./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-atomic/peterson.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-05-21_14-57-05.files/mutex-meet/peterson.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 76401ed0 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-atomic/peterson.i ./goblint.2024-05-21_14-57-05.files/mutex-meet/peterson.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-76401ed-m [2024-06-20 17:44:54,534 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-20 17:44:54,645 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-20 17:44:54,649 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-20 17:44:54,649 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-20 17:44:54,686 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-20 17:44:54,700 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-20 17:44:54,700 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-20 17:44:54,701 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-20 17:44:54,704 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-20 17:44:54,704 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-20 17:44:54,705 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-20 17:44:54,705 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-20 17:44:54,706 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-20 17:44:54,706 INFO L153 SettingsManager]: * Use SBE=true [2024-06-20 17:44:54,707 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-20 17:44:54,707 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-20 17:44:54,707 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-20 17:44:54,707 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-20 17:44:54,707 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-20 17:44:54,708 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-20 17:44:54,708 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-20 17:44:54,708 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-20 17:44:54,708 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-20 17:44:54,708 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-20 17:44:54,709 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-20 17:44:54,709 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-20 17:44:54,709 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-20 17:44:54,709 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-20 17:44:54,710 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-20 17:44:54,710 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-20 17:44:54,710 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-20 17:44:54,711 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-20 17:44:54,715 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-20 17:44:54,715 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-20 17:44:54,715 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-20 17:44:54,716 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-20 17:44:54,716 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-20 17:44:54,716 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-20 17:44:54,716 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-20 17:44:54,716 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-20 17:44:54,717 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-20 17:44:54,717 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-20 17:44:54,717 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-20 17:44:54,962 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-20 17:44:54,991 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-20 17:44:54,993 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-20 17:44:54,994 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-20 17:44:54,996 INFO L274 PluginConnector]: CDTParser initialized [2024-06-20 17:44:54,997 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-atomic/peterson.i [2024-06-20 17:44:56,153 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-20 17:44:56,340 INFO L384 CDTParser]: Found 1 translation units. [2024-06-20 17:44:56,340 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-atomic/peterson.i [2024-06-20 17:44:56,351 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9aa85126c/c91f611cefb54f0184801012d60757df/FLAG58b7cfc66 [2024-06-20 17:44:56,362 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9aa85126c/c91f611cefb54f0184801012d60757df [2024-06-20 17:44:56,364 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-20 17:44:56,365 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-20 17:44:56,367 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/mutex-meet/peterson.yml/witness.yml [2024-06-20 17:44:56,465 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-20 17:44:56,466 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-20 17:44:56,467 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-20 17:44:56,467 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-20 17:44:56,471 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-20 17:44:56,471 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.06 05:44:56" (1/2) ... [2024-06-20 17:44:56,472 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@66991a79 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:44:56, skipping insertion in model container [2024-06-20 17:44:56,472 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.06 05:44:56" (1/2) ... [2024-06-20 17:44:56,474 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@231182af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:44:56, skipping insertion in model container [2024-06-20 17:44:56,475 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 05:44:56" (2/2) ... [2024-06-20 17:44:56,475 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@66991a79 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 05:44:56, skipping insertion in model container [2024-06-20 17:44:56,475 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 05:44:56" (2/2) ... [2024-06-20 17:44:56,475 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-20 17:44:56,510 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-20 17:44:56,511 INFO L97 edCorrectnessWitness]: Location invariant before [L762-L762] (((((! multithreaded || ((0 <= turn && turn <= 1) && (turn == 0 || turn == 1))) && (! multithreaded || ((0 <= flag2 && flag2 <= 1) && (flag2 == 0 || flag2 == 1)))) && (! multithreaded || ((((((((1LL - (long long )flag1) + (long long )flag2 >= 0LL && (1LL - (long long )flag1) + (long long )turn >= 0LL) && (long long )flag1 + (long long )flag2 >= 0LL) && (long long )flag1 + (long long )turn >= 0LL) && (long long )flag2 + (long long )turn >= 0LL) && (1LL + (long long )flag1) - (long long )turn >= 0LL) && (1LL + (long long )flag2) - (long long )turn >= 0LL) && (2LL - (long long )flag1) - (long long )turn >= 0LL))) && (! multithreaded || ((0 <= flag1 && flag1 <= 1) && (flag1 == 0 || flag1 == 1)))) && (! multithreaded || ((((((((0 <= flag1 && 0 <= flag2) && 0 <= turn) && flag1 <= 1) && flag2 <= 1) && turn <= 1) && (flag1 == 0 || flag1 == 1)) && (flag2 == 0 || flag2 == 1)) && (turn == 0 || turn == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1))) [2024-06-20 17:44:56,512 INFO L97 edCorrectnessWitness]: Location invariant before [L763-L763] (((((! multithreaded || ((0 <= turn && turn <= 1) && (turn == 0 || turn == 1))) && (! multithreaded || ((0 <= flag2 && flag2 <= 1) && (flag2 == 0 || flag2 == 1)))) && (! multithreaded || ((((((((1LL - (long long )flag1) + (long long )flag2 >= 0LL && (1LL - (long long )flag1) + (long long )turn >= 0LL) && (long long )flag1 + (long long )flag2 >= 0LL) && (long long )flag1 + (long long )turn >= 0LL) && (long long )flag2 + (long long )turn >= 0LL) && (1LL + (long long )flag1) - (long long )turn >= 0LL) && (1LL + (long long )flag2) - (long long )turn >= 0LL) && (2LL - (long long )flag1) - (long long )turn >= 0LL))) && (! multithreaded || ((0 <= flag1 && flag1 <= 1) && (flag1 == 0 || flag1 == 1)))) && (! multithreaded || ((((((((0 <= flag1 && 0 <= flag2) && 0 <= turn) && flag1 <= 1) && flag2 <= 1) && turn <= 1) && (flag1 == 0 || flag1 == 1)) && (flag2 == 0 || flag2 == 1)) && (turn == 0 || turn == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1))) [2024-06-20 17:44:56,512 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-20 17:44:56,512 INFO L106 edCorrectnessWitness]: ghost_update [L761-L761] multithreaded = 1; [2024-06-20 17:44:56,550 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-20 17:44:56,846 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-20 17:44:56,855 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-20 17:44:56,948 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-20 17:44:56,973 INFO L206 MainTranslator]: Completed translation [2024-06-20 17:44:56,974 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 05:44:56 WrapperNode [2024-06-20 17:44:56,974 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-20 17:44:56,975 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-20 17:44:56,975 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-20 17:44:56,975 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-20 17:44:56,980 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 05:44:56" (1/1) ... [2024-06-20 17:44:56,990 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 05:44:56" (1/1) ... [2024-06-20 17:44:57,010 INFO L138 Inliner]: procedures = 169, calls = 38, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 103 [2024-06-20 17:44:57,010 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-20 17:44:57,012 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-20 17:44:57,012 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-20 17:44:57,012 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-20 17:44:57,019 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 05:44:56" (1/1) ... [2024-06-20 17:44:57,020 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 05:44:56" (1/1) ... [2024-06-20 17:44:57,023 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 05:44:56" (1/1) ... [2024-06-20 17:44:57,033 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-20 17:44:57,034 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 05:44:56" (1/1) ... [2024-06-20 17:44:57,034 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 05:44:56" (1/1) ... [2024-06-20 17:44:57,037 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 05:44:56" (1/1) ... [2024-06-20 17:44:57,040 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 05:44:56" (1/1) ... [2024-06-20 17:44:57,048 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 05:44:56" (1/1) ... [2024-06-20 17:44:57,049 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 05:44:56" (1/1) ... [2024-06-20 17:44:57,051 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-20 17:44:57,051 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-20 17:44:57,052 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-20 17:44:57,052 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-20 17:44:57,052 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 05:44:56" (1/1) ... [2024-06-20 17:44:57,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-20 17:44:57,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-20 17:44:57,079 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-20 17:44:57,082 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-20 17:44:57,121 INFO L130 BoogieDeclarations]: Found specification of procedure thr2 [2024-06-20 17:44:57,122 INFO L138 BoogieDeclarations]: Found implementation of procedure thr2 [2024-06-20 17:44:57,122 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2024-06-20 17:44:57,122 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2024-06-20 17:44:57,122 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-20 17:44:57,122 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-20 17:44:57,122 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-20 17:44:57,123 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-20 17:44:57,123 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-20 17:44:57,123 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-20 17:44:57,124 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-20 17:44:57,214 INFO L244 CfgBuilder]: Building ICFG [2024-06-20 17:44:57,216 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-20 17:44:57,415 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-20 17:44:57,416 INFO L293 CfgBuilder]: Performing block encoding [2024-06-20 17:44:57,465 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-20 17:44:57,465 INFO L320 CfgBuilder]: Removed 2 assume(true) statements. [2024-06-20 17:44:57,466 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.06 05:44:57 BoogieIcfgContainer [2024-06-20 17:44:57,466 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-20 17:44:57,467 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-20 17:44:57,467 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-20 17:44:57,470 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-20 17:44:57,470 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.06 05:44:56" (1/4) ... [2024-06-20 17:44:57,470 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60a5f5fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.06 05:44:57, skipping insertion in model container [2024-06-20 17:44:57,470 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 05:44:56" (2/4) ... [2024-06-20 17:44:57,471 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60a5f5fc and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 20.06 05:44:57, skipping insertion in model container [2024-06-20 17:44:57,471 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 05:44:56" (3/4) ... [2024-06-20 17:44:57,471 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60a5f5fc and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 20.06 05:44:57, skipping insertion in model container [2024-06-20 17:44:57,471 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.06 05:44:57" (4/4) ... [2024-06-20 17:44:57,472 INFO L112 eAbstractionObserver]: Analyzing ICFG peterson.i [2024-06-20 17:44:57,485 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-20 17:44:57,485 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-06-20 17:44:57,485 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-20 17:44:57,542 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-06-20 17:44:57,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 42 places, 37 transitions, 88 flow [2024-06-20 17:44:57,603 INFO L124 PetriNetUnfolderBase]: 2/35 cut-off events. [2024-06-20 17:44:57,604 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-06-20 17:44:57,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44 conditions, 35 events. 2/35 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 51 event pairs, 0 based on Foata normal form. 0/31 useless extension candidates. Maximal degree in co-relation 31. Up to 2 conditions per place. [2024-06-20 17:44:57,608 INFO L82 GeneralOperation]: Start removeDead. Operand has 42 places, 37 transitions, 88 flow [2024-06-20 17:44:57,611 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 38 places, 33 transitions, 75 flow [2024-06-20 17:44:57,625 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-20 17:44:57,633 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;@1665a14d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-20 17:44:57,634 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-06-20 17:44:57,638 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-20 17:44:57,638 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-20 17:44:57,638 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-20 17:44:57,638 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:44:57,639 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-20 17:44:57,639 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)] === [2024-06-20 17:44:57,645 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:44:57,646 INFO L85 PathProgramCache]: Analyzing trace with hash 210989746, now seen corresponding path program 1 times [2024-06-20 17:44:57,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:44:57,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579968930] [2024-06-20 17:44:57,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:44:57,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:44:57,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:44:58,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:44:58,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:44:58,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579968930] [2024-06-20 17:44:58,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579968930] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:44:58,026 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:44:58,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-20 17:44:58,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592247626] [2024-06-20 17:44:58,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:44:58,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-20 17:44:58,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:44:58,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-20 17:44:58,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-20 17:44:58,091 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 37 [2024-06-20 17:44:58,094 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 33 transitions, 75 flow. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 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) [2024-06-20 17:44:58,094 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:44:58,094 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 37 [2024-06-20 17:44:58,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:44:58,202 INFO L124 PetriNetUnfolderBase]: 105/277 cut-off events. [2024-06-20 17:44:58,202 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2024-06-20 17:44:58,206 INFO L83 FinitePrefix]: Finished finitePrefix Result has 470 conditions, 277 events. 105/277 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1296 event pairs, 50 based on Foata normal form. 1/256 useless extension candidates. Maximal degree in co-relation 441. Up to 168 conditions per place. [2024-06-20 17:44:58,209 INFO L140 encePairwiseOnDemand]: 32/37 looper letters, 19 selfloop transitions, 3 changer transitions 0/39 dead transitions. [2024-06-20 17:44:58,209 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 39 transitions, 134 flow [2024-06-20 17:44:58,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-20 17:44:58,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-20 17:44:58,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 81 transitions. [2024-06-20 17:44:58,219 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7297297297297297 [2024-06-20 17:44:58,221 INFO L175 Difference]: Start difference. First operand has 38 places, 33 transitions, 75 flow. Second operand 3 states and 81 transitions. [2024-06-20 17:44:58,221 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 39 transitions, 134 flow [2024-06-20 17:44:58,223 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 39 transitions, 128 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-20 17:44:58,225 INFO L231 Difference]: Finished difference. Result has 38 places, 35 transitions, 91 flow [2024-06-20 17:44:58,227 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=91, PETRI_PLACES=38, PETRI_TRANSITIONS=35} [2024-06-20 17:44:58,229 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 0 predicate places. [2024-06-20 17:44:58,230 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 35 transitions, 91 flow [2024-06-20 17:44:58,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 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) [2024-06-20 17:44:58,230 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:44:58,230 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:44:58,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-20 17:44:58,231 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)] === [2024-06-20 17:44:58,231 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:44:58,232 INFO L85 PathProgramCache]: Analyzing trace with hash 897716593, now seen corresponding path program 1 times [2024-06-20 17:44:58,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:44:58,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048270394] [2024-06-20 17:44:58,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:44:58,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:44:58,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:44:58,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:44:58,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:44:58,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048270394] [2024-06-20 17:44:58,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048270394] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:44:58,363 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:44:58,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-20 17:44:58,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985418833] [2024-06-20 17:44:58,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:44:58,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-20 17:44:58,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:44:58,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-20 17:44:58,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-20 17:44:58,398 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 37 [2024-06-20 17:44:58,398 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 35 transitions, 91 flow. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:44:58,399 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:44:58,399 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 37 [2024-06-20 17:44:58,399 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:44:58,450 INFO L124 PetriNetUnfolderBase]: 121/290 cut-off events. [2024-06-20 17:44:58,450 INFO L125 PetriNetUnfolderBase]: For 44/44 co-relation queries the response was YES. [2024-06-20 17:44:58,451 INFO L83 FinitePrefix]: Finished finitePrefix Result has 577 conditions, 290 events. 121/290 cut-off events. For 44/44 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1347 event pairs, 52 based on Foata normal form. 2/272 useless extension candidates. Maximal degree in co-relation 449. Up to 191 conditions per place. [2024-06-20 17:44:58,452 INFO L140 encePairwiseOnDemand]: 31/37 looper letters, 24 selfloop transitions, 5 changer transitions 0/45 dead transitions. [2024-06-20 17:44:58,452 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 45 transitions, 175 flow [2024-06-20 17:44:58,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-20 17:44:58,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-20 17:44:58,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 103 transitions. [2024-06-20 17:44:58,454 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6959459459459459 [2024-06-20 17:44:58,454 INFO L175 Difference]: Start difference. First operand has 38 places, 35 transitions, 91 flow. Second operand 4 states and 103 transitions. [2024-06-20 17:44:58,454 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 45 transitions, 175 flow [2024-06-20 17:44:58,455 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 45 transitions, 172 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-20 17:44:58,456 INFO L231 Difference]: Finished difference. Result has 41 places, 37 transitions, 115 flow [2024-06-20 17:44:58,456 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=115, PETRI_PLACES=41, PETRI_TRANSITIONS=37} [2024-06-20 17:44:58,457 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 3 predicate places. [2024-06-20 17:44:58,457 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 37 transitions, 115 flow [2024-06-20 17:44:58,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:44:58,457 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:44:58,457 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:44:58,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-20 17:44:58,458 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)] === [2024-06-20 17:44:58,458 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:44:58,458 INFO L85 PathProgramCache]: Analyzing trace with hash 2059411718, now seen corresponding path program 1 times [2024-06-20 17:44:58,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:44:58,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16715498] [2024-06-20 17:44:58,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:44:58,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:44:58,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:44:58,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:44:58,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:44:58,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16715498] [2024-06-20 17:44:58,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16715498] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:44:58,601 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:44:58,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-20 17:44:58,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458073371] [2024-06-20 17:44:58,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:44:58,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-20 17:44:58,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:44:58,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-20 17:44:58,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-20 17:44:58,630 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 37 [2024-06-20 17:44:58,631 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 37 transitions, 115 flow. Second operand has 5 states, 5 states have (on average 18.2) internal successors, (91), 5 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:44:58,631 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:44:58,631 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 37 [2024-06-20 17:44:58,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:44:58,691 INFO L124 PetriNetUnfolderBase]: 143/321 cut-off events. [2024-06-20 17:44:58,691 INFO L125 PetriNetUnfolderBase]: For 148/148 co-relation queries the response was YES. [2024-06-20 17:44:58,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 715 conditions, 321 events. 143/321 cut-off events. For 148/148 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1461 event pairs, 51 based on Foata normal form. 4/313 useless extension candidates. Maximal degree in co-relation 537. Up to 185 conditions per place. [2024-06-20 17:44:58,694 INFO L140 encePairwiseOnDemand]: 30/37 looper letters, 29 selfloop transitions, 8 changer transitions 0/52 dead transitions. [2024-06-20 17:44:58,694 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 52 transitions, 232 flow [2024-06-20 17:44:58,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 17:44:58,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 17:44:58,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 123 transitions. [2024-06-20 17:44:58,696 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6648648648648648 [2024-06-20 17:44:58,696 INFO L175 Difference]: Start difference. First operand has 41 places, 37 transitions, 115 flow. Second operand 5 states and 123 transitions. [2024-06-20 17:44:58,696 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 52 transitions, 232 flow [2024-06-20 17:44:58,697 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 52 transitions, 223 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-06-20 17:44:58,697 INFO L231 Difference]: Finished difference. Result has 44 places, 39 transitions, 139 flow [2024-06-20 17:44:58,698 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=139, PETRI_PLACES=44, PETRI_TRANSITIONS=39} [2024-06-20 17:44:58,698 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 6 predicate places. [2024-06-20 17:44:58,698 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 39 transitions, 139 flow [2024-06-20 17:44:58,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 5 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:44:58,699 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:44:58,699 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:44:58,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-20 17:44:58,699 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 17:44:58,700 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:44:58,700 INFO L85 PathProgramCache]: Analyzing trace with hash -1646965865, now seen corresponding path program 1 times [2024-06-20 17:44:58,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:44:58,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134137575] [2024-06-20 17:44:58,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:44:58,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:44:58,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:44:58,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:44:58,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:44:58,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134137575] [2024-06-20 17:44:58,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134137575] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:44:58,789 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:44:58,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-20 17:44:58,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173849895] [2024-06-20 17:44:58,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:44:58,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-20 17:44:58,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:44:58,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-20 17:44:58,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-20 17:44:58,826 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 37 [2024-06-20 17:44:58,826 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 39 transitions, 139 flow. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:44:58,826 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:44:58,826 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 37 [2024-06-20 17:44:58,826 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:44:58,868 INFO L124 PetriNetUnfolderBase]: 125/294 cut-off events. [2024-06-20 17:44:58,868 INFO L125 PetriNetUnfolderBase]: For 250/250 co-relation queries the response was YES. [2024-06-20 17:44:58,869 INFO L83 FinitePrefix]: Finished finitePrefix Result has 709 conditions, 294 events. 125/294 cut-off events. For 250/250 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1324 event pairs, 46 based on Foata normal form. 1/283 useless extension candidates. Maximal degree in co-relation 580. Up to 200 conditions per place. [2024-06-20 17:44:58,870 INFO L140 encePairwiseOnDemand]: 32/37 looper letters, 24 selfloop transitions, 5 changer transitions 0/46 dead transitions. [2024-06-20 17:44:58,870 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 46 transitions, 215 flow [2024-06-20 17:44:58,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-20 17:44:58,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-20 17:44:58,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 99 transitions. [2024-06-20 17:44:58,871 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.668918918918919 [2024-06-20 17:44:58,871 INFO L175 Difference]: Start difference. First operand has 44 places, 39 transitions, 139 flow. Second operand 4 states and 99 transitions. [2024-06-20 17:44:58,872 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 46 transitions, 215 flow [2024-06-20 17:44:58,873 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 46 transitions, 203 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-20 17:44:58,873 INFO L231 Difference]: Finished difference. Result has 46 places, 41 transitions, 152 flow [2024-06-20 17:44:58,873 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=127, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=152, PETRI_PLACES=46, PETRI_TRANSITIONS=41} [2024-06-20 17:44:58,874 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 8 predicate places. [2024-06-20 17:44:58,874 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 41 transitions, 152 flow [2024-06-20 17:44:58,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:44:58,874 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:44:58,875 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:44:58,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-20 17:44:58,875 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)] === [2024-06-20 17:44:58,875 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:44:58,875 INFO L85 PathProgramCache]: Analyzing trace with hash 2119259478, now seen corresponding path program 1 times [2024-06-20 17:44:58,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:44:58,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758558008] [2024-06-20 17:44:58,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:44:58,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:44:58,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:44:58,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:44:58,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:44:58,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758558008] [2024-06-20 17:44:58,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758558008] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:44:58,965 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:44:58,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-20 17:44:58,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214642227] [2024-06-20 17:44:58,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:44:58,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-20 17:44:58,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:44:58,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-20 17:44:58,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-20 17:44:59,019 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 37 [2024-06-20 17:44:59,020 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 41 transitions, 152 flow. Second operand has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:44:59,020 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:44:59,020 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 37 [2024-06-20 17:44:59,020 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:44:59,069 INFO L124 PetriNetUnfolderBase]: 143/316 cut-off events. [2024-06-20 17:44:59,069 INFO L125 PetriNetUnfolderBase]: For 370/385 co-relation queries the response was YES. [2024-06-20 17:44:59,070 INFO L83 FinitePrefix]: Finished finitePrefix Result has 820 conditions, 316 events. 143/316 cut-off events. For 370/385 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1372 event pairs, 54 based on Foata normal form. 3/307 useless extension candidates. Maximal degree in co-relation 678. Up to 220 conditions per place. [2024-06-20 17:44:59,071 INFO L140 encePairwiseOnDemand]: 31/37 looper letters, 30 selfloop transitions, 10 changer transitions 0/55 dead transitions. [2024-06-20 17:44:59,071 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 55 transitions, 280 flow [2024-06-20 17:44:59,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 17:44:59,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 17:44:59,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 122 transitions. [2024-06-20 17:44:59,072 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6594594594594595 [2024-06-20 17:44:59,072 INFO L175 Difference]: Start difference. First operand has 46 places, 41 transitions, 152 flow. Second operand 5 states and 122 transitions. [2024-06-20 17:44:59,072 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 55 transitions, 280 flow [2024-06-20 17:44:59,074 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 55 transitions, 271 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-06-20 17:44:59,074 INFO L231 Difference]: Finished difference. Result has 49 places, 45 transitions, 188 flow [2024-06-20 17:44:59,074 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=143, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=188, PETRI_PLACES=49, PETRI_TRANSITIONS=45} [2024-06-20 17:44:59,075 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 11 predicate places. [2024-06-20 17:44:59,075 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 45 transitions, 188 flow [2024-06-20 17:44:59,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:44:59,076 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:44:59,076 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:44:59,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-20 17:44:59,076 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)] === [2024-06-20 17:44:59,076 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:44:59,076 INFO L85 PathProgramCache]: Analyzing trace with hash -1334452546, now seen corresponding path program 2 times [2024-06-20 17:44:59,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:44:59,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775413482] [2024-06-20 17:44:59,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:44:59,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:44:59,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:44:59,170 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:44:59,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:44:59,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775413482] [2024-06-20 17:44:59,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775413482] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:44:59,171 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:44:59,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-20 17:44:59,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848317539] [2024-06-20 17:44:59,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:44:59,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-20 17:44:59,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:44:59,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-20 17:44:59,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-20 17:44:59,198 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 37 [2024-06-20 17:44:59,199 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 45 transitions, 188 flow. Second operand has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:44:59,199 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:44:59,199 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 37 [2024-06-20 17:44:59,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:44:59,255 INFO L124 PetriNetUnfolderBase]: 142/320 cut-off events. [2024-06-20 17:44:59,255 INFO L125 PetriNetUnfolderBase]: For 555/568 co-relation queries the response was YES. [2024-06-20 17:44:59,256 INFO L83 FinitePrefix]: Finished finitePrefix Result has 879 conditions, 320 events. 142/320 cut-off events. For 555/568 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1434 event pairs, 57 based on Foata normal form. 7/317 useless extension candidates. Maximal degree in co-relation 587. Up to 218 conditions per place. [2024-06-20 17:44:59,258 INFO L140 encePairwiseOnDemand]: 31/37 looper letters, 26 selfloop transitions, 10 changer transitions 0/51 dead transitions. [2024-06-20 17:44:59,258 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 51 transitions, 274 flow [2024-06-20 17:44:59,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 17:44:59,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 17:44:59,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 118 transitions. [2024-06-20 17:44:59,259 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6378378378378379 [2024-06-20 17:44:59,259 INFO L175 Difference]: Start difference. First operand has 49 places, 45 transitions, 188 flow. Second operand 5 states and 118 transitions. [2024-06-20 17:44:59,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 51 transitions, 274 flow [2024-06-20 17:44:59,263 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 51 transitions, 264 flow, removed 3 selfloop flow, removed 1 redundant places. [2024-06-20 17:44:59,264 INFO L231 Difference]: Finished difference. Result has 53 places, 45 transitions, 203 flow [2024-06-20 17:44:59,264 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=203, PETRI_PLACES=53, PETRI_TRANSITIONS=45} [2024-06-20 17:44:59,266 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 15 predicate places. [2024-06-20 17:44:59,267 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 45 transitions, 203 flow [2024-06-20 17:44:59,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:44:59,267 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:44:59,267 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:44:59,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-20 17:44:59,267 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 17:44:59,268 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:44:59,268 INFO L85 PathProgramCache]: Analyzing trace with hash -1802758047, now seen corresponding path program 1 times [2024-06-20 17:44:59,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:44:59,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995291440] [2024-06-20 17:44:59,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:44:59,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:44:59,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:44:59,384 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:44:59,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:44:59,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995291440] [2024-06-20 17:44:59,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995291440] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:44:59,385 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:44:59,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 17:44:59,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616326676] [2024-06-20 17:44:59,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:44:59,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 17:44:59,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:44:59,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 17:44:59,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-20 17:44:59,429 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 37 [2024-06-20 17:44:59,430 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 45 transitions, 203 flow. Second operand has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:44:59,430 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:44:59,430 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 37 [2024-06-20 17:44:59,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:44:59,517 INFO L124 PetriNetUnfolderBase]: 195/456 cut-off events. [2024-06-20 17:44:59,517 INFO L125 PetriNetUnfolderBase]: For 900/914 co-relation queries the response was YES. [2024-06-20 17:44:59,518 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1198 conditions, 456 events. 195/456 cut-off events. For 900/914 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 2238 event pairs, 26 based on Foata normal form. 10/461 useless extension candidates. Maximal degree in co-relation 865. Up to 134 conditions per place. [2024-06-20 17:44:59,519 INFO L140 encePairwiseOnDemand]: 29/37 looper letters, 46 selfloop transitions, 12 changer transitions 2/74 dead transitions. [2024-06-20 17:44:59,519 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 74 transitions, 433 flow [2024-06-20 17:44:59,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:44:59,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:44:59,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-20 17:44:59,521 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-06-20 17:44:59,521 INFO L175 Difference]: Start difference. First operand has 53 places, 45 transitions, 203 flow. Second operand 6 states and 148 transitions. [2024-06-20 17:44:59,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 74 transitions, 433 flow [2024-06-20 17:44:59,522 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 74 transitions, 406 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-20 17:44:59,523 INFO L231 Difference]: Finished difference. Result has 57 places, 48 transitions, 233 flow [2024-06-20 17:44:59,523 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=233, PETRI_PLACES=57, PETRI_TRANSITIONS=48} [2024-06-20 17:44:59,524 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 19 predicate places. [2024-06-20 17:44:59,524 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 48 transitions, 233 flow [2024-06-20 17:44:59,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:44:59,524 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:44:59,524 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:44:59,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-20 17:44:59,525 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)] === [2024-06-20 17:44:59,525 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:44:59,525 INFO L85 PathProgramCache]: Analyzing trace with hash 271121313, now seen corresponding path program 1 times [2024-06-20 17:44:59,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:44:59,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179361709] [2024-06-20 17:44:59,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:44:59,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:44:59,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:44:59,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:44:59,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:44:59,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179361709] [2024-06-20 17:44:59,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179361709] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:44:59,621 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:44:59,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 17:44:59,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039926637] [2024-06-20 17:44:59,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:44:59,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 17:44:59,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:44:59,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 17:44:59,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-20 17:44:59,662 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 37 [2024-06-20 17:44:59,662 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 48 transitions, 233 flow. Second operand has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:44:59,662 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:44:59,662 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 37 [2024-06-20 17:44:59,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:44:59,737 INFO L124 PetriNetUnfolderBase]: 241/547 cut-off events. [2024-06-20 17:44:59,737 INFO L125 PetriNetUnfolderBase]: For 1494/1513 co-relation queries the response was YES. [2024-06-20 17:44:59,739 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1643 conditions, 547 events. 241/547 cut-off events. For 1494/1513 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 2751 event pairs, 54 based on Foata normal form. 14/553 useless extension candidates. Maximal degree in co-relation 1213. Up to 176 conditions per place. [2024-06-20 17:44:59,741 INFO L140 encePairwiseOnDemand]: 28/37 looper letters, 41 selfloop transitions, 22 changer transitions 1/78 dead transitions. [2024-06-20 17:44:59,741 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 78 transitions, 505 flow [2024-06-20 17:44:59,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:44:59,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:44:59,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-20 17:44:59,742 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-06-20 17:44:59,742 INFO L175 Difference]: Start difference. First operand has 57 places, 48 transitions, 233 flow. Second operand 6 states and 148 transitions. [2024-06-20 17:44:59,742 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 78 transitions, 505 flow [2024-06-20 17:44:59,745 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 78 transitions, 495 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-06-20 17:44:59,746 INFO L231 Difference]: Finished difference. Result has 64 places, 58 transitions, 354 flow [2024-06-20 17:44:59,746 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=224, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=354, PETRI_PLACES=64, PETRI_TRANSITIONS=58} [2024-06-20 17:44:59,746 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 26 predicate places. [2024-06-20 17:44:59,746 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 58 transitions, 354 flow [2024-06-20 17:44:59,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:44:59,747 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:44:59,747 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:44:59,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-20 17:44:59,747 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)] === [2024-06-20 17:44:59,748 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:44:59,748 INFO L85 PathProgramCache]: Analyzing trace with hash 1272535939, now seen corresponding path program 2 times [2024-06-20 17:44:59,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:44:59,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453286935] [2024-06-20 17:44:59,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:44:59,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:44:59,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:44:59,857 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:44:59,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:44:59,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453286935] [2024-06-20 17:44:59,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453286935] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:44:59,857 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:44:59,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 17:44:59,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175192627] [2024-06-20 17:44:59,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:44:59,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 17:44:59,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:44:59,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 17:44:59,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-20 17:44:59,887 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 37 [2024-06-20 17:44:59,888 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 58 transitions, 354 flow. Second operand has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:44:59,888 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:44:59,888 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 37 [2024-06-20 17:44:59,888 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:44:59,982 INFO L124 PetriNetUnfolderBase]: 271/623 cut-off events. [2024-06-20 17:44:59,983 INFO L125 PetriNetUnfolderBase]: For 2391/2418 co-relation queries the response was YES. [2024-06-20 17:44:59,985 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2079 conditions, 623 events. 271/623 cut-off events. For 2391/2418 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 3330 event pairs, 59 based on Foata normal form. 20/631 useless extension candidates. Maximal degree in co-relation 1609. Up to 183 conditions per place. [2024-06-20 17:44:59,987 INFO L140 encePairwiseOnDemand]: 28/37 looper letters, 42 selfloop transitions, 24 changer transitions 1/81 dead transitions. [2024-06-20 17:44:59,988 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 81 transitions, 634 flow [2024-06-20 17:44:59,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:44:59,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:44:59,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 146 transitions. [2024-06-20 17:44:59,989 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6576576576576577 [2024-06-20 17:44:59,989 INFO L175 Difference]: Start difference. First operand has 64 places, 58 transitions, 354 flow. Second operand 6 states and 146 transitions. [2024-06-20 17:44:59,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 81 transitions, 634 flow [2024-06-20 17:44:59,993 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 81 transitions, 620 flow, removed 7 selfloop flow, removed 0 redundant places. [2024-06-20 17:44:59,994 INFO L231 Difference]: Finished difference. Result has 70 places, 63 transitions, 437 flow [2024-06-20 17:44:59,994 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=344, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=437, PETRI_PLACES=70, PETRI_TRANSITIONS=63} [2024-06-20 17:44:59,994 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 32 predicate places. [2024-06-20 17:44:59,995 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 63 transitions, 437 flow [2024-06-20 17:44:59,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:44:59,995 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:44:59,995 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:44:59,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-20 17:44:59,995 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)] === [2024-06-20 17:44:59,996 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:44:59,996 INFO L85 PathProgramCache]: Analyzing trace with hash -1270439519, now seen corresponding path program 3 times [2024-06-20 17:44:59,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:44:59,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256974247] [2024-06-20 17:44:59,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:44:59,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:45:00,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:45:00,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:45:00,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:45:00,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256974247] [2024-06-20 17:45:00,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256974247] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:45:00,097 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:45:00,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 17:45:00,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458219967] [2024-06-20 17:45:00,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:45:00,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 17:45:00,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:45:00,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 17:45:00,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-20 17:45:00,122 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 37 [2024-06-20 17:45:00,122 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 63 transitions, 437 flow. Second operand has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:45:00,122 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:45:00,123 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 37 [2024-06-20 17:45:00,123 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:45:00,254 INFO L124 PetriNetUnfolderBase]: 263/608 cut-off events. [2024-06-20 17:45:00,254 INFO L125 PetriNetUnfolderBase]: For 2938/2965 co-relation queries the response was YES. [2024-06-20 17:45:00,257 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2119 conditions, 608 events. 263/608 cut-off events. For 2938/2965 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 3192 event pairs, 47 based on Foata normal form. 12/613 useless extension candidates. Maximal degree in co-relation 1502. Up to 158 conditions per place. [2024-06-20 17:45:00,259 INFO L140 encePairwiseOnDemand]: 28/37 looper letters, 42 selfloop transitions, 21 changer transitions 2/79 dead transitions. [2024-06-20 17:45:00,259 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 79 transitions, 669 flow [2024-06-20 17:45:00,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:45:00,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:45:00,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 145 transitions. [2024-06-20 17:45:00,260 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6531531531531531 [2024-06-20 17:45:00,261 INFO L175 Difference]: Start difference. First operand has 70 places, 63 transitions, 437 flow. Second operand 6 states and 145 transitions. [2024-06-20 17:45:00,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 79 transitions, 669 flow [2024-06-20 17:45:00,282 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 79 transitions, 637 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-20 17:45:00,283 INFO L231 Difference]: Finished difference. Result has 74 places, 63 transitions, 453 flow [2024-06-20 17:45:00,283 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=405, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=453, PETRI_PLACES=74, PETRI_TRANSITIONS=63} [2024-06-20 17:45:00,285 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 36 predicate places. [2024-06-20 17:45:00,286 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 63 transitions, 453 flow [2024-06-20 17:45:00,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:45:00,286 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:45:00,286 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:45:00,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-20 17:45:00,287 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)] === [2024-06-20 17:45:00,287 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:45:00,287 INFO L85 PathProgramCache]: Analyzing trace with hash 518192841, now seen corresponding path program 1 times [2024-06-20 17:45:00,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:45:00,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100782640] [2024-06-20 17:45:00,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:45:00,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:45:00,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:45:00,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:45:00,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:45:00,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100782640] [2024-06-20 17:45:00,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100782640] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:45:00,499 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:45:00,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 17:45:00,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537186872] [2024-06-20 17:45:00,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:45:00,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 17:45:00,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:45:00,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 17:45:00,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-20 17:45:00,526 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 37 [2024-06-20 17:45:00,526 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 63 transitions, 453 flow. Second operand has 6 states, 6 states have (on average 17.833333333333332) internal successors, (107), 6 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:45:00,526 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:45:00,527 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 37 [2024-06-20 17:45:00,527 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:45:00,656 INFO L124 PetriNetUnfolderBase]: 259/605 cut-off events. [2024-06-20 17:45:00,656 INFO L125 PetriNetUnfolderBase]: For 3124/3147 co-relation queries the response was YES. [2024-06-20 17:45:00,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2125 conditions, 605 events. 259/605 cut-off events. For 3124/3147 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 3207 event pairs, 59 based on Foata normal form. 18/615 useless extension candidates. Maximal degree in co-relation 1616. Up to 180 conditions per place. [2024-06-20 17:45:00,661 INFO L140 encePairwiseOnDemand]: 28/37 looper letters, 40 selfloop transitions, 26 changer transitions 1/81 dead transitions. [2024-06-20 17:45:00,661 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 81 transitions, 693 flow [2024-06-20 17:45:00,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:45:00,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:45:00,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 145 transitions. [2024-06-20 17:45:00,673 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6531531531531531 [2024-06-20 17:45:00,674 INFO L175 Difference]: Start difference. First operand has 74 places, 63 transitions, 453 flow. Second operand 6 states and 145 transitions. [2024-06-20 17:45:00,674 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 81 transitions, 693 flow [2024-06-20 17:45:00,679 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 81 transitions, 640 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-20 17:45:00,682 INFO L231 Difference]: Finished difference. Result has 77 places, 65 transitions, 492 flow [2024-06-20 17:45:00,682 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=401, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=492, PETRI_PLACES=77, PETRI_TRANSITIONS=65} [2024-06-20 17:45:00,683 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 39 predicate places. [2024-06-20 17:45:00,683 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 65 transitions, 492 flow [2024-06-20 17:45:00,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.833333333333332) internal successors, (107), 6 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:45:00,684 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:45:00,684 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:45:00,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-20 17:45:00,684 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)] === [2024-06-20 17:45:00,685 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:45:00,685 INFO L85 PathProgramCache]: Analyzing trace with hash 1786374409, now seen corresponding path program 2 times [2024-06-20 17:45:00,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:45:00,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665133016] [2024-06-20 17:45:00,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:45:00,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:45:00,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:45:00,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:45:00,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:45:00,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665133016] [2024-06-20 17:45:00,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665133016] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:45:00,799 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:45:00,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 17:45:00,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445017163] [2024-06-20 17:45:00,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:45:00,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 17:45:00,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:45:00,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 17:45:00,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-20 17:45:00,826 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 37 [2024-06-20 17:45:00,827 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 65 transitions, 492 flow. Second operand has 6 states, 6 states have (on average 17.833333333333332) internal successors, (107), 6 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:45:00,827 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:45:00,827 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 37 [2024-06-20 17:45:00,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:45:00,915 INFO L124 PetriNetUnfolderBase]: 262/621 cut-off events. [2024-06-20 17:45:00,916 INFO L125 PetriNetUnfolderBase]: For 3555/3576 co-relation queries the response was YES. [2024-06-20 17:45:00,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2207 conditions, 621 events. 262/621 cut-off events. For 3555/3576 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 3319 event pairs, 54 based on Foata normal form. 10/627 useless extension candidates. Maximal degree in co-relation 1567. Up to 158 conditions per place. [2024-06-20 17:45:00,921 INFO L140 encePairwiseOnDemand]: 28/37 looper letters, 43 selfloop transitions, 23 changer transitions 2/82 dead transitions. [2024-06-20 17:45:00,921 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 82 transitions, 741 flow [2024-06-20 17:45:00,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:45:00,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:45:00,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 144 transitions. [2024-06-20 17:45:00,922 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6486486486486487 [2024-06-20 17:45:00,922 INFO L175 Difference]: Start difference. First operand has 77 places, 65 transitions, 492 flow. Second operand 6 states and 144 transitions. [2024-06-20 17:45:00,922 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 82 transitions, 741 flow [2024-06-20 17:45:00,927 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 82 transitions, 673 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-20 17:45:00,929 INFO L231 Difference]: Finished difference. Result has 79 places, 68 transitions, 518 flow [2024-06-20 17:45:00,929 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=428, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=518, PETRI_PLACES=79, PETRI_TRANSITIONS=68} [2024-06-20 17:45:00,931 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 41 predicate places. [2024-06-20 17:45:00,931 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 68 transitions, 518 flow [2024-06-20 17:45:00,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.833333333333332) internal successors, (107), 6 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:45:00,931 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:45:00,932 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:45:00,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-20 17:45:00,932 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)] === [2024-06-20 17:45:00,932 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:45:00,932 INFO L85 PathProgramCache]: Analyzing trace with hash -691718796, now seen corresponding path program 1 times [2024-06-20 17:45:00,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:45:00,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823152648] [2024-06-20 17:45:00,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:45:00,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:45:00,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:45:01,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:45:01,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:45:01,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823152648] [2024-06-20 17:45:01,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823152648] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:45:01,031 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:45:01,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 17:45:01,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108040596] [2024-06-20 17:45:01,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:45:01,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 17:45:01,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:45:01,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 17:45:01,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-20 17:45:01,063 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 37 [2024-06-20 17:45:01,064 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 68 transitions, 518 flow. Second operand has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:45:01,064 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:45:01,064 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 37 [2024-06-20 17:45:01,064 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:45:01,155 INFO L124 PetriNetUnfolderBase]: 285/680 cut-off events. [2024-06-20 17:45:01,156 INFO L125 PetriNetUnfolderBase]: For 4384/4415 co-relation queries the response was YES. [2024-06-20 17:45:01,158 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2444 conditions, 680 events. 285/680 cut-off events. For 4384/4415 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 3837 event pairs, 83 based on Foata normal form. 15/691 useless extension candidates. Maximal degree in co-relation 1904. Up to 213 conditions per place. [2024-06-20 17:45:01,161 INFO L140 encePairwiseOnDemand]: 29/37 looper letters, 54 selfloop transitions, 21 changer transitions 2/91 dead transitions. [2024-06-20 17:45:01,162 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 91 transitions, 831 flow [2024-06-20 17:45:01,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:45:01,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:45:01,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 142 transitions. [2024-06-20 17:45:01,163 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6396396396396397 [2024-06-20 17:45:01,163 INFO L175 Difference]: Start difference. First operand has 79 places, 68 transitions, 518 flow. Second operand 6 states and 142 transitions. [2024-06-20 17:45:01,163 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 91 transitions, 831 flow [2024-06-20 17:45:01,172 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 91 transitions, 782 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-20 17:45:01,174 INFO L231 Difference]: Finished difference. Result has 83 places, 73 transitions, 575 flow [2024-06-20 17:45:01,174 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=473, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=575, PETRI_PLACES=83, PETRI_TRANSITIONS=73} [2024-06-20 17:45:01,175 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 45 predicate places. [2024-06-20 17:45:01,175 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 73 transitions, 575 flow [2024-06-20 17:45:01,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:45:01,175 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:45:01,176 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:45:01,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-20 17:45:01,176 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)] === [2024-06-20 17:45:01,176 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:45:01,176 INFO L85 PathProgramCache]: Analyzing trace with hash -1818101590, now seen corresponding path program 1 times [2024-06-20 17:45:01,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:45:01,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809399276] [2024-06-20 17:45:01,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:45:01,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:45:01,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:45:01,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:45:01,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:45:01,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809399276] [2024-06-20 17:45:01,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809399276] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:45:01,269 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:45:01,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 17:45:01,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748555199] [2024-06-20 17:45:01,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:45:01,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 17:45:01,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:45:01,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 17:45:01,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-20 17:45:01,300 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 37 [2024-06-20 17:45:01,300 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 73 transitions, 575 flow. Second operand has 6 states, 6 states have (on average 17.833333333333332) internal successors, (107), 6 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:45:01,300 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:45:01,301 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 37 [2024-06-20 17:45:01,301 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:45:01,406 INFO L124 PetriNetUnfolderBase]: 306/734 cut-off events. [2024-06-20 17:45:01,406 INFO L125 PetriNetUnfolderBase]: For 5537/5569 co-relation queries the response was YES. [2024-06-20 17:45:01,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2728 conditions, 734 events. 306/734 cut-off events. For 5537/5569 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 4256 event pairs, 39 based on Foata normal form. 20/747 useless extension candidates. Maximal degree in co-relation 2543. Up to 211 conditions per place. [2024-06-20 17:45:01,412 INFO L140 encePairwiseOnDemand]: 30/37 looper letters, 60 selfloop transitions, 22 changer transitions 2/98 dead transitions. [2024-06-20 17:45:01,412 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 98 transitions, 908 flow [2024-06-20 17:45:01,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:45:01,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:45:01,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 146 transitions. [2024-06-20 17:45:01,413 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6576576576576577 [2024-06-20 17:45:01,413 INFO L175 Difference]: Start difference. First operand has 83 places, 73 transitions, 575 flow. Second operand 6 states and 146 transitions. [2024-06-20 17:45:01,413 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 98 transitions, 908 flow [2024-06-20 17:45:01,420 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 98 transitions, 877 flow, removed 8 selfloop flow, removed 1 redundant places. [2024-06-20 17:45:01,422 INFO L231 Difference]: Finished difference. Result has 91 places, 76 transitions, 657 flow [2024-06-20 17:45:01,422 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=550, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=657, PETRI_PLACES=91, PETRI_TRANSITIONS=76} [2024-06-20 17:45:01,423 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 53 predicate places. [2024-06-20 17:45:01,423 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 76 transitions, 657 flow [2024-06-20 17:45:01,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.833333333333332) internal successors, (107), 6 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:45:01,423 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:45:01,423 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:45:01,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-20 17:45:01,424 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)] === [2024-06-20 17:45:01,424 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:45:01,424 INFO L85 PathProgramCache]: Analyzing trace with hash -1567078477, now seen corresponding path program 1 times [2024-06-20 17:45:01,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:45:01,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706709886] [2024-06-20 17:45:01,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:45:01,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:45:01,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:45:01,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:45:01,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:45:01,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706709886] [2024-06-20 17:45:01,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706709886] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:45:01,487 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:45:01,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:45:01,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613796917] [2024-06-20 17:45:01,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:45:01,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 17:45:01,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:45:01,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 17:45:01,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-20 17:45:01,527 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 37 [2024-06-20 17:45:01,528 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 76 transitions, 657 flow. Second operand has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:45:01,528 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:45:01,528 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 37 [2024-06-20 17:45:01,528 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:45:01,709 INFO L124 PetriNetUnfolderBase]: 521/1094 cut-off events. [2024-06-20 17:45:01,710 INFO L125 PetriNetUnfolderBase]: For 5839/5845 co-relation queries the response was YES. [2024-06-20 17:45:01,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3829 conditions, 1094 events. 521/1094 cut-off events. For 5839/5845 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 6476 event pairs, 153 based on Foata normal form. 34/1104 useless extension candidates. Maximal degree in co-relation 3275. Up to 355 conditions per place. [2024-06-20 17:45:01,719 INFO L140 encePairwiseOnDemand]: 27/37 looper letters, 61 selfloop transitions, 41 changer transitions 4/124 dead transitions. [2024-06-20 17:45:01,719 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 124 transitions, 1070 flow [2024-06-20 17:45:01,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:45:01,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:45:01,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 225 transitions. [2024-06-20 17:45:01,720 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6081081081081081 [2024-06-20 17:45:01,720 INFO L175 Difference]: Start difference. First operand has 91 places, 76 transitions, 657 flow. Second operand 10 states and 225 transitions. [2024-06-20 17:45:01,720 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 124 transitions, 1070 flow [2024-06-20 17:45:01,733 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 124 transitions, 990 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-20 17:45:01,736 INFO L231 Difference]: Finished difference. Result has 104 places, 91 transitions, 867 flow [2024-06-20 17:45:01,736 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=561, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=867, PETRI_PLACES=104, PETRI_TRANSITIONS=91} [2024-06-20 17:45:01,737 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 66 predicate places. [2024-06-20 17:45:01,737 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 91 transitions, 867 flow [2024-06-20 17:45:01,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:45:01,738 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:45:01,738 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:45:01,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-20 17:45:01,738 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)] === [2024-06-20 17:45:01,738 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:45:01,738 INFO L85 PathProgramCache]: Analyzing trace with hash -984590181, now seen corresponding path program 2 times [2024-06-20 17:45:01,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:45:01,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774157095] [2024-06-20 17:45:01,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:45:01,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:45:01,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:45:01,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:45:01,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:45:01,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774157095] [2024-06-20 17:45:01,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774157095] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:45:01,851 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:45:01,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:45:01,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312128154] [2024-06-20 17:45:01,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:45:01,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 17:45:01,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:45:01,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 17:45:01,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-20 17:45:01,896 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 37 [2024-06-20 17:45:01,897 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 91 transitions, 867 flow. Second operand has 6 states, 6 states have (on average 17.833333333333332) internal successors, (107), 6 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:45:01,897 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:45:01,897 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 37 [2024-06-20 17:45:01,897 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:45:02,005 INFO L124 PetriNetUnfolderBase]: 407/952 cut-off events. [2024-06-20 17:45:02,006 INFO L125 PetriNetUnfolderBase]: For 9421/9479 co-relation queries the response was YES. [2024-06-20 17:45:02,010 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4317 conditions, 952 events. 407/952 cut-off events. For 9421/9479 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 5945 event pairs, 104 based on Foata normal form. 17/952 useless extension candidates. Maximal degree in co-relation 3390. Up to 256 conditions per place. [2024-06-20 17:45:02,014 INFO L140 encePairwiseOnDemand]: 30/37 looper letters, 55 selfloop transitions, 32 changer transitions 0/110 dead transitions. [2024-06-20 17:45:02,014 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 110 transitions, 1240 flow [2024-06-20 17:45:02,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:45:02,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:45:02,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 138 transitions. [2024-06-20 17:45:02,016 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6216216216216216 [2024-06-20 17:45:02,016 INFO L175 Difference]: Start difference. First operand has 104 places, 91 transitions, 867 flow. Second operand 6 states and 138 transitions. [2024-06-20 17:45:02,016 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 110 transitions, 1240 flow [2024-06-20 17:45:02,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 110 transitions, 1240 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-06-20 17:45:02,031 INFO L231 Difference]: Finished difference. Result has 110 places, 96 transitions, 987 flow [2024-06-20 17:45:02,031 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=867, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=987, PETRI_PLACES=110, PETRI_TRANSITIONS=96} [2024-06-20 17:45:02,031 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 72 predicate places. [2024-06-20 17:45:02,031 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 96 transitions, 987 flow [2024-06-20 17:45:02,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.833333333333332) internal successors, (107), 6 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:45:02,032 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:45:02,032 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:45:02,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-20 17:45:02,032 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)] === [2024-06-20 17:45:02,033 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:45:02,033 INFO L85 PathProgramCache]: Analyzing trace with hash 189380091, now seen corresponding path program 3 times [2024-06-20 17:45:02,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:45:02,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503002605] [2024-06-20 17:45:02,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:45:02,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:45:02,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:45:02,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:45:02,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:45:02,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503002605] [2024-06-20 17:45:02,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503002605] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:45:02,119 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:45:02,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:45:02,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852480686] [2024-06-20 17:45:02,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:45:02,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 17:45:02,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:45:02,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 17:45:02,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-20 17:45:02,156 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 37 [2024-06-20 17:45:02,156 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 96 transitions, 987 flow. Second operand has 6 states, 6 states have (on average 17.833333333333332) internal successors, (107), 6 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:45:02,156 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:45:02,156 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 37 [2024-06-20 17:45:02,156 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:45:02,277 INFO L124 PetriNetUnfolderBase]: 405/949 cut-off events. [2024-06-20 17:45:02,278 INFO L125 PetriNetUnfolderBase]: For 10559/10617 co-relation queries the response was YES. [2024-06-20 17:45:02,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4486 conditions, 949 events. 405/949 cut-off events. For 10559/10617 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 5898 event pairs, 99 based on Foata normal form. 13/945 useless extension candidates. Maximal degree in co-relation 3526. Up to 255 conditions per place. [2024-06-20 17:45:02,285 INFO L140 encePairwiseOnDemand]: 30/37 looper letters, 54 selfloop transitions, 34 changer transitions 0/111 dead transitions. [2024-06-20 17:45:02,285 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 111 transitions, 1328 flow [2024-06-20 17:45:02,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:45:02,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:45:02,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 138 transitions. [2024-06-20 17:45:02,286 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6216216216216216 [2024-06-20 17:45:02,286 INFO L175 Difference]: Start difference. First operand has 110 places, 96 transitions, 987 flow. Second operand 6 states and 138 transitions. [2024-06-20 17:45:02,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 111 transitions, 1328 flow [2024-06-20 17:45:02,303 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 111 transitions, 1284 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-06-20 17:45:02,305 INFO L231 Difference]: Finished difference. Result has 115 places, 97 transitions, 1054 flow [2024-06-20 17:45:02,305 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=943, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1054, PETRI_PLACES=115, PETRI_TRANSITIONS=97} [2024-06-20 17:45:02,305 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 77 predicate places. [2024-06-20 17:45:02,305 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 97 transitions, 1054 flow [2024-06-20 17:45:02,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.833333333333332) internal successors, (107), 6 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:45:02,306 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:45:02,306 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:45:02,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-20 17:45:02,306 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)] === [2024-06-20 17:45:02,306 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:45:02,307 INFO L85 PathProgramCache]: Analyzing trace with hash -1360345992, now seen corresponding path program 1 times [2024-06-20 17:45:02,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:45:02,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231132375] [2024-06-20 17:45:02,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:45:02,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:45:02,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:45:02,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:45:02,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:45:02,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231132375] [2024-06-20 17:45:02,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231132375] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:45:02,393 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:45:02,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:45:02,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283420967] [2024-06-20 17:45:02,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:45:02,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 17:45:02,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:45:02,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 17:45:02,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-20 17:45:02,428 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 37 [2024-06-20 17:45:02,428 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 97 transitions, 1054 flow. Second operand has 6 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:45:02,428 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:45:02,428 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 37 [2024-06-20 17:45:02,429 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:45:02,554 INFO L124 PetriNetUnfolderBase]: 401/934 cut-off events. [2024-06-20 17:45:02,554 INFO L125 PetriNetUnfolderBase]: For 12339/12409 co-relation queries the response was YES. [2024-06-20 17:45:02,558 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4574 conditions, 934 events. 401/934 cut-off events. For 12339/12409 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 5761 event pairs, 81 based on Foata normal form. 26/937 useless extension candidates. Maximal degree in co-relation 3983. Up to 253 conditions per place. [2024-06-20 17:45:02,562 INFO L140 encePairwiseOnDemand]: 30/37 looper letters, 67 selfloop transitions, 37 changer transitions 0/127 dead transitions. [2024-06-20 17:45:02,563 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 127 transitions, 1501 flow [2024-06-20 17:45:02,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:45:02,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:45:02,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 152 transitions. [2024-06-20 17:45:02,564 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6846846846846847 [2024-06-20 17:45:02,564 INFO L175 Difference]: Start difference. First operand has 115 places, 97 transitions, 1054 flow. Second operand 6 states and 152 transitions. [2024-06-20 17:45:02,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 127 transitions, 1501 flow [2024-06-20 17:45:02,584 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 127 transitions, 1454 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-20 17:45:02,586 INFO L231 Difference]: Finished difference. Result has 121 places, 103 transitions, 1212 flow [2024-06-20 17:45:02,586 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=1014, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1212, PETRI_PLACES=121, PETRI_TRANSITIONS=103} [2024-06-20 17:45:02,586 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 83 predicate places. [2024-06-20 17:45:02,587 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 103 transitions, 1212 flow [2024-06-20 17:45:02,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:45:02,587 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:45:02,587 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:45:02,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-20 17:45:02,587 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)] === [2024-06-20 17:45:02,588 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:45:02,588 INFO L85 PathProgramCache]: Analyzing trace with hash 757279282, now seen corresponding path program 2 times [2024-06-20 17:45:02,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:45:02,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801700774] [2024-06-20 17:45:02,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:45:02,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:45:02,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:45:02,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:45:02,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:45:02,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801700774] [2024-06-20 17:45:02,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801700774] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:45:02,682 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:45:02,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:45:02,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441651053] [2024-06-20 17:45:02,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:45:02,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 17:45:02,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:45:02,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 17:45:02,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-20 17:45:02,708 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 37 [2024-06-20 17:45:02,708 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 103 transitions, 1212 flow. Second operand has 6 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:45:02,708 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:45:02,708 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 37 [2024-06-20 17:45:02,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:45:02,845 INFO L124 PetriNetUnfolderBase]: 406/937 cut-off events. [2024-06-20 17:45:02,846 INFO L125 PetriNetUnfolderBase]: For 14444/14538 co-relation queries the response was YES. [2024-06-20 17:45:02,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4916 conditions, 937 events. 406/937 cut-off events. For 14444/14538 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 5751 event pairs, 86 based on Foata normal form. 36/948 useless extension candidates. Maximal degree in co-relation 4340. Up to 259 conditions per place. [2024-06-20 17:45:02,854 INFO L140 encePairwiseOnDemand]: 30/37 looper letters, 69 selfloop transitions, 33 changer transitions 0/125 dead transitions. [2024-06-20 17:45:02,854 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 125 transitions, 1579 flow [2024-06-20 17:45:02,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:45:02,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:45:02,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 146 transitions. [2024-06-20 17:45:02,855 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6576576576576577 [2024-06-20 17:45:02,855 INFO L175 Difference]: Start difference. First operand has 121 places, 103 transitions, 1212 flow. Second operand 6 states and 146 transitions. [2024-06-20 17:45:02,855 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 125 transitions, 1579 flow [2024-06-20 17:45:02,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 125 transitions, 1493 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-20 17:45:02,882 INFO L231 Difference]: Finished difference. Result has 124 places, 106 transitions, 1252 flow [2024-06-20 17:45:02,882 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=1134, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1252, PETRI_PLACES=124, PETRI_TRANSITIONS=106} [2024-06-20 17:45:02,883 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 86 predicate places. [2024-06-20 17:45:02,883 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 106 transitions, 1252 flow [2024-06-20 17:45:02,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:45:02,883 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:45:02,883 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:45:02,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-20 17:45:02,883 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)] === [2024-06-20 17:45:02,884 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:45:02,884 INFO L85 PathProgramCache]: Analyzing trace with hash 384132592, now seen corresponding path program 3 times [2024-06-20 17:45:02,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:45:02,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114962999] [2024-06-20 17:45:02,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:45:02,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:45:02,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:45:02,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:45:02,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:45:02,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114962999] [2024-06-20 17:45:02,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114962999] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:45:02,929 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:45:02,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:45:02,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939352259] [2024-06-20 17:45:02,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:45:02,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 17:45:02,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:45:02,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 17:45:02,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-20 17:45:02,960 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 37 [2024-06-20 17:45:02,960 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 106 transitions, 1252 flow. Second operand has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:45:02,960 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:45:02,961 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 37 [2024-06-20 17:45:02,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:45:03,171 INFO L124 PetriNetUnfolderBase]: 548/1180 cut-off events. [2024-06-20 17:45:03,171 INFO L125 PetriNetUnfolderBase]: For 13277/13373 co-relation queries the response was YES. [2024-06-20 17:45:03,176 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5618 conditions, 1180 events. 548/1180 cut-off events. For 13277/13373 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 7368 event pairs, 106 based on Foata normal form. 17/1135 useless extension candidates. Maximal degree in co-relation 5383. Up to 458 conditions per place. [2024-06-20 17:45:03,187 INFO L140 encePairwiseOnDemand]: 28/37 looper letters, 66 selfloop transitions, 40 changer transitions 0/147 dead transitions. [2024-06-20 17:45:03,187 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 147 transitions, 1672 flow [2024-06-20 17:45:03,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:45:03,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:45:03,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 185 transitions. [2024-06-20 17:45:03,189 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-20 17:45:03,189 INFO L175 Difference]: Start difference. First operand has 124 places, 106 transitions, 1252 flow. Second operand 8 states and 185 transitions. [2024-06-20 17:45:03,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 147 transitions, 1672 flow [2024-06-20 17:45:03,216 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 147 transitions, 1614 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-06-20 17:45:03,219 INFO L231 Difference]: Finished difference. Result has 133 places, 121 transitions, 1432 flow [2024-06-20 17:45:03,219 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=1204, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1432, PETRI_PLACES=133, PETRI_TRANSITIONS=121} [2024-06-20 17:45:03,219 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 95 predicate places. [2024-06-20 17:45:03,220 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 121 transitions, 1432 flow [2024-06-20 17:45:03,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:45:03,220 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:45:03,220 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:45:03,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-20 17:45:03,221 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)] === [2024-06-20 17:45:03,221 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:45:03,221 INFO L85 PathProgramCache]: Analyzing trace with hash -1800666786, now seen corresponding path program 4 times [2024-06-20 17:45:03,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:45:03,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107301090] [2024-06-20 17:45:03,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:45:03,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:45:03,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:45:03,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:45:03,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:45:03,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107301090] [2024-06-20 17:45:03,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107301090] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:45:03,315 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:45:03,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:45:03,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015310468] [2024-06-20 17:45:03,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:45:03,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 17:45:03,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:45:03,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 17:45:03,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-20 17:45:03,352 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 37 [2024-06-20 17:45:03,352 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 121 transitions, 1432 flow. Second operand has 6 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:45:03,352 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:45:03,352 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 37 [2024-06-20 17:45:03,352 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:45:03,479 INFO L124 PetriNetUnfolderBase]: 450/1045 cut-off events. [2024-06-20 17:45:03,479 INFO L125 PetriNetUnfolderBase]: For 15902/15994 co-relation queries the response was YES. [2024-06-20 17:45:03,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5538 conditions, 1045 events. 450/1045 cut-off events. For 15902/15994 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 6711 event pairs, 132 based on Foata normal form. 20/1039 useless extension candidates. Maximal degree in co-relation 5136. Up to 372 conditions per place. [2024-06-20 17:45:03,490 INFO L140 encePairwiseOnDemand]: 31/37 looper letters, 68 selfloop transitions, 34 changer transitions 0/134 dead transitions. [2024-06-20 17:45:03,490 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 134 transitions, 1711 flow [2024-06-20 17:45:03,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:45:03,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:45:03,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 138 transitions. [2024-06-20 17:45:03,491 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6216216216216216 [2024-06-20 17:45:03,491 INFO L175 Difference]: Start difference. First operand has 133 places, 121 transitions, 1432 flow. Second operand 6 states and 138 transitions. [2024-06-20 17:45:03,492 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 134 transitions, 1711 flow [2024-06-20 17:45:03,522 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 134 transitions, 1711 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-06-20 17:45:03,524 INFO L231 Difference]: Finished difference. Result has 140 places, 122 transitions, 1530 flow [2024-06-20 17:45:03,524 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=1432, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1530, PETRI_PLACES=140, PETRI_TRANSITIONS=122} [2024-06-20 17:45:03,525 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 102 predicate places. [2024-06-20 17:45:03,525 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 122 transitions, 1530 flow [2024-06-20 17:45:03,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:45:03,525 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:45:03,525 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:45:03,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-20 17:45:03,525 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)] === [2024-06-20 17:45:03,526 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:45:03,526 INFO L85 PathProgramCache]: Analyzing trace with hash 1196624734, now seen corresponding path program 5 times [2024-06-20 17:45:03,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:45:03,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756434643] [2024-06-20 17:45:03,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:45:03,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:45:03,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:45:03,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:45:03,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:45:03,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756434643] [2024-06-20 17:45:03,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756434643] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:45:03,581 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:45:03,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:45:03,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648563380] [2024-06-20 17:45:03,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:45:03,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 17:45:03,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:45:03,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 17:45:03,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-20 17:45:03,609 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 37 [2024-06-20 17:45:03,610 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 122 transitions, 1530 flow. Second operand has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:45:03,610 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:45:03,610 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 37 [2024-06-20 17:45:03,610 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:45:03,787 INFO L124 PetriNetUnfolderBase]: 464/1063 cut-off events. [2024-06-20 17:45:03,788 INFO L125 PetriNetUnfolderBase]: For 10080/10107 co-relation queries the response was YES. [2024-06-20 17:45:03,792 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4964 conditions, 1063 events. 464/1063 cut-off events. For 10080/10107 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 6627 event pairs, 112 based on Foata normal form. 38/1079 useless extension candidates. Maximal degree in co-relation 4535. Up to 247 conditions per place. [2024-06-20 17:45:03,796 INFO L140 encePairwiseOnDemand]: 27/37 looper letters, 69 selfloop transitions, 45 changer transitions 0/149 dead transitions. [2024-06-20 17:45:03,796 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 149 transitions, 1817 flow [2024-06-20 17:45:03,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:45:03,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:45:03,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 216 transitions. [2024-06-20 17:45:03,799 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5837837837837838 [2024-06-20 17:45:03,799 INFO L175 Difference]: Start difference. First operand has 140 places, 122 transitions, 1530 flow. Second operand 10 states and 216 transitions. [2024-06-20 17:45:03,799 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 149 transitions, 1817 flow [2024-06-20 17:45:03,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 149 transitions, 1705 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-20 17:45:03,831 INFO L231 Difference]: Finished difference. Result has 151 places, 123 transitions, 1555 flow [2024-06-20 17:45:03,831 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=1237, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1555, PETRI_PLACES=151, PETRI_TRANSITIONS=123} [2024-06-20 17:45:03,831 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 113 predicate places. [2024-06-20 17:45:03,831 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 123 transitions, 1555 flow [2024-06-20 17:45:03,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:45:03,833 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:45:03,833 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:45:03,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-20 17:45:03,833 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)] === [2024-06-20 17:45:03,833 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:45:03,833 INFO L85 PathProgramCache]: Analyzing trace with hash -1648641746, now seen corresponding path program 1 times [2024-06-20 17:45:03,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:45:03,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390080094] [2024-06-20 17:45:03,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:45:03,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:45:03,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:45:03,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:45:03,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:45:03,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390080094] [2024-06-20 17:45:03,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390080094] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:45:03,929 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:45:03,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:45:03,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965808199] [2024-06-20 17:45:03,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:45:03,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 17:45:03,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:45:03,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 17:45:03,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-20 17:45:03,969 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 37 [2024-06-20 17:45:03,969 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 123 transitions, 1555 flow. Second operand has 6 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:45:03,970 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:45:03,970 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 37 [2024-06-20 17:45:03,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:45:04,112 INFO L124 PetriNetUnfolderBase]: 367/943 cut-off events. [2024-06-20 17:45:04,113 INFO L125 PetriNetUnfolderBase]: For 13724/13768 co-relation queries the response was YES. [2024-06-20 17:45:04,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4979 conditions, 943 events. 367/943 cut-off events. For 13724/13768 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 6261 event pairs, 122 based on Foata normal form. 14/942 useless extension candidates. Maximal degree in co-relation 4558. Up to 269 conditions per place. [2024-06-20 17:45:04,119 INFO L140 encePairwiseOnDemand]: 29/37 looper letters, 64 selfloop transitions, 33 changer transitions 0/136 dead transitions. [2024-06-20 17:45:04,119 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 136 transitions, 1847 flow [2024-06-20 17:45:04,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:45:04,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:45:04,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 134 transitions. [2024-06-20 17:45:04,120 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6036036036036037 [2024-06-20 17:45:04,120 INFO L175 Difference]: Start difference. First operand has 151 places, 123 transitions, 1555 flow. Second operand 6 states and 134 transitions. [2024-06-20 17:45:04,120 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 136 transitions, 1847 flow [2024-06-20 17:45:04,153 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 136 transitions, 1790 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-20 17:45:04,155 INFO L231 Difference]: Finished difference. Result has 155 places, 126 transitions, 1606 flow [2024-06-20 17:45:04,155 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=1501, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1606, PETRI_PLACES=155, PETRI_TRANSITIONS=126} [2024-06-20 17:45:04,155 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 117 predicate places. [2024-06-20 17:45:04,155 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 126 transitions, 1606 flow [2024-06-20 17:45:04,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:45:04,156 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:45:04,156 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:45:04,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-20 17:45:04,156 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)] === [2024-06-20 17:45:04,156 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:45:04,156 INFO L85 PathProgramCache]: Analyzing trace with hash 742248786, now seen corresponding path program 2 times [2024-06-20 17:45:04,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:45:04,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246977212] [2024-06-20 17:45:04,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:45:04,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:45:04,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:45:04,236 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:45:04,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:45:04,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246977212] [2024-06-20 17:45:04,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246977212] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:45:04,237 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:45:04,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:45:04,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200057197] [2024-06-20 17:45:04,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:45:04,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 17:45:04,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:45:04,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 17:45:04,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-20 17:45:04,280 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 37 [2024-06-20 17:45:04,280 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 126 transitions, 1606 flow. Second operand has 6 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:45:04,280 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:45:04,280 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 37 [2024-06-20 17:45:04,281 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:45:04,406 INFO L124 PetriNetUnfolderBase]: 373/950 cut-off events. [2024-06-20 17:45:04,406 INFO L125 PetriNetUnfolderBase]: For 14705/14757 co-relation queries the response was YES. [2024-06-20 17:45:04,410 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5085 conditions, 950 events. 373/950 cut-off events. For 14705/14757 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 6269 event pairs, 121 based on Foata normal form. 19/949 useless extension candidates. Maximal degree in co-relation 4676. Up to 270 conditions per place. [2024-06-20 17:45:04,414 INFO L140 encePairwiseOnDemand]: 29/37 looper letters, 59 selfloop transitions, 39 changer transitions 0/137 dead transitions. [2024-06-20 17:45:04,414 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 137 transitions, 1939 flow [2024-06-20 17:45:04,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:45:04,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:45:04,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 135 transitions. [2024-06-20 17:45:04,415 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6081081081081081 [2024-06-20 17:45:04,415 INFO L175 Difference]: Start difference. First operand has 155 places, 126 transitions, 1606 flow. Second operand 6 states and 135 transitions. [2024-06-20 17:45:04,415 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 137 transitions, 1939 flow [2024-06-20 17:45:04,456 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 137 transitions, 1890 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-20 17:45:04,458 INFO L231 Difference]: Finished difference. Result has 158 places, 129 transitions, 1674 flow [2024-06-20 17:45:04,458 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=1557, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1674, PETRI_PLACES=158, PETRI_TRANSITIONS=129} [2024-06-20 17:45:04,458 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 120 predicate places. [2024-06-20 17:45:04,458 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 129 transitions, 1674 flow [2024-06-20 17:45:04,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:45:04,459 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:45:04,459 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:45:04,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-20 17:45:04,459 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)] === [2024-06-20 17:45:04,459 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:45:04,460 INFO L85 PathProgramCache]: Analyzing trace with hash -1760819332, now seen corresponding path program 3 times [2024-06-20 17:45:04,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:45:04,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868988113] [2024-06-20 17:45:04,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:45:04,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:45:04,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:45:04,547 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:45:04,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:45:04,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868988113] [2024-06-20 17:45:04,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868988113] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:45:04,548 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:45:04,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:45:04,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415024536] [2024-06-20 17:45:04,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:45:04,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 17:45:04,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:45:04,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 17:45:04,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-20 17:45:04,583 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 37 [2024-06-20 17:45:04,583 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 129 transitions, 1674 flow. Second operand has 6 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:45:04,584 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:45:04,584 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 37 [2024-06-20 17:45:04,584 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:45:04,712 INFO L124 PetriNetUnfolderBase]: 377/956 cut-off events. [2024-06-20 17:45:04,712 INFO L125 PetriNetUnfolderBase]: For 15885/15933 co-relation queries the response was YES. [2024-06-20 17:45:04,717 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5220 conditions, 956 events. 377/956 cut-off events. For 15885/15933 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 6298 event pairs, 121 based on Foata normal form. 17/953 useless extension candidates. Maximal degree in co-relation 4812. Up to 278 conditions per place. [2024-06-20 17:45:04,720 INFO L140 encePairwiseOnDemand]: 30/37 looper letters, 68 selfloop transitions, 33 changer transitions 0/140 dead transitions. [2024-06-20 17:45:04,720 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 140 transitions, 2023 flow [2024-06-20 17:45:04,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:45:04,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:45:04,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 134 transitions. [2024-06-20 17:45:04,721 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6036036036036037 [2024-06-20 17:45:04,721 INFO L175 Difference]: Start difference. First operand has 158 places, 129 transitions, 1674 flow. Second operand 6 states and 134 transitions. [2024-06-20 17:45:04,722 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 140 transitions, 2023 flow [2024-06-20 17:45:04,767 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 140 transitions, 1968 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-06-20 17:45:04,770 INFO L231 Difference]: Finished difference. Result has 162 places, 132 transitions, 1730 flow [2024-06-20 17:45:04,770 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=1622, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1730, PETRI_PLACES=162, PETRI_TRANSITIONS=132} [2024-06-20 17:45:04,770 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 124 predicate places. [2024-06-20 17:45:04,771 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 132 transitions, 1730 flow [2024-06-20 17:45:04,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:45:04,771 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:45:04,771 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:45:04,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-20 17:45:04,771 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)] === [2024-06-20 17:45:04,772 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:45:04,772 INFO L85 PathProgramCache]: Analyzing trace with hash 334736203, now seen corresponding path program 1 times [2024-06-20 17:45:04,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:45:04,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055225390] [2024-06-20 17:45:04,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:45:04,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:45:04,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:45:04,809 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:45:04,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:45:04,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055225390] [2024-06-20 17:45:04,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055225390] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:45:04,809 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:45:04,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:45:04,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978155364] [2024-06-20 17:45:04,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:45:04,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 17:45:04,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:45:04,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 17:45:04,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-20 17:45:04,846 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 37 [2024-06-20 17:45:04,847 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 132 transitions, 1730 flow. Second operand has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:45:04,847 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:45:04,847 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 37 [2024-06-20 17:45:04,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:45:05,043 INFO L124 PetriNetUnfolderBase]: 535/1193 cut-off events. [2024-06-20 17:45:05,043 INFO L125 PetriNetUnfolderBase]: For 13548/13577 co-relation queries the response was YES. [2024-06-20 17:45:05,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5967 conditions, 1193 events. 535/1193 cut-off events. For 13548/13577 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 7644 event pairs, 124 based on Foata normal form. 10/1177 useless extension candidates. Maximal degree in co-relation 5694. Up to 437 conditions per place. [2024-06-20 17:45:05,082 INFO L140 encePairwiseOnDemand]: 27/37 looper letters, 71 selfloop transitions, 51 changer transitions 0/172 dead transitions. [2024-06-20 17:45:05,082 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 172 transitions, 2186 flow [2024-06-20 17:45:05,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:45:05,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:45:05,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 183 transitions. [2024-06-20 17:45:05,097 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6182432432432432 [2024-06-20 17:45:05,097 INFO L175 Difference]: Start difference. First operand has 162 places, 132 transitions, 1730 flow. Second operand 8 states and 183 transitions. [2024-06-20 17:45:05,097 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 172 transitions, 2186 flow [2024-06-20 17:45:05,145 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 172 transitions, 2124 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-20 17:45:05,147 INFO L231 Difference]: Finished difference. Result has 172 places, 144 transitions, 1986 flow [2024-06-20 17:45:05,147 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=1669, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1986, PETRI_PLACES=172, PETRI_TRANSITIONS=144} [2024-06-20 17:45:05,148 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 134 predicate places. [2024-06-20 17:45:05,148 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 144 transitions, 1986 flow [2024-06-20 17:45:05,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:45:05,148 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:45:05,148 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:45:05,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-20 17:45:05,149 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)] === [2024-06-20 17:45:05,149 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:45:05,149 INFO L85 PathProgramCache]: Analyzing trace with hash -457523133, now seen corresponding path program 2 times [2024-06-20 17:45:05,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:45:05,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594040356] [2024-06-20 17:45:05,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:45:05,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:45:05,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:45:05,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:45:05,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:45:05,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594040356] [2024-06-20 17:45:05,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594040356] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:45:05,238 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:45:05,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:45:05,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202950110] [2024-06-20 17:45:05,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:45:05,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 17:45:05,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:45:05,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 17:45:05,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-20 17:45:05,278 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 37 [2024-06-20 17:45:05,279 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 144 transitions, 1986 flow. Second operand has 6 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:45:05,279 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:45:05,279 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 37 [2024-06-20 17:45:05,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:45:05,438 INFO L124 PetriNetUnfolderBase]: 391/985 cut-off events. [2024-06-20 17:45:05,439 INFO L125 PetriNetUnfolderBase]: For 19545/19591 co-relation queries the response was YES. [2024-06-20 17:45:05,444 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5843 conditions, 985 events. 391/985 cut-off events. For 19545/19591 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 6512 event pairs, 89 based on Foata normal form. 8/970 useless extension candidates. Maximal degree in co-relation 5551. Up to 287 conditions per place. [2024-06-20 17:45:05,447 INFO L140 encePairwiseOnDemand]: 30/37 looper letters, 71 selfloop transitions, 41 changer transitions 0/161 dead transitions. [2024-06-20 17:45:05,448 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 161 transitions, 2351 flow [2024-06-20 17:45:05,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:45:05,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:45:05,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 143 transitions. [2024-06-20 17:45:05,449 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6441441441441441 [2024-06-20 17:45:05,449 INFO L175 Difference]: Start difference. First operand has 172 places, 144 transitions, 1986 flow. Second operand 6 states and 143 transitions. [2024-06-20 17:45:05,449 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 161 transitions, 2351 flow [2024-06-20 17:45:05,509 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 161 transitions, 2317 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-06-20 17:45:05,511 INFO L231 Difference]: Finished difference. Result has 177 places, 145 transitions, 2055 flow [2024-06-20 17:45:05,511 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=1953, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2055, PETRI_PLACES=177, PETRI_TRANSITIONS=145} [2024-06-20 17:45:05,512 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 139 predicate places. [2024-06-20 17:45:05,512 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 145 transitions, 2055 flow [2024-06-20 17:45:05,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:45:05,512 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:45:05,512 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:45:05,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-20 17:45:05,513 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)] === [2024-06-20 17:45:05,513 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:45:05,513 INFO L85 PathProgramCache]: Analyzing trace with hash 1996811943, now seen corresponding path program 3 times [2024-06-20 17:45:05,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:45:05,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250419708] [2024-06-20 17:45:05,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:45:05,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:45:05,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:45:05,589 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:45:05,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:45:05,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250419708] [2024-06-20 17:45:05,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250419708] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:45:05,590 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:45:05,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:45:05,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80931904] [2024-06-20 17:45:05,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:45:05,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 17:45:05,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:45:05,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 17:45:05,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-20 17:45:05,633 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 37 [2024-06-20 17:45:05,634 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 145 transitions, 2055 flow. Second operand has 6 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:45:05,634 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:45:05,634 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 37 [2024-06-20 17:45:05,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:45:05,790 INFO L124 PetriNetUnfolderBase]: 397/997 cut-off events. [2024-06-20 17:45:05,790 INFO L125 PetriNetUnfolderBase]: For 21132/21180 co-relation queries the response was YES. [2024-06-20 17:45:05,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6022 conditions, 997 events. 397/997 cut-off events. For 21132/21180 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 6594 event pairs, 67 based on Foata normal form. 10/984 useless extension candidates. Maximal degree in co-relation 5607. Up to 291 conditions per place. [2024-06-20 17:45:05,798 INFO L140 encePairwiseOnDemand]: 30/37 looper letters, 67 selfloop transitions, 45 changer transitions 0/161 dead transitions. [2024-06-20 17:45:05,798 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 161 transitions, 2467 flow [2024-06-20 17:45:05,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:45:05,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:45:05,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 140 transitions. [2024-06-20 17:45:05,799 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6306306306306306 [2024-06-20 17:45:05,799 INFO L175 Difference]: Start difference. First operand has 177 places, 145 transitions, 2055 flow. Second operand 6 states and 140 transitions. [2024-06-20 17:45:05,800 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 161 transitions, 2467 flow [2024-06-20 17:45:05,861 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 161 transitions, 2403 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-20 17:45:05,863 INFO L231 Difference]: Finished difference. Result has 180 places, 146 transitions, 2103 flow [2024-06-20 17:45:05,864 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=1992, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2103, PETRI_PLACES=180, PETRI_TRANSITIONS=146} [2024-06-20 17:45:05,867 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 142 predicate places. [2024-06-20 17:45:05,867 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 146 transitions, 2103 flow [2024-06-20 17:45:05,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:45:05,867 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:45:05,868 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:45:05,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-20 17:45:05,868 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)] === [2024-06-20 17:45:05,868 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:45:05,868 INFO L85 PathProgramCache]: Analyzing trace with hash 1996902153, now seen corresponding path program 4 times [2024-06-20 17:45:05,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:45:05,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793069676] [2024-06-20 17:45:05,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:45:05,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:45:05,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:45:05,965 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:45:05,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:45:05,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793069676] [2024-06-20 17:45:05,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793069676] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:45:05,966 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:45:05,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:45:05,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839747869] [2024-06-20 17:45:05,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:45:05,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 17:45:05,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:45:05,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 17:45:05,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-20 17:45:06,012 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 37 [2024-06-20 17:45:06,013 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 146 transitions, 2103 flow. Second operand has 6 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:45:06,013 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:45:06,013 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 37 [2024-06-20 17:45:06,013 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:45:06,143 INFO L124 PetriNetUnfolderBase]: 394/992 cut-off events. [2024-06-20 17:45:06,144 INFO L125 PetriNetUnfolderBase]: For 22038/22086 co-relation queries the response was YES. [2024-06-20 17:45:06,148 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6034 conditions, 992 events. 394/992 cut-off events. For 22038/22086 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 6572 event pairs, 64 based on Foata normal form. 10/979 useless extension candidates. Maximal degree in co-relation 5618. Up to 289 conditions per place. [2024-06-20 17:45:06,152 INFO L140 encePairwiseOnDemand]: 30/37 looper letters, 69 selfloop transitions, 42 changer transitions 0/160 dead transitions. [2024-06-20 17:45:06,152 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 160 transitions, 2451 flow [2024-06-20 17:45:06,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:45:06,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:45:06,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 139 transitions. [2024-06-20 17:45:06,153 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6261261261261262 [2024-06-20 17:45:06,153 INFO L175 Difference]: Start difference. First operand has 180 places, 146 transitions, 2103 flow. Second operand 6 states and 139 transitions. [2024-06-20 17:45:06,153 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 160 transitions, 2451 flow [2024-06-20 17:45:06,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 160 transitions, 2341 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-20 17:45:06,211 INFO L231 Difference]: Finished difference. Result has 182 places, 146 transitions, 2081 flow [2024-06-20 17:45:06,211 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=1993, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2081, PETRI_PLACES=182, PETRI_TRANSITIONS=146} [2024-06-20 17:45:06,212 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 144 predicate places. [2024-06-20 17:45:06,212 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 146 transitions, 2081 flow [2024-06-20 17:45:06,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:45:06,213 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:45:06,213 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:45:06,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-20 17:45:06,213 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)] === [2024-06-20 17:45:06,213 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:45:06,213 INFO L85 PathProgramCache]: Analyzing trace with hash 1996902308, now seen corresponding path program 4 times [2024-06-20 17:45:06,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:45:06,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697785085] [2024-06-20 17:45:06,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:45:06,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:45:06,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:45:06,295 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:45:06,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:45:06,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697785085] [2024-06-20 17:45:06,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697785085] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:45:06,295 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:45:06,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:45:06,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805644877] [2024-06-20 17:45:06,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:45:06,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 17:45:06,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:45:06,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 17:45:06,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-20 17:45:06,325 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 37 [2024-06-20 17:45:06,326 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 146 transitions, 2081 flow. Second operand has 6 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:45:06,326 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:45:06,326 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 37 [2024-06-20 17:45:06,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:45:06,465 INFO L124 PetriNetUnfolderBase]: 400/1019 cut-off events. [2024-06-20 17:45:06,466 INFO L125 PetriNetUnfolderBase]: For 22291/22325 co-relation queries the response was YES. [2024-06-20 17:45:06,471 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6091 conditions, 1019 events. 400/1019 cut-off events. For 22291/22325 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 6836 event pairs, 111 based on Foata normal form. 13/1014 useless extension candidates. Maximal degree in co-relation 5613. Up to 285 conditions per place. [2024-06-20 17:45:06,475 INFO L140 encePairwiseOnDemand]: 31/37 looper letters, 73 selfloop transitions, 32 changer transitions 0/154 dead transitions. [2024-06-20 17:45:06,475 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 154 transitions, 2407 flow [2024-06-20 17:45:06,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:45:06,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:45:06,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 131 transitions. [2024-06-20 17:45:06,476 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5900900900900901 [2024-06-20 17:45:06,476 INFO L175 Difference]: Start difference. First operand has 182 places, 146 transitions, 2081 flow. Second operand 6 states and 131 transitions. [2024-06-20 17:45:06,477 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 154 transitions, 2407 flow [2024-06-20 17:45:06,535 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 154 transitions, 2281 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-20 17:45:06,538 INFO L231 Difference]: Finished difference. Result has 182 places, 146 transitions, 2025 flow [2024-06-20 17:45:06,538 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=1955, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2025, PETRI_PLACES=182, PETRI_TRANSITIONS=146} [2024-06-20 17:45:06,539 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 144 predicate places. [2024-06-20 17:45:06,539 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 146 transitions, 2025 flow [2024-06-20 17:45:06,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:45:06,539 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:45:06,539 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:45:06,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-20 17:45:06,540 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)] === [2024-06-20 17:45:06,540 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:45:06,540 INFO L85 PathProgramCache]: Analyzing trace with hash 778948428, now seen corresponding path program 1 times [2024-06-20 17:45:06,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:45:06,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828084030] [2024-06-20 17:45:06,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:45:06,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:45:06,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:45:06,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:45:06,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:45:06,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828084030] [2024-06-20 17:45:06,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828084030] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:45:06,620 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:45:06,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:45:06,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640135018] [2024-06-20 17:45:06,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:45:06,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 17:45:06,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:45:06,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 17:45:06,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-20 17:45:06,646 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 37 [2024-06-20 17:45:06,646 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 146 transitions, 2025 flow. Second operand has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:45:06,647 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:45:06,647 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 37 [2024-06-20 17:45:06,647 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:45:06,780 INFO L124 PetriNetUnfolderBase]: 399/1022 cut-off events. [2024-06-20 17:45:06,781 INFO L125 PetriNetUnfolderBase]: For 21403/21425 co-relation queries the response was YES. [2024-06-20 17:45:06,786 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5985 conditions, 1022 events. 399/1022 cut-off events. For 21403/21425 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 6864 event pairs, 50 based on Foata normal form. 10/1020 useless extension candidates. Maximal degree in co-relation 5505. Up to 213 conditions per place. [2024-06-20 17:45:06,790 INFO L140 encePairwiseOnDemand]: 29/37 looper letters, 80 selfloop transitions, 25 changer transitions 6/160 dead transitions. [2024-06-20 17:45:06,790 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 160 transitions, 2381 flow [2024-06-20 17:45:06,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:45:06,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:45:06,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 138 transitions. [2024-06-20 17:45:06,791 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6216216216216216 [2024-06-20 17:45:06,791 INFO L175 Difference]: Start difference. First operand has 182 places, 146 transitions, 2025 flow. Second operand 6 states and 138 transitions. [2024-06-20 17:45:06,791 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 160 transitions, 2381 flow [2024-06-20 17:45:06,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 160 transitions, 2264 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-20 17:45:06,850 INFO L231 Difference]: Finished difference. Result has 181 places, 142 transitions, 1887 flow [2024-06-20 17:45:06,850 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=1908, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1887, PETRI_PLACES=181, PETRI_TRANSITIONS=142} [2024-06-20 17:45:06,851 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 143 predicate places. [2024-06-20 17:45:06,851 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 142 transitions, 1887 flow [2024-06-20 17:45:06,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:45:06,851 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:45:06,851 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:45:06,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-20 17:45:06,852 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)] === [2024-06-20 17:45:06,852 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:45:06,852 INFO L85 PathProgramCache]: Analyzing trace with hash -519933242, now seen corresponding path program 2 times [2024-06-20 17:45:06,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:45:06,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636642156] [2024-06-20 17:45:06,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:45:06,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:45:06,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:45:06,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:45:06,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:45:06,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636642156] [2024-06-20 17:45:06,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636642156] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:45:06,939 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:45:06,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:45:06,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796754446] [2024-06-20 17:45:06,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:45:06,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 17:45:06,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:45:06,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 17:45:06,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-20 17:45:06,985 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 37 [2024-06-20 17:45:06,985 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 142 transitions, 1887 flow. Second operand has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:45:06,986 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:45:06,986 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 37 [2024-06-20 17:45:06,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:45:07,114 INFO L124 PetriNetUnfolderBase]: 368/943 cut-off events. [2024-06-20 17:45:07,114 INFO L125 PetriNetUnfolderBase]: For 20991/21010 co-relation queries the response was YES. [2024-06-20 17:45:07,119 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5520 conditions, 943 events. 368/943 cut-off events. For 20991/21010 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 6175 event pairs, 41 based on Foata normal form. 10/940 useless extension candidates. Maximal degree in co-relation 5050. Up to 199 conditions per place. [2024-06-20 17:45:07,123 INFO L140 encePairwiseOnDemand]: 30/37 looper letters, 79 selfloop transitions, 24 changer transitions 0/152 dead transitions. [2024-06-20 17:45:07,123 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 152 transitions, 2221 flow [2024-06-20 17:45:07,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:45:07,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:45:07,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 134 transitions. [2024-06-20 17:45:07,124 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6036036036036037 [2024-06-20 17:45:07,124 INFO L175 Difference]: Start difference. First operand has 181 places, 142 transitions, 1887 flow. Second operand 6 states and 134 transitions. [2024-06-20 17:45:07,124 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 152 transitions, 2221 flow [2024-06-20 17:45:07,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 152 transitions, 2142 flow, removed 8 selfloop flow, removed 10 redundant places. [2024-06-20 17:45:07,173 INFO L231 Difference]: Finished difference. Result has 176 places, 142 transitions, 1869 flow [2024-06-20 17:45:07,174 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=1816, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1869, PETRI_PLACES=176, PETRI_TRANSITIONS=142} [2024-06-20 17:45:07,175 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 138 predicate places. [2024-06-20 17:45:07,175 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 142 transitions, 1869 flow [2024-06-20 17:45:07,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:45:07,175 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:45:07,175 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:45:07,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-20 17:45:07,175 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)] === [2024-06-20 17:45:07,176 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:45:07,176 INFO L85 PathProgramCache]: Analyzing trace with hash 1093900368, now seen corresponding path program 3 times [2024-06-20 17:45:07,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:45:07,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772459345] [2024-06-20 17:45:07,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:45:07,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:45:07,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:45:07,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:45:07,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:45:07,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772459345] [2024-06-20 17:45:07,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772459345] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:45:07,253 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:45:07,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:45:07,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196364424] [2024-06-20 17:45:07,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:45:07,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 17:45:07,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:45:07,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 17:45:07,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-20 17:45:07,281 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 37 [2024-06-20 17:45:07,282 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 142 transitions, 1869 flow. Second operand has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:45:07,282 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:45:07,282 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 37 [2024-06-20 17:45:07,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:45:07,391 INFO L124 PetriNetUnfolderBase]: 362/929 cut-off events. [2024-06-20 17:45:07,392 INFO L125 PetriNetUnfolderBase]: For 19007/19023 co-relation queries the response was YES. [2024-06-20 17:45:07,396 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5226 conditions, 929 events. 362/929 cut-off events. For 19007/19023 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 6053 event pairs, 39 based on Foata normal form. 16/933 useless extension candidates. Maximal degree in co-relation 4819. Up to 197 conditions per place. [2024-06-20 17:45:07,399 INFO L140 encePairwiseOnDemand]: 29/37 looper letters, 56 selfloop transitions, 47 changer transitions 0/152 dead transitions. [2024-06-20 17:45:07,400 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 152 transitions, 2147 flow [2024-06-20 17:45:07,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:45:07,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:45:07,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 137 transitions. [2024-06-20 17:45:07,401 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6171171171171171 [2024-06-20 17:45:07,401 INFO L175 Difference]: Start difference. First operand has 176 places, 142 transitions, 1869 flow. Second operand 6 states and 137 transitions. [2024-06-20 17:45:07,401 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 152 transitions, 2147 flow [2024-06-20 17:45:07,441 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 152 transitions, 2040 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-20 17:45:07,444 INFO L231 Difference]: Finished difference. Result has 174 places, 142 transitions, 1865 flow [2024-06-20 17:45:07,445 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=1762, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1865, PETRI_PLACES=174, PETRI_TRANSITIONS=142} [2024-06-20 17:45:07,445 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 136 predicate places. [2024-06-20 17:45:07,445 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 142 transitions, 1865 flow [2024-06-20 17:45:07,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:45:07,445 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:45:07,445 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:45:07,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-20 17:45:07,446 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)] === [2024-06-20 17:45:07,446 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:45:07,446 INFO L85 PathProgramCache]: Analyzing trace with hash 431714832, now seen corresponding path program 1 times [2024-06-20 17:45:07,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:45:07,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387731389] [2024-06-20 17:45:07,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:45:07,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:45:07,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:45:07,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:45:07,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:45:07,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387731389] [2024-06-20 17:45:07,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387731389] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:45:07,555 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:45:07,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:45:07,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972313011] [2024-06-20 17:45:07,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:45:07,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 17:45:07,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:45:07,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 17:45:07,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-20 17:45:07,590 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 37 [2024-06-20 17:45:07,590 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 142 transitions, 1865 flow. Second operand has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:45:07,591 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:45:07,591 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 37 [2024-06-20 17:45:07,591 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:45:07,735 INFO L124 PetriNetUnfolderBase]: 372/968 cut-off events. [2024-06-20 17:45:07,736 INFO L125 PetriNetUnfolderBase]: For 20159/20174 co-relation queries the response was YES. [2024-06-20 17:45:07,741 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5342 conditions, 968 events. 372/968 cut-off events. For 20159/20174 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 6474 event pairs, 77 based on Foata normal form. 16/973 useless extension candidates. Maximal degree in co-relation 5111. Up to 196 conditions per place. [2024-06-20 17:45:07,744 INFO L140 encePairwiseOnDemand]: 29/37 looper letters, 53 selfloop transitions, 55 changer transitions 0/157 dead transitions. [2024-06-20 17:45:07,745 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 157 transitions, 2183 flow [2024-06-20 17:45:07,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:45:07,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:45:07,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 140 transitions. [2024-06-20 17:45:07,746 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6306306306306306 [2024-06-20 17:45:07,746 INFO L175 Difference]: Start difference. First operand has 174 places, 142 transitions, 1865 flow. Second operand 6 states and 140 transitions. [2024-06-20 17:45:07,746 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 157 transitions, 2183 flow [2024-06-20 17:45:07,798 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 157 transitions, 2088 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-20 17:45:07,800 INFO L231 Difference]: Finished difference. Result has 175 places, 143 transitions, 1907 flow [2024-06-20 17:45:07,801 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=1772, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1907, PETRI_PLACES=175, PETRI_TRANSITIONS=143} [2024-06-20 17:45:07,801 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 137 predicate places. [2024-06-20 17:45:07,801 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 143 transitions, 1907 flow [2024-06-20 17:45:07,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:45:07,802 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:45:07,802 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:45:07,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-20 17:45:07,802 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)] === [2024-06-20 17:45:07,803 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:45:07,803 INFO L85 PathProgramCache]: Analyzing trace with hash -1381040956, now seen corresponding path program 2 times [2024-06-20 17:45:07,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:45:07,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640218552] [2024-06-20 17:45:07,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:45:07,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:45:07,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:45:07,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:45:07,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:45:07,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640218552] [2024-06-20 17:45:07,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640218552] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:45:07,880 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:45:07,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:45:07,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801480156] [2024-06-20 17:45:07,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:45:07,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 17:45:07,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:45:07,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 17:45:07,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-20 17:45:07,917 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 37 [2024-06-20 17:45:07,917 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 143 transitions, 1907 flow. Second operand has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:45:07,917 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:45:07,917 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 37 [2024-06-20 17:45:07,918 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:45:08,052 INFO L124 PetriNetUnfolderBase]: 394/1034 cut-off events. [2024-06-20 17:45:08,052 INFO L125 PetriNetUnfolderBase]: For 22212/22235 co-relation queries the response was YES. [2024-06-20 17:45:08,060 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5862 conditions, 1034 events. 394/1034 cut-off events. For 22212/22235 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 7147 event pairs, 84 based on Foata normal form. 10/1029 useless extension candidates. Maximal degree in co-relation 5625. Up to 278 conditions per place. [2024-06-20 17:45:08,064 INFO L140 encePairwiseOnDemand]: 30/37 looper letters, 75 selfloop transitions, 33 changer transitions 0/157 dead transitions. [2024-06-20 17:45:08,064 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 157 transitions, 2289 flow [2024-06-20 17:45:08,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:45:08,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:45:08,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 135 transitions. [2024-06-20 17:45:08,065 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6081081081081081 [2024-06-20 17:45:08,065 INFO L175 Difference]: Start difference. First operand has 175 places, 143 transitions, 1907 flow. Second operand 6 states and 135 transitions. [2024-06-20 17:45:08,065 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 157 transitions, 2289 flow [2024-06-20 17:45:08,157 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 157 transitions, 2182 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-20 17:45:08,160 INFO L231 Difference]: Finished difference. Result has 178 places, 145 transitions, 1915 flow [2024-06-20 17:45:08,160 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=1800, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1915, PETRI_PLACES=178, PETRI_TRANSITIONS=145} [2024-06-20 17:45:08,160 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 140 predicate places. [2024-06-20 17:45:08,161 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 145 transitions, 1915 flow [2024-06-20 17:45:08,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:45:08,161 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:45:08,161 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:45:08,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-20 17:45:08,161 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)] === [2024-06-20 17:45:08,162 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:45:08,162 INFO L85 PathProgramCache]: Analyzing trace with hash -437846502, now seen corresponding path program 3 times [2024-06-20 17:45:08,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:45:08,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345409579] [2024-06-20 17:45:08,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:45:08,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:45:08,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:45:08,236 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:45:08,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:45:08,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345409579] [2024-06-20 17:45:08,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345409579] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:45:08,237 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:45:08,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:45:08,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270378299] [2024-06-20 17:45:08,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:45:08,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 17:45:08,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:45:08,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 17:45:08,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-20 17:45:08,266 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 37 [2024-06-20 17:45:08,267 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 145 transitions, 1915 flow. Second operand has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:45:08,267 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:45:08,267 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 37 [2024-06-20 17:45:08,267 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:45:08,399 INFO L124 PetriNetUnfolderBase]: 390/1030 cut-off events. [2024-06-20 17:45:08,399 INFO L125 PetriNetUnfolderBase]: For 21849/21873 co-relation queries the response was YES. [2024-06-20 17:45:08,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5623 conditions, 1030 events. 390/1030 cut-off events. For 21849/21873 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 7140 event pairs, 77 based on Foata normal form. 16/1033 useless extension candidates. Maximal degree in co-relation 5387. Up to 276 conditions per place. [2024-06-20 17:45:08,408 INFO L140 encePairwiseOnDemand]: 30/37 looper letters, 81 selfloop transitions, 27 changer transitions 0/157 dead transitions. [2024-06-20 17:45:08,408 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 157 transitions, 2215 flow [2024-06-20 17:45:08,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:45:08,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:45:08,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 136 transitions. [2024-06-20 17:45:08,409 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6126126126126126 [2024-06-20 17:45:08,410 INFO L175 Difference]: Start difference. First operand has 178 places, 145 transitions, 1915 flow. Second operand 6 states and 136 transitions. [2024-06-20 17:45:08,410 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 157 transitions, 2215 flow [2024-06-20 17:45:08,462 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 157 transitions, 2160 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-20 17:45:08,465 INFO L231 Difference]: Finished difference. Result has 181 places, 145 transitions, 1920 flow [2024-06-20 17:45:08,465 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=1860, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1920, PETRI_PLACES=181, PETRI_TRANSITIONS=145} [2024-06-20 17:45:08,466 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 143 predicate places. [2024-06-20 17:45:08,466 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 145 transitions, 1920 flow [2024-06-20 17:45:08,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:45:08,466 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:45:08,466 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:45:08,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-20 17:45:08,466 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)] === [2024-06-20 17:45:08,467 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:45:08,467 INFO L85 PathProgramCache]: Analyzing trace with hash 1771629650, now seen corresponding path program 4 times [2024-06-20 17:45:08,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:45:08,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548049896] [2024-06-20 17:45:08,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:45:08,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:45:08,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:45:08,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:45:08,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:45:08,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548049896] [2024-06-20 17:45:08,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548049896] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:45:08,540 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:45:08,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:45:08,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424824722] [2024-06-20 17:45:08,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:45:08,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 17:45:08,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:45:08,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 17:45:08,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-20 17:45:08,574 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 37 [2024-06-20 17:45:08,574 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 145 transitions, 1920 flow. Second operand has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:45:08,574 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:45:08,574 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 37 [2024-06-20 17:45:08,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:45:08,735 INFO L124 PetriNetUnfolderBase]: 395/1047 cut-off events. [2024-06-20 17:45:08,736 INFO L125 PetriNetUnfolderBase]: For 20463/20490 co-relation queries the response was YES. [2024-06-20 17:45:08,742 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5729 conditions, 1047 events. 395/1047 cut-off events. For 20463/20490 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 7286 event pairs, 95 based on Foata normal form. 10/1039 useless extension candidates. Maximal degree in co-relation 5329. Up to 326 conditions per place. [2024-06-20 17:45:08,745 INFO L140 encePairwiseOnDemand]: 31/37 looper letters, 77 selfloop transitions, 31 changer transitions 0/157 dead transitions. [2024-06-20 17:45:08,745 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 157 transitions, 2292 flow [2024-06-20 17:45:08,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:45:08,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:45:08,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 132 transitions. [2024-06-20 17:45:08,747 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5945945945945946 [2024-06-20 17:45:08,747 INFO L175 Difference]: Start difference. First operand has 181 places, 145 transitions, 1920 flow. Second operand 6 states and 132 transitions. [2024-06-20 17:45:08,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 157 transitions, 2292 flow [2024-06-20 17:45:08,814 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 157 transitions, 2227 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-06-20 17:45:08,817 INFO L231 Difference]: Finished difference. Result has 182 places, 146 transitions, 1935 flow [2024-06-20 17:45:08,817 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=1855, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1935, PETRI_PLACES=182, PETRI_TRANSITIONS=146} [2024-06-20 17:45:08,818 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 144 predicate places. [2024-06-20 17:45:08,818 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 146 transitions, 1935 flow [2024-06-20 17:45:08,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:45:08,818 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:45:08,818 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:45:08,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-20 17:45:08,818 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)] === [2024-06-20 17:45:08,819 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:45:08,819 INFO L85 PathProgramCache]: Analyzing trace with hash 1774430810, now seen corresponding path program 5 times [2024-06-20 17:45:08,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:45:08,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299018851] [2024-06-20 17:45:08,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:45:08,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:45:08,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:45:08,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:45:08,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:45:08,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299018851] [2024-06-20 17:45:08,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299018851] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:45:08,915 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:45:08,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:45:08,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831939471] [2024-06-20 17:45:08,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:45:08,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 17:45:08,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:45:08,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 17:45:08,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-20 17:45:08,947 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 37 [2024-06-20 17:45:08,947 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 146 transitions, 1935 flow. Second operand has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:45:08,947 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:45:08,947 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 37 [2024-06-20 17:45:08,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:45:09,094 INFO L124 PetriNetUnfolderBase]: 389/1033 cut-off events. [2024-06-20 17:45:09,094 INFO L125 PetriNetUnfolderBase]: For 20140/20160 co-relation queries the response was YES. [2024-06-20 17:45:09,099 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5459 conditions, 1033 events. 389/1033 cut-off events. For 20140/20160 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 7142 event pairs, 88 based on Foata normal form. 12/1028 useless extension candidates. Maximal degree in co-relation 5066. Up to 324 conditions per place. [2024-06-20 17:45:09,103 INFO L140 encePairwiseOnDemand]: 31/37 looper letters, 88 selfloop transitions, 20 changer transitions 0/157 dead transitions. [2024-06-20 17:45:09,103 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 157 transitions, 2297 flow [2024-06-20 17:45:09,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:45:09,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:45:09,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 133 transitions. [2024-06-20 17:45:09,104 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5990990990990991 [2024-06-20 17:45:09,104 INFO L175 Difference]: Start difference. First operand has 182 places, 146 transitions, 1935 flow. Second operand 6 states and 133 transitions. [2024-06-20 17:45:09,104 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 157 transitions, 2297 flow [2024-06-20 17:45:09,161 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 157 transitions, 2234 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-20 17:45:09,164 INFO L231 Difference]: Finished difference. Result has 183 places, 146 transitions, 1918 flow [2024-06-20 17:45:09,164 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=1872, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1918, PETRI_PLACES=183, PETRI_TRANSITIONS=146} [2024-06-20 17:45:09,164 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 145 predicate places. [2024-06-20 17:45:09,164 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 146 transitions, 1918 flow [2024-06-20 17:45:09,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:45:09,165 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:45:09,165 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:45:09,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-20 17:45:09,165 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)] === [2024-06-20 17:45:09,165 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:45:09,165 INFO L85 PathProgramCache]: Analyzing trace with hash 1774426160, now seen corresponding path program 6 times [2024-06-20 17:45:09,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:45:09,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184710031] [2024-06-20 17:45:09,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:45:09,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:45:09,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:45:09,236 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:45:09,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:45:09,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184710031] [2024-06-20 17:45:09,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184710031] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:45:09,237 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:45:09,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:45:09,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581268991] [2024-06-20 17:45:09,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:45:09,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 17:45:09,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:45:09,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 17:45:09,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-20 17:45:09,264 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 37 [2024-06-20 17:45:09,265 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 146 transitions, 1918 flow. Second operand has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:45:09,265 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:45:09,265 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 37 [2024-06-20 17:45:09,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:45:09,395 INFO L124 PetriNetUnfolderBase]: 386/1028 cut-off events. [2024-06-20 17:45:09,395 INFO L125 PetriNetUnfolderBase]: For 16746/16762 co-relation queries the response was YES. [2024-06-20 17:45:09,400 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5358 conditions, 1028 events. 386/1028 cut-off events. For 16746/16762 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 7088 event pairs, 88 based on Foata normal form. 6/1019 useless extension candidates. Maximal degree in co-relation 4966. Up to 322 conditions per place. [2024-06-20 17:45:09,404 INFO L140 encePairwiseOnDemand]: 31/37 looper letters, 88 selfloop transitions, 19 changer transitions 0/156 dead transitions. [2024-06-20 17:45:09,404 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 156 transitions, 2216 flow [2024-06-20 17:45:09,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:45:09,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:45:09,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 133 transitions. [2024-06-20 17:45:09,405 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5990990990990991 [2024-06-20 17:45:09,405 INFO L175 Difference]: Start difference. First operand has 183 places, 146 transitions, 1918 flow. Second operand 6 states and 133 transitions. [2024-06-20 17:45:09,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 156 transitions, 2216 flow [2024-06-20 17:45:09,459 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 156 transitions, 2157 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-20 17:45:09,461 INFO L231 Difference]: Finished difference. Result has 184 places, 146 transitions, 1901 flow [2024-06-20 17:45:09,461 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=1859, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1901, PETRI_PLACES=184, PETRI_TRANSITIONS=146} [2024-06-20 17:45:09,463 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 146 predicate places. [2024-06-20 17:45:09,463 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 146 transitions, 1901 flow [2024-06-20 17:45:09,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:45:09,463 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:45:09,463 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:45:09,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-20 17:45:09,464 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 17:45:09,464 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:45:09,464 INFO L85 PathProgramCache]: Analyzing trace with hash -1700235337, now seen corresponding path program 1 times [2024-06-20 17:45:09,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:45:09,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960148670] [2024-06-20 17:45:09,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:45:09,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:45:09,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:45:09,545 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:45:09,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:45:09,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960148670] [2024-06-20 17:45:09,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960148670] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:45:09,546 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:45:09,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:45:09,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108018976] [2024-06-20 17:45:09,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:45:09,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 17:45:09,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:45:09,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 17:45:09,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-20 17:45:09,581 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 37 [2024-06-20 17:45:09,582 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 146 transitions, 1901 flow. Second operand has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:45:09,582 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:45:09,582 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 37 [2024-06-20 17:45:09,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:45:09,711 INFO L124 PetriNetUnfolderBase]: 377/1016 cut-off events. [2024-06-20 17:45:09,712 INFO L125 PetriNetUnfolderBase]: For 16035/16048 co-relation queries the response was YES. [2024-06-20 17:45:09,717 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5208 conditions, 1016 events. 377/1016 cut-off events. For 16035/16048 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 7082 event pairs, 105 based on Foata normal form. 2/1002 useless extension candidates. Maximal degree in co-relation 4811. Up to 292 conditions per place. [2024-06-20 17:45:09,720 INFO L140 encePairwiseOnDemand]: 31/37 looper letters, 68 selfloop transitions, 27 changer transitions 10/154 dead transitions. [2024-06-20 17:45:09,721 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 154 transitions, 2193 flow [2024-06-20 17:45:09,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:45:09,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:45:09,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 131 transitions. [2024-06-20 17:45:09,722 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5900900900900901 [2024-06-20 17:45:09,722 INFO L175 Difference]: Start difference. First operand has 184 places, 146 transitions, 1901 flow. Second operand 6 states and 131 transitions. [2024-06-20 17:45:09,722 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 154 transitions, 2193 flow [2024-06-20 17:45:09,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 154 transitions, 2126 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-20 17:45:09,777 INFO L231 Difference]: Finished difference. Result has 184 places, 140 transitions, 1808 flow [2024-06-20 17:45:09,778 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=1834, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1808, PETRI_PLACES=184, PETRI_TRANSITIONS=140} [2024-06-20 17:45:09,778 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 146 predicate places. [2024-06-20 17:45:09,778 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 140 transitions, 1808 flow [2024-06-20 17:45:09,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:45:09,779 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:45:09,779 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:45:09,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-20 17:45:09,779 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 17:45:09,779 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:45:09,779 INFO L85 PathProgramCache]: Analyzing trace with hash -1824735663, now seen corresponding path program 2 times [2024-06-20 17:45:09,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:45:09,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840346263] [2024-06-20 17:45:09,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:45:09,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:45:09,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:45:09,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:45:09,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:45:09,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840346263] [2024-06-20 17:45:09,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840346263] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:45:09,852 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:45:09,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:45:09,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162143574] [2024-06-20 17:45:09,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:45:09,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 17:45:09,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:45:09,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 17:45:09,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-20 17:45:09,889 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 37 [2024-06-20 17:45:09,890 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 140 transitions, 1808 flow. Second operand has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:45:09,890 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:45:09,890 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 37 [2024-06-20 17:45:09,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:45:10,007 INFO L124 PetriNetUnfolderBase]: 346/943 cut-off events. [2024-06-20 17:45:10,007 INFO L125 PetriNetUnfolderBase]: For 14975/14988 co-relation queries the response was YES. [2024-06-20 17:45:10,012 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4815 conditions, 943 events. 346/943 cut-off events. For 14975/14988 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 6483 event pairs, 100 based on Foata normal form. 2/929 useless extension candidates. Maximal degree in co-relation 4457. Up to 274 conditions per place. [2024-06-20 17:45:10,015 INFO L140 encePairwiseOnDemand]: 30/37 looper letters, 42 selfloop transitions, 55 changer transitions 0/146 dead transitions. [2024-06-20 17:45:10,015 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 146 transitions, 2014 flow [2024-06-20 17:45:10,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:45:10,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:45:10,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 131 transitions. [2024-06-20 17:45:10,016 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5900900900900901 [2024-06-20 17:45:10,016 INFO L175 Difference]: Start difference. First operand has 184 places, 140 transitions, 1808 flow. Second operand 6 states and 131 transitions. [2024-06-20 17:45:10,017 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 146 transitions, 2014 flow [2024-06-20 17:45:10,062 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 146 transitions, 1897 flow, removed 6 selfloop flow, removed 11 redundant places. [2024-06-20 17:45:10,064 INFO L231 Difference]: Finished difference. Result has 174 places, 140 transitions, 1805 flow [2024-06-20 17:45:10,065 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=1691, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1805, PETRI_PLACES=174, PETRI_TRANSITIONS=140} [2024-06-20 17:45:10,065 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 136 predicate places. [2024-06-20 17:45:10,065 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 140 transitions, 1805 flow [2024-06-20 17:45:10,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:45:10,065 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:45:10,065 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:45:10,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-20 17:45:10,066 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 17:45:10,066 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:45:10,066 INFO L85 PathProgramCache]: Analyzing trace with hash -14110680, now seen corresponding path program 1 times [2024-06-20 17:45:10,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:45:10,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877188370] [2024-06-20 17:45:10,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:45:10,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:45:10,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:45:10,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:45:10,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:45:10,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877188370] [2024-06-20 17:45:10,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877188370] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:45:10,142 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:45:10,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:45:10,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229016335] [2024-06-20 17:45:10,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:45:10,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 17:45:10,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:45:10,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 17:45:10,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-20 17:45:10,181 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 37 [2024-06-20 17:45:10,181 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 140 transitions, 1805 flow. Second operand has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:45:10,181 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:45:10,181 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 37 [2024-06-20 17:45:10,181 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:45:10,327 INFO L124 PetriNetUnfolderBase]: 352/950 cut-off events. [2024-06-20 17:45:10,327 INFO L125 PetriNetUnfolderBase]: For 12632/12645 co-relation queries the response was YES. [2024-06-20 17:45:10,331 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4780 conditions, 950 events. 352/950 cut-off events. For 12632/12645 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 6495 event pairs, 50 based on Foata normal form. 2/942 useless extension candidates. Maximal degree in co-relation 4553. Up to 135 conditions per place. [2024-06-20 17:45:10,334 INFO L140 encePairwiseOnDemand]: 30/37 looper letters, 47 selfloop transitions, 59 changer transitions 0/155 dead transitions. [2024-06-20 17:45:10,334 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 155 transitions, 2113 flow [2024-06-20 17:45:10,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:45:10,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:45:10,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 141 transitions. [2024-06-20 17:45:10,335 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6351351351351351 [2024-06-20 17:45:10,335 INFO L175 Difference]: Start difference. First operand has 174 places, 140 transitions, 1805 flow. Second operand 6 states and 141 transitions. [2024-06-20 17:45:10,335 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 155 transitions, 2113 flow [2024-06-20 17:45:10,376 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 155 transitions, 1990 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-20 17:45:10,378 INFO L231 Difference]: Finished difference. Result has 174 places, 140 transitions, 1806 flow [2024-06-20 17:45:10,379 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=1682, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1806, PETRI_PLACES=174, PETRI_TRANSITIONS=140} [2024-06-20 17:45:10,379 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 136 predicate places. [2024-06-20 17:45:10,379 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 140 transitions, 1806 flow [2024-06-20 17:45:10,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:45:10,380 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:45:10,380 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:45:10,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-20 17:45:10,380 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 17:45:10,380 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:45:10,380 INFO L85 PathProgramCache]: Analyzing trace with hash -206409370, now seen corresponding path program 2 times [2024-06-20 17:45:10,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:45:10,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077729318] [2024-06-20 17:45:10,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:45:10,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:45:10,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:45:10,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:45:10,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:45:10,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077729318] [2024-06-20 17:45:10,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077729318] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:45:10,457 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:45:10,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:45:10,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406901757] [2024-06-20 17:45:10,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:45:10,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 17:45:10,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:45:10,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 17:45:10,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-20 17:45:10,493 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 37 [2024-06-20 17:45:10,493 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 140 transitions, 1806 flow. Second operand has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:45:10,493 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:45:10,493 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 37 [2024-06-20 17:45:10,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:45:10,607 INFO L124 PetriNetUnfolderBase]: 356/958 cut-off events. [2024-06-20 17:45:10,607 INFO L125 PetriNetUnfolderBase]: For 13309/13322 co-relation queries the response was YES. [2024-06-20 17:45:10,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4845 conditions, 958 events. 356/958 cut-off events. For 13309/13322 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 6555 event pairs, 51 based on Foata normal form. 2/950 useless extension candidates. Maximal degree in co-relation 4611. Up to 212 conditions per place. [2024-06-20 17:45:10,615 INFO L140 encePairwiseOnDemand]: 31/37 looper letters, 67 selfloop transitions, 26 changer transitions 11/153 dead transitions. [2024-06-20 17:45:10,615 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 153 transitions, 2120 flow [2024-06-20 17:45:10,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:45:10,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:45:10,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 135 transitions. [2024-06-20 17:45:10,620 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6081081081081081 [2024-06-20 17:45:10,620 INFO L175 Difference]: Start difference. First operand has 174 places, 140 transitions, 1806 flow. Second operand 6 states and 135 transitions. [2024-06-20 17:45:10,620 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 153 transitions, 2120 flow [2024-06-20 17:45:10,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 153 transitions, 1940 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-20 17:45:10,669 INFO L231 Difference]: Finished difference. Result has 172 places, 134 transitions, 1619 flow [2024-06-20 17:45:10,670 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=1631, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1619, PETRI_PLACES=172, PETRI_TRANSITIONS=134} [2024-06-20 17:45:10,670 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 134 predicate places. [2024-06-20 17:45:10,670 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 134 transitions, 1619 flow [2024-06-20 17:45:10,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:45:10,671 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:45:10,671 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:45:10,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-20 17:45:10,671 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 17:45:10,671 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:45:10,671 INFO L85 PathProgramCache]: Analyzing trace with hash 2062351812, now seen corresponding path program 3 times [2024-06-20 17:45:10,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:45:10,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106108711] [2024-06-20 17:45:10,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:45:10,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:45:10,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:45:10,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:45:10,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:45:10,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106108711] [2024-06-20 17:45:10,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106108711] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:45:10,745 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:45:10,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:45:10,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500237962] [2024-06-20 17:45:10,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:45:10,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 17:45:10,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:45:10,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 17:45:10,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-20 17:45:10,780 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 37 [2024-06-20 17:45:10,781 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 134 transitions, 1619 flow. Second operand has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:45:10,781 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:45:10,781 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 37 [2024-06-20 17:45:10,781 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:45:10,903 INFO L124 PetriNetUnfolderBase]: 315/860 cut-off events. [2024-06-20 17:45:10,903 INFO L125 PetriNetUnfolderBase]: For 11126/11137 co-relation queries the response was YES. [2024-06-20 17:45:10,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4155 conditions, 860 events. 315/860 cut-off events. For 11126/11137 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 5769 event pairs, 60 based on Foata normal form. 2/850 useless extension candidates. Maximal degree in co-relation 3931. Up to 208 conditions per place. [2024-06-20 17:45:10,910 INFO L140 encePairwiseOnDemand]: 29/37 looper letters, 72 selfloop transitions, 22 changer transitions 8/151 dead transitions. [2024-06-20 17:45:10,910 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 151 transitions, 1863 flow [2024-06-20 17:45:10,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:45:10,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:45:10,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 140 transitions. [2024-06-20 17:45:10,911 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6306306306306306 [2024-06-20 17:45:10,911 INFO L175 Difference]: Start difference. First operand has 172 places, 134 transitions, 1619 flow. Second operand 6 states and 140 transitions. [2024-06-20 17:45:10,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 151 transitions, 1863 flow [2024-06-20 17:45:10,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 151 transitions, 1801 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-20 17:45:10,948 INFO L231 Difference]: Finished difference. Result has 164 places, 129 transitions, 1549 flow [2024-06-20 17:45:10,948 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=1557, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1549, PETRI_PLACES=164, PETRI_TRANSITIONS=129} [2024-06-20 17:45:10,949 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 126 predicate places. [2024-06-20 17:45:10,949 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 129 transitions, 1549 flow [2024-06-20 17:45:10,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:45:10,949 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:45:10,949 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:45:10,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-20 17:45:10,950 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 17:45:10,950 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:45:10,950 INFO L85 PathProgramCache]: Analyzing trace with hash -1958057263, now seen corresponding path program 1 times [2024-06-20 17:45:10,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:45:10,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17328058] [2024-06-20 17:45:10,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:45:10,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:45:10,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:45:11,022 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:45:11,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:45:11,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17328058] [2024-06-20 17:45:11,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17328058] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:45:11,023 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:45:11,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:45:11,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525575676] [2024-06-20 17:45:11,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:45:11,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 17:45:11,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:45:11,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 17:45:11,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-20 17:45:11,061 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 37 [2024-06-20 17:45:11,061 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 129 transitions, 1549 flow. Second operand has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:45:11,061 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:45:11,062 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 37 [2024-06-20 17:45:11,062 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:45:11,157 INFO L124 PetriNetUnfolderBase]: 291/789 cut-off events. [2024-06-20 17:45:11,157 INFO L125 PetriNetUnfolderBase]: For 8794/8807 co-relation queries the response was YES. [2024-06-20 17:45:11,161 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3766 conditions, 789 events. 291/789 cut-off events. For 8794/8807 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 5173 event pairs, 22 based on Foata normal form. 4/783 useless extension candidates. Maximal degree in co-relation 3573. Up to 213 conditions per place. [2024-06-20 17:45:11,162 INFO L140 encePairwiseOnDemand]: 29/37 looper letters, 38 selfloop transitions, 18 changer transitions 55/143 dead transitions. [2024-06-20 17:45:11,162 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 143 transitions, 1769 flow [2024-06-20 17:45:11,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:45:11,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:45:11,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 138 transitions. [2024-06-20 17:45:11,165 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6216216216216216 [2024-06-20 17:45:11,165 INFO L175 Difference]: Start difference. First operand has 164 places, 129 transitions, 1549 flow. Second operand 6 states and 138 transitions. [2024-06-20 17:45:11,165 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 143 transitions, 1769 flow [2024-06-20 17:45:11,189 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 143 transitions, 1707 flow, removed 6 selfloop flow, removed 11 redundant places. [2024-06-20 17:45:11,190 INFO L231 Difference]: Finished difference. Result has 155 places, 82 transitions, 894 flow [2024-06-20 17:45:11,190 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=1487, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=894, PETRI_PLACES=155, PETRI_TRANSITIONS=82} [2024-06-20 17:45:11,191 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 117 predicate places. [2024-06-20 17:45:11,191 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 82 transitions, 894 flow [2024-06-20 17:45:11,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:45:11,191 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:45:11,191 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:45:11,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-20 17:45:11,192 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 17:45:11,192 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:45:11,192 INFO L85 PathProgramCache]: Analyzing trace with hash -1575778163, now seen corresponding path program 2 times [2024-06-20 17:45:11,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:45:11,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622587084] [2024-06-20 17:45:11,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:45:11,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:45:11,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:45:11,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:45:11,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:45:11,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622587084] [2024-06-20 17:45:11,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622587084] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:45:11,263 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:45:11,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:45:11,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830689716] [2024-06-20 17:45:11,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:45:11,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 17:45:11,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:45:11,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 17:45:11,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-20 17:45:11,301 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 37 [2024-06-20 17:45:11,302 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 82 transitions, 894 flow. Second operand has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:45:11,302 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:45:11,302 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 37 [2024-06-20 17:45:11,302 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:45:11,349 INFO L124 PetriNetUnfolderBase]: 156/435 cut-off events. [2024-06-20 17:45:11,349 INFO L125 PetriNetUnfolderBase]: For 4341/4351 co-relation queries the response was YES. [2024-06-20 17:45:11,351 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1963 conditions, 435 events. 156/435 cut-off events. For 4341/4351 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 2424 event pairs, 18 based on Foata normal form. 4/432 useless extension candidates. Maximal degree in co-relation 1906. Up to 80 conditions per place. [2024-06-20 17:45:11,351 INFO L140 encePairwiseOnDemand]: 32/37 looper letters, 0 selfloop transitions, 0 changer transitions 87/87 dead transitions. [2024-06-20 17:45:11,351 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 87 transitions, 964 flow [2024-06-20 17:45:11,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:45:11,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:45:11,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 120 transitions. [2024-06-20 17:45:11,352 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5405405405405406 [2024-06-20 17:45:11,352 INFO L175 Difference]: Start difference. First operand has 155 places, 82 transitions, 894 flow. Second operand 6 states and 120 transitions. [2024-06-20 17:45:11,352 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 87 transitions, 964 flow [2024-06-20 17:45:11,359 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 87 transitions, 681 flow, removed 11 selfloop flow, removed 46 redundant places. [2024-06-20 17:45:11,360 INFO L231 Difference]: Finished difference. Result has 98 places, 0 transitions, 0 flow [2024-06-20 17:45:11,360 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=559, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=0, PETRI_PLACES=98, PETRI_TRANSITIONS=0} [2024-06-20 17:45:11,361 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 60 predicate places. [2024-06-20 17:45:11,361 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 0 transitions, 0 flow [2024-06-20 17:45:11,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:45:11,363 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 4 remaining) [2024-06-20 17:45:11,364 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (2 of 4 remaining) [2024-06-20 17:45:11,364 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2024-06-20 17:45:11,364 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2024-06-20 17:45:11,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-20 17:45:11,365 INFO L445 BasicCegarLoop]: Path program histogram: [6, 5, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:45:11,367 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2024-06-20 17:45:11,367 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2024-06-20 17:45:11,370 INFO L507 ceAbstractionStarter]: Automizer considered 2 witness invariants [2024-06-20 17:45:11,370 INFO L508 ceAbstractionStarter]: WitnessConsidered=2 [2024-06-20 17:45:11,371 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.06 05:45:11 BasicIcfg [2024-06-20 17:45:11,371 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-06-20 17:45:11,371 INFO L158 Benchmark]: Toolchain (without parser) took 14905.41ms. Allocated memory was 182.5MB in the beginning and 585.1MB in the end (delta: 402.7MB). Free memory was 120.6MB in the beginning and 408.0MB in the end (delta: -287.3MB). Peak memory consumption was 117.2MB. Max. memory is 16.1GB. [2024-06-20 17:45:11,372 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 182.5MB. Free memory is still 147.3MB. There was no memory consumed. Max. memory is 16.1GB. [2024-06-20 17:45:11,372 INFO L158 Benchmark]: Witness Parser took 0.43ms. Allocated memory is still 182.5MB. Free memory is still 124.3MB. There was no memory consumed. Max. memory is 16.1GB. [2024-06-20 17:45:11,372 INFO L158 Benchmark]: CACSL2BoogieTranslator took 507.16ms. Allocated memory is still 182.5MB. Free memory was 120.2MB in the beginning and 93.8MB in the end (delta: 26.4MB). Peak memory consumption was 27.3MB. Max. memory is 16.1GB. [2024-06-20 17:45:11,372 INFO L158 Benchmark]: Boogie Procedure Inliner took 35.84ms. Allocated memory is still 182.5MB. Free memory was 93.8MB in the beginning and 91.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-06-20 17:45:11,372 INFO L158 Benchmark]: Boogie Preprocessor took 39.38ms. Allocated memory is still 182.5MB. Free memory was 91.7MB in the beginning and 89.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-06-20 17:45:11,373 INFO L158 Benchmark]: RCFGBuilder took 414.37ms. Allocated memory is still 182.5MB. Free memory was 89.6MB in the beginning and 65.7MB in the end (delta: 23.9MB). Peak memory consumption was 23.1MB. Max. memory is 16.1GB. [2024-06-20 17:45:11,373 INFO L158 Benchmark]: TraceAbstraction took 13904.01ms. Allocated memory was 182.5MB in the beginning and 585.1MB in the end (delta: 402.7MB). Free memory was 64.9MB in the beginning and 408.0MB in the end (delta: -343.1MB). Peak memory consumption was 62.7MB. Max. memory is 16.1GB. [2024-06-20 17:45:11,374 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 182.5MB. Free memory is still 147.3MB. There was no memory consumed. Max. memory is 16.1GB. * Witness Parser took 0.43ms. Allocated memory is still 182.5MB. Free memory is still 124.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 507.16ms. Allocated memory is still 182.5MB. Free memory was 120.2MB in the beginning and 93.8MB in the end (delta: 26.4MB). Peak memory consumption was 27.3MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 35.84ms. Allocated memory is still 182.5MB. Free memory was 93.8MB in the beginning and 91.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 39.38ms. Allocated memory is still 182.5MB. Free memory was 91.7MB in the beginning and 89.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 414.37ms. Allocated memory is still 182.5MB. Free memory was 89.6MB in the beginning and 65.7MB in the end (delta: 23.9MB). Peak memory consumption was 23.1MB. Max. memory is 16.1GB. * TraceAbstraction took 13904.01ms. Allocated memory was 182.5MB in the beginning and 585.1MB in the end (delta: 402.7MB). Free memory was 64.9MB in the beginning and 408.0MB in the end (delta: -343.1MB). Peak memory consumption was 62.7MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 762]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 763]: 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, 60 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: 13.8s, OverallIterations: 46, TraceHistogramMax: 1, PathProgramHistogramMax: 6, EmptinessCheckTime: 0.0s, AutomataDifference: 9.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 3509 SdHoareTripleChecker+Valid, 3.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2509 mSDsluCounter, 1344 SdHoareTripleChecker+Invalid, 2.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 978 mSDsCounter, 220 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 5831 IncrementalHoareTripleChecker+Invalid, 6051 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 220 mSolverCounterUnsat, 366 mSDtfsCounter, 5831 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 231 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 188 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=2103occurred in iteration=28, InterpolantAutomatonStates: 278, 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, 3.9s InterpolantComputationTime, 742 NumberOfCodeBlocks, 742 NumberOfCodeBlocksAsserted, 46 NumberOfCheckSat, 696 ConstructedInterpolants, 0 QuantifiedInterpolants, 2889 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 46 InterpolantComputations, 46 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! [2024-06-20 17:45:11,403 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