./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe033_tso.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2024-05-07_14-17-48.files/protection/safe033_tso.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b44c8288 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe033_tso.i ./goblint.2024-05-07_14-17-48.files/protection/safe033_tso.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --- Real Ultimate output --- This is Ultimate 0.2.4-wip.fs.witness-ghost-b44c828-m [2024-05-12 12:47:59,398 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-05-12 12:47:59,473 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-05-12 12:47:59,480 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-05-12 12:47:59,480 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-05-12 12:47:59,511 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-05-12 12:47:59,512 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-05-12 12:47:59,512 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-05-12 12:47:59,513 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-05-12 12:47:59,516 INFO L153 SettingsManager]: * Use memory slicer=true [2024-05-12 12:47:59,516 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-05-12 12:47:59,517 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-05-12 12:47:59,518 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-05-12 12:47:59,519 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-05-12 12:47:59,519 INFO L153 SettingsManager]: * Use SBE=true [2024-05-12 12:47:59,519 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-05-12 12:47:59,519 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-05-12 12:47:59,519 INFO L153 SettingsManager]: * sizeof long=4 [2024-05-12 12:47:59,520 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-05-12 12:47:59,520 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-05-12 12:47:59,520 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-05-12 12:47:59,520 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-05-12 12:47:59,521 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-05-12 12:47:59,521 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-05-12 12:47:59,521 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-05-12 12:47:59,521 INFO L153 SettingsManager]: * sizeof long double=12 [2024-05-12 12:47:59,521 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-05-12 12:47:59,522 INFO L153 SettingsManager]: * Use constant arrays=true [2024-05-12 12:47:59,522 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-05-12 12:47:59,522 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-05-12 12:47:59,523 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-05-12 12:47:59,523 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-05-12 12:47:59,523 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-05-12 12:47:59,524 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-05-12 12:47:59,524 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-05-12 12:47:59,524 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-05-12 12:47:59,524 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-05-12 12:47:59,524 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-05-12 12:47:59,524 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-05-12 12:47:59,525 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-05-12 12:47:59,525 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-05-12 12:47:59,525 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-05-12 12:47:59,525 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-05-12 12:47:59,525 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-05-12 12:47:59,758 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-05-12 12:47:59,779 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-05-12 12:47:59,781 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-05-12 12:47:59,782 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-05-12 12:47:59,782 INFO L274 PluginConnector]: Witness Parser initialized [2024-05-12 12:47:59,783 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-07_14-17-48.files/protection/safe033_tso.yml/witness.yml [2024-05-12 12:47:59,892 INFO L270 PluginConnector]: Initializing CDTParser... [2024-05-12 12:47:59,893 INFO L274 PluginConnector]: CDTParser initialized [2024-05-12 12:47:59,893 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe033_tso.i [2024-05-12 12:48:01,005 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-05-12 12:48:01,239 INFO L384 CDTParser]: Found 1 translation units. [2024-05-12 12:48:01,239 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe033_tso.i [2024-05-12 12:48:01,258 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2334e8b44/a358a5a7950a4c94852e858f42a8750d/FLAG7f0527ac9 [2024-05-12 12:48:01,269 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2334e8b44/a358a5a7950a4c94852e858f42a8750d [2024-05-12 12:48:01,269 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-05-12 12:48:01,271 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-05-12 12:48:01,271 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-05-12 12:48:01,272 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-05-12 12:48:01,276 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-05-12 12:48:01,276 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 12.05 12:47:59" (1/2) ... [2024-05-12 12:48:01,277 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@34407f8b and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 12:48:01, skipping insertion in model container [2024-05-12 12:48:01,278 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 12.05 12:47:59" (1/2) ... [2024-05-12 12:48:01,279 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@55271952 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 12:48:01, skipping insertion in model container [2024-05-12 12:48:01,279 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.05 12:48:01" (2/2) ... [2024-05-12 12:48:01,279 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@34407f8b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 12:48:01, skipping insertion in model container [2024-05-12 12:48:01,280 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.05 12:48:01" (2/2) ... [2024-05-12 12:48:01,280 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-05-12 12:48:01,306 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-05-12 12:48:01,308 INFO L97 edCorrectnessWitness]: Location invariant before [L764-L764] (((! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2))) [2024-05-12 12:48:01,308 INFO L97 edCorrectnessWitness]: Location invariant before [L763-L763] (((! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2))) [2024-05-12 12:48:01,308 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-05-12 12:48:01,308 INFO L106 edCorrectnessWitness]: ghost_update [L761-L761] multithreaded = 1; [2024-05-12 12:48:01,351 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-05-12 12:48:01,504 WARN L246 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe033_tso.i[945,958] [2024-05-12 12:48:01,650 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-05-12 12:48:01,658 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local [2024-05-12 12:48:01,702 WARN L246 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe033_tso.i[945,958] Start Parsing Local Start Parsing Local Start Parsing Local [2024-05-12 12:48:01,769 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-05-12 12:48:01,834 INFO L206 MainTranslator]: Completed translation [2024-05-12 12:48:01,835 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 12:48:01 WrapperNode [2024-05-12 12:48:01,835 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-05-12 12:48:01,836 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-05-12 12:48:01,836 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-05-12 12:48:01,836 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-05-12 12:48:01,842 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 12:48:01" (1/1) ... [2024-05-12 12:48:01,870 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 12:48:01" (1/1) ... [2024-05-12 12:48:01,896 INFO L138 Inliner]: procedures = 175, calls = 42, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 62 [2024-05-12 12:48:01,897 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-05-12 12:48:01,898 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-05-12 12:48:01,898 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-05-12 12:48:01,898 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-05-12 12:48:01,906 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 12:48:01" (1/1) ... [2024-05-12 12:48:01,907 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 12:48:01" (1/1) ... [2024-05-12 12:48:01,912 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 12:48:01" (1/1) ... [2024-05-12 12:48:01,933 INFO L175 MemorySlicer]: Split 4 memory accesses to 3 slices as follows [2, 1, 1]. 50 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 2 writes are split as follows [0, 1, 1]. [2024-05-12 12:48:01,933 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 12:48:01" (1/1) ... [2024-05-12 12:48:01,934 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 12:48:01" (1/1) ... [2024-05-12 12:48:01,941 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 12:48:01" (1/1) ... [2024-05-12 12:48:01,943 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 12:48:01" (1/1) ... [2024-05-12 12:48:01,944 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 12:48:01" (1/1) ... [2024-05-12 12:48:01,945 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 12:48:01" (1/1) ... [2024-05-12 12:48:01,947 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-05-12 12:48:01,947 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-05-12 12:48:01,948 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-05-12 12:48:01,948 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-05-12 12:48:01,952 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 12:48:01" (1/1) ... [2024-05-12 12:48:01,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-05-12 12:48:01,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 12:48:01,982 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-05-12 12:48:01,984 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-05-12 12:48:02,014 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-05-12 12:48:02,015 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-05-12 12:48:02,015 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-05-12 12:48:02,015 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-05-12 12:48:02,015 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-05-12 12:48:02,016 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-05-12 12:48:02,016 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-05-12 12:48:02,016 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-05-12 12:48:02,016 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-05-12 12:48:02,016 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-05-12 12:48:02,017 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-05-12 12:48:02,017 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-05-12 12:48:02,017 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-05-12 12:48:02,018 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-05-12 12:48:02,018 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-05-12 12:48:02,018 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-05-12 12:48:02,018 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-05-12 12:48:02,020 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-05-12 12:48:02,118 INFO L244 CfgBuilder]: Building ICFG [2024-05-12 12:48:02,120 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-05-12 12:48:02,252 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-05-12 12:48:02,252 INFO L293 CfgBuilder]: Performing block encoding [2024-05-12 12:48:02,322 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-05-12 12:48:02,322 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-05-12 12:48:02,322 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.05 12:48:02 BoogieIcfgContainer [2024-05-12 12:48:02,323 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-05-12 12:48:02,324 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-05-12 12:48:02,324 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-05-12 12:48:02,327 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-05-12 12:48:02,327 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 12.05 12:47:59" (1/4) ... [2024-05-12 12:48:02,328 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@751b532c and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 12.05 12:48:02, skipping insertion in model container [2024-05-12 12:48:02,328 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.05 12:48:01" (2/4) ... [2024-05-12 12:48:02,328 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@751b532c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.05 12:48:02, skipping insertion in model container [2024-05-12 12:48:02,328 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 12:48:01" (3/4) ... [2024-05-12 12:48:02,329 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@751b532c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.05 12:48:02, skipping insertion in model container [2024-05-12 12:48:02,329 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.05 12:48:02" (4/4) ... [2024-05-12 12:48:02,330 INFO L112 eAbstractionObserver]: Analyzing ICFG safe033_tso.i [2024-05-12 12:48:02,351 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-05-12 12:48:02,353 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-05-12 12:48:02,353 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-05-12 12:48:02,381 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-05-12 12:48:02,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 42 places, 36 transitions, 80 flow [2024-05-12 12:48:02,446 INFO L124 PetriNetUnfolderBase]: 1/34 cut-off events. [2024-05-12 12:48:02,446 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-05-12 12:48:02,449 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 32. Up to 2 conditions per place. [2024-05-12 12:48:02,449 INFO L82 GeneralOperation]: Start removeDead. Operand has 42 places, 36 transitions, 80 flow [2024-05-12 12:48:02,452 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 38 places, 31 transitions, 68 flow [2024-05-12 12:48:02,467 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-05-12 12:48:02,476 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;@1626993e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-05-12 12:48:02,476 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2024-05-12 12:48:02,480 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-05-12 12:48:02,480 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-05-12 12:48:02,481 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-05-12 12:48:02,481 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:48:02,481 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-05-12 12:48:02,482 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 12:48:02,489 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:48:02,489 INFO L85 PathProgramCache]: Analyzing trace with hash 1391271451, now seen corresponding path program 1 times [2024-05-12 12:48:02,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:48:02,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272441825] [2024-05-12 12:48:02,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:48:02,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:48:02,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:48:02,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:48:02,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:48:02,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272441825] [2024-05-12 12:48:02,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272441825] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:48:02,974 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:48:02,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-05-12 12:48:02,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114949224] [2024-05-12 12:48:02,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:48:02,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-05-12 12:48:02,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:48:03,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-05-12 12:48:03,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-05-12 12:48:03,040 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 36 [2024-05-12 12:48:03,042 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 31 transitions, 68 flow. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:48:03,042 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:48:03,043 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 36 [2024-05-12 12:48:03,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:48:03,159 INFO L124 PetriNetUnfolderBase]: 145/303 cut-off events. [2024-05-12 12:48:03,159 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-05-12 12:48:03,161 INFO L83 FinitePrefix]: Finished finitePrefix Result has 579 conditions, 303 events. 145/303 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1426 event pairs, 59 based on Foata normal form. 1/285 useless extension candidates. Maximal degree in co-relation 565. Up to 253 conditions per place. [2024-05-12 12:48:03,164 INFO L140 encePairwiseOnDemand]: 31/36 looper letters, 24 selfloop transitions, 3 changer transitions 0/39 dead transitions. [2024-05-12 12:48:03,164 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 39 transitions, 141 flow [2024-05-12 12:48:03,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-05-12 12:48:03,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-05-12 12:48:03,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 74 transitions. [2024-05-12 12:48:03,175 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6851851851851852 [2024-05-12 12:48:03,177 INFO L175 Difference]: Start difference. First operand has 38 places, 31 transitions, 68 flow. Second operand 3 states and 74 transitions. [2024-05-12 12:48:03,178 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 39 transitions, 141 flow [2024-05-12 12:48:03,180 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 39 transitions, 138 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-05-12 12:48:03,182 INFO L231 Difference]: Finished difference. Result has 39 places, 33 transitions, 87 flow [2024-05-12 12:48:03,184 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} [2024-05-12 12:48:03,187 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 1 predicate places. [2024-05-12 12:48:03,187 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 33 transitions, 87 flow [2024-05-12 12:48:03,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:48:03,187 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:48:03,188 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:48:03,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-05-12 12:48:03,188 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 12:48:03,188 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:48:03,189 INFO L85 PathProgramCache]: Analyzing trace with hash 1277042682, now seen corresponding path program 1 times [2024-05-12 12:48:03,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:48:03,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732493943] [2024-05-12 12:48:03,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:48:03,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:48:03,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:48:03,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:48:03,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:48:03,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732493943] [2024-05-12 12:48:03,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732493943] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:48:03,317 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:48:03,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-05-12 12:48:03,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014891828] [2024-05-12 12:48:03,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:48:03,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-05-12 12:48:03,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:48:03,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-05-12 12:48:03,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-05-12 12:48:03,349 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 36 [2024-05-12 12:48:03,350 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 33 transitions, 87 flow. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:48:03,350 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:48:03,350 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 36 [2024-05-12 12:48:03,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:48:03,451 INFO L124 PetriNetUnfolderBase]: 142/298 cut-off events. [2024-05-12 12:48:03,452 INFO L125 PetriNetUnfolderBase]: For 50/50 co-relation queries the response was YES. [2024-05-12 12:48:03,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 646 conditions, 298 events. 142/298 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1399 event pairs, 46 based on Foata normal form. 2/292 useless extension candidates. Maximal degree in co-relation 631. Up to 235 conditions per place. [2024-05-12 12:48:03,457 INFO L140 encePairwiseOnDemand]: 30/36 looper letters, 30 selfloop transitions, 5 changer transitions 0/47 dead transitions. [2024-05-12 12:48:03,458 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 47 transitions, 191 flow [2024-05-12 12:48:03,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-05-12 12:48:03,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-05-12 12:48:03,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 97 transitions. [2024-05-12 12:48:03,463 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6736111111111112 [2024-05-12 12:48:03,463 INFO L175 Difference]: Start difference. First operand has 39 places, 33 transitions, 87 flow. Second operand 4 states and 97 transitions. [2024-05-12 12:48:03,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 47 transitions, 191 flow [2024-05-12 12:48:03,464 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 47 transitions, 188 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-05-12 12:48:03,466 INFO L231 Difference]: Finished difference. Result has 42 places, 35 transitions, 111 flow [2024-05-12 12:48:03,467 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} [2024-05-12 12:48:03,469 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 4 predicate places. [2024-05-12 12:48:03,470 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 35 transitions, 111 flow [2024-05-12 12:48:03,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:48:03,470 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:48:03,471 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:48:03,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-05-12 12:48:03,471 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)] === [2024-05-12 12:48:03,472 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:48:03,472 INFO L85 PathProgramCache]: Analyzing trace with hash -456136566, now seen corresponding path program 1 times [2024-05-12 12:48:03,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:48:03,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872292408] [2024-05-12 12:48:03,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:48:03,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:48:03,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:48:03,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:48:03,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:48:03,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872292408] [2024-05-12 12:48:03,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872292408] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:48:03,644 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:48:03,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-05-12 12:48:03,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919717336] [2024-05-12 12:48:03,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:48:03,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-05-12 12:48:03,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:48:03,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-05-12 12:48:03,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-05-12 12:48:03,665 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 36 [2024-05-12 12:48:03,665 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 35 transitions, 111 flow. Second operand has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:48:03,665 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:48:03,665 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 36 [2024-05-12 12:48:03,666 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:48:03,733 INFO L124 PetriNetUnfolderBase]: 181/365 cut-off events. [2024-05-12 12:48:03,733 INFO L125 PetriNetUnfolderBase]: For 169/169 co-relation queries the response was YES. [2024-05-12 12:48:03,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 871 conditions, 365 events. 181/365 cut-off events. For 169/169 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1770 event pairs, 70 based on Foata normal form. 1/365 useless extension candidates. Maximal degree in co-relation 854. Up to 306 conditions per place. [2024-05-12 12:48:03,736 INFO L140 encePairwiseOnDemand]: 31/36 looper letters, 30 selfloop transitions, 5 changer transitions 0/46 dead transitions. [2024-05-12 12:48:03,736 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 46 transitions, 207 flow [2024-05-12 12:48:03,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-05-12 12:48:03,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-05-12 12:48:03,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 90 transitions. [2024-05-12 12:48:03,745 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-05-12 12:48:03,745 INFO L175 Difference]: Start difference. First operand has 42 places, 35 transitions, 111 flow. Second operand 4 states and 90 transitions. [2024-05-12 12:48:03,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 46 transitions, 207 flow [2024-05-12 12:48:03,747 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 46 transitions, 198 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-05-12 12:48:03,749 INFO L231 Difference]: Finished difference. Result has 44 places, 37 transitions, 127 flow [2024-05-12 12:48:03,749 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} [2024-05-12 12:48:03,750 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 6 predicate places. [2024-05-12 12:48:03,750 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 37 transitions, 127 flow [2024-05-12 12:48:03,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:48:03,751 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:48:03,751 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:48:03,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-05-12 12:48:03,751 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)] === [2024-05-12 12:48:03,751 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:48:03,752 INFO L85 PathProgramCache]: Analyzing trace with hash -800962632, now seen corresponding path program 1 times [2024-05-12 12:48:03,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:48:03,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224130544] [2024-05-12 12:48:03,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:48:03,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:48:03,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:48:03,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:48:03,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:48:03,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224130544] [2024-05-12 12:48:03,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224130544] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:48:03,872 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:48:03,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 12:48:03,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350846002] [2024-05-12 12:48:03,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:48:03,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 12:48:03,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:48:03,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 12:48:03,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-05-12 12:48:03,910 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 36 [2024-05-12 12:48:03,910 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 37 transitions, 127 flow. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:48:03,910 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:48:03,910 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 36 [2024-05-12 12:48:03,910 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:48:03,998 INFO L124 PetriNetUnfolderBase]: 177/376 cut-off events. [2024-05-12 12:48:03,999 INFO L125 PetriNetUnfolderBase]: For 251/251 co-relation queries the response was YES. [2024-05-12 12:48:03,999 INFO L83 FinitePrefix]: Finished finitePrefix Result has 917 conditions, 376 events. 177/376 cut-off events. For 251/251 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1816 event pairs, 44 based on Foata normal form. 4/374 useless extension candidates. Maximal degree in co-relation 899. Up to 253 conditions per place. [2024-05-12 12:48:04,002 INFO L140 encePairwiseOnDemand]: 29/36 looper letters, 41 selfloop transitions, 8 changer transitions 0/60 dead transitions. [2024-05-12 12:48:04,002 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 60 transitions, 275 flow [2024-05-12 12:48:04,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 12:48:04,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 12:48:04,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 133 transitions. [2024-05-12 12:48:04,005 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6157407407407407 [2024-05-12 12:48:04,005 INFO L175 Difference]: Start difference. First operand has 44 places, 37 transitions, 127 flow. Second operand 6 states and 133 transitions. [2024-05-12 12:48:04,006 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 60 transitions, 275 flow [2024-05-12 12:48:04,007 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 60 transitions, 266 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-05-12 12:48:04,008 INFO L231 Difference]: Finished difference. Result has 48 places, 38 transitions, 143 flow [2024-05-12 12:48:04,008 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} [2024-05-12 12:48:04,009 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 10 predicate places. [2024-05-12 12:48:04,009 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 38 transitions, 143 flow [2024-05-12 12:48:04,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:48:04,010 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:48:04,010 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:48:04,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-05-12 12:48:04,010 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 12:48:04,011 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:48:04,011 INFO L85 PathProgramCache]: Analyzing trace with hash -1286611551, now seen corresponding path program 1 times [2024-05-12 12:48:04,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:48:04,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413162914] [2024-05-12 12:48:04,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:48:04,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:48:04,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:48:04,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:48:04,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:48:04,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413162914] [2024-05-12 12:48:04,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413162914] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:48:04,130 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:48:04,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-05-12 12:48:04,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874931450] [2024-05-12 12:48:04,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:48:04,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-05-12 12:48:04,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:48:04,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-05-12 12:48:04,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-05-12 12:48:04,149 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 36 [2024-05-12 12:48:04,150 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 38 transitions, 143 flow. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:48:04,150 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:48:04,150 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 36 [2024-05-12 12:48:04,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:48:04,211 INFO L124 PetriNetUnfolderBase]: 183/372 cut-off events. [2024-05-12 12:48:04,211 INFO L125 PetriNetUnfolderBase]: For 395/395 co-relation queries the response was YES. [2024-05-12 12:48:04,213 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1004 conditions, 372 events. 183/372 cut-off events. For 395/395 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1783 event pairs, 36 based on Foata normal form. 2/371 useless extension candidates. Maximal degree in co-relation 984. Up to 260 conditions per place. [2024-05-12 12:48:04,214 INFO L140 encePairwiseOnDemand]: 29/36 looper letters, 35 selfloop transitions, 11 changer transitions 0/57 dead transitions. [2024-05-12 12:48:04,215 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 57 transitions, 293 flow [2024-05-12 12:48:04,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 12:48:04,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 12:48:04,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 113 transitions. [2024-05-12 12:48:04,218 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6277777777777778 [2024-05-12 12:48:04,218 INFO L175 Difference]: Start difference. First operand has 48 places, 38 transitions, 143 flow. Second operand 5 states and 113 transitions. [2024-05-12 12:48:04,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 57 transitions, 293 flow [2024-05-12 12:48:04,224 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 57 transitions, 277 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-05-12 12:48:04,225 INFO L231 Difference]: Finished difference. Result has 51 places, 44 transitions, 193 flow [2024-05-12 12:48:04,225 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=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=193, PETRI_PLACES=51, PETRI_TRANSITIONS=44} [2024-05-12 12:48:04,227 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 13 predicate places. [2024-05-12 12:48:04,227 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 44 transitions, 193 flow [2024-05-12 12:48:04,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:48:04,227 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:48:04,228 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:48:04,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-05-12 12:48:04,228 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 12:48:04,228 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:48:04,229 INFO L85 PathProgramCache]: Analyzing trace with hash 1466959273, now seen corresponding path program 1 times [2024-05-12 12:48:04,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:48:04,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869728606] [2024-05-12 12:48:04,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:48:04,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:48:04,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:48:04,366 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:48:04,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:48:04,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869728606] [2024-05-12 12:48:04,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869728606] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:48:04,366 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:48:04,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-05-12 12:48:04,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226561062] [2024-05-12 12:48:04,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:48:04,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-05-12 12:48:04,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:48:04,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-05-12 12:48:04,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-05-12 12:48:04,390 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 36 [2024-05-12 12:48:04,390 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 44 transitions, 193 flow. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:48:04,391 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:48:04,391 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 36 [2024-05-12 12:48:04,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:48:04,462 INFO L124 PetriNetUnfolderBase]: 190/419 cut-off events. [2024-05-12 12:48:04,462 INFO L125 PetriNetUnfolderBase]: For 574/574 co-relation queries the response was YES. [2024-05-12 12:48:04,463 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1212 conditions, 419 events. 190/419 cut-off events. For 574/574 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 2036 event pairs, 52 based on Foata normal form. 1/416 useless extension candidates. Maximal degree in co-relation 1190. Up to 264 conditions per place. [2024-05-12 12:48:04,465 INFO L140 encePairwiseOnDemand]: 29/36 looper letters, 38 selfloop transitions, 13 changer transitions 0/62 dead transitions. [2024-05-12 12:48:04,466 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 62 transitions, 356 flow [2024-05-12 12:48:04,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 12:48:04,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 12:48:04,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 117 transitions. [2024-05-12 12:48:04,467 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.65 [2024-05-12 12:48:04,467 INFO L175 Difference]: Start difference. First operand has 51 places, 44 transitions, 193 flow. Second operand 5 states and 117 transitions. [2024-05-12 12:48:04,467 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 62 transitions, 356 flow [2024-05-12 12:48:04,470 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 62 transitions, 337 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-05-12 12:48:04,471 INFO L231 Difference]: Finished difference. Result has 54 places, 46 transitions, 220 flow [2024-05-12 12:48:04,472 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=220, PETRI_PLACES=54, PETRI_TRANSITIONS=46} [2024-05-12 12:48:04,474 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 16 predicate places. [2024-05-12 12:48:04,474 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 46 transitions, 220 flow [2024-05-12 12:48:04,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:48:04,475 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:48:04,475 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:48:04,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-05-12 12:48:04,475 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 12:48:04,475 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:48:04,476 INFO L85 PathProgramCache]: Analyzing trace with hash -227582087, now seen corresponding path program 2 times [2024-05-12 12:48:04,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:48:04,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190712308] [2024-05-12 12:48:04,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:48:04,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:48:04,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:48:04,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:48:04,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:48:04,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190712308] [2024-05-12 12:48:04,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190712308] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:48:04,584 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:48:04,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-05-12 12:48:04,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53664656] [2024-05-12 12:48:04,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:48:04,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-05-12 12:48:04,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:48:04,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-05-12 12:48:04,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-05-12 12:48:04,621 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 36 [2024-05-12 12:48:04,621 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 46 transitions, 220 flow. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:48:04,621 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:48:04,621 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 36 [2024-05-12 12:48:04,621 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:48:04,681 INFO L124 PetriNetUnfolderBase]: 185/394 cut-off events. [2024-05-12 12:48:04,682 INFO L125 PetriNetUnfolderBase]: For 670/670 co-relation queries the response was YES. [2024-05-12 12:48:04,683 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1195 conditions, 394 events. 185/394 cut-off events. For 670/670 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1926 event pairs, 43 based on Foata normal form. 2/391 useless extension candidates. Maximal degree in co-relation 1172. Up to 259 conditions per place. [2024-05-12 12:48:04,684 INFO L140 encePairwiseOnDemand]: 29/36 looper letters, 35 selfloop transitions, 12 changer transitions 0/58 dead transitions. [2024-05-12 12:48:04,684 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 58 transitions, 340 flow [2024-05-12 12:48:04,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 12:48:04,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 12:48:04,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 112 transitions. [2024-05-12 12:48:04,685 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6222222222222222 [2024-05-12 12:48:04,685 INFO L175 Difference]: Start difference. First operand has 54 places, 46 transitions, 220 flow. Second operand 5 states and 112 transitions. [2024-05-12 12:48:04,685 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 58 transitions, 340 flow [2024-05-12 12:48:04,687 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 58 transitions, 321 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-05-12 12:48:04,688 INFO L231 Difference]: Finished difference. Result has 57 places, 46 transitions, 232 flow [2024-05-12 12:48:04,688 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=201, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=232, PETRI_PLACES=57, PETRI_TRANSITIONS=46} [2024-05-12 12:48:04,688 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 19 predicate places. [2024-05-12 12:48:04,688 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 46 transitions, 232 flow [2024-05-12 12:48:04,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:48:04,689 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:48:04,689 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:48:04,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-05-12 12:48:04,689 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 12:48:04,689 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:48:04,689 INFO L85 PathProgramCache]: Analyzing trace with hash 512740262, now seen corresponding path program 1 times [2024-05-12 12:48:04,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:48:04,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685111379] [2024-05-12 12:48:04,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:48:04,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:48:04,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:48:04,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:48:04,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:48:04,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685111379] [2024-05-12 12:48:04,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685111379] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:48:04,796 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:48:04,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 12:48:04,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389498111] [2024-05-12 12:48:04,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:48:04,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 12:48:04,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:48:04,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 12:48:04,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-05-12 12:48:04,814 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 36 [2024-05-12 12:48:04,814 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 46 transitions, 232 flow. Second operand has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:48:04,814 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:48:04,814 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 36 [2024-05-12 12:48:04,814 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:48:04,896 INFO L124 PetriNetUnfolderBase]: 192/391 cut-off events. [2024-05-12 12:48:04,897 INFO L125 PetriNetUnfolderBase]: For 822/822 co-relation queries the response was YES. [2024-05-12 12:48:04,898 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1230 conditions, 391 events. 192/391 cut-off events. For 822/822 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1884 event pairs, 36 based on Foata normal form. 4/392 useless extension candidates. Maximal degree in co-relation 1206. Up to 244 conditions per place. [2024-05-12 12:48:04,900 INFO L140 encePairwiseOnDemand]: 29/36 looper letters, 37 selfloop transitions, 15 changer transitions 0/63 dead transitions. [2024-05-12 12:48:04,901 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 63 transitions, 374 flow [2024-05-12 12:48:04,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 12:48:04,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 12:48:04,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 131 transitions. [2024-05-12 12:48:04,902 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6064814814814815 [2024-05-12 12:48:04,902 INFO L175 Difference]: Start difference. First operand has 57 places, 46 transitions, 232 flow. Second operand 6 states and 131 transitions. [2024-05-12 12:48:04,902 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 63 transitions, 374 flow [2024-05-12 12:48:04,905 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 63 transitions, 338 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-05-12 12:48:04,907 INFO L231 Difference]: Finished difference. Result has 58 places, 47 transitions, 237 flow [2024-05-12 12:48:04,907 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=196, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=237, PETRI_PLACES=58, PETRI_TRANSITIONS=47} [2024-05-12 12:48:04,908 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 20 predicate places. [2024-05-12 12:48:04,909 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 47 transitions, 237 flow [2024-05-12 12:48:04,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:48:04,909 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:48:04,910 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:48:04,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-05-12 12:48:04,910 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 12:48:04,910 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:48:04,910 INFO L85 PathProgramCache]: Analyzing trace with hash 24143726, now seen corresponding path program 1 times [2024-05-12 12:48:04,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:48:04,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147994495] [2024-05-12 12:48:04,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:48:04,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:48:04,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:48:05,041 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:48:05,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:48:05,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147994495] [2024-05-12 12:48:05,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147994495] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:48:05,042 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:48:05,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 12:48:05,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635259127] [2024-05-12 12:48:05,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:48:05,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 12:48:05,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:48:05,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 12:48:05,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-05-12 12:48:05,081 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 36 [2024-05-12 12:48:05,081 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 47 transitions, 237 flow. Second operand has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:48:05,081 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:48:05,082 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 36 [2024-05-12 12:48:05,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:48:05,185 INFO L124 PetriNetUnfolderBase]: 199/411 cut-off events. [2024-05-12 12:48:05,185 INFO L125 PetriNetUnfolderBase]: For 855/855 co-relation queries the response was YES. [2024-05-12 12:48:05,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1315 conditions, 411 events. 199/411 cut-off events. For 855/855 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 2024 event pairs, 43 based on Foata normal form. 1/409 useless extension candidates. Maximal degree in co-relation 1290. Up to 309 conditions per place. [2024-05-12 12:48:05,188 INFO L140 encePairwiseOnDemand]: 29/36 looper letters, 50 selfloop transitions, 9 changer transitions 0/70 dead transitions. [2024-05-12 12:48:05,188 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 70 transitions, 413 flow [2024-05-12 12:48:05,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 12:48:05,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 12:48:05,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 133 transitions. [2024-05-12 12:48:05,189 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6157407407407407 [2024-05-12 12:48:05,190 INFO L175 Difference]: Start difference. First operand has 58 places, 47 transitions, 237 flow. Second operand 6 states and 133 transitions. [2024-05-12 12:48:05,190 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 70 transitions, 413 flow [2024-05-12 12:48:05,192 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 70 transitions, 378 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-05-12 12:48:05,193 INFO L231 Difference]: Finished difference. Result has 60 places, 49 transitions, 239 flow [2024-05-12 12:48:05,193 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=239, PETRI_PLACES=60, PETRI_TRANSITIONS=49} [2024-05-12 12:48:05,194 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 22 predicate places. [2024-05-12 12:48:05,194 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 49 transitions, 239 flow [2024-05-12 12:48:05,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:48:05,195 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:48:05,195 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:48:05,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-05-12 12:48:05,197 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 12:48:05,197 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:48:05,197 INFO L85 PathProgramCache]: Analyzing trace with hash 2022789668, now seen corresponding path program 2 times [2024-05-12 12:48:05,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:48:05,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629110749] [2024-05-12 12:48:05,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:48:05,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:48:05,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:48:05,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:48:05,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:48:05,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629110749] [2024-05-12 12:48:05,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629110749] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:48:05,285 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:48:05,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 12:48:05,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220007078] [2024-05-12 12:48:05,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:48:05,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 12:48:05,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:48:05,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 12:48:05,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-05-12 12:48:05,303 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 36 [2024-05-12 12:48:05,304 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 49 transitions, 239 flow. Second operand has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:48:05,304 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:48:05,304 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 36 [2024-05-12 12:48:05,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:48:05,376 INFO L124 PetriNetUnfolderBase]: 215/450 cut-off events. [2024-05-12 12:48:05,376 INFO L125 PetriNetUnfolderBase]: For 1023/1023 co-relation queries the response was YES. [2024-05-12 12:48:05,377 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1423 conditions, 450 events. 215/450 cut-off events. For 1023/1023 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 2297 event pairs, 39 based on Foata normal form. 1/446 useless extension candidates. Maximal degree in co-relation 1397. Up to 244 conditions per place. [2024-05-12 12:48:05,379 INFO L140 encePairwiseOnDemand]: 28/36 looper letters, 44 selfloop transitions, 21 changer transitions 0/76 dead transitions. [2024-05-12 12:48:05,379 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 76 transitions, 491 flow [2024-05-12 12:48:05,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 12:48:05,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 12:48:05,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 140 transitions. [2024-05-12 12:48:05,380 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6481481481481481 [2024-05-12 12:48:05,380 INFO L175 Difference]: Start difference. First operand has 60 places, 49 transitions, 239 flow. Second operand 6 states and 140 transitions. [2024-05-12 12:48:05,380 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 76 transitions, 491 flow [2024-05-12 12:48:05,382 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 76 transitions, 470 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-05-12 12:48:05,383 INFO L231 Difference]: Finished difference. Result has 62 places, 56 transitions, 313 flow [2024-05-12 12:48:05,383 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=218, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=313, PETRI_PLACES=62, PETRI_TRANSITIONS=56} [2024-05-12 12:48:05,383 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 24 predicate places. [2024-05-12 12:48:05,383 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 56 transitions, 313 flow [2024-05-12 12:48:05,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:48:05,384 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:48:05,384 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:48:05,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-05-12 12:48:05,384 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 12:48:05,384 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:48:05,384 INFO L85 PathProgramCache]: Analyzing trace with hash -438797040, now seen corresponding path program 3 times [2024-05-12 12:48:05,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:48:05,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178455985] [2024-05-12 12:48:05,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:48:05,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:48:05,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:48:05,478 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:48:05,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:48:05,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178455985] [2024-05-12 12:48:05,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178455985] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:48:05,479 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:48:05,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 12:48:05,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283331136] [2024-05-12 12:48:05,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:48:05,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 12:48:05,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:48:05,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 12:48:05,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-05-12 12:48:05,499 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 36 [2024-05-12 12:48:05,499 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 56 transitions, 313 flow. Second operand has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:48:05,499 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:48:05,499 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 36 [2024-05-12 12:48:05,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:48:05,568 INFO L124 PetriNetUnfolderBase]: 211/434 cut-off events. [2024-05-12 12:48:05,569 INFO L125 PetriNetUnfolderBase]: For 1285/1285 co-relation queries the response was YES. [2024-05-12 12:48:05,570 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1474 conditions, 434 events. 211/434 cut-off events. For 1285/1285 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 2192 event pairs, 39 based on Foata normal form. 2/431 useless extension candidates. Maximal degree in co-relation 1447. Up to 241 conditions per place. [2024-05-12 12:48:05,584 INFO L140 encePairwiseOnDemand]: 28/36 looper letters, 43 selfloop transitions, 18 changer transitions 0/72 dead transitions. [2024-05-12 12:48:05,584 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 72 transitions, 489 flow [2024-05-12 12:48:05,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 12:48:05,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 12:48:05,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 135 transitions. [2024-05-12 12:48:05,585 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-05-12 12:48:05,585 INFO L175 Difference]: Start difference. First operand has 62 places, 56 transitions, 313 flow. Second operand 6 states and 135 transitions. [2024-05-12 12:48:05,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 72 transitions, 489 flow [2024-05-12 12:48:05,588 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 72 transitions, 465 flow, removed 9 selfloop flow, removed 1 redundant places. [2024-05-12 12:48:05,589 INFO L231 Difference]: Finished difference. Result has 67 places, 56 transitions, 331 flow [2024-05-12 12:48:05,590 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=289, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=331, PETRI_PLACES=67, PETRI_TRANSITIONS=56} [2024-05-12 12:48:05,590 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 29 predicate places. [2024-05-12 12:48:05,590 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 56 transitions, 331 flow [2024-05-12 12:48:05,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:48:05,591 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:48:05,591 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:48:05,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-05-12 12:48:05,591 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 12:48:05,591 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:48:05,592 INFO L85 PathProgramCache]: Analyzing trace with hash -1133773021, now seen corresponding path program 1 times [2024-05-12 12:48:05,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:48:05,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214236831] [2024-05-12 12:48:05,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:48:05,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:48:05,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:48:05,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:48:05,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:48:05,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214236831] [2024-05-12 12:48:05,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214236831] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:48:05,677 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:48:05,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 12:48:05,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394903877] [2024-05-12 12:48:05,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:48:05,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 12:48:05,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:48:05,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 12:48:05,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-05-12 12:48:05,701 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 36 [2024-05-12 12:48:05,702 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 56 transitions, 331 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:48:05,702 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:48:05,702 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 36 [2024-05-12 12:48:05,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:48:05,775 INFO L124 PetriNetUnfolderBase]: 218/461 cut-off events. [2024-05-12 12:48:05,776 INFO L125 PetriNetUnfolderBase]: For 1581/1581 co-relation queries the response was YES. [2024-05-12 12:48:05,777 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1603 conditions, 461 events. 218/461 cut-off events. For 1581/1581 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2426 event pairs, 44 based on Foata normal form. 1/456 useless extension candidates. Maximal degree in co-relation 1573. Up to 286 conditions per place. [2024-05-12 12:48:05,779 INFO L140 encePairwiseOnDemand]: 28/36 looper letters, 41 selfloop transitions, 18 changer transitions 0/70 dead transitions. [2024-05-12 12:48:05,779 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 70 transitions, 493 flow [2024-05-12 12:48:05,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 12:48:05,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 12:48:05,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 115 transitions. [2024-05-12 12:48:05,783 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6388888888888888 [2024-05-12 12:48:05,783 INFO L175 Difference]: Start difference. First operand has 67 places, 56 transitions, 331 flow. Second operand 5 states and 115 transitions. [2024-05-12 12:48:05,783 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 70 transitions, 493 flow [2024-05-12 12:48:05,786 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 70 transitions, 445 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-05-12 12:48:05,788 INFO L231 Difference]: Finished difference. Result has 67 places, 58 transitions, 352 flow [2024-05-12 12:48:05,788 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=285, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=352, PETRI_PLACES=67, PETRI_TRANSITIONS=58} [2024-05-12 12:48:05,789 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 29 predicate places. [2024-05-12 12:48:05,789 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 58 transitions, 352 flow [2024-05-12 12:48:05,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:48:05,789 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:48:05,789 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:48:05,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-05-12 12:48:05,790 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 12:48:05,790 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:48:05,790 INFO L85 PathProgramCache]: Analyzing trace with hash 896065763, now seen corresponding path program 2 times [2024-05-12 12:48:05,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:48:05,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494623563] [2024-05-12 12:48:05,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:48:05,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:48:05,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:48:05,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:48:05,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:48:05,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494623563] [2024-05-12 12:48:05,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494623563] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:48:05,866 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:48:05,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 12:48:05,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936580216] [2024-05-12 12:48:05,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:48:05,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 12:48:05,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:48:05,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 12:48:05,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-05-12 12:48:05,882 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 36 [2024-05-12 12:48:05,883 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 58 transitions, 352 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:48:05,883 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:48:05,883 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 36 [2024-05-12 12:48:05,883 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:48:05,955 INFO L124 PetriNetUnfolderBase]: 225/476 cut-off events. [2024-05-12 12:48:05,955 INFO L125 PetriNetUnfolderBase]: For 1807/1807 co-relation queries the response was YES. [2024-05-12 12:48:05,956 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1659 conditions, 476 events. 225/476 cut-off events. For 1807/1807 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 2518 event pairs, 50 based on Foata normal form. 1/468 useless extension candidates. Maximal degree in co-relation 1629. Up to 257 conditions per place. [2024-05-12 12:48:05,959 INFO L140 encePairwiseOnDemand]: 29/36 looper letters, 43 selfloop transitions, 22 changer transitions 0/76 dead transitions. [2024-05-12 12:48:05,959 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 76 transitions, 560 flow [2024-05-12 12:48:05,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 12:48:05,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 12:48:05,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 134 transitions. [2024-05-12 12:48:05,960 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6203703703703703 [2024-05-12 12:48:05,960 INFO L175 Difference]: Start difference. First operand has 67 places, 58 transitions, 352 flow. Second operand 6 states and 134 transitions. [2024-05-12 12:48:05,960 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 76 transitions, 560 flow [2024-05-12 12:48:05,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 76 transitions, 519 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-05-12 12:48:05,965 INFO L231 Difference]: Finished difference. Result has 69 places, 60 transitions, 383 flow [2024-05-12 12:48:05,965 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=313, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=383, PETRI_PLACES=69, PETRI_TRANSITIONS=60} [2024-05-12 12:48:05,965 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 31 predicate places. [2024-05-12 12:48:05,966 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 60 transitions, 383 flow [2024-05-12 12:48:05,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:48:05,966 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:48:05,966 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:48:05,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-05-12 12:48:05,966 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 12:48:05,967 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:48:05,967 INFO L85 PathProgramCache]: Analyzing trace with hash 896273153, now seen corresponding path program 3 times [2024-05-12 12:48:05,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:48:05,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037675278] [2024-05-12 12:48:05,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:48:05,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:48:05,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:48:06,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:48:06,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:48:06,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037675278] [2024-05-12 12:48:06,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037675278] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:48:06,071 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:48:06,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 12:48:06,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699701432] [2024-05-12 12:48:06,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:48:06,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 12:48:06,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:48:06,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 12:48:06,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-05-12 12:48:06,094 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 36 [2024-05-12 12:48:06,094 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 60 transitions, 383 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:48:06,095 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:48:06,095 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 36 [2024-05-12 12:48:06,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:48:06,173 INFO L124 PetriNetUnfolderBase]: 223/477 cut-off events. [2024-05-12 12:48:06,173 INFO L125 PetriNetUnfolderBase]: For 1873/1873 co-relation queries the response was YES. [2024-05-12 12:48:06,175 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1658 conditions, 477 events. 223/477 cut-off events. For 1873/1873 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 2530 event pairs, 48 based on Foata normal form. 1/471 useless extension candidates. Maximal degree in co-relation 1628. Up to 255 conditions per place. [2024-05-12 12:48:06,177 INFO L140 encePairwiseOnDemand]: 28/36 looper letters, 39 selfloop transitions, 25 changer transitions 0/75 dead transitions. [2024-05-12 12:48:06,177 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 75 transitions, 543 flow [2024-05-12 12:48:06,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 12:48:06,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 12:48:06,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 134 transitions. [2024-05-12 12:48:06,179 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6203703703703703 [2024-05-12 12:48:06,179 INFO L175 Difference]: Start difference. First operand has 69 places, 60 transitions, 383 flow. Second operand 6 states and 134 transitions. [2024-05-12 12:48:06,179 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 75 transitions, 543 flow [2024-05-12 12:48:06,183 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 75 transitions, 493 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-05-12 12:48:06,184 INFO L231 Difference]: Finished difference. Result has 72 places, 60 transitions, 388 flow [2024-05-12 12:48:06,184 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=333, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=388, PETRI_PLACES=72, PETRI_TRANSITIONS=60} [2024-05-12 12:48:06,185 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 34 predicate places. [2024-05-12 12:48:06,185 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 60 transitions, 388 flow [2024-05-12 12:48:06,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:48:06,185 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:48:06,185 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:48:06,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-05-12 12:48:06,186 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 12:48:06,186 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:48:06,186 INFO L85 PathProgramCache]: Analyzing trace with hash -1482141985, now seen corresponding path program 1 times [2024-05-12 12:48:06,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:48:06,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141111167] [2024-05-12 12:48:06,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:48:06,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:48:06,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:48:06,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:48:06,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:48:06,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141111167] [2024-05-12 12:48:06,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141111167] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:48:06,271 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:48:06,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 12:48:06,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793308262] [2024-05-12 12:48:06,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:48:06,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 12:48:06,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:48:06,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 12:48:06,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-05-12 12:48:06,303 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 36 [2024-05-12 12:48:06,304 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 60 transitions, 388 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:48:06,304 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:48:06,304 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 36 [2024-05-12 12:48:06,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:48:06,378 INFO L124 PetriNetUnfolderBase]: 233/486 cut-off events. [2024-05-12 12:48:06,378 INFO L125 PetriNetUnfolderBase]: For 1969/1969 co-relation queries the response was YES. [2024-05-12 12:48:06,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1714 conditions, 486 events. 233/486 cut-off events. For 1969/1969 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2555 event pairs, 38 based on Foata normal form. 2/485 useless extension candidates. Maximal degree in co-relation 1683. Up to 325 conditions per place. [2024-05-12 12:48:06,382 INFO L140 encePairwiseOnDemand]: 29/36 looper letters, 53 selfloop transitions, 13 changer transitions 0/77 dead transitions. [2024-05-12 12:48:06,382 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 77 transitions, 560 flow [2024-05-12 12:48:06,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 12:48:06,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 12:48:06,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 131 transitions. [2024-05-12 12:48:06,383 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6064814814814815 [2024-05-12 12:48:06,383 INFO L175 Difference]: Start difference. First operand has 72 places, 60 transitions, 388 flow. Second operand 6 states and 131 transitions. [2024-05-12 12:48:06,383 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 77 transitions, 560 flow [2024-05-12 12:48:06,387 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 77 transitions, 471 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-05-12 12:48:06,388 INFO L231 Difference]: Finished difference. Result has 71 places, 61 transitions, 337 flow [2024-05-12 12:48:06,388 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=299, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=337, PETRI_PLACES=71, PETRI_TRANSITIONS=61} [2024-05-12 12:48:06,389 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 33 predicate places. [2024-05-12 12:48:06,389 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 61 transitions, 337 flow [2024-05-12 12:48:06,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:48:06,389 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:48:06,389 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:48:06,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-05-12 12:48:06,390 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 12:48:06,390 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:48:06,390 INFO L85 PathProgramCache]: Analyzing trace with hash -1472618785, now seen corresponding path program 2 times [2024-05-12 12:48:06,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:48:06,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711871861] [2024-05-12 12:48:06,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:48:06,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:48:06,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:48:06,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:48:06,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:48:06,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711871861] [2024-05-12 12:48:06,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711871861] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:48:06,473 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:48:06,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 12:48:06,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807919404] [2024-05-12 12:48:06,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:48:06,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 12:48:06,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:48:06,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 12:48:06,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-05-12 12:48:06,508 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 36 [2024-05-12 12:48:06,508 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 61 transitions, 337 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:48:06,509 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:48:06,509 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 36 [2024-05-12 12:48:06,509 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:48:06,602 INFO L124 PetriNetUnfolderBase]: 230/481 cut-off events. [2024-05-12 12:48:06,602 INFO L125 PetriNetUnfolderBase]: For 1646/1646 co-relation queries the response was YES. [2024-05-12 12:48:06,603 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1604 conditions, 481 events. 230/481 cut-off events. For 1646/1646 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2527 event pairs, 33 based on Foata normal form. 2/480 useless extension candidates. Maximal degree in co-relation 1573. Up to 274 conditions per place. [2024-05-12 12:48:06,605 INFO L140 encePairwiseOnDemand]: 30/36 looper letters, 54 selfloop transitions, 13 changer transitions 0/78 dead transitions. [2024-05-12 12:48:06,605 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 78 transitions, 507 flow [2024-05-12 12:48:06,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 12:48:06,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 12:48:06,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 129 transitions. [2024-05-12 12:48:06,606 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5972222222222222 [2024-05-12 12:48:06,607 INFO L175 Difference]: Start difference. First operand has 71 places, 61 transitions, 337 flow. Second operand 6 states and 129 transitions. [2024-05-12 12:48:06,607 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 78 transitions, 507 flow [2024-05-12 12:48:06,610 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 78 transitions, 479 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-05-12 12:48:06,611 INFO L231 Difference]: Finished difference. Result has 73 places, 61 transitions, 339 flow [2024-05-12 12:48:06,611 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=309, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=339, PETRI_PLACES=73, PETRI_TRANSITIONS=61} [2024-05-12 12:48:06,612 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 35 predicate places. [2024-05-12 12:48:06,612 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 61 transitions, 339 flow [2024-05-12 12:48:06,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:48:06,612 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:48:06,612 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:48:06,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-05-12 12:48:06,612 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 12:48:06,613 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:48:06,613 INFO L85 PathProgramCache]: Analyzing trace with hash -536485239, now seen corresponding path program 1 times [2024-05-12 12:48:06,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:48:06,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482634061] [2024-05-12 12:48:06,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:48:06,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:48:06,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:48:06,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:48:06,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:48:06,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482634061] [2024-05-12 12:48:06,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482634061] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:48:06,686 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:48:06,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-05-12 12:48:06,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089972513] [2024-05-12 12:48:06,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:48:06,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-05-12 12:48:06,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:48:06,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-05-12 12:48:06,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-05-12 12:48:06,696 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 36 [2024-05-12 12:48:06,697 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 61 transitions, 339 flow. Second operand has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:48:06,697 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:48:06,697 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 36 [2024-05-12 12:48:06,697 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:48:06,745 INFO L124 PetriNetUnfolderBase]: 120/344 cut-off events. [2024-05-12 12:48:06,745 INFO L125 PetriNetUnfolderBase]: For 628/634 co-relation queries the response was YES. [2024-05-12 12:48:06,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 933 conditions, 344 events. 120/344 cut-off events. For 628/634 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1753 event pairs, 9 based on Foata normal form. 18/326 useless extension candidates. Maximal degree in co-relation 901. Up to 121 conditions per place. [2024-05-12 12:48:06,747 INFO L140 encePairwiseOnDemand]: 31/36 looper letters, 22 selfloop transitions, 15 changer transitions 0/70 dead transitions. [2024-05-12 12:48:06,748 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 70 transitions, 443 flow [2024-05-12 12:48:06,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-05-12 12:48:06,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-05-12 12:48:06,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 104 transitions. [2024-05-12 12:48:06,749 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7222222222222222 [2024-05-12 12:48:06,749 INFO L175 Difference]: Start difference. First operand has 73 places, 61 transitions, 339 flow. Second operand 4 states and 104 transitions. [2024-05-12 12:48:06,749 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 70 transitions, 443 flow [2024-05-12 12:48:06,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 70 transitions, 413 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-05-12 12:48:06,752 INFO L231 Difference]: Finished difference. Result has 74 places, 62 transitions, 375 flow [2024-05-12 12:48:06,752 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=309, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=375, PETRI_PLACES=74, PETRI_TRANSITIONS=62} [2024-05-12 12:48:06,753 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 36 predicate places. [2024-05-12 12:48:06,753 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 62 transitions, 375 flow [2024-05-12 12:48:06,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:48:06,753 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:48:06,753 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:48:06,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-05-12 12:48:06,754 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 12:48:06,754 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:48:06,754 INFO L85 PathProgramCache]: Analyzing trace with hash 1724503791, now seen corresponding path program 1 times [2024-05-12 12:48:06,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:48:06,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387894609] [2024-05-12 12:48:06,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:48:06,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:48:06,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:48:06,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:48:06,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:48:06,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387894609] [2024-05-12 12:48:06,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387894609] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:48:06,860 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:48:06,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:48:06,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912002987] [2024-05-12 12:48:06,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:48:06,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 12:48:06,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:48:06,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 12:48:06,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-05-12 12:48:06,906 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 36 [2024-05-12 12:48:06,907 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 62 transitions, 375 flow. Second operand has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:48:06,907 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:48:06,907 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 36 [2024-05-12 12:48:06,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:48:06,998 INFO L124 PetriNetUnfolderBase]: 200/449 cut-off events. [2024-05-12 12:48:06,998 INFO L125 PetriNetUnfolderBase]: For 1970/1970 co-relation queries the response was YES. [2024-05-12 12:48:06,999 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1561 conditions, 449 events. 200/449 cut-off events. For 1970/1970 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 2258 event pairs, 68 based on Foata normal form. 2/419 useless extension candidates. Maximal degree in co-relation 1527. Up to 328 conditions per place. [2024-05-12 12:48:07,001 INFO L140 encePairwiseOnDemand]: 29/36 looper letters, 58 selfloop transitions, 10 changer transitions 0/80 dead transitions. [2024-05-12 12:48:07,001 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 80 transitions, 563 flow [2024-05-12 12:48:07,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 12:48:07,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 12:48:07,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 144 transitions. [2024-05-12 12:48:07,002 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-05-12 12:48:07,003 INFO L175 Difference]: Start difference. First operand has 74 places, 62 transitions, 375 flow. Second operand 7 states and 144 transitions. [2024-05-12 12:48:07,003 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 80 transitions, 563 flow [2024-05-12 12:48:07,007 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 80 transitions, 545 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-05-12 12:48:07,008 INFO L231 Difference]: Finished difference. Result has 79 places, 63 transitions, 391 flow [2024-05-12 12:48:07,008 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=357, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=391, PETRI_PLACES=79, PETRI_TRANSITIONS=63} [2024-05-12 12:48:07,008 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 41 predicate places. [2024-05-12 12:48:07,008 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 63 transitions, 391 flow [2024-05-12 12:48:07,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:48:07,009 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:48:07,009 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:48:07,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-05-12 12:48:07,009 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 12:48:07,010 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:48:07,010 INFO L85 PathProgramCache]: Analyzing trace with hash 34661713, now seen corresponding path program 2 times [2024-05-12 12:48:07,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:48:07,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702603532] [2024-05-12 12:48:07,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:48:07,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:48:07,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:48:07,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:48:07,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:48:07,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702603532] [2024-05-12 12:48:07,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702603532] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:48:07,110 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:48:07,110 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:48:07,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823602896] [2024-05-12 12:48:07,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:48:07,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 12:48:07,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:48:07,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 12:48:07,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-05-12 12:48:07,175 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 36 [2024-05-12 12:48:07,175 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 63 transitions, 391 flow. Second operand has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:48:07,175 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:48:07,175 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 36 [2024-05-12 12:48:07,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:48:07,285 INFO L124 PetriNetUnfolderBase]: 211/503 cut-off events. [2024-05-12 12:48:07,285 INFO L125 PetriNetUnfolderBase]: For 2177/2177 co-relation queries the response was YES. [2024-05-12 12:48:07,286 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1733 conditions, 503 events. 211/503 cut-off events. For 2177/2177 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 2581 event pairs, 37 based on Foata normal form. 2/473 useless extension candidates. Maximal degree in co-relation 1698. Up to 302 conditions per place. [2024-05-12 12:48:07,289 INFO L140 encePairwiseOnDemand]: 29/36 looper letters, 61 selfloop transitions, 12 changer transitions 0/85 dead transitions. [2024-05-12 12:48:07,289 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 85 transitions, 603 flow [2024-05-12 12:48:07,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 12:48:07,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 12:48:07,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 163 transitions. [2024-05-12 12:48:07,290 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5659722222222222 [2024-05-12 12:48:07,290 INFO L175 Difference]: Start difference. First operand has 79 places, 63 transitions, 391 flow. Second operand 8 states and 163 transitions. [2024-05-12 12:48:07,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 85 transitions, 603 flow [2024-05-12 12:48:07,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 85 transitions, 579 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-05-12 12:48:07,297 INFO L231 Difference]: Finished difference. Result has 82 places, 64 transitions, 407 flow [2024-05-12 12:48:07,297 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=367, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=407, PETRI_PLACES=82, PETRI_TRANSITIONS=64} [2024-05-12 12:48:07,298 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 44 predicate places. [2024-05-12 12:48:07,298 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 64 transitions, 407 flow [2024-05-12 12:48:07,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:48:07,298 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:48:07,299 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:48:07,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-05-12 12:48:07,299 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)] === [2024-05-12 12:48:07,299 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:48:07,299 INFO L85 PathProgramCache]: Analyzing trace with hash 205482253, now seen corresponding path program 3 times [2024-05-12 12:48:07,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:48:07,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760771269] [2024-05-12 12:48:07,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:48:07,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:48:07,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:48:07,411 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:48:07,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:48:07,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760771269] [2024-05-12 12:48:07,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760771269] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:48:07,412 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:48:07,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:48:07,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959816981] [2024-05-12 12:48:07,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:48:07,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 12:48:07,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:48:07,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 12:48:07,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-05-12 12:48:07,439 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 36 [2024-05-12 12:48:07,439 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 64 transitions, 407 flow. Second operand has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:48:07,439 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:48:07,440 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 36 [2024-05-12 12:48:07,440 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:48:07,520 INFO L124 PetriNetUnfolderBase]: 222/506 cut-off events. [2024-05-12 12:48:07,520 INFO L125 PetriNetUnfolderBase]: For 2535/2539 co-relation queries the response was YES. [2024-05-12 12:48:07,521 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1842 conditions, 506 events. 222/506 cut-off events. For 2535/2539 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 2667 event pairs, 76 based on Foata normal form. 3/476 useless extension candidates. Maximal degree in co-relation 1806. Up to 330 conditions per place. [2024-05-12 12:48:07,523 INFO L140 encePairwiseOnDemand]: 28/36 looper letters, 41 selfloop transitions, 26 changer transitions 0/79 dead transitions. [2024-05-12 12:48:07,524 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 79 transitions, 589 flow [2024-05-12 12:48:07,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 12:48:07,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 12:48:07,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 149 transitions. [2024-05-12 12:48:07,525 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5912698412698413 [2024-05-12 12:48:07,525 INFO L175 Difference]: Start difference. First operand has 82 places, 64 transitions, 407 flow. Second operand 7 states and 149 transitions. [2024-05-12 12:48:07,525 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 79 transitions, 589 flow [2024-05-12 12:48:07,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 79 transitions, 559 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-05-12 12:48:07,533 INFO L231 Difference]: Finished difference. Result has 83 places, 65 transitions, 447 flow [2024-05-12 12:48:07,534 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=377, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=447, PETRI_PLACES=83, PETRI_TRANSITIONS=65} [2024-05-12 12:48:07,534 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 45 predicate places. [2024-05-12 12:48:07,534 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 65 transitions, 447 flow [2024-05-12 12:48:07,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:48:07,534 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:48:07,535 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:48:07,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-05-12 12:48:07,535 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 12:48:07,535 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:48:07,535 INFO L85 PathProgramCache]: Analyzing trace with hash 1855781123, now seen corresponding path program 4 times [2024-05-12 12:48:07,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:48:07,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283435037] [2024-05-12 12:48:07,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:48:07,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:48:07,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:48:07,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:48:07,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:48:07,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283435037] [2024-05-12 12:48:07,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283435037] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:48:07,634 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:48:07,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:48:07,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029684189] [2024-05-12 12:48:07,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:48:07,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 12:48:07,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:48:07,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 12:48:07,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-05-12 12:48:07,673 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 36 [2024-05-12 12:48:07,674 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 65 transitions, 447 flow. Second operand has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:48:07,674 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:48:07,674 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 36 [2024-05-12 12:48:07,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:48:07,796 INFO L124 PetriNetUnfolderBase]: 253/578 cut-off events. [2024-05-12 12:48:07,796 INFO L125 PetriNetUnfolderBase]: For 4033/4035 co-relation queries the response was YES. [2024-05-12 12:48:07,797 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2020 conditions, 578 events. 253/578 cut-off events. For 4033/4035 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 3292 event pairs, 99 based on Foata normal form. 12/547 useless extension candidates. Maximal degree in co-relation 1983. Up to 319 conditions per place. [2024-05-12 12:48:07,799 INFO L140 encePairwiseOnDemand]: 28/36 looper letters, 44 selfloop transitions, 23 changer transitions 0/79 dead transitions. [2024-05-12 12:48:07,799 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 79 transitions, 623 flow [2024-05-12 12:48:07,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 12:48:07,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 12:48:07,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 148 transitions. [2024-05-12 12:48:07,801 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5873015873015873 [2024-05-12 12:48:07,801 INFO L175 Difference]: Start difference. First operand has 83 places, 65 transitions, 447 flow. Second operand 7 states and 148 transitions. [2024-05-12 12:48:07,802 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 79 transitions, 623 flow [2024-05-12 12:48:07,806 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 79 transitions, 563 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-05-12 12:48:07,807 INFO L231 Difference]: Finished difference. Result has 85 places, 65 transitions, 438 flow [2024-05-12 12:48:07,807 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=387, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=438, PETRI_PLACES=85, PETRI_TRANSITIONS=65} [2024-05-12 12:48:07,808 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 47 predicate places. [2024-05-12 12:48:07,808 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 65 transitions, 438 flow [2024-05-12 12:48:07,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:48:07,808 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:48:07,808 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:48:07,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-05-12 12:48:07,809 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 12:48:07,809 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:48:07,809 INFO L85 PathProgramCache]: Analyzing trace with hash 1277122468, now seen corresponding path program 1 times [2024-05-12 12:48:07,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:48:07,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487337125] [2024-05-12 12:48:07,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:48:07,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:48:07,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:48:07,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:48:07,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:48:07,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487337125] [2024-05-12 12:48:07,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487337125] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:48:07,900 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:48:07,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:48:07,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759289463] [2024-05-12 12:48:07,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:48:07,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 12:48:07,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:48:07,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 12:48:07,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-05-12 12:48:07,931 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 36 [2024-05-12 12:48:07,931 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 65 transitions, 438 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:48:07,932 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:48:07,932 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 36 [2024-05-12 12:48:07,932 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:48:08,055 INFO L124 PetriNetUnfolderBase]: 320/748 cut-off events. [2024-05-12 12:48:08,055 INFO L125 PetriNetUnfolderBase]: For 5042/5044 co-relation queries the response was YES. [2024-05-12 12:48:08,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2539 conditions, 748 events. 320/748 cut-off events. For 5042/5044 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 4724 event pairs, 97 based on Foata normal form. 8/710 useless extension candidates. Maximal degree in co-relation 2501. Up to 280 conditions per place. [2024-05-12 12:48:08,060 INFO L140 encePairwiseOnDemand]: 29/36 looper letters, 58 selfloop transitions, 18 changer transitions 0/88 dead transitions. [2024-05-12 12:48:08,060 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 88 transitions, 698 flow [2024-05-12 12:48:08,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 12:48:08,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 12:48:08,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 152 transitions. [2024-05-12 12:48:08,062 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6031746031746031 [2024-05-12 12:48:08,062 INFO L175 Difference]: Start difference. First operand has 85 places, 65 transitions, 438 flow. Second operand 7 states and 152 transitions. [2024-05-12 12:48:08,062 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 88 transitions, 698 flow [2024-05-12 12:48:08,068 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 88 transitions, 647 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-05-12 12:48:08,070 INFO L231 Difference]: Finished difference. Result has 87 places, 65 transitions, 426 flow [2024-05-12 12:48:08,070 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=387, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=426, PETRI_PLACES=87, PETRI_TRANSITIONS=65} [2024-05-12 12:48:08,070 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 49 predicate places. [2024-05-12 12:48:08,071 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 65 transitions, 426 flow [2024-05-12 12:48:08,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:48:08,071 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:48:08,071 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:48:08,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-05-12 12:48:08,071 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 12:48:08,072 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:48:08,072 INFO L85 PathProgramCache]: Analyzing trace with hash 1365688228, now seen corresponding path program 2 times [2024-05-12 12:48:08,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:48:08,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99367333] [2024-05-12 12:48:08,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:48:08,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:48:08,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:48:08,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:48:08,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:48:08,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99367333] [2024-05-12 12:48:08,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99367333] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:48:08,176 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:48:08,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:48:08,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005389914] [2024-05-12 12:48:08,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:48:08,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 12:48:08,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:48:08,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 12:48:08,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-05-12 12:48:08,203 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 36 [2024-05-12 12:48:08,203 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 65 transitions, 426 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:48:08,204 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:48:08,204 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 36 [2024-05-12 12:48:08,204 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:48:08,355 INFO L124 PetriNetUnfolderBase]: 343/806 cut-off events. [2024-05-12 12:48:08,355 INFO L125 PetriNetUnfolderBase]: For 5327/5329 co-relation queries the response was YES. [2024-05-12 12:48:08,357 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2671 conditions, 806 events. 343/806 cut-off events. For 5327/5329 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 5257 event pairs, 126 based on Foata normal form. 8/765 useless extension candidates. Maximal degree in co-relation 2632. Up to 390 conditions per place. [2024-05-12 12:48:08,361 INFO L140 encePairwiseOnDemand]: 29/36 looper letters, 55 selfloop transitions, 17 changer transitions 0/84 dead transitions. [2024-05-12 12:48:08,361 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 84 transitions, 668 flow [2024-05-12 12:48:08,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 12:48:08,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 12:48:08,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 133 transitions. [2024-05-12 12:48:08,363 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6157407407407407 [2024-05-12 12:48:08,363 INFO L175 Difference]: Start difference. First operand has 87 places, 65 transitions, 426 flow. Second operand 6 states and 133 transitions. [2024-05-12 12:48:08,364 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 84 transitions, 668 flow [2024-05-12 12:48:08,372 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 84 transitions, 633 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-05-12 12:48:08,375 INFO L231 Difference]: Finished difference. Result has 88 places, 65 transitions, 428 flow [2024-05-12 12:48:08,375 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=391, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=428, PETRI_PLACES=88, PETRI_TRANSITIONS=65} [2024-05-12 12:48:08,376 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 50 predicate places. [2024-05-12 12:48:08,376 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 65 transitions, 428 flow [2024-05-12 12:48:08,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:48:08,377 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:48:08,377 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:48:08,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-05-12 12:48:08,378 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 12:48:08,378 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:48:08,378 INFO L85 PathProgramCache]: Analyzing trace with hash 1365836098, now seen corresponding path program 3 times [2024-05-12 12:48:08,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:48:08,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852062464] [2024-05-12 12:48:08,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:48:08,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:48:08,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:48:08,493 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:48:08,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:48:08,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852062464] [2024-05-12 12:48:08,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852062464] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:48:08,494 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:48:08,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:48:08,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965195752] [2024-05-12 12:48:08,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:48:08,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 12:48:08,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:48:08,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 12:48:08,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-05-12 12:48:08,521 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 36 [2024-05-12 12:48:08,521 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 65 transitions, 428 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:48:08,521 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:48:08,521 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 36 [2024-05-12 12:48:08,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:48:08,624 INFO L124 PetriNetUnfolderBase]: 333/793 cut-off events. [2024-05-12 12:48:08,624 INFO L125 PetriNetUnfolderBase]: For 4447/4449 co-relation queries the response was YES. [2024-05-12 12:48:08,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2481 conditions, 793 events. 333/793 cut-off events. For 4447/4449 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 5146 event pairs, 136 based on Foata normal form. 10/754 useless extension candidates. Maximal degree in co-relation 2441. Up to 502 conditions per place. [2024-05-12 12:48:08,629 INFO L140 encePairwiseOnDemand]: 28/36 looper letters, 46 selfloop transitions, 20 changer transitions 0/78 dead transitions. [2024-05-12 12:48:08,630 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 78 transitions, 600 flow [2024-05-12 12:48:08,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 12:48:08,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 12:48:08,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 131 transitions. [2024-05-12 12:48:08,631 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6064814814814815 [2024-05-12 12:48:08,631 INFO L175 Difference]: Start difference. First operand has 88 places, 65 transitions, 428 flow. Second operand 6 states and 131 transitions. [2024-05-12 12:48:08,631 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 78 transitions, 600 flow [2024-05-12 12:48:08,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 78 transitions, 567 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-05-12 12:48:08,639 INFO L231 Difference]: Finished difference. Result has 90 places, 65 transitions, 442 flow [2024-05-12 12:48:08,639 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=395, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=442, PETRI_PLACES=90, PETRI_TRANSITIONS=65} [2024-05-12 12:48:08,640 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 52 predicate places. [2024-05-12 12:48:08,640 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 65 transitions, 442 flow [2024-05-12 12:48:08,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:48:08,640 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:48:08,640 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:48:08,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-05-12 12:48:08,640 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 12:48:08,641 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:48:08,641 INFO L85 PathProgramCache]: Analyzing trace with hash -1969910368, now seen corresponding path program 4 times [2024-05-12 12:48:08,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:48:08,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797053228] [2024-05-12 12:48:08,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:48:08,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:48:08,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:48:08,741 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:48:08,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:48:08,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797053228] [2024-05-12 12:48:08,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797053228] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:48:08,742 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:48:08,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:48:08,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613524106] [2024-05-12 12:48:08,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:48:08,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 12:48:08,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:48:08,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 12:48:08,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-05-12 12:48:08,776 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 36 [2024-05-12 12:48:08,777 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 65 transitions, 442 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:48:08,777 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:48:08,777 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 36 [2024-05-12 12:48:08,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:48:08,887 INFO L124 PetriNetUnfolderBase]: 367/872 cut-off events. [2024-05-12 12:48:08,887 INFO L125 PetriNetUnfolderBase]: For 4785/4787 co-relation queries the response was YES. [2024-05-12 12:48:08,890 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2721 conditions, 872 events. 367/872 cut-off events. For 4785/4787 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 5879 event pairs, 197 based on Foata normal form. 10/823 useless extension candidates. Maximal degree in co-relation 2680. Up to 587 conditions per place. [2024-05-12 12:48:08,893 INFO L140 encePairwiseOnDemand]: 28/36 looper letters, 42 selfloop transitions, 25 changer transitions 0/79 dead transitions. [2024-05-12 12:48:08,894 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 79 transitions, 618 flow [2024-05-12 12:48:08,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 12:48:08,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 12:48:08,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 147 transitions. [2024-05-12 12:48:08,895 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-05-12 12:48:08,895 INFO L175 Difference]: Start difference. First operand has 90 places, 65 transitions, 442 flow. Second operand 7 states and 147 transitions. [2024-05-12 12:48:08,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 79 transitions, 618 flow [2024-05-12 12:48:08,903 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 79 transitions, 573 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-05-12 12:48:08,904 INFO L231 Difference]: Finished difference. Result has 91 places, 65 transitions, 451 flow [2024-05-12 12:48:08,905 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=397, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=451, PETRI_PLACES=91, PETRI_TRANSITIONS=65} [2024-05-12 12:48:08,905 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 53 predicate places. [2024-05-12 12:48:08,905 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 65 transitions, 451 flow [2024-05-12 12:48:08,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:48:08,906 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:48:08,906 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:48:08,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-05-12 12:48:08,906 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 12:48:08,906 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:48:08,907 INFO L85 PathProgramCache]: Analyzing trace with hash -895256982, now seen corresponding path program 5 times [2024-05-12 12:48:08,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:48:08,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640856334] [2024-05-12 12:48:08,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:48:08,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:48:08,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:48:09,005 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:48:09,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:48:09,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640856334] [2024-05-12 12:48:09,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640856334] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:48:09,006 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:48:09,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:48:09,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432933798] [2024-05-12 12:48:09,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:48:09,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 12:48:09,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:48:09,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 12:48:09,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-05-12 12:48:09,041 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 36 [2024-05-12 12:48:09,042 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 65 transitions, 451 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:48:09,042 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:48:09,042 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 36 [2024-05-12 12:48:09,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:48:09,159 INFO L124 PetriNetUnfolderBase]: 401/961 cut-off events. [2024-05-12 12:48:09,159 INFO L125 PetriNetUnfolderBase]: For 5019/5021 co-relation queries the response was YES. [2024-05-12 12:48:09,163 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2923 conditions, 961 events. 401/961 cut-off events. For 5019/5021 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 6718 event pairs, 226 based on Foata normal form. 10/906 useless extension candidates. Maximal degree in co-relation 2882. Up to 661 conditions per place. [2024-05-12 12:48:09,169 INFO L140 encePairwiseOnDemand]: 29/36 looper letters, 45 selfloop transitions, 22 changer transitions 0/79 dead transitions. [2024-05-12 12:48:09,169 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 79 transitions, 627 flow [2024-05-12 12:48:09,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 12:48:09,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 12:48:09,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 146 transitions. [2024-05-12 12:48:09,170 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5793650793650794 [2024-05-12 12:48:09,171 INFO L175 Difference]: Start difference. First operand has 91 places, 65 transitions, 451 flow. Second operand 7 states and 146 transitions. [2024-05-12 12:48:09,171 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 79 transitions, 627 flow [2024-05-12 12:48:09,180 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 79 transitions, 579 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-05-12 12:48:09,182 INFO L231 Difference]: Finished difference. Result has 93 places, 65 transitions, 451 flow [2024-05-12 12:48:09,182 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=403, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=451, PETRI_PLACES=93, PETRI_TRANSITIONS=65} [2024-05-12 12:48:09,182 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 55 predicate places. [2024-05-12 12:48:09,183 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 65 transitions, 451 flow [2024-05-12 12:48:09,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:48:09,183 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:48:09,183 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:48:09,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-05-12 12:48:09,183 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 12:48:09,184 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:48:09,184 INFO L85 PathProgramCache]: Analyzing trace with hash -895404852, now seen corresponding path program 6 times [2024-05-12 12:48:09,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:48:09,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494418603] [2024-05-12 12:48:09,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:48:09,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:48:09,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:48:09,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:48:09,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:48:09,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494418603] [2024-05-12 12:48:09,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494418603] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:48:09,266 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:48:09,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:48:09,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279318346] [2024-05-12 12:48:09,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:48:09,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 12:48:09,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:48:09,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 12:48:09,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-05-12 12:48:09,310 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 36 [2024-05-12 12:48:09,310 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 65 transitions, 451 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:48:09,311 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:48:09,311 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 36 [2024-05-12 12:48:09,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:48:09,424 INFO L124 PetriNetUnfolderBase]: 410/988 cut-off events. [2024-05-12 12:48:09,424 INFO L125 PetriNetUnfolderBase]: For 4274/4276 co-relation queries the response was YES. [2024-05-12 12:48:09,427 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2948 conditions, 988 events. 410/988 cut-off events. For 4274/4276 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 7008 event pairs, 216 based on Foata normal form. 8/933 useless extension candidates. Maximal degree in co-relation 2906. Up to 427 conditions per place. [2024-05-12 12:48:09,435 INFO L140 encePairwiseOnDemand]: 29/36 looper letters, 50 selfloop transitions, 22 changer transitions 0/84 dead transitions. [2024-05-12 12:48:09,435 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 84 transitions, 653 flow [2024-05-12 12:48:09,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 12:48:09,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 12:48:09,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 150 transitions. [2024-05-12 12:48:09,436 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5952380952380952 [2024-05-12 12:48:09,436 INFO L175 Difference]: Start difference. First operand has 93 places, 65 transitions, 451 flow. Second operand 7 states and 150 transitions. [2024-05-12 12:48:09,436 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 84 transitions, 653 flow [2024-05-12 12:48:09,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 84 transitions, 611 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-05-12 12:48:09,446 INFO L231 Difference]: Finished difference. Result has 95 places, 65 transitions, 457 flow [2024-05-12 12:48:09,447 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=409, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=457, PETRI_PLACES=95, PETRI_TRANSITIONS=65} [2024-05-12 12:48:09,447 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 57 predicate places. [2024-05-12 12:48:09,447 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 65 transitions, 457 flow [2024-05-12 12:48:09,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:48:09,448 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:48:09,448 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:48:09,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-05-12 12:48:09,448 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 12:48:09,448 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:48:09,448 INFO L85 PathProgramCache]: Analyzing trace with hash -1962285856, now seen corresponding path program 1 times [2024-05-12 12:48:09,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:48:09,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278551201] [2024-05-12 12:48:09,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:48:09,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:48:09,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:48:09,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:48:09,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:48:09,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278551201] [2024-05-12 12:48:09,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278551201] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:48:09,540 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:48:09,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:48:09,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150773389] [2024-05-12 12:48:09,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:48:09,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 12:48:09,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:48:09,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 12:48:09,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-05-12 12:48:09,571 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 36 [2024-05-12 12:48:09,571 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 65 transitions, 457 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:48:09,571 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:48:09,571 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 36 [2024-05-12 12:48:09,571 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:48:09,696 INFO L124 PetriNetUnfolderBase]: 433/1055 cut-off events. [2024-05-12 12:48:09,697 INFO L125 PetriNetUnfolderBase]: For 4723/4725 co-relation queries the response was YES. [2024-05-12 12:48:09,700 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3139 conditions, 1055 events. 433/1055 cut-off events. For 4723/4725 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 7708 event pairs, 234 based on Foata normal form. 8/1000 useless extension candidates. Maximal degree in co-relation 3096. Up to 490 conditions per place. [2024-05-12 12:48:09,703 INFO L140 encePairwiseOnDemand]: 28/36 looper letters, 46 selfloop transitions, 26 changer transitions 0/84 dead transitions. [2024-05-12 12:48:09,703 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 84 transitions, 663 flow [2024-05-12 12:48:09,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 12:48:09,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 12:48:09,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 151 transitions. [2024-05-12 12:48:09,704 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5992063492063492 [2024-05-12 12:48:09,704 INFO L175 Difference]: Start difference. First operand has 95 places, 65 transitions, 457 flow. Second operand 7 states and 151 transitions. [2024-05-12 12:48:09,704 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 84 transitions, 663 flow [2024-05-12 12:48:09,714 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 84 transitions, 621 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-05-12 12:48:09,715 INFO L231 Difference]: Finished difference. Result has 97 places, 65 transitions, 470 flow [2024-05-12 12:48:09,716 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=415, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=470, PETRI_PLACES=97, PETRI_TRANSITIONS=65} [2024-05-12 12:48:09,716 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 59 predicate places. [2024-05-12 12:48:09,716 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 65 transitions, 470 flow [2024-05-12 12:48:09,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:48:09,716 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:48:09,717 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:48:09,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-05-12 12:48:09,717 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 12:48:09,717 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:48:09,717 INFO L85 PathProgramCache]: Analyzing trace with hash 1583299488, now seen corresponding path program 2 times [2024-05-12 12:48:09,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:48:09,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305815263] [2024-05-12 12:48:09,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:48:09,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:48:09,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:48:09,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:48:09,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:48:09,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305815263] [2024-05-12 12:48:09,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305815263] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:48:09,794 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:48:09,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:48:09,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035824284] [2024-05-12 12:48:09,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:48:09,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 12:48:09,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:48:09,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 12:48:09,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-05-12 12:48:09,821 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 36 [2024-05-12 12:48:09,821 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 65 transitions, 470 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:48:09,821 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:48:09,822 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 36 [2024-05-12 12:48:09,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:48:09,957 INFO L124 PetriNetUnfolderBase]: 456/1121 cut-off events. [2024-05-12 12:48:09,957 INFO L125 PetriNetUnfolderBase]: For 5082/5084 co-relation queries the response was YES. [2024-05-12 12:48:09,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3333 conditions, 1121 events. 456/1121 cut-off events. For 5082/5084 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 8324 event pairs, 278 based on Foata normal form. 8/1062 useless extension candidates. Maximal degree in co-relation 3289. Up to 703 conditions per place. [2024-05-12 12:48:09,964 INFO L140 encePairwiseOnDemand]: 28/36 looper letters, 49 selfloop transitions, 23 changer transitions 0/84 dead transitions. [2024-05-12 12:48:09,964 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 84 transitions, 676 flow [2024-05-12 12:48:09,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 12:48:09,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 12:48:09,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 152 transitions. [2024-05-12 12:48:09,965 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6031746031746031 [2024-05-12 12:48:09,965 INFO L175 Difference]: Start difference. First operand has 97 places, 65 transitions, 470 flow. Second operand 7 states and 152 transitions. [2024-05-12 12:48:09,965 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 84 transitions, 676 flow [2024-05-12 12:48:09,976 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 84 transitions, 625 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-05-12 12:48:09,978 INFO L231 Difference]: Finished difference. Result has 99 places, 65 transitions, 468 flow [2024-05-12 12:48:09,978 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=419, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=468, PETRI_PLACES=99, PETRI_TRANSITIONS=65} [2024-05-12 12:48:09,979 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 61 predicate places. [2024-05-12 12:48:09,979 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 65 transitions, 468 flow [2024-05-12 12:48:09,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:48:09,979 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:48:09,979 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:48:09,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-05-12 12:48:09,979 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 12:48:09,980 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:48:09,980 INFO L85 PathProgramCache]: Analyzing trace with hash -2142397890, now seen corresponding path program 3 times [2024-05-12 12:48:09,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:48:09,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313968600] [2024-05-12 12:48:09,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:48:09,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:48:09,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:48:10,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:48:10,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:48:10,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313968600] [2024-05-12 12:48:10,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313968600] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:48:10,064 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:48:10,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:48:10,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255051581] [2024-05-12 12:48:10,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:48:10,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 12:48:10,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:48:10,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 12:48:10,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-05-12 12:48:10,094 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 36 [2024-05-12 12:48:10,095 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 65 transitions, 468 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:48:10,095 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:48:10,095 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 36 [2024-05-12 12:48:10,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:48:10,212 INFO L124 PetriNetUnfolderBase]: 449/1106 cut-off events. [2024-05-12 12:48:10,213 INFO L125 PetriNetUnfolderBase]: For 3399/3401 co-relation queries the response was YES. [2024-05-12 12:48:10,216 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3154 conditions, 1106 events. 449/1106 cut-off events. For 3399/3401 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 8224 event pairs, 254 based on Foata normal form. 8/1049 useless extension candidates. Maximal degree in co-relation 3109. Up to 666 conditions per place. [2024-05-12 12:48:10,219 INFO L140 encePairwiseOnDemand]: 29/36 looper letters, 54 selfloop transitions, 19 changer transitions 0/85 dead transitions. [2024-05-12 12:48:10,219 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 85 transitions, 624 flow [2024-05-12 12:48:10,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 12:48:10,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 12:48:10,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 149 transitions. [2024-05-12 12:48:10,220 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5912698412698413 [2024-05-12 12:48:10,220 INFO L175 Difference]: Start difference. First operand has 99 places, 65 transitions, 468 flow. Second operand 7 states and 149 transitions. [2024-05-12 12:48:10,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 85 transitions, 624 flow [2024-05-12 12:48:10,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 85 transitions, 495 flow, removed 5 selfloop flow, removed 31 redundant places. [2024-05-12 12:48:10,226 INFO L231 Difference]: Finished difference. Result has 73 places, 64 transitions, 327 flow [2024-05-12 12:48:10,226 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=289, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=327, PETRI_PLACES=73, PETRI_TRANSITIONS=64} [2024-05-12 12:48:10,227 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 35 predicate places. [2024-05-12 12:48:10,227 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 64 transitions, 327 flow [2024-05-12 12:48:10,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:48:10,227 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:48:10,227 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:48:10,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-05-12 12:48:10,227 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 12:48:10,228 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:48:10,228 INFO L85 PathProgramCache]: Analyzing trace with hash 1414511834, now seen corresponding path program 1 times [2024-05-12 12:48:10,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:48:10,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861037853] [2024-05-12 12:48:10,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:48:10,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:48:10,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:48:10,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:48:10,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:48:10,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861037853] [2024-05-12 12:48:10,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861037853] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:48:10,298 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:48:10,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 12:48:10,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062721594] [2024-05-12 12:48:10,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:48:10,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-05-12 12:48:10,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:48:10,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-05-12 12:48:10,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-05-12 12:48:10,310 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 36 [2024-05-12 12:48:10,310 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 64 transitions, 327 flow. Second operand has 5 states, 5 states have (on average 21.4) internal successors, (107), 5 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:48:10,310 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:48:10,310 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 36 [2024-05-12 12:48:10,310 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:48:10,396 INFO L124 PetriNetUnfolderBase]: 328/978 cut-off events. [2024-05-12 12:48:10,397 INFO L125 PetriNetUnfolderBase]: For 582/624 co-relation queries the response was YES. [2024-05-12 12:48:10,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2303 conditions, 978 events. 328/978 cut-off events. For 582/624 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 7039 event pairs, 15 based on Foata normal form. 70/990 useless extension candidates. Maximal degree in co-relation 2284. Up to 312 conditions per place. [2024-05-12 12:48:10,400 INFO L140 encePairwiseOnDemand]: 31/36 looper letters, 22 selfloop transitions, 17 changer transitions 0/74 dead transitions. [2024-05-12 12:48:10,401 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 74 transitions, 429 flow [2024-05-12 12:48:10,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 12:48:10,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 12:48:10,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 125 transitions. [2024-05-12 12:48:10,402 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6944444444444444 [2024-05-12 12:48:10,402 INFO L175 Difference]: Start difference. First operand has 73 places, 64 transitions, 327 flow. Second operand 5 states and 125 transitions. [2024-05-12 12:48:10,402 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 74 transitions, 429 flow [2024-05-12 12:48:10,403 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 74 transitions, 392 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-05-12 12:48:10,405 INFO L231 Difference]: Finished difference. Result has 74 places, 65 transitions, 352 flow [2024-05-12 12:48:10,406 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=290, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=352, PETRI_PLACES=74, PETRI_TRANSITIONS=65} [2024-05-12 12:48:10,406 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 36 predicate places. [2024-05-12 12:48:10,406 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 65 transitions, 352 flow [2024-05-12 12:48:10,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.4) internal successors, (107), 5 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:48:10,407 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:48:10,407 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] [2024-05-12 12:48:10,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-05-12 12:48:10,407 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 12:48:10,407 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:48:10,408 INFO L85 PathProgramCache]: Analyzing trace with hash -927418607, now seen corresponding path program 1 times [2024-05-12 12:48:10,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:48:10,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619596277] [2024-05-12 12:48:10,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:48:10,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:48:10,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:48:10,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:48:10,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:48:10,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619596277] [2024-05-12 12:48:10,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619596277] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:48:10,519 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:48:10,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:48:10,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646182388] [2024-05-12 12:48:10,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:48:10,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-05-12 12:48:10,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:48:10,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-05-12 12:48:10,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-05-12 12:48:10,536 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 36 [2024-05-12 12:48:10,536 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 65 transitions, 352 flow. Second operand has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:48:10,536 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:48:10,536 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 36 [2024-05-12 12:48:10,537 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:48:10,647 INFO L124 PetriNetUnfolderBase]: 297/937 cut-off events. [2024-05-12 12:48:10,647 INFO L125 PetriNetUnfolderBase]: For 714/715 co-relation queries the response was YES. [2024-05-12 12:48:10,649 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2421 conditions, 937 events. 297/937 cut-off events. For 714/715 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 6914 event pairs, 127 based on Foata normal form. 21/883 useless extension candidates. Maximal degree in co-relation 2400. Up to 353 conditions per place. [2024-05-12 12:48:10,650 INFO L140 encePairwiseOnDemand]: 29/36 looper letters, 22 selfloop transitions, 9 changer transitions 26/78 dead transitions. [2024-05-12 12:48:10,650 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 78 transitions, 484 flow [2024-05-12 12:48:10,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 12:48:10,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 12:48:10,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 118 transitions. [2024-05-12 12:48:10,652 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6555555555555556 [2024-05-12 12:48:10,652 INFO L175 Difference]: Start difference. First operand has 74 places, 65 transitions, 352 flow. Second operand 5 states and 118 transitions. [2024-05-12 12:48:10,652 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 78 transitions, 484 flow [2024-05-12 12:48:10,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 78 transitions, 468 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-05-12 12:48:10,654 INFO L231 Difference]: Finished difference. Result has 79 places, 47 transitions, 251 flow [2024-05-12 12:48:10,655 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=336, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=251, PETRI_PLACES=79, PETRI_TRANSITIONS=47} [2024-05-12 12:48:10,656 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 41 predicate places. [2024-05-12 12:48:10,656 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 47 transitions, 251 flow [2024-05-12 12:48:10,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:48:10,656 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:48:10,656 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] [2024-05-12 12:48:10,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-05-12 12:48:10,657 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 12:48:10,657 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:48:10,657 INFO L85 PathProgramCache]: Analyzing trace with hash -507670819, now seen corresponding path program 2 times [2024-05-12 12:48:10,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:48:10,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419592094] [2024-05-12 12:48:10,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:48:10,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:48:10,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:48:10,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:48:10,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:48:10,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419592094] [2024-05-12 12:48:10,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419592094] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:48:10,750 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:48:10,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 12:48:10,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312430287] [2024-05-12 12:48:10,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:48:10,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 12:48:10,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:48:10,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 12:48:10,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-05-12 12:48:10,777 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 36 [2024-05-12 12:48:10,777 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 47 transitions, 251 flow. Second operand has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:48:10,778 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:48:10,778 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 36 [2024-05-12 12:48:10,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:48:10,855 INFO L124 PetriNetUnfolderBase]: 151/471 cut-off events. [2024-05-12 12:48:10,856 INFO L125 PetriNetUnfolderBase]: For 379/379 co-relation queries the response was YES. [2024-05-12 12:48:10,857 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1331 conditions, 471 events. 151/471 cut-off events. For 379/379 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 2778 event pairs, 70 based on Foata normal form. 8/432 useless extension candidates. Maximal degree in co-relation 1307. Up to 209 conditions per place. [2024-05-12 12:48:10,858 INFO L140 encePairwiseOnDemand]: 30/36 looper letters, 19 selfloop transitions, 4 changer transitions 21/61 dead transitions. [2024-05-12 12:48:10,858 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 61 transitions, 373 flow [2024-05-12 12:48:10,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 12:48:10,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 12:48:10,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 137 transitions. [2024-05-12 12:48:10,859 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6342592592592593 [2024-05-12 12:48:10,859 INFO L175 Difference]: Start difference. First operand has 79 places, 47 transitions, 251 flow. Second operand 6 states and 137 transitions. [2024-05-12 12:48:10,859 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 61 transitions, 373 flow [2024-05-12 12:48:10,861 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 61 transitions, 314 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-05-12 12:48:10,861 INFO L231 Difference]: Finished difference. Result has 65 places, 37 transitions, 163 flow [2024-05-12 12:48:10,861 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=196, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=163, PETRI_PLACES=65, PETRI_TRANSITIONS=37} [2024-05-12 12:48:10,862 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 27 predicate places. [2024-05-12 12:48:10,862 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 37 transitions, 163 flow [2024-05-12 12:48:10,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:48:10,862 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:48:10,862 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] [2024-05-12 12:48:10,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-05-12 12:48:10,863 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 12:48:10,863 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:48:10,863 INFO L85 PathProgramCache]: Analyzing trace with hash 1214593465, now seen corresponding path program 3 times [2024-05-12 12:48:10,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:48:10,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343599929] [2024-05-12 12:48:10,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:48:10,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:48:10,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:48:10,936 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:48:10,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:48:10,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343599929] [2024-05-12 12:48:10,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343599929] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:48:10,937 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:48:10,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 12:48:10,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849966836] [2024-05-12 12:48:10,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:48:10,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 12:48:10,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:48:10,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 12:48:10,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-05-12 12:48:10,969 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 36 [2024-05-12 12:48:10,969 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 37 transitions, 163 flow. Second operand has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 6 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:48:10,970 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:48:10,970 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 36 [2024-05-12 12:48:10,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:48:11,040 INFO L124 PetriNetUnfolderBase]: 74/208 cut-off events. [2024-05-12 12:48:11,040 INFO L125 PetriNetUnfolderBase]: For 138/138 co-relation queries the response was YES. [2024-05-12 12:48:11,041 INFO L83 FinitePrefix]: Finished finitePrefix Result has 561 conditions, 208 events. 74/208 cut-off events. For 138/138 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 865 event pairs, 23 based on Foata normal form. 12/196 useless extension candidates. Maximal degree in co-relation 551. Up to 91 conditions per place. [2024-05-12 12:48:11,041 INFO L140 encePairwiseOnDemand]: 29/36 looper letters, 0 selfloop transitions, 0 changer transitions 42/42 dead transitions. [2024-05-12 12:48:11,041 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 42 transitions, 225 flow [2024-05-12 12:48:11,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 12:48:11,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 12:48:11,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 137 transitions. [2024-05-12 12:48:11,042 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5436507936507936 [2024-05-12 12:48:11,042 INFO L175 Difference]: Start difference. First operand has 65 places, 37 transitions, 163 flow. Second operand 7 states and 137 transitions. [2024-05-12 12:48:11,042 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 42 transitions, 225 flow [2024-05-12 12:48:11,043 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 42 transitions, 191 flow, removed 4 selfloop flow, removed 9 redundant places. [2024-05-12 12:48:11,043 INFO L231 Difference]: Finished difference. Result has 53 places, 0 transitions, 0 flow [2024-05-12 12:48:11,044 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=123, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=0, PETRI_PLACES=53, PETRI_TRANSITIONS=0} [2024-05-12 12:48:11,044 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 15 predicate places. [2024-05-12 12:48:11,044 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 0 transitions, 0 flow [2024-05-12 12:48:11,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 6 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:48:11,046 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (4 of 5 remaining) [2024-05-12 12:48:11,047 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 5 remaining) [2024-05-12 12:48:11,047 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2024-05-12 12:48:11,047 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 5 remaining) [2024-05-12 12:48:11,047 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 5 remaining) [2024-05-12 12:48:11,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-05-12 12:48:11,048 INFO L445 BasicCegarLoop]: Path program histogram: [6, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:48:11,050 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2024-05-12 12:48:11,050 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2024-05-12 12:48:11,053 INFO L507 ceAbstractionStarter]: Automizer considered 2 witness invariants [2024-05-12 12:48:11,054 INFO L508 ceAbstractionStarter]: WitnessConsidered=2 [2024-05-12 12:48:11,055 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.05 12:48:11 BasicIcfg [2024-05-12 12:48:11,055 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-05-12 12:48:11,055 INFO L158 Benchmark]: Toolchain (without parser) took 9784.75ms. Allocated memory was 169.9MB in the beginning and 400.6MB in the end (delta: 230.7MB). Free memory was 95.6MB in the beginning and 255.9MB in the end (delta: -160.2MB). Peak memory consumption was 72.4MB. Max. memory is 16.1GB. [2024-05-12 12:48:11,055 INFO L158 Benchmark]: Witness Parser took 0.16ms. Allocated memory is still 113.2MB. Free memory was 74.2MB in the beginning and 74.1MB in the end (delta: 139.8kB). There was no memory consumed. Max. memory is 16.1GB. [2024-05-12 12:48:11,055 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 169.9MB. Free memory is still 142.6MB. There was no memory consumed. Max. memory is 16.1GB. [2024-05-12 12:48:11,056 INFO L158 Benchmark]: CACSL2BoogieTranslator took 563.57ms. Allocated memory is still 169.9MB. Free memory was 95.3MB in the beginning and 137.5MB in the end (delta: -42.2MB). Peak memory consumption was 30.3MB. Max. memory is 16.1GB. [2024-05-12 12:48:11,056 INFO L158 Benchmark]: Boogie Procedure Inliner took 61.34ms. Allocated memory is still 169.9MB. Free memory was 137.5MB in the beginning and 134.9MB in the end (delta: 2.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-05-12 12:48:11,056 INFO L158 Benchmark]: Boogie Preprocessor took 48.96ms. Allocated memory is still 169.9MB. Free memory was 134.9MB in the beginning and 132.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-05-12 12:48:11,056 INFO L158 Benchmark]: RCFGBuilder took 375.18ms. Allocated memory is still 169.9MB. Free memory was 132.8MB in the beginning and 111.4MB in the end (delta: 21.4MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. [2024-05-12 12:48:11,057 INFO L158 Benchmark]: TraceAbstraction took 8730.53ms. Allocated memory was 169.9MB in the beginning and 400.6MB in the end (delta: 230.7MB). Free memory was 110.6MB in the beginning and 255.9MB in the end (delta: -145.3MB). Peak memory consumption was 84.1MB. Max. memory is 16.1GB. [2024-05-12 12:48:11,058 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 113.2MB. Free memory was 74.2MB in the beginning and 74.1MB in the end (delta: 139.8kB). There was no memory consumed. Max. memory is 16.1GB. * CDTParser took 0.15ms. Allocated memory is still 169.9MB. Free memory is still 142.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 563.57ms. Allocated memory is still 169.9MB. Free memory was 95.3MB in the beginning and 137.5MB in the end (delta: -42.2MB). Peak memory consumption was 30.3MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 61.34ms. Allocated memory is still 169.9MB. Free memory was 137.5MB in the beginning and 134.9MB in the end (delta: 2.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 48.96ms. Allocated memory is still 169.9MB. Free memory was 134.9MB in the beginning and 132.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 375.18ms. Allocated memory is still 169.9MB. Free memory was 132.8MB in the beginning and 111.4MB in the end (delta: 21.4MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. * TraceAbstraction took 8730.53ms. Allocated memory was 169.9MB in the beginning and 400.6MB in the end (delta: 230.7MB). Free memory was 110.6MB in the beginning and 255.9MB in the end (delta: -145.3MB). Peak memory consumption was 84.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 763]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 764]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 18]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 53 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: 8.6s, OverallIterations: 34, TraceHistogramMax: 1, PathProgramHistogramMax: 6, EmptinessCheckTime: 0.0s, AutomataDifference: 4.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1542 SdHoareTripleChecker+Valid, 2.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1115 mSDsluCounter, 556 SdHoareTripleChecker+Invalid, 1.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 387 mSDsCounter, 138 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 4615 IncrementalHoareTripleChecker+Invalid, 4753 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 138 mSolverCounterUnsat, 169 mSDtfsCounter, 4615 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 161 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=470occurred in iteration=28, InterpolantAutomatonStates: 202, 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, 3.2s InterpolantComputationTime, 562 NumberOfCodeBlocks, 562 NumberOfCodeBlocksAsserted, 34 NumberOfCheckSat, 528 ConstructedInterpolants, 0 QuantifiedInterpolants, 3438 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 34 InterpolantComputations, 34 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 3 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2024-05-12 12:48:11,087 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