2024-06-20 15:26:42,004 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 433 predicate places. [2024-06-20 15:26:42,004 INFO L495 AbstractCegarLoop]: Abstraction has has 474 places, 510 transitions, 7072 flow [2024-06-20 15:26:42,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:26:42,004 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:26:42,004 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:26:42,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183 [2024-06-20 15:26:42,004 INFO L420 AbstractCegarLoop]: === Iteration 185 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:26:42,005 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:26:42,005 INFO L85 PathProgramCache]: Analyzing trace with hash 1505428732, now seen corresponding path program 5 times [2024-06-20 15:26:42,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:26:42,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451030933] [2024-06-20 15:26:42,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:26:42,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:26:42,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:26:42,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:26:42,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:26:42,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451030933] [2024-06-20 15:26:42,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451030933] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:26:42,082 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:26:42,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:26:42,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586450236] [2024-06-20 15:26:42,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:26:42,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:26:42,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:26:42,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:26:42,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:26:42,133 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:26:42,134 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 474 places, 510 transitions, 7072 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:26:42,134 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:26:42,134 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:26:42,134 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:26:44,777 INFO L124 PetriNetUnfolderBase]: 6177/10586 cut-off events. [2024-06-20 15:26:44,777 INFO L125 PetriNetUnfolderBase]: For 1363446/1363449 co-relation queries the response was YES. [2024-06-20 15:26:44,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67892 conditions, 10586 events. 6177/10586 cut-off events. For 1363446/1363449 co-relation queries the response was YES. Maximal size of possible extension queue 769. Compared 81718 event pairs, 2065 based on Foata normal form. 8/10586 useless extension candidates. Maximal degree in co-relation 67677. Up to 8060 conditions per place. [2024-06-20 15:26:44,948 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 359 selfloop transitions, 185 changer transitions 0/551 dead transitions. [2024-06-20 15:26:44,948 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 481 places, 551 transitions, 8594 flow [2024-06-20 15:26:44,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:26:44,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:26:44,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-06-20 15:26:44,949 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.63125 [2024-06-20 15:26:44,949 INFO L175 Difference]: Start difference. First operand has 474 places, 510 transitions, 7072 flow. Second operand 8 states and 202 transitions. [2024-06-20 15:26:44,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 481 places, 551 transitions, 8594 flow [2024-06-20 15:26:52,224 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 472 places, 551 transitions, 8176 flow, removed 12 selfloop flow, removed 9 redundant places. [2024-06-20 15:26:52,230 INFO L231 Difference]: Finished difference. Result has 473 places, 511 transitions, 7070 flow [2024-06-20 15:26:52,230 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6660, PETRI_DIFFERENCE_MINUEND_PLACES=465, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=510, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=184, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=326, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7070, PETRI_PLACES=473, PETRI_TRANSITIONS=511} [2024-06-20 15:26:52,230 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 432 predicate places. [2024-06-20 15:26:52,230 INFO L495 AbstractCegarLoop]: Abstraction has has 473 places, 511 transitions, 7070 flow [2024-06-20 15:26:52,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:26:52,230 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:26:52,230 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:26:52,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184 [2024-06-20 15:26:52,231 INFO L420 AbstractCegarLoop]: === Iteration 186 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:26:52,231 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:26:52,231 INFO L85 PathProgramCache]: Analyzing trace with hash -1579122594, now seen corresponding path program 6 times [2024-06-20 15:26:52,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:26:52,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103504903] [2024-06-20 15:26:52,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:26:52,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:26:52,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:26:52,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:26:52,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:26:52,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103504903] [2024-06-20 15:26:52,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103504903] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:26:52,309 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:26:52,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:26:52,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509105289] [2024-06-20 15:26:52,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:26:52,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:26:52,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:26:52,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:26:52,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:26:52,351 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:26:52,351 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 473 places, 511 transitions, 7070 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:26:52,352 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:26:52,352 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:26:52,352 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:26:54,890 INFO L124 PetriNetUnfolderBase]: 6197/10605 cut-off events. [2024-06-20 15:26:54,890 INFO L125 PetriNetUnfolderBase]: For 1345069/1345072 co-relation queries the response was YES. [2024-06-20 15:26:55,018 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67678 conditions, 10605 events. 6197/10605 cut-off events. For 1345069/1345072 co-relation queries the response was YES. Maximal size of possible extension queue 773. Compared 81755 event pairs, 2224 based on Foata normal form. 8/10605 useless extension candidates. Maximal degree in co-relation 67463. Up to 8072 conditions per place. [2024-06-20 15:26:55,043 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 357 selfloop transitions, 183 changer transitions 0/547 dead transitions. [2024-06-20 15:26:55,043 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 480 places, 547 transitions, 8564 flow [2024-06-20 15:26:55,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:26:55,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:26:55,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-20 15:26:55,043 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.615625 [2024-06-20 15:26:55,043 INFO L175 Difference]: Start difference. First operand has 473 places, 511 transitions, 7070 flow. Second operand 8 states and 197 transitions. [2024-06-20 15:26:55,043 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 480 places, 547 transitions, 8564 flow [2024-06-20 15:27:01,135 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 469 places, 547 transitions, 7550 flow, removed 41 selfloop flow, removed 11 redundant places. [2024-06-20 15:27:01,141 INFO L231 Difference]: Finished difference. Result has 470 places, 512 transitions, 6464 flow [2024-06-20 15:27:01,141 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6076, PETRI_DIFFERENCE_MINUEND_PLACES=462, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=511, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=182, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=329, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6464, PETRI_PLACES=470, PETRI_TRANSITIONS=512} [2024-06-20 15:27:01,141 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 429 predicate places. [2024-06-20 15:27:01,141 INFO L495 AbstractCegarLoop]: Abstraction has has 470 places, 512 transitions, 6464 flow [2024-06-20 15:27:01,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:01,141 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:27:01,141 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:27:01,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185 [2024-06-20 15:27:01,142 INFO L420 AbstractCegarLoop]: === Iteration 187 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:27:01,142 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:27:01,142 INFO L85 PathProgramCache]: Analyzing trace with hash -1103511846, now seen corresponding path program 7 times [2024-06-20 15:27:01,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:27:01,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295494208] [2024-06-20 15:27:01,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:27:01,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:27:01,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:27:01,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:27:01,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:27:01,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295494208] [2024-06-20 15:27:01,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295494208] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:27:01,221 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:27:01,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:27:01,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787877873] [2024-06-20 15:27:01,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:27:01,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:27:01,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:27:01,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:27:01,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:27:01,266 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:27:01,266 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 470 places, 512 transitions, 6464 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:01,266 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:27:01,266 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:27:01,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:27:03,770 INFO L124 PetriNetUnfolderBase]: 6217/10658 cut-off events. [2024-06-20 15:27:03,770 INFO L125 PetriNetUnfolderBase]: For 1356531/1356534 co-relation queries the response was YES. [2024-06-20 15:27:03,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65002 conditions, 10658 events. 6217/10658 cut-off events. For 1356531/1356534 co-relation queries the response was YES. Maximal size of possible extension queue 777. Compared 82563 event pairs, 2262 based on Foata normal form. 8/10658 useless extension candidates. Maximal degree in co-relation 64791. Up to 9287 conditions per place. [2024-06-20 15:27:03,929 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 359 selfloop transitions, 172 changer transitions 0/538 dead transitions. [2024-06-20 15:27:03,929 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 477 places, 538 transitions, 7624 flow [2024-06-20 15:27:03,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:27:03,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:27:03,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 188 transitions. [2024-06-20 15:27:03,930 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5875 [2024-06-20 15:27:03,930 INFO L175 Difference]: Start difference. First operand has 470 places, 512 transitions, 6464 flow. Second operand 8 states and 188 transitions. [2024-06-20 15:27:03,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 477 places, 538 transitions, 7624 flow [2024-06-20 15:27:11,792 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 472 places, 538 transitions, 7276 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-20 15:27:11,797 INFO L231 Difference]: Finished difference. Result has 473 places, 513 transitions, 6486 flow [2024-06-20 15:27:11,797 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6117, PETRI_DIFFERENCE_MINUEND_PLACES=465, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=512, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=171, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6486, PETRI_PLACES=473, PETRI_TRANSITIONS=513} [2024-06-20 15:27:11,798 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 432 predicate places. [2024-06-20 15:27:11,798 INFO L495 AbstractCegarLoop]: Abstraction has has 473 places, 513 transitions, 6486 flow [2024-06-20 15:27:11,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:11,798 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:27:11,798 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:27:11,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186 [2024-06-20 15:27:11,798 INFO L420 AbstractCegarLoop]: === Iteration 188 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:27:11,798 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:27:11,798 INFO L85 PathProgramCache]: Analyzing trace with hash -857522948, now seen corresponding path program 8 times [2024-06-20 15:27:11,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:27:11,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585748435] [2024-06-20 15:27:11,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:27:11,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:27:11,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:27:11,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:27:11,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:27:11,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585748435] [2024-06-20 15:27:11,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585748435] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:27:11,874 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:27:11,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:27:11,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284254646] [2024-06-20 15:27:11,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:27:11,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:27:11,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:27:11,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:27:11,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:27:11,908 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:27:11,909 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 473 places, 513 transitions, 6486 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:11,909 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:27:11,909 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:27:11,909 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:27:14,593 INFO L124 PetriNetUnfolderBase]: 6465/11082 cut-off events. [2024-06-20 15:27:14,593 INFO L125 PetriNetUnfolderBase]: For 1784620/1784623 co-relation queries the response was YES. [2024-06-20 15:27:14,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72638 conditions, 11082 events. 6465/11082 cut-off events. For 1784620/1784623 co-relation queries the response was YES. Maximal size of possible extension queue 810. Compared 85818 event pairs, 2263 based on Foata normal form. 8/11082 useless extension candidates. Maximal degree in co-relation 72426. Up to 5552 conditions per place. [2024-06-20 15:27:14,767 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 376 selfloop transitions, 176 changer transitions 0/559 dead transitions. [2024-06-20 15:27:14,767 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 480 places, 559 transitions, 8298 flow [2024-06-20 15:27:14,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:27:14,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:27:14,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 205 transitions. [2024-06-20 15:27:14,768 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.640625 [2024-06-20 15:27:14,768 INFO L175 Difference]: Start difference. First operand has 473 places, 513 transitions, 6486 flow. Second operand 8 states and 205 transitions. [2024-06-20 15:27:14,768 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 480 places, 559 transitions, 8298 flow [2024-06-20 15:27:21,597 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 474 places, 559 transitions, 7942 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-20 15:27:21,603 INFO L231 Difference]: Finished difference. Result has 475 places, 514 transitions, 6512 flow [2024-06-20 15:27:21,603 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6130, PETRI_DIFFERENCE_MINUEND_PLACES=467, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=513, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=175, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=338, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6512, PETRI_PLACES=475, PETRI_TRANSITIONS=514} [2024-06-20 15:27:21,603 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 434 predicate places. [2024-06-20 15:27:21,603 INFO L495 AbstractCegarLoop]: Abstraction has has 475 places, 514 transitions, 6512 flow [2024-06-20 15:27:21,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:21,603 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:27:21,603 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:27:21,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187 [2024-06-20 15:27:21,603 INFO L420 AbstractCegarLoop]: === Iteration 189 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:27:21,604 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:27:21,604 INFO L85 PathProgramCache]: Analyzing trace with hash -857224418, now seen corresponding path program 9 times [2024-06-20 15:27:21,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:27:21,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26719268] [2024-06-20 15:27:21,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:27:21,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:27:21,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:27:21,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:27:21,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:27:21,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26719268] [2024-06-20 15:27:21,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26719268] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:27:21,680 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:27:21,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:27:21,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711615356] [2024-06-20 15:27:21,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:27:21,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:27:21,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:27:21,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:27:21,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:27:21,724 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:27:21,724 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 475 places, 514 transitions, 6512 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:21,724 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:27:21,724 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:27:21,724 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:27:24,554 INFO L124 PetriNetUnfolderBase]: 6485/11118 cut-off events. [2024-06-20 15:27:24,554 INFO L125 PetriNetUnfolderBase]: For 1813260/1813263 co-relation queries the response was YES.