./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe022_tso.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe022_tso.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb4cb34f 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/safe022_tso.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe022_tso.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-eb4cb34-m [2024-06-21 20:15:59,894 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-21 20:15:59,988 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-21 20:15:59,993 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-21 20:15:59,993 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-21 20:16:00,024 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-21 20:16:00,025 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-21 20:16:00,026 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-21 20:16:00,026 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-21 20:16:00,030 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-21 20:16:00,030 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-21 20:16:00,031 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-21 20:16:00,032 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-21 20:16:00,033 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-21 20:16:00,033 INFO L153 SettingsManager]: * Use SBE=true [2024-06-21 20:16:00,033 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-21 20:16:00,034 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-21 20:16:00,034 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-21 20:16:00,035 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-21 20:16:00,035 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-21 20:16:00,036 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-21 20:16:00,036 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-21 20:16:00,036 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-21 20:16:00,037 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-21 20:16:00,037 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-21 20:16:00,037 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-21 20:16:00,037 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-21 20:16:00,038 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-21 20:16:00,038 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-21 20:16:00,038 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-21 20:16:00,039 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-21 20:16:00,040 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-21 20:16:00,040 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 20:16:00,040 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-21 20:16:00,040 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-21 20:16:00,041 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-21 20:16:00,041 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-21 20:16:00,041 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-21 20:16:00,041 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-21 20:16:00,041 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-21 20:16:00,042 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-21 20:16:00,042 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-21 20:16:00,042 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-21 20:16:00,042 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-21 20:16:00,303 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-21 20:16:00,324 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-21 20:16:00,326 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-21 20:16:00,327 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-21 20:16:00,328 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-21 20:16:00,328 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe022_tso.yml/witness.yml [2024-06-21 20:16:00,415 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-21 20:16:00,415 INFO L274 PluginConnector]: CDTParser initialized [2024-06-21 20:16:00,416 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe022_tso.i [2024-06-21 20:16:01,565 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-21 20:16:01,822 INFO L384 CDTParser]: Found 1 translation units. [2024-06-21 20:16:01,823 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe022_tso.i [2024-06-21 20:16:01,835 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eee1bdc3d/60976923061040dd9f1491e5b4453a38/FLAGb70b3de1b [2024-06-21 20:16:01,846 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eee1bdc3d/60976923061040dd9f1491e5b4453a38 [2024-06-21 20:16:01,847 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-21 20:16:01,848 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-21 20:16:01,852 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-21 20:16:01,852 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-21 20:16:01,857 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-21 20:16:01,858 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 08:16:00" (1/2) ... [2024-06-21 20:16:01,858 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@74921f71 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:16:01, skipping insertion in model container [2024-06-21 20:16:01,859 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 08:16:00" (1/2) ... [2024-06-21 20:16:01,862 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@50d0b0a2 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:16:01, skipping insertion in model container [2024-06-21 20:16:01,863 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 08:16:01" (2/2) ... [2024-06-21 20:16:01,863 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@74921f71 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:16:01, skipping insertion in model container [2024-06-21 20:16:01,863 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 08:16:01" (2/2) ... [2024-06-21 20:16:01,864 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-21 20:16:01,920 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-21 20:16:01,922 INFO L97 edCorrectnessWitness]: Location invariant before [L763-L763] (((((! multithreaded || (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || ((((0 <= __unbuffered_cnt && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) && (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1)) && (x == 0 || x == 1)) && (y == 0 || y == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt) [2024-06-21 20:16:01,922 INFO L97 edCorrectnessWitness]: Location invariant before [L764-L764] (((((! multithreaded || (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || ((((0 <= __unbuffered_cnt && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) && (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1)) && (x == 0 || x == 1)) && (y == 0 || y == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt) [2024-06-21 20:16:01,922 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-21 20:16:01,922 INFO L106 edCorrectnessWitness]: ghost_update [L761-L761] multithreaded = 1; [2024-06-21 20:16:01,969 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-21 20:16:02,249 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 20:16:02,258 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-21 20:16:02,373 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 20:16:02,420 INFO L206 MainTranslator]: Completed translation [2024-06-21 20:16:02,421 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:16:02 WrapperNode [2024-06-21 20:16:02,421 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-21 20:16:02,422 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-21 20:16:02,422 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-21 20:16:02,423 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-21 20:16:02,428 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:16:02" (1/1) ... [2024-06-21 20:16:02,461 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:16:02" (1/1) ... [2024-06-21 20:16:02,486 INFO L138 Inliner]: procedures = 174, calls = 33, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 57 [2024-06-21 20:16:02,487 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-21 20:16:02,488 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-21 20:16:02,488 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-21 20:16:02,488 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-21 20:16:02,498 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:16:02" (1/1) ... [2024-06-21 20:16:02,499 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:16:02" (1/1) ... [2024-06-21 20:16:02,506 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:16:02" (1/1) ... [2024-06-21 20:16:02,532 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-21 20:16:02,533 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:16:02" (1/1) ... [2024-06-21 20:16:02,533 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:16:02" (1/1) ... [2024-06-21 20:16:02,546 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:16:02" (1/1) ... [2024-06-21 20:16:02,548 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:16:02" (1/1) ... [2024-06-21 20:16:02,553 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:16:02" (1/1) ... [2024-06-21 20:16:02,554 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:16:02" (1/1) ... [2024-06-21 20:16:02,555 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-21 20:16:02,560 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-21 20:16:02,560 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-21 20:16:02,560 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-21 20:16:02,561 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:16:02" (1/1) ... [2024-06-21 20:16:02,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 20:16:02,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-21 20:16:02,589 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-21 20:16:02,614 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-21 20:16:02,632 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-21 20:16:02,633 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-21 20:16:02,633 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-21 20:16:02,633 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-21 20:16:02,633 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-21 20:16:02,633 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-21 20:16:02,634 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-21 20:16:02,634 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-21 20:16:02,634 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-21 20:16:02,634 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-21 20:16:02,636 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-21 20:16:02,765 INFO L244 CfgBuilder]: Building ICFG [2024-06-21 20:16:02,767 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-21 20:16:02,890 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-21 20:16:02,890 INFO L293 CfgBuilder]: Performing block encoding [2024-06-21 20:16:02,969 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-21 20:16:02,970 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-21 20:16:02,970 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 08:16:02 BoogieIcfgContainer [2024-06-21 20:16:02,970 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-21 20:16:02,972 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-21 20:16:02,972 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-21 20:16:02,975 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-21 20:16:02,975 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 08:16:00" (1/4) ... [2024-06-21 20:16:02,976 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73d90139 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 08:16:02, skipping insertion in model container [2024-06-21 20:16:02,976 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.06 08:16:01" (2/4) ... [2024-06-21 20:16:02,991 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73d90139 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 08:16:02, skipping insertion in model container [2024-06-21 20:16:02,991 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:16:02" (3/4) ... [2024-06-21 20:16:02,991 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73d90139 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 08:16:02, skipping insertion in model container [2024-06-21 20:16:02,992 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 08:16:02" (4/4) ... [2024-06-21 20:16:02,993 INFO L112 eAbstractionObserver]: Analyzing ICFG safe022_tso.i [2024-06-21 20:16:03,008 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-21 20:16:03,009 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-06-21 20:16:03,009 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-21 20:16:03,051 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-21 20:16:03,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 36 places, 29 transitions, 66 flow [2024-06-21 20:16:03,114 INFO L124 PetriNetUnfolderBase]: 0/27 cut-off events. [2024-06-21 20:16:03,120 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 20:16:03,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34 conditions, 27 events. 0/27 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 39 event pairs, 0 based on Foata normal form. 0/25 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-21 20:16:03,123 INFO L82 GeneralOperation]: Start removeDead. Operand has 36 places, 29 transitions, 66 flow [2024-06-21 20:16:03,127 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 28 places, 21 transitions, 48 flow [2024-06-21 20:16:03,149 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-21 20:16:03,157 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;@a74d43d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-21 20:16:03,157 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-06-21 20:16:03,168 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-21 20:16:03,169 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-21 20:16:03,169 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 20:16:03,169 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:16:03,170 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-21 20:16:03,171 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:16:03,175 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:16:03,175 INFO L85 PathProgramCache]: Analyzing trace with hash 188072989, now seen corresponding path program 1 times [2024-06-21 20:16:03,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:16:03,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369400203] [2024-06-21 20:16:03,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:16:03,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:16:03,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:16:03,561 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:16:03,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:16:03,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369400203] [2024-06-21 20:16:03,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369400203] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:16:03,563 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:16:03,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-21 20:16:03,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32441602] [2024-06-21 20:16:03,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:16:03,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-21 20:16:03,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:16:03,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-21 20:16:03,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-21 20:16:03,652 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 29 [2024-06-21 20:16:03,655 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 21 transitions, 48 flow. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:16:03,655 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:16:03,655 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 29 [2024-06-21 20:16:03,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:16:03,736 INFO L124 PetriNetUnfolderBase]: 65/142 cut-off events. [2024-06-21 20:16:03,737 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2024-06-21 20:16:03,739 INFO L83 FinitePrefix]: Finished finitePrefix Result has 287 conditions, 142 events. 65/142 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 481 event pairs, 33 based on Foata normal form. 1/132 useless extension candidates. Maximal degree in co-relation 276. Up to 124 conditions per place. [2024-06-21 20:16:03,745 INFO L140 encePairwiseOnDemand]: 24/29 looper letters, 17 selfloop transitions, 3 changer transitions 0/27 dead transitions. [2024-06-21 20:16:03,746 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 27 transitions, 103 flow [2024-06-21 20:16:03,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-21 20:16:03,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-21 20:16:03,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 61 transitions. [2024-06-21 20:16:03,761 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7011494252873564 [2024-06-21 20:16:03,762 INFO L175 Difference]: Start difference. First operand has 28 places, 21 transitions, 48 flow. Second operand 3 states and 61 transitions. [2024-06-21 20:16:03,763 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 27 transitions, 103 flow [2024-06-21 20:16:03,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 27 transitions, 100 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-06-21 20:16:03,766 INFO L231 Difference]: Finished difference. Result has 29 places, 23 transitions, 67 flow [2024-06-21 20:16:03,767 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=67, PETRI_PLACES=29, PETRI_TRANSITIONS=23} [2024-06-21 20:16:03,771 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 1 predicate places. [2024-06-21 20:16:03,771 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 23 transitions, 67 flow [2024-06-21 20:16:03,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:16:03,771 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:16:03,771 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:16:03,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-21 20:16:03,772 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:16:03,773 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:16:03,773 INFO L85 PathProgramCache]: Analyzing trace with hash 349547388, now seen corresponding path program 1 times [2024-06-21 20:16:03,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:16:03,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223606750] [2024-06-21 20:16:03,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:16:03,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:16:03,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:16:03,892 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:16:03,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:16:03,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223606750] [2024-06-21 20:16:03,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223606750] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:16:03,893 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:16:03,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 20:16:03,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473229940] [2024-06-21 20:16:03,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:16:03,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 20:16:03,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:16:03,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 20:16:03,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-21 20:16:03,917 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 29 [2024-06-21 20:16:03,917 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 23 transitions, 67 flow. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:16:03,917 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:16:03,918 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 29 [2024-06-21 20:16:03,918 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:16:03,993 INFO L124 PetriNetUnfolderBase]: 82/177 cut-off events. [2024-06-21 20:16:03,994 INFO L125 PetriNetUnfolderBase]: For 35/35 co-relation queries the response was YES. [2024-06-21 20:16:03,994 INFO L83 FinitePrefix]: Finished finitePrefix Result has 408 conditions, 177 events. 82/177 cut-off events. For 35/35 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 625 event pairs, 34 based on Foata normal form. 2/177 useless extension candidates. Maximal degree in co-relation 396. Up to 144 conditions per place. [2024-06-21 20:16:03,996 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 24 selfloop transitions, 5 changer transitions 0/35 dead transitions. [2024-06-21 20:16:03,996 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 35 transitions, 156 flow [2024-06-21 20:16:03,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 20:16:03,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 20:16:03,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 77 transitions. [2024-06-21 20:16:03,998 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6637931034482759 [2024-06-21 20:16:03,998 INFO L175 Difference]: Start difference. First operand has 29 places, 23 transitions, 67 flow. Second operand 4 states and 77 transitions. [2024-06-21 20:16:03,998 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 35 transitions, 156 flow [2024-06-21 20:16:03,999 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 35 transitions, 152 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-21 20:16:04,000 INFO L231 Difference]: Finished difference. Result has 33 places, 27 transitions, 100 flow [2024-06-21 20:16:04,000 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=100, PETRI_PLACES=33, PETRI_TRANSITIONS=27} [2024-06-21 20:16:04,001 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 5 predicate places. [2024-06-21 20:16:04,001 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 27 transitions, 100 flow [2024-06-21 20:16:04,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:16:04,001 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:16:04,001 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:16:04,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-21 20:16:04,002 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:16:04,002 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:16:04,003 INFO L85 PathProgramCache]: Analyzing trace with hash -2048931818, now seen corresponding path program 1 times [2024-06-21 20:16:04,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:16:04,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99983681] [2024-06-21 20:16:04,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:16:04,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:16:04,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:16:04,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:16:04,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:16:04,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99983681] [2024-06-21 20:16:04,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99983681] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:16:04,157 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:16:04,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 20:16:04,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653011090] [2024-06-21 20:16:04,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:16:04,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 20:16:04,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:16:04,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 20:16:04,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 20:16:04,190 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 29 [2024-06-21 20:16:04,191 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 27 transitions, 100 flow. Second operand has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:16:04,191 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:16:04,191 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 29 [2024-06-21 20:16:04,191 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:16:04,283 INFO L124 PetriNetUnfolderBase]: 97/202 cut-off events. [2024-06-21 20:16:04,283 INFO L125 PetriNetUnfolderBase]: For 118/118 co-relation queries the response was YES. [2024-06-21 20:16:04,286 INFO L83 FinitePrefix]: Finished finitePrefix Result has 533 conditions, 202 events. 97/202 cut-off events. For 118/118 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 721 event pairs, 28 based on Foata normal form. 2/203 useless extension candidates. Maximal degree in co-relation 518. Up to 161 conditions per place. [2024-06-21 20:16:04,288 INFO L140 encePairwiseOnDemand]: 22/29 looper letters, 33 selfloop transitions, 7 changer transitions 0/45 dead transitions. [2024-06-21 20:16:04,289 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 45 transitions, 231 flow [2024-06-21 20:16:04,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 20:16:04,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 20:16:04,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 91 transitions. [2024-06-21 20:16:04,294 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6275862068965518 [2024-06-21 20:16:04,294 INFO L175 Difference]: Start difference. First operand has 33 places, 27 transitions, 100 flow. Second operand 5 states and 91 transitions. [2024-06-21 20:16:04,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 45 transitions, 231 flow [2024-06-21 20:16:04,297 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 45 transitions, 231 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-06-21 20:16:04,301 INFO L231 Difference]: Finished difference. Result has 40 places, 33 transitions, 156 flow [2024-06-21 20:16:04,301 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=156, PETRI_PLACES=40, PETRI_TRANSITIONS=33} [2024-06-21 20:16:04,302 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 12 predicate places. [2024-06-21 20:16:04,302 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 33 transitions, 156 flow [2024-06-21 20:16:04,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:16:04,303 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:16:04,303 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:16:04,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-21 20:16:04,304 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:16:04,306 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:16:04,306 INFO L85 PathProgramCache]: Analyzing trace with hash -1928421163, now seen corresponding path program 1 times [2024-06-21 20:16:04,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:16:04,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96142006] [2024-06-21 20:16:04,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:16:04,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:16:04,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:16:04,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:16:04,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:16:04,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96142006] [2024-06-21 20:16:04,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96142006] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:16:04,504 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:16:04,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:16:04,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293498020] [2024-06-21 20:16:04,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:16:04,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:16:04,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:16:04,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:16:04,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:16:04,553 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 29 [2024-06-21 20:16:04,553 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 33 transitions, 156 flow. Second operand has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:16:04,553 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:16:04,554 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 29 [2024-06-21 20:16:04,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:16:04,637 INFO L124 PetriNetUnfolderBase]: 93/194 cut-off events. [2024-06-21 20:16:04,638 INFO L125 PetriNetUnfolderBase]: For 224/224 co-relation queries the response was YES. [2024-06-21 20:16:04,639 INFO L83 FinitePrefix]: Finished finitePrefix Result has 593 conditions, 194 events. 93/194 cut-off events. For 224/224 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 675 event pairs, 12 based on Foata normal form. 4/197 useless extension candidates. Maximal degree in co-relation 573. Up to 135 conditions per place. [2024-06-21 20:16:04,640 INFO L140 encePairwiseOnDemand]: 22/29 looper letters, 33 selfloop transitions, 8 changer transitions 0/46 dead transitions. [2024-06-21 20:16:04,640 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 46 transitions, 264 flow [2024-06-21 20:16:04,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:16:04,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:16:04,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 103 transitions. [2024-06-21 20:16:04,641 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5919540229885057 [2024-06-21 20:16:04,642 INFO L175 Difference]: Start difference. First operand has 40 places, 33 transitions, 156 flow. Second operand 6 states and 103 transitions. [2024-06-21 20:16:04,642 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 46 transitions, 264 flow [2024-06-21 20:16:04,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 46 transitions, 264 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-06-21 20:16:04,644 INFO L231 Difference]: Finished difference. Result has 45 places, 32 transitions, 168 flow [2024-06-21 20:16:04,644 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=168, PETRI_PLACES=45, PETRI_TRANSITIONS=32} [2024-06-21 20:16:04,645 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 17 predicate places. [2024-06-21 20:16:04,645 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 32 transitions, 168 flow [2024-06-21 20:16:04,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:16:04,646 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:16:04,646 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:16:04,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-21 20:16:04,646 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:16:04,647 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:16:04,647 INFO L85 PathProgramCache]: Analyzing trace with hash 446718973, now seen corresponding path program 1 times [2024-06-21 20:16:04,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:16:04,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134122703] [2024-06-21 20:16:04,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:16:04,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:16:04,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:16:04,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:16:04,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:16:04,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134122703] [2024-06-21 20:16:04,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134122703] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:16:04,815 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:16:04,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:16:04,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058812494] [2024-06-21 20:16:04,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:16:04,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:16:04,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:16:04,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:16:04,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:16:04,844 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 29 [2024-06-21 20:16:04,845 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 32 transitions, 168 flow. Second operand has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:16:04,845 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:16:04,845 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 29 [2024-06-21 20:16:04,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:16:04,912 INFO L124 PetriNetUnfolderBase]: 96/203 cut-off events. [2024-06-21 20:16:04,912 INFO L125 PetriNetUnfolderBase]: For 337/337 co-relation queries the response was YES. [2024-06-21 20:16:04,913 INFO L83 FinitePrefix]: Finished finitePrefix Result has 660 conditions, 203 events. 96/203 cut-off events. For 337/337 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 730 event pairs, 24 based on Foata normal form. 1/203 useless extension candidates. Maximal degree in co-relation 637. Up to 143 conditions per place. [2024-06-21 20:16:04,914 INFO L140 encePairwiseOnDemand]: 22/29 looper letters, 32 selfloop transitions, 13 changer transitions 0/50 dead transitions. [2024-06-21 20:16:04,914 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 50 transitions, 316 flow [2024-06-21 20:16:04,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:16:04,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:16:04,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 107 transitions. [2024-06-21 20:16:04,917 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6149425287356322 [2024-06-21 20:16:04,918 INFO L175 Difference]: Start difference. First operand has 45 places, 32 transitions, 168 flow. Second operand 6 states and 107 transitions. [2024-06-21 20:16:04,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 50 transitions, 316 flow [2024-06-21 20:16:04,920 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 50 transitions, 295 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-06-21 20:16:04,921 INFO L231 Difference]: Finished difference. Result has 46 places, 36 transitions, 198 flow [2024-06-21 20:16:04,921 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=147, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=198, PETRI_PLACES=46, PETRI_TRANSITIONS=36} [2024-06-21 20:16:04,922 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 18 predicate places. [2024-06-21 20:16:04,922 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 36 transitions, 198 flow [2024-06-21 20:16:04,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:16:04,923 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:16:04,923 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:16:04,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-21 20:16:04,923 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:16:04,924 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:16:04,924 INFO L85 PathProgramCache]: Analyzing trace with hash -1361247721, now seen corresponding path program 1 times [2024-06-21 20:16:04,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:16:04,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839502769] [2024-06-21 20:16:04,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:16:04,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:16:04,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:16:05,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:16:05,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:16:05,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839502769] [2024-06-21 20:16:05,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839502769] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:16:05,065 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:16:05,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:16:05,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390524177] [2024-06-21 20:16:05,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:16:05,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:16:05,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:16:05,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:16:05,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:16:05,094 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 29 [2024-06-21 20:16:05,094 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 36 transitions, 198 flow. Second operand has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:16:05,094 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:16:05,094 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 29 [2024-06-21 20:16:05,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:16:05,160 INFO L124 PetriNetUnfolderBase]: 102/213 cut-off events. [2024-06-21 20:16:05,160 INFO L125 PetriNetUnfolderBase]: For 450/450 co-relation queries the response was YES. [2024-06-21 20:16:05,161 INFO L83 FinitePrefix]: Finished finitePrefix Result has 734 conditions, 213 events. 102/213 cut-off events. For 450/450 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 771 event pairs, 24 based on Foata normal form. 1/213 useless extension candidates. Maximal degree in co-relation 711. Up to 156 conditions per place. [2024-06-21 20:16:05,162 INFO L140 encePairwiseOnDemand]: 22/29 looper letters, 34 selfloop transitions, 14 changer transitions 0/53 dead transitions. [2024-06-21 20:16:05,162 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 53 transitions, 362 flow [2024-06-21 20:16:05,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:16:05,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:16:05,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 105 transitions. [2024-06-21 20:16:05,163 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.603448275862069 [2024-06-21 20:16:05,164 INFO L175 Difference]: Start difference. First operand has 46 places, 36 transitions, 198 flow. Second operand 6 states and 105 transitions. [2024-06-21 20:16:05,164 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 53 transitions, 362 flow [2024-06-21 20:16:05,166 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 53 transitions, 336 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-21 20:16:05,167 INFO L231 Difference]: Finished difference. Result has 50 places, 42 transitions, 246 flow [2024-06-21 20:16:05,167 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=246, PETRI_PLACES=50, PETRI_TRANSITIONS=42} [2024-06-21 20:16:05,168 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 22 predicate places. [2024-06-21 20:16:05,168 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 42 transitions, 246 flow [2024-06-21 20:16:05,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:16:05,169 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:16:05,169 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:16:05,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-21 20:16:05,169 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:16:05,170 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:16:05,170 INFO L85 PathProgramCache]: Analyzing trace with hash 446838943, now seen corresponding path program 2 times [2024-06-21 20:16:05,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:16:05,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994953236] [2024-06-21 20:16:05,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:16:05,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:16:05,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:16:05,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:16:05,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:16:05,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994953236] [2024-06-21 20:16:05,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994953236] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:16:05,282 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:16:05,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:16:05,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716320013] [2024-06-21 20:16:05,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:16:05,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:16:05,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:16:05,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:16:05,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:16:05,313 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 29 [2024-06-21 20:16:05,313 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 42 transitions, 246 flow. Second operand has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:16:05,313 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:16:05,314 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 29 [2024-06-21 20:16:05,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:16:05,384 INFO L124 PetriNetUnfolderBase]: 105/220 cut-off events. [2024-06-21 20:16:05,385 INFO L125 PetriNetUnfolderBase]: For 572/572 co-relation queries the response was YES. [2024-06-21 20:16:05,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 795 conditions, 220 events. 105/220 cut-off events. For 572/572 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 807 event pairs, 23 based on Foata normal form. 1/220 useless extension candidates. Maximal degree in co-relation 770. Up to 170 conditions per place. [2024-06-21 20:16:05,387 INFO L140 encePairwiseOnDemand]: 22/29 looper letters, 37 selfloop transitions, 12 changer transitions 0/54 dead transitions. [2024-06-21 20:16:05,387 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 54 transitions, 378 flow [2024-06-21 20:16:05,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:16:05,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:16:05,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 102 transitions. [2024-06-21 20:16:05,389 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5862068965517241 [2024-06-21 20:16:05,389 INFO L175 Difference]: Start difference. First operand has 50 places, 42 transitions, 246 flow. Second operand 6 states and 102 transitions. [2024-06-21 20:16:05,389 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 54 transitions, 378 flow [2024-06-21 20:16:05,392 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 54 transitions, 367 flow, removed 3 selfloop flow, removed 1 redundant places. [2024-06-21 20:16:05,393 INFO L231 Difference]: Finished difference. Result has 55 places, 44 transitions, 278 flow [2024-06-21 20:16:05,393 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=235, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=278, PETRI_PLACES=55, PETRI_TRANSITIONS=44} [2024-06-21 20:16:05,394 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 27 predicate places. [2024-06-21 20:16:05,394 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 44 transitions, 278 flow [2024-06-21 20:16:05,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:16:05,395 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:16:05,395 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:16:05,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-21 20:16:05,395 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:16:05,396 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:16:05,396 INFO L85 PathProgramCache]: Analyzing trace with hash 1917367571, now seen corresponding path program 2 times [2024-06-21 20:16:05,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:16:05,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161472236] [2024-06-21 20:16:05,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:16:05,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:16:05,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:16:05,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:16:05,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:16:05,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161472236] [2024-06-21 20:16:05,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161472236] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:16:05,531 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:16:05,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:16:05,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573191027] [2024-06-21 20:16:05,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:16:05,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:16:05,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:16:05,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:16:05,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:16:05,561 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 29 [2024-06-21 20:16:05,561 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 44 transitions, 278 flow. Second operand has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:16:05,562 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:16:05,562 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 29 [2024-06-21 20:16:05,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:16:05,631 INFO L124 PetriNetUnfolderBase]: 108/227 cut-off events. [2024-06-21 20:16:05,631 INFO L125 PetriNetUnfolderBase]: For 709/709 co-relation queries the response was YES. [2024-06-21 20:16:05,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 866 conditions, 227 events. 108/227 cut-off events. For 709/709 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 857 event pairs, 24 based on Foata normal form. 1/227 useless extension candidates. Maximal degree in co-relation 839. Up to 172 conditions per place. [2024-06-21 20:16:05,634 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 37 selfloop transitions, 12 changer transitions 0/54 dead transitions. [2024-06-21 20:16:05,634 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 54 transitions, 408 flow [2024-06-21 20:16:05,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 20:16:05,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 20:16:05,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 76 transitions. [2024-06-21 20:16:05,636 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6551724137931034 [2024-06-21 20:16:05,636 INFO L175 Difference]: Start difference. First operand has 55 places, 44 transitions, 278 flow. Second operand 4 states and 76 transitions. [2024-06-21 20:16:05,636 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 54 transitions, 408 flow [2024-06-21 20:16:05,639 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 54 transitions, 379 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-21 20:16:05,641 INFO L231 Difference]: Finished difference. Result has 54 places, 46 transitions, 301 flow [2024-06-21 20:16:05,645 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=249, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=301, PETRI_PLACES=54, PETRI_TRANSITIONS=46} [2024-06-21 20:16:05,646 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 26 predicate places. [2024-06-21 20:16:05,647 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 46 transitions, 301 flow [2024-06-21 20:16:05,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:16:05,647 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:16:05,647 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:16:05,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-21 20:16:05,648 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:16:05,648 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:16:05,648 INFO L85 PathProgramCache]: Analyzing trace with hash 1917130235, now seen corresponding path program 3 times [2024-06-21 20:16:05,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:16:05,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033828122] [2024-06-21 20:16:05,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:16:05,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:16:05,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:16:05,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:16:05,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:16:05,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033828122] [2024-06-21 20:16:05,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033828122] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:16:05,778 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:16:05,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:16:05,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979204232] [2024-06-21 20:16:05,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:16:05,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:16:05,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:16:05,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:16:05,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:16:05,803 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 29 [2024-06-21 20:16:05,804 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 46 transitions, 301 flow. Second operand has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:16:05,804 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:16:05,804 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 29 [2024-06-21 20:16:05,804 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:16:05,900 INFO L124 PetriNetUnfolderBase]: 106/224 cut-off events. [2024-06-21 20:16:05,900 INFO L125 PetriNetUnfolderBase]: For 851/851 co-relation queries the response was YES. [2024-06-21 20:16:05,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 881 conditions, 224 events. 106/224 cut-off events. For 851/851 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 840 event pairs, 23 based on Foata normal form. 1/224 useless extension candidates. Maximal degree in co-relation 854. Up to 160 conditions per place. [2024-06-21 20:16:05,903 INFO L140 encePairwiseOnDemand]: 22/29 looper letters, 38 selfloop transitions, 15 changer transitions 0/58 dead transitions. [2024-06-21 20:16:05,903 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 58 transitions, 437 flow [2024-06-21 20:16:05,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 20:16:05,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 20:16:05,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 92 transitions. [2024-06-21 20:16:05,904 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6344827586206897 [2024-06-21 20:16:05,904 INFO L175 Difference]: Start difference. First operand has 54 places, 46 transitions, 301 flow. Second operand 5 states and 92 transitions. [2024-06-21 20:16:05,905 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 58 transitions, 437 flow [2024-06-21 20:16:05,908 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 58 transitions, 421 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-06-21 20:16:05,909 INFO L231 Difference]: Finished difference. Result has 57 places, 46 transitions, 326 flow [2024-06-21 20:16:05,910 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=285, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=326, PETRI_PLACES=57, PETRI_TRANSITIONS=46} [2024-06-21 20:16:05,911 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 29 predicate places. [2024-06-21 20:16:05,911 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 46 transitions, 326 flow [2024-06-21 20:16:05,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:16:05,912 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:16:05,912 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:16:05,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-21 20:16:05,912 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:16:05,912 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:16:05,913 INFO L85 PathProgramCache]: Analyzing trace with hash 1917130421, now seen corresponding path program 3 times [2024-06-21 20:16:05,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:16:05,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004326157] [2024-06-21 20:16:05,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:16:05,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:16:05,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:16:06,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:16:06,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:16:06,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004326157] [2024-06-21 20:16:06,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004326157] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:16:06,044 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:16:06,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:16:06,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776130962] [2024-06-21 20:16:06,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:16:06,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:16:06,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:16:06,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:16:06,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:16:06,068 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 29 [2024-06-21 20:16:06,069 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 46 transitions, 326 flow. Second operand has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:16:06,069 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:16:06,069 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 29 [2024-06-21 20:16:06,069 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:16:06,122 INFO L124 PetriNetUnfolderBase]: 104/221 cut-off events. [2024-06-21 20:16:06,136 INFO L125 PetriNetUnfolderBase]: For 1014/1014 co-relation queries the response was YES. [2024-06-21 20:16:06,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 908 conditions, 221 events. 104/221 cut-off events. For 1014/1014 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 833 event pairs, 24 based on Foata normal form. 1/221 useless extension candidates. Maximal degree in co-relation 880. Up to 160 conditions per place. [2024-06-21 20:16:06,138 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 34 selfloop transitions, 16 changer transitions 0/55 dead transitions. [2024-06-21 20:16:06,139 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 55 transitions, 448 flow [2024-06-21 20:16:06,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 20:16:06,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 20:16:06,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 90 transitions. [2024-06-21 20:16:06,140 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6206896551724138 [2024-06-21 20:16:06,140 INFO L175 Difference]: Start difference. First operand has 57 places, 46 transitions, 326 flow. Second operand 5 states and 90 transitions. [2024-06-21 20:16:06,140 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 55 transitions, 448 flow [2024-06-21 20:16:06,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 55 transitions, 414 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-21 20:16:06,144 INFO L231 Difference]: Finished difference. Result has 58 places, 46 transitions, 332 flow [2024-06-21 20:16:06,144 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=292, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=332, PETRI_PLACES=58, PETRI_TRANSITIONS=46} [2024-06-21 20:16:06,145 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 30 predicate places. [2024-06-21 20:16:06,145 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 46 transitions, 332 flow [2024-06-21 20:16:06,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:16:06,145 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:16:06,145 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:16:06,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-21 20:16:06,146 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:16:06,146 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:16:06,146 INFO L85 PathProgramCache]: Analyzing trace with hash 1917376499, now seen corresponding path program 1 times [2024-06-21 20:16:06,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:16:06,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803320403] [2024-06-21 20:16:06,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:16:06,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:16:06,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:16:06,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:16:06,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:16:06,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803320403] [2024-06-21 20:16:06,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803320403] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:16:06,250 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:16:06,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:16:06,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436780507] [2024-06-21 20:16:06,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:16:06,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:16:06,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:16:06,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:16:06,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:16:06,280 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 29 [2024-06-21 20:16:06,280 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 46 transitions, 332 flow. Second operand has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:16:06,280 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:16:06,280 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 29 [2024-06-21 20:16:06,281 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:16:06,326 INFO L124 PetriNetUnfolderBase]: 101/216 cut-off events. [2024-06-21 20:16:06,326 INFO L125 PetriNetUnfolderBase]: For 967/967 co-relation queries the response was YES. [2024-06-21 20:16:06,327 INFO L83 FinitePrefix]: Finished finitePrefix Result has 884 conditions, 216 events. 101/216 cut-off events. For 967/967 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 790 event pairs, 23 based on Foata normal form. 2/217 useless extension candidates. Maximal degree in co-relation 855. Up to 173 conditions per place. [2024-06-21 20:16:06,328 INFO L140 encePairwiseOnDemand]: 25/29 looper letters, 41 selfloop transitions, 6 changer transitions 0/52 dead transitions. [2024-06-21 20:16:06,328 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 52 transitions, 440 flow [2024-06-21 20:16:06,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 20:16:06,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 20:16:06,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 70 transitions. [2024-06-21 20:16:06,330 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.603448275862069 [2024-06-21 20:16:06,331 INFO L175 Difference]: Start difference. First operand has 58 places, 46 transitions, 332 flow. Second operand 4 states and 70 transitions. [2024-06-21 20:16:06,331 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 52 transitions, 440 flow [2024-06-21 20:16:06,333 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 52 transitions, 403 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-21 20:16:06,334 INFO L231 Difference]: Finished difference. Result has 58 places, 46 transitions, 311 flow [2024-06-21 20:16:06,334 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=295, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=311, PETRI_PLACES=58, PETRI_TRANSITIONS=46} [2024-06-21 20:16:06,335 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 30 predicate places. [2024-06-21 20:16:06,335 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 46 transitions, 311 flow [2024-06-21 20:16:06,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:16:06,336 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:16:06,336 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:16:06,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-21 20:16:06,336 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:16:06,336 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:16:06,337 INFO L85 PathProgramCache]: Analyzing trace with hash 747269371, now seen corresponding path program 1 times [2024-06-21 20:16:06,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:16:06,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744249378] [2024-06-21 20:16:06,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:16:06,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:16:06,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:16:06,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:16:06,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:16:06,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744249378] [2024-06-21 20:16:06,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744249378] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:16:06,435 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:16:06,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:16:06,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715132978] [2024-06-21 20:16:06,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:16:06,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:16:06,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:16:06,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:16:06,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:16:06,467 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 29 [2024-06-21 20:16:06,468 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 46 transitions, 311 flow. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:16:06,468 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:16:06,468 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 29 [2024-06-21 20:16:06,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:16:06,535 INFO L124 PetriNetUnfolderBase]: 104/221 cut-off events. [2024-06-21 20:16:06,535 INFO L125 PetriNetUnfolderBase]: For 916/916 co-relation queries the response was YES. [2024-06-21 20:16:06,536 INFO L83 FinitePrefix]: Finished finitePrefix Result has 879 conditions, 221 events. 104/221 cut-off events. For 916/916 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 826 event pairs, 22 based on Foata normal form. 1/221 useless extension candidates. Maximal degree in co-relation 850. Up to 127 conditions per place. [2024-06-21 20:16:06,538 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 36 selfloop transitions, 24 changer transitions 0/65 dead transitions. [2024-06-21 20:16:06,538 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 65 transitions, 509 flow [2024-06-21 20:16:06,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:16:06,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:16:06,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-21 20:16:06,539 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6108374384236454 [2024-06-21 20:16:06,539 INFO L175 Difference]: Start difference. First operand has 58 places, 46 transitions, 311 flow. Second operand 7 states and 124 transitions. [2024-06-21 20:16:06,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 65 transitions, 509 flow [2024-06-21 20:16:06,542 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 65 transitions, 497 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-06-21 20:16:06,544 INFO L231 Difference]: Finished difference. Result has 63 places, 50 transitions, 380 flow [2024-06-21 20:16:06,544 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=299, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=380, PETRI_PLACES=63, PETRI_TRANSITIONS=50} [2024-06-21 20:16:06,544 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 35 predicate places. [2024-06-21 20:16:06,545 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 50 transitions, 380 flow [2024-06-21 20:16:06,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:16:06,545 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:16:06,545 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:16:06,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-21 20:16:06,546 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:16:06,546 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:16:06,546 INFO L85 PathProgramCache]: Analyzing trace with hash 750988441, now seen corresponding path program 2 times [2024-06-21 20:16:06,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:16:06,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749633016] [2024-06-21 20:16:06,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:16:06,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:16:06,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:16:06,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:16:06,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:16:06,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749633016] [2024-06-21 20:16:06,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749633016] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:16:06,651 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:16:06,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:16:06,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265539424] [2024-06-21 20:16:06,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:16:06,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:16:06,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:16:06,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:16:06,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:16:06,709 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 29 [2024-06-21 20:16:06,710 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 50 transitions, 380 flow. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:16:06,710 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:16:06,710 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 29 [2024-06-21 20:16:06,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:16:06,806 INFO L124 PetriNetUnfolderBase]: 112/238 cut-off events. [2024-06-21 20:16:06,806 INFO L125 PetriNetUnfolderBase]: For 1220/1220 co-relation queries the response was YES. [2024-06-21 20:16:06,807 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1019 conditions, 238 events. 112/238 cut-off events. For 1220/1220 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 924 event pairs, 22 based on Foata normal form. 1/238 useless extension candidates. Maximal degree in co-relation 989. Up to 163 conditions per place. [2024-06-21 20:16:06,809 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 40 selfloop transitions, 21 changer transitions 0/66 dead transitions. [2024-06-21 20:16:06,809 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 66 transitions, 582 flow [2024-06-21 20:16:06,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:16:06,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:16:06,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-21 20:16:06,810 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5960591133004927 [2024-06-21 20:16:06,811 INFO L175 Difference]: Start difference. First operand has 63 places, 50 transitions, 380 flow. Second operand 7 states and 121 transitions. [2024-06-21 20:16:06,811 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 66 transitions, 582 flow [2024-06-21 20:16:06,814 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 66 transitions, 548 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-21 20:16:06,817 INFO L231 Difference]: Finished difference. Result has 67 places, 54 transitions, 429 flow [2024-06-21 20:16:06,817 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=350, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=429, PETRI_PLACES=67, PETRI_TRANSITIONS=54} [2024-06-21 20:16:06,818 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 39 predicate places. [2024-06-21 20:16:06,818 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 54 transitions, 429 flow [2024-06-21 20:16:06,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:16:06,819 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:16:06,819 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:16:06,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-21 20:16:06,819 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:16:06,820 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:16:06,820 INFO L85 PathProgramCache]: Analyzing trace with hash 967111523, now seen corresponding path program 3 times [2024-06-21 20:16:06,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:16:06,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558075457] [2024-06-21 20:16:06,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:16:06,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:16:06,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:16:06,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:16:06,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:16:06,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558075457] [2024-06-21 20:16:06,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558075457] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:16:06,938 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:16:06,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:16:06,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336391784] [2024-06-21 20:16:06,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:16:06,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:16:06,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:16:06,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:16:06,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:16:06,973 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 29 [2024-06-21 20:16:06,974 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 54 transitions, 429 flow. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:16:06,974 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:16:06,974 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 29 [2024-06-21 20:16:06,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:16:07,083 INFO L124 PetriNetUnfolderBase]: 110/235 cut-off events. [2024-06-21 20:16:07,084 INFO L125 PetriNetUnfolderBase]: For 1333/1333 co-relation queries the response was YES. [2024-06-21 20:16:07,085 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1042 conditions, 235 events. 110/235 cut-off events. For 1333/1333 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 918 event pairs, 22 based on Foata normal form. 1/235 useless extension candidates. Maximal degree in co-relation 1010. Up to 161 conditions per place. [2024-06-21 20:16:07,086 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 40 selfloop transitions, 22 changer transitions 0/67 dead transitions. [2024-06-21 20:16:07,086 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 67 transitions, 583 flow [2024-06-21 20:16:07,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:16:07,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:16:07,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 146 transitions. [2024-06-21 20:16:07,088 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5593869731800766 [2024-06-21 20:16:07,088 INFO L175 Difference]: Start difference. First operand has 67 places, 54 transitions, 429 flow. Second operand 9 states and 146 transitions. [2024-06-21 20:16:07,088 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 67 transitions, 583 flow [2024-06-21 20:16:07,091 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 67 transitions, 554 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-21 20:16:07,093 INFO L231 Difference]: Finished difference. Result has 73 places, 54 transitions, 449 flow [2024-06-21 20:16:07,093 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=400, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=449, PETRI_PLACES=73, PETRI_TRANSITIONS=54} [2024-06-21 20:16:07,094 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 45 predicate places. [2024-06-21 20:16:07,094 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 54 transitions, 449 flow [2024-06-21 20:16:07,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:16:07,095 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:16:07,095 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:16:07,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-21 20:16:07,095 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:16:07,096 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:16:07,096 INFO L85 PathProgramCache]: Analyzing trace with hash -698498681, now seen corresponding path program 4 times [2024-06-21 20:16:07,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:16:07,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246486889] [2024-06-21 20:16:07,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:16:07,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:16:07,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:16:07,210 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:16:07,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:16:07,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246486889] [2024-06-21 20:16:07,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246486889] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:16:07,211 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:16:07,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:16:07,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254159546] [2024-06-21 20:16:07,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:16:07,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:16:07,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:16:07,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:16:07,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:16:07,241 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 29 [2024-06-21 20:16:07,242 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 54 transitions, 449 flow. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:16:07,242 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:16:07,242 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 29 [2024-06-21 20:16:07,242 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:16:07,334 INFO L124 PetriNetUnfolderBase]: 118/252 cut-off events. [2024-06-21 20:16:07,335 INFO L125 PetriNetUnfolderBase]: For 1607/1607 co-relation queries the response was YES. [2024-06-21 20:16:07,336 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1165 conditions, 252 events. 118/252 cut-off events. For 1607/1607 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1011 event pairs, 22 based on Foata normal form. 1/252 useless extension candidates. Maximal degree in co-relation 1131. Up to 151 conditions per place. [2024-06-21 20:16:07,337 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 38 selfloop transitions, 32 changer transitions 0/75 dead transitions. [2024-06-21 20:16:07,337 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 75 transitions, 713 flow [2024-06-21 20:16:07,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:16:07,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:16:07,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-21 20:16:07,339 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5991379310344828 [2024-06-21 20:16:07,339 INFO L175 Difference]: Start difference. First operand has 73 places, 54 transitions, 449 flow. Second operand 8 states and 139 transitions. [2024-06-21 20:16:07,339 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 75 transitions, 713 flow [2024-06-21 20:16:07,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 75 transitions, 664 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-06-21 20:16:07,345 INFO L231 Difference]: Finished difference. Result has 73 places, 58 transitions, 508 flow [2024-06-21 20:16:07,345 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=400, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=508, PETRI_PLACES=73, PETRI_TRANSITIONS=58} [2024-06-21 20:16:07,346 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 45 predicate places. [2024-06-21 20:16:07,346 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 58 transitions, 508 flow [2024-06-21 20:16:07,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:16:07,347 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:16:07,347 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:16:07,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-21 20:16:07,347 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:16:07,348 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:16:07,348 INFO L85 PathProgramCache]: Analyzing trace with hash -82724201, now seen corresponding path program 5 times [2024-06-21 20:16:07,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:16:07,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888551866] [2024-06-21 20:16:07,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:16:07,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:16:07,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:16:07,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:16:07,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:16:07,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888551866] [2024-06-21 20:16:07,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888551866] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:16:07,465 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:16:07,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:16:07,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59821892] [2024-06-21 20:16:07,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:16:07,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:16:07,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:16:07,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:16:07,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:16:07,493 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 29 [2024-06-21 20:16:07,493 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 58 transitions, 508 flow. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:16:07,493 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:16:07,493 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 29 [2024-06-21 20:16:07,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:16:07,587 INFO L124 PetriNetUnfolderBase]: 116/249 cut-off events. [2024-06-21 20:16:07,587 INFO L125 PetriNetUnfolderBase]: For 1773/1773 co-relation queries the response was YES. [2024-06-21 20:16:07,588 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1183 conditions, 249 events. 116/249 cut-off events. For 1773/1773 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 994 event pairs, 22 based on Foata normal form. 1/249 useless extension candidates. Maximal degree in co-relation 1148. Up to 149 conditions per place. [2024-06-21 20:16:07,590 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 37 selfloop transitions, 30 changer transitions 0/72 dead transitions. [2024-06-21 20:16:07,590 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 72 transitions, 702 flow [2024-06-21 20:16:07,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:16:07,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:16:07,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 110 transitions. [2024-06-21 20:16:07,591 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.632183908045977 [2024-06-21 20:16:07,591 INFO L175 Difference]: Start difference. First operand has 73 places, 58 transitions, 508 flow. Second operand 6 states and 110 transitions. [2024-06-21 20:16:07,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 72 transitions, 702 flow [2024-06-21 20:16:07,596 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 72 transitions, 623 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-21 20:16:07,597 INFO L231 Difference]: Finished difference. Result has 73 places, 58 transitions, 499 flow [2024-06-21 20:16:07,598 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=431, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=499, PETRI_PLACES=73, PETRI_TRANSITIONS=58} [2024-06-21 20:16:07,598 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 45 predicate places. [2024-06-21 20:16:07,599 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 58 transitions, 499 flow [2024-06-21 20:16:07,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:16:07,599 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:16:07,599 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:16:07,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-21 20:16:07,599 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:16:07,600 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:16:07,600 INFO L85 PathProgramCache]: Analyzing trace with hash -82516811, now seen corresponding path program 6 times [2024-06-21 20:16:07,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:16:07,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811460527] [2024-06-21 20:16:07,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:16:07,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:16:07,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:16:07,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:16:07,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:16:07,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811460527] [2024-06-21 20:16:07,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811460527] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:16:07,714 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:16:07,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:16:07,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133563440] [2024-06-21 20:16:07,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:16:07,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:16:07,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:16:07,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:16:07,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:16:07,751 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 29 [2024-06-21 20:16:07,751 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 58 transitions, 499 flow. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:16:07,751 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:16:07,751 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 29 [2024-06-21 20:16:07,751 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:16:07,831 INFO L124 PetriNetUnfolderBase]: 114/246 cut-off events. [2024-06-21 20:16:07,831 INFO L125 PetriNetUnfolderBase]: For 1649/1649 co-relation queries the response was YES. [2024-06-21 20:16:07,832 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1147 conditions, 246 events. 114/246 cut-off events. For 1649/1649 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 977 event pairs, 22 based on Foata normal form. 1/246 useless extension candidates. Maximal degree in co-relation 1112. Up to 171 conditions per place. [2024-06-21 20:16:07,834 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 48 selfloop transitions, 17 changer transitions 0/70 dead transitions. [2024-06-21 20:16:07,834 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 70 transitions, 659 flow [2024-06-21 20:16:07,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 20:16:07,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 20:16:07,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 95 transitions. [2024-06-21 20:16:07,835 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6551724137931034 [2024-06-21 20:16:07,835 INFO L175 Difference]: Start difference. First operand has 73 places, 58 transitions, 499 flow. Second operand 5 states and 95 transitions. [2024-06-21 20:16:07,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 70 transitions, 659 flow [2024-06-21 20:16:07,840 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 70 transitions, 592 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-21 20:16:07,844 INFO L231 Difference]: Finished difference. Result has 72 places, 58 transitions, 477 flow [2024-06-21 20:16:07,844 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=432, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=477, PETRI_PLACES=72, PETRI_TRANSITIONS=58} [2024-06-21 20:16:07,844 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 44 predicate places. [2024-06-21 20:16:07,845 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 58 transitions, 477 flow [2024-06-21 20:16:07,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:16:07,845 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:16:07,845 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:16:07,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-21 20:16:07,846 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:16:07,846 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:16:07,846 INFO L85 PathProgramCache]: Analyzing trace with hash 1687652730, now seen corresponding path program 1 times [2024-06-21 20:16:07,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:16:07,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509991887] [2024-06-21 20:16:07,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:16:07,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:16:07,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:16:07,959 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:16:07,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:16:07,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509991887] [2024-06-21 20:16:07,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509991887] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:16:07,960 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:16:07,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:16:07,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799911660] [2024-06-21 20:16:07,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:16:07,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:16:07,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:16:07,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:16:07,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:16:07,994 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 29 [2024-06-21 20:16:07,995 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 58 transitions, 477 flow. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:16:07,995 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:16:07,995 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 29 [2024-06-21 20:16:07,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:16:08,078 INFO L124 PetriNetUnfolderBase]: 118/254 cut-off events. [2024-06-21 20:16:08,078 INFO L125 PetriNetUnfolderBase]: For 1702/1702 co-relation queries the response was YES. [2024-06-21 20:16:08,079 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1150 conditions, 254 events. 118/254 cut-off events. For 1702/1702 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1018 event pairs, 8 based on Foata normal form. 2/255 useless extension candidates. Maximal degree in co-relation 1115. Up to 140 conditions per place. [2024-06-21 20:16:08,081 INFO L140 encePairwiseOnDemand]: 22/29 looper letters, 52 selfloop transitions, 19 changer transitions 0/76 dead transitions. [2024-06-21 20:16:08,081 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 76 transitions, 689 flow [2024-06-21 20:16:08,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:16:08,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:16:08,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-21 20:16:08,082 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5911330049261084 [2024-06-21 20:16:08,082 INFO L175 Difference]: Start difference. First operand has 72 places, 58 transitions, 477 flow. Second operand 7 states and 120 transitions. [2024-06-21 20:16:08,082 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 76 transitions, 689 flow [2024-06-21 20:16:08,087 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 76 transitions, 640 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-21 20:16:08,088 INFO L231 Difference]: Finished difference. Result has 74 places, 59 transitions, 474 flow [2024-06-21 20:16:08,089 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=428, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=474, PETRI_PLACES=74, PETRI_TRANSITIONS=59} [2024-06-21 20:16:08,089 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 46 predicate places. [2024-06-21 20:16:08,089 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 59 transitions, 474 flow [2024-06-21 20:16:08,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:16:08,090 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:16:08,090 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:16:08,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-21 20:16:08,090 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:16:08,091 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:16:08,091 INFO L85 PathProgramCache]: Analyzing trace with hash 1687713180, now seen corresponding path program 2 times [2024-06-21 20:16:08,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:16:08,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591001212] [2024-06-21 20:16:08,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:16:08,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:16:08,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:16:08,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:16:08,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:16:08,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591001212] [2024-06-21 20:16:08,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591001212] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:16:08,219 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:16:08,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:16:08,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978051452] [2024-06-21 20:16:08,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:16:08,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:16:08,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:16:08,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:16:08,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:16:08,246 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 29 [2024-06-21 20:16:08,247 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 59 transitions, 474 flow. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:16:08,247 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:16:08,247 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 29 [2024-06-21 20:16:08,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:16:08,335 INFO L124 PetriNetUnfolderBase]: 122/262 cut-off events. [2024-06-21 20:16:08,336 INFO L125 PetriNetUnfolderBase]: For 1860/1860 co-relation queries the response was YES. [2024-06-21 20:16:08,337 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1188 conditions, 262 events. 122/262 cut-off events. For 1860/1860 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1071 event pairs, 19 based on Foata normal form. 2/263 useless extension candidates. Maximal degree in co-relation 1153. Up to 181 conditions per place. [2024-06-21 20:16:08,338 INFO L140 encePairwiseOnDemand]: 22/29 looper letters, 52 selfloop transitions, 18 changer transitions 0/75 dead transitions. [2024-06-21 20:16:08,338 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 75 transitions, 656 flow [2024-06-21 20:16:08,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:16:08,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:16:08,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-21 20:16:08,340 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5911330049261084 [2024-06-21 20:16:08,340 INFO L175 Difference]: Start difference. First operand has 74 places, 59 transitions, 474 flow. Second operand 7 states and 120 transitions. [2024-06-21 20:16:08,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 75 transitions, 656 flow [2024-06-21 20:16:08,346 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 75 transitions, 619 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-21 20:16:08,347 INFO L231 Difference]: Finished difference. Result has 77 places, 60 transitions, 485 flow [2024-06-21 20:16:08,347 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=440, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=485, PETRI_PLACES=77, PETRI_TRANSITIONS=60} [2024-06-21 20:16:08,348 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 49 predicate places. [2024-06-21 20:16:08,348 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 60 transitions, 485 flow [2024-06-21 20:16:08,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:16:08,348 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:16:08,348 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:16:08,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-21 20:16:08,349 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:16:08,349 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:16:08,349 INFO L85 PathProgramCache]: Analyzing trace with hash -84491170, now seen corresponding path program 3 times [2024-06-21 20:16:08,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:16:08,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467248505] [2024-06-21 20:16:08,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:16:08,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:16:08,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:16:08,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:16:08,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:16:08,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467248505] [2024-06-21 20:16:08,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467248505] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:16:08,471 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:16:08,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:16:08,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808398638] [2024-06-21 20:16:08,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:16:08,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:16:08,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:16:08,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:16:08,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:16:08,504 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 29 [2024-06-21 20:16:08,505 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 60 transitions, 485 flow. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:16:08,505 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:16:08,505 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 29 [2024-06-21 20:16:08,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:16:08,592 INFO L124 PetriNetUnfolderBase]: 126/270 cut-off events. [2024-06-21 20:16:08,593 INFO L125 PetriNetUnfolderBase]: For 2039/2039 co-relation queries the response was YES. [2024-06-21 20:16:08,594 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1220 conditions, 270 events. 126/270 cut-off events. For 2039/2039 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1110 event pairs, 19 based on Foata normal form. 2/271 useless extension candidates. Maximal degree in co-relation 1184. Up to 204 conditions per place. [2024-06-21 20:16:08,595 INFO L140 encePairwiseOnDemand]: 22/29 looper letters, 55 selfloop transitions, 13 changer transitions 0/73 dead transitions. [2024-06-21 20:16:08,595 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 73 transitions, 654 flow [2024-06-21 20:16:08,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:16:08,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:16:08,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-21 20:16:08,597 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-21 20:16:08,597 INFO L175 Difference]: Start difference. First operand has 77 places, 60 transitions, 485 flow. Second operand 7 states and 116 transitions. [2024-06-21 20:16:08,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 73 transitions, 654 flow [2024-06-21 20:16:08,602 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 73 transitions, 618 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-06-21 20:16:08,604 INFO L231 Difference]: Finished difference. Result has 79 places, 61 transitions, 486 flow [2024-06-21 20:16:08,604 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=449, PETRI_DIFFERENCE_MINUEND_PLACES=72, 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=7, PETRI_FLOW=486, PETRI_PLACES=79, PETRI_TRANSITIONS=61} [2024-06-21 20:16:08,604 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 51 predicate places. [2024-06-21 20:16:08,604 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 61 transitions, 486 flow [2024-06-21 20:16:08,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:16:08,605 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:16:08,605 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:16:08,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-21 20:16:08,605 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:16:08,605 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:16:08,606 INFO L85 PathProgramCache]: Analyzing trace with hash 1805985558, now seen corresponding path program 1 times [2024-06-21 20:16:08,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:16:08,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816350285] [2024-06-21 20:16:08,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:16:08,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:16:08,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:16:08,726 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:16:08,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:16:08,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816350285] [2024-06-21 20:16:08,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816350285] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:16:08,727 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:16:08,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:16:08,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078607370] [2024-06-21 20:16:08,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:16:08,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:16:08,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:16:08,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:16:08,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:16:08,774 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 29 [2024-06-21 20:16:08,774 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 61 transitions, 486 flow. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:16:08,774 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:16:08,775 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 29 [2024-06-21 20:16:08,775 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:16:08,841 INFO L124 PetriNetUnfolderBase]: 130/278 cut-off events. [2024-06-21 20:16:08,842 INFO L125 PetriNetUnfolderBase]: For 2232/2232 co-relation queries the response was YES. [2024-06-21 20:16:08,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1250 conditions, 278 events. 130/278 cut-off events. For 2232/2232 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1151 event pairs, 20 based on Foata normal form. 2/279 useless extension candidates. Maximal degree in co-relation 1213. Up to 203 conditions per place. [2024-06-21 20:16:08,844 INFO L140 encePairwiseOnDemand]: 22/29 looper letters, 52 selfloop transitions, 17 changer transitions 0/74 dead transitions. [2024-06-21 20:16:08,844 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 74 transitions, 658 flow [2024-06-21 20:16:08,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:16:08,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:16:08,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-21 20:16:08,845 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5812807881773399 [2024-06-21 20:16:08,846 INFO L175 Difference]: Start difference. First operand has 79 places, 61 transitions, 486 flow. Second operand 7 states and 118 transitions. [2024-06-21 20:16:08,846 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 74 transitions, 658 flow [2024-06-21 20:16:08,852 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 74 transitions, 632 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-06-21 20:16:08,853 INFO L231 Difference]: Finished difference. Result has 81 places, 62 transitions, 506 flow [2024-06-21 20:16:08,855 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=460, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=506, PETRI_PLACES=81, PETRI_TRANSITIONS=62} [2024-06-21 20:16:08,855 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 53 predicate places. [2024-06-21 20:16:08,856 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 62 transitions, 506 flow [2024-06-21 20:16:08,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:16:08,856 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:16:08,857 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:16:08,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-21 20:16:08,857 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:16:08,857 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:16:08,858 INFO L85 PathProgramCache]: Analyzing trace with hash -178799942, now seen corresponding path program 4 times [2024-06-21 20:16:08,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:16:08,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555019619] [2024-06-21 20:16:08,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:16:08,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:16:08,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:16:08,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:16:08,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:16:08,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555019619] [2024-06-21 20:16:08,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555019619] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:16:08,984 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:16:08,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:16:08,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021293188] [2024-06-21 20:16:08,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:16:08,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:16:08,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:16:08,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:16:08,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:16:09,014 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 29 [2024-06-21 20:16:09,014 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 62 transitions, 506 flow. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:16:09,014 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:16:09,014 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 29 [2024-06-21 20:16:09,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:16:09,108 INFO L124 PetriNetUnfolderBase]: 127/273 cut-off events. [2024-06-21 20:16:09,108 INFO L125 PetriNetUnfolderBase]: For 2204/2204 co-relation queries the response was YES. [2024-06-21 20:16:09,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1231 conditions, 273 events. 127/273 cut-off events. For 2204/2204 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1130 event pairs, 7 based on Foata normal form. 2/274 useless extension candidates. Maximal degree in co-relation 1193. Up to 171 conditions per place. [2024-06-21 20:16:09,111 INFO L140 encePairwiseOnDemand]: 22/29 looper letters, 53 selfloop transitions, 18 changer transitions 0/76 dead transitions. [2024-06-21 20:16:09,111 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 76 transitions, 682 flow [2024-06-21 20:16:09,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:16:09,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:16:09,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 106 transitions. [2024-06-21 20:16:09,112 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6091954022988506 [2024-06-21 20:16:09,112 INFO L175 Difference]: Start difference. First operand has 81 places, 62 transitions, 506 flow. Second operand 6 states and 106 transitions. [2024-06-21 20:16:09,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 76 transitions, 682 flow [2024-06-21 20:16:09,118 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 76 transitions, 646 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-21 20:16:09,119 INFO L231 Difference]: Finished difference. Result has 82 places, 62 transitions, 514 flow [2024-06-21 20:16:09,119 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=470, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=514, PETRI_PLACES=82, PETRI_TRANSITIONS=62} [2024-06-21 20:16:09,119 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 54 predicate places. [2024-06-21 20:16:09,120 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 62 transitions, 514 flow [2024-06-21 20:16:09,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:16:09,120 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:16:09,120 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:16:09,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-21 20:16:09,121 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:16:09,121 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:16:09,121 INFO L85 PathProgramCache]: Analyzing trace with hash -178615244, now seen corresponding path program 2 times [2024-06-21 20:16:09,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:16:09,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778547690] [2024-06-21 20:16:09,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:16:09,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:16:09,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:16:09,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:16:09,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:16:09,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778547690] [2024-06-21 20:16:09,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778547690] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:16:09,224 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:16:09,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:16:09,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227771431] [2024-06-21 20:16:09,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:16:09,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:16:09,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:16:09,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:16:09,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:16:09,257 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 29 [2024-06-21 20:16:09,257 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 62 transitions, 514 flow. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:16:09,258 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:16:09,258 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 29 [2024-06-21 20:16:09,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:16:09,321 INFO L124 PetriNetUnfolderBase]: 131/281 cut-off events. [2024-06-21 20:16:09,322 INFO L125 PetriNetUnfolderBase]: For 2540/2540 co-relation queries the response was YES. [2024-06-21 20:16:09,323 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1285 conditions, 281 events. 131/281 cut-off events. For 2540/2540 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1179 event pairs, 19 based on Foata normal form. 2/282 useless extension candidates. Maximal degree in co-relation 1246. Up to 200 conditions per place. [2024-06-21 20:16:09,324 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 51 selfloop transitions, 18 changer transitions 0/74 dead transitions. [2024-06-21 20:16:09,324 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 74 transitions, 686 flow [2024-06-21 20:16:09,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:16:09,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:16:09,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 104 transitions. [2024-06-21 20:16:09,325 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5977011494252874 [2024-06-21 20:16:09,325 INFO L175 Difference]: Start difference. First operand has 82 places, 62 transitions, 514 flow. Second operand 6 states and 104 transitions. [2024-06-21 20:16:09,326 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 74 transitions, 686 flow [2024-06-21 20:16:09,333 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 74 transitions, 640 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-21 20:16:09,334 INFO L231 Difference]: Finished difference. Result has 82 places, 63 transitions, 520 flow [2024-06-21 20:16:09,334 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=468, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=520, PETRI_PLACES=82, PETRI_TRANSITIONS=63} [2024-06-21 20:16:09,334 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 54 predicate places. [2024-06-21 20:16:09,335 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 63 transitions, 520 flow [2024-06-21 20:16:09,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:16:09,335 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:16:09,335 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:16:09,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-21 20:16:09,336 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:16:09,336 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:16:09,336 INFO L85 PathProgramCache]: Analyzing trace with hash 57560116, now seen corresponding path program 3 times [2024-06-21 20:16:09,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:16:09,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074467291] [2024-06-21 20:16:09,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:16:09,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:16:09,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:16:09,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:16:09,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:16:09,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074467291] [2024-06-21 20:16:09,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074467291] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:16:09,446 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:16:09,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:16:09,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856095303] [2024-06-21 20:16:09,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:16:09,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:16:09,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:16:09,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:16:09,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:16:09,479 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 29 [2024-06-21 20:16:09,480 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 63 transitions, 520 flow. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:16:09,480 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:16:09,480 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 29 [2024-06-21 20:16:09,480 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:16:09,573 INFO L124 PetriNetUnfolderBase]: 135/289 cut-off events. [2024-06-21 20:16:09,573 INFO L125 PetriNetUnfolderBase]: For 2294/2294 co-relation queries the response was YES. [2024-06-21 20:16:09,575 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1306 conditions, 289 events. 135/289 cut-off events. For 2294/2294 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1225 event pairs, 21 based on Foata normal form. 2/290 useless extension candidates. Maximal degree in co-relation 1267. Up to 220 conditions per place. [2024-06-21 20:16:09,576 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 56 selfloop transitions, 13 changer transitions 0/74 dead transitions. [2024-06-21 20:16:09,576 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 74 transitions, 692 flow [2024-06-21 20:16:09,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 20:16:09,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 20:16:09,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 90 transitions. [2024-06-21 20:16:09,577 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6206896551724138 [2024-06-21 20:16:09,578 INFO L175 Difference]: Start difference. First operand has 82 places, 63 transitions, 520 flow. Second operand 5 states and 90 transitions. [2024-06-21 20:16:09,578 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 74 transitions, 692 flow [2024-06-21 20:16:09,586 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 74 transitions, 650 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-21 20:16:09,587 INFO L231 Difference]: Finished difference. Result has 83 places, 64 transitions, 520 flow [2024-06-21 20:16:09,587 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=480, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=520, PETRI_PLACES=83, PETRI_TRANSITIONS=64} [2024-06-21 20:16:09,588 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 55 predicate places. [2024-06-21 20:16:09,588 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 64 transitions, 520 flow [2024-06-21 20:16:09,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:16:09,588 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:16:09,588 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:16:09,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-21 20:16:09,589 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:16:09,590 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:16:09,590 INFO L85 PathProgramCache]: Analyzing trace with hash 57856786, now seen corresponding path program 4 times [2024-06-21 20:16:09,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:16:09,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23414247] [2024-06-21 20:16:09,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:16:09,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:16:09,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:16:09,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:16:09,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:16:09,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23414247] [2024-06-21 20:16:09,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23414247] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:16:09,738 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:16:09,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:16:09,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190013588] [2024-06-21 20:16:09,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:16:09,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:16:09,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:16:09,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:16:09,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:16:09,784 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 29 [2024-06-21 20:16:09,785 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 64 transitions, 520 flow. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:16:09,785 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:16:09,785 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 29 [2024-06-21 20:16:09,785 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:16:09,881 INFO L124 PetriNetUnfolderBase]: 132/284 cut-off events. [2024-06-21 20:16:09,882 INFO L125 PetriNetUnfolderBase]: For 1963/1963 co-relation queries the response was YES. [2024-06-21 20:16:09,883 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1239 conditions, 284 events. 132/284 cut-off events. For 1963/1963 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1196 event pairs, 18 based on Foata normal form. 2/285 useless extension candidates. Maximal degree in co-relation 1199. Up to 201 conditions per place. [2024-06-21 20:16:09,884 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 56 selfloop transitions, 15 changer transitions 0/76 dead transitions. [2024-06-21 20:16:09,884 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 76 transitions, 690 flow [2024-06-21 20:16:09,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:16:09,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:16:09,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 104 transitions. [2024-06-21 20:16:09,885 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5977011494252874 [2024-06-21 20:16:09,885 INFO L175 Difference]: Start difference. First operand has 83 places, 64 transitions, 520 flow. Second operand 6 states and 104 transitions. [2024-06-21 20:16:09,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 76 transitions, 690 flow [2024-06-21 20:16:09,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 76 transitions, 660 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-21 20:16:09,894 INFO L231 Difference]: Finished difference. Result has 86 places, 64 transitions, 524 flow [2024-06-21 20:16:09,894 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=490, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=524, PETRI_PLACES=86, PETRI_TRANSITIONS=64} [2024-06-21 20:16:09,895 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 58 predicate places. [2024-06-21 20:16:09,896 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 64 transitions, 524 flow [2024-06-21 20:16:09,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:16:09,896 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:16:09,896 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:16:09,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-21 20:16:09,897 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:16:09,897 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:16:09,897 INFO L85 PathProgramCache]: Analyzing trace with hash -1986850406, now seen corresponding path program 1 times [2024-06-21 20:16:09,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:16:09,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867595897] [2024-06-21 20:16:09,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:16:09,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:16:09,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:16:10,016 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:16:10,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:16:10,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867595897] [2024-06-21 20:16:10,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867595897] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:16:10,017 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:16:10,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:16:10,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591875861] [2024-06-21 20:16:10,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:16:10,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:16:10,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:16:10,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:16:10,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:16:10,054 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 29 [2024-06-21 20:16:10,055 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 64 transitions, 524 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 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) [2024-06-21 20:16:10,055 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:16:10,055 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 29 [2024-06-21 20:16:10,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:16:10,149 INFO L124 PetriNetUnfolderBase]: 155/341 cut-off events. [2024-06-21 20:16:10,149 INFO L125 PetriNetUnfolderBase]: For 3780/3780 co-relation queries the response was YES. [2024-06-21 20:16:10,151 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1492 conditions, 341 events. 155/341 cut-off events. For 3780/3780 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1532 event pairs, 29 based on Foata normal form. 6/346 useless extension candidates. Maximal degree in co-relation 1451. Up to 118 conditions per place. [2024-06-21 20:16:10,152 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 41 selfloop transitions, 29 changer transitions 12/87 dead transitions. [2024-06-21 20:16:10,152 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 87 transitions, 786 flow [2024-06-21 20:16:10,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:16:10,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:16:10,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-21 20:16:10,153 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.603448275862069 [2024-06-21 20:16:10,153 INFO L175 Difference]: Start difference. First operand has 86 places, 64 transitions, 524 flow. Second operand 8 states and 140 transitions. [2024-06-21 20:16:10,154 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 87 transitions, 786 flow [2024-06-21 20:16:10,162 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 87 transitions, 736 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-21 20:16:10,163 INFO L231 Difference]: Finished difference. Result has 89 places, 61 transitions, 510 flow [2024-06-21 20:16:10,163 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=474, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=510, PETRI_PLACES=89, PETRI_TRANSITIONS=61} [2024-06-21 20:16:10,164 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 61 predicate places. [2024-06-21 20:16:10,164 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 61 transitions, 510 flow [2024-06-21 20:16:10,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 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) [2024-06-21 20:16:10,164 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:16:10,164 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:16:10,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-21 20:16:10,165 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:16:10,165 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:16:10,165 INFO L85 PathProgramCache]: Analyzing trace with hash -1984972736, now seen corresponding path program 2 times [2024-06-21 20:16:10,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:16:10,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593530228] [2024-06-21 20:16:10,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:16:10,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:16:10,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:16:10,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:16:10,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:16:10,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593530228] [2024-06-21 20:16:10,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593530228] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:16:10,274 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:16:10,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:16:10,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846833635] [2024-06-21 20:16:10,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:16:10,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:16:10,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:16:10,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:16:10,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:16:10,321 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 29 [2024-06-21 20:16:10,322 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 61 transitions, 510 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 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) [2024-06-21 20:16:10,322 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:16:10,322 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 29 [2024-06-21 20:16:10,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:16:10,406 INFO L124 PetriNetUnfolderBase]: 143/319 cut-off events. [2024-06-21 20:16:10,407 INFO L125 PetriNetUnfolderBase]: For 4487/4487 co-relation queries the response was YES. [2024-06-21 20:16:10,408 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1417 conditions, 319 events. 143/319 cut-off events. For 4487/4487 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1430 event pairs, 35 based on Foata normal form. 8/326 useless extension candidates. Maximal degree in co-relation 1375. Up to 178 conditions per place. [2024-06-21 20:16:10,409 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 35 selfloop transitions, 28 changer transitions 9/77 dead transitions. [2024-06-21 20:16:10,409 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 77 transitions, 700 flow [2024-06-21 20:16:10,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:16:10,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:16:10,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-21 20:16:10,410 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5818965517241379 [2024-06-21 20:16:10,411 INFO L175 Difference]: Start difference. First operand has 89 places, 61 transitions, 510 flow. Second operand 8 states and 135 transitions. [2024-06-21 20:16:10,411 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 77 transitions, 700 flow [2024-06-21 20:16:10,440 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 77 transitions, 636 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-21 20:16:10,441 INFO L231 Difference]: Finished difference. Result has 86 places, 58 transitions, 487 flow [2024-06-21 20:16:10,442 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=448, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=487, PETRI_PLACES=86, PETRI_TRANSITIONS=58} [2024-06-21 20:16:10,442 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 58 predicate places. [2024-06-21 20:16:10,442 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 58 transitions, 487 flow [2024-06-21 20:16:10,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 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) [2024-06-21 20:16:10,443 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:16:10,443 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:16:10,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-21 20:16:10,443 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:16:10,444 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:16:10,444 INFO L85 PathProgramCache]: Analyzing trace with hash 866193436, now seen corresponding path program 3 times [2024-06-21 20:16:10,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:16:10,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816381283] [2024-06-21 20:16:10,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:16:10,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:16:10,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:16:10,545 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:16:10,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:16:10,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816381283] [2024-06-21 20:16:10,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816381283] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:16:10,545 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:16:10,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:16:10,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469556491] [2024-06-21 20:16:10,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:16:10,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:16:10,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:16:10,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:16:10,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:16:10,590 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 29 [2024-06-21 20:16:10,590 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 58 transitions, 487 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 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) [2024-06-21 20:16:10,590 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:16:10,590 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 29 [2024-06-21 20:16:10,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:16:10,658 INFO L124 PetriNetUnfolderBase]: 134/302 cut-off events. [2024-06-21 20:16:10,659 INFO L125 PetriNetUnfolderBase]: For 3364/3364 co-relation queries the response was YES. [2024-06-21 20:16:10,660 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1324 conditions, 302 events. 134/302 cut-off events. For 3364/3364 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1320 event pairs, 29 based on Foata normal form. 6/307 useless extension candidates. Maximal degree in co-relation 1284. Up to 168 conditions per place. [2024-06-21 20:16:10,661 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 30 selfloop transitions, 25 changer transitions 14/74 dead transitions. [2024-06-21 20:16:10,661 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 74 transitions, 665 flow [2024-06-21 20:16:10,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:16:10,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:16:10,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-21 20:16:10,662 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5732758620689655 [2024-06-21 20:16:10,662 INFO L175 Difference]: Start difference. First operand has 86 places, 58 transitions, 487 flow. Second operand 8 states and 133 transitions. [2024-06-21 20:16:10,662 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 74 transitions, 665 flow [2024-06-21 20:16:10,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 74 transitions, 605 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-21 20:16:10,670 INFO L231 Difference]: Finished difference. Result has 84 places, 54 transitions, 441 flow [2024-06-21 20:16:10,671 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=427, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=441, PETRI_PLACES=84, PETRI_TRANSITIONS=54} [2024-06-21 20:16:10,671 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 56 predicate places. [2024-06-21 20:16:10,671 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 54 transitions, 441 flow [2024-06-21 20:16:10,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 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) [2024-06-21 20:16:10,671 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:16:10,672 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:16:10,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-21 20:16:10,672 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:16:10,672 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:16:10,672 INFO L85 PathProgramCache]: Analyzing trace with hash -762257502, now seen corresponding path program 4 times [2024-06-21 20:16:10,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:16:10,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241202975] [2024-06-21 20:16:10,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:16:10,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:16:10,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:16:10,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:16:10,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:16:10,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241202975] [2024-06-21 20:16:10,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241202975] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:16:10,789 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:16:10,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:16:10,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157012469] [2024-06-21 20:16:10,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:16:10,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:16:10,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:16:10,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:16:10,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:16:10,858 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 29 [2024-06-21 20:16:10,858 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 54 transitions, 441 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 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) [2024-06-21 20:16:10,858 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:16:10,858 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 29 [2024-06-21 20:16:10,859 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:16:10,967 INFO L124 PetriNetUnfolderBase]: 127/279 cut-off events. [2024-06-21 20:16:10,967 INFO L125 PetriNetUnfolderBase]: For 3291/3291 co-relation queries the response was YES. [2024-06-21 20:16:10,968 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1212 conditions, 279 events. 127/279 cut-off events. For 3291/3291 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1208 event pairs, 33 based on Foata normal form. 8/286 useless extension candidates. Maximal degree in co-relation 1173. Up to 176 conditions per place. [2024-06-21 20:16:10,969 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 37 selfloop transitions, 18 changer transitions 9/69 dead transitions. [2024-06-21 20:16:10,969 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 69 transitions, 609 flow [2024-06-21 20:16:10,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:16:10,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:16:10,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 158 transitions. [2024-06-21 20:16:10,970 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5448275862068965 [2024-06-21 20:16:10,971 INFO L175 Difference]: Start difference. First operand has 84 places, 54 transitions, 441 flow. Second operand 10 states and 158 transitions. [2024-06-21 20:16:10,971 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 69 transitions, 609 flow [2024-06-21 20:16:10,976 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 69 transitions, 549 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-21 20:16:10,977 INFO L231 Difference]: Finished difference. Result has 81 places, 51 transitions, 396 flow [2024-06-21 20:16:10,978 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=381, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=396, PETRI_PLACES=81, PETRI_TRANSITIONS=51} [2024-06-21 20:16:10,978 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 53 predicate places. [2024-06-21 20:16:10,978 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 51 transitions, 396 flow [2024-06-21 20:16:10,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 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) [2024-06-21 20:16:10,979 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:16:10,979 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:16:10,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-21 20:16:10,979 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:16:10,980 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:16:10,980 INFO L85 PathProgramCache]: Analyzing trace with hash 1681467076, now seen corresponding path program 1 times [2024-06-21 20:16:10,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:16:10,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609975028] [2024-06-21 20:16:10,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:16:10,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:16:10,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:16:11,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:16:11,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:16:11,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609975028] [2024-06-21 20:16:11,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609975028] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:16:11,092 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:16:11,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:16:11,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552754400] [2024-06-21 20:16:11,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:16:11,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:16:11,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:16:11,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:16:11,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:16:11,154 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 29 [2024-06-21 20:16:11,155 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 51 transitions, 396 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 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) [2024-06-21 20:16:11,155 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:16:11,155 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 29 [2024-06-21 20:16:11,155 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:16:11,254 INFO L124 PetriNetUnfolderBase]: 140/314 cut-off events. [2024-06-21 20:16:11,254 INFO L125 PetriNetUnfolderBase]: For 3189/3189 co-relation queries the response was YES. [2024-06-21 20:16:11,255 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1336 conditions, 314 events. 140/314 cut-off events. For 3189/3189 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1443 event pairs, 43 based on Foata normal form. 6/319 useless extension candidates. Maximal degree in co-relation 1299. Up to 162 conditions per place. [2024-06-21 20:16:11,257 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 41 selfloop transitions, 16 changer transitions 8/70 dead transitions. [2024-06-21 20:16:11,257 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 70 transitions, 606 flow [2024-06-21 20:16:11,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:16:11,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:16:11,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 160 transitions. [2024-06-21 20:16:11,258 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5517241379310345 [2024-06-21 20:16:11,258 INFO L175 Difference]: Start difference. First operand has 81 places, 51 transitions, 396 flow. Second operand 10 states and 160 transitions. [2024-06-21 20:16:11,258 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 70 transitions, 606 flow [2024-06-21 20:16:11,263 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 70 transitions, 562 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-21 20:16:11,264 INFO L231 Difference]: Finished difference. Result has 80 places, 48 transitions, 363 flow [2024-06-21 20:16:11,264 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=354, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=363, PETRI_PLACES=80, PETRI_TRANSITIONS=48} [2024-06-21 20:16:11,264 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 52 predicate places. [2024-06-21 20:16:11,265 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 48 transitions, 363 flow [2024-06-21 20:16:11,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 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) [2024-06-21 20:16:11,265 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:16:11,265 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:16:11,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-21 20:16:11,265 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:16:11,266 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:16:11,266 INFO L85 PathProgramCache]: Analyzing trace with hash 1675895446, now seen corresponding path program 2 times [2024-06-21 20:16:11,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:16:11,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553610402] [2024-06-21 20:16:11,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:16:11,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:16:11,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:16:11,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:16:11,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:16:11,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553610402] [2024-06-21 20:16:11,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553610402] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:16:11,390 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:16:11,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:16:11,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208702963] [2024-06-21 20:16:11,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:16:11,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:16:11,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:16:11,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:16:11,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:16:11,423 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 29 [2024-06-21 20:16:11,424 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 48 transitions, 363 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 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) [2024-06-21 20:16:11,424 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:16:11,424 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 29 [2024-06-21 20:16:11,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:16:11,497 INFO L124 PetriNetUnfolderBase]: 115/257 cut-off events. [2024-06-21 20:16:11,497 INFO L125 PetriNetUnfolderBase]: For 2563/2563 co-relation queries the response was YES. [2024-06-21 20:16:11,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1064 conditions, 257 events. 115/257 cut-off events. For 2563/2563 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1088 event pairs, 35 based on Foata normal form. 8/264 useless extension candidates. Maximal degree in co-relation 1027. Up to 162 conditions per place. [2024-06-21 20:16:11,499 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 34 selfloop transitions, 13 changer transitions 9/61 dead transitions. [2024-06-21 20:16:11,499 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 61 transitions, 511 flow [2024-06-21 20:16:11,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:16:11,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:16:11,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-21 20:16:11,501 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5560344827586207 [2024-06-21 20:16:11,501 INFO L175 Difference]: Start difference. First operand has 80 places, 48 transitions, 363 flow. Second operand 8 states and 129 transitions. [2024-06-21 20:16:11,501 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 61 transitions, 511 flow [2024-06-21 20:16:11,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 61 transitions, 468 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-21 20:16:11,507 INFO L231 Difference]: Finished difference. Result has 75 places, 45 transitions, 321 flow [2024-06-21 20:16:11,507 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=320, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=321, PETRI_PLACES=75, PETRI_TRANSITIONS=45} [2024-06-21 20:16:11,507 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 47 predicate places. [2024-06-21 20:16:11,508 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 45 transitions, 321 flow [2024-06-21 20:16:11,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 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) [2024-06-21 20:16:11,508 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:16:11,508 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:16:11,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-21 20:16:11,509 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:16:11,509 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:16:11,509 INFO L85 PathProgramCache]: Analyzing trace with hash 1675741624, now seen corresponding path program 5 times [2024-06-21 20:16:11,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:16:11,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556721871] [2024-06-21 20:16:11,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:16:11,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:16:11,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:16:11,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:16:11,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:16:11,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556721871] [2024-06-21 20:16:11,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556721871] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:16:11,620 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:16:11,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:16:11,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314045827] [2024-06-21 20:16:11,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:16:11,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:16:11,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:16:11,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:16:11,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:16:11,683 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 29 [2024-06-21 20:16:11,684 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 45 transitions, 321 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 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) [2024-06-21 20:16:11,684 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:16:11,684 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 29 [2024-06-21 20:16:11,684 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:16:11,758 INFO L124 PetriNetUnfolderBase]: 106/242 cut-off events. [2024-06-21 20:16:11,758 INFO L125 PetriNetUnfolderBase]: For 2289/2289 co-relation queries the response was YES. [2024-06-21 20:16:11,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 982 conditions, 242 events. 106/242 cut-off events. For 2289/2289 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 982 event pairs, 29 based on Foata normal form. 6/247 useless extension candidates. Maximal degree in co-relation 946. Up to 152 conditions per place. [2024-06-21 20:16:11,760 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 28 selfloop transitions, 9 changer transitions 16/58 dead transitions. [2024-06-21 20:16:11,760 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 58 transitions, 459 flow [2024-06-21 20:16:11,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:16:11,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:16:11,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-21 20:16:11,761 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5474137931034483 [2024-06-21 20:16:11,761 INFO L175 Difference]: Start difference. First operand has 75 places, 45 transitions, 321 flow. Second operand 8 states and 127 transitions. [2024-06-21 20:16:11,762 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 58 transitions, 459 flow [2024-06-21 20:16:11,767 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 58 transitions, 419 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-21 20:16:11,768 INFO L231 Difference]: Finished difference. Result has 72 places, 40 transitions, 256 flow [2024-06-21 20:16:11,768 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=281, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=256, PETRI_PLACES=72, PETRI_TRANSITIONS=40} [2024-06-21 20:16:11,769 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 44 predicate places. [2024-06-21 20:16:11,769 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 40 transitions, 256 flow [2024-06-21 20:16:11,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 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) [2024-06-21 20:16:11,769 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:16:11,769 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:16:11,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-21 20:16:11,770 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:16:11,770 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:16:11,770 INFO L85 PathProgramCache]: Analyzing trace with hash 1527654248, now seen corresponding path program 3 times [2024-06-21 20:16:11,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:16:11,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322243255] [2024-06-21 20:16:11,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:16:11,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:16:11,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:16:11,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:16:11,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:16:11,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322243255] [2024-06-21 20:16:11,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322243255] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:16:11,904 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:16:11,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:16:11,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64622875] [2024-06-21 20:16:11,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:16:11,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:16:11,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:16:11,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:16:11,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:16:11,961 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 29 [2024-06-21 20:16:11,961 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 40 transitions, 256 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 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) [2024-06-21 20:16:11,961 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:16:11,962 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 29 [2024-06-21 20:16:11,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:16:12,032 INFO L124 PetriNetUnfolderBase]: 98/219 cut-off events. [2024-06-21 20:16:12,033 INFO L125 PetriNetUnfolderBase]: For 2335/2335 co-relation queries the response was YES. [2024-06-21 20:16:12,033 INFO L83 FinitePrefix]: Finished finitePrefix Result has 861 conditions, 219 events. 98/219 cut-off events. For 2335/2335 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 897 event pairs, 33 based on Foata normal form. 8/227 useless extension candidates. Maximal degree in co-relation 826. Up to 139 conditions per place. [2024-06-21 20:16:12,034 INFO L140 encePairwiseOnDemand]: 22/29 looper letters, 27 selfloop transitions, 10 changer transitions 6/48 dead transitions. [2024-06-21 20:16:12,034 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 48 transitions, 366 flow [2024-06-21 20:16:12,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:16:12,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:16:12,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 99 transitions. [2024-06-21 20:16:12,035 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5689655172413793 [2024-06-21 20:16:12,035 INFO L175 Difference]: Start difference. First operand has 72 places, 40 transitions, 256 flow. Second operand 6 states and 99 transitions. [2024-06-21 20:16:12,035 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 48 transitions, 366 flow [2024-06-21 20:16:12,039 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 48 transitions, 335 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-21 20:16:12,040 INFO L231 Difference]: Finished difference. Result has 62 places, 37 transitions, 228 flow [2024-06-21 20:16:12,040 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=225, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=228, PETRI_PLACES=62, PETRI_TRANSITIONS=37} [2024-06-21 20:16:12,040 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 34 predicate places. [2024-06-21 20:16:12,041 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 37 transitions, 228 flow [2024-06-21 20:16:12,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 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) [2024-06-21 20:16:12,041 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:16:12,041 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:16:12,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-21 20:16:12,041 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:16:12,042 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:16:12,042 INFO L85 PathProgramCache]: Analyzing trace with hash 1784364008, now seen corresponding path program 4 times [2024-06-21 20:16:12,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:16:12,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974043844] [2024-06-21 20:16:12,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:16:12,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:16:12,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:16:12,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:16:12,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:16:12,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974043844] [2024-06-21 20:16:12,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974043844] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:16:12,176 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:16:12,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:16:12,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673922426] [2024-06-21 20:16:12,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:16:12,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:16:12,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:16:12,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:16:12,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:16:12,224 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 29 [2024-06-21 20:16:12,225 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 37 transitions, 228 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 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) [2024-06-21 20:16:12,225 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:16:12,225 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 29 [2024-06-21 20:16:12,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:16:12,305 INFO L124 PetriNetUnfolderBase]: 89/206 cut-off events. [2024-06-21 20:16:12,305 INFO L125 PetriNetUnfolderBase]: For 1844/1844 co-relation queries the response was YES. [2024-06-21 20:16:12,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 785 conditions, 206 events. 89/206 cut-off events. For 1844/1844 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 819 event pairs, 29 based on Foata normal form. 6/212 useless extension candidates. Maximal degree in co-relation 754. Up to 129 conditions per place. [2024-06-21 20:16:12,306 INFO L140 encePairwiseOnDemand]: 22/29 looper letters, 26 selfloop transitions, 7 changer transitions 8/46 dead transitions. [2024-06-21 20:16:12,306 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 46 transitions, 332 flow [2024-06-21 20:16:12,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:16:12,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:16:12,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 99 transitions. [2024-06-21 20:16:12,307 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5689655172413793 [2024-06-21 20:16:12,308 INFO L175 Difference]: Start difference. First operand has 62 places, 37 transitions, 228 flow. Second operand 6 states and 99 transitions. [2024-06-21 20:16:12,308 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 46 transitions, 332 flow [2024-06-21 20:16:12,311 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 46 transitions, 297 flow, removed 1 selfloop flow, removed 9 redundant places. [2024-06-21 20:16:12,312 INFO L231 Difference]: Finished difference. Result has 59 places, 34 transitions, 192 flow [2024-06-21 20:16:12,312 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=193, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=192, PETRI_PLACES=59, PETRI_TRANSITIONS=34} [2024-06-21 20:16:12,313 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 31 predicate places. [2024-06-21 20:16:12,313 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 34 transitions, 192 flow [2024-06-21 20:16:12,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 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) [2024-06-21 20:16:12,313 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:16:12,313 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:16:12,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-21 20:16:12,313 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:16:12,313 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:16:12,313 INFO L85 PathProgramCache]: Analyzing trace with hash -1981605324, now seen corresponding path program 5 times [2024-06-21 20:16:12,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:16:12,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74036567] [2024-06-21 20:16:12,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:16:12,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:16:12,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:16:12,432 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:16:12,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:16:12,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74036567] [2024-06-21 20:16:12,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74036567] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:16:12,432 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:16:12,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:16:12,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528853530] [2024-06-21 20:16:12,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:16:12,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:16:12,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:16:12,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:16:12,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:16:12,490 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 29 [2024-06-21 20:16:12,490 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 34 transitions, 192 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 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) [2024-06-21 20:16:12,490 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:16:12,490 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 29 [2024-06-21 20:16:12,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:16:12,570 INFO L124 PetriNetUnfolderBase]: 82/193 cut-off events. [2024-06-21 20:16:12,570 INFO L125 PetriNetUnfolderBase]: For 1805/1805 co-relation queries the response was YES. [2024-06-21 20:16:12,571 INFO L83 FinitePrefix]: Finished finitePrefix Result has 719 conditions, 193 events. 82/193 cut-off events. For 1805/1805 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 752 event pairs, 27 based on Foata normal form. 6/199 useless extension candidates. Maximal degree in co-relation 690. Up to 111 conditions per place. [2024-06-21 20:16:12,571 INFO L140 encePairwiseOnDemand]: 22/29 looper letters, 23 selfloop transitions, 6 changer transitions 11/45 dead transitions. [2024-06-21 20:16:12,571 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 45 transitions, 298 flow [2024-06-21 20:16:12,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:16:12,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:16:12,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 111 transitions. [2024-06-21 20:16:12,573 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5467980295566502 [2024-06-21 20:16:12,573 INFO L175 Difference]: Start difference. First operand has 59 places, 34 transitions, 192 flow. Second operand 7 states and 111 transitions. [2024-06-21 20:16:12,573 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 45 transitions, 298 flow [2024-06-21 20:16:12,575 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 45 transitions, 274 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-21 20:16:12,576 INFO L231 Difference]: Finished difference. Result has 56 places, 30 transitions, 164 flow [2024-06-21 20:16:12,576 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=164, PETRI_PLACES=56, PETRI_TRANSITIONS=30} [2024-06-21 20:16:12,576 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 28 predicate places. [2024-06-21 20:16:12,576 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 30 transitions, 164 flow [2024-06-21 20:16:12,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 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) [2024-06-21 20:16:12,577 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:16:12,577 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:16:12,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-21 20:16:12,577 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:16:12,577 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:16:12,578 INFO L85 PathProgramCache]: Analyzing trace with hash -1247676486, now seen corresponding path program 6 times [2024-06-21 20:16:12,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:16:12,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783594874] [2024-06-21 20:16:12,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:16:12,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:16:12,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:16:12,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:16:12,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:16:12,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783594874] [2024-06-21 20:16:12,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783594874] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:16:12,682 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:16:12,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:16:12,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969925758] [2024-06-21 20:16:12,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:16:12,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:16:12,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:16:12,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:16:12,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:16:12,743 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 29 [2024-06-21 20:16:12,744 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 30 transitions, 164 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 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) [2024-06-21 20:16:12,744 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:16:12,744 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 29 [2024-06-21 20:16:12,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:16:12,828 INFO L124 PetriNetUnfolderBase]: 75/176 cut-off events. [2024-06-21 20:16:12,828 INFO L125 PetriNetUnfolderBase]: For 1713/1717 co-relation queries the response was YES. [2024-06-21 20:16:12,829 INFO L83 FinitePrefix]: Finished finitePrefix Result has 659 conditions, 176 events. 75/176 cut-off events. For 1713/1717 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 684 event pairs, 32 based on Foata normal form. 12/188 useless extension candidates. Maximal degree in co-relation 632. Up to 104 conditions per place. [2024-06-21 20:16:12,829 INFO L140 encePairwiseOnDemand]: 22/29 looper letters, 17 selfloop transitions, 8 changer transitions 9/39 dead transitions. [2024-06-21 20:16:12,829 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 39 transitions, 258 flow [2024-06-21 20:16:12,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:16:12,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:16:12,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 110 transitions. [2024-06-21 20:16:12,830 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.541871921182266 [2024-06-21 20:16:12,831 INFO L175 Difference]: Start difference. First operand has 56 places, 30 transitions, 164 flow. Second operand 7 states and 110 transitions. [2024-06-21 20:16:12,831 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 39 transitions, 258 flow [2024-06-21 20:16:12,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 39 transitions, 232 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-06-21 20:16:12,834 INFO L231 Difference]: Finished difference. Result has 49 places, 27 transitions, 139 flow [2024-06-21 20:16:12,834 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=139, PETRI_PLACES=49, PETRI_TRANSITIONS=27} [2024-06-21 20:16:12,834 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 21 predicate places. [2024-06-21 20:16:12,834 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 27 transitions, 139 flow [2024-06-21 20:16:12,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 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) [2024-06-21 20:16:12,835 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:16:12,835 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:16:12,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-21 20:16:12,835 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:16:12,835 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:16:12,835 INFO L85 PathProgramCache]: Analyzing trace with hash -1247830308, now seen corresponding path program 6 times [2024-06-21 20:16:12,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:16:12,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550054715] [2024-06-21 20:16:12,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:16:12,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:16:12,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:16:12,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:16:12,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:16:12,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550054715] [2024-06-21 20:16:12,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550054715] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:16:12,956 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:16:12,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:16:12,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610744385] [2024-06-21 20:16:12,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:16:12,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:16:12,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:16:12,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:16:12,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:16:13,003 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 29 [2024-06-21 20:16:13,003 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 27 transitions, 139 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 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) [2024-06-21 20:16:13,003 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:16:13,003 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 29 [2024-06-21 20:16:13,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:16:13,105 INFO L124 PetriNetUnfolderBase]: 66/161 cut-off events. [2024-06-21 20:16:13,106 INFO L125 PetriNetUnfolderBase]: For 1067/1067 co-relation queries the response was YES. [2024-06-21 20:16:13,106 INFO L83 FinitePrefix]: Finished finitePrefix Result has 573 conditions, 161 events. 66/161 cut-off events. For 1067/1067 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 597 event pairs, 26 based on Foata normal form. 6/167 useless extension candidates. Maximal degree in co-relation 550. Up to 56 conditions per place. [2024-06-21 20:16:13,107 INFO L140 encePairwiseOnDemand]: 22/29 looper letters, 21 selfloop transitions, 6 changer transitions 7/39 dead transitions. [2024-06-21 20:16:13,107 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 39 transitions, 259 flow [2024-06-21 20:16:13,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:16:13,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:16:13,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 110 transitions. [2024-06-21 20:16:13,108 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.541871921182266 [2024-06-21 20:16:13,108 INFO L175 Difference]: Start difference. First operand has 49 places, 27 transitions, 139 flow. Second operand 7 states and 110 transitions. [2024-06-21 20:16:13,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 39 transitions, 259 flow [2024-06-21 20:16:13,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 39 transitions, 235 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-21 20:16:13,111 INFO L231 Difference]: Finished difference. Result has 47 places, 24 transitions, 117 flow [2024-06-21 20:16:13,111 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=119, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=117, PETRI_PLACES=47, PETRI_TRANSITIONS=24} [2024-06-21 20:16:13,111 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 19 predicate places. [2024-06-21 20:16:13,112 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 24 transitions, 117 flow [2024-06-21 20:16:13,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 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) [2024-06-21 20:16:13,112 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:16:13,112 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:16:13,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-21 20:16:13,112 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:16:13,113 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:16:13,113 INFO L85 PathProgramCache]: Analyzing trace with hash 431425198, now seen corresponding path program 7 times [2024-06-21 20:16:13,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:16:13,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712748333] [2024-06-21 20:16:13,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:16:13,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:16:13,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:16:13,225 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:16:13,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:16:13,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712748333] [2024-06-21 20:16:13,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712748333] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:16:13,226 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:16:13,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:16:13,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190858471] [2024-06-21 20:16:13,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:16:13,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:16:13,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:16:13,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:16:13,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:16:13,284 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 29 [2024-06-21 20:16:13,284 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 24 transitions, 117 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 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) [2024-06-21 20:16:13,284 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:16:13,285 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 29 [2024-06-21 20:16:13,285 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:16:13,350 INFO L124 PetriNetUnfolderBase]: 41/104 cut-off events. [2024-06-21 20:16:13,351 INFO L125 PetriNetUnfolderBase]: For 617/617 co-relation queries the response was YES. [2024-06-21 20:16:13,351 INFO L83 FinitePrefix]: Finished finitePrefix Result has 342 conditions, 104 events. 41/104 cut-off events. For 617/617 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 295 event pairs, 18 based on Foata normal form. 8/112 useless extension candidates. Maximal degree in co-relation 320. Up to 44 conditions per place. [2024-06-21 20:16:13,352 INFO L140 encePairwiseOnDemand]: 22/29 looper letters, 14 selfloop transitions, 4 changer transitions 9/32 dead transitions. [2024-06-21 20:16:13,352 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 32 transitions, 191 flow [2024-06-21 20:16:13,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:16:13,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:16:13,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 105 transitions. [2024-06-21 20:16:13,354 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5172413793103449 [2024-06-21 20:16:13,354 INFO L175 Difference]: Start difference. First operand has 47 places, 24 transitions, 117 flow. Second operand 7 states and 105 transitions. [2024-06-21 20:16:13,354 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 32 transitions, 191 flow [2024-06-21 20:16:13,355 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 32 transitions, 173 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-21 20:16:13,355 INFO L231 Difference]: Finished difference. Result has 44 places, 20 transitions, 86 flow [2024-06-21 20:16:13,355 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=99, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=86, PETRI_PLACES=44, PETRI_TRANSITIONS=20} [2024-06-21 20:16:13,356 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 16 predicate places. [2024-06-21 20:16:13,356 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 20 transitions, 86 flow [2024-06-21 20:16:13,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 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) [2024-06-21 20:16:13,356 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:16:13,356 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:16:13,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-21 20:16:13,357 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:16:13,357 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:16:13,357 INFO L85 PathProgramCache]: Analyzing trace with hash 431640400, now seen corresponding path program 7 times [2024-06-21 20:16:13,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:16:13,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930060325] [2024-06-21 20:16:13,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:16:13,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:16:13,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:16:13,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:16:13,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:16:13,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930060325] [2024-06-21 20:16:13,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930060325] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:16:13,466 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:16:13,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:16:13,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995878345] [2024-06-21 20:16:13,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:16:13,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:16:13,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:16:13,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:16:13,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:16:13,504 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 29 [2024-06-21 20:16:13,505 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 20 transitions, 86 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 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) [2024-06-21 20:16:13,505 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:16:13,505 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 29 [2024-06-21 20:16:13,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:16:13,553 INFO L124 PetriNetUnfolderBase]: 17/54 cut-off events. [2024-06-21 20:16:13,554 INFO L125 PetriNetUnfolderBase]: For 173/173 co-relation queries the response was YES. [2024-06-21 20:16:13,554 INFO L83 FinitePrefix]: Finished finitePrefix Result has 148 conditions, 54 events. 17/54 cut-off events. For 173/173 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 79 event pairs, 1 based on Foata normal form. 6/60 useless extension candidates. Maximal degree in co-relation 136. Up to 24 conditions per place. [2024-06-21 20:16:13,554 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 0 selfloop transitions, 0 changer transitions 24/24 dead transitions. [2024-06-21 20:16:13,554 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 24 transitions, 118 flow [2024-06-21 20:16:13,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:16:13,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:16:13,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 97 transitions. [2024-06-21 20:16:13,555 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47783251231527096 [2024-06-21 20:16:13,555 INFO L175 Difference]: Start difference. First operand has 44 places, 20 transitions, 86 flow. Second operand 7 states and 97 transitions. [2024-06-21 20:16:13,555 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 24 transitions, 118 flow [2024-06-21 20:16:13,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 24 transitions, 94 flow, removed 2 selfloop flow, removed 11 redundant places. [2024-06-21 20:16:13,556 INFO L231 Difference]: Finished difference. Result has 33 places, 0 transitions, 0 flow [2024-06-21 20:16:13,556 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=0, PETRI_PLACES=33, PETRI_TRANSITIONS=0} [2024-06-21 20:16:13,557 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 5 predicate places. [2024-06-21 20:16:13,557 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 0 transitions, 0 flow [2024-06-21 20:16:13,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 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) [2024-06-21 20:16:13,560 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 4 remaining) [2024-06-21 20:16:13,560 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (2 of 4 remaining) [2024-06-21 20:16:13,562 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2024-06-21 20:16:13,563 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2024-06-21 20:16:13,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-21 20:16:13,564 INFO L445 BasicCegarLoop]: Path program histogram: [7, 7, 6, 4, 4, 3, 3, 1, 1, 1, 1, 1] [2024-06-21 20:16:13,567 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2024-06-21 20:16:13,567 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2024-06-21 20:16:13,570 INFO L507 ceAbstractionStarter]: Automizer considered 2 witness invariants [2024-06-21 20:16:13,570 INFO L508 ceAbstractionStarter]: WitnessConsidered=2 [2024-06-21 20:16:13,572 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.06 08:16:13 BasicIcfg [2024-06-21 20:16:13,572 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-06-21 20:16:13,572 INFO L158 Benchmark]: Toolchain (without parser) took 11724.54ms. Allocated memory was 159.4MB in the beginning and 371.2MB in the end (delta: 211.8MB). Free memory was 102.9MB in the beginning and 244.0MB in the end (delta: -141.1MB). Peak memory consumption was 71.2MB. Max. memory is 16.1GB. [2024-06-21 20:16:13,573 INFO L158 Benchmark]: Witness Parser took 0.10ms. Allocated memory is still 159.4MB. Free memory is still 121.9MB. There was no memory consumed. Max. memory is 16.1GB. [2024-06-21 20:16:13,573 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 159.4MB. Free memory is still 118.2MB. There was no memory consumed. Max. memory is 16.1GB. [2024-06-21 20:16:13,573 INFO L158 Benchmark]: CACSL2BoogieTranslator took 569.03ms. Allocated memory is still 159.4MB. Free memory was 102.4MB in the beginning and 76.7MB in the end (delta: 25.7MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. [2024-06-21 20:16:13,573 INFO L158 Benchmark]: Boogie Procedure Inliner took 64.93ms. Allocated memory is still 159.4MB. Free memory was 76.7MB in the beginning and 74.2MB in the end (delta: 2.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-06-21 20:16:13,574 INFO L158 Benchmark]: Boogie Preprocessor took 71.15ms. Allocated memory is still 159.4MB. Free memory was 74.2MB in the beginning and 72.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-06-21 20:16:13,574 INFO L158 Benchmark]: RCFGBuilder took 410.60ms. Allocated memory is still 159.4MB. Free memory was 72.1MB in the beginning and 114.6MB in the end (delta: -42.5MB). Peak memory consumption was 14.0MB. Max. memory is 16.1GB. [2024-06-21 20:16:13,575 INFO L158 Benchmark]: TraceAbstraction took 10600.00ms. Allocated memory was 159.4MB in the beginning and 371.2MB in the end (delta: 211.8MB). Free memory was 113.8MB in the beginning and 244.0MB in the end (delta: -130.3MB). Peak memory consumption was 80.3MB. Max. memory is 16.1GB. [2024-06-21 20:16:13,579 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 0.10ms. Allocated memory is still 159.4MB. Free memory is still 121.9MB. There was no memory consumed. Max. memory is 16.1GB. * CDTParser took 0.15ms. Allocated memory is still 159.4MB. Free memory is still 118.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 569.03ms. Allocated memory is still 159.4MB. Free memory was 102.4MB in the beginning and 76.7MB in the end (delta: 25.7MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 64.93ms. Allocated memory is still 159.4MB. Free memory was 76.7MB in the beginning and 74.2MB in the end (delta: 2.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 71.15ms. Allocated memory is still 159.4MB. Free memory was 74.2MB in the beginning and 72.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 410.60ms. Allocated memory is still 159.4MB. Free memory was 72.1MB in the beginning and 114.6MB in the end (delta: -42.5MB). Peak memory consumption was 14.0MB. Max. memory is 16.1GB. * TraceAbstraction took 10600.00ms. Allocated memory was 159.4MB in the beginning and 371.2MB in the end (delta: 211.8MB). Free memory was 113.8MB in the beginning and 244.0MB in the end (delta: -130.3MB). Peak memory consumption was 80.3MB. 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 - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 46 locations, 4 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 10.5s, OverallIterations: 39, TraceHistogramMax: 1, PathProgramHistogramMax: 7, EmptinessCheckTime: 0.0s, AutomataDifference: 5.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1828 SdHoareTripleChecker+Valid, 3.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1371 mSDsluCounter, 344 SdHoareTripleChecker+Invalid, 2.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 205 mSDsCounter, 226 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 5941 IncrementalHoareTripleChecker+Invalid, 6167 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 226 mSolverCounterUnsat, 139 mSDtfsCounter, 5941 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 229 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 229 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 1.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=524occurred in iteration=25, InterpolantAutomatonStates: 254, 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, 0.1s SatisfiabilityAnalysisTime, 4.6s InterpolantComputationTime, 549 NumberOfCodeBlocks, 549 NumberOfCodeBlocksAsserted, 39 NumberOfCheckSat, 510 ConstructedInterpolants, 0 QuantifiedInterpolants, 5005 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 39 InterpolantComputations, 39 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 2 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2024-06-21 20:16:13,608 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