./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe036.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe036.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7724a2de Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe036.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe036.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-28 01:02:46,859 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-28 01:02:46,925 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-28 01:02:46,930 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-28 01:02:46,931 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-28 01:02:46,955 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-28 01:02:46,955 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-28 01:02:46,955 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-28 01:02:46,956 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-28 01:02:46,959 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-28 01:02:46,959 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-28 01:02:46,960 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-28 01:02:46,960 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-28 01:02:46,961 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-28 01:02:46,962 INFO L153 SettingsManager]: * Use SBE=true [2024-06-28 01:02:46,962 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-28 01:02:46,962 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-28 01:02:46,962 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-28 01:02:46,962 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-28 01:02:46,963 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-28 01:02:46,963 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-28 01:02:46,963 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-28 01:02:46,963 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-28 01:02:46,964 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-28 01:02:46,964 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-28 01:02:46,964 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-28 01:02:46,964 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-28 01:02:46,965 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-28 01:02:46,965 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-28 01:02:46,965 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-28 01:02:46,966 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-28 01:02:46,966 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-28 01:02:46,966 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-28 01:02:46,967 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-28 01:02:46,967 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-28 01:02:46,967 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-28 01:02:46,967 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-28 01:02:46,967 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-28 01:02:46,967 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-28 01:02:46,968 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-28 01:02:46,968 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-28 01:02:46,968 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-28 01:02:46,968 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-28 01:02:46,968 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-06-28 01:02:47,175 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-28 01:02:47,193 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-28 01:02:47,195 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-28 01:02:47,196 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-28 01:02:47,196 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-28 01:02:47,197 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe036.yml/witness.yml [2024-06-28 01:02:47,305 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-28 01:02:47,305 INFO L274 PluginConnector]: CDTParser initialized [2024-06-28 01:02:47,306 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe036.i [2024-06-28 01:02:48,296 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-28 01:02:48,589 INFO L384 CDTParser]: Found 1 translation units. [2024-06-28 01:02:48,589 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe036.i [2024-06-28 01:02:48,602 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c18c77296/4332059955524e38ad71052d34ab6bfe/FLAG72ccd7ab1 [2024-06-28 01:02:48,618 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c18c77296/4332059955524e38ad71052d34ab6bfe [2024-06-28 01:02:48,618 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-28 01:02:48,619 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-28 01:02:48,621 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-28 01:02:48,621 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-28 01:02:48,625 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-28 01:02:48,625 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 01:02:47" (1/2) ... [2024-06-28 01:02:48,626 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4be50dee and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 01:02:48, skipping insertion in model container [2024-06-28 01:02:48,626 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 01:02:47" (1/2) ... [2024-06-28 01:02:48,628 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@5c95d3f4 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 01:02:48, skipping insertion in model container [2024-06-28 01:02:48,628 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.06 01:02:48" (2/2) ... [2024-06-28 01:02:48,629 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4be50dee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 01:02:48, skipping insertion in model container [2024-06-28 01:02:48,629 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.06 01:02:48" (2/2) ... [2024-06-28 01:02:48,629 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-28 01:02:48,655 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-28 01:02:48,656 INFO L97 edCorrectnessWitness]: Location invariant before [L768-L768] (((((! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || ((((0 <= __unbuffered_cnt && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) && (x == 0 || x == 1)) && (y == 0 || y == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt) [2024-06-28 01:02:48,656 INFO L97 edCorrectnessWitness]: Location invariant before [L767-L767] (((((! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || ((((0 <= __unbuffered_cnt && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) && (x == 0 || x == 1)) && (y == 0 || y == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt) [2024-06-28 01:02:48,657 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-28 01:02:48,657 INFO L106 edCorrectnessWitness]: ghost_update [L765-L765] multithreaded = 1; [2024-06-28 01:02:48,690 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-28 01:02:48,831 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe036.i[941,954] [2024-06-28 01:02:48,947 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-28 01:02:48,953 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local [2024-06-28 01:02:48,982 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe036.i[941,954] Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-28 01:02:49,016 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-28 01:02:49,043 INFO L206 MainTranslator]: Completed translation [2024-06-28 01:02:49,044 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 01:02:49 WrapperNode [2024-06-28 01:02:49,044 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-28 01:02:49,045 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-28 01:02:49,045 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-28 01:02:49,045 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-28 01:02:49,050 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 01:02:49" (1/1) ... [2024-06-28 01:02:49,073 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 01:02:49" (1/1) ... [2024-06-28 01:02:49,089 INFO L138 Inliner]: procedures = 174, calls = 36, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 55 [2024-06-28 01:02:49,090 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-28 01:02:49,091 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-28 01:02:49,091 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-28 01:02:49,091 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-28 01:02:49,099 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 01:02:49" (1/1) ... [2024-06-28 01:02:49,100 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 01:02:49" (1/1) ... [2024-06-28 01:02:49,105 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 01:02:49" (1/1) ... [2024-06-28 01:02:49,124 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-28 01:02:49,125 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 01:02:49" (1/1) ... [2024-06-28 01:02:49,125 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 01:02:49" (1/1) ... [2024-06-28 01:02:49,137 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 01:02:49" (1/1) ... [2024-06-28 01:02:49,140 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 01:02:49" (1/1) ... [2024-06-28 01:02:49,144 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 01:02:49" (1/1) ... [2024-06-28 01:02:49,145 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 01:02:49" (1/1) ... [2024-06-28 01:02:49,146 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-28 01:02:49,150 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-28 01:02:49,150 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-28 01:02:49,150 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-28 01:02:49,151 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 01:02:49" (1/1) ... [2024-06-28 01:02:49,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-28 01:02:49,164 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 01:02:49,212 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-28 01:02:49,230 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-28 01:02:49,243 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-28 01:02:49,243 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-28 01:02:49,244 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-28 01:02:49,244 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-28 01:02:49,244 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-28 01:02:49,244 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-28 01:02:49,244 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-28 01:02:49,244 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-28 01:02:49,244 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-28 01:02:49,244 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-28 01:02:49,245 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-28 01:02:49,360 INFO L244 CfgBuilder]: Building ICFG [2024-06-28 01:02:49,362 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-28 01:02:49,519 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-28 01:02:49,519 INFO L293 CfgBuilder]: Performing block encoding [2024-06-28 01:02:49,566 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-28 01:02:49,567 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-28 01:02:49,567 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.06 01:02:49 BoogieIcfgContainer [2024-06-28 01:02:49,567 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-28 01:02:49,569 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-28 01:02:49,569 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-28 01:02:49,571 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-28 01:02:49,571 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 01:02:47" (1/4) ... [2024-06-28 01:02:49,572 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59f7d3ee and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 28.06 01:02:49, skipping insertion in model container [2024-06-28 01:02:49,572 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.06 01:02:48" (2/4) ... [2024-06-28 01:02:49,572 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59f7d3ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.06 01:02:49, skipping insertion in model container [2024-06-28 01:02:49,572 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 01:02:49" (3/4) ... [2024-06-28 01:02:49,572 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59f7d3ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.06 01:02:49, skipping insertion in model container [2024-06-28 01:02:49,572 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.06 01:02:49" (4/4) ... [2024-06-28 01:02:49,573 INFO L112 eAbstractionObserver]: Analyzing ICFG safe036.i [2024-06-28 01:02:49,586 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-28 01:02:49,587 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-28 01:02:49,588 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-28 01:02:49,621 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-28 01:02:49,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 42 places, 36 transitions, 80 flow [2024-06-28 01:02:49,668 INFO L124 PetriNetUnfolderBase]: 1/34 cut-off events. [2024-06-28 01:02:49,670 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-28 01:02:49,672 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41 conditions, 34 events. 1/34 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 45 event pairs, 0 based on Foata normal form. 0/30 useless extension candidates. Maximal degree in co-relation 33. Up to 2 conditions per place. [2024-06-28 01:02:49,674 INFO L82 GeneralOperation]: Start removeDead. Operand has 42 places, 36 transitions, 80 flow [2024-06-28 01:02:49,677 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 38 places, 31 transitions, 68 flow [2024-06-28 01:02:49,684 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-28 01:02:49,692 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;@2e929e21, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-28 01:02:49,692 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2024-06-28 01:02:49,695 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-28 01:02:49,695 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-28 01:02:49,695 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-28 01:02:49,695 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:02:49,696 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-28 01:02:49,696 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:02:49,700 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:02:49,700 INFO L85 PathProgramCache]: Analyzing trace with hash 182021349, now seen corresponding path program 1 times [2024-06-28 01:02:49,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:02:49,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660051487] [2024-06-28 01:02:49,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:02:49,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:02:49,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:02:50,014 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:02:50,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:02:50,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660051487] [2024-06-28 01:02:50,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660051487] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:02:50,016 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:02:50,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-28 01:02:50,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8380679] [2024-06-28 01:02:50,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:02:50,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-28 01:02:50,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:02:50,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-28 01:02:50,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-28 01:02:50,074 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 36 [2024-06-28 01:02:50,077 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 31 transitions, 68 flow. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:50,078 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:02:50,078 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 36 [2024-06-28 01:02:50,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:02:50,168 INFO L124 PetriNetUnfolderBase]: 114/275 cut-off events. [2024-06-28 01:02:50,169 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-06-28 01:02:50,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 498 conditions, 275 events. 114/275 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1316 event pairs, 45 based on Foata normal form. 1/256 useless extension candidates. Maximal degree in co-relation 487. Up to 202 conditions per place. [2024-06-28 01:02:50,173 INFO L140 encePairwiseOnDemand]: 31/36 looper letters, 21 selfloop transitions, 3 changer transitions 0/39 dead transitions. [2024-06-28 01:02:50,174 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 39 transitions, 135 flow [2024-06-28 01:02:50,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-28 01:02:50,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-28 01:02:50,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 80 transitions. [2024-06-28 01:02:50,182 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7407407407407407 [2024-06-28 01:02:50,184 INFO L175 Difference]: Start difference. First operand has 38 places, 31 transitions, 68 flow. Second operand 3 states and 80 transitions. [2024-06-28 01:02:50,184 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 39 transitions, 135 flow [2024-06-28 01:02:50,186 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 39 transitions, 132 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-06-28 01:02:50,188 INFO L231 Difference]: Finished difference. Result has 39 places, 33 transitions, 87 flow [2024-06-28 01:02:50,189 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=87, PETRI_PLACES=39, PETRI_TRANSITIONS=33} [2024-06-28 01:02:50,191 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 1 predicate places. [2024-06-28 01:02:50,191 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 33 transitions, 87 flow [2024-06-28 01:02:50,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:50,192 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:02:50,192 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:02:50,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-28 01:02:50,192 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:02:50,193 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:02:50,193 INFO L85 PathProgramCache]: Analyzing trace with hash -1170967398, now seen corresponding path program 1 times [2024-06-28 01:02:50,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:02:50,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609424592] [2024-06-28 01:02:50,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:02:50,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:02:50,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:02:50,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:02:50,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:02:50,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609424592] [2024-06-28 01:02:50,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609424592] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:02:50,284 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:02:50,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-28 01:02:50,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2217610] [2024-06-28 01:02:50,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:02:50,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-28 01:02:50,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:02:50,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-28 01:02:50,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-28 01:02:50,305 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 36 [2024-06-28 01:02:50,306 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 33 transitions, 87 flow. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:50,306 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:02:50,306 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 36 [2024-06-28 01:02:50,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:02:50,360 INFO L124 PetriNetUnfolderBase]: 142/311 cut-off events. [2024-06-28 01:02:50,361 INFO L125 PetriNetUnfolderBase]: For 50/50 co-relation queries the response was YES. [2024-06-28 01:02:50,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 657 conditions, 311 events. 142/311 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1437 event pairs, 46 based on Foata normal form. 2/310 useless extension candidates. Maximal degree in co-relation 645. Up to 235 conditions per place. [2024-06-28 01:02:50,363 INFO L140 encePairwiseOnDemand]: 30/36 looper letters, 28 selfloop transitions, 5 changer transitions 0/47 dead transitions. [2024-06-28 01:02:50,363 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 47 transitions, 187 flow [2024-06-28 01:02:50,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-28 01:02:50,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-28 01:02:50,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 103 transitions. [2024-06-28 01:02:50,365 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7152777777777778 [2024-06-28 01:02:50,365 INFO L175 Difference]: Start difference. First operand has 39 places, 33 transitions, 87 flow. Second operand 4 states and 103 transitions. [2024-06-28 01:02:50,365 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 47 transitions, 187 flow [2024-06-28 01:02:50,365 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 47 transitions, 184 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-28 01:02:50,366 INFO L231 Difference]: Finished difference. Result has 42 places, 35 transitions, 111 flow [2024-06-28 01:02:50,367 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=111, PETRI_PLACES=42, PETRI_TRANSITIONS=35} [2024-06-28 01:02:50,367 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 4 predicate places. [2024-06-28 01:02:50,367 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 35 transitions, 111 flow [2024-06-28 01:02:50,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:50,368 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:02:50,368 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:02:50,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-28 01:02:50,368 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:02:50,369 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:02:50,369 INFO L85 PathProgramCache]: Analyzing trace with hash -1293567237, now seen corresponding path program 1 times [2024-06-28 01:02:50,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:02:50,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654674046] [2024-06-28 01:02:50,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:02:50,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:02:50,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:02:50,478 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:02:50,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:02:50,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654674046] [2024-06-28 01:02:50,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654674046] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:02:50,479 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:02:50,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-28 01:02:50,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318088895] [2024-06-28 01:02:50,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:02:50,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-28 01:02:50,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:02:50,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-28 01:02:50,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-28 01:02:50,495 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 36 [2024-06-28 01:02:50,496 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 35 transitions, 111 flow. Second operand has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:50,496 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:02:50,496 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 36 [2024-06-28 01:02:50,496 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:02:50,550 INFO L124 PetriNetUnfolderBase]: 141/314 cut-off events. [2024-06-28 01:02:50,550 INFO L125 PetriNetUnfolderBase]: For 150/150 co-relation queries the response was YES. [2024-06-28 01:02:50,552 INFO L83 FinitePrefix]: Finished finitePrefix Result has 733 conditions, 314 events. 141/314 cut-off events. For 150/150 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1514 event pairs, 49 based on Foata normal form. 1/302 useless extension candidates. Maximal degree in co-relation 719. Up to 241 conditions per place. [2024-06-28 01:02:50,553 INFO L140 encePairwiseOnDemand]: 31/36 looper letters, 27 selfloop transitions, 5 changer transitions 0/46 dead transitions. [2024-06-28 01:02:50,553 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 46 transitions, 201 flow [2024-06-28 01:02:50,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-28 01:02:50,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-28 01:02:50,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 99 transitions. [2024-06-28 01:02:50,555 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6875 [2024-06-28 01:02:50,555 INFO L175 Difference]: Start difference. First operand has 42 places, 35 transitions, 111 flow. Second operand 4 states and 99 transitions. [2024-06-28 01:02:50,555 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 46 transitions, 201 flow [2024-06-28 01:02:50,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 46 transitions, 192 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-06-28 01:02:50,557 INFO L231 Difference]: Finished difference. Result has 44 places, 37 transitions, 127 flow [2024-06-28 01:02:50,558 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=127, PETRI_PLACES=44, PETRI_TRANSITIONS=37} [2024-06-28 01:02:50,558 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 6 predicate places. [2024-06-28 01:02:50,558 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 37 transitions, 127 flow [2024-06-28 01:02:50,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:50,559 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:02:50,559 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:02:50,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-28 01:02:50,559 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:02:50,560 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:02:50,562 INFO L85 PathProgramCache]: Analyzing trace with hash -296419646, now seen corresponding path program 1 times [2024-06-28 01:02:50,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:02:50,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313179719] [2024-06-28 01:02:50,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:02:50,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:02:50,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:02:50,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:02:50,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:02:50,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313179719] [2024-06-28 01:02:50,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313179719] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:02:50,732 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:02:50,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 01:02:50,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480067326] [2024-06-28 01:02:50,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:02:50,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 01:02:50,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:02:50,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 01:02:50,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-28 01:02:50,791 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 36 [2024-06-28 01:02:50,792 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 37 transitions, 127 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:50,793 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:02:50,793 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 36 [2024-06-28 01:02:50,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:02:50,890 INFO L124 PetriNetUnfolderBase]: 175/406 cut-off events. [2024-06-28 01:02:50,890 INFO L125 PetriNetUnfolderBase]: For 255/255 co-relation queries the response was YES. [2024-06-28 01:02:50,893 INFO L83 FinitePrefix]: Finished finitePrefix Result has 941 conditions, 406 events. 175/406 cut-off events. For 255/255 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1992 event pairs, 43 based on Foata normal form. 4/404 useless extension candidates. Maximal degree in co-relation 926. Up to 250 conditions per place. [2024-06-28 01:02:50,896 INFO L140 encePairwiseOnDemand]: 29/36 looper letters, 39 selfloop transitions, 8 changer transitions 0/60 dead transitions. [2024-06-28 01:02:50,896 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 60 transitions, 271 flow [2024-06-28 01:02:50,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 01:02:50,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 01:02:50,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 143 transitions. [2024-06-28 01:02:50,902 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6620370370370371 [2024-06-28 01:02:50,902 INFO L175 Difference]: Start difference. First operand has 44 places, 37 transitions, 127 flow. Second operand 6 states and 143 transitions. [2024-06-28 01:02:50,902 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 60 transitions, 271 flow [2024-06-28 01:02:50,905 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 60 transitions, 262 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-06-28 01:02:50,908 INFO L231 Difference]: Finished difference. Result has 48 places, 38 transitions, 143 flow [2024-06-28 01:02:50,908 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=143, PETRI_PLACES=48, PETRI_TRANSITIONS=38} [2024-06-28 01:02:50,909 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 10 predicate places. [2024-06-28 01:02:50,910 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 38 transitions, 143 flow [2024-06-28 01:02:50,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:50,910 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:02:50,910 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:02:50,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-28 01:02:50,911 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:02:50,911 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:02:50,911 INFO L85 PathProgramCache]: Analyzing trace with hash -1512600894, now seen corresponding path program 1 times [2024-06-28 01:02:50,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:02:50,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503200919] [2024-06-28 01:02:50,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:02:50,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:02:50,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:02:51,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:02:51,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:02:51,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503200919] [2024-06-28 01:02:51,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503200919] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:02:51,065 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:02:51,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 01:02:51,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476408996] [2024-06-28 01:02:51,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:02:51,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 01:02:51,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:02:51,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 01:02:51,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-28 01:02:51,084 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 36 [2024-06-28 01:02:51,084 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 38 transitions, 143 flow. Second operand has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:51,084 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:02:51,084 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 36 [2024-06-28 01:02:51,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:02:51,139 INFO L124 PetriNetUnfolderBase]: 182/390 cut-off events. [2024-06-28 01:02:51,139 INFO L125 PetriNetUnfolderBase]: For 390/390 co-relation queries the response was YES. [2024-06-28 01:02:51,140 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1013 conditions, 390 events. 182/390 cut-off events. For 390/390 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1940 event pairs, 35 based on Foata normal form. 1/389 useless extension candidates. Maximal degree in co-relation 996. Up to 278 conditions per place. [2024-06-28 01:02:51,142 INFO L140 encePairwiseOnDemand]: 30/36 looper letters, 37 selfloop transitions, 10 changer transitions 0/60 dead transitions. [2024-06-28 01:02:51,142 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 60 transitions, 299 flow [2024-06-28 01:02:51,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 01:02:51,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 01:02:51,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 122 transitions. [2024-06-28 01:02:51,143 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6777777777777778 [2024-06-28 01:02:51,143 INFO L175 Difference]: Start difference. First operand has 48 places, 38 transitions, 143 flow. Second operand 5 states and 122 transitions. [2024-06-28 01:02:51,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 60 transitions, 299 flow [2024-06-28 01:02:51,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 60 transitions, 283 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-28 01:02:51,145 INFO L231 Difference]: Finished difference. Result has 51 places, 44 transitions, 180 flow [2024-06-28 01:02:51,145 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=127, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=180, PETRI_PLACES=51, PETRI_TRANSITIONS=44} [2024-06-28 01:02:51,146 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 13 predicate places. [2024-06-28 01:02:51,146 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 44 transitions, 180 flow [2024-06-28 01:02:51,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:51,146 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:02:51,146 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:02:51,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-28 01:02:51,146 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:02:51,147 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:02:51,147 INFO L85 PathProgramCache]: Analyzing trace with hash -1499678544, now seen corresponding path program 2 times [2024-06-28 01:02:51,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:02:51,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62669192] [2024-06-28 01:02:51,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:02:51,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:02:51,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:02:51,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:02:51,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:02:51,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62669192] [2024-06-28 01:02:51,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62669192] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:02:51,219 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:02:51,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 01:02:51,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97392560] [2024-06-28 01:02:51,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:02:51,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 01:02:51,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:02:51,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 01:02:51,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-28 01:02:51,242 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 36 [2024-06-28 01:02:51,243 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 44 transitions, 180 flow. Second operand has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:51,243 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:02:51,243 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 36 [2024-06-28 01:02:51,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:02:51,292 INFO L124 PetriNetUnfolderBase]: 180/399 cut-off events. [2024-06-28 01:02:51,292 INFO L125 PetriNetUnfolderBase]: For 516/516 co-relation queries the response was YES. [2024-06-28 01:02:51,293 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1089 conditions, 399 events. 180/399 cut-off events. For 516/516 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1982 event pairs, 42 based on Foata normal form. 1/397 useless extension candidates. Maximal degree in co-relation 1070. Up to 276 conditions per place. [2024-06-28 01:02:51,294 INFO L140 encePairwiseOnDemand]: 30/36 looper letters, 33 selfloop transitions, 10 changer transitions 0/56 dead transitions. [2024-06-28 01:02:51,294 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 56 transitions, 292 flow [2024-06-28 01:02:51,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 01:02:51,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 01:02:51,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 118 transitions. [2024-06-28 01:02:51,295 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6555555555555556 [2024-06-28 01:02:51,295 INFO L175 Difference]: Start difference. First operand has 51 places, 44 transitions, 180 flow. Second operand 5 states and 118 transitions. [2024-06-28 01:02:51,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 56 transitions, 292 flow [2024-06-28 01:02:51,297 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 56 transitions, 288 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-06-28 01:02:51,297 INFO L231 Difference]: Finished difference. Result has 56 places, 44 transitions, 201 flow [2024-06-28 01:02:51,297 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=201, PETRI_PLACES=56, PETRI_TRANSITIONS=44} [2024-06-28 01:02:51,298 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 18 predicate places. [2024-06-28 01:02:51,298 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 44 transitions, 201 flow [2024-06-28 01:02:51,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:51,298 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:02:51,298 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:02:51,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-28 01:02:51,299 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:02:51,299 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:02:51,299 INFO L85 PathProgramCache]: Analyzing trace with hash -823354951, now seen corresponding path program 1 times [2024-06-28 01:02:51,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:02:51,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17360848] [2024-06-28 01:02:51,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:02:51,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:02:51,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:02:51,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:02:51,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:02:51,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17360848] [2024-06-28 01:02:51,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17360848] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:02:51,411 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:02:51,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 01:02:51,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086166094] [2024-06-28 01:02:51,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:02:51,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 01:02:51,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:02:51,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 01:02:51,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-28 01:02:51,435 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 36 [2024-06-28 01:02:51,435 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 44 transitions, 201 flow. Second operand has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:51,435 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:02:51,435 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 36 [2024-06-28 01:02:51,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:02:51,527 INFO L124 PetriNetUnfolderBase]: 187/403 cut-off events. [2024-06-28 01:02:51,527 INFO L125 PetriNetUnfolderBase]: For 661/661 co-relation queries the response was YES. [2024-06-28 01:02:51,528 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1160 conditions, 403 events. 187/403 cut-off events. For 661/661 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 2013 event pairs, 39 based on Foata normal form. 1/401 useless extension candidates. Maximal degree in co-relation 1138. Up to 288 conditions per place. [2024-06-28 01:02:51,529 INFO L140 encePairwiseOnDemand]: 29/36 looper letters, 45 selfloop transitions, 9 changer transitions 0/67 dead transitions. [2024-06-28 01:02:51,529 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 67 transitions, 365 flow [2024-06-28 01:02:51,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 01:02:51,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 01:02:51,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 143 transitions. [2024-06-28 01:02:51,530 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6620370370370371 [2024-06-28 01:02:51,530 INFO L175 Difference]: Start difference. First operand has 56 places, 44 transitions, 201 flow. Second operand 6 states and 143 transitions. [2024-06-28 01:02:51,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 67 transitions, 365 flow [2024-06-28 01:02:51,531 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 67 transitions, 343 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-06-28 01:02:51,532 INFO L231 Difference]: Finished difference. Result has 58 places, 46 transitions, 214 flow [2024-06-28 01:02:51,532 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=179, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=214, PETRI_PLACES=58, PETRI_TRANSITIONS=46} [2024-06-28 01:02:51,533 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 20 predicate places. [2024-06-28 01:02:51,533 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 46 transitions, 214 flow [2024-06-28 01:02:51,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:51,533 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:02:51,533 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:02:51,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-28 01:02:51,533 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:02:51,534 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:02:51,534 INFO L85 PathProgramCache]: Analyzing trace with hash -2032596261, now seen corresponding path program 2 times [2024-06-28 01:02:51,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:02:51,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283388592] [2024-06-28 01:02:51,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:02:51,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:02:51,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:02:51,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:02:51,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:02:51,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283388592] [2024-06-28 01:02:51,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283388592] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:02:51,610 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:02:51,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 01:02:51,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301820933] [2024-06-28 01:02:51,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:02:51,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 01:02:51,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:02:51,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 01:02:51,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-28 01:02:51,634 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 36 [2024-06-28 01:02:51,634 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 46 transitions, 214 flow. Second operand has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:51,634 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:02:51,634 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 36 [2024-06-28 01:02:51,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:02:51,693 INFO L124 PetriNetUnfolderBase]: 194/417 cut-off events. [2024-06-28 01:02:51,694 INFO L125 PetriNetUnfolderBase]: For 793/793 co-relation queries the response was YES. [2024-06-28 01:02:51,694 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1249 conditions, 417 events. 194/417 cut-off events. For 793/793 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 2102 event pairs, 34 based on Foata normal form. 1/416 useless extension candidates. Maximal degree in co-relation 1227. Up to 263 conditions per place. [2024-06-28 01:02:51,696 INFO L140 encePairwiseOnDemand]: 29/36 looper letters, 40 selfloop transitions, 16 changer transitions 0/69 dead transitions. [2024-06-28 01:02:51,696 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 69 transitions, 406 flow [2024-06-28 01:02:51,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 01:02:51,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 01:02:51,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 145 transitions. [2024-06-28 01:02:51,697 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6712962962962963 [2024-06-28 01:02:51,697 INFO L175 Difference]: Start difference. First operand has 58 places, 46 transitions, 214 flow. Second operand 6 states and 145 transitions. [2024-06-28 01:02:51,697 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 69 transitions, 406 flow [2024-06-28 01:02:51,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 69 transitions, 387 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-28 01:02:51,700 INFO L231 Difference]: Finished difference. Result has 60 places, 50 transitions, 260 flow [2024-06-28 01:02:51,700 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=195, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=260, PETRI_PLACES=60, PETRI_TRANSITIONS=50} [2024-06-28 01:02:51,700 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 22 predicate places. [2024-06-28 01:02:51,700 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 50 transitions, 260 flow [2024-06-28 01:02:51,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:51,701 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:02:51,701 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:02:51,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-28 01:02:51,701 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:02:51,701 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:02:51,701 INFO L85 PathProgramCache]: Analyzing trace with hash -2027947687, now seen corresponding path program 1 times [2024-06-28 01:02:51,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:02:51,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919792045] [2024-06-28 01:02:51,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:02:51,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:02:51,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:02:51,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:02:51,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:02:51,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919792045] [2024-06-28 01:02:51,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919792045] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:02:51,776 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:02:51,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 01:02:51,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375077321] [2024-06-28 01:02:51,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:02:51,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 01:02:51,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:02:51,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 01:02:51,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-28 01:02:51,797 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 36 [2024-06-28 01:02:51,797 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 50 transitions, 260 flow. Second operand has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:51,797 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:02:51,797 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 36 [2024-06-28 01:02:51,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:02:51,881 INFO L124 PetriNetUnfolderBase]: 201/439 cut-off events. [2024-06-28 01:02:51,881 INFO L125 PetriNetUnfolderBase]: For 1068/1068 co-relation queries the response was YES. [2024-06-28 01:02:51,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1364 conditions, 439 events. 201/439 cut-off events. For 1068/1068 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 2280 event pairs, 38 based on Foata normal form. 1/436 useless extension candidates. Maximal degree in co-relation 1341. Up to 283 conditions per place. [2024-06-28 01:02:51,884 INFO L140 encePairwiseOnDemand]: 29/36 looper letters, 46 selfloop transitions, 14 changer transitions 0/73 dead transitions. [2024-06-28 01:02:51,884 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 73 transitions, 454 flow [2024-06-28 01:02:51,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 01:02:51,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 01:02:51,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 145 transitions. [2024-06-28 01:02:51,888 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6712962962962963 [2024-06-28 01:02:51,888 INFO L175 Difference]: Start difference. First operand has 60 places, 50 transitions, 260 flow. Second operand 6 states and 145 transitions. [2024-06-28 01:02:51,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 73 transitions, 454 flow [2024-06-28 01:02:51,890 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 73 transitions, 436 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-28 01:02:51,891 INFO L231 Difference]: Finished difference. Result has 64 places, 54 transitions, 295 flow [2024-06-28 01:02:51,891 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=242, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=295, PETRI_PLACES=64, PETRI_TRANSITIONS=54} [2024-06-28 01:02:51,892 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 26 predicate places. [2024-06-28 01:02:51,892 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 54 transitions, 295 flow [2024-06-28 01:02:51,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:51,893 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:02:51,893 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:02:51,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-28 01:02:51,893 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:02:51,893 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:02:51,894 INFO L85 PathProgramCache]: Analyzing trace with hash 1751728155, now seen corresponding path program 3 times [2024-06-28 01:02:51,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:02:51,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738468616] [2024-06-28 01:02:51,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:02:51,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:02:51,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:02:51,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:02:51,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:02:51,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738468616] [2024-06-28 01:02:51,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738468616] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:02:51,983 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:02:51,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 01:02:51,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406214599] [2024-06-28 01:02:51,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:02:51,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 01:02:51,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:02:51,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 01:02:51,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-28 01:02:52,007 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 36 [2024-06-28 01:02:52,007 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 54 transitions, 295 flow. Second operand has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:52,008 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:02:52,008 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 36 [2024-06-28 01:02:52,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:02:52,065 INFO L124 PetriNetUnfolderBase]: 199/434 cut-off events. [2024-06-28 01:02:52,065 INFO L125 PetriNetUnfolderBase]: For 1278/1278 co-relation queries the response was YES. [2024-06-28 01:02:52,066 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1429 conditions, 434 events. 199/434 cut-off events. For 1278/1278 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 2255 event pairs, 44 based on Foata normal form. 1/429 useless extension candidates. Maximal degree in co-relation 1404. Up to 272 conditions per place. [2024-06-28 01:02:52,068 INFO L140 encePairwiseOnDemand]: 29/36 looper letters, 40 selfloop transitions, 16 changer transitions 0/69 dead transitions. [2024-06-28 01:02:52,068 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 69 transitions, 439 flow [2024-06-28 01:02:52,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 01:02:52,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 01:02:52,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 141 transitions. [2024-06-28 01:02:52,069 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6527777777777778 [2024-06-28 01:02:52,069 INFO L175 Difference]: Start difference. First operand has 64 places, 54 transitions, 295 flow. Second operand 6 states and 141 transitions. [2024-06-28 01:02:52,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 69 transitions, 439 flow [2024-06-28 01:02:52,072 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 69 transitions, 423 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-28 01:02:52,073 INFO L231 Difference]: Finished difference. Result has 68 places, 54 transitions, 316 flow [2024-06-28 01:02:52,074 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=279, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=316, PETRI_PLACES=68, PETRI_TRANSITIONS=54} [2024-06-28 01:02:52,075 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 30 predicate places. [2024-06-28 01:02:52,075 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 54 transitions, 316 flow [2024-06-28 01:02:52,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:52,076 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:02:52,076 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:02:52,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-28 01:02:52,077 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:02:52,077 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:02:52,077 INFO L85 PathProgramCache]: Analyzing trace with hash 83341657, now seen corresponding path program 2 times [2024-06-28 01:02:52,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:02:52,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015850787] [2024-06-28 01:02:52,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:02:52,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:02:52,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:02:52,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:02:52,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:02:52,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015850787] [2024-06-28 01:02:52,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015850787] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:02:52,176 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:02:52,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 01:02:52,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136828871] [2024-06-28 01:02:52,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:02:52,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 01:02:52,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:02:52,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 01:02:52,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-28 01:02:52,194 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 36 [2024-06-28 01:02:52,194 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 54 transitions, 316 flow. Second operand has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:52,194 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:02:52,194 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 36 [2024-06-28 01:02:52,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:02:52,274 INFO L124 PetriNetUnfolderBase]: 206/456 cut-off events. [2024-06-28 01:02:52,274 INFO L125 PetriNetUnfolderBase]: For 1511/1511 co-relation queries the response was YES. [2024-06-28 01:02:52,275 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1547 conditions, 456 events. 206/456 cut-off events. For 1511/1511 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 2395 event pairs, 42 based on Foata normal form. 1/452 useless extension candidates. Maximal degree in co-relation 1520. Up to 288 conditions per place. [2024-06-28 01:02:52,277 INFO L140 encePairwiseOnDemand]: 29/36 looper letters, 43 selfloop transitions, 16 changer transitions 0/72 dead transitions. [2024-06-28 01:02:52,279 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 72 transitions, 500 flow [2024-06-28 01:02:52,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 01:02:52,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 01:02:52,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 142 transitions. [2024-06-28 01:02:52,280 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6574074074074074 [2024-06-28 01:02:52,280 INFO L175 Difference]: Start difference. First operand has 68 places, 54 transitions, 316 flow. Second operand 6 states and 142 transitions. [2024-06-28 01:02:52,281 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 72 transitions, 500 flow [2024-06-28 01:02:52,283 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 72 transitions, 459 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-28 01:02:52,286 INFO L231 Difference]: Finished difference. Result has 69 places, 56 transitions, 324 flow [2024-06-28 01:02:52,287 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=275, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=324, PETRI_PLACES=69, PETRI_TRANSITIONS=56} [2024-06-28 01:02:52,287 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 31 predicate places. [2024-06-28 01:02:52,287 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 56 transitions, 324 flow [2024-06-28 01:02:52,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:52,288 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:02:52,288 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:02:52,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-28 01:02:52,288 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:02:52,289 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:02:52,289 INFO L85 PathProgramCache]: Analyzing trace with hash 83580667, now seen corresponding path program 3 times [2024-06-28 01:02:52,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:02:52,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293119731] [2024-06-28 01:02:52,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:02:52,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:02:52,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:02:52,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:02:52,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:02:52,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293119731] [2024-06-28 01:02:52,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293119731] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:02:52,409 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:02:52,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 01:02:52,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209235508] [2024-06-28 01:02:52,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:02:52,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 01:02:52,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:02:52,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 01:02:52,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-28 01:02:52,430 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 36 [2024-06-28 01:02:52,430 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 56 transitions, 324 flow. Second operand has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:52,430 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:02:52,430 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 36 [2024-06-28 01:02:52,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:02:52,516 INFO L124 PetriNetUnfolderBase]: 204/458 cut-off events. [2024-06-28 01:02:52,516 INFO L125 PetriNetUnfolderBase]: For 1522/1522 co-relation queries the response was YES. [2024-06-28 01:02:52,517 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1541 conditions, 458 events. 204/458 cut-off events. For 1522/1522 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2413 event pairs, 73 based on Foata normal form. 1/454 useless extension candidates. Maximal degree in co-relation 1513. Up to 327 conditions per place. [2024-06-28 01:02:52,518 INFO L140 encePairwiseOnDemand]: 29/36 looper letters, 49 selfloop transitions, 9 changer transitions 0/71 dead transitions. [2024-06-28 01:02:52,518 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 71 transitions, 472 flow [2024-06-28 01:02:52,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 01:02:52,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 01:02:52,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 137 transitions. [2024-06-28 01:02:52,519 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6342592592592593 [2024-06-28 01:02:52,519 INFO L175 Difference]: Start difference. First operand has 69 places, 56 transitions, 324 flow. Second operand 6 states and 137 transitions. [2024-06-28 01:02:52,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 71 transitions, 472 flow [2024-06-28 01:02:52,522 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 71 transitions, 433 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-28 01:02:52,523 INFO L231 Difference]: Finished difference. Result has 71 places, 56 transitions, 308 flow [2024-06-28 01:02:52,523 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=285, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=308, PETRI_PLACES=71, PETRI_TRANSITIONS=56} [2024-06-28 01:02:52,524 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 33 predicate places. [2024-06-28 01:02:52,524 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 56 transitions, 308 flow [2024-06-28 01:02:52,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:52,524 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:02:52,524 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:02:52,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-28 01:02:52,524 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:02:52,525 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:02:52,525 INFO L85 PathProgramCache]: Analyzing trace with hash 91923449, now seen corresponding path program 1 times [2024-06-28 01:02:52,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:02:52,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574037520] [2024-06-28 01:02:52,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:02:52,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:02:52,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:02:52,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:02:52,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:02:52,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574037520] [2024-06-28 01:02:52,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574037520] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:02:52,601 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:02:52,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 01:02:52,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113038306] [2024-06-28 01:02:52,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:02:52,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 01:02:52,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:02:52,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 01:02:52,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-28 01:02:52,620 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 36 [2024-06-28 01:02:52,620 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 56 transitions, 308 flow. Second operand has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:52,620 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:02:52,620 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 36 [2024-06-28 01:02:52,621 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:02:52,688 INFO L124 PetriNetUnfolderBase]: 201/433 cut-off events. [2024-06-28 01:02:52,688 INFO L125 PetriNetUnfolderBase]: For 1530/1530 co-relation queries the response was YES. [2024-06-28 01:02:52,689 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1464 conditions, 433 events. 201/433 cut-off events. For 1530/1530 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 2210 event pairs, 29 based on Foata normal form. 2/434 useless extension candidates. Maximal degree in co-relation 1435. Up to 315 conditions per place. [2024-06-28 01:02:52,691 INFO L140 encePairwiseOnDemand]: 30/36 looper letters, 51 selfloop transitions, 8 changer transitions 0/72 dead transitions. [2024-06-28 01:02:52,691 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 72 transitions, 460 flow [2024-06-28 01:02:52,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 01:02:52,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 01:02:52,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 136 transitions. [2024-06-28 01:02:52,692 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6296296296296297 [2024-06-28 01:02:52,692 INFO L175 Difference]: Start difference. First operand has 71 places, 56 transitions, 308 flow. Second operand 6 states and 136 transitions. [2024-06-28 01:02:52,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 72 transitions, 460 flow [2024-06-28 01:02:52,695 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 72 transitions, 423 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-28 01:02:52,696 INFO L231 Difference]: Finished difference. Result has 70 places, 56 transitions, 291 flow [2024-06-28 01:02:52,696 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=271, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=291, PETRI_PLACES=70, PETRI_TRANSITIONS=56} [2024-06-28 01:02:52,696 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 32 predicate places. [2024-06-28 01:02:52,696 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 56 transitions, 291 flow [2024-06-28 01:02:52,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:52,697 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:02:52,697 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:02:52,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-28 01:02:52,697 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:02:52,697 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:02:52,697 INFO L85 PathProgramCache]: Analyzing trace with hash 295992665, now seen corresponding path program 1 times [2024-06-28 01:02:52,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:02:52,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155548956] [2024-06-28 01:02:52,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:02:52,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:02:52,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:02:52,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:02:52,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:02:52,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155548956] [2024-06-28 01:02:52,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155548956] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:02:52,764 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:02:52,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 01:02:52,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330409706] [2024-06-28 01:02:52,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:02:52,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-28 01:02:52,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:02:52,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-28 01:02:52,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-28 01:02:52,774 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 36 [2024-06-28 01:02:52,774 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 56 transitions, 291 flow. Second operand has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:52,774 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:02:52,774 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 36 [2024-06-28 01:02:52,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:02:52,814 INFO L124 PetriNetUnfolderBase]: 106/304 cut-off events. [2024-06-28 01:02:52,815 INFO L125 PetriNetUnfolderBase]: For 712/713 co-relation queries the response was YES. [2024-06-28 01:02:52,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 839 conditions, 304 events. 106/304 cut-off events. For 712/713 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1479 event pairs, 9 based on Foata normal form. 16/291 useless extension candidates. Maximal degree in co-relation 811. Up to 103 conditions per place. [2024-06-28 01:02:52,823 INFO L140 encePairwiseOnDemand]: 31/36 looper letters, 20 selfloop transitions, 12 changer transitions 0/67 dead transitions. [2024-06-28 01:02:52,824 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 67 transitions, 399 flow [2024-06-28 01:02:52,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-28 01:02:52,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-28 01:02:52,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 110 transitions. [2024-06-28 01:02:52,825 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7638888888888888 [2024-06-28 01:02:52,825 INFO L175 Difference]: Start difference. First operand has 70 places, 56 transitions, 291 flow. Second operand 4 states and 110 transitions. [2024-06-28 01:02:52,825 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 67 transitions, 399 flow [2024-06-28 01:02:52,827 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 67 transitions, 381 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-28 01:02:52,828 INFO L231 Difference]: Finished difference. Result has 71 places, 59 transitions, 345 flow [2024-06-28 01:02:52,828 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=273, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=345, PETRI_PLACES=71, PETRI_TRANSITIONS=59} [2024-06-28 01:02:52,829 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 33 predicate places. [2024-06-28 01:02:52,829 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 59 transitions, 345 flow [2024-06-28 01:02:52,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:52,829 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:02:52,829 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:02:52,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-28 01:02:52,829 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:02:52,830 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:02:52,830 INFO L85 PathProgramCache]: Analyzing trace with hash -1277360384, now seen corresponding path program 1 times [2024-06-28 01:02:52,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:02:52,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752496403] [2024-06-28 01:02:52,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:02:52,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:02:52,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:02:52,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:02:52,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:02:52,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752496403] [2024-06-28 01:02:52,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752496403] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:02:52,922 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:02:52,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 01:02:52,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312290487] [2024-06-28 01:02:52,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:02:52,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 01:02:52,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:02:52,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 01:02:52,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-28 01:02:52,949 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 36 [2024-06-28 01:02:52,949 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 59 transitions, 345 flow. Second operand has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:52,950 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:02:52,950 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 36 [2024-06-28 01:02:52,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:02:53,037 INFO L124 PetriNetUnfolderBase]: 172/401 cut-off events. [2024-06-28 01:02:53,037 INFO L125 PetriNetUnfolderBase]: For 1867/1867 co-relation queries the response was YES. [2024-06-28 01:02:53,038 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1425 conditions, 401 events. 172/401 cut-off events. For 1867/1867 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 2000 event pairs, 59 based on Foata normal form. 2/380 useless extension candidates. Maximal degree in co-relation 1395. Up to 279 conditions per place. [2024-06-28 01:02:53,040 INFO L140 encePairwiseOnDemand]: 29/36 looper letters, 53 selfloop transitions, 10 changer transitions 0/77 dead transitions. [2024-06-28 01:02:53,040 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 77 transitions, 523 flow [2024-06-28 01:02:53,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 01:02:53,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 01:02:53,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 156 transitions. [2024-06-28 01:02:53,041 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-06-28 01:02:53,041 INFO L175 Difference]: Start difference. First operand has 71 places, 59 transitions, 345 flow. Second operand 7 states and 156 transitions. [2024-06-28 01:02:53,041 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 77 transitions, 523 flow [2024-06-28 01:02:53,045 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 77 transitions, 521 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-28 01:02:53,045 INFO L231 Difference]: Finished difference. Result has 77 places, 60 transitions, 377 flow [2024-06-28 01:02:53,046 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=343, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=377, PETRI_PLACES=77, PETRI_TRANSITIONS=60} [2024-06-28 01:02:53,046 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 39 predicate places. [2024-06-28 01:02:53,046 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 60 transitions, 377 flow [2024-06-28 01:02:53,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:53,046 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:02:53,047 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:02:53,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-28 01:02:53,047 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:02:53,047 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:02:53,047 INFO L85 PathProgramCache]: Analyzing trace with hash -1660179778, now seen corresponding path program 2 times [2024-06-28 01:02:53,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:02:53,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773325924] [2024-06-28 01:02:53,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:02:53,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:02:53,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:02:53,138 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:02:53,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:02:53,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773325924] [2024-06-28 01:02:53,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773325924] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:02:53,139 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:02:53,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 01:02:53,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174545058] [2024-06-28 01:02:53,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:02:53,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 01:02:53,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:02:53,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 01:02:53,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-28 01:02:53,168 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 36 [2024-06-28 01:02:53,169 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 60 transitions, 377 flow. Second operand has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:53,169 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:02:53,169 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 36 [2024-06-28 01:02:53,169 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:02:53,262 INFO L124 PetriNetUnfolderBase]: 183/427 cut-off events. [2024-06-28 01:02:53,262 INFO L125 PetriNetUnfolderBase]: For 2273/2273 co-relation queries the response was YES. [2024-06-28 01:02:53,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1586 conditions, 427 events. 183/427 cut-off events. For 2273/2273 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 2188 event pairs, 20 based on Foata normal form. 2/406 useless extension candidates. Maximal degree in co-relation 1554. Up to 253 conditions per place. [2024-06-28 01:02:53,265 INFO L140 encePairwiseOnDemand]: 29/36 looper letters, 56 selfloop transitions, 12 changer transitions 0/82 dead transitions. [2024-06-28 01:02:53,265 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 82 transitions, 579 flow [2024-06-28 01:02:53,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 01:02:53,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 01:02:53,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 177 transitions. [2024-06-28 01:02:53,266 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6145833333333334 [2024-06-28 01:02:53,266 INFO L175 Difference]: Start difference. First operand has 77 places, 60 transitions, 377 flow. Second operand 8 states and 177 transitions. [2024-06-28 01:02:53,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 82 transitions, 579 flow [2024-06-28 01:02:53,270 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 82 transitions, 555 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-28 01:02:53,271 INFO L231 Difference]: Finished difference. Result has 80 places, 61 transitions, 393 flow [2024-06-28 01:02:53,271 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=353, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=393, PETRI_PLACES=80, PETRI_TRANSITIONS=61} [2024-06-28 01:02:53,271 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 42 predicate places. [2024-06-28 01:02:53,272 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 61 transitions, 393 flow [2024-06-28 01:02:53,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:53,272 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:02:53,272 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:02:53,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-28 01:02:53,272 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:02:53,273 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:02:53,273 INFO L85 PathProgramCache]: Analyzing trace with hash -291939360, now seen corresponding path program 1 times [2024-06-28 01:02:53,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:02:53,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188825394] [2024-06-28 01:02:53,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:02:53,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:02:53,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:02:53,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:02:53,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:02:53,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188825394] [2024-06-28 01:02:53,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188825394] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:02:53,362 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:02:53,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 01:02:53,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003256293] [2024-06-28 01:02:53,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:02:53,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 01:02:53,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:02:53,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 01:02:53,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 01:02:53,406 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 36 [2024-06-28 01:02:53,406 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 61 transitions, 393 flow. Second operand has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:53,406 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:02:53,406 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 36 [2024-06-28 01:02:53,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:02:53,479 INFO L124 PetriNetUnfolderBase]: 188/436 cut-off events. [2024-06-28 01:02:53,479 INFO L125 PetriNetUnfolderBase]: For 2496/2496 co-relation queries the response was YES. [2024-06-28 01:02:53,480 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1658 conditions, 436 events. 188/436 cut-off events. For 2496/2496 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 2194 event pairs, 58 based on Foata normal form. 1/410 useless extension candidates. Maximal degree in co-relation 1625. Up to 318 conditions per place. [2024-06-28 01:02:53,482 INFO L140 encePairwiseOnDemand]: 28/36 looper letters, 52 selfloop transitions, 11 changer transitions 0/77 dead transitions. [2024-06-28 01:02:53,482 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 77 transitions, 575 flow [2024-06-28 01:02:53,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 01:02:53,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 01:02:53,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 154 transitions. [2024-06-28 01:02:53,483 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6111111111111112 [2024-06-28 01:02:53,483 INFO L175 Difference]: Start difference. First operand has 80 places, 61 transitions, 393 flow. Second operand 7 states and 154 transitions. [2024-06-28 01:02:53,483 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 77 transitions, 575 flow [2024-06-28 01:02:53,487 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 77 transitions, 545 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-28 01:02:53,488 INFO L231 Difference]: Finished difference. Result has 81 places, 63 transitions, 416 flow [2024-06-28 01:02:53,488 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=363, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=416, PETRI_PLACES=81, PETRI_TRANSITIONS=63} [2024-06-28 01:02:53,489 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 43 predicate places. [2024-06-28 01:02:53,489 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 63 transitions, 416 flow [2024-06-28 01:02:53,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:53,489 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:02:53,489 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:02:53,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-28 01:02:53,489 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:02:53,490 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:02:53,490 INFO L85 PathProgramCache]: Analyzing trace with hash 885146106, now seen corresponding path program 3 times [2024-06-28 01:02:53,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:02:53,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440269001] [2024-06-28 01:02:53,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:02:53,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:02:53,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:02:53,573 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:02:53,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:02:53,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440269001] [2024-06-28 01:02:53,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440269001] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:02:53,574 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:02:53,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 01:02:53,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954185794] [2024-06-28 01:02:53,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:02:53,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 01:02:53,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:02:53,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 01:02:53,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-28 01:02:53,613 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 36 [2024-06-28 01:02:53,613 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 63 transitions, 416 flow. Second operand has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:53,613 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:02:53,613 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 36 [2024-06-28 01:02:53,614 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:02:53,686 INFO L124 PetriNetUnfolderBase]: 199/463 cut-off events. [2024-06-28 01:02:53,686 INFO L125 PetriNetUnfolderBase]: For 2902/2902 co-relation queries the response was YES. [2024-06-28 01:02:53,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1736 conditions, 463 events. 199/463 cut-off events. For 2902/2902 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 2393 event pairs, 61 based on Foata normal form. 2/435 useless extension candidates. Maximal degree in co-relation 1702. Up to 313 conditions per place. [2024-06-28 01:02:53,689 INFO L140 encePairwiseOnDemand]: 29/36 looper letters, 47 selfloop transitions, 17 changer transitions 0/78 dead transitions. [2024-06-28 01:02:53,689 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 78 transitions, 592 flow [2024-06-28 01:02:53,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 01:02:53,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 01:02:53,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 157 transitions. [2024-06-28 01:02:53,690 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.623015873015873 [2024-06-28 01:02:53,690 INFO L175 Difference]: Start difference. First operand has 81 places, 63 transitions, 416 flow. Second operand 7 states and 157 transitions. [2024-06-28 01:02:53,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 78 transitions, 592 flow [2024-06-28 01:02:53,694 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 78 transitions, 563 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-28 01:02:53,695 INFO L231 Difference]: Finished difference. Result has 83 places, 64 transitions, 439 flow [2024-06-28 01:02:53,696 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=387, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=439, PETRI_PLACES=83, PETRI_TRANSITIONS=64} [2024-06-28 01:02:53,696 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 45 predicate places. [2024-06-28 01:02:53,696 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 64 transitions, 439 flow [2024-06-28 01:02:53,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:53,696 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:02:53,696 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:02:53,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-28 01:02:53,697 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:02:53,697 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:02:53,697 INFO L85 PathProgramCache]: Analyzing trace with hash -176648190, now seen corresponding path program 2 times [2024-06-28 01:02:53,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:02:53,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856205569] [2024-06-28 01:02:53,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:02:53,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:02:53,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:02:53,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:02:53,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:02:53,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856205569] [2024-06-28 01:02:53,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856205569] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:02:53,770 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:02:53,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 01:02:53,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279724264] [2024-06-28 01:02:53,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:02:53,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 01:02:53,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:02:53,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 01:02:53,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-28 01:02:53,795 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 36 [2024-06-28 01:02:53,796 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 64 transitions, 439 flow. Second operand has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:53,796 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:02:53,796 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 36 [2024-06-28 01:02:53,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:02:53,867 INFO L124 PetriNetUnfolderBase]: 211/485 cut-off events. [2024-06-28 01:02:53,867 INFO L125 PetriNetUnfolderBase]: For 3452/3454 co-relation queries the response was YES. [2024-06-28 01:02:53,869 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1910 conditions, 485 events. 211/485 cut-off events. For 3452/3454 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 2539 event pairs, 62 based on Foata normal form. 3/455 useless extension candidates. Maximal degree in co-relation 1875. Up to 314 conditions per place. [2024-06-28 01:02:53,870 INFO L140 encePairwiseOnDemand]: 28/36 looper letters, 42 selfloop transitions, 25 changer transitions 0/81 dead transitions. [2024-06-28 01:02:53,870 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 81 transitions, 723 flow [2024-06-28 01:02:53,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 01:02:53,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 01:02:53,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 161 transitions. [2024-06-28 01:02:53,872 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6388888888888888 [2024-06-28 01:02:53,872 INFO L175 Difference]: Start difference. First operand has 83 places, 64 transitions, 439 flow. Second operand 7 states and 161 transitions. [2024-06-28 01:02:53,872 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 81 transitions, 723 flow [2024-06-28 01:02:53,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 81 transitions, 681 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-28 01:02:53,879 INFO L231 Difference]: Finished difference. Result has 85 places, 68 transitions, 504 flow [2024-06-28 01:02:53,879 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=397, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=504, PETRI_PLACES=85, PETRI_TRANSITIONS=68} [2024-06-28 01:02:53,879 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 47 predicate places. [2024-06-28 01:02:53,880 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 68 transitions, 504 flow [2024-06-28 01:02:53,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:53,880 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:02:53,880 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:02:53,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-28 01:02:53,880 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:02:53,881 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:02:53,881 INFO L85 PathProgramCache]: Analyzing trace with hash -4342816, now seen corresponding path program 3 times [2024-06-28 01:02:53,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:02:53,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249429751] [2024-06-28 01:02:53,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:02:53,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:02:53,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:02:53,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:02:53,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:02:53,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249429751] [2024-06-28 01:02:53,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249429751] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:02:53,953 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:02:53,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 01:02:53,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192507377] [2024-06-28 01:02:53,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:02:53,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 01:02:53,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:02:53,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 01:02:53,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-28 01:02:53,978 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 36 [2024-06-28 01:02:53,978 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 68 transitions, 504 flow. Second operand has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:53,978 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:02:53,979 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 36 [2024-06-28 01:02:53,979 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:02:54,046 INFO L124 PetriNetUnfolderBase]: 209/482 cut-off events. [2024-06-28 01:02:54,046 INFO L125 PetriNetUnfolderBase]: For 3515/3517 co-relation queries the response was YES. [2024-06-28 01:02:54,047 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1871 conditions, 482 events. 209/482 cut-off events. For 3515/3517 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 2524 event pairs, 62 based on Foata normal form. 3/452 useless extension candidates. Maximal degree in co-relation 1835. Up to 312 conditions per place. [2024-06-28 01:02:54,049 INFO L140 encePairwiseOnDemand]: 28/36 looper letters, 40 selfloop transitions, 26 changer transitions 0/80 dead transitions. [2024-06-28 01:02:54,049 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 80 transitions, 700 flow [2024-06-28 01:02:54,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 01:02:54,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 01:02:54,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 159 transitions. [2024-06-28 01:02:54,050 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6309523809523809 [2024-06-28 01:02:54,050 INFO L175 Difference]: Start difference. First operand has 85 places, 68 transitions, 504 flow. Second operand 7 states and 159 transitions. [2024-06-28 01:02:54,050 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 80 transitions, 700 flow [2024-06-28 01:02:54,060 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 80 transitions, 627 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-28 01:02:54,061 INFO L231 Difference]: Finished difference. Result has 88 places, 68 transitions, 488 flow [2024-06-28 01:02:54,062 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=431, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=488, PETRI_PLACES=88, PETRI_TRANSITIONS=68} [2024-06-28 01:02:54,062 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 50 predicate places. [2024-06-28 01:02:54,062 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 68 transitions, 488 flow [2024-06-28 01:02:54,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:54,062 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:02:54,062 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:02:54,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-28 01:02:54,063 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:02:54,063 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:02:54,063 INFO L85 PathProgramCache]: Analyzing trace with hash 1057465368, now seen corresponding path program 1 times [2024-06-28 01:02:54,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:02:54,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399419461] [2024-06-28 01:02:54,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:02:54,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:02:54,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:02:54,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:02:54,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:02:54,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399419461] [2024-06-28 01:02:54,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399419461] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:02:54,147 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:02:54,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 01:02:54,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511449837] [2024-06-28 01:02:54,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:02:54,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 01:02:54,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:02:54,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 01:02:54,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-28 01:02:54,173 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 36 [2024-06-28 01:02:54,174 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 68 transitions, 488 flow. Second operand has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:54,174 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:02:54,174 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 36 [2024-06-28 01:02:54,174 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:02:54,260 INFO L124 PetriNetUnfolderBase]: 220/508 cut-off events. [2024-06-28 01:02:54,261 INFO L125 PetriNetUnfolderBase]: For 3774/3776 co-relation queries the response was YES. [2024-06-28 01:02:54,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1940 conditions, 508 events. 220/508 cut-off events. For 3774/3776 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 2718 event pairs, 64 based on Foata normal form. 4/477 useless extension candidates. Maximal degree in co-relation 1904. Up to 354 conditions per place. [2024-06-28 01:02:54,263 INFO L140 encePairwiseOnDemand]: 29/36 looper letters, 52 selfloop transitions, 17 changer transitions 0/83 dead transitions. [2024-06-28 01:02:54,264 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 83 transitions, 668 flow [2024-06-28 01:02:54,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 01:02:54,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 01:02:54,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 157 transitions. [2024-06-28 01:02:54,265 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.623015873015873 [2024-06-28 01:02:54,265 INFO L175 Difference]: Start difference. First operand has 88 places, 68 transitions, 488 flow. Second operand 7 states and 157 transitions. [2024-06-28 01:02:54,265 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 83 transitions, 668 flow [2024-06-28 01:02:54,271 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 83 transitions, 611 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-28 01:02:54,272 INFO L231 Difference]: Finished difference. Result has 89 places, 69 transitions, 477 flow [2024-06-28 01:02:54,272 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=431, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=477, PETRI_PLACES=89, PETRI_TRANSITIONS=69} [2024-06-28 01:02:54,272 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 51 predicate places. [2024-06-28 01:02:54,272 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 69 transitions, 477 flow [2024-06-28 01:02:54,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:54,273 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:02:54,273 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:02:54,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-28 01:02:54,273 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:02:54,273 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:02:54,273 INFO L85 PathProgramCache]: Analyzing trace with hash -1571365120, now seen corresponding path program 4 times [2024-06-28 01:02:54,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:02:54,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871833547] [2024-06-28 01:02:54,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:02:54,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:02:54,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:02:54,368 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:02:54,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:02:54,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871833547] [2024-06-28 01:02:54,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871833547] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:02:54,369 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:02:54,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 01:02:54,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361695079] [2024-06-28 01:02:54,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:02:54,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 01:02:54,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:02:54,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 01:02:54,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-28 01:02:54,393 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 36 [2024-06-28 01:02:54,394 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 69 transitions, 477 flow. Second operand has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:54,394 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:02:54,394 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 36 [2024-06-28 01:02:54,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:02:54,469 INFO L124 PetriNetUnfolderBase]: 217/499 cut-off events. [2024-06-28 01:02:54,469 INFO L125 PetriNetUnfolderBase]: For 3589/3591 co-relation queries the response was YES. [2024-06-28 01:02:54,470 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1881 conditions, 499 events. 217/499 cut-off events. For 3589/3591 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2662 event pairs, 69 based on Foata normal form. 4/466 useless extension candidates. Maximal degree in co-relation 1844. Up to 343 conditions per place. [2024-06-28 01:02:54,472 INFO L140 encePairwiseOnDemand]: 29/36 looper letters, 49 selfloop transitions, 17 changer transitions 0/80 dead transitions. [2024-06-28 01:02:54,472 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 80 transitions, 637 flow [2024-06-28 01:02:54,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 01:02:54,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 01:02:54,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 154 transitions. [2024-06-28 01:02:54,473 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6111111111111112 [2024-06-28 01:02:54,473 INFO L175 Difference]: Start difference. First operand has 89 places, 69 transitions, 477 flow. Second operand 7 states and 154 transitions. [2024-06-28 01:02:54,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 80 transitions, 637 flow [2024-06-28 01:02:54,480 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 80 transitions, 601 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-28 01:02:54,481 INFO L231 Difference]: Finished difference. Result has 91 places, 69 transitions, 479 flow [2024-06-28 01:02:54,481 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=441, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=479, PETRI_PLACES=91, PETRI_TRANSITIONS=69} [2024-06-28 01:02:54,481 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 53 predicate places. [2024-06-28 01:02:54,481 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 69 transitions, 479 flow [2024-06-28 01:02:54,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:54,482 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:02:54,482 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:02:54,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-28 01:02:54,482 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:02:54,482 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:02:54,482 INFO L85 PathProgramCache]: Analyzing trace with hash 2143533530, now seen corresponding path program 4 times [2024-06-28 01:02:54,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:02:54,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370507130] [2024-06-28 01:02:54,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:02:54,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:02:54,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:02:54,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:02:54,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:02:54,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370507130] [2024-06-28 01:02:54,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370507130] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:02:54,551 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:02:54,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 01:02:54,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626998903] [2024-06-28 01:02:54,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:02:54,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 01:02:54,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:02:54,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 01:02:54,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-28 01:02:54,575 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 36 [2024-06-28 01:02:54,575 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 69 transitions, 479 flow. Second operand has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:54,575 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:02:54,575 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 36 [2024-06-28 01:02:54,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:02:54,638 INFO L124 PetriNetUnfolderBase]: 229/520 cut-off events. [2024-06-28 01:02:54,638 INFO L125 PetriNetUnfolderBase]: For 4065/4067 co-relation queries the response was YES. [2024-06-28 01:02:54,639 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2019 conditions, 520 events. 229/520 cut-off events. For 4065/4067 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 2792 event pairs, 69 based on Foata normal form. 3/482 useless extension candidates. Maximal degree in co-relation 1981. Up to 342 conditions per place. [2024-06-28 01:02:54,641 INFO L140 encePairwiseOnDemand]: 28/36 looper letters, 40 selfloop transitions, 29 changer transitions 0/83 dead transitions. [2024-06-28 01:02:54,641 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 83 transitions, 775 flow [2024-06-28 01:02:54,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 01:02:54,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 01:02:54,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 158 transitions. [2024-06-28 01:02:54,642 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.626984126984127 [2024-06-28 01:02:54,643 INFO L175 Difference]: Start difference. First operand has 91 places, 69 transitions, 479 flow. Second operand 7 states and 158 transitions. [2024-06-28 01:02:54,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 83 transitions, 775 flow [2024-06-28 01:02:54,650 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 83 transitions, 731 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-28 01:02:54,651 INFO L231 Difference]: Finished difference. Result has 93 places, 73 transitions, 550 flow [2024-06-28 01:02:54,651 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=435, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=550, PETRI_PLACES=93, PETRI_TRANSITIONS=73} [2024-06-28 01:02:54,652 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 55 predicate places. [2024-06-28 01:02:54,652 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 73 transitions, 550 flow [2024-06-28 01:02:54,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:54,652 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:02:54,652 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:02:54,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-28 01:02:54,653 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:02:54,653 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:02:54,653 INFO L85 PathProgramCache]: Analyzing trace with hash -1519681224, now seen corresponding path program 5 times [2024-06-28 01:02:54,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:02:54,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76344256] [2024-06-28 01:02:54,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:02:54,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:02:54,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:02:54,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:02:54,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:02:54,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76344256] [2024-06-28 01:02:54,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76344256] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:02:54,720 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:02:54,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 01:02:54,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925638497] [2024-06-28 01:02:54,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:02:54,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 01:02:54,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:02:54,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 01:02:54,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-28 01:02:54,741 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 36 [2024-06-28 01:02:54,742 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 73 transitions, 550 flow. Second operand has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:54,742 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:02:54,742 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 36 [2024-06-28 01:02:54,742 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:02:54,812 INFO L124 PetriNetUnfolderBase]: 227/517 cut-off events. [2024-06-28 01:02:54,813 INFO L125 PetriNetUnfolderBase]: For 4003/4005 co-relation queries the response was YES. [2024-06-28 01:02:54,814 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1976 conditions, 517 events. 227/517 cut-off events. For 4003/4005 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2765 event pairs, 69 based on Foata normal form. 3/479 useless extension candidates. Maximal degree in co-relation 1937. Up to 340 conditions per place. [2024-06-28 01:02:54,816 INFO L140 encePairwiseOnDemand]: 28/36 looper letters, 38 selfloop transitions, 30 changer transitions 0/82 dead transitions. [2024-06-28 01:02:54,828 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 82 transitions, 750 flow [2024-06-28 01:02:54,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 01:02:54,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 01:02:54,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 156 transitions. [2024-06-28 01:02:54,829 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-06-28 01:02:54,829 INFO L175 Difference]: Start difference. First operand has 93 places, 73 transitions, 550 flow. Second operand 7 states and 156 transitions. [2024-06-28 01:02:54,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 82 transitions, 750 flow [2024-06-28 01:02:54,839 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 82 transitions, 657 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-28 01:02:54,840 INFO L231 Difference]: Finished difference. Result has 95 places, 73 transitions, 522 flow [2024-06-28 01:02:54,840 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=457, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=522, PETRI_PLACES=95, PETRI_TRANSITIONS=73} [2024-06-28 01:02:54,840 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 57 predicate places. [2024-06-28 01:02:54,840 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 73 transitions, 522 flow [2024-06-28 01:02:54,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:54,841 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:02:54,841 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:02:54,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-28 01:02:54,841 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:02:54,841 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:02:54,842 INFO L85 PathProgramCache]: Analyzing trace with hash -453795204, now seen corresponding path program 6 times [2024-06-28 01:02:54,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:02:54,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663979798] [2024-06-28 01:02:54,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:02:54,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:02:54,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:02:54,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:02:54,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:02:54,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663979798] [2024-06-28 01:02:54,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663979798] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:02:54,925 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:02:54,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 01:02:54,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331580117] [2024-06-28 01:02:54,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:02:54,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 01:02:54,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:02:54,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 01:02:54,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 01:02:54,947 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 36 [2024-06-28 01:02:54,947 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 73 transitions, 522 flow. Second operand has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:54,948 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:02:54,948 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 36 [2024-06-28 01:02:54,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:02:55,029 INFO L124 PetriNetUnfolderBase]: 225/516 cut-off events. [2024-06-28 01:02:55,029 INFO L125 PetriNetUnfolderBase]: For 3688/3688 co-relation queries the response was YES. [2024-06-28 01:02:55,030 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1876 conditions, 516 events. 225/516 cut-off events. For 3688/3688 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2726 event pairs, 61 based on Foata normal form. 1/478 useless extension candidates. Maximal degree in co-relation 1837. Up to 392 conditions per place. [2024-06-28 01:02:55,032 INFO L140 encePairwiseOnDemand]: 28/36 looper letters, 56 selfloop transitions, 11 changer transitions 1/81 dead transitions. [2024-06-28 01:02:55,032 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 81 transitions, 674 flow [2024-06-28 01:02:55,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 01:02:55,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 01:02:55,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 148 transitions. [2024-06-28 01:02:55,045 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5873015873015873 [2024-06-28 01:02:55,045 INFO L175 Difference]: Start difference. First operand has 95 places, 73 transitions, 522 flow. Second operand 7 states and 148 transitions. [2024-06-28 01:02:55,045 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 81 transitions, 674 flow [2024-06-28 01:02:55,054 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 81 transitions, 606 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-28 01:02:55,055 INFO L231 Difference]: Finished difference. Result has 97 places, 72 transitions, 477 flow [2024-06-28 01:02:55,055 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=454, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=477, PETRI_PLACES=97, PETRI_TRANSITIONS=72} [2024-06-28 01:02:55,056 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 59 predicate places. [2024-06-28 01:02:55,056 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 72 transitions, 477 flow [2024-06-28 01:02:55,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:55,056 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:02:55,057 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:02:55,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-28 01:02:55,057 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:02:55,057 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:02:55,057 INFO L85 PathProgramCache]: Analyzing trace with hash -1513006056, now seen corresponding path program 2 times [2024-06-28 01:02:55,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:02:55,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521470033] [2024-06-28 01:02:55,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:02:55,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:02:55,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:02:55,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:02:55,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:02:55,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521470033] [2024-06-28 01:02:55,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521470033] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:02:55,135 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:02:55,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 01:02:55,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983625964] [2024-06-28 01:02:55,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:02:55,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 01:02:55,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:02:55,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 01:02:55,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-28 01:02:55,155 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 36 [2024-06-28 01:02:55,156 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 72 transitions, 477 flow. Second operand has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:55,156 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:02:55,156 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 36 [2024-06-28 01:02:55,156 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:02:55,233 INFO L124 PetriNetUnfolderBase]: 205/478 cut-off events. [2024-06-28 01:02:55,233 INFO L125 PetriNetUnfolderBase]: For 3974/3974 co-relation queries the response was YES. [2024-06-28 01:02:55,235 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1657 conditions, 478 events. 205/478 cut-off events. For 3974/3974 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 2465 event pairs, 63 based on Foata normal form. 2/457 useless extension candidates. Maximal degree in co-relation 1617. Up to 326 conditions per place. [2024-06-28 01:02:55,237 INFO L140 encePairwiseOnDemand]: 29/36 looper letters, 54 selfloop transitions, 17 changer transitions 0/84 dead transitions. [2024-06-28 01:02:55,237 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 84 transitions, 653 flow [2024-06-28 01:02:55,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 01:02:55,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 01:02:55,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 154 transitions. [2024-06-28 01:02:55,238 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6111111111111112 [2024-06-28 01:02:55,238 INFO L175 Difference]: Start difference. First operand has 97 places, 72 transitions, 477 flow. Second operand 7 states and 154 transitions. [2024-06-28 01:02:55,238 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 84 transitions, 653 flow [2024-06-28 01:02:55,245 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 84 transitions, 579 flow, removed 3 selfloop flow, removed 9 redundant places. [2024-06-28 01:02:55,246 INFO L231 Difference]: Finished difference. Result has 95 places, 73 transitions, 451 flow [2024-06-28 01:02:55,247 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=405, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=451, PETRI_PLACES=95, PETRI_TRANSITIONS=73} [2024-06-28 01:02:55,247 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 57 predicate places. [2024-06-28 01:02:55,248 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 73 transitions, 451 flow [2024-06-28 01:02:55,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:55,248 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:02:55,248 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:02:55,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-28 01:02:55,248 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:02:55,249 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:02:55,249 INFO L85 PathProgramCache]: Analyzing trace with hash -1866324968, now seen corresponding path program 3 times [2024-06-28 01:02:55,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:02:55,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496294616] [2024-06-28 01:02:55,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:02:55,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:02:55,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:02:55,342 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:02:55,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:02:55,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496294616] [2024-06-28 01:02:55,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496294616] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:02:55,343 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:02:55,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 01:02:55,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519399183] [2024-06-28 01:02:55,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:02:55,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 01:02:55,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:02:55,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 01:02:55,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-28 01:02:55,365 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 36 [2024-06-28 01:02:55,366 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 73 transitions, 451 flow. Second operand has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:55,366 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:02:55,366 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 36 [2024-06-28 01:02:55,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:02:55,464 INFO L124 PetriNetUnfolderBase]: 215/506 cut-off events. [2024-06-28 01:02:55,464 INFO L125 PetriNetUnfolderBase]: For 4198/4198 co-relation queries the response was YES. [2024-06-28 01:02:55,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1706 conditions, 506 events. 215/506 cut-off events. For 4198/4198 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 2664 event pairs, 67 based on Foata normal form. 2/485 useless extension candidates. Maximal degree in co-relation 1667. Up to 365 conditions per place. [2024-06-28 01:02:55,467 INFO L140 encePairwiseOnDemand]: 29/36 looper letters, 62 selfloop transitions, 10 changer transitions 0/85 dead transitions. [2024-06-28 01:02:55,467 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 85 transitions, 629 flow [2024-06-28 01:02:55,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 01:02:55,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 01:02:55,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 150 transitions. [2024-06-28 01:02:55,468 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5952380952380952 [2024-06-28 01:02:55,468 INFO L175 Difference]: Start difference. First operand has 95 places, 73 transitions, 451 flow. Second operand 7 states and 150 transitions. [2024-06-28 01:02:55,468 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 85 transitions, 629 flow [2024-06-28 01:02:55,477 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 85 transitions, 593 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-28 01:02:55,478 INFO L231 Difference]: Finished difference. Result has 97 places, 74 transitions, 449 flow [2024-06-28 01:02:55,478 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=415, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=449, PETRI_PLACES=97, PETRI_TRANSITIONS=74} [2024-06-28 01:02:55,478 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 59 predicate places. [2024-06-28 01:02:55,478 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 74 transitions, 449 flow [2024-06-28 01:02:55,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:55,479 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:02:55,479 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:02:55,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-28 01:02:55,479 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:02:55,480 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:02:55,480 INFO L85 PathProgramCache]: Analyzing trace with hash -453487746, now seen corresponding path program 4 times [2024-06-28 01:02:55,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:02:55,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043583993] [2024-06-28 01:02:55,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:02:55,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:02:55,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:02:55,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:02:55,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:02:55,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043583993] [2024-06-28 01:02:55,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043583993] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:02:55,559 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:02:55,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 01:02:55,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723840681] [2024-06-28 01:02:55,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:02:55,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 01:02:55,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:02:55,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 01:02:55,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-28 01:02:55,592 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 36 [2024-06-28 01:02:55,593 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 74 transitions, 449 flow. Second operand has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:55,593 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:02:55,593 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 36 [2024-06-28 01:02:55,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:02:55,665 INFO L124 PetriNetUnfolderBase]: 212/501 cut-off events. [2024-06-28 01:02:55,666 INFO L125 PetriNetUnfolderBase]: For 3829/3829 co-relation queries the response was YES. [2024-06-28 01:02:55,667 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1637 conditions, 501 events. 212/501 cut-off events. For 3829/3829 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 2629 event pairs, 58 based on Foata normal form. 2/482 useless extension candidates. Maximal degree in co-relation 1597. Up to 330 conditions per place. [2024-06-28 01:02:55,669 INFO L140 encePairwiseOnDemand]: 29/36 looper letters, 64 selfloop transitions, 12 changer transitions 0/89 dead transitions. [2024-06-28 01:02:55,669 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 89 transitions, 637 flow [2024-06-28 01:02:55,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 01:02:55,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 01:02:55,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 171 transitions. [2024-06-28 01:02:55,670 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.59375 [2024-06-28 01:02:55,670 INFO L175 Difference]: Start difference. First operand has 97 places, 74 transitions, 449 flow. Second operand 8 states and 171 transitions. [2024-06-28 01:02:55,670 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 89 transitions, 637 flow [2024-06-28 01:02:55,678 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 89 transitions, 613 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-28 01:02:55,679 INFO L231 Difference]: Finished difference. Result has 100 places, 74 transitions, 453 flow [2024-06-28 01:02:55,679 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=425, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=453, PETRI_PLACES=100, PETRI_TRANSITIONS=74} [2024-06-28 01:02:55,679 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 62 predicate places. [2024-06-28 01:02:55,680 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 74 transitions, 453 flow [2024-06-28 01:02:55,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:55,680 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:02:55,680 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:02:55,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-28 01:02:55,680 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:02:55,680 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:02:55,681 INFO L85 PathProgramCache]: Analyzing trace with hash -1649281769, now seen corresponding path program 1 times [2024-06-28 01:02:55,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:02:55,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704163619] [2024-06-28 01:02:55,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:02:55,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:02:55,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:02:55,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:02:55,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:02:55,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704163619] [2024-06-28 01:02:55,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704163619] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:02:55,762 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:02:55,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 01:02:55,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621878703] [2024-06-28 01:02:55,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:02:55,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 01:02:55,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:02:55,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 01:02:55,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 01:02:55,821 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 36 [2024-06-28 01:02:55,821 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 74 transitions, 453 flow. Second operand has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:55,821 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:02:55,821 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 36 [2024-06-28 01:02:55,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:02:55,927 INFO L124 PetriNetUnfolderBase]: 276/651 cut-off events. [2024-06-28 01:02:55,928 INFO L125 PetriNetUnfolderBase]: For 8634/8634 co-relation queries the response was YES. [2024-06-28 01:02:55,930 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2240 conditions, 651 events. 276/651 cut-off events. For 8634/8634 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 3817 event pairs, 86 based on Foata normal form. 6/630 useless extension candidates. Maximal degree in co-relation 2199. Up to 283 conditions per place. [2024-06-28 01:02:55,932 INFO L140 encePairwiseOnDemand]: 28/36 looper letters, 80 selfloop transitions, 12 changer transitions 0/105 dead transitions. [2024-06-28 01:02:55,932 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 105 transitions, 783 flow [2024-06-28 01:02:55,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 01:02:55,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 01:02:55,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 204 transitions. [2024-06-28 01:02:55,933 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6296296296296297 [2024-06-28 01:02:55,933 INFO L175 Difference]: Start difference. First operand has 100 places, 74 transitions, 453 flow. Second operand 9 states and 204 transitions. [2024-06-28 01:02:55,933 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 105 transitions, 783 flow [2024-06-28 01:02:55,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 105 transitions, 753 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-28 01:02:55,949 INFO L231 Difference]: Finished difference. Result has 103 places, 74 transitions, 450 flow [2024-06-28 01:02:55,949 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=423, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=450, PETRI_PLACES=103, PETRI_TRANSITIONS=74} [2024-06-28 01:02:55,949 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 65 predicate places. [2024-06-28 01:02:55,950 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 74 transitions, 450 flow [2024-06-28 01:02:55,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:55,950 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:02:55,950 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:02:55,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-28 01:02:55,950 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:02:55,950 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:02:55,951 INFO L85 PathProgramCache]: Analyzing trace with hash -1886357925, now seen corresponding path program 2 times [2024-06-28 01:02:55,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:02:55,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903779022] [2024-06-28 01:02:55,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:02:55,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:02:55,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:02:56,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:02:56,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:02:56,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903779022] [2024-06-28 01:02:56,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903779022] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:02:56,042 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:02:56,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 01:02:56,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628566808] [2024-06-28 01:02:56,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:02:56,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 01:02:56,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:02:56,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 01:02:56,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 01:02:56,074 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 36 [2024-06-28 01:02:56,074 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 74 transitions, 450 flow. Second operand has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:56,074 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:02:56,074 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 36 [2024-06-28 01:02:56,074 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:02:56,182 INFO L124 PetriNetUnfolderBase]: 298/708 cut-off events. [2024-06-28 01:02:56,183 INFO L125 PetriNetUnfolderBase]: For 9239/9239 co-relation queries the response was YES. [2024-06-28 01:02:56,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2366 conditions, 708 events. 298/708 cut-off events. For 9239/9239 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 4222 event pairs, 116 based on Foata normal form. 6/683 useless extension candidates. Maximal degree in co-relation 2324. Up to 379 conditions per place. [2024-06-28 01:02:56,186 INFO L140 encePairwiseOnDemand]: 28/36 looper letters, 77 selfloop transitions, 11 changer transitions 0/101 dead transitions. [2024-06-28 01:02:56,187 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 101 transitions, 764 flow [2024-06-28 01:02:56,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 01:02:56,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 01:02:56,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 183 transitions. [2024-06-28 01:02:56,188 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6354166666666666 [2024-06-28 01:02:56,189 INFO L175 Difference]: Start difference. First operand has 103 places, 74 transitions, 450 flow. Second operand 8 states and 183 transitions. [2024-06-28 01:02:56,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 101 transitions, 764 flow [2024-06-28 01:02:56,206 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 101 transitions, 724 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-28 01:02:56,207 INFO L231 Difference]: Finished difference. Result has 103 places, 74 transitions, 439 flow [2024-06-28 01:02:56,207 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=414, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=439, PETRI_PLACES=103, PETRI_TRANSITIONS=74} [2024-06-28 01:02:56,207 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 65 predicate places. [2024-06-28 01:02:56,208 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 74 transitions, 439 flow [2024-06-28 01:02:56,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:56,208 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:02:56,208 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:02:56,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-28 01:02:56,208 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:02:56,208 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:02:56,209 INFO L85 PathProgramCache]: Analyzing trace with hash -1881596325, now seen corresponding path program 3 times [2024-06-28 01:02:56,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:02:56,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497087104] [2024-06-28 01:02:56,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:02:56,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:02:56,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:02:56,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:02:56,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:02:56,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497087104] [2024-06-28 01:02:56,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497087104] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:02:56,288 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:02:56,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 01:02:56,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091060642] [2024-06-28 01:02:56,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:02:56,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 01:02:56,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:02:56,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 01:02:56,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 01:02:56,331 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 36 [2024-06-28 01:02:56,332 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 74 transitions, 439 flow. Second operand has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:56,332 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:02:56,332 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 36 [2024-06-28 01:02:56,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:02:56,427 INFO L124 PetriNetUnfolderBase]: 288/680 cut-off events. [2024-06-28 01:02:56,428 INFO L125 PetriNetUnfolderBase]: For 7289/7289 co-relation queries the response was YES. [2024-06-28 01:02:56,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2035 conditions, 680 events. 288/680 cut-off events. For 7289/7289 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 4060 event pairs, 128 based on Foata normal form. 8/656 useless extension candidates. Maximal degree in co-relation 1993. Up to 445 conditions per place. [2024-06-28 01:02:56,431 INFO L140 encePairwiseOnDemand]: 28/36 looper letters, 71 selfloop transitions, 11 changer transitions 0/95 dead transitions. [2024-06-28 01:02:56,432 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 95 transitions, 663 flow [2024-06-28 01:02:56,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 01:02:56,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 01:02:56,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 177 transitions. [2024-06-28 01:02:56,433 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6145833333333334 [2024-06-28 01:02:56,433 INFO L175 Difference]: Start difference. First operand has 103 places, 74 transitions, 439 flow. Second operand 8 states and 177 transitions. [2024-06-28 01:02:56,433 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 95 transitions, 663 flow [2024-06-28 01:02:56,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 95 transitions, 642 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-28 01:02:56,446 INFO L231 Difference]: Finished difference. Result has 105 places, 74 transitions, 444 flow [2024-06-28 01:02:56,446 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=418, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=444, PETRI_PLACES=105, PETRI_TRANSITIONS=74} [2024-06-28 01:02:56,446 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 67 predicate places. [2024-06-28 01:02:56,447 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 74 transitions, 444 flow [2024-06-28 01:02:56,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:56,447 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:02:56,447 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:02:56,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-28 01:02:56,447 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:02:56,448 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:02:56,448 INFO L85 PathProgramCache]: Analyzing trace with hash 226683065, now seen corresponding path program 4 times [2024-06-28 01:02:56,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:02:56,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547000379] [2024-06-28 01:02:56,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:02:56,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:02:56,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:02:56,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:02:56,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:02:56,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547000379] [2024-06-28 01:02:56,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547000379] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:02:56,550 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:02:56,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 01:02:56,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995107826] [2024-06-28 01:02:56,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:02:56,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 01:02:56,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:02:56,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 01:02:56,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-28 01:02:56,602 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 36 [2024-06-28 01:02:56,602 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 74 transitions, 444 flow. Second operand has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:56,602 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:02:56,603 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 36 [2024-06-28 01:02:56,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:02:56,740 INFO L124 PetriNetUnfolderBase]: 320/757 cut-off events. [2024-06-28 01:02:56,741 INFO L125 PetriNetUnfolderBase]: For 7799/7799 co-relation queries the response was YES. [2024-06-28 01:02:56,743 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2235 conditions, 757 events. 320/757 cut-off events. For 7799/7799 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 4691 event pairs, 156 based on Foata normal form. 8/728 useless extension candidates. Maximal degree in co-relation 2192. Up to 467 conditions per place. [2024-06-28 01:02:56,745 INFO L140 encePairwiseOnDemand]: 28/36 looper letters, 50 selfloop transitions, 29 changer transitions 0/92 dead transitions. [2024-06-28 01:02:56,745 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 92 transitions, 654 flow [2024-06-28 01:02:56,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 01:02:56,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 01:02:56,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 182 transitions. [2024-06-28 01:02:56,746 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6319444444444444 [2024-06-28 01:02:56,747 INFO L175 Difference]: Start difference. First operand has 105 places, 74 transitions, 444 flow. Second operand 8 states and 182 transitions. [2024-06-28 01:02:56,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 92 transitions, 654 flow [2024-06-28 01:02:56,759 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 92 transitions, 634 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-28 01:02:56,760 INFO L231 Difference]: Finished difference. Result has 107 places, 74 transitions, 486 flow [2024-06-28 01:02:56,761 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=424, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=486, PETRI_PLACES=107, PETRI_TRANSITIONS=74} [2024-06-28 01:02:56,761 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 69 predicate places. [2024-06-28 01:02:56,762 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 74 transitions, 486 flow [2024-06-28 01:02:56,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:56,762 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:02:56,762 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:02:56,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-28 01:02:56,762 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:02:56,764 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:02:56,764 INFO L85 PathProgramCache]: Analyzing trace with hash -1919655845, now seen corresponding path program 5 times [2024-06-28 01:02:56,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:02:56,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195749752] [2024-06-28 01:02:56,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:02:56,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:02:56,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:02:56,841 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:02:56,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:02:56,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195749752] [2024-06-28 01:02:56,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195749752] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:02:56,842 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:02:56,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 01:02:56,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93369151] [2024-06-28 01:02:56,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:02:56,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 01:02:56,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:02:56,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 01:02:56,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 01:02:56,883 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 36 [2024-06-28 01:02:56,883 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 74 transitions, 486 flow. Second operand has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:56,884 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:02:56,884 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 36 [2024-06-28 01:02:56,884 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:02:57,012 INFO L124 PetriNetUnfolderBase]: 384/913 cut-off events. [2024-06-28 01:02:57,012 INFO L125 PetriNetUnfolderBase]: For 11212/11215 co-relation queries the response was YES. [2024-06-28 01:02:57,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2893 conditions, 913 events. 384/913 cut-off events. For 11212/11215 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 6008 event pairs, 188 based on Foata normal form. 6/875 useless extension candidates. Maximal degree in co-relation 2849. Up to 443 conditions per place. [2024-06-28 01:02:57,017 INFO L140 encePairwiseOnDemand]: 28/36 looper letters, 56 selfloop transitions, 29 changer transitions 0/98 dead transitions. [2024-06-28 01:02:57,017 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 98 transitions, 788 flow [2024-06-28 01:02:57,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 01:02:57,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 01:02:57,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 187 transitions. [2024-06-28 01:02:57,018 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6493055555555556 [2024-06-28 01:02:57,018 INFO L175 Difference]: Start difference. First operand has 107 places, 74 transitions, 486 flow. Second operand 8 states and 187 transitions. [2024-06-28 01:02:57,018 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 98 transitions, 788 flow [2024-06-28 01:02:57,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 98 transitions, 732 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-28 01:02:57,036 INFO L231 Difference]: Finished difference. Result has 109 places, 74 transitions, 491 flow [2024-06-28 01:02:57,036 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=430, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=491, PETRI_PLACES=109, PETRI_TRANSITIONS=74} [2024-06-28 01:02:57,036 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 71 predicate places. [2024-06-28 01:02:57,036 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 74 transitions, 491 flow [2024-06-28 01:02:57,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:57,037 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:02:57,037 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:02:57,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-28 01:02:57,037 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:02:57,037 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:02:57,037 INFO L85 PathProgramCache]: Analyzing trace with hash -1691577065, now seen corresponding path program 6 times [2024-06-28 01:02:57,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:02:57,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466154693] [2024-06-28 01:02:57,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:02:57,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:02:57,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:02:57,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:02:57,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:02:57,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466154693] [2024-06-28 01:02:57,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466154693] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:02:57,141 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:02:57,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 01:02:57,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943550300] [2024-06-28 01:02:57,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:02:57,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 01:02:57,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:02:57,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 01:02:57,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-28 01:02:57,171 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 36 [2024-06-28 01:02:57,172 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 74 transitions, 491 flow. Second operand has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:57,172 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:02:57,172 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 36 [2024-06-28 01:02:57,172 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:02:57,299 INFO L124 PetriNetUnfolderBase]: 374/885 cut-off events. [2024-06-28 01:02:57,299 INFO L125 PetriNetUnfolderBase]: For 8893/8896 co-relation queries the response was YES. [2024-06-28 01:02:57,301 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2608 conditions, 885 events. 374/885 cut-off events. For 8893/8896 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 5848 event pairs, 200 based on Foata normal form. 8/848 useless extension candidates. Maximal degree in co-relation 2563. Up to 577 conditions per place. [2024-06-28 01:02:57,303 INFO L140 encePairwiseOnDemand]: 28/36 looper letters, 49 selfloop transitions, 30 changer transitions 0/92 dead transitions. [2024-06-28 01:02:57,303 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 92 transitions, 701 flow [2024-06-28 01:02:57,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 01:02:57,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 01:02:57,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 181 transitions. [2024-06-28 01:02:57,304 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6284722222222222 [2024-06-28 01:02:57,304 INFO L175 Difference]: Start difference. First operand has 109 places, 74 transitions, 491 flow. Second operand 8 states and 181 transitions. [2024-06-28 01:02:57,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 92 transitions, 701 flow [2024-06-28 01:02:57,316 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 92 transitions, 644 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-28 01:02:57,318 INFO L231 Difference]: Finished difference. Result has 111 places, 74 transitions, 498 flow [2024-06-28 01:02:57,318 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=434, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=498, PETRI_PLACES=111, PETRI_TRANSITIONS=74} [2024-06-28 01:02:57,318 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 73 predicate places. [2024-06-28 01:02:57,318 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 74 transitions, 498 flow [2024-06-28 01:02:57,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:57,319 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:02:57,319 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:02:57,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-28 01:02:57,319 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:02:57,319 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:02:57,319 INFO L85 PathProgramCache]: Analyzing trace with hash -1691331111, now seen corresponding path program 1 times [2024-06-28 01:02:57,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:02:57,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324383406] [2024-06-28 01:02:57,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:02:57,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:02:57,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:02:57,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:02:57,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:02:57,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324383406] [2024-06-28 01:02:57,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324383406] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:02:57,400 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:02:57,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 01:02:57,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937015336] [2024-06-28 01:02:57,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:02:57,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 01:02:57,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:02:57,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 01:02:57,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 01:02:57,430 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 36 [2024-06-28 01:02:57,431 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 74 transitions, 498 flow. Second operand has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:57,431 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:02:57,431 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 36 [2024-06-28 01:02:57,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:02:57,559 INFO L124 PetriNetUnfolderBase]: 396/948 cut-off events. [2024-06-28 01:02:57,560 INFO L125 PetriNetUnfolderBase]: For 8289/8295 co-relation queries the response was YES. [2024-06-28 01:02:57,562 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2760 conditions, 948 events. 396/948 cut-off events. For 8289/8295 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 6402 event pairs, 202 based on Foata normal form. 6/905 useless extension candidates. Maximal degree in co-relation 2714. Up to 421 conditions per place. [2024-06-28 01:02:57,564 INFO L140 encePairwiseOnDemand]: 28/36 looper letters, 54 selfloop transitions, 30 changer transitions 0/97 dead transitions. [2024-06-28 01:02:57,564 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 97 transitions, 736 flow [2024-06-28 01:02:57,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 01:02:57,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 01:02:57,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 185 transitions. [2024-06-28 01:02:57,565 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6423611111111112 [2024-06-28 01:02:57,565 INFO L175 Difference]: Start difference. First operand has 111 places, 74 transitions, 498 flow. Second operand 8 states and 185 transitions. [2024-06-28 01:02:57,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 97 transitions, 736 flow [2024-06-28 01:02:57,581 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 97 transitions, 678 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-28 01:02:57,582 INFO L231 Difference]: Finished difference. Result has 113 places, 74 transitions, 503 flow [2024-06-28 01:02:57,583 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=440, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=503, PETRI_PLACES=113, PETRI_TRANSITIONS=74} [2024-06-28 01:02:57,583 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 75 predicate places. [2024-06-28 01:02:57,583 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 74 transitions, 503 flow [2024-06-28 01:02:57,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:57,583 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:02:57,583 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:02:57,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-28 01:02:57,584 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:02:57,584 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:02:57,584 INFO L85 PathProgramCache]: Analyzing trace with hash 323892729, now seen corresponding path program 7 times [2024-06-28 01:02:57,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:02:57,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380165516] [2024-06-28 01:02:57,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:02:57,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:02:57,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:02:57,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:02:57,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:02:57,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380165516] [2024-06-28 01:02:57,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380165516] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:02:57,667 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:02:57,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 01:02:57,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252093726] [2024-06-28 01:02:57,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:02:57,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 01:02:57,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:02:57,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 01:02:57,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-28 01:02:57,699 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 36 [2024-06-28 01:02:57,699 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 74 transitions, 503 flow. Second operand has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:57,699 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:02:57,699 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 36 [2024-06-28 01:02:57,699 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:02:57,805 INFO L124 PetriNetUnfolderBase]: 428/1009 cut-off events. [2024-06-28 01:02:57,805 INFO L125 PetriNetUnfolderBase]: For 10099/10105 co-relation queries the response was YES. [2024-06-28 01:02:57,808 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2952 conditions, 1009 events. 428/1009 cut-off events. For 10099/10105 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 7026 event pairs, 250 based on Foata normal form. 8/962 useless extension candidates. Maximal degree in co-relation 2905. Up to 687 conditions per place. [2024-06-28 01:02:57,810 INFO L140 encePairwiseOnDemand]: 28/36 looper letters, 47 selfloop transitions, 29 changer transitions 0/89 dead transitions. [2024-06-28 01:02:57,810 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 89 transitions, 699 flow [2024-06-28 01:02:57,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 01:02:57,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 01:02:57,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 179 transitions. [2024-06-28 01:02:57,811 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6215277777777778 [2024-06-28 01:02:57,811 INFO L175 Difference]: Start difference. First operand has 113 places, 74 transitions, 503 flow. Second operand 8 states and 179 transitions. [2024-06-28 01:02:57,811 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 89 transitions, 699 flow [2024-06-28 01:02:57,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 89 transitions, 640 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-28 01:02:57,831 INFO L231 Difference]: Finished difference. Result has 115 places, 74 transitions, 506 flow [2024-06-28 01:02:57,831 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=444, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=506, PETRI_PLACES=115, PETRI_TRANSITIONS=74} [2024-06-28 01:02:57,831 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 77 predicate places. [2024-06-28 01:02:57,831 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 74 transitions, 506 flow [2024-06-28 01:02:57,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:57,832 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:02:57,832 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:02:57,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-28 01:02:57,832 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:02:57,832 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:02:57,833 INFO L85 PathProgramCache]: Analyzing trace with hash -124742377, now seen corresponding path program 8 times [2024-06-28 01:02:57,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:02:57,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661899672] [2024-06-28 01:02:57,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:02:57,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:02:57,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:02:57,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:02:57,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:02:57,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661899672] [2024-06-28 01:02:57,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661899672] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:02:57,927 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:02:57,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 01:02:57,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690778776] [2024-06-28 01:02:57,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:02:57,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 01:02:57,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:02:57,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 01:02:57,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-28 01:02:57,958 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 36 [2024-06-28 01:02:57,958 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 74 transitions, 506 flow. Second operand has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:57,958 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:02:57,958 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 36 [2024-06-28 01:02:57,958 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:02:58,066 INFO L124 PetriNetUnfolderBase]: 460/1086 cut-off events. [2024-06-28 01:02:58,067 INFO L125 PetriNetUnfolderBase]: For 10685/10691 co-relation queries the response was YES. [2024-06-28 01:02:58,069 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3147 conditions, 1086 events. 460/1086 cut-off events. For 10685/10691 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 7716 event pairs, 276 based on Foata normal form. 8/1035 useless extension candidates. Maximal degree in co-relation 3099. Up to 751 conditions per place. [2024-06-28 01:02:58,074 INFO L140 encePairwiseOnDemand]: 28/36 looper letters, 46 selfloop transitions, 30 changer transitions 0/89 dead transitions. [2024-06-28 01:02:58,074 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 89 transitions, 702 flow [2024-06-28 01:02:58,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 01:02:58,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 01:02:58,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 178 transitions. [2024-06-28 01:02:58,075 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6180555555555556 [2024-06-28 01:02:58,075 INFO L175 Difference]: Start difference. First operand has 115 places, 74 transitions, 506 flow. Second operand 8 states and 178 transitions. [2024-06-28 01:02:58,075 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 89 transitions, 702 flow [2024-06-28 01:02:58,097 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 89 transitions, 646 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-28 01:02:58,098 INFO L231 Difference]: Finished difference. Result has 117 places, 74 transitions, 514 flow [2024-06-28 01:02:58,098 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=450, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=514, PETRI_PLACES=117, PETRI_TRANSITIONS=74} [2024-06-28 01:02:58,099 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 79 predicate places. [2024-06-28 01:02:58,099 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 74 transitions, 514 flow [2024-06-28 01:02:58,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:58,099 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:02:58,099 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:02:58,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-28 01:02:58,099 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:02:58,100 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:02:58,100 INFO L85 PathProgramCache]: Analyzing trace with hash -835231, now seen corresponding path program 9 times [2024-06-28 01:02:58,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:02:58,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731081099] [2024-06-28 01:02:58,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:02:58,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:02:58,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:02:58,200 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:02:58,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:02:58,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731081099] [2024-06-28 01:02:58,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731081099] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:02:58,200 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:02:58,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 01:02:58,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887637604] [2024-06-28 01:02:58,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:02:58,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 01:02:58,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:02:58,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 01:02:58,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 01:02:58,233 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 36 [2024-06-28 01:02:58,234 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 74 transitions, 514 flow. Second operand has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:58,234 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:02:58,234 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 36 [2024-06-28 01:02:58,234 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:02:58,358 INFO L124 PetriNetUnfolderBase]: 511/1211 cut-off events. [2024-06-28 01:02:58,359 INFO L125 PetriNetUnfolderBase]: For 13894/13903 co-relation queries the response was YES. [2024-06-28 01:02:58,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3666 conditions, 1211 events. 511/1211 cut-off events. For 13894/13903 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 8785 event pairs, 299 based on Foata normal form. 6/1153 useless extension candidates. Maximal degree in co-relation 3617. Up to 636 conditions per place. [2024-06-28 01:02:58,365 INFO L140 encePairwiseOnDemand]: 28/36 looper letters, 52 selfloop transitions, 30 changer transitions 0/95 dead transitions. [2024-06-28 01:02:58,365 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 95 transitions, 812 flow [2024-06-28 01:02:58,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 01:02:58,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 01:02:58,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 183 transitions. [2024-06-28 01:02:58,366 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6354166666666666 [2024-06-28 01:02:58,366 INFO L175 Difference]: Start difference. First operand has 117 places, 74 transitions, 514 flow. Second operand 8 states and 183 transitions. [2024-06-28 01:02:58,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 95 transitions, 812 flow [2024-06-28 01:02:58,396 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 95 transitions, 754 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-28 01:02:58,397 INFO L231 Difference]: Finished difference. Result has 119 places, 74 transitions, 519 flow [2024-06-28 01:02:58,397 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=456, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=519, PETRI_PLACES=119, PETRI_TRANSITIONS=74} [2024-06-28 01:02:58,398 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 81 predicate places. [2024-06-28 01:02:58,398 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 74 transitions, 519 flow [2024-06-28 01:02:58,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:58,398 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:02:58,398 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:02:58,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-28 01:02:58,398 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:02:58,398 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:02:58,398 INFO L85 PathProgramCache]: Analyzing trace with hash -492329469, now seen corresponding path program 10 times [2024-06-28 01:02:58,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:02:58,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340600166] [2024-06-28 01:02:58,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:02:58,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:02:58,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:02:58,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:02:58,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:02:58,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340600166] [2024-06-28 01:02:58,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340600166] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:02:58,482 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:02:58,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 01:02:58,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461453790] [2024-06-28 01:02:58,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:02:58,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 01:02:58,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:02:58,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 01:02:58,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 01:02:58,514 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 36 [2024-06-28 01:02:58,515 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 74 transitions, 519 flow. Second operand has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:58,515 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:02:58,515 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 36 [2024-06-28 01:02:58,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:02:58,639 INFO L124 PetriNetUnfolderBase]: 501/1187 cut-off events. [2024-06-28 01:02:58,639 INFO L125 PetriNetUnfolderBase]: For 10569/10578 co-relation queries the response was YES. [2024-06-28 01:02:58,642 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3343 conditions, 1187 events. 501/1187 cut-off events. For 10569/10578 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 8578 event pairs, 303 based on Foata normal form. 8/1134 useless extension candidates. Maximal degree in co-relation 3293. Up to 892 conditions per place. [2024-06-28 01:02:58,645 INFO L140 encePairwiseOnDemand]: 28/36 looper letters, 65 selfloop transitions, 11 changer transitions 0/89 dead transitions. [2024-06-28 01:02:58,645 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 89 transitions, 715 flow [2024-06-28 01:02:58,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 01:02:58,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 01:02:58,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 171 transitions. [2024-06-28 01:02:58,650 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.59375 [2024-06-28 01:02:58,650 INFO L175 Difference]: Start difference. First operand has 119 places, 74 transitions, 519 flow. Second operand 8 states and 171 transitions. [2024-06-28 01:02:58,650 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 89 transitions, 715 flow [2024-06-28 01:02:58,666 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 89 transitions, 656 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-28 01:02:58,667 INFO L231 Difference]: Finished difference. Result has 121 places, 74 transitions, 486 flow [2024-06-28 01:02:58,667 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=460, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=486, PETRI_PLACES=121, PETRI_TRANSITIONS=74} [2024-06-28 01:02:58,668 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 83 predicate places. [2024-06-28 01:02:58,668 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 74 transitions, 486 flow [2024-06-28 01:02:58,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:58,668 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:02:58,668 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:02:58,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-28 01:02:58,669 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:02:58,669 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:02:58,669 INFO L85 PathProgramCache]: Analyzing trace with hash 2123793537, now seen corresponding path program 2 times [2024-06-28 01:02:58,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:02:58,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320537779] [2024-06-28 01:02:58,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:02:58,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:02:58,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:02:58,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:02:58,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:02:58,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320537779] [2024-06-28 01:02:58,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320537779] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:02:58,742 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:02:58,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 01:02:58,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650824103] [2024-06-28 01:02:58,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:02:58,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 01:02:58,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:02:58,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 01:02:58,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 01:02:58,778 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 36 [2024-06-28 01:02:58,778 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 74 transitions, 486 flow. Second operand has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:58,778 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:02:58,778 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 36 [2024-06-28 01:02:58,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:02:58,905 INFO L124 PetriNetUnfolderBase]: 523/1237 cut-off events. [2024-06-28 01:02:58,905 INFO L125 PetriNetUnfolderBase]: For 9496/9505 co-relation queries the response was YES. [2024-06-28 01:02:58,908 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3440 conditions, 1237 events. 523/1237 cut-off events. For 9496/9505 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 9163 event pairs, 311 based on Foata normal form. 6/1178 useless extension candidates. Maximal degree in co-relation 3389. Up to 750 conditions per place. [2024-06-28 01:02:58,911 INFO L140 encePairwiseOnDemand]: 28/36 looper letters, 52 selfloop transitions, 29 changer transitions 0/94 dead transitions. [2024-06-28 01:02:58,911 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 94 transitions, 710 flow [2024-06-28 01:02:58,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 01:02:58,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 01:02:58,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 183 transitions. [2024-06-28 01:02:58,912 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6354166666666666 [2024-06-28 01:02:58,912 INFO L175 Difference]: Start difference. First operand has 121 places, 74 transitions, 486 flow. Second operand 8 states and 183 transitions. [2024-06-28 01:02:58,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 94 transitions, 710 flow [2024-06-28 01:02:58,933 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 94 transitions, 690 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-28 01:02:58,934 INFO L231 Difference]: Finished difference. Result has 123 places, 74 transitions, 527 flow [2024-06-28 01:02:58,934 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=466, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=527, PETRI_PLACES=123, PETRI_TRANSITIONS=74} [2024-06-28 01:02:58,935 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 85 predicate places. [2024-06-28 01:02:58,935 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 74 transitions, 527 flow [2024-06-28 01:02:58,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:58,935 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:02:58,935 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:02:58,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-28 01:02:58,936 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:02:58,936 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:02:58,936 INFO L85 PathProgramCache]: Analyzing trace with hash -1402159015, now seen corresponding path program 3 times [2024-06-28 01:02:58,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:02:58,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323829691] [2024-06-28 01:02:58,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:02:58,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:02:58,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:02:59,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:02:59,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:02:59,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323829691] [2024-06-28 01:02:59,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323829691] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:02:59,023 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:02:59,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 01:02:59,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188558580] [2024-06-28 01:02:59,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:02:59,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 01:02:59,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:02:59,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 01:02:59,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 01:02:59,085 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 36 [2024-06-28 01:02:59,085 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 74 transitions, 527 flow. Second operand has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:59,085 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:02:59,086 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 36 [2024-06-28 01:02:59,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:02:59,247 INFO L124 PetriNetUnfolderBase]: 545/1295 cut-off events. [2024-06-28 01:02:59,248 INFO L125 PetriNetUnfolderBase]: For 10107/10116 co-relation queries the response was YES. [2024-06-28 01:02:59,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3627 conditions, 1295 events. 545/1295 cut-off events. For 10107/10116 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 9656 event pairs, 327 based on Foata normal form. 6/1240 useless extension candidates. Maximal degree in co-relation 3575. Up to 918 conditions per place. [2024-06-28 01:02:59,254 INFO L140 encePairwiseOnDemand]: 28/36 looper letters, 70 selfloop transitions, 11 changer transitions 0/94 dead transitions. [2024-06-28 01:02:59,254 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 94 transitions, 751 flow [2024-06-28 01:02:59,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 01:02:59,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 01:02:59,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 176 transitions. [2024-06-28 01:02:59,257 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6111111111111112 [2024-06-28 01:02:59,257 INFO L175 Difference]: Start difference. First operand has 123 places, 74 transitions, 527 flow. Second operand 8 states and 176 transitions. [2024-06-28 01:02:59,257 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 94 transitions, 751 flow [2024-06-28 01:02:59,280 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 94 transitions, 694 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-28 01:02:59,281 INFO L231 Difference]: Finished difference. Result has 125 places, 74 transitions, 495 flow [2024-06-28 01:02:59,281 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=470, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=495, PETRI_PLACES=125, PETRI_TRANSITIONS=74} [2024-06-28 01:02:59,281 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 87 predicate places. [2024-06-28 01:02:59,282 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 74 transitions, 495 flow [2024-06-28 01:02:59,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:59,282 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:02:59,282 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:02:59,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-28 01:02:59,282 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:02:59,282 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:02:59,283 INFO L85 PathProgramCache]: Analyzing trace with hash -196864315, now seen corresponding path program 4 times [2024-06-28 01:02:59,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:02:59,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035896796] [2024-06-28 01:02:59,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:02:59,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:02:59,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:02:59,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:02:59,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:02:59,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035896796] [2024-06-28 01:02:59,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035896796] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:02:59,360 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:02:59,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 01:02:59,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650298434] [2024-06-28 01:02:59,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:02:59,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 01:02:59,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:02:59,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 01:02:59,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 01:02:59,400 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 36 [2024-06-28 01:02:59,400 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 74 transitions, 495 flow. Second operand has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:59,400 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:02:59,400 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 36 [2024-06-28 01:02:59,400 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:02:59,551 INFO L124 PetriNetUnfolderBase]: 538/1282 cut-off events. [2024-06-28 01:02:59,551 INFO L125 PetriNetUnfolderBase]: For 5823/5832 co-relation queries the response was YES. [2024-06-28 01:02:59,555 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3334 conditions, 1282 events. 538/1282 cut-off events. For 5823/5832 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 9529 event pairs, 312 based on Foata normal form. 6/1227 useless extension candidates. Maximal degree in co-relation 3281. Up to 821 conditions per place. [2024-06-28 01:02:59,558 INFO L140 encePairwiseOnDemand]: 28/36 looper letters, 72 selfloop transitions, 12 changer transitions 0/97 dead transitions. [2024-06-28 01:02:59,559 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 97 transitions, 653 flow [2024-06-28 01:02:59,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 01:02:59,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 01:02:59,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 196 transitions. [2024-06-28 01:02:59,560 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6049382716049383 [2024-06-28 01:02:59,560 INFO L175 Difference]: Start difference. First operand has 125 places, 74 transitions, 495 flow. Second operand 9 states and 196 transitions. [2024-06-28 01:02:59,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 97 transitions, 653 flow [2024-06-28 01:02:59,566 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 97 transitions, 524 flow, removed 8 selfloop flow, removed 46 redundant places. [2024-06-28 01:02:59,567 INFO L231 Difference]: Finished difference. Result has 86 places, 73 transitions, 318 flow [2024-06-28 01:02:59,567 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=294, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=318, PETRI_PLACES=86, PETRI_TRANSITIONS=73} [2024-06-28 01:02:59,570 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 48 predicate places. [2024-06-28 01:02:59,570 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 73 transitions, 318 flow [2024-06-28 01:02:59,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:59,571 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:02:59,571 INFO 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] [2024-06-28 01:02:59,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-28 01:02:59,571 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:02:59,571 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:02:59,571 INFO L85 PathProgramCache]: Analyzing trace with hash -389926156, now seen corresponding path program 1 times [2024-06-28 01:02:59,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:02:59,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548114921] [2024-06-28 01:02:59,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:02:59,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:02:59,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:02:59,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:02:59,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:02:59,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548114921] [2024-06-28 01:02:59,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548114921] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:02:59,644 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:02:59,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 01:02:59,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169871850] [2024-06-28 01:02:59,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:02:59,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 01:02:59,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:02:59,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 01:02:59,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-28 01:02:59,657 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 36 [2024-06-28 01:02:59,657 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 73 transitions, 318 flow. Second operand has 5 states, 5 states have (on average 23.0) internal successors, (115), 5 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:59,657 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:02:59,657 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 36 [2024-06-28 01:02:59,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:02:59,729 INFO L124 PetriNetUnfolderBase]: 410/1182 cut-off events. [2024-06-28 01:02:59,730 INFO L125 PetriNetUnfolderBase]: For 254/254 co-relation queries the response was YES. [2024-06-28 01:02:59,731 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2432 conditions, 1182 events. 410/1182 cut-off events. For 254/254 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 8651 event pairs, 20 based on Foata normal form. 96/1226 useless extension candidates. Maximal degree in co-relation 2419. Up to 344 conditions per place. [2024-06-28 01:02:59,733 INFO L140 encePairwiseOnDemand]: 31/36 looper letters, 18 selfloop transitions, 24 changer transitions 1/83 dead transitions. [2024-06-28 01:02:59,733 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 83 transitions, 427 flow [2024-06-28 01:02:59,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 01:02:59,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 01:02:59,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 132 transitions. [2024-06-28 01:02:59,734 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7333333333333333 [2024-06-28 01:02:59,734 INFO L175 Difference]: Start difference. First operand has 86 places, 73 transitions, 318 flow. Second operand 5 states and 132 transitions. [2024-06-28 01:02:59,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 83 transitions, 427 flow [2024-06-28 01:02:59,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 83 transitions, 404 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-28 01:02:59,736 INFO L231 Difference]: Finished difference. Result has 85 places, 73 transitions, 372 flow [2024-06-28 01:02:59,736 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=295, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=372, PETRI_PLACES=85, PETRI_TRANSITIONS=73} [2024-06-28 01:02:59,737 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 47 predicate places. [2024-06-28 01:02:59,737 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 73 transitions, 372 flow [2024-06-28 01:02:59,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.0) internal successors, (115), 5 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:59,737 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:02:59,738 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:02:59,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-28 01:02:59,738 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:02:59,738 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:02:59,738 INFO L85 PathProgramCache]: Analyzing trace with hash 83925683, now seen corresponding path program 1 times [2024-06-28 01:02:59,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:02:59,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725987880] [2024-06-28 01:02:59,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:02:59,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:02:59,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:02:59,824 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:02:59,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:02:59,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725987880] [2024-06-28 01:02:59,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725987880] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:02:59,824 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:02:59,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 01:02:59,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341845423] [2024-06-28 01:02:59,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:02:59,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 01:02:59,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:02:59,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 01:02:59,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-06-28 01:02:59,844 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 36 [2024-06-28 01:02:59,844 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 73 transitions, 372 flow. Second operand has 6 states, 6 states have (on average 22.0) internal successors, (132), 6 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:59,844 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:02:59,844 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 36 [2024-06-28 01:02:59,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:02:59,930 INFO L124 PetriNetUnfolderBase]: 303/869 cut-off events. [2024-06-28 01:02:59,930 INFO L125 PetriNetUnfolderBase]: For 480/480 co-relation queries the response was YES. [2024-06-28 01:02:59,932 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2099 conditions, 869 events. 303/869 cut-off events. For 480/480 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 5831 event pairs, 96 based on Foata normal form. 44/833 useless extension candidates. Maximal degree in co-relation 2084. Up to 259 conditions per place. [2024-06-28 01:02:59,933 INFO L140 encePairwiseOnDemand]: 31/36 looper letters, 15 selfloop transitions, 2 changer transitions 50/88 dead transitions. [2024-06-28 01:02:59,933 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 88 transitions, 492 flow [2024-06-28 01:02:59,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 01:02:59,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 01:02:59,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 151 transitions. [2024-06-28 01:02:59,933 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6990740740740741 [2024-06-28 01:02:59,934 INFO L175 Difference]: Start difference. First operand has 85 places, 73 transitions, 372 flow. Second operand 6 states and 151 transitions. [2024-06-28 01:02:59,934 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 88 transitions, 492 flow [2024-06-28 01:02:59,936 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 88 transitions, 386 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-28 01:02:59,936 INFO L231 Difference]: Finished difference. Result has 87 places, 36 transitions, 118 flow [2024-06-28 01:02:59,937 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=272, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=118, PETRI_PLACES=87, PETRI_TRANSITIONS=36} [2024-06-28 01:02:59,937 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 49 predicate places. [2024-06-28 01:02:59,937 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 36 transitions, 118 flow [2024-06-28 01:02:59,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.0) internal successors, (132), 6 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:59,937 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:02:59,937 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:02:59,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-28 01:02:59,938 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:02:59,938 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:02:59,938 INFO L85 PathProgramCache]: Analyzing trace with hash 842537467, now seen corresponding path program 2 times [2024-06-28 01:02:59,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:02:59,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174430590] [2024-06-28 01:02:59,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:02:59,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:02:59,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:03:00,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:03:00,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:03:00,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174430590] [2024-06-28 01:03:00,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174430590] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:03:00,025 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:03:00,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 01:03:00,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393378625] [2024-06-28 01:03:00,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:03:00,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 01:03:00,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:03:00,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 01:03:00,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-06-28 01:03:00,046 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 36 [2024-06-28 01:03:00,046 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 36 transitions, 118 flow. Second operand has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 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) [2024-06-28 01:03:00,047 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:03:00,047 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 36 [2024-06-28 01:03:00,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:03:00,100 INFO L124 PetriNetUnfolderBase]: 65/195 cut-off events. [2024-06-28 01:03:00,100 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2024-06-28 01:03:00,100 INFO L83 FinitePrefix]: Finished finitePrefix Result has 419 conditions, 195 events. 65/195 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 759 event pairs, 10 based on Foata normal form. 12/190 useless extension candidates. Maximal degree in co-relation 413. Up to 73 conditions per place. [2024-06-28 01:03:00,101 INFO L140 encePairwiseOnDemand]: 31/36 looper letters, 0 selfloop transitions, 0 changer transitions 41/41 dead transitions. [2024-06-28 01:03:00,101 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 41 transitions, 172 flow [2024-06-28 01:03:00,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 01:03:00,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 01:03:00,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 136 transitions. [2024-06-28 01:03:00,101 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6296296296296297 [2024-06-28 01:03:00,101 INFO L175 Difference]: Start difference. First operand has 87 places, 36 transitions, 118 flow. Second operand 6 states and 136 transitions. [2024-06-28 01:03:00,102 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 41 transitions, 172 flow [2024-06-28 01:03:00,102 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 41 transitions, 162 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-28 01:03:00,103 INFO L231 Difference]: Finished difference. Result has 50 places, 0 transitions, 0 flow [2024-06-28 01:03:00,103 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=0, PETRI_PLACES=50, PETRI_TRANSITIONS=0} [2024-06-28 01:03:00,104 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 12 predicate places. [2024-06-28 01:03:00,104 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 0 transitions, 0 flow [2024-06-28 01:03:00,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 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) [2024-06-28 01:03:00,107 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (4 of 5 remaining) [2024-06-28 01:03:00,108 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 5 remaining) [2024-06-28 01:03:00,108 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2024-06-28 01:03:00,110 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 5 remaining) [2024-06-28 01:03:00,110 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 5 remaining) [2024-06-28 01:03:00,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-28 01:03:00,111 INFO L445 BasicCegarLoop]: Path program histogram: [10, 6, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:03:00,114 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2024-06-28 01:03:00,114 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2024-06-28 01:03:00,117 INFO L507 ceAbstractionStarter]: Automizer considered 2 witness invariants [2024-06-28 01:03:00,117 INFO L508 ceAbstractionStarter]: WitnessConsidered=2 [2024-06-28 01:03:00,118 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.06 01:03:00 BasicIcfg [2024-06-28 01:03:00,118 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-06-28 01:03:00,118 INFO L158 Benchmark]: Toolchain (without parser) took 11499.64ms. Allocated memory was 144.7MB in the beginning and 436.2MB in the end (delta: 291.5MB). Free memory was 116.7MB in the beginning and 298.8MB in the end (delta: -182.1MB). Peak memory consumption was 109.9MB. Max. memory is 16.1GB. [2024-06-28 01:03:00,119 INFO L158 Benchmark]: Witness Parser took 0.16ms. Allocated memory is still 144.7MB. Free memory is still 102.7MB. There was no memory consumed. Max. memory is 16.1GB. [2024-06-28 01:03:00,119 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 144.7MB. Free memory was 117.4MB in the beginning and 117.2MB in the end (delta: 111.5kB). There was no memory consumed. Max. memory is 16.1GB. [2024-06-28 01:03:00,119 INFO L158 Benchmark]: CACSL2BoogieTranslator took 423.39ms. Allocated memory is still 144.7MB. Free memory was 116.3MB in the beginning and 90.1MB in the end (delta: 26.1MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. [2024-06-28 01:03:00,119 INFO L158 Benchmark]: Boogie Procedure Inliner took 45.50ms. Allocated memory is still 144.7MB. Free memory was 90.1MB in the beginning and 88.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-06-28 01:03:00,119 INFO L158 Benchmark]: Boogie Preprocessor took 58.23ms. Allocated memory is still 144.7MB. Free memory was 88.1MB in the beginning and 85.9MB in the end (delta: 2.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-06-28 01:03:00,120 INFO L158 Benchmark]: RCFGBuilder took 417.63ms. Allocated memory is still 144.7MB. Free memory was 85.9MB in the beginning and 65.9MB in the end (delta: 20.0MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. [2024-06-28 01:03:00,120 INFO L158 Benchmark]: TraceAbstraction took 10549.54ms. Allocated memory was 144.7MB in the beginning and 436.2MB in the end (delta: 291.5MB). Free memory was 65.5MB in the beginning and 298.8MB in the end (delta: -233.3MB). Peak memory consumption was 59.6MB. Max. memory is 16.1GB. [2024-06-28 01:03:00,123 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Witness Parser took 0.16ms. Allocated memory is still 144.7MB. Free memory is still 102.7MB. There was no memory consumed. Max. memory is 16.1GB. * CDTParser took 0.13ms. Allocated memory is still 144.7MB. Free memory was 117.4MB in the beginning and 117.2MB in the end (delta: 111.5kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 423.39ms. Allocated memory is still 144.7MB. Free memory was 116.3MB in the beginning and 90.1MB in the end (delta: 26.1MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 45.50ms. Allocated memory is still 144.7MB. Free memory was 90.1MB in the beginning and 88.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 58.23ms. Allocated memory is still 144.7MB. Free memory was 88.1MB in the beginning and 85.9MB in the end (delta: 2.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 417.63ms. Allocated memory is still 144.7MB. Free memory was 85.9MB in the beginning and 65.9MB in the end (delta: 20.0MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. * TraceAbstraction took 10549.54ms. Allocated memory was 144.7MB in the beginning and 436.2MB in the end (delta: 291.5MB). Free memory was 65.5MB in the beginning and 298.8MB in the end (delta: -233.3MB). Peak memory consumption was 59.6MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 767]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 768]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 18]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 54 locations, 5 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 10.5s, OverallIterations: 45, TraceHistogramMax: 1, PathProgramHistogramMax: 10, EmptinessCheckTime: 0.0s, AutomataDifference: 6.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 2042 SdHoareTripleChecker+Valid, 3.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1542 mSDsluCounter, 467 SdHoareTripleChecker+Invalid, 2.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 296 mSDsCounter, 211 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 6967 IncrementalHoareTripleChecker+Invalid, 7178 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 211 mSolverCounterUnsat, 171 mSDtfsCounter, 6967 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 240 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 233 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 1.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=550occurred in iteration=23, InterpolantAutomatonStates: 304, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 3.8s InterpolantComputationTime, 721 NumberOfCodeBlocks, 721 NumberOfCodeBlocksAsserted, 45 NumberOfCheckSat, 676 ConstructedInterpolants, 0 QuantifiedInterpolants, 5820 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 45 InterpolantComputations, 45 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 3 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2024-06-28 01:03:00,176 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE